Analysis of environmental performance indicators for concrete block manufacturing: embodied energy, CO2 emissions, and water consumption.

ABSTRACT

Concrete block production significantly contributes to environmental degradation. A thorough understanding of its ecological implications is critical for sustainable development. This study investigates concrete block manufacturing's environmental impact by quantifying embodied energy, CO2 emissions, and water consumption via a comprehensive life cycle assessment. An extended life cycle assessment methodology is utilized to quantify the environmental indicators throughout the concrete block production lifecycle. Primary industry data and secondary research data ensure accuracy and reliability. Findings showed that concrete block manufacturing requires 2.5-4.1 times more embodied energy than equal clinker mass. Cement and aggregate production and transportation account for substantial energy needs. Limestone calcination during cement production causes significant CO2 emissions, 2.3-3.3 times higher than the minimum. Water consumption is concerning during curing and washing. Exploring alternative cementitious materials, optimized processes, and water recycling can reduce embodied energy by up to 75%, CO2 emissions by up to 67%, and water consumption by up to 80%. Concrete block manufacturing necessitates considerable energy and generates significant emissions. Implementing sustainable measures can minimize embodied energy, CO2 emissions, and water consumption, enabling environmentally responsible manufacturing. This research emphasizes adopting sustainability practices to mitigate environmental impact. Policymakers, industry professionals, and researchers can employ these insights to develop effective strategies promoting green manufacturing. The concrete block industry can contribute to a sustainable future through sustainable practices.