所属单位：材料科学与工程学院

发表刊物：magzine of concrete research

关键字：中文关键字：混凝土； 硫酸盐腐蚀； 吸水性树脂，英文关键字：concrete; sulfate resistance; poly (acrylic acid-c

摘要：Sulfate attack is a key factor that results in the deterioration of concrete. In this work, a novel method to improve the sulfate resistance of concrete by surface treatment with Super-absorbent Resin (SAR) synthesized in situ was presented, i.e., the precursor solution of poly (acrylic acid-co-acrylamide) is soaked into the capillary-pores of hardened concrete, initiated by infrared radiation and synthesized SAR, then the swollen SAR absorbs water and fills capillary-pores to cut off the penetration pipes of external sulfates. The performances of SAR synthesized in situ were characterized by swelling ratio for deionized water and 5% sodium sulfate solution. The osmosis of SO42- in cement mortar was compared before and after treated by SAR. The sulfate corrosion characteristics of cement mortar were confirmed by scanning electron microscopy (SEM) and X-ray diffraction. The laboratory testing results indicate that the SAR has high swelling ratio, and the swollen SAR adhered to the capillary-pores of cement mortar can evidently reduce the osmosis of SO42- in cement mortar. After being subjected to sodium sulfate attack, the cement mortar specimens treated by SAR have not been severely deteriorated.

备注：宋学锋

第一作者：何廷树,宋学锋

论文类型：期刊论文

卷号：卷：60

期号：期：1

页面范围：页：49-55

是否译文：否

发表时间：2008-12-01