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