Relevant bibliographies by topics / Lightweight concrete

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Lightweight concrete'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Lightweight concrete"

1

Zach, J., J. Bubeník, and M. Sedlmajer. "Development of lightweight structural concrete with the use of aggregates based on foam glass." IOP Conference Series: Materials Science and Engineering 1205, no. 1 (November 1, 2021): 012014. http://dx.doi.org/10.1088/1757-899x/1205/1/012014.

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Abstract Lightweight concretes are increasingly being used in the construction industry, either for the overall lightweighting of the structure itself, reducing material consumption for construction and thus CO2 emissions, or for specific reasons such as improving the thermal insulation properties of the structure or acoustic properties. Today, lightweight concretes with lightweight expanded aggregates (expanded clay, agloporite) are most commonly used. This paper deals with the production of lightweight concretes lightweighted with foamed glass-based aggregates. Foamed glass is a lightweight material characterised by a very good ratio of thermal insulation and mechanical properties. Foamed glass is made of approximately 90% recycled glass waste (mostly mixed), which cannot be used in any other way, as well as water glass and glycerine. When concrete is lightened with foamed glass, these concretes achieve unique properties while conserving primary aggregate resources, avoiding landfilling of glass waste and efficiently using the waste material to produce lightweight concrete with higher added value. The paper discusses the possibilities of developing lightweight structural concretes using glass foam-based aggregates to achieve higher strength classes while reducing the weight and thermal conductivity of the concrete. As part of the research work, new types of lightweight concrete with a bulk density in the range of 1750–1930 kg/m3 and a thermal conductivity from 0.699 to 0.950 W/(m·K) were developed.
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Křížová, Klára, Jan Bubeník, and Martin Sedlmajer. "Use of Lightweight Sintered Fly Ash Aggregates in Concrete at High Temperatures." Buildings 12, no. 12 (November 29, 2022): 2090. http://dx.doi.org/10.3390/buildings12122090.

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This study addresses the issue of the resistance to high temperatures of lightweight concrete lightweighted with sintered fly ash aggregate. Lightweight concretes with different amounts of lightweighting and their properties after loading temperatures of 600, 800 and 1000 °C were investigated. In particular, the effect of high temperature on the mechanical properties of the concrete was determined on the test specimens, and the effect on the microstructure was investigated by X-ray diffraction analysis and scanning electron microscopy. It was found that there is an increase in compressive strength between 0 and 21% up to 800 °C, where the increase in strength decreases with increasing degree of lightening. At 1000 °C, the internal structure of the lightweight concrete destabilized, and the compressive strength decreased in the range of 51–65%. After loading at 1000 °C, the scanning electron microscope showed the formation of spherical-shaped neoplasms, which significantly reduced the internal integrity of the cement matrix in the lightweight concrete due to the increase in their volume. It was found that the lightweight concretes with higher lightweighting showed significantly less degradation due to higher temperature.
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Paskachev, A. B., T. G. Rzhevskaya, S. A. Stel'makh, E. M. Shcherban, L. D. Mailyan, and A. L. Mailyan. "Comparison of the effectiveness of microsilica modification of lightweight concretes with coarse aggregates from various rocks." Izvestiya vuzov. Investitsii. Stroitelstvo. Nedvizhimost 14, no. 1 (April 5, 2024): 82–95. http://dx.doi.org/10.21285/2227-2917-2024-1-82-95.

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A promising line of research in construction science and practice is the creation of lightweight concretes. They exhibit the so-called strength-density ratio, i. e. a relative characteristic between the strength and weight of the resulting concrete. This ratio simultaneously reflects the maximum possible weight reduction of the structure and its operational reliability. The research aims to compare the effectiveness of microsilica modification of lightweight concretes produced with coarse aggregates from various rocks. The study analyzed the existing scientific literature on lightweight concretes, their formulations, technology, and scientific validity, as well as the structural compatibility of the components used. A comparison was made of the effectiveness of lightweight concrete modification for various formulation technological parameters. The strength of modified lightweight concrete and its strengthdensity ratio changed significantly compared to unmodified lightweight concrete. The strongest effect is achieved when using lightweight granite concrete modified with 9 % of microsilica. As a result, the maximum compressive strength was 55.9 MPa, and the strength-density ratio was 24.3•10-3 MPa•m3/kg compared to other studied concrete compositions. The increase in compressive strength was 17.2 % compared to unmodified lightweight concrete. The strength-density ratio increased by 19.1 % compared to unmodified coarse dense aggregate concrete.
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Upasiri, Irindu, Chaminda Konthesingha, Anura Nanayakkara, Keerthan Poologanathan, Brabha Nagaratnam, and Gatheeshgar Perampalam. "Evaluation of fire performance of lightweight concrete wall panels using finite element analysis." Journal of Structural Fire Engineering 12, no. 3 (July 14, 2021): 328–62. http://dx.doi.org/10.1108/jsfe-10-2020-0030.

