Alkali activated slag pastes with surface-modified blast furnace slag

G. M. Kim; Hammad R. Khalid; H. J. Kim; H. K. Lee

doi:10.1016/j.cemconcomp.2016.11.009

Alkali activated slag pastes with surface-modified blast furnace slag

G. M. Kim, Hammad R. Khalid, H. J. Kim, H. K. Lee^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

A surface modification method for blast furnace slag particles is newly proposed to retard the setting time and to mitigate the flow loss in alkali activated slag pastes. BFS particles were treated by a NaOH solution and then were carbonated to modify the surface of the particles. This leads to suppression of the dissolution of the reactive components at the initial stage of the reaction. The effect of the carbonation period and the modifying solution on the physicochemical characteristics of surface-modified BFS particles was investigated. The reaction and mechanical characteristics of AAS pastes produced from surface-modified BFS were also investigated. The test results show that the developed AAS pastes exhibited the delayed setting behavior and the retarded flow loss, and had a compressive strength comparable to those of AAS pastes produced from unmodified BFS.

Original language	English
Pages (from-to)	39-47
Number of pages	9
Journal	Cement and Concrete Composites
Volume	76
DOIs	https://doi.org/10.1016/j.cemconcomp.2016.11.009
Publication status	Published - 1 Feb 2017
Externally published	Yes

Keywords

Alkali activated slag
Carbonation
Flow loss
Setting times
Surface modification

Access to Document

10.1016/j.cemconcomp.2016.11.009

Cite this

@article{da5ec03304c7486da02363023f296ea1,

title = "Alkali activated slag pastes with surface-modified blast furnace slag",

abstract = "A surface modification method for blast furnace slag particles is newly proposed to retard the setting time and to mitigate the flow loss in alkali activated slag pastes. BFS particles were treated by a NaOH solution and then were carbonated to modify the surface of the particles. This leads to suppression of the dissolution of the reactive components at the initial stage of the reaction. The effect of the carbonation period and the modifying solution on the physicochemical characteristics of surface-modified BFS particles was investigated. The reaction and mechanical characteristics of AAS pastes produced from surface-modified BFS were also investigated. The test results show that the developed AAS pastes exhibited the delayed setting behavior and the retarded flow loss, and had a compressive strength comparable to those of AAS pastes produced from unmodified BFS.",

keywords = "Alkali activated slag, Carbonation, Flow loss, Setting times, Surface modification",

author = "Kim, \{G. M.\} and Khalid, \{Hammad R.\} and Kim, \{H. J.\} and Lee, \{H. K.\}",

note = "Publisher Copyright: {\textcopyright} 2016",

year = "2017",

month = feb,

day = "1",

doi = "10.1016/j.cemconcomp.2016.11.009",

language = "English",

volume = "76",

pages = "39--47",

journal = "Cement and Concrete Composites",

issn = "0958-9465",

publisher = "Elsevier",

}

TY - JOUR

T1 - Alkali activated slag pastes with surface-modified blast furnace slag

AU - Kim, G. M.

AU - Khalid, Hammad R.

AU - Kim, H. J.

AU - Lee, H. K.

PY - 2017/2/1

Y1 - 2017/2/1

N2 - A surface modification method for blast furnace slag particles is newly proposed to retard the setting time and to mitigate the flow loss in alkali activated slag pastes. BFS particles were treated by a NaOH solution and then were carbonated to modify the surface of the particles. This leads to suppression of the dissolution of the reactive components at the initial stage of the reaction. The effect of the carbonation period and the modifying solution on the physicochemical characteristics of surface-modified BFS particles was investigated. The reaction and mechanical characteristics of AAS pastes produced from surface-modified BFS were also investigated. The test results show that the developed AAS pastes exhibited the delayed setting behavior and the retarded flow loss, and had a compressive strength comparable to those of AAS pastes produced from unmodified BFS.

AB - A surface modification method for blast furnace slag particles is newly proposed to retard the setting time and to mitigate the flow loss in alkali activated slag pastes. BFS particles were treated by a NaOH solution and then were carbonated to modify the surface of the particles. This leads to suppression of the dissolution of the reactive components at the initial stage of the reaction. The effect of the carbonation period and the modifying solution on the physicochemical characteristics of surface-modified BFS particles was investigated. The reaction and mechanical characteristics of AAS pastes produced from surface-modified BFS were also investigated. The test results show that the developed AAS pastes exhibited the delayed setting behavior and the retarded flow loss, and had a compressive strength comparable to those of AAS pastes produced from unmodified BFS.

KW - Alkali activated slag

KW - Carbonation

KW - Flow loss

KW - Setting times

KW - Surface modification

UR - https://www.scopus.com/pages/publications/85002292148

U2 - 10.1016/j.cemconcomp.2016.11.009

DO - 10.1016/j.cemconcomp.2016.11.009

M3 - Article

AN - SCOPUS:85002292148

SN - 0958-9465

VL - 76

SP - 39

EP - 47

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

ER -

Alkali activated slag pastes with surface-modified blast furnace slag

Abstract

Keywords

Access to Document

Other files and links

Cite this