硫酸盐—干湿循环作用下混凝土力学性能研究

Sulfate-Mechanical Properties of Concrete Action under the Wet-Dry Cycle

本文试验制备了三种不同配合比的混凝土试样,通过硫酸盐干湿循环耦合作用加速硫酸盐侵蚀速率,测试各个试件不同循环次数后试件的抗压强度和质量的变化规律,进而分析硫酸盐干湿循环复合作用下的腐蚀机理。研究表明混凝土中加入掺合料不仅可以改善混凝土的抗硫酸盐侵蚀能力,而且掺和量在一定范围内时,混凝土结构抗硫酸盐侵蚀的能力会随着掺量的增大而提高;不同配合比的试件随着干湿循环次数的增加,质量增长的都比较平缓,变化比较小。

In this paper, concrete specimens were prepared with three different ratios. Accelerate the rate of sulfate attack by sulfate wet-dry cycle coupling, Variation specimen compressive strength and quality of each test specimen after different cycles. Further analysis of corrosion mechanism under the wet and dry cycles sulfate complex role. Studies have shown that the concrete admixture is added to improve the corrosion resistance to sulphate concrete, and in a certain dosage range, resistance to sulfate attack of concrete admixture with the content of the material increases and improved. Each change in Specimen Mix in quality during the wet and dry cycles are relatively flat, the smaller growth rate, no damage.