Academic literature on the topic 'Interlocking blocks'
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Journal articles on the topic "Interlocking blocks"
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Chen, Gong, Ming Qiao Zhu, and Yun Du Cai. "Shape Optimization and Mix Proportion Design of Innovative Interlocking Mortarless Block." Advanced Materials Research 1065-1069 (December 2014): 2017–20. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.2017.
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Mortarless interlocking blocks have the advantage of convenient construction and low cost, but establishing the geometry interlocking mechanism between horizontal blocks has been overlooked. Optimizing the shape of mortarless interlocking block. The connection of vertical direction in the form of a frustum of a cone, and the connection of horizontal direction in the form of trapezoid shape. This design proposal builds geometry interlocking mechanism between the block and its all adjacent ones. Setting cone and rectangular holes on block body, accordingly, block laying could forming taper vertical channel and rectangular vertical channel. The concrete of interlocking mortarless block has particularity, which is not suitable for “Mix Proportion Design of Ordinary Concrete Regulation” (JGJ55-2010) of China. This paper presents a platter idea to establish the concrete mix proportion design method of mortarless interlocking block, moreover, an example calculation and confirmatory experiment is dispensable.
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Wani, Mohammad Vekas, and Mr Chitranjan Kumar. "Behaviour of Interlocking Hollow Concrete Blocks." International Journal of Trend in Scientific Research and Development Volume-2, Issue-4 (June 30, 2018): 2850–82. http://dx.doi.org/10.31142/ijtsrd14173.
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Wani, Mohammad Vekas, and Mr Chitranjan Kumar. "Behaviour of Interlocking Hollow Concrete Blocks." International Journal of Trend in Scientific Research and Development Volume-2, Issue-5 (August 31, 2018): 1853–63. http://dx.doi.org/10.31142/ijtsrd18203.
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Babu, Mr S. Hari. "Interlocking Plastic Blocks (IPB)." International Journal for Research in Applied Science and Engineering Technology 9, no. 4 (April 30, 2021): 1–5. http://dx.doi.org/10.22214/ijraset.2021.33423.
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Teguh, Mochamad, Novi Rahmayanti, and Zakki Rizal. "Mechanical Properties of Various Models of Interlocking Concrete Blocks under In-Plane and Out-of-Plane Loads." Key Engineering Materials 881 (April 2021): 149–56. http://dx.doi.org/10.4028/www.scientific.net/kem.881.149.
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Building material innovations in various interlocking concrete block masonry from local materials to withstand lateral earthquake forces is an exciting issue in masonry wall research. The block hook has an advantage in the interlocking system's invention to withstand loads in the in-plane and out-of-plane orientations commonly required by the masonry walls against earthquake forces. Reviews of the investigation of in-plane and out-of-plane masonry walls have rarely been found in previous studies. In this paper, the results of a series of experimental tests with different interlocking models in resisting the simultaneous in-plane shear and out-of-plane bending actions on concrete blocks are presented. This paper presents a research investigation of various interlocking concrete blocks' mechanical properties with different hook thicknesses. Discussion of the trends mentioned above and their implications towards interlocking concrete block mechanical properties is provided.
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Ma, Hongwang, Qi Ma, and Prakash Gaire. "Development and mechanical evaluation of a new interlocking earth masonry block." Advances in Structural Engineering 23, no. 2 (August 8, 2019): 234–47. http://dx.doi.org/10.1177/1369433219868931.
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An innovative interlocking compressed earth block, called interlocking compressed earth block developed at Shanghai Jiao Tong University, was developed for structural masonry. The locking mechanism of the interlocking compressed earth block developed at Shanghai Jiao Tong University completely depends on the grout in the vertical holes. Therefore, there is no gap between the interlocking key and the blocks, which increases the wall stability and reduces the block manufacturing costs. Experimental studies on the mechanical behavior of the unit (the block) and the masonry (prism constructed with a dry interface) were performed in accordance with the related standards. Soil samples from the northern Gansu Province of China were collected and studied. Small cylindrical samples were tested to determine the compressive and splitting tensile strength. Subsequently, the compressive strength of the prisms with three dry-stack blocks and the shear behavior of the masonry through the triplet test were investigated. The results show that the compressive and shear strengths meet the related standards. This work may provide a valuable structural system for low-cost, eco-friendly dwelling in developing countries.
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Chang, Yu Jiao, Biao Ma, Fang Qin, and Xuan Lv. "Application of Interlocking Block Pavement in Rural Highway." Advanced Materials Research 287-290 (July 2011): 926–29. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.926.
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Concrete interlocking block pavement is characterized of preferred durability, easy construction and maintenance and low construction cost. It can be widely applied in the rural highway. Based with the project of rural highway in Tongchuan Shaanxi province, the paper studies the mechanism of interlocking blocks, design of the pavement, and construction technology for field application. After one year service for open traffic, the interlocking block pavement is shown to have fascinating economy and service performance for the rural road.
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Liu, Shen, Jingshu Zhang, Le Liu, Hang Guo, and Bo Wang. "Compressive performance of new types of load-bearing horizontal-hole interlocking concrete hollow blocks." Advances in Structural Engineering 22, no. 6 (November 29, 2018): 1368–83. http://dx.doi.org/10.1177/1369433218813472.
