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1试验概况1．1试验原材料:水泥采用42．5普通硅酸盐水泥;细骨料采用中粗天然河砂,级配良好;聚丙烯纤维采用洛阳某公司研制的单丝聚丙烯纤维,长度为10mm、20mm。其基本性能为:密度约为0．91g/cm~3,熔点165℃,燃点580℃,抗拉强度大于500MPa,杨氏模量大于4500MPa,不吸水,导热性低,极限延伸率15％,抗酸碱性极高,抗老化,无毒。它与水泥基相容性好,能经受水泥水化物侵蚀而自身不受损害,耐久性能好。
1 Test Overview 1.1 Test raw materials: cement 42.5 ordinary Portland cement; fine aggregate used in the coarse natural river sand, good grading; polypropylene fiber Luoyang company developed monofilament polypropylene fiber length For 10mm, 20mm. Its basic properties are as follows: the density is about 0.91g / cm ~ 3, the melting point is 165 ℃, the ignition temperature is 580 ℃, the tensile strength is more than 500MPa, the Young’s modulus is more than 4500MPa, High acid and alkali resistance, anti-aging, non-toxic. It has good compatibility with cement-based, can withstand the erosion of cement hydrate itself without damage, good durability.