对粗集料密度的真空饱水法测定

Coarse Aggregate Density Measurement by Vacuum-water-saturated Method

受沥青混合料的理论密度测定方法启示,对粗集料进行真空饱水密度快速测定试验。对玄武岩和石灰岩类结构致密孔隙小的岩石进行试验,试验所得密度数据与规范方法所得数据一致;砂岩由于其结构孔隙大,数据离散,需要进行多次试验,从中选出代表性数据。此方法可以在较短时间内得出集料的密度指标。

Inspired by theoretical density measuring method of asphalt mixture,rapid determination test of coarse aggregate density is made by vacuum-water-saturated method.Rocks of basalt and limestone with compact structure and small pores are tested and the test results of density are consistent with those tested by standard method.Because of its big structural pores and discrete data,sandstone should be tested repeatedly and the representative data could be chosen.By this method,aggregate density index could be gained in very short time.