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Purpose In this study, the insulation fire ratings of lightweight foamed concrete, autoclaved aerated concrete and lightweight aggregate concrete were investigated using finite element modelling. Design/methodology/approach Lightweight aggregate concrete containing various aggregate types, i.e. expanded slag, pumice, expanded clay and expanded shale were studied under standard fire and hydro–carbon fire situations using validated finite element models. Results were used to derive empirical equations for determining the insulation fire ratings of lightweight concrete wall panels. Findings It was observed that autoclaved aerated concrete and foamed lightweight concrete have better insulation fire ratings compared with lightweight aggregate concrete. Depending on the insulation fire rating requirement of 15%–30% of material saving could be achieved when lightweight aggregate concrete wall panels are replaced with the autoclaved aerated or foamed concrete wall panels. Lightweight aggregate concrete fire performance depends on the type of lightweight aggregate. Lightweight concrete with pumice aggregate showed better fire performance among the normal lightweight aggregate concretes. Material saving of 9%–14% could be obtained when pumice aggregate is used as the lightweight aggregate material. Hydrocarbon fire has shown aggressive effect during the first two hours of fire exposure; hence, wall panels with lesser thickness were adversely affected. Originality/value Finding of this study could be used to determine the optimum lightweight concrete wall type and the optimum thickness requirement of the wall panels for a required application.
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Wongkvanklom, Athika, Patcharapol Posi, Banlang Khotsopha, Chetsada Ketmala, Natdanai Pluemsud, Surasit Lertnimoolchai, and Prinya Chindaprasirt. "Structural Lightweight Concrete Containing Recycled Lightweight Concrete Aggregate." KSCE Journal of Civil Engineering 22, no. 8 (November 15, 2017): 3077–84. http://dx.doi.org/10.1007/s12205-017-0612-z.

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Sedlmajer, Martin, Jiří Zach, and Jan Bubeník. "USING SECONDARY RAW MATERIALS IN LIGHTWEIGHT OPEN-STRUCTURE CONCRETE WITH GOOD UTILITY PROPERTIES." Acta Polytechnica CTU Proceedings 22 (July 25, 2019): 94–98. http://dx.doi.org/10.14311/app.2019.22.0094.

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The paper presents the results of research in lightweight concrete with open structure made using a lightweight porous foam-glass aggregate produced from recycled glass powder. The goal was to develop lightweight concrete. In order to achieve the best possible properties while reducing binder content, the concrete was reinforced with by-product fibres, which helped reduce the weight of the concrete while delivering satisfactory mechanical properties. In the paper are proposed lightweight concrete with open structure made using foam-glass aggregate. Mechanical, thermal-insulating and acoustic properties were determined on lightweight concrete. Designed concrete is only made of crushed lightweight foam-glass aggregate with a combination of Portland cement with the option of adding recycled PET fibres. The new concretes possess a very good ratio of thermal insulation to mechanical properties as well as good sound absorption.
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Thienel, Karl-Christian, Timo Haller, and Nancy Beuntner. "Lightweight Concrete—From Basics to Innovations." Materials 13, no. 5 (March 3, 2020): 1120. http://dx.doi.org/10.3390/ma13051120.

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Lightweight concrete has a history of more than two-thousand years and its technical development is still proceeding. This review starts with a retrospective that gives an idea of the wide range of applications covered by lightweight concrete during the last century. Although lightweight concrete is well known and has proven its technical potential in a wide range of applications over the past decades, there are still hesitations and uncertainties in practice. For that reason, lightweight aggregate properties and the various types of lightweight concrete are discussed in detail with a special focus on current standards. The review is based on a background of 25 years of practical and theoretical experience in this field. One of the main challenges in designing lightweight concrete is to adapt most of design, production and execution rules since they often deviate from normal weight concrete. Therefore, aspects are highlighted that often are the cause of misunderstandings, such as nomenclature or the informational value of certain tests. Frequently occurring problems regarding the mix design and production of lightweight concrete are addressed and the unintended consequences are described. A critical view is provided on some information given in existing European concrete standards regarding the mechanical properties of structural lightweight concrete. Finally, the latest stage of development of very light lightweight concretes is presented. Infra-lightweight concrete is introduced as an innovative approach for further extending the range of applications of lightweight concrete by providing background knowledge and experiences from case records.
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Szafraniec, Małgorzata, and Danuta Barnat-Hunek. "Evaluation of the contact angle and wettability of hydrophobised lightweight concrete with sawdust." Budownictwo i Architektura 19, no. 2 (June 30, 2020): 019–32. http://dx.doi.org/10.35784/bud-arch.1644.

