File Download

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

오재은

Oh, Jae Eun
Nano-AIMS Structural Materials Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Influence of Calcium Sulfate Type on Evolution of Reaction Products and Strength in NaOH- and CaO-Activated Ground Granulated Blast-Furnace Slag

Author(s)
Yoon, SeyoonPark, HyeoneunYum, Woo SungSuh, Jung-IlOh, Jae Eun
Issued Date
2018-12
DOI
10.3390/app8122500
URI
https://scholarworks.unist.ac.kr/handle/201301/25422
Fulltext
https://www.mdpi.com/2076-3417/8/12/2500
Citation
APPLIED SCIENCES-BASEL, v.8, no.12, pp.2500
Abstract
This study investigated the influences of CaSO4 type (i.e., anhydrite vs. gypsum) on strength development and reaction products in the activation of ground granulated blast-furnace slag (GGBFS) when different activators (i.e., CaO vs. NaOH) and sources of GGBFS were used. In the CaO-activation, the addition of calcium sulfates greatly enhanced 28-day strengths, regardless of the choice of CaSO4 or GGBFS source, through increasing the quantities of reaction products and reducing pore volume and size. However, in the NaOH-activation, the use of calcium sulfates showed the complex dependency of strength on the choice of CaSO4 type and GGBFS source, and it barely produced beneficial effects on the quantity of reaction products and reduction of pore volume and size. Thus, the results in this study indicate that the combination of CaO-activation and calcium sulfates is a more effective means of activating GGBFS to gain enhanced strength and significant quality control than the use of gypsum with NaOH-activation.
Publisher
MDPI
ISSN
2076-3417
Keyword (Author)
GGBFSalkaline activationCaO-activationanhydritegypsum
Keyword
FLY-ASHHYDRATIONSYSTEMSBEHAVIORBINDERSPASTESGYPSUM

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.