在20世纪,因为现场搅拌混凝土的工地很多,工地上常用最大公称粒径40mm的粗骨料,所以建设监管部门对于错误使用100 mm×100 mm×100 mm试模的做法进行了大力纠正。整顿后行业开始普遍使用150mm×150mm×150mm试模。由 In the 20th century, due to the large number of sites for mixing concrete on site and the use of coarse aggregate with a maximum nominal size of 40 mm on the construction site, the construction regulatory authorities vigorously corrected the erroneous use of 100 mm × 100 mm × 100 mm test molds. After the rectification industry began to generally use 150mm × 150mm × 150mm test mode. by