Comparative study of some mechanical properties and economic indicators between conventional concrete and slag-compacted concrete in traffic roads

Abstract

This paper aims to evaluate the mechanical properties and construction costs of roads using conventional concrete (PCC) and slag roller compacted concrete (RCC) of the same design grade. In this experimental study, the properties tested in this paper are compressive strength (CĐCN), flexural tensile strength (CĐCU) and construction costs. For this purpose, three main roller compacted concrete mixtures were designed containing three levels of blast furnace slag (0%, 15% and 30% by weight of cementitious materials) at optimum moisture content and conventional concrete mixtures. The test results showed that at 7 days of age, the CĐCN and CĐCU of RCC were higher than that of PCC, especially at 0% slag, which were 29.9% and 27%, respectively. At 28 days of age, 15% RCC had the highest CĐCN and CĐCU, increasing by 9.1% and 17.6% respectively compared to PCC. Regarding construction costs, RCC at all 3 slag levels had lower costs from 31.2% to 34.7% compared to PCC.