所属单位：材料科学与工程学院

发表刊物：construction and building materials

关键字：中文关键字：混凝土；裂缝渗漏；吸水性树脂，英文关键字：concrete; leakage through cracks; super-absorbent

摘要：Concrete leakage through cracks is a key factor resulting in the deterioration of concrete structures. This work presented a method to repair concrete leakage through cracks by synthesizing super-absorbent resin (SAR) in situ. The procedures of this method are to inject the precursor solution of polymer(acrylic acid-co-acrylamide) with initiator and crosslinker into concrete cracks, then use infrared radiation to make the precursor copolymerize. The synthesized SAR can absorb water and swell, so that the cracks are filled and the leakage is prevented. The impermeability of concrete core with though-thickness cracks repaired by SAR was tested before and after being subjected to the attacks of acid, alkali, salts, dry-wet cycles and ultraviolet aging. Meantime, the absorbency of SAR was also evaluated by measuring the swelling ratio before and after the attacks of the same deteriorating factors. The experimental results show that the equilibrium-swelling ratio of SAR sharply decreases after the attacks of acid and salt, and the impermeability of concrete cracks repaired with SAR is mainly governed by the swelling ratio of SAR and the width of cracks.

备注：宋学锋

第一作者：何廷树,宋学锋

论文类型：期刊论文

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期号：期：

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是否译文：否

发表时间：2007-12-01