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为快速和准确地进行沥青混合料配合比设计,提出了采用真空法替代网篮法测定粗集料的相对密度。首先通过分析真空法与网篮法试验的特点,得出真空法的试验原理;其次通过对不同类型粗集料相对密度的测试,分析了真空法试验的准确性和稳定性;最后与常规网篮法进行对比试验,研究得出真空法替代网篮法的试验条件(真空度和保压时间)。研究结果表明:采用真空法替代网篮法,可以快速、准确和稳定地测定粗集料相对密度,缩短试验时间,提高工作效率。
In order to quickly and accurately design the mix proportion of asphalt mixture, the relative densities of coarse aggregates by vacuum method instead of net basket method were proposed. First of all, through the analysis of the characteristics of the vacuum method and the basket method, the experimental principle of the vacuum method is obtained. Secondly, the relative density of the different types of coarse material is tested, and the accuracy and stability of the vacuum method are analyzed. Finally, Basket method comparative test, the study obtained the vacuum test method instead of the basket method (vacuum and dwell time). The results show that the relative density of coarse aggregate can be measured rapidly, accurately and stably by shortening the test time and increasing the work efficiency by adopting the vacuum method instead of the net basket method.