Influence of the Freeze-Thaw Cycle and Chlorine Salt Erosion Coupling Conditions on Frost-resistance of Polymer-modified Rapid Hardening Concrete
NAN Xueli1, 2, WANG Chaojie1, 2, LIU Jinxin1, 2, HAN Bo1, 2, YANG Lanlan1, 2
1 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology,Lanzhou 730050; 2 School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050
Abstract: The use of deicing salt in the winter of northern China can seriously affect the durability of concrete for bridge deck overlays. In order to solve this problem, the law of freezing-thawing damage development under different situation has been studied. Rapid hardening sulphoaluminate cement(SAC), polymer-modified fast-hardening cement(JS) and ordinary Portland cement(P.O) were placed in NaCl solution with mass concentration of 0% and 3.5% to conduct fast freeze-thaw cycles experiment. Besides, with the help of SEM, the internal damage mechanism of different kinds of concrete under water and salt freezing environment were analyzed. Results showed that compared with the concrete in salt freezing situation, the sample in water freezing si-tuation did not show apparent mass loss, which meant that the freezing-thawing damage rate was slow and the damage was in a low degree. The antifreeze characteristic sequence of concrete both in two situations is P.O>JS>SAC. In salt freezing situation, more Fridel salt was yielded as corrosion products, which aggravated the collapsing of concrete.
南雪丽, 王超杰, 刘金欣, 韩博, 杨蓝蓝. 冻融循环和氯盐侵蚀耦合条件对聚合物快硬水泥混凝土抗冻性的影响*[J]. 《材料导报》期刊社, 2017, 31(23): 177-181.
NAN Xueli, WANG Chaojie, LIU Jinxin, HAN Bo, YANG Lanlan. Influence of the Freeze-Thaw Cycle and Chlorine Salt Erosion Coupling Conditions on Frost-resistance of Polymer-modified Rapid Hardening Concrete. Materials Reports, 2017, 31(23): 177-181.
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2017, Vol. 31 
