齐齐哈尔市地处祖国北疆,最低气温达到零下38℃,客观条件迫使我们摸索一些冬季施工经验。现根据我的体验,谈谈冬季怎样砌筑毛石。一、砂浆1.冬季砌筑毛石采用抗冻砂浆。所谓抗冻砂浆就是在水泥砂浆中掺入适当数量的盐。这种砂浆的优点是砌体在一定的负温下不致冻结,同时砂浆能继续增长强度,与毛石之间有较高的粘结力。掺盐数量见下表。 Qiqihar City is located in the northern part of the motherland, the minimum temperature reached minus 38 °C, and the objective conditions forced us to explore some winter construction experience. Now based on my experience, talk about how to build rubble in winter. 1. Mortar 1. Frost-resistant masonry mortar used in winter. The so-called frost-resisting mortar is to incorporate an appropriate amount of salt in the cement mortar. The advantage of this type of mortar is that the masonry does not freeze at a certain negative temperature, while the mortar can continue to increase its strength and have a high adhesion force with the rubble. The amount of salt added is shown in the table below.