Development of Green Concrete Containing Ternary High Volume SCMs and its In-situ Application

Recently, the use of cement-less concrete containing high volumes of fly ash, and GGBFS instead of purely Portland cement is increasing recently in Korea to reduce energy consumption and the embodied CO₂ of structures.

However, as the contents of supplementary cementitious materials (SCMs) increase within the concrete binder, so the early-age compressive strength within 14 days is usually less than normal concrete. In order to improve this early-age compressive strength, a green concrete was developed containing two types of high volume SCMs, such as maximum 70% of GGBFS and fly ash below 40% of total content, to replace cement content using an acceleration chemical admixture.

Adiabatic temperature rise tests were conducted to evaluate the thermal and low-heat properties of green concrete with various cement and SCMs content suitable for mass concrete structures.

Recently this green concrete containing only 20% cement and 80% SCMs was applied for the placement of in-situ mass foundations of both buildings and bridges.