[1]谢智刚,王起才,代金鹏,等.混凝土抗硫酸盐侵蚀性能试验研究[J].中国材料进展,2018,(11):036-40.[doi:10.7502/j.issn.1674-3962.2018.11.08]
　XIE Zhigang,WANG Qicai,DAI Jinpeng,et al.Research on Sulfate Resistance of Concrete[J].MATERIALS CHINA,2018,(11):036-40.[doi:10.7502/j.issn.1674-3962.2018.11.08]
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混凝土抗硫酸盐侵蚀性能试验研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2018年第11期
页码:
036-40
栏目:
研究报告
出版日期:
2018-11-30

文章信息/Info

Title:
Research on Sulfate Resistance of Concrete
作者:
谢智刚12; 王起才12; 代金鹏12; 王振宇12; 梁柯鑫12; 田祥富1
（1. 兰州交通大学 道桥工程灾害防治技术国家地方联合工程实验室，甘肃 兰州 730070）（2. 兰州交通大学 甘肃省道路桥梁与地下工程重点实验室，甘肃 兰州 730070）
Author(s):
XIE Zhigang12; WANG Qicai12; DAI Jinpeng12; WANG Zhenyu12; LIANG Kexin12; TIAN Xiangfu1
(1. Bridge Engineering National Local Joint Engineering Laboratory of Disaster Prevention and Control Technology,Lanzhou Jiaotong University, Lanzhou 730070, China)（2. Key Laboratory of Road and Bridge and Underground Engineering of Gansu Province,Lanzhou Jiaotong University, Lanzhou 730070, China)
关键词:
混凝土劣化; 硫酸盐侵蚀; 抗蚀系数; 相对动弹性模量; 连通孔隙率
Keywords:
concrete deterioration;  sulfate attack;  resistance coefficient;  relative elastic modulus;  connected porosity
DOI:
10.7502/j.issn.1674-3962.2018.11.08
文献标志码:
A
摘要:
研究了不同水胶比混凝土试件在（20±2）℃全浸泡作用下的抗硫酸盐侵蚀性能。试验制备0.32与0.36两种水胶比的普通硅酸盐水泥、高抗硫水泥以及复掺矿粉和硅灰的混凝土试件，检测了试件标养28 d后的抗压强度、动弹性模量及各试件在（20±2）℃、质量分数为3%Na2SO4溶液中全浸泡侵蚀的强度、动弹性模量变化情况，对混凝土在（20±2）℃全浸泡侵蚀下的抗硫酸盐侵蚀性能进行了评价。结果表明，在（20±2）℃全浸泡作用下，0.36水胶比混凝土抗硫酸盐侵蚀性能低于0.32水胶比混凝土，抗硫酸盐侵蚀性能随着水胶比的降低而提高；混凝土复掺矿粉和硅灰后抗硫酸盐侵蚀性能较好；高抗硫水泥通过限制C3A的含量，进而改善混凝土抗硫酸盐侵蚀性能，不一定在任何环境下都适用；混凝土连通孔隙率从侧面证实了低水胶比混凝土和复掺矿粉和硅灰混凝土抗压侵蚀系数和相对动弹性模量较高，说明低水胶比混凝土复掺矿粉和硅灰后，可以显著提高混凝土抗硫酸盐侵蚀性能。
Abstract:
The effects of different water-cement ratio cement mortar on the sulfate resistance under full immersion were studied. Ordinary Portland cement, high sulfur-resistant cement and slag with silica fume cement concrete samples were prepared with water-cement ratio of 0.32 and 0.36. After standard curing for 28 days, compressive strength and relative elastic modulus were examined. Concrete samples were fully immersed in 3wt% Na2SO4 sulfate solution at （20±2）℃, and their strength and elastic modulus were measured. Then the corrosion resistance of the concrete under full immersion was evaluated. The results show that under the condition of full immersion, the corrosion resistance of 0.36 water-cement ratio is lower than that of 0.32 water-cement sample, and the resistance to sulfate attack increases with the decrease of water-cement ratio. Concrete was mixed with mineral powder-silica fume after full immersion conditions to enhance the performance of sulfate erosion significantly. High sulfur-resistant cement can improve the performance of concrete sulfate attack by limiting the content of C3A, which is not necessarily applicable in any environment. The resistance coefficient and relative elastic modulus of low-water-cement concrete and concrete mixed with mineral powder-silica are higher, which is confirmed by connected porosity, further showing low-water-cement concrete mixed with mineral powder-silica can significantly improve the performance of concrete resistance to sulfate attack.
更新日期/Last Update: 2018-12-10