砂细度模数对道面混凝土性能的影响  

Effect of Sand Fineness Modulus on Performance of Pavement Concrete

作　　者：吴永根[1] 李文哲[1] 韩照[1,2] 黄命辉[3] 付亚伟[3] 张磊 

机构地区：[1]空军工程大学机场建筑工程系 [2]93926部队 [3]空军第六空防工程处 [4]95959部队

出　　处：《空军工程大学学报（自然科学版）》2013年第4期5-8,共4页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51208506)

摘　　要：细集料的粗细程度即细度模数Mx对混凝土的、各项性能都会产生一定影响。将初始细集料进行筛分调配成细度模数分别为2.11、2.64、3.15、3.6的4种砂,在保持基准配比不变的前提下,采用这4种砂配制机场道面混凝土制并通过试验对其工作性能、抗压强度、抗折强度、抗冻性、抗渗性和耐磨性进行系统研究,找出细度模数对道面混凝土混凝土性能的影响规律,确定适合机场道面混凝土用砂的细度模数范围。结果表明:在机场道面混凝土中,细集料最佳细度模数综合考虑确定为2.64左右。细度模数此基础上偏大则强度、抗冻性、抗渗性下降较快,偏小则耐磨性下降较快。The sand thickness degree namely fineness modulus Mx of fine aggregate has some effect on vari ous performance of concrete. The initial fine aggregate is sieved into four different kinds of sand as 2.11, 2.64,3.15,3.6. By keeping the basic mix proportion unchanged, four kinds of pavement concrete are made up with these four kinds of sand,and through a lot of experiments, the workability, compressive strength, flexural strength, frost resistance,impermeability and wearing resistance of these four kinds of pavement concrete are systematically studied, the influence rules of sand fineness modules on the performance of pavement concrete are found, the fineness modules range of the sand suitable for airport pavement concrete is defined. The results show that the optimal range of fineness modules of fine aggregate is synthetically considered and determined as 2.64 or so. If the fineness modulus is over this basic range, the strength, frost resistance and impermeability will decrease rapidly, if less than that range, the wearing resistance will decrease rapidly.

关 键 词：混凝土 细集料 细度模数 工作性 强度 耐久性 抗冻性 抗渗性 耐磨性 

分 类 号：TU521.1[建筑科学—建筑技术科学]