| 摘要: |
| 采用含有引发剂、交联剂的丙烯酸和丙烯酰胺单体溶液浸渍混凝土表层，通过红外辐射引发原位合成吸水性树脂（SAR）对该表层进行处理，并与斥水型有机硅防水剂（AAS）表层处理的混凝土试件进行了对比；通过不同碳化时间下的平均碳化深度和碳化层内Ca（OH）2，CaCO3的XRD特征峰变化规律表征了混凝土SAR表层处理前后的抗碳化能力；通过SEM分析了SAR改善混凝土抗碳化能力的机理. |
| 关键词: 混凝土 碳化 吸水性树脂（SAR） 原位合成高吸水性树脂 |
| DOI：10.3969/j.issn.10079629.2012.01.011 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（50908189）；教育厅自然基金资助项目（09JK537）；国家“大学生创新性实验”项目（91070318）；人才基金资助项目（RC0911） |
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| Resistance to Carbonation of Concrete Treated by Superabsorbent Resin Synthesized in Situ |
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| Abstract: |
| Carbonation is the key factor that causes the corrosion of the reinforcing steel embedded in concrete. The surface layers of the concrete specimens were treated by super absorbent resin（SAR）synthesized in situ， i.e.， the concrete surface was impregnated by the precursor solution of poly（acrylic acid co acrylamide）with initiator and crosslinker， and then the impregnated concrete was radiated by infrared ray to synthesize SAR in situ. The resistance to carbonation was studied for the concrete treated with SAR in comparison with the hydrophobic waterproofing agent of alkyl alkoxyl silane（AAS）. The carbonation depth of concrete after the accelerated carbonation testing was measured and the ingress of carbon dioxide was evaluated quantitatively by the sophisticated technique of X ray diffraction（XRD）. The results show that the concrete specimens treated with SAR have higher resistance to carbonation than that of the concrete specimens treated with AAS and the control concrete specimens. |
| Key words: concrete carbonation super absorbent resin(SAR) super absorbent resin synthesized in situ |
