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沥青原材料试验的注意问题
来源：/ 日期：2023-07-19
一、沥青试样准备事项
1、 Preparation of asphalt samples
(1)沥青在装卸、运输和贮存过程中混入水和异物，会影响以后试验检测的结果。操作原理是通过加热和过筛方式，将水分和异物分别除去。操作时注意温度控制，避免因温度过高造成沥青老化。
(1) Mixing water and foreign objects into asphalt during loading, unloading, transportation, and storage can affect the results of future testing and detection. The operating principle is to remove moisture and foreign objects separately through heating and sieving. Pay attention to temperature control during operation to avoid asphalt aging caused by excessive temperature.
(2)为避免因多次加热造成沥青老化，每次制样前需清楚将要做的试验项目，一次性将沥青样品制备出来，并按要求灌模成型。
(2) To avoid asphalt aging caused by repeated heating, it is necessary to clarify the test items to be conducted before each sample preparation. The asphalt sample should be prepared in one go and molded according to the requirements.
二、沥青密度与相对密度试验
2、 Asphalt density and relative density test
(1)凡涉及密度瓶在盛满物体时的称重，都要对密度瓶进行恒温操作，以达到更加精确的测定结果。
(1) When weighing a density bottle when it is filled with an object, a constant temperature operation must be performed on the density bottle to achieve more accurate measurement results.
(2)同一试样应平行试验两次，当两次试验结果的差值符合重复性试验的精密度要求时，以平均值作为沥青的密度试验结果，并准确3位小数，试验报告应注明试验温度。对黏稠及液体沥青，重复性试验的允许差为0.003g/cm3，复现性试验的允许差为0.007g/cm3;对固体沥青，重复性试验的允许差为0.01g/cm3，复现性试验的允许差为0.02g/cm3。
(2) The same sample should be tested twice in parallel. When the difference between the two test results meets the precision requirements of the repeatability test, the average value should be used as the density test result of the asphalt, accurate to three decimal places. The test report should indicate the test temperature. For viscous and liquid asphalt, the allowable deviation for repeatability testing is 0.003g/cm3, and the allowable deviation for reproducibility testing is 0.007g/cm3; For solid asphalt, the allowable deviation for repeatability testing is 0.01g/cm3, and the allowable deviation for reproducibility testing is 0.02g/cm3.
(3)密度瓶的水值应经常校正，一般每年少进行一次。
(3) The water value of the density bottle should be regularly corrected, usually at least once a year.
(4)抽真空不宜过快，防止样品被带出密度瓶。
(4) The vacuum should not be pumped too quickly to prevent the sample from being taken out of the density bottle.
三、下面济南沥青生产厂家再来讲讲沥青针入度试验说明与注意问题
3、 Next, let's talk about the asphalt penetration test instructions and precautions for Jinan asphalt manufacturers
(1)针入度试验的三项关键性条件分别是温度、测试时间和针的质量，如这三项试验条件控制不准，将严重影响试验结果的准确性。三项条件常用状态，也就是标准状态为:温度25℃、测试时间5s、针的质量100g。
(1) The three key conditions for penetration testing are temperature, testing time, and needle quality. If these three test conditions are not controlled properly, it will seriously affect the accuracy of the test results. The common state of the three conditions, that is, the Standard state is: temperature 25 ℃, test time 5s, needle mass 100g.
(2)测定针入度值大于200的沥青试样时，少用3支标准针，每次试验后将针留在试样中，直3次平行试验完成后，才能将标准针一并取出。
(2) When measuring asphalt samples with a penetration value greater than 200, at least three standard needles should be used. After each test, the needles should be left in the sample until three parallel tests are completed before the standard needles can be taken out together.
(3)当试验结果小于50(0.1mm)时，重复性试验的允许差为2(0.1mm)，复现性试验的允许差为4(0.1mm);当试验结果等于或大于50(0.1mm)时，重复性试验的允许差为平均值的4%，复现性试验的允许差为平均值的8%。
(3) When the test result is less than 50 (0.1mm), the allowable difference for repeatability testing is 2 (0.1mm), and the allowable difference for reproducibility testing is 4 (0.1mm); When the test result is equal to or greater than 50 (0.1mm), the allowable difference for repeatability testing is 4% of the average value, and the allowable difference for reproducibility testing is 8% of the average value.
That's all for the relevant content on the precautions for asphalt raw material testing. I hope it can be helpful to you. For more information, please come to our website consulting service
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