Recycling of high quantities of wastepaper sludge ash for production of blended cements and alternative materials

Among low cost and widely available raw materials, wastepaper sludge ash is of key interest as potential construction material. These materials come from the paper recycling industry. In present study, (WSA) retrieved UPM Chapelle Darblay Company located in south Rouen, France, were subjected to preliminary physicochemical characterization by X-ray fluorescence, laser granulometry scanning electron microscope (SEM) imagery for particles morphology. Afterwards, WSA considered mineral addition was blended with cement, lime, calcined kaolin highest possible dosages WSA. The effects reactivity evaluated means mechanical strength measurements. Cylindrical samples prepared mixtures air-cured 7, 14 28 days at ambient room temperature. content ranged 30%–95%. obtained unconfined compressive verify occurrence resistance. results indicated that increased along curing time all except reference sample which 100% used. lime does not impact strength. As main results, on one hand, cement based a weight ratio 95/5 develop 2 MPa more during suit materials. On other only 5% kaolin, value 9 attained after indicating can be effectively used building such bricks or blocks.