活性掺合料对路面水泥混凝土性能的影响和应用研究

针对粉煤灰和硅粉等活性掺合料对路面水泥混凝土性能的影响进行了研究.采用正交法设计了十种混凝土配合比,对在标准条件下养护28天的各配比混凝土试件进行了抗折强度、抗压强度、抗渗透性能和抗冻融性能的测试,并通过回归方法建立了各指标与配合比的关系.试验结果表明,通过添加适量的粉煤灰和硅粉,可以在不降低混凝土强度的基础上有效地提高混凝土的密实性和抗渗性能,并改善其抗冻融性能.同时,再通过技术、经济比较及现场验证,得出适合当地实际情况的最佳配合比.

Influence of Active Mixtures on the Performance of Pavement Cement Concrete and Application Research

The influence of active mixtures, including fly - ash and silica fume, on the performance of pavement cement concrete was mainly researched in the paper. There were 10 mix designs of concrete using the orthogonal method. The samples were maintained for 28 days in the standard condition and then tested for bending strength, compression strength, permeability, and antifreezing, and thawing performance. The relationships of these properties and proportioning of concrete were established using a regression method. The experimental results show that adding additives of fly - ash and silica fumes can increase the density of concrete, reduce the permeability of concrete, and improve the antifreezing and thawing performance. The optimum proportioning was recommended based on the economical and technical considerations, as well as field verifications.