Relevant bibliographies by topics / Ultrarapid hardening cementitious systems

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Academic literature on the topic 'Ultrarapid hardening cementitious systems'

Author: Grafiati
Published: 28 May 2022

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Journal articles on the topic "Ultrarapid hardening cementitious systems"

1

Sounthararajan, V. M., and A. Sivakumar. "Pulse Velocity Measurements in Fly Ash Blended Cementitious Systems Containing 43 Grade Cement." ISRN Civil Engineering 2013 (May 27, 2013): 1–7. http://dx.doi.org/10.1155/2013/369387.

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Investigations on the different supplementary cementitious materials based on the hardening properties and the optimized dosage in cementitious systems find the right choice of pozzolanic material. It is essential to combine various additive/admixtures in concrete in proper proportions to maximize the benefits resulting in cost savings in construction. In the recent years, production technology and composition of hydraulic cements affect the setting and early age behavior of cementitious material. The addition of fly ash in cement is one viable technology to derive maximum benefits in terms of the economy and improved pozzolanic reaction. Ultrasonic pulse velocity testing is a feasible method for evaluating the hardening properties of cementitious materials. In this study, an attempt was made to derive the engineering basis for understanding the development of hardness during hydration of fly ash (FA) based cementitious systems. The tests conducted using pulse velocity technique proved to be an effective method for characterizing the early strength gain properties of different cementitious systems.
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Kirakevych, Iryna, Myroslav Sanytsky, and Igor Margal. "Self-Сompacting Сoncretes, which hardening at different temperature conditions." Theory and Building Practice 2020, no. 2 (November 20, 2020): 107–12. http://dx.doi.org/10.23939/jtbp2020.02.107.

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In the article the features of reinforced concrete hardening at different temperature conditions and the current issues of preparation technology of Self-Сompacting Сoncretes (SCC) on the basis of superplasticized cementitious systems, combining knowledge of structure and modifying Portland cement compositions "Portland cement – active mineral additives – microfiller – superplasticizer – accelerator of hardening" to search for rational making provision of technical and building properties of concrete in the changing factors of its composition, technology and exploitation are shown. The physico-chemical peculіarities of hydration and hardening processes of superplasticized cementitious systems were established. The problem of obtaining Self-Compacting mixtures and Rapid-Hardening Concretes on their basis by the direct structure formation of cementitious matrix was solves. The optimization of Self-Compacting Concretes composition on the base of superplasticized cementitious systems with high early strength was carried out. The quality parameters of developed concretes were investigated and the effectiveness of their using in different temperature conditions was shown. The results of the studies found that the use of the superplasticized cementitious systems allows to influence on technological properties and kinetics of structure formation and create concrete structure with improved construction and technical properties at a different temperature conditions. Technological solutions designing of superplasticized cementitious systems that solves the problem of obtaining the Self-Сompacting Сoncretes (SCC) on their basis with using non-vibration technology are established. This creates an opportunity allows to solve the problem of obtaining for enabling early loading, reducing the production cycle, increasing turnover and formwork acceleration of monolithic buildings and structures at different temperature conditions.
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Kirakevych, Iryna, Myroslav Sanytsky, Orest Shyiko, and Roman Kagarlitsky. "MODIFICATION OF CEMENTITIOUS MATRIX OF RAPID-HARDENING HIGH-PERFORMANCE CONCRETES." Theory and Building Practice 2021, no. 1 (June 22, 2021): 79–84. http://dx.doi.org/10.23939/jtbp2021.01.079.

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The paper presents the results of research concerning the peculiarities of modern High Performance Concretes based on cementitious systems "Portland cement – active mineral additives – micro fillers – superplasticizers – accelerators of hardening". Physico-chemical regularities of structure formation of super plasticized cementitious systems are established. It is shown that the formation of secondary fine ettringite due to the interaction of active alumina with calcium hydroxide and gypsum in the non-clinker part of the binder because of the effect of "self-reinforcement" compensates for shrinkage and increases the strength of the cementitious system. The modification of the cementitious matrix makes it possible to obtain Rapid Hardening High Performance Concretes that provide early loading and turnover of the formwork of monolithic constructions.
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Luković, Mladena, Hua Dong, Branko Šavija, Erik Schlangen, Guang Ye, and Klaas van Breugel. "Tailoring strain-hardening cementitious composite repair systems through numerical experimentation." Cement and Concrete Composites 53 (October 2014): 200–213. http://dx.doi.org/10.1016/j.cemconcomp.2014.06.017.

