Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Volumetric deformation of gap-graded blended cement pastes with large amount of supplementary cementitious materials
https://orcid.org/0000-0001-5783-2367
Highlights Gap-graded blended cement pastes presented comparable chemical shrinkage with Portland cement paste. Most of chemical shrinkage occurred after the formation of skeleton structure, leading to reduced autogenous shrinkage. The microstructure of gap-graded blended cement paste was dense and homogeneous. Shrinkage stress was small and uniformly distributed in gap-graded blended cement paste. Gap-graded blended cement paste presented smaller volumetric deformation and superior resistance to cracking.
Abstract In this study, volumetric deformation of gap-graded blended cement pastes with large amount of supplementary cementitous materials was investigated and compared with those of Portland cement and reference blended cement pastes. The results show that the gap-graded blended cement pastes presented a higher initial packing density, therefore smaller amount of hydration products was needed to achieve dense microstructure, resulting in smaller chemical shrinkage. Notably, most of chemical shrinkage of gap-graded blended cements was occurred after the formation of skeleton structure, thus the autogenous shrinkage of gap-graded blended cements was reduced significantly due to restraint of the skeleton structure. Further, the microstructure of gap-graded blended cement pastes was dense and homogeneous due to grain size refinement and significant hydration of GBFS, and shrinkage stress was small and uniformly distributed. As a result, gap-graded blended cement pastes presented smaller volumetric deformation and superior resistance to cracking than Portland cement and reference cement pastes.
Volumetric deformation of gap-graded blended cement pastes with large amount of supplementary cementitious materials
https://orcid.org/0000-0001-5783-2367
Highlights Gap-graded blended cement pastes presented comparable chemical shrinkage with Portland cement paste. Most of chemical shrinkage occurred after the formation of skeleton structure, leading to reduced autogenous shrinkage. The microstructure of gap-graded blended cement paste was dense and homogeneous. Shrinkage stress was small and uniformly distributed in gap-graded blended cement paste. Gap-graded blended cement paste presented smaller volumetric deformation and superior resistance to cracking.
Abstract In this study, volumetric deformation of gap-graded blended cement pastes with large amount of supplementary cementitous materials was investigated and compared with those of Portland cement and reference blended cement pastes. The results show that the gap-graded blended cement pastes presented a higher initial packing density, therefore smaller amount of hydration products was needed to achieve dense microstructure, resulting in smaller chemical shrinkage. Notably, most of chemical shrinkage of gap-graded blended cements was occurred after the formation of skeleton structure, thus the autogenous shrinkage of gap-graded blended cements was reduced significantly due to restraint of the skeleton structure. Further, the microstructure of gap-graded blended cement pastes was dense and homogeneous due to grain size refinement and significant hydration of GBFS, and shrinkage stress was small and uniformly distributed. As a result, gap-graded blended cement pastes presented smaller volumetric deformation and superior resistance to cracking than Portland cement and reference cement pastes.
Volumetric deformation of gap-graded blended cement pastes with large amount of supplementary cementitious materials
https://orcid.org/0000-0001-5783-2367
Highlights Gap-graded blended cement pastes presented comparable chemical shrinkage with Portland cement paste. Most of chemical shrinkage occurred after the formation of skeleton structure, leading to reduced autogenous shrinkage. The microstructure of gap-graded blended cement paste was dense and homogeneous. Shrinkage stress was small and uniformly distributed in gap-graded blended cement paste. Gap-graded blended cement paste presented smaller volumetric deformation and superior resistance to cracking.
Abstract In this study, volumetric deformation of gap-graded blended cement pastes with large amount of supplementary cementitous materials was investigated and compared with those of Portland cement and reference blended cement pastes. The results show that the gap-graded blended cement pastes presented a higher initial packing density, therefore smaller amount of hydration products was needed to achieve dense microstructure, resulting in smaller chemical shrinkage. Notably, most of chemical shrinkage of gap-graded blended cements was occurred after the formation of skeleton structure, thus the autogenous shrinkage of gap-graded blended cements was reduced significantly due to restraint of the skeleton structure. Further, the microstructure of gap-graded blended cement pastes was dense and homogeneous due to grain size refinement and significant hydration of GBFS, and shrinkage stress was small and uniformly distributed. As a result, gap-graded blended cement pastes presented smaller volumetric deformation and superior resistance to cracking than Portland cement and reference cement pastes.
Volumetric deformation of gap-graded blended cement pastes with large amount of supplementary cementitious materials
Zhang, Tongsheng (Autor:in) / Gao, Peng (Autor:in) / Luo, Ruifeng (Autor:in) / Wei, Jiangxiong (Autor:in) / Yu, Qijun (Autor:in)
Construction and Building Materials ; 54 ; 339-347
19.12.2013
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2014