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The aim of the research presented in the paper was to evaluate the feasibility of using hydrophobic preparations based on organosilicon compounds for protection treatment on the lightweight concrete modified with sawdust. The experimental part of the work concerns the physical and mechanical properties of lightweight concrete and the influence of two hydrophobic agents on the contact angle of the material. Lightweight concrete contact angle (θw) was determined as a time function using one measuring liquid. Water repellent coatings in lightweight concrete structure with the coarse aggregate sawdust (CASD) using electron microscopy were presented. The effectiveness of hydrophobisation of porous lightweight concretes was determined on the basis of the research. For the hydrophobic surface, the contact angle decreased and it depended on the used agents. The lowest contact angle of 40.2° (t=0) was obtained for reference concrete before hydrophobisation and 112.2° after hydrophobisation with a methyl-silicone resin based on organic solvent. The results of scientific research confirm the possibility to produce lightweight concretes modified with CASD with adequate surface protection against external moisture.
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Barnat-Hunek, Danuta, Piotr Smarzewski, Grzegorz Łagód, and Zbigniew Suchorab. "Evaluation of the Contact Angle of Hydrophobised Lightweight-Aggregate Concrete with Sewage Sludge." Ecological Chemistry and Engineering S 22, no. 4 (December 1, 2015): 625–35. http://dx.doi.org/10.1515/eces-2015-0037.

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Abstract The aim of the research presented in the paper was to evaluate the feasibility of using hydrophobic preparations based on organosilicon compounds for protection treatment of lightweight aggregates modified with municipal sewage sludge. Issues related to the wettability of the surface layer of hydrophobised lightweight-aggregate concrete supplemented with sewage sludge are discussed in the paper. The experimental part of the study is focused on the physical and mechanical characteristics of lightweight-aggregate concrete and the effect of two hydrophobic preparations on the contact angle of the material. The contact angle for lightweight concrete (θw) was determined as a function of time using one measurement liquid. The hydrophobic coatings in the structure of lightweight concrete modified with sewage sludge were shown using electron microscopy. The investigations demonstrated the effectiveness of hydrophobisation of porous lightweight concretes. On the hydrophobic surfaces, the contact angles decreased with time and depended on the preparations used. The results of the research confirm the possibility to produce lightweight aggregate-concretes modified with sewage sludge with appropriate surface protection against external moisture.
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Kadlec, Jaroslav, Ivailo Terzijski, František Girgle, and Lukáš Zvolánek. "Effect of Lightweight Concrete Density on Bond Strength." Advanced Materials Research 1106 (June 2015): 33–36. http://dx.doi.org/10.4028/www.scientific.net/amr.1106.33.

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The main objective of this paper is connected with the search of an optimal anchorage length of reinforcement in lightweight and ultra-lightweight concretes. Experimentally obtained values of the bond stress between lightweight concrete and reinforcing bars are presented. The density classes of lightweight concrete were D1,0, D1,2 and D1,4. The results are compared with equal ones of normal density concrete. The tests with ordinary reinforcement and with non-metallic hybrid reinforcement C-GFPR (30% portion of carbon fibres) were conducted.
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Dissertations / Theses on the topic "Lightweight concrete"

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Van, Rooyen Algurnon Steve. "Structural lightweight aerated concrete." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80106.

