Physical Properties of Activated Slag Concrete Using Phosphogypsum and Waste Lime as an Activator

Title
Physical Properties of Activated Slag Concrete Using Phosphogypsum and Waste Lime as an Activator
Author(s)
형원길윤성진[윤성진]문경주[문경주]
Keywords
BLAST-FURNACE SLAG; SUPERSULFATED CEMENT; FLY-ASH; HYDRATION; BINDER
Issue Date
201501
Publisher
ARCHITECTURAL INST JAPAN
Citation
JOURNAL OF ASIAN ARCHITECTURE AND BUILDING ENGINEERING, v.14, no.1, pp.189 - 195
Abstract
This study aims to evaluate the physical properties of non-sintering cement (NSC) concrete by adding phosphogypsum (PG) and waste lime (WL) to granulated blast furnace slag (GBFS) as sulfate and alkali activators. The study measured changes in the physical properties of fresh concrete using NSC, and the compressive, flexural and tensile strength of the hardened concrete for 360 days. In the results of the experiment, concrete using NSC was superior to that using Ordinary Portland Cement (OPC) or blast-furnace slag cement (BSC) in terms of fluidity and hydration heat characteristics. In addition, the early strength of concrete using NSC was relatively low at around 85% of the strength of concrete using OPC on day 3, but this was reversed from day 7 and the difference between OPC and BSC grew steadily larger over time until day 360. The strength of concrete using NSC develops continuously because the GBFS component eluting as GBFS is activated by PG and WL, and due to their reaction, ettringite, C-S-H gel, etc. are generated steadily for a long time, and there is no transition zone in the interface between the aggregate and paste because Ca (OH)(2) is hardly generated from the hydration process, and as a result, interfacial adhesion is reinforced with aging.
URI
http://hdl.handle.net/YU.REPOSITORY/33674
ISSN
1346-7581
Appears in Collections:
건축학부 > 건축학부 > Articles
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