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集料相对密度的测定值在很大程度上影响沥青混合料的理论最大相对密度和空隙率等一系列体积指标的准确性,准确测定集料的相对密度至关重要。粗集料的表观相对密度是进行沥青混合料体积指标计算的重要参数。该文用法国规范NF P18-559“砂与砾石在石蜡油中的密度测量”和我国《公路工程集料试验规程》(JTG E42-2005)中的T0304-2005“粗集料密度与吸水率试验(网篮法)”对不同料源的粗集料进行试验,并对数据进行分析,结果表明两种方法实测的试验结果和集料本身的密度关系较大。
Aggregate relative density of the measured value to a large extent affect the theoretical maximum relative density of asphalt mixture and porosity and other accuracy of a series of volumetric index, accurate determination of aggregate relative density is essential. The apparent relative density of coarse aggregate is an important parameter for calculating the volume index of asphalt mixture. This article uses the French norms NF P18-559 “density of sand and gravel in paraffin oil ” and China Highway Engineering Aggregate Test Procedures (JTG E42-2005) T0304-2005 “coarse aggregate density And the water absorption test (basket method) ”for different sources of coarse aggregate test, and the data analysis, the results show that the two methods measured results and the aggregate itself has a greater density.