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Thesis (MScEng)--Stellenbosch University, 2013.
Cellular concrete is a type of lightweight concrete that consists only of cement, water and sand with 20 per cent air by volume or more air entrained into the concrete. The two methods used for air entrainment in cellular concrete are (1) the use of an air entraining agent (AEA), and (2) the use of pre-formed foam. If pre-formed foam is used to entrain air into the concrete the concrete is named foamed concrete and if an AEA is used the concrete is termed aerated concrete. Depending on the type of application, structural or nonstructural, cellular concrete can be designed to have a density in the range of range of 400 to 1800 kg/m3. Non-structural applications of cellular concrete include void and trench filling, thermal and acoustic insulation. Structural applications of cellular concrete include pre-cast units such as concrete bricks, partitions, roof slabs etc. Due to the high levels of air in cellular concrete it is challenging to produce compressive strengths that are sufficient to classify the concrete as structurally useful when non-autoclaving curing conditions are used. The autoclaving process combines high temperature and pressure in the forming process, which causes higher strength and reduced shrinkage. This process is also limited to prefabricated units. Non-autoclave curing conditions include moist curing, dry curing, wrapping the concrete in plastic, etc. However, now that the world is moving in an energy efficient direction, ways to exclude energy-intensive autoclaving are sought. It has for instance been found that the utilisation of high volumes of fly-ash in cellular concrete leads to higher strengths which make it possible to classify the concrete as structurally useful. Now, that there is renewed interest in the structural applications of the concrete a design methodology using an arbitrary air entraining agent needs to be found. The research reported in this thesis therefore attempts to find such a methodology and to produce aerated concrete with a given density and strength that can be classified as structurally useful. For the mix design methodology, the following factors are investigated: water demand of the mix, water demand of the mix constituents, and the amount of AEA needed to produce aerated concrete with a certain density. The water demand of the mix depends on the mix constituents and therefore a method is proposed to calculate the water demand of the mix constituents based on the ASTM flow turn table. Due to the complex nature of air entrainment in concrete, the amount of air entrained into the concrete mix is not known beforehand, and a trial and error method therefore had to be developed. The trial mixes were conducted in a small bakery mixer. From the trial mixes estimated dosages of AEA were found and concrete mixes were designed based on these mixes. The factors that influence the mix design and strength of aerated concrete include filler/cement ratio (f/c), fly-ash/cement ratio (a/c) and design target density. Additional factors that influence the strength of aerated concrete are specimen size and shape, curing, and concrete age. It was found that the sand type and f/c ratio influence the water demand of the concrete mix. Sand type and f/c ratio also influence compressive strength, with higher strength for a finer sand type and lower f/c ratios. However, the concrete density is the factor that influences the strength the most.
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Madandoust, R. "Strength assessment of lightweight concrete." Thesis, University of Liverpool, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314561.

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Ghavam-Shahidy, Hamid. "Lightweight aggregate reinforced concrete deep beams." Thesis, University of Dundee, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.503556.

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Banta, Timothy E. "Horizontal Shear Transfer Between Ultra High Performance Concrete And Lightweight Concrete." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/31446.

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Ultra high performance concrete, specifically Ductal® concrete, has begun to revolutionize the bridge design industry. This extremely high strength material has given smaller composite sections the ability to carry larger loads. As the forces being transferred through composite members are increasing in magnitude, it is vital that the equations being used for design are applicable for use with the new materials. Of particular importance is the design of the horizontal shear reinforcement connecting the bridge deck to the top flange of the beams. Without adequate shear transfer, the flexural and shearing capacities will be greatly diminished. The current design equations from ACI and AASHTO were not developed for use in designing sections composed of Ductal® and Lightweight concrete. Twenty-four push-off tests were performed to determine if the current horizontal shear design equations could accurately predict the horizontal shear strength of composite Ductal® and Lightweight concrete sections. Effects from various surface treatments, reinforcement ratios, and aspect ratios, were determined. The results predicted by the current design equations were compared to the actual results found during testing. The current design equations were all found to be conservative. For its ability to incorporate various cohesion and friction factors, it is recommended that the equation from AASHTO LRFD Specification (2004) be used for design.
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Arasteh, A. R. "Structural applications of lightweight aggregate foamed concrete." Thesis, University of Westminster, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382269.

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Catoia, Thiago. "Concreto ultraleve® estrutural com pérolas de EPS: caracterização do material e estudo de sua aplicação em lajes." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-19122012-104222/.

