Effects of insulation materials on mass concrete with pozzolans

Abstract

A mix incorporates cement(II), fly ash, and slag to design mass concrete. A simplified box is set up to measure Ko. Two blocks are established to evaluate the insulation with thin sides (1/2-in.PE; top: none) and thick sides (1-in.XPS and 1-in.EPS; top: 1-in.XPS) and wrapped with canvas. Results for Ko were 1-in.XPS<1-in.PE<1-in.EPS<1/2-in.PE. The maximum temperature differentials are less than 12°C. The insulation effect of the face was 1/2-in.PE<1-in.EPS<1-in XPS, and the top 1-in.XPS enhanced insulation effectively. The values of R2 for Ko vs. λ, λ vs. R-value, Ko and vs. R-value were 0.995, 0.987, and 0.966 to assess appropriate insulation materials.