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高性能混凝土的抗火性能比普通混凝土差,在混凝土中加入聚丙烯纤维可作为一种有效的混凝土温差补偿抗裂手段。通过大量高温和力学试验,研究了聚丙烯纤维在不同温度下对矿渣和硅灰高性能混凝土的抗压、抗折的影响,并发现对不同力学指标的纤维的作用相差很大。
High-performance concrete fire resistance than ordinary concrete worse, adding polypropylene fiber in concrete can be used as an effective concrete temperature compensation means of anti-cracking. Through a lot of high temperature and mechanical tests, the effect of polypropylene fiber on the compressive strength and flexural resistance of slag and silica fume high performance concrete at different temperatures was studied. It was found that the effect of fibers with different mechanical indexes was quite different.