海水环境下矿渣再生混凝土的劣化规律研究

Research on the Deterioration Law of Slag Recycled Concrete in Seawater Environment

以人造海水为侵蚀介质,采用干湿循环方法对矿渣掺量分别为0、10%、20%、30%及40%的C30级再生混凝土试件进行海水侵蚀试验,研究了再生混凝土试件的质量损失、抗压强度以及相对动弹性模量的侵蚀劣化规律。试验结果表明:随着干湿循环次数的增多,再生混凝土的表观质量和力学性能呈现下降趋势;同强度等级的再生混凝土在矿渣粉掺量为40%时表现为较强的抗海水侵蚀性能。

Using artificial seawater as the erosion medium,the dry and wet circulation method was used to conduct seawater corrosion tests on C30 recycled concrete specimens with slag contents of 0,10%,20%,30%and 40%respectively.The corrosion deterioration law of mass loss,compressive strength and relative dynamic elastic modulus of recycled concrete test blocks was studied.The test results show that as the number of dry and wet cycles increases,the apparent quality and mechanical properties of the recycled concrete show a downward trend;the recycled concrete of the same strength level shows strong resistance to seawater erosion when the slag powder content is 40%.