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1.渗铝钢筋 (1) 普通钢筋的烧蚀和胀粗五十年代后期,电厂锅炉广泛采用耐火混凝土代替砌砖结构以来,框架式炉墙和敷管式炉墙的高温部位,都会出现过耐火混凝土沿普通钢筋(三号钢)网格开裂,或沿网架层平面剖裂,甚至崩落等现象。作者在一些工程中还发现,即令混凝土本身配料和浇注工艺符合技术要求,并采取在钢筋表面涂沥青涂层的措施,但仍不能避免耐火混凝土的早
1. Aluminized rebar (1) ablation and bulging ordinary rebar In the late 1950s, power plant boilers widely used in place of brick-fired refractory concrete structure, the high temperature parts of the furnace wall and pipe wall, there will be Refractory concrete along ordinary rebar (No. 3 steel) grid cracking, or fracture along the network plane fracture, or even collapse and so on. In some projects, the author also found that if the concrete ingredients and pouring process meet the technical requirements and adopt the method of applying asphalt coating on the surface of the steel bar, the early stage of refractory concrete can not be avoided