发布时间:2025-01-29 22:52:38
粉墙沙子和水泥的比例按照体积比不小于1:3的比例配制,选用水泥是普通硅酸盐水泥强度在32.5兆帕选用的沙子最好是中河沙,调配的比例是按照体积比例进行,配比的要求是不小于1:3。如果水泥受潮结硬,就会降低甚至丧失原有强度,所以规范规定,出厂超过3个月的水泥就需要复查试验,按试验结果使用。
焊条什么是e50焊条它的标识牌上是怎么写的比如结502 j4850是什么意思
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