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一、前言 水泥砼是一种造价较低、经久耐用、应用范围广的建筑材料,被广泛应用于建筑工程、道桥工程、地下工程、水利水电工程等领域。近几年,北京市政工程局在北京市连续建成了一批颇受世人嘱目的大型综合性市政工程,如东厢、西厢、南厢暨西北二环改造、东三环改造、西北三环改造、水源九厂、高碑店污水处理厂、永安里地铁工程等,在外埠建成了济南—青岛高速公路、淄博水厂等工程。要建成这些高标准、严要求的大型工程,仅仅采用传统的砼材料和施工
I. Preface Cement concrete is a kind of building material with low cost, long-lasting durability and wide application range. It is widely used in construction engineering, road and bridge engineering, underground engineering, water conservancy and hydropower engineering and other fields. In recent years, the Beijing Municipal Engineering Bureau has successively built a number of large-scale comprehensive municipal projects in Beijing that are attracting worldwide attention, such as the Dongxiang, Xixiang, Nanfang and North-west Second Ring Renovation, the East Third Ring Renovation, and the Northwest Third Ring Road. Renovation, Water Supply No. 9 Plant, Gaobeidian Wastewater Treatment Plant, Yonganli Subway Project, etc., Jinan-Qingdao Expressway, Zibo Waterworks and other projects have been completed in other cities. To build these large-scale projects with high standards and strict requirements, only traditional materials and construction are used.