|
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. |
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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 |
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unique article identifier |
WOS:000361577800010
|
