M7.5号砂浆配合比设计 [复制链接]

1,计算试配强度:u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
fm,o=f2+0.645δ=7.5+1.88×0.645=8.7Mpau¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
2,确定水泥用量:u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
1000(fm.o-β)u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
1000(8.7+15.09)u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
QC=u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
=u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
=242kg/m3 u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
α*fceu¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
3.03×32.5u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
3,确定水用量:u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
查表确定用水量为260kg/m3 u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
4,确定砂的用量:u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
用砂在干燥状态下的堆积密度值1480 kg/m3 作为砂的用量.u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
所以基准配合比确定为:水泥:砂:水=295:1480:260 u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
这个295的水泥怎么来的？u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%
用水量查表最少都是270呀。u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%

既然是配合比设计，那么是否又配合比验证，砂浆的稠度是多少？在确定水泥用量的计算中，qc的用量是242，那基准配比中的295又是从何而来的？u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%

？？？？？u¼Æˆ;ï/ޕåbbs.3c3t.comã$¶/o(¾H%