Published Online:July 2024
Product Name:The IUP Journal of Structural Engineering
Product Type:Article
Product Code:
Author Name:Sujay C Deshpande and Nausheen M Khanapuri
Availability:YES
Subject/Domain:Engineering
Download Format:PDF
Pages:13
Alkali Activated Concrete (AAC), which utilizes industrial byproducts such as fly ash and slag, has emerged as a promising eco-friendly substitute. This paper evaluates the mechanical properties and environmental benefits of AAC, emphasizing its potential to replace Ordinary Portland Cement (OPC) in contemporary constructions. It examines the geopolymerization process, where aluminosilicate materials react in an alkaline environment to create a binder. The results show that AAC achieves optimal compressive strength with a 3% alkaline activator dosage, while higher dosages up to 5% decrease strength. Additionally, a silicate modulus of 1.25 provides the best compressive strength. The results also indicate that AAC, with a 1.25 silicate modulus and 3% activator dosage, outperforms control concrete in split-tensile strength and flexural strength assessments. Furthermore, AAC substantially lowers the carbon footprint of construction materials. This reduction is further enhanced by lower energy consumption during the manufacturing process, highlighting AAC’s contribution to sustainable construction practices. The findings confirm that AAC not only matches but often surpasses the performance of traditional concrete, making it a viable and environment-friendly alternative with excellent mechanical properties. Transitioning to AAC can significantly help the construction industry achieve its sustainability goals, fostering more responsible building practices for the future.
The increasing demand for shelter and industrialization has led to a rapid rise in the use of concrete. Today, most infrastructure is constructed with concrete, and Ordinary Portland Cement (OPC) is a primary ingredient in its production. Along with water, concrete ranks among the most used substances globally. The maturation of lowcarbon binders has been identified as a key strategy for reducing CO2 emission (Dang et al., 2024).