C25喷射砼PHB设计:7ö(o!5)Óbbs.3c3t.comëÐIñz¡
1、水泥:42.57ö(o!5)Óbbs.3c3t.comëÐIñz¡
2、碎石:5~10、7ö(o!5)Óbbs.3c3t.comëÐIñz¡
3、砂:中砂7ö(o!5)Óbbs.3c3t.comëÐIñz¡
4、外加剂:速凝剂7ö(o!5)Óbbs.3c3t.comëÐIñz¡
PHB设计:7ö(o!5)Óbbs.3c3t.comëÐIñz¡
1、fcu,o=fcu,k+1.645=25+1.645×5=33.2MPa7ö(o!5)Óbbs.3c3t.comëÐIñz¡
2、W/C=0.457ö(o!5)Óbbs.3c3t.comëÐIñz¡
3、用水量:200kg7ö(o!5)Óbbs.3c3t.comëÐIñz¡
4、水泥:C=200/0.45=444kg7ö(o!5)Óbbs.3c3t.comëÐIñz¡
5、砂率:50%7ö(o!5)Óbbs.3c3t.comëÐIñz¡
6、砂石用量:假定容重为2200kg/m37ö(o!5)Óbbs.3c3t.comëÐIñz¡
砂:S=(2200-444-200) ×50%=778kg7ö(o!5)Óbbs.3c3t.comëÐIñz¡
石:C=2200-444-200-778=778kg7ö(o!5)Óbbs.3c3t.comëÐIñz¡
C∶W∶C∶S=7ö(o!5)Óbbs.3c3t.comëÐIñz¡
444∶220∶778∶7787ö(o!5)Óbbs.3c3t.comëÐIñz¡