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A platform for research: civil engineering, architecture and urbanism
Influence of fired clay brick waste additions on the durability of mortars
Abstract The use of metakaolin is known to help improve properties of Portland cement-based mortars. The presumed similarities between the characteristics of metakaolin and those of a powdered (<45μm) fired clay brick clean waste (CBW) led to the investigation of the effect on the durability of mortars of partial replacement (10, 25 and 40wt.%) of Portland cement by CBW. Properties such as 28 and 90days-compressive strength, water absorption, apparent porosity, absorption by capillarity, chloride retention, carbonation depth and sulphate resistance were evaluated. The CBW-containing cured mortars showed improved strength and density, as the result of combined physical and pozzolanic pore filling effect of added CBW. However, CBW-free mortar exhibited larger spreading and, being more porous, higher sulphate resistance and ability to absorb chlorides. Optimum performance was found for the 40wt.% CBW mortar whose compressive strength can be up to 130% higher than that of the CBW-free mortar.
Influence of fired clay brick waste additions on the durability of mortars
Abstract The use of metakaolin is known to help improve properties of Portland cement-based mortars. The presumed similarities between the characteristics of metakaolin and those of a powdered (<45μm) fired clay brick clean waste (CBW) led to the investigation of the effect on the durability of mortars of partial replacement (10, 25 and 40wt.%) of Portland cement by CBW. Properties such as 28 and 90days-compressive strength, water absorption, apparent porosity, absorption by capillarity, chloride retention, carbonation depth and sulphate resistance were evaluated. The CBW-containing cured mortars showed improved strength and density, as the result of combined physical and pozzolanic pore filling effect of added CBW. However, CBW-free mortar exhibited larger spreading and, being more porous, higher sulphate resistance and ability to absorb chlorides. Optimum performance was found for the 40wt.% CBW mortar whose compressive strength can be up to 130% higher than that of the CBW-free mortar.
Influence of fired clay brick waste additions on the durability of mortars
Schackow, A. (author) / Stringari, D. (author) / Senff, L. (author) / Correia, S.L. (author) / Segadães, A.M. (author)
Cement and Concrete Composites ; 62 ; 82-89
2015-04-29
8 pages
Article (Journal)
Electronic Resource
English
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