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A utilização de concreto leve decorre especialmente dos benefícios promovidos pela redução da massa específica do material, tais como menores esforços nas estruturas, economia com fôrmas e cimbramento, além de diminuição dos custos com transporte e montagem de construções pré-fabricadas. Atualmente, além das questões técnicas e econômicas, a escolha dos materiais de construção deve levar em conta os aspectos ambientais. Portanto, o uso de poliestireno expandido (EPS) na produção de concreto pode abrir portas para o emprego de resíduos de materiais dessa natureza, e ainda usufruir de sua baixa massa específica nas aplicações estruturais. Este trabalho teve como objetivo determinar as principais características do concreto leve com pérolas (esferas) de EPS, também conhecido como Concreto Ultraleve® ou Concreflex®, características essas necessárias para projetar elementos estruturais, e analisar o comportamento de lajes produzidas com esse novo material. Mais especificamente, foram determinadas características mecânicas, tais como: resistência à compressão, módulo de elasticidade e resistência à tração, na compressão diametral e na flexão, além de características de deformação de longo prazo, como retração e fluência. Também foi determinada a massa específica e avaliada sua relação com as características mecânicas, além dos ensaios de modelos de lajes unidirecionais produzidas com esse concreto. Para analisar a possibilidade de aplicação prática do concreto leve com EPS em lajes, foram elaboradas tabelas para pré-dimensionamento de lajes unidirecionais e bidirecionais com o novo material, nas quais essas lajes foram comparadas com as de concreto comum. Com base no procedimento experimental e nos resultados dos ensaios, o objetivo de determinar as características necessárias para projetar elementos estruturais de Concreto Leve com EPS foi alcançado. Pode-se ainda afirmar que o concreto estudado, com aproximadamente metade da massa específica dos concretos convencionais, apresenta características compatíveis com a produção e o uso comercial de lajes maciças, principalmente pré-moldadas, o que pode ser estendido a outros elementos que não necessitem de concretos com resistência muito alta. Também foi avaliado o comportamento de modelos de lajes de concreto leve com poliuretano (PU), de maneira semelhante ao estudo realizado com EPS, incluindo a caracterização do concreto de cada modelo. Para complementar a análise de desempenho do concreto leve com EPS, apresentou-se um estudo de carbonatação, que comprovou a excelente condição desse novo material com relação à durabilidade.
The use of lightweight concrete is mainly due to the benefits provided by reducing the density of the material such as smaller efforts on structures, economy of molds and scaffolding, as well as lower costs of transportation and erection of precast constructions. Currently, besides the technical and economic issues, the choice of building materials should take into account environmental aspects. Therefore, the use of expanded polystyrene (EPS) in the concrete production can open doors for the use of waste materials of this nature, and still to take advantage of its low density in structural applications. This study aimed to determine the main characteristics of the lightweight concrete with EPS beads (spheres), also named Ultra Lightweight Concrete, characteristics which are necessary to design structural members, and analyze the behavior of slabs produced with this new material. More specifically mechanical properties were determined, such as compressive strength, modulus of elasticity, and splitting and flexural tensile strength, as well as long term deformation properties such as shrinkage and creep. The density was also determined and evaluated its association with the mechanical characteristics, besides the tests of unidirectional slab models produced with this concrete. To analyze the possibility of use of the lightweight concrete with EPS in slabs, tables were compiled for pre-design of unidirectional and bidirectional slabs with this new material, in which these slabs were compared with those of common concrete. Based on the experimental procedure and results of tests, the aim of determine the characteristics necessary to design structural elements of lightweight concrete with EPS has been achieved. Can be also said that the studied concrete, with about half the density of conventional concrete, presents mechanical characteristics compatible with commercial production and use of slabs, mainly precast, conclusion which can be extended to other components that do not require concretes with very high strength. It was also assessed the behavior of slab models of lightweight concrete with polyurethane (PU) in a similar way to the study carried out with EPS, including the characterization of concrete for each model. To complement the performance analysis of the lightweight concrete with EPS a study of carbonation was presented, which proved the excellent condition of this new material with respect to durability.
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Argudo, Jaime Fernando. "Evaluation and synthesis of experimental data for autoclaved aerated concrete /." Full-text Adobe Acrobat (PDF) file, 2003. http://www.engr.utexas.edu/research/fsel/FSEL_reports/Thesis/Argudo,%20Jaime.pdf.

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Wilkinson, Ryan Jeffrey. "Behavior of Unreinforced Lightweight Cellular Concrete Backfill for Reinforced Concrete Retaining Walls." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/9101.

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Lightweight cellular concrete (LCC) is a mixture of cement, water and foam, with a density less than 50 pcf. This material is being used increasingly often in a variety of construction applications due to its self-leveling, self-compacting, and self-consolidating properties. LCC may be used as a backfill or structural fill in areas where traditional granular backfill might normally be used. This material may be especially advantageous in areas where the underlying soil may not support the weight of a raised earth embankment. Testing on the behavior of LCC when used as backfill behind retaining walls is relatively limited. The effects of surcharge on the development of active pressure material are unknown. Two large-scale active pressure tests were conducted in the structures laboratory of Brigham Young University. Each test was performed within a 10-ft x 10-ft x 12-ft box that was filled with four lifts of LCC. Hydraulic jacks mounted to a steel reaction frame provided a surcharge load to the LCC surface. In the first test, the LCC was confined on three sides by the reaction frame, while the fourth side was confined by a reinforced concrete cantilever (RCC) wall. Both vertical and horizontal pressures and deflections were measured to determine the effect of the surcharge load on the development of active pressure behind the wall. In the second test, the LCC was confined on three sides and exposed on the fourth. Surcharge was applied to this sample in a similar fashion until the LCC reached ultimate failure. Vertical pressures and displacements, along with horizontal displacements, were measured in this test. Sample cylinders of LCC were cast at the time the test box was filled. These samples were tested periodically to determine the material strength and density. It was observed that the LCC backfill developed active pressure most similarly to a granular soil with a friction angle of 34º and a cohesion between 700 and 1600 psf. The RCC wall was seen to add vertical bearing capacity to the LCC, as well as prevent the catastrophic and brittle failure seen in the free-face test. It was also observed that an induced shear plane in the material dramatically decreased the total bearing capacity when compared to a uniformly loaded specimen with no induced shear plane. The results of this study were compared with design parameters given in previous research, and new design suggestions are presented herein.
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Dunbeck, Jennifer. "Evaluation of high strength lightweight concrete precast, prestressed bridge girders." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28091.