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Two series of load-bearing horizontal-hole interlocking hollow concrete blocks, referred to as H-shaped series and cross-shaped series, were developed, including three geometric types: type BH-290 (H-shaped), type BH-240 (H-shaped), and type BC-240 (cross-shaped). The research presented in this article investigated the compressive behavior of the proposed load-bearing horizontal-hole interlocking hollow concrete blocks and aimed at analyzing the influence of geometric parameters on the block capacity. First, compressive tests of the horizontal-hole interlocking hollow concrete blocks were carried out. The compressive strength, elastic modulus, and compressive failure mechanism were analyzed. Second, the feasibility of the finite element analysis model was verified by experimental results presented in this article, as well as by available test data from other researchers. The influences of vertical ribs, horizontal ribs, and concrete strength on the compressive strength of horizontal-hole interlocking hollow concrete blocks were investigated. Ultimately, based on the numerical modeling results, linear equations were proposed to predict the compressive strength of H-shaped series and cross-shaped series blocks. The results show that the compressive strengths of types BH-240, BH-290, and BC-240 are 15.9, 13.4, and 13.0 MPa, respectively. For the H-shaped series, the core horizontal rib is the key part that can significantly constrain the vertical ribs so that the block can achieve higher compressive bearing capacity. For the cross-shaped series, core horizontal ribs cannot improve the compressive strength of the block because core horizontal ribs and joints near them become damaged early. Improving the concrete strength and the width of the vertical rib can effectively improve the compressive bearing capacity for both H-shaped and cross-shaped series blocks. The accuracy of the proposed equations for predicting the compressive strength of H-shaped and cross-shaped blocks is acceptable, according to the current verification.
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Pianchaiyaphum, Sawitri, Suphaphat Kwonpongsagoon, Premrudee Kanchanapiya, and Chakrapan Tuakta. "Recycling of Non-metallic Residue from Waste Printed Circuit Boards to Produce Interlocking Concrete Blocks." International Journal of Environmental Science and Development 12, no. 6 (2021): 169–74. http://dx.doi.org/10.18178/ijesd.2021.12.6.1336.
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The process of copper recovery from waste printed circuit board has generated large amounts of non-metallic fraction (NMF) residue. In this research, the residue was recycled as a substitute for fine aggregates at 0%, 5%, 10%, 15%, and 20% to produce interlocking concrete blocks. Properties of the interlocking concrete blocks produced in this study, such as density, water absorption, compressive strength, were firstly examined and the selected mixes were further evaluated for the heavy metal leachability. The results indicated that the NMF residue affected physical, mechanical and chemical properties of NMF interlocking concrete block samples. When increasing NMF contents, the density and compressive strength decreased, while the water absorption increased. In the leachability results, the leaching of Cu decreased as cement content increased, and its concentration level was well below the Soluble Threshold Limit Concentration limit (STLC). Thus, the high content of Cu and all other metals embedded in the NMF material were immobilized in the interlocking concrete block specimens.
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Tomenio, Francia H. "Mortarless Interlocking Hollow Blocks: An Innovation." International Journal of Emerging Trends in Engineering Research 8, no. 7 (July 25, 2020): 3804–10. http://dx.doi.org/10.30534/ijeter/2020/145872020.
Full textDissertations / Theses on the topic "Interlocking blocks"
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Khor, Han Chuan. "Mechanical and structural properties of interlocking assemblies." University of Western Australia. School of Civil and Resource Engineering, 2008. http://theses.library.uwa.edu.au/adt-WU2009.0026.
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A novel way to ensure stability of mortarless structures topological interlocking is examined. In this type of interlocking the overall shape and arrangement of the building blocks are chosen in such a way that the movement of each block is prevented by its neighbours. (The methodological roots of topological interlocking can be found in two ancient structures: the arch and the dry stone wall.) The topological interlocking proper is achieved by two types of blocks: simple convex forms such as the Platonic solids (tetrahedron, cube, octahedron, dodecahedron and icosahedron) that allow plate-like assemblies and specially engineered shapes of the block surfaces that also allow assembling corners. An important example of the latter so-called Osteomorphic block is the main object of this research with some insight being provided by numerical modelling of plates assembled from tetrahedra and cubes in the interlocking position. The main structural feature of the interlocking assemblies is the need of the peripheral constraint (for the Osteomorphic blocks this requirement can be relaxed to uni-directional constraint) to keep their integrity. We studied the least visible constraint structure internal pre-stressed cables which run through pre-fabricated holes in Osteomorphic blocks. It is shown that the pre-stressed steel cables can provide the necessary constraint force without creating appreciable residual stresses in the cables, however the points of connection of the cables are the weakest points and need special treatment. The main mechanical feature of the interlocking structures is the absence of block bonding. As a result, the blocks have a certain freedom of translational and rotational movement (within the kinematic constraints of the assembly) and their contacts have reduced shear stresses which hampers fracture propagation from one block to another. These features pre-determine the specific ways the interlocking assemblies behave under mechanical and dynamic impacts. These were studied in this project and the following results are reported. As the blocks in the interlocking structure are not connected, the main issue is the bearing capacity. The study of the least favourable, central point loading in the direction normal to the structure shows elevated large-scale fracture toughness (resistance to fracture propagation). However when the central force imposes considerable bending the generated tensile membrane stresses assist fracturing of the loaded block. Prevention of bending considerably enhances the strength therefore the most efficient application of the interlocking structures would be in protective coatings and covers. Furthermore, proper selection of the material properties and the interface friction can increase the system overall strength and bearing capacity. The results of the computer simulations suggest that both Youngs modulus and the friction coefficient are the key parameters whose increase improves the bearing capacity of topologically interlocking assemblies.
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Kennedy, Nicholas Edwards. "Seismic Design Manual for Interlocking Compressed Earth Blocks." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1049.
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Seismic Design Manual for Interlocking Compressed Earth Blocks
Nicholas Edwards Kennedy
This thesis presents a comprehensive seismic design manual to be used to design and construct simple Interlocking Compressed Earth Block (ICEB) structures in seismically active regions. ICEBs are earth blocks made primarily of soil and stabilized with cement. They have female and male stud mechanisms designed to interlock when stacked, eliminating the need for mortar. The blocks can accept reinforcement and grout after they are placed. While ICEB construction is similar to conventional masonry construction, current design code standards for masonry only partially capture the actual behavior of ICEB structures. This thesis seeks to supplement the existing masonry design procedures and tailor them for use with ICEBs.
