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IMPROVEMENT OF CONCRETE RESISTANCE TO SULFATE ATTACK BY RMO-CEMENT PASTE COATING
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摘要: 采用RMO-水泥净浆涂层，通过不同的涂抹工艺，对比评价其对混凝土抗硫酸盐侵蚀性能的改善效果，总结出RMO-水泥净浆涂层在不同的涂抹工艺下，混凝土受硫酸盐侵蚀的机理及劣化的过程。结果表明，对混凝土迎水面及背水面采用RMO-水泥净浆涂层进行涂封处理，均能有效减弱硫酸盐溶液在混凝土中的渗透作用，迎水面涂封处理对预防硫酸盐侵蚀更有效。Abstract: The concrete resistance to sulfate attack was improved by applying repair mortar overlay(RMO)-cement paste coating in different ways.The degradation mechanisms and processes of sulfate attack in concrete with different ways of applying coatings were discussed.Results showed that the penetration of sulfate ions into concrete was effectively reduced by applying the coatings on both the positive and the negative side.It's more efficient on preventing sulfate attack by applying the coatings on the positive side.
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Key words:
- RMO /
- coating /
- concrete /
- sulfate attack
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Santhanam S, Cohen M D, Olek J. Sulfate Attack ResearchWhither Now?[J]. Cement and Concrete Research,2001,31:845-851. [2] Hime W G, Mather B.Sulfate Attack, Or Is It?[J]. Cement?and Concrete Research,1999,29:789-791. [3] 张风臣,马保国,谭洪波,等.不同环境下水泥基材料硫酸盐侵蚀类型和机理[J].济南大学学报:自然科学版,2008,22(1):33-37. [4] 梁咏宁,袁迎曙.硫酸钠和硫酸镁溶液中混凝土腐蚀破坏的机理[J].硅酸盐学报,2007,35(4):504-508. [5] 杨全兵,朱蓓蓉.混凝土盐结晶破坏的研究[J].建筑材料学报,2007,10(4):392-396. [6] Neville A. The Confused World of Sulfate Attack on Concrete[J]. Cement and Concrete Research,2004,34:1275-1296. [7] Mehta P K, Sulfate Attack on Concrete: Separating Myths from?Reality[J]. Concrete International,2000,22(8):57-61. -
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