活性掺合料对路面水泥混凝土性能的影响和应用研究

针对粉煤灰和硅粉活性掺合料对路面水泥混凝土性能影响进行了研究。采用正交法设计了10种混凝土配合比，对在标准条件下养护28d的各配比混凝土试件进行了抗折强度、断块抗压强度、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。

Application Research and Influence of Active Mixtures on Performances of Cement Concrete for Pavements

The influence of active mixtures, including flyash and silicon fumes on the performances of cement concrete for pavement is mainly researched in the paper. 10 sorts of mixture ratio of concrete are designed by the orthogonal method. The samples are maintained for 28 days in the standard condition and then tested for bending strength, compression strength, impermeability, and anti-freezing and thawing performances. The relationships of their indexes and mixture ratio of concrete are found by regression method, and the corresponding curves are drawn. The results show that through additives of flyash and silicon fume,compactability and impermeability of concrete are improved, and anti-freezing and thawing performance is meliorated without strength decreased. The optimum mixture ratio is recommended by comparing economy with technology and tested in-situ.