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Corrosion protection performance of High Performance Fiber Reinforced Cement Composites as a repair material

机译：高性能纤维增强水泥复合材料作为修补材料的耐腐蚀性能

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摘要

This paper regards the corrosion protection performance of High Performance Fiber Reinforced Cement Composites (HPFRCC) as a repair material. For the purpose of improving workability, the volumetric fiber content in HPFRCC was decreased from its usual rate of 1.5% to as low as 0.75%. The applicability of HPFRCC as a repair material for preventing steel corrosion was investigated using specimens that simulated either surface coating repair or patch repair. The results can be summarized as follows: Patch repair with HPFRCC to depths beyond the backside of the reinforcement effectively suppressed chloride penetration and prevented reinforcement corrosion, whereas surface coating with HPFRCC could not prevent corrosion of the steel in the RC substrate. As long as the fiber content is set so that only fine cracks are formed under service conditions, differences in fiber content did not affect the corrosion preventing performance of HPFRCC as a repair material.
机译：本文将高性能纤维增强水泥复合材料（HPFRCC）的防腐性能视为一种修复材料。为了提高可加工性，HPFRCC中的体积纤维含量从通常的1.5％降低至0.75％。使用模拟表面涂层修复或补丁修复的样品研究了HPFRCC作为预防材料腐蚀的修复材料的适用性。结果可归纳如下：用HPFRCC补片修复至补强物背面以外的深度可有效抑制氯化物渗透并防止补强物腐蚀，而HPFRCC的表面涂层则无法防止RC基材中的钢腐蚀。只要设定纤维含量使得在使用条件下仅形成细小裂纹，纤维含量的差异就不会影响作为修补材料的HPFRCC的防腐蚀性能。

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