M7.5号砂浆配合比设计 [复制链接]

1,计算试配强度:¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
fm,o=f2+0.645δ=7.5+1.88×0.645=8.7Mpa¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
2,确定水泥用量:¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
1000(fm.o-β)¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
1000(8.7+15.09)¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
QC=¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
=¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
=242kg/m3 ¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
α*fce¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
3.03×32.5¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
3,确定水用量:¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
查表确定用水量为260kg/m3 ¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
4,确定砂的用量:¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
用砂在干燥状态下的堆积密度值1480 kg/m3 作为砂的用量.¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
所以基准配合比确定为:水泥:砂:水=295:1480:260 ¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
这个295的水泥怎么来的？¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥
用水量查表最少都是270呀。¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥

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？¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥

？？？？？¡¼nŠýǒ­”bbs.3c3t.com^}Sê¶ÞÚ¥