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市政建筑工程中,混凝土结构占很大比重。混凝土强度的高低,严重影响着市政建筑工程的质量。近几年,我们对现场混凝土施工进行了调查,发现不少工程的混凝土强度,程度不同的存在问题。分析起来因素很多,其中最主要因素是混凝土混合物的水灰比。大家都知道,水泥颗粒水化过程所需要的水量,一般只占水泥重量的15～25％,但是为了使混凝土混合物在施工过程中,具有浇灌的流动性、和易性,加入的水量,常常超过水泥颗粒水化所需水量的1～2倍。多加的水在混凝土混合物硬化过程中不断蒸
Municipal construction projects, a large proportion of concrete structures. The level of concrete strength, seriously affecting the quality of municipal construction projects. In recent years, we conducted a survey of on-site concrete construction and found that many projects have different strengths and degrees of concrete problems. Analysis of many factors, the most important factor is the concrete mixture of water-cement ratio. As we all know, the amount of water required for the hydration process of cement particles generally accounts for 15-25% of the weight of the cement, but in order to make the concrete mixture with watering fluidity, workability, added water amount during construction, More than 1 to 2 times the amount of water required for cement particle hydration. The extra water is continuously steaming during the hardening of the concrete mixture