Influence of pozzolanic activity of coal gangue on hydration products in coal gangue-cement system

Author

Gu Bingwei ; Wang Peiming

Author_Institution

Sch. of Civil Eng., Huaihai Inst. of Technol., Lianyungang, China

fYear

2010

fDate

26-28 June 2010

Firstpage

4427

Lastpage

4431

Abstract

Qualitative and quantitative analysis of the composition in the paste of complex cements have been determined by means of X-ray diffraction (XRD),differential scanning calorimetry (DSC) and directly-heating method. Results show that the composition of hydration products in coal gangue-cement complex system is similar to that in pure cement system, but the content of hydration products for per unit cement in former is higher than that in later at the early hydration stage. The pozzolanic reaction between coal gangue and cement hydration products mainly occurs in 3d. The content of Ca(OH)₂ and that of C-S-H in the paste are related to the activity and the content of coal gangue. The content of C-S-H in high activity coal gangue-cement system is related to the activity of coal gangue rather than the content, but that is opposite in low activity one.

Keywords

X-ray diffraction; cements (building materials); coal; differential scanning calorimetry; process heating; solvation; CSH; Ca(OH)₂; X-ray diffraction; coal gangue-cement system; complex cement paste; differential scanning calorimetry; directly-heating method; hydration products; pozzolanic activity; Building materials; Civil engineering; Composite materials; Concrete; Educational products; Educational technology; Laboratories; Minerals; Systems engineering education; X-ray scattering; coal gangue; coal gangue complex cement; hydration products; pozzolanic activity;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechanic Automation and Control Engineering (MACE), 2010 International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-7737-1

Type

conf

DOI

10.1109/MACE.2010.5536553

Filename

5536553