Evaluation of Heat Evolution of Pastes Containing High Volume of Ground River Sand and Ground Granulated Blast Furnace Slag

Punnaman NORRARAT, Weerachart TANGCHIRAPAT, Chai JATURAPITAKKUL

Abstract


This paper investigated the heat evolution of pastes containing inert and active materials with different particle sizes. Ground river sand was used as an inert material while ground granulated blast furnace (GGBF) slag was used as an active material. Ground river sand (GRS) and GGBF slag were ground to have the same particle size and were used separately as a replacement of Portland cement type I at rates of 50 70 % by weight of the binder. Heat evolution of pastes containing GRS and GGBF slag was measured using an isothermal conduction calorimeter up to 72 h. The results showed that GRS with different particle sizes had a slight effect on the heat evolution of pastes. GGBF slag with median particle size d50 of 4.4 µm and d50 of 17.8 µm had a small effect on the heat evolution of pastes during the first 24 h, and the pastes also had very low heat evolution for up to 72 h. At the same replacement rate of Portland cement, however, the heat evolution due to the slag reaction was slightly increased when the particle size of the GGBF slag was decreased. Finally, the higher is the cement replacement by GGBF slag, the higher is the slag reaction.

DOI: http://dx.doi.org/10.5755/j01.ms.23.1.13579


Keywords


heat evolution, inert material, active material, river sand, particle size, slag reaction

Full Text: PDF

Print ISSN: 1392–1320
Online ISSN: 2029–7289