LI Ying, NI Wen, CHEN De-ping, WANG Zhong-jie, ZHANG Bin. Experimental investigation on concrete made from iron and steel slags for building high-strength artificial reefs[J]. Chinese Journal of Engineering, 2012, 34(11): 1308-1313. DOI: 10.13374/j.issn1001-053x.2012.11.002
Citation: LI Ying, NI Wen, CHEN De-ping, WANG Zhong-jie, ZHANG Bin. Experimental investigation on concrete made from iron and steel slags for building high-strength artificial reefs[J]. Chinese Journal of Engineering, 2012, 34(11): 1308-1313. DOI: 10.13374/j.issn1001-053x.2012.11.002

Experimental investigation on concrete made from iron and steel slags for building high-strength artificial reefs

  • The strength of a cementitious material made from steel slag, iron slag, cement clinker and flue gas desulfurization (FGD) gypsum was optimize by orthogonal tests to prepare a concrete for building high-strength artificial reefs. When the ratio of steel slag to iron slag is 5:3 and when 10% cement clinker and 10% FGD gypsum are mixed with 80% iron and steel slag powder, the mixed cementitious material has an optimized strength. A concrete with a compressive strength over 50 MPa can be prepared by using such a mixture as a cementitious material and steel slag grains as its aggregates which have been stabilized by a hot-simmering method. Hydration processes of the net slurry were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that early hydration products in the system are mainly AFt and C-S-H gel, and in the later stage the pozzolanic reaction of iron and steel slags contributes mainly to the increase in strength.
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