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Effect of Thermal Desorption Unit Residue (TDUR) On Compressive Strength of Concrete and Mortar

Justin N. Egbebike, Bright Ihechukwu Anyanwu

Abstract


This study evaluates the effect of Thermal Desorption Unit Residue (TDUR) on the compressive strength (fck) of concrete and mortar. A Concrete Mix Design of 1:2:4:0.5; and 1:6:0.5 were adopted to prepare concrete and mortar mixes. Modified samples were prepared using 10%, 20%, 30%, 40%, 50%, and 60% TDUR to partially replace sand. The results show that fck of concrete modified with 10% TDUR was 12.74 N/mm2, 13.48 N/mm2 and 15.41 N/mm2 after 7, 14 and 28 days curing respectively.  However, addition of up to 60% TDUR decreased strength considerably to 4.52 N/mm2, 4.17 N/mm2 and 6.15 N/mm2 after 7, 14 and 28 days curing respectively. For the mortar mixes, compressive strength of mixes with 10% TDUR was 7.2 N/mm2, 9.33 N/mm2 and 5.19 N/mm2 after 7, 14 and 28 days curing respectively.  However also, addition of up to 60% TDUR decreased mortar strength considerably to 0.96 N/mm2, 1.26 N/mm2 and 1.6 N/mm2 after 7, 14 and 28 days curing respectively. The replacement of sand with TDUR gave an overall reduction in fck; however, 10% TDUR in concrete and mortar after 28 days curing met minimum requirements for use in concrete and masonry works.


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References


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