Development of a Commercial Screed Mortar with Low OPC Content by Incorporation of Biomass Fly Ash
authors Capela, MN; Tobaldi, DM; Tarelho, LAC; Seabra, MP; Labrincha, JA
nationality International
author keywords biomass fly ash; green buildings; mortar; supplementary cementitious materials; sustainability; waste recycling
abstract Featured Application

Substitution of 17 wt.% of Ordinary Portland Cement by biomass fly ash in the formulation of a commercial screed mortar.

Substitute Ordinary Portland Cement (OPC) by biomass fly ash (BFA) reduce the environmental impact produced by cement-based materials, and at the same time, decreased the economic and environmental burden associated with the landfilling of this waste. This study aims to evaluate the recycling of BFA as supplementary cementitious materials (SCMs) in a commercial screed mortar formulation. Two BFA varieties, both resulting from fluidized bed combustion of forest residues, were used to replace 17, 50, and 67 wt.% of OPC. The influence of simple pre-treatment processes of the BFA, such as sieving and grinding, in the fresh and hardened state properties of the mortars, was evaluated. The BFAs were characterized in terms of chemical (XRF) and mineralogical (XRD) composition, particle size distribution (laser diffraction-COULTER) and morphology (SEM). The prepared formulations were characterized in terms of workability, mass loss upon curing, bulk density, sorptivity (by immersion and capillary), flexural and compressive strength and durability to 25 freeze-thaw cycles. Both of the BFAs are potential SCMs. Substitution of 17 wt.% OPC with BFA complied with the product technical requirements for compressive and flexural strength (10 and 3 MPa, respectively), with the ground and sieved and just sieved BFAs perform slightly better than the as-received BFA.

publisher MDPI
isbn 2076-3417
year published 2021
volume 11
issue 20
digital object identifier (doi) 10.3390/app11209630
web of science category 19
subject category Chemistry, Multidisciplinary; Engineering, Multidisciplinary; Materials Science, Multidisciplinary; Physics, Applied
unique article identifier WOS:000716404600001
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journal analysis (jcr 2019):
journal impact factor 2.474
5 year journal impact factor 2.458
category normalized journal impact factor percentile 56.225
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