A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Research on the microstructure formation of polyacrylate latex modified mortars
Highlights We establish an improved model to represent the microstructure forming process of polyacrylate polymer modified mortars. We specify the chemical reactions between PA polymer and cement hydrates. We design a simulation test to identify the reactions products in polymer modified mortars. The influence of PA polymer on the mechanical performance and pore structure was enlightened.
Abstract The microstructure forming process of polyacrylate (PA) latex modified cement-based materials was investigated from mixing to hardening. Owing to the chemical reaction between PA particles and calcium ions in the pore solution, PA polymer will not uniformly disperse in cement mortar due to its adsorption on cement particles or hydrates. As a result, PA polymer should exist in cement mortars through different morphologies. The early age mechanical properties of PA modified mortars are lower than those of unmodified mortars, while a rapid progress of the compressive strength and fracture energy can be recognized from the PA modified mortars. It was found that PA polymer addition will refine the small pores but induce big pores to cement mortar. SEM and EDX analysis proves that PA polymer is localized at some places within PA modified mortar which can be named as the localization of polymer modification. The physical and chemical influence of PA polymer on cement-based materials was integrated into an improved model.
Research on the microstructure formation of polyacrylate latex modified mortars
Highlights We establish an improved model to represent the microstructure forming process of polyacrylate polymer modified mortars. We specify the chemical reactions between PA polymer and cement hydrates. We design a simulation test to identify the reactions products in polymer modified mortars. The influence of PA polymer on the mechanical performance and pore structure was enlightened.
Abstract The microstructure forming process of polyacrylate (PA) latex modified cement-based materials was investigated from mixing to hardening. Owing to the chemical reaction between PA particles and calcium ions in the pore solution, PA polymer will not uniformly disperse in cement mortar due to its adsorption on cement particles or hydrates. As a result, PA polymer should exist in cement mortars through different morphologies. The early age mechanical properties of PA modified mortars are lower than those of unmodified mortars, while a rapid progress of the compressive strength and fracture energy can be recognized from the PA modified mortars. It was found that PA polymer addition will refine the small pores but induce big pores to cement mortar. SEM and EDX analysis proves that PA polymer is localized at some places within PA modified mortar which can be named as the localization of polymer modification. The physical and chemical influence of PA polymer on cement-based materials was integrated into an improved model.
Research on the microstructure formation of polyacrylate latex modified mortars
Tian, Ye (author) / Jin, Xian-yu (author) / Jin, Nan-guo (author) / Zhao, Ruoyi (author) / Li, Zong-jin (author) / Ma, Hong-yan (author)
Construction and Building Materials ; 47 ; 1381-1394
2013-06-12
14 pages
Article (Journal)
Electronic Resource
English
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