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首页> 外文会议>International symposium on cement concrete >Evaluation of Telechelic Polymer Microcrystal Materials for Performance of In-situ Toughening Concrete
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Evaluation of Telechelic Polymer Microcrystal Materials for Performance of In-situ Toughening Concrete

机译：对遥理聚合物微晶材料的评价，以便原位增韧混凝土性能

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摘要

The siloxane-terminated telechelic polymer microcrystal materials were synthesized by a combination of interfacial polymerization and sol-gel process with the purpose of improving toughness of concrete structures. Polymer molecule grew up on an aqueous/liquid interface to form a kind of crystal structure with high orientation degree during the preparation process. The surface layers of polymer molecule were modified by siloxane telechelic oligomer. The influence of telechelic polymer microcrystal materials on workability and mechanical performance of concrete were studied experimentally. The morphology of microcrystal materials and microstructure of hardened concrete were observed by scan electron microscope (SEM). The results show that concrete toughness have been greatly improved by polymer microcrystal materials. 7d fracture energy ratios of concrete increase by 56.4%. The siloxaneterminated telechelic polymer microcrystal materials toughen concrete up by in-situ effect, which take place because of Chemical interaction and Intercalation between polymers and calcium silicate hydrate (C-S-H) inorganic sheets due to the presence of siloxane groups and filling up the internal pore of concrete with polymer microcrystal physically and chemically.
机译：通过界面聚合和溶胶 - 凝胶工艺的组合合成硅氧烷封端的遥聚合物微晶材料，其目的是提高混凝土结构的韧性。聚合物分子在水/液界面上长大，形成具有高取向度的晶体结构，在制备过程中具有高取向度。聚合物分子的表面层通过硅氧烷释放寡聚体改性。实验研究了遥聚合物微晶材料对混凝土的可加工性和机械性能的影响。扫描电子显微镜（SEM）观察微晶材料的形态和硬化混凝土的微观结构。结果表明，聚合物微晶材料具有大大提高了混凝土韧性。 7D混凝土的裂缝能量比增加56.4％。硅氧烷化型卵状聚合物微晶材料通过原位效应来增韧混凝土，这是由于硅氧烷基团的存在和填充混凝土内部孔的聚合物和硅酸钙水合物（CSH）无机片之间的化学相互作用和嵌入聚合物微晶物理和化学上。

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