钢筋混凝土的制备及防腐蚀新技术研究动向

RECENT DEVELOPMENT OF NEW TECHNOLOGIES FOR PREPARATION AND ANTI-CORROSION OF REINFORCED CONCRETE

近20年来所开发的高强度混凝土构件,使得采用混凝土构件来修建以往仅能采用钢结构才能建造的高层建筑物成为可能,且这种高强度混凝土构件的固化不需要采用传统的振动技术。与混凝土制备技术发展相对应,混凝土在质量方面也出现了一系列问题如混凝土的开裂、混凝土内钢筋的腐蚀及混凝土中碱骨料反应等。本文就混凝土构件存在的钢筋腐蚀问题以及延长混凝土构件的使用寿命,概述了混凝土制备新技术及防腐蚀技术的研究动向。

Recent development of high-strength concrete enables high-rise buildings being constructed by concrete instead of steel. A kind of new concrete, that does not need vibration consolidation, a necessary technique in traditional construction, has been developed. During such development of concrete technologies in the past 20 years, some quality problems such as cracking of concrete, corrosion of steel reinforcements and alkali-aggregate reaction have been met. In this paper, those problems of concrete engineering are discussed and corrosion protection technology for prolonging the life time of concrete structures is introduced.