Properties of Cast-In-Place Concrete and Precast Concrete Blocks Incorporating Waste Glass Powder
Narayanan Neithalath *, 1, Nathan Schwarz 2
Identifiers and Pagination:Year: 2009
First Page: 42
Last Page: 51
Publisher Id: TOBCTJ-3-42
Article History:Received Date: 12/11/2008
Revision Received Date: 12/01/2009
Acceptance Date: 4/02/2009
Electronic publication date: 24/4/2009
Collection year: 2009
open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
This paper deals with studies on the use of waste glass powder as an effective ingredient in concrete. Studies on cement pastes including mechanical property tests and thermal analysis were used to understand the influence of the glass powder on the cement hydration process and to arrive at an optimal dosage range. Cast-in-place concrete and block mixtures were proportioned with varying dosages of glass powder, and tests for mechanical properties, alkali-silica reaction, and water absorption were carried out. The use of fly ash as a cement replacement material was also adopted in one of the concrete mixtures to compare the performance of glass powder and fly ash in concrete. Though the complete effect of cement dilution was not overcome by the chosen dosage of glass powder, the strength results were comparable to that of control concrete. Moisture intake results of glass powder modified concrete mixtures showed lower total water absorption as well as sorptivity than the control concrete when cured for a longer duration. The expansion due to alkali-silica reaction was also lower for the glass powder modified mixtures. For the concrete block mixtures, it was found that moist curing the blocks after initial steam curing was beneficial in strength improvement. Replacement of 10% cement with glass powder was found to result in equal or higher compressive strengths of the blocks. In regions where glass powder is locally available, its use as a cement replacement material presents an efficient waste management option, without compromising concrete performance.