Additionally, this paper presents a preliminary design of ICEB shear walls for a disaster reconstruction project in the Philippines. While many structures in Southeast Asia and the Malay Archipelago are constructed from earthen blocks, very few are engineered. Of those that are, a lack of formal design guidance specific to ICEB construction leaves most engineers and designers with conventional concrete masonry design practices, some of which are not applicable for use with ICEBs.
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Deumic, Emina, and Damir Sadic. "FE analysis of interlocking C3C solid concrete blocks without casting." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-12051.
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Solid concrete Lego blocks can be used as temporary retaining wall systems or as wall separators between different materials such as sand, salt, compost, etc. The advantage of concrete blocks is that you can create temporary constructions. It is easy to move or expand the constructions when no casting is required between the blocks. The purpose of this study is to make models in the Finite Element (FE) software Abaqus/CAE that can be used for calculations of the capacity for interlocking blocks. FE method is an approximate method for solving differential equations. As the concrete blocks are stacked without casting, it is important to find out the construction’s load capacity when it is subjected to a horizontal load. Several types of structures have been modeled in the FE program Abaqus/CAE. These FE models were created with boundary conditions consisting of springs and a pinned connection that allows rotation.The evaluation has been focused on rotating the interlocking blocks. With the help of the FE models, reaction forces have been calculated. The FE results in term of reaction forces have been compared with hand calculations made for the same models. Moreover, a wall and a wall with lateral supports have been simulated to determine the horizontal reaction force for the interlocking concrete blocks.Massiva Lego betongblock kan ändvänds som tillfälliga stödmurar eller vägg avskiljare för olika material som salt, kompost, sand mm. Fördelen med betongblocken är att man kan skapa tillfälliga konstruktioner. Det är lätt att flytta eller bygga ut konstruktionen när ingen fog krävs mellan blocken. Syftet med denna studie är att skapa modeller i Finita Element (FE) programmet Abaqus/CAE som kan senare användas för beräkning av kapaciteten för sammankopplade block. FE Metoden är en approximativ metod för att lösa differential ekvationer. Eftersom betongblocken är staplade på varandra utan fog är det viktigt att ta reda på konstruktionens lastupptagnings förmåga när den är belastade med horisontalkrafter. Flera typer av konstruktioner har modellerats i FE programmet Abaqus/CAE. Dessa FE modeller har skapats med randvillkor som består av fjädrar och fasta lager som tillåter rotation. Utvärderingen har gjorts med fokus på vältningen i betongblocken. Med hjälp av dessa FE modeller har reaktionskraften tagits fram. FE resultaten i form av reaktionskrafter har sedan jämförts med handberäkningar gjorda för samma modeller. Vidare har en vägg och en vägg med sidostöd FE modellerats för att utvärdera horisontala deformationsegenskaper.
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Pringle, Sean Anthony. "Diagonal Tension Testing of Interlocking Compressed Earth Block Panels." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1588.
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This thesis examines the use of diagonal tension (shear) testing to determine factors affecting shear strength of Interlocking Compressed Earth Block (ICEB) panels. This work expands on the current information available about strength properties of ICEB assemblies, which are dry-stacked, as opposed to having mortared beds. Variables such as block strength, grout strength and grouting pattern can influence the results of these types of tests and are examined in this investigation.
To study variables affecting diagonal shear strength, 9 panels were tested, consisting of blocks produced by a manual block press. Strength testing was adopted from common ASTM standards to determine constituent material properties. A modified version of ASTM E519 test procedure is used to perform diagonal tension testing. Imaging analysis, using a high resolution camera, was run simultaneously during testing to capture displacement histories of select panels.
It was determined that both block and grout strength significantly affect the shear strength of ICEB panels. Additionally, vertical grouting and block type also have a strong influence. Imaging analysis results confirm that the dominant failure mode in ICEB panels is bed joint sliding both pre and post peak load, with noticeable displacements at head joint locations on a few panels. Lastly, diagonal cracking along the block face was noticeable on several panels following peak load. Further testing remains to determine other factors affecting shear strength, namely, the application of normal pre-compression loads to the panel.
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Bowdey, Thomas S. "Lap Splice Development Length of Rebar in Stabilized Hollow Interlocking Compressed Earth Blocks." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1720.
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This thesis investigates the tensile performance of unconfined lap splices in specimens constructed from interlocking compressed earth block (ICEB) units. All lap splice specimens were constructed from hollow ICEB half units with one side grouting channel. ICEB units used in this research were exclusively produced from the Soeng Thai Model BP6 block press. The BP6 block press is currently manufactured in Thailand under the guidance and direction of the Center of Vocational Building Technologies (CVBT). All ICEB units and grout constructed for this research were created from mix proportions of soil, sand, cement, and water. Rebar bar sizes were restricted to M10 (#3) and M13 (#4) for all lap splice specimens due to the limited area of the hollow 2-inch diameter rebar cavity of the ICEB unit. The limited size and strength of the ICEB units also made the use of larger bar diameters impractical. Three ICEB unit types of varying strengths (3.78 MPa, 7.81 MPa, and 11.38 MPa) and three grout types of varying strengths (1.35 MPa, 7.47 MPa, and 15.50 MPa) were developed and used to construct all specimens. The measured ICEB lap splice specimen strengths were compared against the predicted strength calculated from the Masonry Standards Joint Committee (MSJC). Findings suggested that the MSJC design equation did not adequately predict the lap splice strength of specimens, particularly for specimens constructed from weaker materials. The measured ICEB lap splice results were used to create a new ICEB lap splice design equation. This paper also investigates the compressive performance of fully grouted ICEB prisms constructed from the range of ICEB unit and grout strengths stated above. Findings suggested that the compressive strength of fully grouted ICEB prisms were exclusively controlled by the compressive strength of the ICEB units used to construct the prism. The strength of the grout had no discernable effect on the strength of the fully grouted prism. A design equation was proposed to calculate prism strengths based on measured strength results of ICEB units.
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NASCIMENTO, Maria Victória Leal de Almeida. "Estudo de blocos intertravados de concreto para pavimentação de resíduo do polimento do porcelanato." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/17151.
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A utilização de resíduos em materiais cimentícios, tem sido desenvolvida para melhorar a qualidade ambiental, diminuindo os resíduos gerados. O RPP é um resíduo industrial produzido em grande escala pela indústria cerâmica, ele foi utilizado nesse trabalho sendo incorporado em blocos intertravados de concreto. Os blocos intertravados de concreto foram escolhidos dentre os materiais cimentícios, por não ter sua trabalhabilidade comprometida, quando se trata de adicionar um material pulverulento, pois é produzido por vibro-compressão. Foi realizada a otimização do empacotamento dos agregados, para a produção dos blocos intertravados de concreto, através de método matemático. Também foi otimizada, através de método experimental a relação água/cimento. O traço de referência, encontrado após as otimizações, foi 1: 2,68: 2,32 (cimento: areia: pedrisco), com relação água/cimento de 0,45, atendeu as especificações da NBR 9781 (ABNT, 2013), com relação a resistência à compressão. A partir do traço de referência foi realizado o empacotamento matemático para a incorporação do RPP. O resíduo foi considerado como agregado no empacotamento, ele foi incorporado nas seguintes porcentagens: 3% de RPP, 6% de RPP, 9% de RPP, e 12% de RPP, afim de avaliar a influência do resíduo nos blocos intertravados de concreto, nas propriedades do estado endurecido. A presença do RPP, reduziu a absorção de água tendendo a trazer para o admitido pela NBR 9781 (ABNT, 2013), manteve a resistência a abrasão de acordo com as especificações da NBR 9781 (ABNT, 2013), embora tenha prejudicado a resistência a compressão, sendo promissor a sua utilização, em blocos intertravados de concreto, em situações onde não há tráfego de veículos, como em: passeios públicos, praças, parques infantis, áreas que necessitem de drenagem. O traço com a incorporação do resíduo, que de uma forma geral obteve os resultados mais satisfatórios foi o traço 2 (3% RPP), que apesar da resistência à compressão média ter sido de 14,26 MPa menor que o especificado pela norma, apresentou uma taxa de absorção média de 6,60%, e em relação a resistência à abrasão apresentou uma cavidade média de 17,50 mm.
To incorporate residues in cimentitious materials has been developed to improve the environmental quality, reducing the amount of disposed residues. The ceramic porcelain industry generates a large amount of porcelain tile polishing residue. This work proposes to incorporate this tile polishing residue in concrete interlocking blocks. The concrete interlocking blocks were chosen due to the addition of a powder material not prejudice their workability, once they are molded by vibrocompression. It was determined the best packaging by a mathematical method. The water-cement ratio was also optimized by the experimental method. The achieved reference mix proportion after all optimizations was 1:2.68:2.32 (cement: sand: gravel) with ratio water-cement ratio 0.45. The compressive strength of the reference mix proportion is according to the NBR 9781 (ABNT, 2013). In the sequence, based on this reference mix, the incorporation of the residue was also mathematically optimized. The residue was considered as an aggregate on the packaging method. The residue was incorporated at the following percentages: 3%, 6%, 9% and 12% in order to evaluate its influence on the hardened state properties of the concrete interlocking blocks. The presence of the tile polishing residue reduces the water absorption, tending to bring the values to the admitted one by the NBR 9781. The abrasion resistance was in agreement with the NBR 9781 (ABNT, 2013). However, the compressive resistance was reduced, limiting the applications of the concrete interlocking blocks with the addition of tile polishing residue where there is no vehicle traffic, as in public footpaths, parks, playgrounds or areas requiring drainage. In a general way, the most satisfactory result among the evaluated mixes incorporating tile polishing residue was to the mix 2 (3% of residue). Despite the average compressive strength was 14.26 MPa lower than the specified by the standard, this mix presented the average absorption of 6.60% and 17.50 mm as a medium cavity liner in the abrasion resistance test.
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ALCANTARA, Paloma Santos Xavier de. "Blocos intertravados coloridos para pavimentação com incorporação de resíduos de cerâmica vermelha em prol da redução de pigmentos." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/16647.
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CAPES
Peças de concreto intertravadas para pavimentação (pavers) coloridas com pigmento de óxido de ferro (vermelho) são utilizadas em projetos de urbanização. Entretanto, esse tipo de pigmento, além de encarecer de 20 a 30% o valor das peças, prejudica as propriedades dos concretos secos moldados sob vibrocompressão. Diante disso, propõe-se incorporar resíduo de cerâmica vermelha (RCV) como matiz colorimétrica em prol da redução de pigmento em pavers coloridos, tendo em vista também a possibilidade de melhoria de suas propriedades por efeitos filler e pozolânico. A fim de investigar o efeito do pigmento e do RCV no compósito estudado, as formulações foram: (a) traço padrão pelo método de dosagem da ABCP para blocos e pavers; (b) adição de pigmento ao traço padrão (2% e 4%); (c) substituição da areia média pelo RCV no traço padrão (50%, 75% e 100%); (d) adição de RCV ao traço padrão (20%, 30%, 40% e 50%); (e) adição de pigmento (2%) e RCV concomitantemente ao traço padrão (20%, 30%, 40%, 50%, 100% e 150%). Para todos os traços (exceto aqueles das formulações de substituição), foi feita a correção do consumo de cimento em relação ao traço padrão. Resistência à compressão, absorção de água e resistência à abrasão foram avaliadas de acordo com a norma NBR 9781:2013; além disso, foi realizada uma avaliação das cores dos compósitos desenvolvidos por inspeção visual. Pastas de cimento vibroprensadas com baixa relação água-cimento (padrão, 3% pigmento, 15% RCV e 3% pigmento – 15% RCV) também foram moldadas para avaliações de cunho microestrutural, cristalográfico e de análise térmica das reações de hidratação dos sistemas. O traço padrão foi 1:2,29:1,76:0,95 (cimento:areia média:areia muita grossa:pedrisco) com relação água-materiais secos 0,80. De uma maneira geral, adições de apenas pigmento (2% e 4%) reduziram em até 73% a resistência à compressão do paver padrão cinza (sem adições). Redução nos produtos de hidratação (CH e C-S-H) foram observadas. As substituições de areia média pelo RCV também foram prejudiciais a esse sistema. Já as adições de apenas RCV, bem como as de RCV concomitantemente com pigmento foram positivas em ganhos ou manutenção de propriedades (resistência à compressão, absorção de água, resistência à abrasão e cor) em relação ao paver padrão colorido (4% de pigmento), destacando-se a formulação 2% de pigmento e 50% de RCV. Assim, a adição de RCV é uma possibilidade técnica promissora, sustentável e economicamente viável na fabricação de pavers avermelhados.
Concrete interlocking blocks colored with pigment iron oxide (red) are used in urbanization projects. However, that kind of pigment increases around 20 to 30% the value of the pavers, as well as affect the properties of the dry concrete molded by vibrocompression. Therefore, it is proposed to incorporate red ceramic waste (RCW) as colorimetric hue in order of pigment content reduction in colored pavers, considering also the possibility of improving their properties by filler and pozzolanic effect. In order to investigate the effect of pigment and RCW in the studied composite, the formulations were: (a) reference paver designed by ABCP method for blocks and pavers; (B) adding pigment to the reference paver (2% and 4%); (C) substitution of medium sand by RCW in the reference paver (50%, 75% and 100%); (D) adding RCW in the reference paver (20%, 30%, 40% and 50%); (E) addition of pigment (2%) and RCW concurrently in the reference paver (20%, 30%, 40%, 50%, 100% and 150%). For all mixtures (except those of replacement formulations), it was made the correction in cement consumption related to the reference mix proportion. Compressive strength, water absorption and abrasion resistance were measured according to the ABNT NBR 9781: 2013 standards; besides that, the color and texture of all manufactured formulations were observed by visual inspection. Cement pastes made by vibrocompression with low water-cement ratio (reference paste, 3% pigment, 15% RCW and 3% pigment RCW - 15% RCW) were also molded for microstructural, crystallographic and thermal analysis of systems hydration reactions. The reference mix proportion was 1:2.29:1.76:0.95 (cement: medium sand: thick sand: gravel) with ratio water-dry material 0.80. In general, additions of only pigment (2% and 4%) up to 73% reduced the compressive strength of the reference paver (no additions). Reduction in hydration products (C-S-H and CH) was observed. The substitution formulations of medium sand by RCW were also harmful to the systems. Additions of only RCW and RCW concomitantly with pigment were positive in gains or maintaining of properties (compressive strength, water absorption resistance and abrasion resistance) compared to the reference colored paver (4% pigment), especially the formulation of 2% pigment and 50% RCW. Thus, the addition of RCW is a promising, economic and sustainable technique in the production of red pavers.
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Oliveira, Cinara Souza de. "Análise comparativa técnico-econômica entre os pavimentos de concreto asfáltico e blocos intertravados de concreto." Universidade do Vale do Rio dos Sinos, 2018. http://www.repositorio.jesuita.org.br/handle/UNISINOS/7422.
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Esta dissertação tem por objetivo comparar economicamente o pavimento de concreto asfáltico e de blocos intertravados de concreto na pavimentação urbana da Avenida Severo Dullius, considerando os custos das soluções propostas pelos métodos. A avenida em estudo é uma das principais vias radiais que compõe o anel viário que dá acesso ao Aeroporto Internacional Salgado Filho, é tida como essencial dentro do plano de mobilidade urbana do município de Porto Alegre/RS, localizada em zona urbana alagadiça, com subleito constituído de solos de baixo poder de suporte e tráfego comercial pesado. O dimensionamento foi realizado para um trecho 2,3 Km e, contou com estudos geotécnicos, com intuito de caracterizar física e mecanicamente o solo do subleito, considerou-se a contagem e classificação do tráfego atuante na via. Em seguida, foi analisado o comportamento estrutural desses pavimentos urbanos na referida situação e apresentados os métodos construtivos adequados e recomendados. Aplicou-se para o pavimento em concreto asfáltico o método de dimensionamento de pavimento flexíveis – DNER atual DNIT, e para o bloco intertravado de concreto empregou-se o método da ABCP (1998). Para permitir a comparação técnica e financeira entre os pavimentos, foram consideradas suas características estruturais e os respectivos períodos de projetos. Contabilizaram-se os custos da implantação e da conservação. Com os orçamentos disponíveis, efetuou-se uma comparação de serviços com o objetivo de identificar sua viabilidade econômica, propondo o assim o pavimento adequado para a via selecionada. Concluiu-se que para este estudo a utilização do bloco intertravado de concreto como solução final em função do custo comparado, apresentou-se uma economia de 16,93% no custo final da implantação, portanto economicamente mais vantajosa em relação ao concreto asfáltico. Diante disto, concluiu-se também, que uma análise econômica de um pavimento rodoviário, deve-se sempre abordar todos os custos e benefícios pertinentes, considerando todas as fases de sua implantação.
