Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Properties of binary and ternary reactive MgO mortar blends subjected to CO2 curing
Abstract Research and development of low CO2 binders for building material applications is warranted in efforts to reduce the negative environmental impacts associated with the cement and concrete industry. The purpose of this study is to investigate the effect of carbonation curing on the mineralogy, morphology, microstructure and evolution of compressive strength of mortars comprised of general use (GU) cement, ground granulated blast furnace slag (GGBFS), and reactive MgO used as cement replacement. This study investigates binary (GU–MgO) and ternary (GU–GGBFS–MgO) blends exposed to atmosphere curing (0.0038%CO2) and carbonation curing (99.9%CO2). Carbonation-cured mortars exhibited greater compressive strengths than atmosphere mortars at all ages (7d, 28d, and 56d). Increasing percentages of reactive MgO decreased the compressive strength markedly less for carbonation-cured mortars than atmosphere-cured mortars particularly due to magnesium calcite formations. Magnesium calcite influenced the morphology of carbonates and promoted the carbonate agglomeration resulting in a dense and interconnected microstructure.
Properties of binary and ternary reactive MgO mortar blends subjected to CO2 curing
Abstract Research and development of low CO2 binders for building material applications is warranted in efforts to reduce the negative environmental impacts associated with the cement and concrete industry. The purpose of this study is to investigate the effect of carbonation curing on the mineralogy, morphology, microstructure and evolution of compressive strength of mortars comprised of general use (GU) cement, ground granulated blast furnace slag (GGBFS), and reactive MgO used as cement replacement. This study investigates binary (GU–MgO) and ternary (GU–GGBFS–MgO) blends exposed to atmosphere curing (0.0038%CO2) and carbonation curing (99.9%CO2). Carbonation-cured mortars exhibited greater compressive strengths than atmosphere mortars at all ages (7d, 28d, and 56d). Increasing percentages of reactive MgO decreased the compressive strength markedly less for carbonation-cured mortars than atmosphere-cured mortars particularly due to magnesium calcite formations. Magnesium calcite influenced the morphology of carbonates and promoted the carbonate agglomeration resulting in a dense and interconnected microstructure.
Properties of binary and ternary reactive MgO mortar blends subjected to CO2 curing
Panesar, Daman K. (Autor:in) / Mo, Liwu (Autor:in)
Cement and Concrete Composites ; 38 ; 40-49
20.03.2013
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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