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An accelerated carbonation and its effect on concrete containing natural zeolite

An accelerated carbonation and its effect on concrete containing natural zeolite This study examines the influence of varying molar concentrations of carbonated water solutions on accelerated carbonation of normal concrete containing conventional fine aggregates (NAC) and concrete containing natural zeolite powder along with natural zeolite fine aggregates (ZAC). This attempt is made to address the CO2 emission problem from concrete production and enhance the sequestration of CO2 within the concrete matrix. In the presented research work, 0.5M and 0.75M sodium bicarbonate (NaHCO3) solutions were used as accelerating medium to enhance the process of carbonation in concrete specimens designed with 0.60 and 0.65 water-to-binder (w/b) ratios. The compressive strength test, carbonation depth measurement, pH measurement along with X-ray diffraction, thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR) analyses were performed, and the results for both ZAC and NAC were compared to assess the extent of carbonation. With increment in molar concentration of carbonated water, the ZAC specimens exhibited higher compressive strength, greater carbonation depth, reduced pH values, and enhanced calcium carbonate (CaCO3) precipitation. A higher w/b ratio enhanced the carbonation process due to deeper penetration of carbonated water during exposure. Based on the laboratory evaluations, the performance of ZAC was found to be superior than NAC with reference to the enhanced carbonation process and CO2 sequestration. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Innovative Infrastructure Solutions Springer Journals

An accelerated carbonation and its effect on concrete containing natural zeolite

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Publisher
Springer Journals
Copyright
Copyright © Springer Nature Switzerland AG 2022
ISSN
2364-4176
eISSN
2364-4184
DOI
10.1007/s41062-022-00796-x
Publisher site
See Article on Publisher Site

Abstract

This study examines the influence of varying molar concentrations of carbonated water solutions on accelerated carbonation of normal concrete containing conventional fine aggregates (NAC) and concrete containing natural zeolite powder along with natural zeolite fine aggregates (ZAC). This attempt is made to address the CO2 emission problem from concrete production and enhance the sequestration of CO2 within the concrete matrix. In the presented research work, 0.5M and 0.75M sodium bicarbonate (NaHCO3) solutions were used as accelerating medium to enhance the process of carbonation in concrete specimens designed with 0.60 and 0.65 water-to-binder (w/b) ratios. The compressive strength test, carbonation depth measurement, pH measurement along with X-ray diffraction, thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR) analyses were performed, and the results for both ZAC and NAC were compared to assess the extent of carbonation. With increment in molar concentration of carbonated water, the ZAC specimens exhibited higher compressive strength, greater carbonation depth, reduced pH values, and enhanced calcium carbonate (CaCO3) precipitation. A higher w/b ratio enhanced the carbonation process due to deeper penetration of carbonated water during exposure. Based on the laboratory evaluations, the performance of ZAC was found to be superior than NAC with reference to the enhanced carbonation process and CO2 sequestration.

Journal

Innovative Infrastructure SolutionsSpringer Journals

Published: Jun 1, 2022

Keywords: Cement; Cementitious materials; Carbonation; Chemical properties; Durability-related properties

References