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混凝土及钢筋混凝土是现代建筑物与构筑物的重要结构材料之一。混凝土质量是整个混凝土结构体系的生命,而混凝土强度又是混凝土质量的关键。如混凝土强度严重不足,结构的抗剪与抗震能力将急剧下降,造成严重后果。影响混凝土强度的因素很多,要确保混凝土质量,必须抓住七个环节,把住四个关口。七个环节是:(1)材料质量(水质、水泥品种与活性、骨料强度、级配及含泥量);(2)配
Concrete and reinforced concrete are one of the important structural materials for modern buildings and structures. The quality of concrete is the life of the entire concrete structural system, and the strength of concrete is the key to the quality of the concrete. If the concrete is severely deficient in strength, the shear and seismic resistance of the structure will drop sharply, causing serious consequences. There are many factors that affect the strength of concrete. To ensure the quality of concrete, it is necessary to seize the seven links and hold four junctures. The seven links are: (1) material quality (water quality, cement type and activity, aggregate strength, gradation, and clay content); (2)