从1956年开始,我们就以粘土粒度级配方法来配土的,以下就是我们的一些做法:①配土的粒度范围。1956年我们在试验室和现场的试验结果,认为机制坯与手工坯的粒度配土是在以下范围内较好:砂粘尘机制坯 30—40% 15—20% 55—40%手工坯 45—55% 12—15% 43—25%②要根据条件决定配土。如果条件许可,使土的含砂量尽可能多些,这样作对砖坯干燥有好处。另外 Since 1956, we have been using clay grading methods to match the soil. Here are some of our practices: 1. The particle size range of the soil. In 1956, we conducted the test results in the laboratory and on the site. We believe that the particle size distribution of the machine and hand-made billets is better within the following range: sand sticky dust mechanism blanks 30-40% 15-20% 55-40% artificial blanks 45 —55% 12—15% 43—25%2 It is necessary to determine the soil according to the conditions. If the conditions permit, make the sand content of the soil as much as possible, so as to make the brick dry good. In addition