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研究了混凝土保护层的开裂时间及开裂时钢筋的锈蚀范围、钢筋锈蚀层平均厚度和锈蚀引起混凝土开裂的内压应力
The cracking time of concrete cover and the corrosion range of steel bar during cracking were studied. The average thickness of rust layer and the internal compressive stress of concrete caused by corrosion