Effect of heat generation from cement hydration on mass concrete placement

摘要: Construction of a concrete dam requires large volume concrete. Due to the small surface area-to-volume ratio, dams are often subjected high potential thermal cracking, caused by heat generation from cement hydration. To reduce cracking and ensure structure safety, is constructed with low heatgenerating separated blocks having relative thin lift thickness. In Korea, Type IV has been mainly used temperature rise. Although benefits using supplementary cementitious materials (SCMs) in have recognized, practice SCMs not very common due concern for safety. On other hand, increasing thickness accelerate construction always demand. The purpose this research explore use fly ash as replacement Korea determine proper construction. present study, chemical compositions fineness characterized. hydration I studied compared. distributions cracks block four different thicknesses (1.5m, 2m, 2.5m, 3m) analyzed FEM commercial software ANSYS. results indicate that 40% shows similar compressive strength at 28 days also cost savings 25%. A equal or less than 1.5m showed little