This dissertation aims to compare economically the asphalt concrete and interlocking concrete blocks in the urban paving of Severo Dullius Avenue, considering the costs of the solutions proposed by the methods. The avenue under study is one of the main radial roads that makes up the ring road that accesses the Salgado Filho International Airport, and it is considered imperative to the urban mobility plan of the city of Porto Alegre / RS, located in and urban swamp area, with subsoil consisting of low support power soils and heavy commercial traffic. The sizing was carried out for a 2.3 km stretch, and it was based on geotechnical studies in order to physically and mechanically characterize the subsoil soil, considering the counting and classification of the traffic acting on the road. Next, the structural behavior of these urban pavements in the mentioned situation was analyzed and the suitable and recommended construction methods were presented. The method of sizing of flexible pavement – DNER current DNIT was applied to the asphaltic pavement, and the ABCP (1998) method was used for the interlocked block of concrete. In order to allow the technical and financial comparison between the floors, their structural characteristics and the respective project periods were considered. The costs of implementation and conservation were taken into account. With the budgets available, a comparison of services was carried out in order to identify their economic viability, thus proposing the adequate pavement for the selected route. It was concluded for this study that, as a final solution, the use of the interlocked concrete block compared with the concrete, showed a saving of 16,93% in the final cost of the implantation, thus economically more advantageous in relation to the asphalt concrete. In view of this, it was also concluded that an economic analysis of a road pavement should always address all relevant costs and benefits, considering all phases of its implementation.
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Marchioni, Mariana Lobo. "Desenvolvimento de técnicas para caracterização de concreto seco utilizado na fabricação de peças de concreto para pavimentação intertravada." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-18072013-150832/.
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O concreto seco, também chamado de concreto sem abatimento (no-slump) é utilizado na produção de artefatos de cimento, como por exemplo em peças de concreto para pavimentação, blocos para alvenaria e tubos de concreto e ainda como camada de subbase de pavimentos com a técnica de concreto compactado a rolo. A técnica de conformar concretos com reduzido teor de umidade através de equipamentos que aplicam simultaneamente compressão e vibração é amplamente utilizada na produção de artefatos de concreto, como as peças de concreto para pavimentação intertravada. Para as peças de concreto o desafio é ainda maior, pois as especificações de resistência característica à compressão podem chegar a 50 MPa. A principal característica do concreto seco é o baixo teor de água e elevada coesão, necessitando de energia de compactação e vibração para a eliminação de vazios e o concreto assumir a forma desejada. Esta técnica permite a desfôrma imediata, que garante elevada produtividade e consequente diminuição dos custos de produção. Já a compactação permite obter componentes de concreto com menor consumo de cimento se comparados ao concreto plástico. Diferentemente de toda literatura e metodologias de dosagem encontradas para o concreto plástico, o concreto seco encontra barreiras técnicas para a aplicação de metodologias que otimizem sua dosagem, em formulações empíricas que não levam em conta de forma adequada as características dos agregados, características estas diretamente ligadas à compacidade das peças, que por sua vez tem grande influência nas características do produto final. Além disto, há poucos estudos do comportamento reológico do concreto seco, que influenciam a fluidez e coesão da do concreto e que irão determinar a produtividade e qualidade da produção. Dessa forma, neste trabalho é apresentado uma metodologia para caracterização do concreto seco nos estados fresco e endurecido que permite o desenvolvimento sistemático de formulações com maior facilidade de compactação e que também resulte na melhoria do desempenho das peças e diminuindo a necessidade de testes em escala real. O método se baseia em produzir em laboratório um corpo de prova que reproduz as condições de moldagem de uma vibroprensa, eliminando-se a variável da vibração e padronizando as condições de compressão. Nos corpos-de-prova são avaliadas características nos estados fresco e endurecido, além de aspectos do comportamento reológico do concreto, através de técnicas de reologia compressiva. Para aferir a metodologia foram utilizadas amostras de referência produzidas em uma fábrica de peças de concreto. Com a metodologia proposta, foi possível atingir 90% da resistência mecânica das peças produzidas em uma vibroprensa de alta compactação. Sendo assim esta metodologia poderá ser utilizada em estudos de dosagem de concreto seco, portanto o trabalho desenvolvido é indicado na utilização de dosagens de concreto seco, obtendo-se maior ecoeficiência, a medida que otimiza o consumo de cimento da mistura e facilita o estudo de dosagem de materiais alternativos em substituição aos agregados convencionais.The dry concrete, also known as earth moist concrete or no-slump concrete, is most used to manufacture precast concrete products, as paving blocks, masonry blocks and concrete tubes, and also in rolled compacted concrete pavement. Its most important property is the low water content, and it requires mechanical equipment for its compactation. Paving blocks are normally manufactured using vibrocompression equipment, which at the same time applies both compaction and vibration resulting in paving blocks with high durability and mechanical resistance. Even though this technique is highly used it still lacks studies on some important steps of the manufacturing process. The mix design techniques are mostly empirical and dont deeply consider the aggregate characteristics, that are connected with its compacity and, by that, the characteristics of the paving block. Also, there are only a few studies of the rheology characteristics of dry concrete, which relates with de manufacturing process and the easiness that the mix is compacted. So, the object of this study is to develop a dry concrete characterization methodology that allows the systematic development of mix designs that are easily compacted and also improves the performance of the paving blocks.
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Bland, David William. "In-Plane Cyclic Shear Performance of Interlocking Compressed Earth Block Walls." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/495.
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This thesis presents results from testing of interlocking compressed earth block (CEB) masonry shear walls. CEBs are low strength earth masonry units sometimes stabilized with cement or lime. The interlocking compressed earth blocks (ICEBs) used in this experiment are dry stacked interlocking hollow units, which can be reinforced and grouted after they are laid. Although significant research has been undertaken to optimize the material properties of CEBs, little has been done to investigate the performance of structural systems currently being built using this technology.
Test results are reported for three 1800 mm x 1800 mm wall specimens constructed with cement stabilized ICEBs and subjected to cyclic in-plane lateral loading. Wall specifications were varied to identify the shear performance of partial and fully grouted walls, and to observe the performance of a flexure dominated wall panel. It was determined that the shear strength of fully grouted walls is significantly higher than that of partially grouted walls and calculation of capacity based on current ACI 530-08 masonry provisions significantly overestimates the shear strength of ICEB wall panels. Based on the observed performance, recommendations are made for limiting the calculated nominal shear strength in design. Results also indicate that calculations based on simple bending theory conservatively predict the flexural strength of a fully grouted ICEB wall. Discussion of ICEB material properties and recommendations for design and construction procedures are included.
