Results 241 to 250 of about 552,793 (295)
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ACI Materials Journal, 2001
This research investigated problems that have occurred when high-range, water-reducing admixtures have been used with various cements. The literature survey showed that prior work indicated that the problems were caused by the specific surface area, sulfate morphology, and aluminate content of the cements. The experimental work involved a comprehensive
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This research investigated problems that have occurred when high-range, water-reducing admixtures have been used with various cements. The literature survey showed that prior work indicated that the problems were caused by the specific surface area, sulfate morphology, and aluminate content of the cements. The experimental work involved a comprehensive
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Construction and Building Materials, 2019
Zinc oxide nanoparticles (nano-ZnO) were dispersed uniformly into cement paste by using ultrasonic treatment, and the effects of nano-ZnO on the setting time, strengths, hydration, and microstructure of the cement paste were investigated. The addition of
Jin-tao Liu +3 more
semanticscholar +1 more source
Zinc oxide nanoparticles (nano-ZnO) were dispersed uniformly into cement paste by using ultrasonic treatment, and the effects of nano-ZnO on the setting time, strengths, hydration, and microstructure of the cement paste were investigated. The addition of
Jin-tao Liu +3 more
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Composites Part B: Engineering, 2019
Styrene-butadiene rubber (SBR) latex is beneficial to the workability of cement-based materials, but the mechanism remains unclear. This study aims to investigate the effect of SBR latex on the rheological property and pore structure of cement paste. The
Keke Sun +3 more
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Styrene-butadiene rubber (SBR) latex is beneficial to the workability of cement-based materials, but the mechanism remains unclear. This study aims to investigate the effect of SBR latex on the rheological property and pore structure of cement paste. The
Keke Sun +3 more
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Influence of mineral admixtures on carbonation curing of cement paste
Construction and Building Materials, 2019This paper aims to investigate the influences of limestone powder, fly ash and ground granulated blast-furnace slag (GGBS) on carbonation curing of cement pastes.
L. Qin, Xiaojian Gao, Tiefeng Chen
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Carbonation-cementation of recycled hardened cement paste powder
Construction and Building Materials, 2018Abstract Well-hydrated cement paste powder was prepared to imitate recycled hardened cement paste powder. Compacted blocks were formed with the powder, and subjected to carbonation at different CO2 pressures. The effects of water/powder (w/p) ratio and compacting pressure in block preparation, and the CO2 pressure on the carbonation degree and ...
Chenhui Zhu, Yonghao Fang, Hua Wei
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Construction and Building Materials, 2019
Different amounts of multi-walled carbon nanotubes (MWCNTs) and graphene were homogeneously dispersed into cement paste by applying efficient surfactant and ultrasonic treatment. Subsequently, their influences on the compressive and fracture toughness of
Jin-tao Liu +3 more
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Different amounts of multi-walled carbon nanotubes (MWCNTs) and graphene were homogeneously dispersed into cement paste by applying efficient surfactant and ultrasonic treatment. Subsequently, their influences on the compressive and fracture toughness of
Jin-tao Liu +3 more
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Predicting Cement–Admixture Incompatibilities with Cement Paste Rheology
Transportation Research Record: Journal of the Transportation Research Board, 2012The complex interaction between cement and the chemical and mineral admixtures in concrete mixture sometimes causes unpredictable concrete performance in the field, generally defined as concrete incompatibilities. Cement paste rheology measurements—rather than traditional workability tests—can effectively detect these incompatibilities in concrete ...
Anal K. Mukhopadhyay, Sehoon Jang
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Construction and Building Materials, 2018
Recovering aggregates from recycled concrete produces a large amount of powder, which contains hardened cement paste and is classified as a corrosive hazardous material. This study used CO2 to treat hardened cement paste powder and to investigate how the
Bao Lu, C. Shi, Jiake Zhang, Jiyun Wang
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Recovering aggregates from recycled concrete produces a large amount of powder, which contains hardened cement paste and is classified as a corrosive hazardous material. This study used CO2 to treat hardened cement paste powder and to investigate how the
Bao Lu, C. Shi, Jiake Zhang, Jiyun Wang
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Analytical Electron Microscopy of Cement Pastes: II, Pastes of Portland Cements and Clinkers
Journal of the American Ceramic Society, 1980Three hundred sixty‐five particles of C‐S‐H, Ca(OH) 2 , AFm phase, and AFt phase from pastes of normally ground portland cements and of finely ground cements and clinkers were analyzed. All the phases, except the Ca(OH) 2 , showed significant variation ...
E. E. LACHOWSKI +3 more
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Using Dehydrated Cement Paste as New Type of Cement Additive
ACI Materials Journal, 2013This paper presents an experimental study, including evaluation and modification, on using dehydrated cement paste (DCP) as a new type of cement additive. After a series of processes, normal DCP (N-DCP) was produced as before and a modified form of DCP (M-DCP) was produced as well. The cementitious characteristics of the groups with different kinds and
Yu, R., Shui, Z.H., Dong, J
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