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Properties of compressed concrete paving units made produced using desulfurization slag

In this study, natural aggregates were replaced with desulfurization slag aggregates to produce compressed concrete paving units (CCPU), and the engineering properties of the formed paving units were investigated to estimate the use of desulfurization slag in plain concrete products, such as CCPU. The results indicated that the optimal effect could be achieved by producing the CCPU by using the natural fine and coarse aggregates of desulfurization slag. The maximum compressive strength was 63 MPa, and the water absorption was approximately 5.08%; these results meet the basic Grade B CCPU specifications in CNS 13295. In addition, the bending failure load exceeded 12 kN, and satisfactory abrasion resistance was observed. However, the curing time must be extended to 14 days to obtain these effects. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1365–1371, 2015