利用隧道玄武岩洞渣加工机制砂混凝土研究

依托云南省杨柳至宣威高速公路项目,通过室内正交试验,研究机制砂掺量、水胶比、粉煤灰掺量、钢渣掺量等因素对混凝土坍落度和扩展度的影响;对比分析不同阶数拟合函数的预测效果,采用三阶非线性函数建立并验证了机制砂混凝土坍落度和扩展度的预测模型.研究表明:水胶比和粉煤灰掺入量对扩展度和坍落度影响较大,钢渣影响较小;随着水胶比、粉...

On Investigation and Processing of Machine-made Sand Concrete with Tunnel Slag Basalt

Based on the project of Yangliu—Xuanwei expressway inYunnan, through the laboratory orthogonal test, the effects of the mixing amount of machine-made sand, water-binder ratio, fly ash and steel slag on the slump and expansion of the concrete have been studied. The prediction effects of different order fitting functions on slump and expansion are compared and analyzed, and the third-order nonlinear function is used to establish and verify the prediction models of slump and expansion of machine-made sand concrete. The results show that the water-binder ratio and the incorporation of fly ash have great influence on the expansion and slump of concrete, while the steel slag has little influence on it. With the increase of water-binder ratio, fly ash and steel slag, the slump and expansion of concrete gradually increase. With the increase of the amount of machine-made sand and the proportion of sand, the slump and expansion of concrete increase first and then decrease which indicates there is an optimal value of machine-made sand concrete sand ratio and the amount of sand mixed.