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Ali, Ahsan. "Bond behavior of lightweight steel fibre-reinforced concrete." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2017. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-230104.

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This research was undertaken for studying the bond behaviour of Lightweight Fibre-reinforced Concrete (LWFC). Lightweight concrete is inherently weak in tension and has higher brittleness than the conventional concrete. To improve these and other properties, it is generally reinforced with deformed bars and fibres. There are number of studies that favour the use of Steel fibres, however such studies are mainly focused either on normal weight concrete or on the mechanical properties of different concretes. There are also different committee reports and in some cases specific sections of codes that specifically deal with the normal weight fibre-reinforced concrete. However, such is not the case with lightweight fibre-reinforced concrete; there is limited literature available especially on the Bond of lightweight fibre-reinforced concrete. In current research work effect of fibres is studied on the bond behaviour of the lightweight reinforced concrete. Since most of code provisions for bond are based on experimental work originally carried out on conventional concrete, effect of fibres on bond of conventional concrete was therefore also included in present research domain. Main bond tests were carried out using Pull-out test methodology. Test results indicate that the ultimate bond strength of conventional concrete when reinforced with steel fibres increased by 29%. However due to very low density and high porosity of lightweight aggregates, no significant improvement on bond strength of LWFC, as a result of fibres’ addition could be observed. Nevertheless, there is noteworthy improvement in the post-cracking bond strength of LWFC. Besides this, current bond-stress slip law as defined by Model Code 2010 does not reflect the positive effect of fibres, hence some modifications are suggested. It is also found that among the existing code expressions for estimation of bond strength, expression proposed by Model Code 2010 presents better results and its effectiveness can be further increased if fibre factor and factor for lightweight concrete are considered.
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Books on the topic "Lightweight concrete"

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1941-, Clarke John L., ed. Structural lightweight aggregate concrete. London: Blackie Academic & Professional, 1993.

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Brown, Heather J., and Matthew Offenberg. Pervious concrete. West Conshohocken, PA: ASTM International, 2012.

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Bennett, D. F. H. Structural concrete updates: High-strength concrete, lightweight concrete and shearheads. Slough: Published on behalf of the industry sponsors of the Reinforced Concrete Campaign by the British Cement Association, 1990.

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A, Holm Thomas, Vaysburd Alexander M, and American Concrete Institute, eds. Structural lightweight aggregate concrete performance. Detroit: American Concrete Institute, 1992.

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P, Ries John, Holm Thomas A, ACI Committee 213., and American Concrete Institute Convention, eds. High-performance structural lightweight concrete. Farmington Hills, Mich: American Concrete Institute, 2004.

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Silaenkov, E. S. Dolgovechnostʹ izdeliĭ iz i͡a︡cheistykh betonov. Moskva: Stroĭizdat, 1986.

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I͡Amleev, U. A. Tekhnologii͡a proizvodstva legkobetonnykh konstrukt͡siĭ. Moskva: Stroĭizdat, 1985.

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ACI Committee 523. Guide for cast-in-place low density cellular concrete. Farmington Hills, Ill: American Concrete Institute, 2006.

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Komokhov, P. G. Strukturnai͡a︡ mekhanika i teplofizika legkogo betona. [Vologda]: Vologodskiĭ nauch. t͡s︡entr, 1992.

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RILEM International Symposium on Autoclaved Aerated Concrete (1992 Zürich, Switzerland). Advances in autoclaved aerated concrete: Proceedings of the 3rd RILEM International Symposium on Autoclaved Aerated Concrete, Zürich, Switzerland, 14-16 October 1992. Rotterdam: A.A. Balkema, 1992.

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Book chapters on the topic "Lightweight concrete"

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Hoffman, Edward S., David P. Gustafson, and Albert J. Gouwens. "Structural Lightweight Aggregate Concrete." In Structural Design Guide to the ACI Building Code, 419–22. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-6619-6_15.

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Hansemann, Georg, Christoph Holzinger, Robert Schmid, Joshua Paul Tapley, Stefan Peters, and Andreas Trummer. "Lightweight Reinforced Concrete Slab." In Towards Radical Regeneration, 456–66. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-13249-0_36.

