Improving sustainability of mortar by wood-ash and Nano-SiO2

Cement production charges the environment with CO2 pollution and exhausts natural stocks of limestone and clay. Cement was partially replaced with Wood Ash (WA), and nano-SiO2 (NS) was added to balance the strength loss. Mortar specimens were prepared by replacing the cement with WA up to 20 %, 30 %...

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Bibliographic Details
Published in:	Case studies in chemical and environmental engineering Vol. 9; p. 100597
Main Authors:	Zinad, Omar Saber, Csiha, Csilla
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-06-2024 Elsevier
Subjects:	Cement Cement mortar Nano-silica Sustainability Wood-ash Cement mortar Wood-ash Sustainability Nano-silica Cement
Online Access:	Get full text
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Summary:	Cement production charges the environment with CO2 pollution and exhausts natural stocks of limestone and clay. Cement was partially replaced with Wood Ash (WA), and nano-SiO2 (NS) was added to balance the strength loss. Mortar specimens were prepared by replacing the cement with WA up to 20 %, 30 %, 40 %, and 50 %, using constant-flow mortar. The flexural and compressive strength results indicated that although adding 40 % of WA reduced the mortar's strength, it still remained in an acceptable zone (higher than 20 MPa). The addition of 2.5 % NS recovered the strength loss caused by replacing cement with 40 % WA. [Display omitted] •Concrete is made sustainable by replacing 40 % cement with wood ash.•Adding nano-SiO2 balances the strength loss of cement mortar.•The amount of raw material need (like limestone, etc.), the CO2 pollution, and the landfills caused by cement production can all be reduced by partly supplementing cement with wood ash.
ISSN:	2666-0164 2666-0164
DOI:	10.1016/j.cscee.2023.100597