Preparation of phosphorous slag-based cementitious material with high early strength and its concrete properties

DOI

10.2991/iccahe-16.2016.78How to use a DOI?

Keywords

Rapid hardening; High early strength; Phosphorous slag; Alkali-activated cementitious material; Microstructure;

Abstract

The phosphorous slag-based cementitious material (PSBCM) with rapid hardening and high early strength was obtained by incorporation of graphite tailing powder, Portland cement, silica fume and mineral material A. The microstructure of hardened paste was investigated by Scanning Electron Microscope. Based on the optimal mix proportion of PSBCM, phosphorous slag-based concretes with different strength grades, i.e. C30, C40 and C50, were prepared and their physical and mechanical properties were tested. The results showed that the optimal mix proportion of PSBCM was that the content of phosphorous slag was 79%, while the contents of graphite tailings, Portland cement, mineral material A and silica fume were 5%, 9%, 5% and 2%, respectively. As the incorporation of sodium silicate (5%, Cal.as Na2O) as well as chemical A (1%) in PSBCM, the 1-d compressive strength and flexural strength of the material were 16.1 MPa and 3.5MPa, respectively, and the initial setting time was 30 min. Scanning Electronic Microscope confirmed a rapid hardening characteristic of this PSBCM and a very compact microstructure, which would endow the hardened paste with a high early mechanical property. The experiments of properties of PSBCM concretes demonstrated that these concretes has a high early strength, and the workability of PSBCM concrete was better than that of Portland cement concrete with the same strength grade.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Jiuyan Liu
AU  - Yanzhou Peng
AU  - Buyun Yang
AU  - Ji Xiao
AU  - Gang Xu
AU  - Jun Zhang
PY  - 2016/10
DA  - 2016/10
TI  - Preparation of phosphorous slag-based cementitious material with high early strength and its concrete properties
BT  - Proceedings of the 2016 5th International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2016)
PB  - Atlantis Press
SP  - 463
EP  - 469
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccahe-16.2016.78
DO  - 10.2991/iccahe-16.2016.78
ID  - Liu2016/10
ER  -