摘要
为了探讨聚乙烯醇(PVA)在高性能水泥基材料中的作用机理,试验研究了在不同水胶比(W/B)和聚胶比(P/B)时,聚乙烯醇对抗压强度和抗折强度的影响,并通过红外光谱和X射线衍射分析了聚乙烯醇(PVA)粉体在高性能水泥基材料中的作用机理。试验结果表明:掺入适量的聚乙烯醇(PVA)可以明显提高高性能水泥基材料的强度,存在一个最佳的聚乙烯醇(PVA)掺量;在本试验条件下,在聚胶比(P/B)为2.5%时,强度最高,其抗压强度和抗折强度分别达到113.6MPa和23.0MPa;红外光谱和X射线衍射分析表明,聚乙烯醇(PVA)参与了水泥的水化,形成的化学键增强。
In order to discuss the action mechanism of polyvinyl alcohol （PVA） polymers in high performance cementbased composites （HPCBC）, the effect of polyvinyl alcohol （PVA） on the strength of high performance cement-based composites （HPCBC） with different ratio of water to binding material （W/B） and ratio of polymer to binding material （P/B） was studied, and action mechanism of polyvinyl alcohol （PVA） polymers in high performance cement-based composites （HPCBC） was also studied by infrared ray spectrum（IR） and X ray diffraction（XRD）. Results show that the strength of high performance cement-based composites （HPCBC） with addition of polyvinyl alcohol （PVA）Polymers can be improved greatly, and there exists an optimal ratio of polymer to binding material （P/B） with which the strength is upmost; in this experiment, the optimal ratio of polymer to binding material （P/B） is 2. 5%, and at this point the strength attains extremity with compressive strength and flexural strength of 113.6MPa and 23.0MPa respectively. By using infrared ray spectrum （IR） and X ray diffraction （XRD） it is found that polyvinyl alcohol （PVA） polymers chemical action works in the course of cement hydration and hardening.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第2期264-267,297,共5页
Journal of Materials Science and Engineering
关键词
高性能水泥基复合材料
聚乙烯醇
强度
红外光谱
X射线衍射
high performance cement-based composites
polyvinyl alcohol
strength, infrared ray spectrum
X-ray diffraction
