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我所在建筑材料研究院等单位的协助下,进行了12小时快速测定水泥强度的试验研究。该试验利用干硬性水泥净浆小试体强度发展曲线来快速测定水泥强度,具体过程如下: 以小水灰比拌制净浆,加压成型后在50℃下养护,在12小时内,12块试体按一定时间间隔破型,取其抗压强度,在强度-时间座标上,12个试体随养护时间的延长,强度也快速增长,并呈前后两段明显不同的增进速率,将这两段近似地看为直线,则这两直线就有一个明显的交点,用此交点在强度座
Under the assistance of the Institute of Building Materials and other units of our institute, a 12-hour experimental study on rapid determination of cement strength was conducted. The test uses the strength development curve of dry hard cement paste small test specimens to quickly determine the strength of cement. The specific process is as follows: The pulp is mixed with a small water-cement ratio, cured at 50°C after pressure forming, and within 12 hours, 12 The test specimens were broken at certain time intervals and their compressive strength was taken. In strength-time coordinates, the 12 test specimens increased rapidly with the extension of the curing time, and showed significant improvement rates in the two segments. Considering these two segments approximately as straight lines, the two lines have an obvious intersection point. Use this intersection point in the strength block.