Title:
Improvements in Sustainable Concrete Properties for Expanding its Utilization in Civil Construction Projects
Author(s):
Assi
Publication:
Web Session
Volume:
ws_F24_Assi.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
11/3/2024
Abstract:
The development of sustainable construction materials has been the focus of research efforts worldwide in recent years. Concrete is a major construction material; hence, finding alternatives to ordinary Portland cement is of extreme importance due to the high levels of carbon dioxide emissions associated with its manufacturing process. Geopolymer concrete has demonstrated promising mechanical and microstructural properties in comparison with conventional concrete; however, there are many limitations including but not limited to the need for external heat, activating solutions, variability found in fly ash sources and properties, and controlling initial and final setting times. The presentation will show that a significant improvement in 28-day compressive strength was achieved when the activating solution was changed. The need for external heat was eliminated and initial and final compressive strength was improved when partial Portland cement replacement was used. Initial and final setting time was extended and controlled when (3-6%) sucrose replacement of fly ash was included in the mixture. Several mechanical and durability properties were improved when two fly ash sources were utilized. In addition, the mechanical and durability properties were enhanced when different particle size distribution was used in the mixtures. These improvements will diversify sustainable concrete applications. Hence, it will increase its market share in concrete industries.