Abstract
Experimental results of pore size distribution and compressive strength on hardened cement-based pastes containing fine ground particles from the recycling of construction and demolition waste (CDW) are reported. Supplementary cementitious material (SCM) coming from the crushing of laboratory concrete beams and clay bricks were used at a replacement level of 10% by weight of Portland cement. A reference paste without any addition was designed with water-cement ratio of 0.4 and the pastes containing SCM kept the water-cementitious material ratio of 0.4 as well. Compressive strength tests were performed on water-cured samples for various ages from 24 h to 90 days and mercury intrusion porosimetry was performed at 28 days. The general results suggest pozzolanic activity by the clay material while the concrete waste appears to behave similar to an inert quartz inclusion.
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