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《Journal of Materials Science and Engineering》 2008-02
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Analysis of action mechanism of PVA Polymers on High Performance Cement-Based Composites

XI Xiao-lin1, 2,FANG Man-man1, 2,WEN Zi-yun1, 2,YIN Qi1,LIN Dong1, 2,WANG Heng-chang1, 2,JIANG He1,PANG Zhi-yong1(1. School of Material Science and Engineering, South China University of Technology, Guangzhou 510640, China; 2. Key Laboratory of Specially Functional Materials and Manufacturing Technology of Ministry of Education, South China University of Technology, Guangzhou 510640, China)  
In order to discuss the action mechanism of polyvinyl alcohol (PVA) polymers in high performance cement-based 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.
【CateGory Index】: TQ172.4
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