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Influence of Biomass Ash on the Performance and Durability of Mortar

Ramdane Rihab, Kherraf Leila, Abdelouahed Assia, Belachia Mouloud

Civil and Environmental Engineering Reports

2022

Vol. 32, no. 2

53--71

This work revolves around the study of the partial substitution of cement by biomass ash (residue generated during incineration of wood waste) in mortar. The introduction of wood ash in the cement formulation allows solving some problems related to the lack of construction materials and protecting the environment. To carry out this work we have introduced wood ash as an addition which partially substitutes cement at three different replacement percentages (5%, 10% and 15%). We carried out tests on mortar in the fresh state (consistency, density and occluded air); evaluated its performance in the hardened state (compressive and flexural tensile strength), dimensional stability and its durability (water absorption by immersion and by capillarity as well as resistance to chlorides and acidic environments followed by XRD). Results obtained will be compared with the results of control samples with 0% substitution rate. The results of this valorisation show that the incorporation of 5% of ash fillers in the cement improves mechanical resistance as well as certain durability parameters.

Odporność zapraw z udziałem popiołów lotnych z kotłów fluidalnych i konwencjonalnych na korozję kwasową

Janowska-Renkas E., Kowalska J., Kaliciak A., Janus G.

Roczniki Inżynierii Budowlanej

2016

z. 16

101--109

This paper presents the results of research undertaken to determine the impact of the aggressive environment of acid corrosion on the durability of cement mortars with the participation of fluidized beds boiler fly ashes and conventional fly ashes used separately and in the form of mixtures. The beneficial effect of fluidized beds boiler fly ashes on the physical properties of cement mortars has been shown, i.e. reduction of the contraction, decrease of weight loss and reduction of the destruction of mortars in acid corrosion. This effect was especially beneficial for mortars containing higher (45% by weight) content of fluidized fly ashes, used separately and in the form of mixtures, regardless of the aggressiveness of the environment (1%, 3% and 5% HCl solution).