Books on the topic "Interlocking blocks"
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Pérez-Peña, Adrián Mauricio. Interlocking stabilised soil blocks: Appropriate earth technologies in Uganda. Nairobi: UN HABITAT, 2009.
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Design and construction of interlocking concrete block pavements. London: Elsevier Applied Science, 1990.
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Hardy, Duncan. The ‘Town War’, c. 1376–89. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198827252.003.0010.
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Part III of this book examines four case studies in late medieval Upper German history through the lens of associative political culture in order to demonstrate its utility as an analytical and explanatory concept. The first is the series of interlocking feuds in the 1370s and 1380s known in German historiography as the ‘Town War’. This has traditionally been viewed as an anarchic conflict between two monolithic and inherently polarized blocs of free and imperial cities on the one hand and nobles and princes on the other. Through a ‘thick description’ of the complicated military and arbitrational activities of the 1370s and 1380s, this chapter shows that they can more accurately be understood in terms of the shared repertoire of associative formats and practices that were prevalent in Upper Germany. Far from being chaotic and irrational, the conflicts and negotiations played out according to the principles of associative political culture.
Book chapters on the topic "Interlocking blocks"
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Vivek Prasad, H. G., and K. S. Jagadish. "Interlocking in Mud Blocks for Improved Flexural Strength." In Earthen Dwellings and Structures, 153–62. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-5883-8_14.
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Sudhakar, M., George M. Varghese, and C. Natarajan. "Performance Studies on Geopolymer Based Solid Interlocking Masonry Blocks." In Advances in Structural Engineering, 1687–701. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2187-6_128.
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Fallacara, Giuseppe, Maurizio Barberio, and Micaela Colella. "Topological Interlocking Blocks for Architecture: From Flat to Curved Morphologies." In Architectured Materials in Nature and Engineering, 423–45. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11942-3_14.
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Marathe, Shriram, I. R. Mithanthaya, and S. K. Susmitha. "Investigations on Slag-Fly Ash-Glass Powder Based Ecofriendly Interlocking Paver Blocks." In Lecture Notes in Civil Engineering, 381–94. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2826-9_25.
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Gannoruwa, G. K. B. M., S. M. A. Nanayakkara, and S. S. K. Muthurathna. "Utilization of Textile Waste in Development of Interlocking Paving Blocks for Foot Paths." In Lecture Notes in Civil Engineering, 543–54. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7222-7_44.
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Cerqueira, Niander A., Victor B. Souza, Igor W. D. C. Pereira, Rondinelli C. Ribeiro, Afonso G. Azevedo, Mairyanne S. Souza, and Victor T. Bartolazzi. "Production of Concrete Interlocking Blocks with Partial Replacement of Sand in Bulk by Waste Glass Machined." In Characterization of Minerals, Metals, and Materials 2017, 719–27. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51382-9_79.
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Zhang, Yinan, and Devin Balkcom. "Interlocking Block Assembly." In Springer Proceedings in Advanced Robotics, 709–26. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44051-0_41.
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Vinay, Y. N., K. Srinivas, M. V. Renuka Devi, and S. M. Basutkar. "Analysis of Interlocking Block Masonry." In Lecture Notes in Civil Engineering, 635–46. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6969-6_55.
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Nguyen-Ngoc, Hau, Bao-Loi Dang, Hung Nguyen-Xuan, Hoang Duc Thao, and Magd Abdel Wahab. "Topology Optimization of an Interlocking Revetment Block." In Proceedings of the 1st International Conference on Numerical Modelling in Engineering, 165–76. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2405-5_14.
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Nguyen-Ngoc, Hau, Bao-Loi Dang, Hung Nguyen-Xuan, Hoang Duc Thao, and Magd Abdel Wahab. "Three-Dimensional Analysis of an Innovative Hollow Concrete Block of Interlocking Revetment." In Proceedings of the 1st International Conference on Numerical Modelling in Engineering, 112–22. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2405-5_9.
Full textConference papers on the topic "Interlocking blocks"
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S, Anjana, Diya Elizabeth Isaac, Neelanjana S, and Aswathy G. "Interlocking Pavement Tiles using RCA with Industrial Waste as Admixtures." In International Web Conference in Civil Engineering for a Sustainable Planet. AIJR Publisher, 2021. http://dx.doi.org/10.21467/proceedings.112.52.
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The unprecedented increase in construction and developmental activities in the current era brings with it many irreversible impacts on the environment. The major impacts being the depletion of natural resources and generation of an enormous quantity of Construction and Demolition (C&D) wastes. Hence it has become important to reuse and recycle C & D wastes generated. These wastes can be processed to obtain Recycled Concrete Aggregates (RCA), which can be used for producing recycled concrete. It was found that the strength of Recycled concrete matches with that of paver quality concrete. Therefore, the study aims at producing interlocking paver blocks by replacing the normal coarse aggregates in pavers by RCA along with fly ash as admixture, an industrial waste. Fly ash being a pozzolanic admixture is used in order to overcome the loss of strength due to the addition of RCA. In the present study, a 30% replacement of normal aggregates with RCA and 15% replacement of cement with fly ash in the mix was used as it was found to provide the optimum strength. A comparison of the important properties of paver blocks were conducted between normal concrete pavers, pavers with RCA replacement and pavers with RCA replacement and fly ash. It was found out from the study that Interlocking pavers with partial replacement of normal aggregates with RCA and fly ash obtained strength comparable to that of normal paver blocks. Hence these paver blocks can be used for laying of roads and can contribute towards a sustainable development.
