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.