A Study on Hydrated Phases of Ternary Blended Binder via Thermal Analysis
Replacing the cement content with alternatives material such as GGBS is a wonderful way to solve the issues of environmental degradation caused by cement manufacture. However, the concrete produced using GGBS has some drawbacks such as lower initial strength and higher dry shrinkage. Thus, the ternary blended binder replacement was proven to improve the properties of concrete due to its synergistic effect. RHA is an agricultural waste achieving broader awareness because of its considerable impact on the microstructural properties as well as improving the strength of the concrete. Therefore, in this study, cement as a primary binder containing high-volume GGBS was prepared with RHA via adiabatic temperature (steam curing) and normal curing conditions. The effects of increasing the amount of RHA pre-treated as replacement level of the primary binder with 5%, 10%, 15%, and 20%, with a constant amount of GGBS (50% of slag) were characterized using thermogravimetric analysis (TGA/DTA). The ﬁndings showed that RHA reacted as a filler and can be used as a secondary source of SiO2 in cement containing high-volume GGBS production. The inclusion of 60% replacement of RHA-GGBS improves the CSH gel due to CH consumption with SiO2 which is more prominent in long terms ages.
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