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Casapulla, Claudia, and Elham Mousavian. "A HEURISTIC METHOD FOR MODELLING THE SLIDING RESISTANCE OF MASONRY ASSEMBLAGES OF INTERLOCKING BLOCKS." In 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2019. http://dx.doi.org/10.7712/120119.6952.19547.
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Georgiadis, Sofia K., and Andrew Comba. "Enterprise Architecture: System and Management Framework for NYCT Vital Systems." In 2013 Joint Rail Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/jrc2013-2420.
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The concept of operations for NYCT systems is changing as a result of Automatic Train Supervision (ATS) Communications-Based Train Control (CBTC), and Solid State Interlocking (SSI) deployment. Train dispatchers are dealing with a higher degree of automation with ATS systems; and similarly, train operators are adjusting to a split between automated and manual processes with CBTC systems. The emerging CBTC and SSI systems are becoming Information Technology (IT) infrastructure and digital-control based. While CBTC is increasing the overall safety of the signaling system, it is also increasing system complexity, especially from an analysis point of view. These issues are addressed at NYCT by the implementation of DoDAF, which the U.S. Department of Defense Architecture Framework, an Enterprise Architecture. This paper discusses VSI’s application of DoDAF with a focus on the safety certification mission. It begins with an overview of DoDAF, followed by a description of Views and Product-models, the building blocks of DoDAF. Each section presents a high-level description of each View, along with exemplary Product-model descriptions, 1 or 2 per View. In addition, two system capability requirements, Safe Train Separation and Control Speed to Restriction Limits, are examined and mapped throughout the model.
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Sieglen, Jr., Walter E., and Harald von Langsdorff. "Interlocking Concrete Block Pavements At Howland Hook Marine Terminal." In Ports Conference 2004. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40727(2004)131.
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Thomson, Malcolm, and John Sims. "A Temporary Store for Radioactive Waste." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4719.
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To provide an efficient process for the final disposal of radioactive wastes, some nuclear sites are currently building suitable, temporary stores for such material. This paper describes the practical construction programme recently completed at a UK power reactor site under decommissioning. This site has a number of half height ISO containers filled with solid radioactive material that needed a temporary storage area before being consigned for final disposal. As a result, the site, Hunterston A Decommissioning Site, needed to construct some temporary radiation shield walls to contain the half height ISO containers (HHISO) and safeguard staff and public during the storage period. The chosen location of the temporary store was the Charge Machine Maintenance Building (CMMB), which was surplus to requirements during the decommissioning programme, providing a weatherproof environment. Following an in-depth study of the different forms of construction available, the commercially available, hollow, interlocking polyethylene block system was adopted. Because of its modular form, it has the advantage that it can to be dismantled and re-used at other locations, if required. Being hollow, the block could be filled with a variety of materials, such as water, sand, lead or iron shot, depending on the radioactive shielding needs. An important aspect of the modular plastic block was that it could be more easily installed, decontaminated and decommissioned than the cheaper concrete block system, which produces copious quantities of waste for disposal. This paper describes the choice of interlocking block shielding after comparisons with more conventional forms of construction, the features of the HHISO store design, the short duration building programme and the on-site experiences of the construction period.
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Ma, Songlin, Xiangshen Hou, and Dayong Wu. "Research on Structural Design of Interlocking Concrete Block Pavement for Rural Road." In Ninth International Conference of Chinese Transportation Professionals (ICCTP). Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41064(358)355.
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Fraser, Cameron. "Evolutions in Railway Signaling: A “New Age” of Control?" In 2009 Joint Rail Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/jrc2009-63027.
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The development of railroad signaling systems evolved with the need to provide interlocking between points and signals, and block working to keep trains a safe distance apart. Accordingly, the archetypal behavior of train control is summed up as providing (1) safe and efficient train movement by (2) the management of train routing and separation. This has been rudimentary since the advent of railway signaling and propagated in even the most contemporary of technologies today.
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Zafar, Nazir. "Formal model for moving block railway interlocking system based on un-directed topology." In 2006 International Conference on Emerging Technologies. IEEE, 2006. http://dx.doi.org/10.1109/icet.2006.335983.
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Zhou, Yumin, Zhiming Tan, and Honglong Hu. "Structural Responses of Port Interlocking Concrete Block Pavements Based on a Three-Dimensional Mechanistic Model." In Geo-Shanghai 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413418.021.
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Bailey Dudley, Eleanor, Lei Liu, Robert Sarracino, and Rocky Taylor. "Using Discrete Element Model to Simulate Keel-Gouging: A Sensitivity Analysis." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62479.
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A three-dimensional discrete element model is under development to simulate a number of different keel-gouge and subsea interaction scenarios. The model is being validated against controlled tests conducted in the National Research Council’s ice tank facility under the Pipeline Ice Risk and Mitigation (PIRAM) Joint Industry Project, which was led by C-CORE on behalf of a number of oil and gas companies. To investigate the influence of certain key parameters on the failure behaviour of the keel, a sensitivity analysis has been carried out. Best results were achieved when Young’s modulus of the keel was 5 MPa, the shear-to-tensile ratio of the freeze bonds was set to 1.2, the internal friction angle of the ice was 9°, the bond breakage ratio 0.8 % and Young’s modulus of the gravel 0.01 MPa. A low modulus for the gravel was needed to prevent premature failure of the keel, a consequence of the model not accounting for soil deformations. Using these parameters the model was able to accurately reproduce the loads on the soil tray during peak loading. Future developments in the model include using ‘clumps’ to give more representative ice block shapes, which will allow interlocking between ice pieces and the development of force chains.
Reports on the topic "Interlocking blocks"
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Morrow, Ruth, Peter Martin, and Chantelle Niblock. Expanding the upcycling paradigm: a case study in the creative use of waste streams and waste plastic in interlocking blocks. University of Limerick, 2021. http://dx.doi.org/10.31880/10344/10255.
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