M7.5号砂浆配合比设计 [复制链接]

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