Uncovering the role of micro silica in hydration of ultra-high performance concrete (UHPC) SCIE SCOPUS

Cited 53 time in WEB OF SCIENCE Cited 63 time in Scopus
Title
Uncovering the role of micro silica in hydration of ultra-high performance concrete (UHPC)
Author(s)
Lee, Nam Kon; Koh, K. T.; Kim, Min Ook; Ryu, G. S.
Publication Year
2018-02
Abstract
This study aims to clarify the role of micro silica in hydration of UHPC. The behavior of two different types of micro silica in UHPC was investigated with regard to their filler effect and pozzolanic reaction by using analytical techniques; XRD, TG, Si-29 and Al-27 NMR spectroscopy, and MIP. The micro silica with high pozzolanic activity led to the higher level of Al-substitution for Si in C-S-H and the denser structure, thus increasing compressive strength, whereas that facilitating filler effect limited the consumption of Ca(OH)(2) even after high temperature curing and led to the higher amount of AFm phase. In the UHPC showing high filler effect, additional hydration of C3S and C2S occurred at later ages, increasing the fraction of Q(1) site in C-S-H and decreasing the porosity in the pore diameter region below 10 nm. Consequently, a significant increase in the compressive strength of this UHPC was achieved.
ISSN
0008-8846
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1019
DOI
10.1016/j.cemconres.2017.11.002
Bibliographic Citation
CEMENT AND CONCRETE RESEARCH, v.104, pp.68 - 79, 2018
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Subject
C-S-H; SUPPLEMENTARY CEMENTITIOUS MATERIALS; MAS NMR-SPECTROSCOPY; PORTLAND-CEMENT; AMORPHOUS SILICA; ALUMINOSILICATE-HYDRATE; SECONDARY COMPONENT; CALCIUM; ALUMINUM; PASTES
Keywords
UHPC; Micro silica; Hydration product; Microstructure; Filler effect
Type
Article
Language
English
Document Type
Article
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse