Investigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials

Nano calcium silicate hydrate (nano-C–S–H) has become a novel additive for advanced cement-based materials. In this paper, the effect of nano-C–S–H on the early-age performance of cement paste has been studied, and some micro-characterization methods were used to measure the microstructure of nano-C...

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Autores principales:	He Wei, Liao Gang
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	nano-c–s–h cement paste workability compressive strength microstructure Technology T Chemical technology TP1-1185 Physical and theoretical chemistry QD450-801
Acceso en línea:	https://doaj.org/article/ade1b9cf1d8f47ae9cec219e1a937f43
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spelling	oai:doaj.org-article:ade1b9cf1d8f47ae9cec219e1a937f432021-12-05T14:10:58ZInvestigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials2191-909710.1515/ntrev-2021-0095https://doaj.org/article/ade1b9cf1d8f47ae9cec219e1a937f432021-10-01T00:00:00Zhttps://doi.org/10.1515/ntrev-2021-0095https://doaj.org/toc/2191-9097Nano calcium silicate hydrate (nano-C–S–H) has become a novel additive for advanced cement-based materials. In this paper, the effect of nano-C–S–H on the early-age performance of cement paste has been studied, and some micro-characterization methods were used to measure the microstructure of nano-C–S–H-modified cement-based material. The results showed that the initial fluidity of cement paste was improved after addition of nano-C–S–H, but the fluidity gradual loss increased with the dosage of nano-C–S–H. The autogenous shrinkage of cement paste can be reduced by up to 42% maximum at an appropriate addition of nano-C–S–H. The mechanical property of cement paste was enhanced noticeably after adding nano-C–S–H, namely, the compressive strengths were improved by 52% and 47.74% at age of 1 day and 7 days, respectively. More hydration products were observed and pore diameter of cement matrix was refined after adding nano-C–S–H, indicating that the early hydration process of cement was accelerated by nano-C–S–H. This was mainly attributed to seed effect of nano-C–S–H. The detailed relationship between microstructure and early-age performance was also discussed.He WeiLiao GangDe Gruyterarticlenano-c–s–hcement pasteworkabilitycompressive strengthmicrostructureTechnologyTChemical technologyTP1-1185Physical and theoretical chemistryQD450-801ENNanotechnology Reviews, Vol 10, Iss 1, Pp 1374-1382 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nano-c–s–h cement paste workability compressive strength microstructure Technology T Chemical technology TP1-1185 Physical and theoretical chemistry QD450-801
spellingShingle	nano-c–s–h cement paste workability compressive strength microstructure Technology T Chemical technology TP1-1185 Physical and theoretical chemistry QD450-801 He Wei Liao Gang Investigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials
description	Nano calcium silicate hydrate (nano-C–S–H) has become a novel additive for advanced cement-based materials. In this paper, the effect of nano-C–S–H on the early-age performance of cement paste has been studied, and some micro-characterization methods were used to measure the microstructure of nano-C–S–H-modified cement-based material. The results showed that the initial fluidity of cement paste was improved after addition of nano-C–S–H, but the fluidity gradual loss increased with the dosage of nano-C–S–H. The autogenous shrinkage of cement paste can be reduced by up to 42% maximum at an appropriate addition of nano-C–S–H. The mechanical property of cement paste was enhanced noticeably after adding nano-C–S–H, namely, the compressive strengths were improved by 52% and 47.74% at age of 1 day and 7 days, respectively. More hydration products were observed and pore diameter of cement matrix was refined after adding nano-C–S–H, indicating that the early hydration process of cement was accelerated by nano-C–S–H. This was mainly attributed to seed effect of nano-C–S–H. The detailed relationship between microstructure and early-age performance was also discussed.
format	article
author	He Wei Liao Gang
author_facet	He Wei Liao Gang
author_sort	He Wei
title	Investigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials
title_short	Investigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials
title_full	Investigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials
title_fullStr	Investigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials
title_full_unstemmed	Investigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials
title_sort	investigation of the early-age performance and microstructure of nano-c–s–h blended cement-based materials
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/ade1b9cf1d8f47ae9cec219e1a937f43
work_keys_str_mv	AT hewei investigationoftheearlyageperformanceandmicrostructureofnanocshblendedcementbasedmaterials AT liaogang investigationoftheearlyageperformanceandmicrostructureofnanocshblendedcementbasedmaterials
_version_	1718371562560684032

Investigation of the early-age performance and microstructure of nano-C–S–H blended cement-based materials

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