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我处试验室采用比色法测定沥青混合料中的油石比,测得结果比较准确,方法简便,速度快。现将试验方法介绍如下: 一、原理:根据沥青或渣油99％以上能溶解于苯中,并能因含量的不同显示出由浅黄到深褐色的不同颜色,石料则不能溶解在苯中的原理。可按不同沥青或渣油含量,做成标准比色列。再取一定数量的混合料,置于带塞三角烧瓶中,加入定量的苯,使沥青或渣油全部溶解在苯中。取出一定数量的沥青苯液,加入同样容量的比色管中,稀释后与标准比色列进行比色,找出颜色相同者,取其沥青含量,通过计算,可直接求出混合料中的油石比来。
Our laboratory using colorimetric determination of asphalt mixture in the stone ratio, the measured results more accurate, the method is simple and fast. Now the test methods are described below: First, the principle: According to asphalt or residue more than 99% can be dissolved in benzene, and because of the different content shows a different color from light yellow to dark brown, the stone can not be dissolved in benzene principle. According to different asphalt or residue content, made of standard colorimetric column. Then take a certain amount of mixture, placed in a conical flask with stopper, adding a fixed amount of benzene, the asphalt or residue all dissolved in benzene. Remove a certain amount of bitumen benzene liquid, add the same capacity of the colorimetric tube, after dilution with the standard colorimetric colorimetric to identify the same color, take the asphalt content, calculated directly through the mixture Whetstone than ever.