普通水泥混凝土配合比参考表水泥强混凝土强度等级度等级c15c20c25c30c3532。5(R)c40c20c25c30c35c40c20c25c30c35c40c4542.5（R）c50c20c25c30c35c40c45c50c30c35c40c4552。5(R）c50c60c30c35c40c45每立方混凝土材料用量（kg∕m3）水泥3003504004504805203504054504805202903...

时间:2024-11-06 20:06栏目:行业资料