Effect of Al2O3 on the Structural Properties of Water-Quenched Copper Slag Related to Pozzolanic Activity

Water-quenched copper slag (WCS) modified with alumina (Al2O3) has been proven as a cement substitute; however, the effect of Al2O3 on structural properties WCS related to pozzolanic activity not well investigated. The and different amounts are characterized by X-ray diffraction, differential scanning calorimetry, Fourier-transform infrared spectroscopy, photoelectron uniaxial compressive strength test. results show that only amorphous exists in slag, stability first increases then decreases increase content. addition significantly improves at 7 28 days, but it little when slag’s curing age is 3 days. also non-bridging oxygen content, decrease degree polymerization, transition from Q2 Q4 Q3 Moreover, aluminum will convert Si-O-Si into Si-O-Al. These experimental can improve WCS, which be used partially replace cement.