1,计算试配强度:É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
fm,o=f2+0.645δ=7.5+1.88×0.645=8.7MpaÉ>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
2,确定水泥用量:É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
1000(fm.o-β)É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
1000(8.7+15.09)É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
QC=É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
=É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
=242kg/m3 É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
α*fceÉ>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
3.03×32.5É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
3,确定水用量:É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
查表确定用水量为260kg/m3 É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
4,确定砂的用量:É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
用砂在干燥状态下的堆积密度值1480 kg/m3 作为砂的用量.É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
所以基准配合比确定为:水泥:砂:水=295:1480:260 É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
这个295的水泥怎么来的?É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´
用水量查表最少都是270呀。É>f1!*Oõxbbs.3c3t.comÕçmkÀÝ´