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        Experimental Study on Durability and Mechanical Properties of High Ductile Concrete under Long-Term Sulfate Attack

        Jialiang Kou,Lingling Li,Junping Shi 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.4

        Uniaxial compression on high ductile concrete after erosion by different concentrations of sulfate solutions was conducted. The compressive strength, mass change fraction, corrosion resistance coefficient and other parameters on the basic mechanical properties of high ductile concrete is studied. The erosion form and uniaxial compression failure characteristics of the samples was analyzed. And using scanning electron microscope to observe the microscopic morphology of the samples, it is found that sulfate and age accelerate the damage to high ductile concrete, with its damage mechanism revealed. The test results are as follows: with the increase of age, the compressive strength and quality of high ductile concrete in 5%, 10% and saturated sulfate solution will increase first and then decrease; the mass change fraction of high ductile concrete is greater than that of ordinary concrete, it has the characteristics of self-compacting before the erosion age of 270 days, Then, as the sulfate solution concentration increases, the damage of the high ductile concrete becomes more serious. The comparison test with ordinary concrete shows that high ductile concrete has higher resistance to sulfate attack. This research can provide experimental basis for the application of high ductile concrete in engineering under sulfate corrosion environment.

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