碱矿渣陶粒混凝土密实性及硫酸盐腐蚀试验

Experimental study for the compactibility and sulfate corrosion resistance of alkali-activated slag ceramsite concrete

通过孔结构、抗渗性和硫酸盐腐蚀试验,研究碱矿渣陶粒混凝土的密实性以及受硫酸盐腐蚀混凝土的退化性能.研究结果表明,对于同种骨料,碱矿渣混凝土的密实性优于普通混凝土;对于同种水泥,陶粒混凝土的电通量较高,其密实性比砾石混凝土的差.混凝土在硫酸盐溶液中浸泡会使混凝土强度先提高再降低,但碱矿渣混凝土强度下降幅度比普通混凝土的小,且碱矿渣陶粒混凝土的下降幅度比碱矿渣砾石混凝土的小.碱矿渣陶粒混凝土具有较好的耐硫酸盐腐蚀能力.

By the pore structure test, the anti - permeability test and sulfate corrosion test of alkali -activated slag ceramsite concrete, the compactibility and degradation under sulfate corrosion of con- crete were studied. The results show that, the compactibility of alkali - activated slag concrete is better than that of ordinary concrete for the same kind of aggregate. Compared with the same cement, the ceramsite concrete has higher electric flux, and its compactibility is worse than gravel concrete. The strength of ordinary concrete under sulfate solution decreases after the strength increasing at beginning. However, the situation of decending strength of alkali - activated slag concrete is better than that of ordinary concrete, and the situation of decending strength of alkali - activated slag ceramsite concrete is better than that alkali -activated slag gravel concrete. Therefore, the alkali -activated slag ceram- site concrete has superior resistance to sulphate corrosion.