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Park, Wan Shin, Young Il Jang, Hyun Do Yun, Il Seung Yang, and Bae Su Khil. "The Behavior of Pseudo Strain-Hardening Cementitious Composite (PSH2C) Using Synthetic Fibers under Uniaxial Tensile Loading." Key Engineering Materials 627 (September 2014): 449–52. http://dx.doi.org/10.4028/www.scientific.net/kem.627.449.

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The application of pseudo strain-hardening cement composites (PSH2C) to structural systems depends primarily on the tensile response of the materials, which is a direct function of fiber and matrix characteristics, the fiber content or volume fraction. In general, improved response of material is observed with an increase in the fiber volume fraction, as long as the fiber content does not impede mixing. This paper addresses the direct tensile response of pseudo strain hardening cement composites (PSH2C) reinforced with PET fibers, which belongs to a class of discontinuous short fiber reinforced cement based composites characterized by a strain hardening and multiple cracking responses under direct tensile loading. The variables are different types of fibers (PET, PET+PE, PET+PVA).
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Park, Wan Shin, Jeong Eun Kim, Sun Woong Kim, Song Hee Yun, Nam Young Eom, and Hyun Do Yun. "Panel Shear Strength of Steel Coupling Beam-Pseudo Strain Hardening Cementitious Composite Wall Connection." Applied Mechanics and Materials 328 (June 2013): 965–69. http://dx.doi.org/10.4028/www.scientific.net/amm.328.965.

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Hybrid coupled wall systems, where steel coupling beams couple two or more pseudo strain hardening cementitious composite (PSH2C) shear wall can be used in medium and high-rise construction subjected to earthquake. This paper addresses the panel shear strength of steel coupling beams - PSH2C shear wall connection. Test variables included the connection detail in hybrid coupled shear wall system. The results show that Specimens PSH2C-PSFF and PSH2C-PSFFT exhibits greater panel shears strength than Specimen PSH2C-PSF.
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Shang, Xing-yan, Jiang-tao Yu, Ling-zhi Li, and Zhou-dao Lu. "Strengthening of RC Structures by Using Engineered Cementitious Composites: A Review." Sustainability 11, no. 12 (June 19, 2019): 3384. http://dx.doi.org/10.3390/su11123384.

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This paper presents a review of the recent work assessing the performance of building structures strengthened with engineered cementitious composite (ECC). ECC characterizes tensile strain hardening and multiple cracking properties, as well as strong interfacial bonding performance with substrate concrete, which makes it a promising retrofitting material. A lot of researches have been conducted on reinforced concrete (RC) structures, including beams, columns, beam–column joints, and fire-damaged slabs, strengthened with ECC material, and an extensive collection of valuable conclusions were obtained. These strengthening systems usually combine ECC with FRP textiles or steel bars to form a composite strengthening layer. The review demonstrates that ECC strengthening can greatly improve the performance of RC structures.
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Oproiu, Carmen-Lidia, Georgeta Voicu, Alina Bădănoiu, and Adrian-Ionuţ Nicoară. "The Solidification/Stabilization of Wastewater (From a Landfill Leachate) in Specially Designed Binders Based on Coal Ash." Materials 14, no. 19 (September 27, 2021): 5610. http://dx.doi.org/10.3390/ma14195610.

