单项选择题
某一防冻剂进行检测,所测数据列于下表,计算这一防冻剂的性能指标并回答下述问题。(混凝土一次拌和30L,混凝土容重为2400kg/m3,负温温度为-10℃)
A.93% B.94% C.95% D.96%
A.121% B.120% C.119% D.118%
A.20% B.22% C.24% D.26%
A.65% B.70% C.75% D.80%
A.63% B.65% C.67% D.69%
A.3.5% B.3.6% C.3.7% D.3.8%
A.19.7% B.20.2% C.20.3% D.试验结果无效,应重做
A.I型膨胀剂 B.II型膨胀剂 C.不满足膨胀剂性能指标要求 D.新型膨胀剂
A.0.35 B.0.40 C.0.45 D.0.50
A.6% B.8% C.10% D.12%