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矾土水泥混凝土在冬季施工中的养护问题,论述不多,资料较少。一般规程均规定“矾土水泥配制的混凝土,不适用蒸汽养护”。我认为这是指在常温下不能使用蒸汽养护,而低于0℃的冬季施工应属例外。矾土水泥水化反应时放出的热量比普通水泥多,并不是说,矾土水泥混凝土在0℃以下不受冻胀应力的影响。矾土水泥混凝土凝结时的环境温度应保持在4～25℃之间,当温度过低水化反应无法进行时,同样需要采取冬季施工的养护方法,以保证水泥水化反应正常进行。在这种情况下,可以采取蓄热法、电加热法和蒸汽养护法。但要注意的
There are few discussions about the conservation of alumina concrete in winter construction, and there are few data. The general rules stipulate that “the concrete formulated with alumina cement is not suitable for steam curing”. I think this means that steam curing is not allowed at room temperature, and winter construction below 0°C should be an exception. The calorific value of bauxite cement is more than that of ordinary cement in the hydration reaction. It is not that bauxite cement concrete is not affected by frost heave stress below 0°C. The ambient temperature of alumina cement concrete should be kept between 4°C and 25°C. When the temperature is too low, the hydration reaction cannot be carried out. It is also necessary to adopt the method of winter construction to ensure that the cement hydration reaction proceeds normally. In this case, heat storage, electric heating, and steam curing can be used. But pay attention to