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[单选题]
烧结一般砖的公称尺寸为()。
A.240mm*120mm*53mm
B.240mm*115mm*53mm
C.240mm*115mm*55mm
D.240mm*120mm*60mm
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A.240mm*120mm*53mm
B.240mm*115mm*53mm
C.240mm*115mm*55mm
D.240mm*120mm*60mm
一块烧结砖,其尺寸符合要求(240×l15×53mm),当烘干至恒重时为2500g,吸水饱和后为2900g,将该砖磨细过筛,再烘干后取50g,用比重瓶测得其体积为18.5cm3试求该砖的吸水率、密度、体积密度及孔隙率。
A.5.148
B.5.219
C.6.374
D.6.462
A.5.148
B.5.219
C.6.374
D.6.462
试求该砖的表观密度、质量吸水率、开口孔隙及闭口孔隙。
。试求该砖的表观密度、质量吸水率、开口孔隙率及闭口孔隙率。