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在混凝土的冬季施工中,电热法、暖棚法、蓄热法等费用昂贵,而采用掺混凝土防冻外加剂的施工方法则不但能使工程造价大大降低,而且使用方便。掺混凝土防冻外加剂的施工方法将是今后建筑行业冬季施工发展的主要方向。现将国内几种具有发展前途的混凝土防冻外加剂介绍如下: 1.K_2CO_3 型防冻外加剂 K_2CO_3 型复合防冻外加剂是所有无机盐中使用效果最好的一种。当把这种防冻外加剂按一定比例掺入混凝土或水泥砂浆后,能使混凝土及水泥砂浆的冰点值大大降低。
In the winter construction of concrete, the electric heating method, the warm greenhouse method, the thermal storage method and the like are expensive, and the use of a concrete-mixed antifreeze admixture construction method not only can greatly reduce the project cost, but also is convenient to use. The construction method of concrete mixed with anti-freezing admixture will be the main direction for the construction of winter construction in the future. Several antifreeze admixtures with concrete development prospects in China are introduced as follows: 1. K_2CO_3 antifreeze admixture K_2CO_3 antifreeze admixture is the best one for all inorganic salts. When this antifreeze admixture is incorporated into concrete or cement mortar in a certain proportion, the freezing point of concrete and cement mortar can be greatly reduced.