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Mehdizadeh, Samim, and Oliver Tessmann. "Animate Concrete: Materialization of Concrete Element Kinetic Assemblies." In Computational Design and Robotic Fabrication, 395–407. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-8405-3_33.

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AbstractAnimate Concrete informs building elements for motion and future reuse. This paper gives technical insight into strategies to reconfigure building systems with lightweight and movable concrete elements. Animate Concrete asks, what if architecture becomes an ever-changing system built with lightweight but heavy-looking elements that can move, assemble and disassemble through a gentle human touch? This vision allows for a versatile space, adaptation, and reconfigurability. Animate Concrete furthermore seeks to provide novel strategies to minimize material consumption for building elements by rotoforming thereby significantly reducing the weight of robotically precast concrete elements.
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Nojiri, Y., Y. Tazawa, and Y. Nobuta. "Durability of Lightweight Concrete for Arctic Concrete Structures." In Ocean Space Utilization ’85, 431–38. Tokyo: Springer Japan, 1985. http://dx.doi.org/10.1007/978-4-431-68284-4_46.

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Matthäus, Carla, Daniel Weger, Thomas Kränkel, Luis Santos Carvalho, and Christoph Gehlen. "Extrusion of Lightweight Concrete: Rheological Investigations." In RILEM Bookseries, 409–16. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22566-7_47.

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Trad, Ayman, Hassan Ghanem, and Raafat Ismail. "Bond Behaviour of Structural Lightweight Concrete." In High Tech Concrete: Where Technology and Engineering Meet, 595–603. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_71.

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Ma, X., Y. Zhuge, D. Li, and N. Gorjian. "Structural Properties of Lightweight Rubberized Concrete." In Lecture Notes in Civil Engineering, 53–60. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7603-0_6.

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Holschemacher, K., A. Ali, and S. Iqbal. "Bond of reinforcement in lightweight concrete." In Insights and Innovations in Structural Engineering, Mechanics and Computation, 1284–85. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2016. http://dx.doi.org/10.1201/9781315641645-210.

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Pratikto, Pratikto, and Anni Susilowati. "Precast Concrete Slab of Lightweight Brick." In Proceedings of the International Conference on Applied Science and Technology on Engineering Science 2023 (iCAST-ES 2023), 236–45. Dordrecht: Atlantis Press International BV, 2024. http://dx.doi.org/10.2991/978-94-6463-364-1_23.

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Mittal, Ayush, Akhilesh Singh, Aman Kumar Chaudhary, and Avinash Kumar. "Lightweight Concrete by Using Waste Materials." In Lecture Notes in Civil Engineering, 73–85. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2676-3_7.

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Conference papers on the topic "Lightweight concrete"

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"Lightweight Concrete in the Marine Environment." In SP-218: High Performance Structural Lightweight Concrete. American Concrete Institute, 2004. http://dx.doi.org/10.14359/13053.

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"Lightweight Concrete Makes a Dam Float." In SP-218: High Performance Structural Lightweight Concrete. American Concrete Institute, 2004. http://dx.doi.org/10.14359/13057.

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"High Strength Lightweight Aggregate Concrete for Arctic Applications--Part 1: Unhardened Concrete Properties." In SP-136: Structural Lightweight Aggregate Concrete Performance. American Concrete Institute, 1993. http://dx.doi.org/10.14359/4008.

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"Pumping of Lightweight Concrete Using Non-Presoaked Lightweigh tAggregate." In SP-109: Concrete in Marine Environment. American Concrete Institute, 1988. http://dx.doi.org/10.14359/2096.

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"Shear Strength of Lightweight Reinforced Concrete Beams." In SP-218: High Performance Structural Lightweight Concrete. American Concrete Institute, 2004. http://dx.doi.org/10.14359/13055.

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""High-Ductility, High-Strength Lightweight Aggregate Concrete"." In SP-136: Structural Lightweight Aggregate Concrete Performance. American Concrete Institute, 1993. http://dx.doi.org/10.14359/4128.

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"Lightweight Concrete Bridges for California Highway System." In SP-136: Structural Lightweight Aggregate Concrete Performance. American Concrete Institute, 1993. http://dx.doi.org/10.14359/4240.

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""Durability of Lightweight Concrete and its Connections With the Composition of Concrete, Design, and Construction Methods"." In SP-136: Structural Lightweight Aggregate Concrete Performance. American Concrete Institute, 1993. http://dx.doi.org/10.14359/4267.

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"Norway Bridges Using High Performance Lightweight Aggregate Concrete." In SP-218: High Performance Structural Lightweight Concrete. American Concrete Institute, 2004. http://dx.doi.org/10.14359/13063.