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The aim of this study is to assess the possibility to solidify/stabilize a liquid waste from a municipal waste landfill using binders based on coal ash (fly ash and bottom ash) and specially designed cements for waste treatment (INERCEM). The leaching test proved that all cementitious systems are efficient for the solidification/stabilization of the studied wastes and can reduce the leaching potential of heavy metals present in both liquid waste and coal ash. Therefore, these wastes cease to be a source of environmental pollution. X-ray diffraction (XRD) and thermal complex analysis (DTA-TG) were used to assess the nature and amount of compounds formed in these cementitious systems during the hydration and hardening processes; ettringite, calcium silicate hydrates and CaCO3 were the main compounds formed in these systems assessed by these methods. The microstructure of hardened specimens was assessed by scanning electronic microscopy (SEM); the presence of hydrate phases, at the surface of cenospheres present in fly ash, proved the high pozzolanic reactivity of this phase.
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9

Cho, Chang-Geun, and Sun-Ju Lee. "Inelastic Responses and Finite Element Predictions of Fiber Cementitious Composite and Concrete Columns." Materials 14, no. 9 (April 24, 2021): 2180. http://dx.doi.org/10.3390/ma14092180.

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In this research, reinforced concrete (RC) and strain-hardening cementitious composite (SHCC) columns subjected to lateral loads combined with a constant load were investigated, both by experiments and predictions, with two distributed inelastic finite element models established by the stiffness and flexibility formulations. SHCC applied in the column plastic hinge region could not only enhance the lateral load and displacement capacities of columns but also offer effective advantages in the control of bending and shear cracks induced by multiple microcracks, the prevention of the spalling of cover concrete, and the resistance to buckling of steel bars. With the layered cross-sectional approach using constitutive laws of SHCC considering a proposed model of the post-cracked high-ductile tensile characteristics, as well as concrete and reinforcing steel bars, an inelastic beam-column finite element model was presented with a distributed flexibility formulation. In comparison with experiments concerning the RC and reinforced strain-hardening cementitious composite (R-SHCC) columns, the current flexibility method showed relatively accurate estimations in the lateral load and displacement responses of column systems as well as in localized nonlinear responses of cross-section as estimated in axial strains of longitudinal reinforcing steel bars. In comparison with the stiffness method, the current flexibility method gave more accurate solutions at both element and structural levels, as manifested in the experiments and analysis solutions.
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10

Schmidt, Wolfram, Henricus Jozef Hubertus Brouwers, Hans Carsten Kuehne, and Birgit Meng. "Influence of Environmental Temperatures on the Performance of Polymeric Stabilising Agent in Fresh Cementitious Materials." Key Engineering Materials 466 (January 2011): 97–104. http://dx.doi.org/10.4028/www.scientific.net/kem.466.97.

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Stabilising admixtures are commonly used additives in repair mortars and grouts. Beyond this, such type of admixture is increasingly used in concrete and other cementitious materials. In particular when fresh mortar or concrete properties have to be adjusted reliably, stabilising agents can be beneficially used to improve workability and robustness of the mixture. The mode of operation of these admixtures varies, rather affecting either the liquid phase or the solid particles in the dispersion, both causing strong interactions with the mortar or concrete system, and significant changes in their rheological behaviour. Furthermore, these are strongly affected by the environmental temperature during the casting process. In the paper the effect of temperature on the performance of stabilising agents in cementitious systems is presented and how performance changes affect fresh and hardening mortar or concrete properties. Particular attention is placed on interactions between stabilising agents and superplasticizers. Results are discussed with special focus on self-compacting concrete.
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Book chapters on the topic "Ultrarapid hardening cementitious systems"

1

Kiranmai, R., A. Rohita Susheela, S. Rajkumar, G. Asheesh, and V. M. Sounthararajan. "Rapid Hardening on the Strength Gain Admixture on Behavior of Concrete with Replacement of Binary Cementitious Materials." In Learning and Analytics in Intelligent Systems, 222–33. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-24314-2_29.

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"Interfacial Transition and Destruction in Hardening of Water—Silicate Dispersion Systems." In Interfacial Transition Zone in Cementitious Composites, 89–96. CRC Press, 2004. http://dx.doi.org/10.1201/9781482295085-13.

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Conference papers on the topic "Ultrarapid hardening cementitious systems"

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Rizwan, Syed Ali. "Early volume changes of high performance self-compacting cementitious systems containing pozzolanic powders." In International RILEM Conference on Volume Changes of Hardening Concrete: Testing and Mitigation. RILEM Publications, 2006. http://dx.doi.org/10.1617/2351580052.030.

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