Recycling of high quantities of wastepaper sludge ash for production of blended cements and alternative materials - Archive ouverte HAL
Article Dans Une Revue Environmental Technology and Innovation Année : 2021

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

H. Zmamou
N. Leblanc
J. Kubiak
  • Fonction : Auteur

Résumé

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, wastepaper sludge ash (WSA) retrieved from UPM Chapelle Darblay Company located in the south of Rouen, France, were subjected to preliminary physicochemical characterization by X-ray fluorescence, laser granulometry and scanning electron microscope (SEM) imagery for particles morphology. Afterwards, the WSA considered as mineral addition was blended with cement, lime, and calcined kaolin for the highest possible dosages in WSA. The effects of reactivity were evaluated by means of mechanical strength measurements. Cylindrical samples were prepared with WSA mixtures and air-cured for 7, 14 and 28 days at ambient room temperature. WSA content ranged from 30%–95%. The samples obtained were subjected to unconfined compressive strength to verify the occurrence of reactivity and resistance. The results indicated that the strength increased along the curing time for all mixtures except for the reference sample in which 100% of WSA was used. The lime addition does not impact the unconfined compressive strength. As main results, on one hand, WSA and cement based mixtures with a weight ratio of 95/5 develop 2 MPa compressive strength and more during the curing time which suit for construction materials. On the other hand, with only 5% of calcined kaolin, a value of 9 MPa was attained after 28 days indicating that mixtures with calcined kaolin can be effectively used for building materials such as bricks or blocks.
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hal-03382912 , version 1 (09-05-2023)

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H. Zmamou, N. Leblanc, Daniel Levacher, J. Kubiak. Recycling of high quantities of wastepaper sludge ash for production of blended cements and alternative materials. Environmental Technology and Innovation, 2021, 23, pp.101524. ⟨10.1016/j.eti.2021.101524⟩. ⟨hal-03382912⟩
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