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A platform for research: civil engineering, architecture and urbanism
Alternative cements based on alkali-activated red clay brick waste
Graphical abstract Display Omitted
Highlights The alkaline activation of red clay brick waste (RCBW) was investigated. The effect of the addition (⩽20%) of Portland Cement (OPC) was studied. The addition of Na2SiO3 and OPC contributed in the better mechanical behaviour. Compressive strength of up to 102MPa was obtained at room temperature (25°C). The feasibility of obtain hybrid binders using RCBW is demonstrated.
Abstract The synthesis of alkali-activated and hybrid cements based on red clay brick waste was investigated using sodium hydroxide and sodium silicate solution as alkaline activators. The effect on the compressive strength of Na2O/SiO2 and SiO2/Al2O3 molar ratios and type of curing was evaluated. The combined presence of Portland cement (20%) and sodium silicate yielded a maximum compressive strength of 102.6MPa at 28 days and 25°C; this value is two times higher than the strength obtained in mixtures without Portland cement and 7.3 times higher than when sodium hydroxide is used. The results demonstrated the feasibility of using these materials to produce structural and non-structural construction elements.
Alternative cements based on alkali-activated red clay brick waste
Graphical abstract Display Omitted
Highlights The alkaline activation of red clay brick waste (RCBW) was investigated. The effect of the addition (⩽20%) of Portland Cement (OPC) was studied. The addition of Na2SiO3 and OPC contributed in the better mechanical behaviour. Compressive strength of up to 102MPa was obtained at room temperature (25°C). The feasibility of obtain hybrid binders using RCBW is demonstrated.
Abstract The synthesis of alkali-activated and hybrid cements based on red clay brick waste was investigated using sodium hydroxide and sodium silicate solution as alkaline activators. The effect on the compressive strength of Na2O/SiO2 and SiO2/Al2O3 molar ratios and type of curing was evaluated. The combined presence of Portland cement (20%) and sodium silicate yielded a maximum compressive strength of 102.6MPa at 28 days and 25°C; this value is two times higher than the strength obtained in mixtures without Portland cement and 7.3 times higher than when sodium hydroxide is used. The results demonstrated the feasibility of using these materials to produce structural and non-structural construction elements.
Alternative cements based on alkali-activated red clay brick waste
Robayo, Rafael A. (author) / Mulford, Alexandra (author) / Munera, Jorge (author) / Mejía de Gutiérrez, Ruby (author)
Construction and Building Materials ; 128 ; 163-169
2016-10-06
7 pages
Article (Journal)
Electronic Resource
English
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