Influence of fired clay brick waste additions on the durability of mortars
authors Schackow, A; Stringari, D; Senff, L; Correia, SL; Segadaes, AM
nationality International
journal CEMENT & CONCRETE COMPOSITES
author keywords Clay brick waste; Metakaolin; Durability; Mortar; Sulphate resistance; Carbonation
keywords NATURAL POZZOLANS; CONCRETE; METAKAOLIN; RESISTANCE; BEHAVIOR; PERFORMANCE; CARBONATION; KAOLINITE; CHLORIDE; KINETICS
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 (<45 mu m) fired clay brick clean waste (CBW) led to the investigation of the effect on the durability of mortars of partial replacement (10, 25 and 40 wt.%) of Portland cement by CBW. Properties such as 28 and 90 days-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 40 wt.% CBW mortar whose compressive strength can be up to 130% higher than that of the CBW-free mortar. (C) 2015 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0958-9465
year published 2015
volume 62
beginning page 82
ending page 89
digital object identifier (doi) 10.1016/j.cemconcomp.2015.04.019
web of science category Construction & Building Technology; Materials Science, Composites
subject category Construction & Building Technology; Materials Science
unique article identifier WOS:000361577800010
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journal impact factor 4.660
5 year journal impact factor 5.515
category normalized journal impact factor percentile 93.176
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