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冬季风大气温低,多霜多雪,在这种气侯条件下施工,砌体里水分不易蒸发,干燥缓慢;浇灌的混凝土,养护困难,不易硬化。如何提高冬季施工质量?采用什么方法?注意哪些事项?这里简单介绍一下。一、砖石工程的冬季施工在冬季砌筑墙体的一个突出问题是砂浆容易受冻。砂浆受冻后,会使硬化停止,不产生强度,并失去胶结作用;同时砂浆的塑性也大大降低,使灰缝的紧密性减弱。这样,解冻后在上层砌体重量压迫下就可能引起不均匀下沉,加上胶结不好还可能发生坍塌事故。为了保证施工质量,冬季砖石工程采用抗冻砂浆
Winter breeze, low temperatures, frosty and snowy, construction under such weather conditions, moisture in the masonry is not easy to evaporate, dry slowly; watered concrete, difficult maintenance, hard to harden. How to improve the quality of construction in winter? What method is used? What are the things to watch? Here’s a brief introduction. A. The Winter Construction of Masonry Projects A prominent problem in the construction of masonry walls in winter is that the mortar is susceptible to freezing. After the mortar is frozen, the hardening will stop, no strength will be generated, and cementation will be lost. At the same time, the plasticity of the mortar will be greatly reduced, and the tightness of the mortar joint will be weakened. In this way, after the thawing, under the weight of the upper masonry, the uneven sinking may be caused, and if the cementation is not good, a collapse accident may occur. In order to guarantee the quality of construction, antifreeze mortar is used in masonry in winter