一、前言国内外已广泛应用煤灰砾石混凝土。我区早在1959年修建西津水电站时就已用过掺煤渣的煤渣砾石混凝土。此后,十多年来先后在拉浪、拔贡、青狮潭水电站和宜山火电厂,桂林第二火电厂施工期间大量使用用掺煤灰的煤灰砾石混凝土,上述电站均已建成投产,使用效果良好。使用煤灰砾石混凝土的意义是:可大量节省水泥,降低工程造价,节省国家资金;尤 I. Preface Coal ash gravel concrete has been widely used at home and abroad. As early as 1959, I built the Xijin Hydropower Station, which used cinder-gravel concrete. Since then, more than a decade has spent a lot of lime-fly ash-gravel concrete during the construction of Lailang, Bagong, Qingshitan Hydropower Station and Yishan Thermal Power Plant and Guilin No.2 Thermal Power Plant. All these power plants have been completed and put into production. Good effect. The significance of the use of fly ash gravel concrete is: can save a lot of cement, reduce construction costs, save the state funds; especially