PROTECTIVE COATINGS TO PREVENT DETERIORATION OF CONCRETE BY DEICING CHEMICALS
PROTECTIVE COATINGS TO PREVENT DETERIORATION OF CONCRETE BY DEICING CHEMICALS
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防止除冰化学品导致混凝土劣化的保护涂层
DOI：
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发表时间：
1965
期刊：
影响因子：
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通讯作者：
M. J. Snyder
中科院分区：
文献类型：
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作者：
M. J. Snyder
介绍了一项实验室研究的结果，以确定哪种潜在的防冰涂层是最有效和最经济的，以防止混凝土桥面板和结构的退化，防止由于除冰化学品的使用增加而引起的结垢。试验中共测试了110种涂料，包括亚麻籽油溶液和乳液、其他植物油溶液、环氧和改性环氧涂料、许多其他丙烯酸树脂涂料、橡胶涂料、焦油、沥青、蜡、油以及各种无机涂料和填料。通过实验室冻融实验，确定了涂层对持续暴露于3%氯化钠盐水溶液中的侵蚀力的抵抗程度。使用基于亚麻籽油或其他植物油的涂层和填充砂的煤焦油环氧涂层，可获得对非加气混凝土的良好保护。大多数有机涂层通过从混凝土表面剥落或剥离而迅速地脱落。大多数无机涂层和一些有机涂层对盐溶液是相当可渗透的，并且仅在短时间内提供保护。从经济性和性能两方面考虑，植物油，尤其是亚麻籽油溶液获得了最佳效果。注意确定亚麻籽油溶液的最佳组成、施用条件和施用量。结果表明，目前国内公路部门使用的蓖麻油与矿物油50-50混合液是最佳配方，其正常使用率是令人满意的。
RESULTS ARE PRESENTED OF A LABORATORY INVESTIGATION TO DETERMINE WHICH OF THE POTENTIAL PROTECTIVE COATINGS ARE MOST EFFECTIVE AND ECONOMICAL TO PREVENT THE DETERIORATION OF CONCRETE BRIDGE DECKS AND STRUCTURES RESULTING FROM SCALING CAUSED BY THE INCREASING USE OF DEICING CHEMICALS. A TOTAL OF 110 COATINGS WAS EVALUATED IN THE PROGRAM, INCLUDING LINSEED OIL SOLUTIONS AND EMULSIONS, SOLUTIONS OF OTHER VEGETABLE OILS, EPOXY AND MODIFIED EPOXY COATINGS, A NUMBER OF OTHER SYNTHETIC RESIN COATINGS, RUBBER COATINGS, TARS, ASPHALT, WAXES, OILS, AND VARIOUS INORGANIC COATINGS AND TREATMENTS. LABORATORY FREEZE-THAW EXPERIMENTS WERE PERFORMED TO EVALUATE THE DEGREE OF RESISTANCE OF THE COATINGS TO THE ATTACKING FORCES RESULTING FROM CONTINUED EXPOSURE TO A 3 PERCENT SOLUTION OF SODIUM CHLORIDE BRINE. GOOD PROTECTION OF NON-AIR-ENTRAINED CONCRETE WAS OBTAINED WITH COATINGS BASED ON LINSEED OIL OR OTHER VEGETABLE OILS AND A SAND-FILLED COAL TAR EPOXY COATING. THE MAJORITY OF THE ORGANIC COATINGS FAILED RAPIDLY BY FLAKING OR PEELING FROM THE SURFACE OF THE CONCRETE. MOST OF THE INORGANIC COATINGS AND SOME OF THE ORGANIC WERE APPRECIABLY PERMEABLE TO THE SALT SOLUTION AND AFFORDED PROTECTION ONLY FOR A SHORT TIME. CONSIDERING BOTH ECONOMY AND PERFORMANCE, THE BEST RESULTS WERE OBTAINED WITH VEGETABLE OILS AND, PARTICULARLY, LINSEED OIL SOLUTIONS. ATTENTION WAS GIVEN TO DETERMINING THE OPTIMUM COMPOSITION, APPLICATION CONDITIONS, AND APPLICATION RATES FOR LINSEED OIL SOLUTIONS. THE RESULTS SHOWED THAT THE 50-50 MIXTURE OF BOILED LINSEED OIL AND MINERAL SPIRITS NOW USED BY A NUMBER OF STATE HIGHWAY DEPARTMENTS WAS ABOUT THE OPTIMUM COMPOSITION AND THAT THE NORMALLY USED APPLICATION RATES WERE SATISFACTORY.