Comparing the eCO2 Emissions Effects of Two Slab-on-Grade Screeding Methods

Abstract

While previous research has been conducted on concrete production to improve sustainability while retaining durability and constructability, this research focuses on construction practices in slab-on- grade screeding and how project management decisions can impact eCO2 emissions. A comparative life-cycle assessment of manual and laser screed was performed in a traditional 100,000 SF slab with 6" thickness. The study aimed to determine the effects of a slab-on-grade's equivalent embodied carbon (eCO2) in commercial projects. Two embodied carbon calculators (EC3 and Green Badger) were used to examine the differences between the two methods. Industry professionals provided actual commercial project data to determine the impact of laser screed compared to manual screeding. This study found that laser screeding reduced schedule, workforce requirement, and concrete waste for the slab-on-grade installation. These results demonstrate an important reduction in embodied carbon due to reduced worker transportation and concrete manufacturing emissions. The findings also indicate that project managers can improve the environmental sustainability of their projects by using alternative techniques, such as laser screed equipment, compared to manual screeding.