Authors : Anshar M.W. Tjaronge, Rudy Djamaluddin and A. Arwin Amiruddin
Abstract: The blended cement containing pozzolan have developed in America, Japan and many European countries. In recent decades, the blended cement consisting of by products such as fly ash has been developed by national cement factories. One of a blended cement made in Indonesia cement plant is Portland Composite Cement (PCC). At present in Indonesia the majority of construction works use PCC.Many mass concrete structures such as dams are currently being built in Indonesia with use PCC as binder. One important factor is the variation in the high temperature at the early age of the mass concrete after pouring. The strength development at early age of the mass concrete caused by the hydration heat generated from the blended cement such as PCC was a focus in this study. After fresh concrete was poured into a 1.2×1.2×1.2 m mass concrete, the temperature inside was measured to study the thermal heat produced by PCC hydration. In an effort to understand the relationship of thermal heat with the strength of mass concrete at an early age at the age of 3 and 7 days core specimens were taken to be tested for compressive strength and indirect tensile strength. From the results of testing it can be seen that the development of compressive strength and indirect tensile strength from 3-7 days in 1.2×1.2×1.2 m of mass concrete using PCC can be attributed to the hydration and interface binding process on aggregates and cement paste has been going well even though it has experienced a high temperature of 61.5°C.
Anshar M.W. Tjaronge, Rudy Djamaluddin and A. Arwin Amiruddin, 2020. Early Age Thermal Behavior and Strength of Mass Concrete using Portland Composite Cement. Journal of Engineering and Applied Sciences, 15: 2473-2477.