Abstract
This study investigated the effect of red-clay brick and perlite wastes (RCBW and PW) on the performance and rehydration of katoite-based binder after exposure to elevated temperatures. The KT-binder was produced by combining dolomite waste with sodium aluminate. The exposure of KT binder to temperatures up to 1000 °C (CA-1000) caused a significant compressive strength loss associated with the decomposition of KTand other phases into mayenite, sodium aluminate, and lime. The CA-1000 acts as a one-part alkali-activated binder, as it can re-interact with water to yield a layered double hydroxide-based binder with 1-day compressive strength of 9.7 MPa and volume expansion of 160%. The individual inclusion of 50 wt% RCBW and PW improved the thermal resistance of the CA-binder but decreased its ability to rehydrate, as they hindered the reformation of sodium aluminate and mayenite through the formation of lower hydraulic calcium/sodium aluminosilicates.
Original language | English |
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Article number | 135281 |
Journal | Materials Letters |
Volume | 353 |
DOIs | |
Publication status | Published - Dec 1 2023 |
Keywords
- Amorphous materials
- Crystal structure
- Microstructure
- Sintering
- Thermal properties
- XRD
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering