水泥路面混凝土配合比设计与耐久性研究

发布时间：2018-10-13 12:30

【摘要】：针对水泥混凝土路面耐久性问题,首先给出了脆性系数、断裂韧性与弯拉弹性模量三个评价指标,然后设计并进行了四因素(水灰比、砂率、水泥用量、水泥细度)五水平二次回归正交试验。通过实验数据分析得出结论:水泥混凝土在抵抗裂纹扩展方面最优设计配合比为水灰比:0.41;砂率:37.5%;水泥用量:406 kg/m~3;水泥细度:375 m~2/kg;水泥混凝土在刚度方面最优配合比考虑为水灰比:0.41;砂率:32%;水泥细度:300 m~2/kg;综合四因素考虑最终给出了路面水泥混凝土耐久性配合比建议范围:水灰比:0.38~0.41;砂率:35.2%~37.5%;水泥用量:390~406 kg/m~3;水泥细度:375~420 m~2/kg。
[Abstract]:Aiming at the durability of cement concrete pavement, three evaluation indexes, brittleness coefficient, fracture toughness and flexural modulus of elasticity, are given first, and then four factors (water cement ratio, sand ratio, cement content) are designed and carried out. Cement fineness) Quadratic regression orthogonal test at five levels. Through the analysis of experimental data, it is concluded that the optimum design mix ratio of cement concrete in resisting crack propagation is: water-cement ratio: 0.41; sand ratio: 37.5; cement content: 406 kg/m~3; cement fineness: 375mt / kg; optimum mix ratio of cement concrete in stiffness The ratio of water to cement is 0.41; the ratio of sand is 32; the fineness of cement is 300mg / kg; considering four factors, the suggested range of durability ratio of pavement cement concrete is finally given: water-cement ratio: 0.38 / 0.41; sand ratio: 35.2and 37.5; cement dosage: 390,406 kg/m~3; cement fineness: 375,420mg / kg; cement content: 390,406 kg/m~3; cement fineness: 375420mg / kg.
【作者单位】：湖北文理学院理工学院建筑工程系;西南大学材料与能源学部;温州大学;
【分类号】：U416.216

【相似文献】