A Binder of Phosphogypsum-Ground Granulated Blast Furnace Slag-Ordinary Portland Cement

A new hydraulic cementitious binder was developed by mainly utilizing industrial byproducts phosphogypsum（PG）and ground granulated blast furnace slag（GGBFS）with small addition of ordinary portland cement（OPC）.The hydration process and microstructure were studied by X-ray diffraction（XRD） and scannin...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2011-06, Vol.26 (3), p.548-551
Main Authors: Huang, Yun, Lin, Zongshou
Format: Article
Language:English
Subjects:
Age
Binders
Chemistry and Materials Science
CSH凝胶
Ettringite
Hydration
Materials Science
Microstructure
Portland cements
Process control
Strength
地面
扫描电子显微镜
普通硅酸盐水泥
矿渣微粉
磷石膏
粒化高炉矿渣
粘合剂
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new hydraulic cementitious binder was developed by mainly utilizing industrial byproducts phosphogypsum（PG）and ground granulated blast furnace slag（GGBFS）with small addition of ordinary portland cement（OPC）.The hydration process and microstructure were studied by X-ray diffraction（XRD） and scanning electronic microscopy（SEM）.OPC hydrated first at early age to form primarily C-S-H gel,ettringite and calcium hydroxide（CH）.GGBFS activated by CH and sulfate ions hydrated continuously at later age,producing more and more hydration products,C-S-H gel and ettringite.Thus the paste developed a denser microstructure and its strength increased.The 28 d compressive strength of the mixture of 50%PG,46% GGBFS and 4%OPC exceeded 45 MPa.The setting time was faster and 3 d and 7 d strength were higher when the proportion of OPC increased.But the 28 d strength decreased when OPC exceeded 4%due to large amount of ettringite formed at late hydration age which damaged the microstructure.
ISSN:1000-2413
1993-0437
DOI:10.1007/s11595-011-0265-6