Relation Between Hydration of Slag Sand and Mechanical Properties of Concrete

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Title: Relation Between Hydration of Slag Sand and Mechanical Properties of Concrete

Author(s): Shigeyoshi Nagataki, Makoto Takada, and Etsuro Sakai

Publication: Special Publication

Volume: 79

Issue:

Appears on pages(s): 1075-1090

Keywords: blast furnace slag; curing; fine aggregates; hydration; microcracking;pozzolans; tensile strength.

Date: 5/1/1983

Abstract:
The potential hydraulicity of granulated blast-furnace slag sand in concrete governs the characteristics of concrete. Physical properties of concrete, and particularly, the structure of the hydrated layer formed at the surface of the granulated blast-furnace slag sand, the hydration activity of the granulated blast-furnace slag sand and the decline in the mechanical properties after drying of concrete were followed. The physical properties of concrete are influenced by the hydration reaction layers formed around granulated blast-furnace slag sand particles. The strength reduction due to drying may be due to the embrittlement of the hydration reaction layers or the formation of microcracks.