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"Composite Bridge Systems with High-Performance Lightweight Concrete." In SP-218: High Performance Structural Lightweight Concrete. American Concrete Institute, 2004. http://dx.doi.org/10.14359/13056.

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Reports on the topic "Lightweight concrete"

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Sneed, Lesley H., and Dane M. Shaw. Lightweight Concrete Modification Factor for Shear Friction. Precast/Prestressed Concrete Institute, 2013. http://dx.doi.org/10.15554/pci.rr.comp-007.

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Zareh, Mohammad. Comparative study of lightweight and normal weight concrete in flexure. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.1481.

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Ramirez, J., J. Olek, and Eric Rolle. Performance of Bridge Decks and Girders with Lightweight Aggregate Concrete. West Lafayette, IN: Purdue University, 2000. http://dx.doi.org/10.5703/1288284313288.

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Phan, Long T., and H. S. Lew. Punching shear resistance of lightweight concrete offshore structures for the Arctic:. Gaithersburg, MD: National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nist.ir.88-4007.

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McLean, David I., H. S. Lew, Long T. Phan, and Mary Sansalone. Punching shear resistance of lightweight concrete offshore structures for the Arctic :. Gaithersburg, MD: National Bureau of Standards, 1986. http://dx.doi.org/10.6028/nbs.ir.86-3388.

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Phan, Long T., H. S. Lew, and David I. McLean. Punching shear resistance of lightweight concrete offshore structures for the Arctic :. Gaithersburg, MD: National Bureau of Standards, 1986. http://dx.doi.org/10.6028/nbs.ir.86-3440.

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McLean, David I., H. S. Lew, Long T. Phan, and Hae In Kim. Punching shear resistance of lightweight concrete offshore structures for the Arctic :. Gaithersburg, MD: National Bureau of Standards, 1986. http://dx.doi.org/10.6028/nbs.ir.86-3454.

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Cross, Rachel, and Sandip Chhetri. Extended Testing of Strand Lifting Loop Capacity. Precast/Prestressed Concrete Intitute, 2023. http://dx.doi.org/10.15554/pci.rr.misc-008.

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This work on lifting loops builds on previous investigations and testing (Chhetri et al, 2020; Chhetri et al, 2021) and considers additional design and detailing parameters for prestressing strand lifting loops. The results from the loops in lightweight concrete demonstrated the influence of Mohs hardness of the coarse aggregate on loop capacity. These loops generally performed better than the Mertz test loops in normalweight concrete (Chhetri et al., 2021), which had a softer coarse aggregate. In addition, the strand bond of the loops used for the lightweight concrete testing was higher. Both of these factors ought to be considered when deciding the safe load for lifting loops.
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Deb, Robin, Paramita Mondal, and Ardavan Ardeshirilajimi. Bridge Decks: Mitigation of Cracking and Increased Durability—Materials Solution (Phase III). Illinois Center for Transportation, December 2020. http://dx.doi.org/10.36501/0197-9191/20-023.

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Type K cement offers a lower slump than conventional concrete, even at a higher water-to-cement ratio. Therefore, a suitable chemical admixture should be added to the Type K concrete mix design at a feasible dosage to achieve and retain target slump. In this project, a compatibility study was performed for Type K concrete with commercially available water-reducing and air-entraining admixtures. Slump and air content losses were measured over a period of 60 minutes after mixing and a particular mid-range water-reducing admixture was found to retain slump effectively. Furthermore, no significant difference in admixture interaction between conventional and Type K concrete was observed. Another concern regarding the use of Type K concrete is that its higher water-to-cement ratio can potentially lead to higher permeability and durability issues. This study also explored the effectiveness of presoaked lightweight aggregates in providing extra water for Type K hydration without increasing the water-to-cement ratio. Permeability of concrete was measured to validate that the use of presoaked lightweight aggregates can lower water adsorption in Type K concrete, enhancing its durability. Extensive data analysis was performed to link the small-scale material test results with a structural test performed at Saint Louis University. A consistent relation was established in most cases, validating the effectiveness of both testing methods in understanding the performance of proposed shrinkage-mitigation strategies. Stress analysis was performed to rank the mitigation strategies. Type K incorporation is reported to be the most effective method for shrinkage-related crack mitigation among the mixes tested in this study. The second-best choice is the use of Type K in combination with either presoaked lightweight aggregates or shrinkage-reducing admixtures. All mitigation strategies tested in this work were proved to be significantly better than using no mitigation strategy.
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Ramirez, J., J. Olek, and Eric Rolle. Performance of Bridge Decks and Girders with Lightweight Aggregate Concrete, v. 2 of 2. West Lafayette, IN: Purdue University, 2000. http://dx.doi.org/10.5703/1288284314240.

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