为了防止混凝土发生裂缝，许多大体积混凝土在设计中提出抗裂要求，干缩是混凝土抗裂能力的重要指标。
In order to prevent the crack of concrete, many mass concrete takes dry shrinkage as an important index of crack resistance.
系统测试了单掺聚丙烯纤维、单掺膨胀剂和双掺聚丙烯纤维与膨胀剂对混凝土空心砌块抗渗性能和湿胀干缩的影响规律。
The influence of shrinkage-reducing agent, polypropylene fiber and expansion agent on strength and dry shrinkage of the concrete were systematically tested.
抗冻强度损失率也要低于豆罗砂混凝土，干缩情况也要比豆罗砂混凝土好的多；
The anti-frozen intensity loss factor must be lower than the Douluo granulated substance concretes, and the air shrinkage situation much better than Douluo granulated substance concretes;
抗冻强度损失率也要低于豆罗砂混凝土，干缩情况也要比豆罗砂混凝土好的多；
The anti-frozen intensity loss factor must be lower than the Douluo granulated substance concretes, and the air shrinkage situation much better than Douluo granulated substance concretes;
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