Results 181 to 190 of about 8,674 (232)

Autogenous shrinkage and drying shrinkage of recycled aggregate concrete: A review

Journal of Cleaner Production, 2021
Abstract This paper comprehensively reviews the factors influencing the autogenous shrinkage and drying shrinkage of recycled aggregate concrete (RAC). Compared with natural aggregate concrete (NAC), RAC has a lower autogenous shrinkage because of the internal curing effect of recycled concrete aggregate (RCA). However, the internal curing efficiency
Yuguang Mao, Jianhui Liu, Caijun Shi
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Autogenous Shrinkage Development in HPC

High Performance Materials in Bridges, 2003
This paper analyzes the influences of the amount of binder, percentage of silica fume, water-to-binder (w/b) ratio, and the types of superplasticizer, cement, and aggregate, respectively, on both autogenous and total shrinkage of high performance concrete.
Drago Saje, Franc Saje
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Chemical shrinkage and autogenous shrinkage of hydrating cement paste

Cement and Concrete Research, 1995
Abstract It is well known that the absolute volume of cement plus water decrease with progressive hydration. In this study, chemical shrinkage of cement was calculated from chemical equation of hydration, it was compared with observed one. Definition of chemical shrinkage and autogenous shrinkage was made and relationship between them was clearly ...
Ei-ichi Tazawa, Shingo Miyazawa, Tetsurou Kasai   +2 more
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Mitigation strategies for autogenous shrinkage cracking

Cement and Concrete Composites, 2004
Udgivelsesdato ...
Bentz, D.P., Jensen, Ole Mejlhede
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Autogenous Shrinkage in Plain Cement Mixtures

Key Engineering Materials, 2008
Determination of a realistic model for the estimation of autogenous shrinkage in plain cement mixtures has been an ongoing research among researchers in high performance concrete. While no standard test method exists for the determination of autogenous shrinkage, various researchers have designed different test methods for measurement of autogenous ...
Vinod Rajayogan, Obada Kayali
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Chemical shrinkage and autogenous shrinkage of Portland cement—metakaolin pastes

Advances in Cement Research, 1998
Portland cement (PC)-metakaolin (MK) pastes of compositions 0, 5, 10, 15, 20 and 25% MK and water/binder ratio 0·55 have been subjected to tests for chemical shrinkage, autogenous shrinkage and expansion during soaking. Chemical shrinkage was carried out in 200 ml containers on water-covered 12 mm thick layers of paste, and the volume changes were ...
S. Wild, J. M. Khatib, L. J. Roose
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Roadmap for autogenous shrinkage control of UHPC

2021
Ultra-high-performance concrete (UHPC) demonstrates extremely large autogenous shrinkage due to its high content of cement and very low water-to-binder ratio (w/b). Many techniques can be used to mitigate the autogenous shrinkage developed in cement-based materials. Based on their action mechanisms, they can be classified into the following categories:
Li Yang, Caijun Shi*, Zemei Wu
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Effects of triethanolamine on autogenous shrinkage and drying shrinkage of cement mortar

Construction and Building Materials, 2021
Abstract Impacts of triethanolamine (TEA) on autogenous shrinkage, drying shrinkage and strength development of cement mortars were investigated. Hydration kinetics, pore structure and microstructure of hardened cement pastes (hcps) incorporated with TEA were systematically analyzed to reveal the working mechanism of TEA.
Hui Liu, Hui Lin, Xiaoyong Liu, Jian Wang, Xiaofan Pang, Xiangming Kong   +5 more
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Factors Influencing Mitigation Strategies for Autogenous Shrinkage

Advances in Civil Engineering Materials, 2018
Abstract This research aims to answer several outstanding questions that must be addressed before internal curing materials can be commonly used in structural concrete. The wide range of possibilities for internal curing material properties can dramatically alter the effectiveness of internal curing.
B. J. Mohr, K. L. Hood
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Effect of fly ash on autogenous shrinkage

Cement and Concrete Research, 2005
The correlation between autogenous shrinkage and degree of hydration of fly ash was determined with the selective dissolution method. Then, the relationship between the degree of hydration of fly ash and autogenous shrinkage was examined. The results showed that the degree of hydration of fly ash increased as its Blaine surface area increased.
Pipat Termkhajornkit, Toyoharu Nawa, Masashi Nakai, Toshiki Saito   +3 more
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