Performance Evaluation of Low-Carbon Concrete Incorporating Agricultural Ash Waste under Tropical Environmental Conditions
Keywords:
Low-Carbon Concrete, Agricultural Ash Waste, Tropical Climate, , Mechanical Performance, SustainabilityAbstract
Purpose: This study aims to evaluate the performance of low-carbon concrete incorporating agricultural ash waste under tropical environmental conditions, focusing on mechanical properties, durability, and environmental benefits from partial cement replacement.
Subjects and Methods: An experimental investigation was conducted on concrete mixtures with varying levels of agricultural ash substitution. Tests included compressive strength, tensile strength, water absorption, and microstructural analysis to assess mechanical performance, physical characteristics, and durability. The influence of tropical conditions, particularly high temperature and humidity, on hydration and curing behavior was also examined.
Results: The findings demonstrate that optimized agricultural ash replacement levels can maintain or enhance compressive and tensile strength. Improved particle packing and secondary pozzolanic reactions contributed to matrix densification. Reduced porosity and lower water absorption enhanced resistance to moisture penetration and environmental degradation. However, tropical climate conditions significantly influenced hydration kinetics, highlighting the need for appropriate curing strategies to achieve optimal long-term durability. Environmentally, partial cement replacement substantially reduced carbon emissions and promoted sustainable waste utilization.
Conclusions: Agricultural ash-based low-carbon concrete shows strong potential as a sustainable construction material in tropical regions, providing both structural performance and environmental advantages while supporting climate change mitigation efforts.
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