【判断题】【消耗次数:1】
抗冻性要求高的混凝土,必须掺引气剂或引气减水剂。 ()
正确
错误
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相关题目
【单选题】 在混凝土中加入引气剂,可以提高混凝土的()。
①  抗冻性
②  耐水性
【判断题】 混凝土中掺入引气剂后,会引起强度降低( )。
①  正确
②  错误
【判断题】 混凝土中掺入引气剂后,会引起强度降低( )。
①  正确
②  错误
【判断题】 在混凝土中加掺合料或引气剂可改善混凝土的粘聚性和保水性.
①  正确
②  错误
【单选题】 有抗冻要求的混凝土施工时宜选择的外加剂为( )。
①  缓凝剂
②  阻锈剂
③  引气剂
④  速凝剂
【单选题】 有抗冻要求的混凝土施工时宜选择的外加剂为( )。
①  缓凝剂
②  阻锈剂
③  引气剂
④  速凝剂
【单选题】 加气砼所采用的加气剂多为( )。
①  松香胶泡沫剂
②  磨细铝粉
③  氯化胺
④  动物血加苛性钠
【判断题】 我国北方有抗冻和抗渗要求的混凝土工程宜优先选用火山灰水泥。
①  正确
②  错误
【单选题】 混凝土结构中要求充分发挥钢筋强度或对延性要求高的部位应优先选用( )级接头。
① 
②  Ⅱ、Ⅲ
③ 
④ 
【判断题】 混凝土耐久性包括:抗渗性、抗冻性,混凝土碳化、碱集料反应和抗侵蚀性。
①  正确
②  错误
随机题目
【单选题】 It is difficult for us to learn a lesson in life [] youve had that lesson.
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①  since
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①  when
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③  that
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①  or
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