论文部分内容阅读
为了促进混凝土构件的早期硬化、加速钢模的周转,提高预制厂的生产率,热搅拌在一些工业发达国家逐渐趋于普遍,甚至地处热带南美的巴西里约热内卢也采用了热拌工艺。同时,热混凝土也是解决寒冷地区混凝土冬季施工的有效措施。热拌混凝土温度一般为60～65℃,有以下几种加热方法。 1.加热骨料。即向贮仓中通蒸汽,这种方法热效率低,并且贮仓底部的积水对含有石灰质的骨料有不良的影响。
In order to promote the early hardening of concrete components, accelerate the turnover of steel molds, and increase the productivity of precast plants, hot agitation has gradually become common in some industrialized countries. Even Brazil, Rio de Janeiro, which is located in tropical South America, has adopted a hot mix process. At the same time, hot concrete is also an effective measure to solve the winter construction of concrete in cold regions. Hot mix concrete temperature is generally 60 ~ 65 °C, there are the following heating methods. 1. Heat the aggregate. That is, steam is fed to the storage tank. This method has low thermal efficiency, and the accumulation of water at the bottom of the storage tank has a bad influence on the aggregate containing lime.