Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Microstructural evolution of belite-rich cement mortar subjected to water, carbonation, and hybrid curing regime
https://orcid.org/0000-0001-9824-1168
https://orcid.org/0000-0002-2300-9994
https://orcid.org/0000-0002-2224-2962
Abstract The present study investigates the influence of various curing schemes on the strength and microstructural evolution of belite-rich cement (BRC) mortar. The sets of BRC mortar were subjected to different carbonation and/or water curing for 28 days. The mineralogical changes in BRC depend upon the w/c ratio of the mix and CO2 concentration at the initial days of curing. Ettringite, portlandite, and unreacted belite were the hydrated phases at a 0.3 w/c ratio. Regardless of curing type, rapid mineralogical changes at higher w/c ratios through different polymorphs of CaCO3 and de-calcified silica gel were observed. The carbonation curing was efficient for higher strength development at all the w/c ratios (0.3–0.7). However, hybrid curing was more efficient than water curing at higher w/c ratios (0.6 and 0.7) in improving the compressive strength.
Highlights The phase assemblage and strength property of BRC significantly depended upon the w/c ratio and type of curing regime. The phase assemblage of carbonation-cured BRC was constituted by calcite, decalcified C–S–H, and unreacted belite in minor proportion. The calcite formation in hybrid-cured BRC was lower than in the carbonation-cured BRC samples. The strength development of BRC was the highest under carbonation curing compared to water and hybrid curing. Hybrid curing was more efficient in strength development than water curing at a higher w/c ratio.
Microstructural evolution of belite-rich cement mortar subjected to water, carbonation, and hybrid curing regime
https://orcid.org/0000-0001-9824-1168
https://orcid.org/0000-0002-2300-9994
https://orcid.org/0000-0002-2224-2962
Abstract The present study investigates the influence of various curing schemes on the strength and microstructural evolution of belite-rich cement (BRC) mortar. The sets of BRC mortar were subjected to different carbonation and/or water curing for 28 days. The mineralogical changes in BRC depend upon the w/c ratio of the mix and CO2 concentration at the initial days of curing. Ettringite, portlandite, and unreacted belite were the hydrated phases at a 0.3 w/c ratio. Regardless of curing type, rapid mineralogical changes at higher w/c ratios through different polymorphs of CaCO3 and de-calcified silica gel were observed. The carbonation curing was efficient for higher strength development at all the w/c ratios (0.3–0.7). However, hybrid curing was more efficient than water curing at higher w/c ratios (0.6 and 0.7) in improving the compressive strength.
Highlights The phase assemblage and strength property of BRC significantly depended upon the w/c ratio and type of curing regime. The phase assemblage of carbonation-cured BRC was constituted by calcite, decalcified C–S–H, and unreacted belite in minor proportion. The calcite formation in hybrid-cured BRC was lower than in the carbonation-cured BRC samples. The strength development of BRC was the highest under carbonation curing compared to water and hybrid curing. Hybrid curing was more efficient in strength development than water curing at a higher w/c ratio.
Microstructural evolution of belite-rich cement mortar subjected to water, carbonation, and hybrid curing regime
https://orcid.org/0000-0001-9824-1168
https://orcid.org/0000-0002-2300-9994
https://orcid.org/0000-0002-2224-2962
Abstract The present study investigates the influence of various curing schemes on the strength and microstructural evolution of belite-rich cement (BRC) mortar. The sets of BRC mortar were subjected to different carbonation and/or water curing for 28 days. The mineralogical changes in BRC depend upon the w/c ratio of the mix and CO2 concentration at the initial days of curing. Ettringite, portlandite, and unreacted belite were the hydrated phases at a 0.3 w/c ratio. Regardless of curing type, rapid mineralogical changes at higher w/c ratios through different polymorphs of CaCO3 and de-calcified silica gel were observed. The carbonation curing was efficient for higher strength development at all the w/c ratios (0.3–0.7). However, hybrid curing was more efficient than water curing at higher w/c ratios (0.6 and 0.7) in improving the compressive strength.
Highlights The phase assemblage and strength property of BRC significantly depended upon the w/c ratio and type of curing regime. The phase assemblage of carbonation-cured BRC was constituted by calcite, decalcified C–S–H, and unreacted belite in minor proportion. The calcite formation in hybrid-cured BRC was lower than in the carbonation-cured BRC samples. The strength development of BRC was the highest under carbonation curing compared to water and hybrid curing. Hybrid curing was more efficient in strength development than water curing at a higher w/c ratio.
Microstructural evolution of belite-rich cement mortar subjected to water, carbonation, and hybrid curing regime
Sharma, Raju (Autor:in) / Pei, Junjie (Autor:in) / Jang, Jeong Gook (Autor:in)
07.03.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2016
Polymer-modified cement using belite-rich cement and carbonation reaction
| British Library Online Contents | 2016