Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Durability of self-compacting earth concrete in corrosive environments to reduce greenhouse gases caused by the construction industry

Document Type : Original Article

Authors
Mehrzad Azizi 1
Kianoosh Samimi 2
1 Master student, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran
2 Assistance Professor, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran.
10.22065/jsce.2024.474655.3502
Abstract
The use of self-compacting earth concrete (SCEC) as a novel and sustainable approach in the construction industry has gained significant attention in recent years. However, the development of these concretes faces challenges. One of these challenges is the lack of sufficient information regarding the durability of SCEC under aggressive conditions. Given that earth concretes are widely used in coastal areas such as the Persian Gulf due to their favorable thermal properties, assessing the durability of these concretes against corrosive environments is of great importance. In this study, with the aim of improving the durability of SCEC, the effect of partial replacement of Portland cement with silica fume on the resistance of this concrete to chloride ion penetration and carbonation was investigated. The findings of the study indicate a positive effect of the partial replacement of Portland cement with 10% silica fume on improving resistance to corrosive and carbonated environments. In the concrete specimen containing 50% clay and 10% silica fume (C50S10), the results of chemo-mechanical tests showed an 18% improvement in compressive strength after 90 days of exposure to CO2. Additionally, the depth of carbonation penetration in this specimen was reduced by 49.9% compared to a similar mixture without silica fume (C50) at the age of 90 days. Given the importance of increasing the durability and sustainability of concrete structures in the construction industry, the results of this research can be a significant step towards the development of high-performance and environmentally friendly concretes.
Keywords
Earth concrete
Durability
Silica fume
Compressive strength
Environment

Subjects

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  • Receive Date 24 August 2024
  • Revise Date 02 October 2024
  • Accept Date 25 October 2024