Discussion on the Mechanism of the Resistance of Alkali-ActivatedCementing Material to External Sulfate Attack
[1]ZHENG Juanrong,YANG Changli,CHEN Youzhi.Discussion on the Mechanism of the Resistance of Alkali-ActivatedCementing Material to External Sulfate Attack[J].Journal of Zhengzhou University (Engineering Science),2012,33(03):1-4.[doi:10.3969/j.issn.1671-6833.2012.03.001]
Copy
Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
33
Number of periods:
2012 03
Page number:
1-4
Column:
Public date:
2012-05-10
- Title:
- Discussion on the Mechanism of the Resistance of Alkali-ActivatedCementing Material to External Sulfate Attack
- Keywords:
- alkali-activated cementing material; sulfate attack; cycles of weting and drying; X-ray diffraction analysis; sodium sulfate salt-crystallization
- CLC:
- TQ172
- Abstract:
- This paper diseusses on the mechanism of the resistance of alkali-activated slag, alkali-activatedfly-ash, alkali-activated metakaolinite and ordinary Portland cement used as control sample to exteral sulfateattack. Aecelerated test method (i. e. cycles of weting and drying ) and X-ray diffraction ( XRD) analysis ofthe products of alkali-activated cementing materials after external sulfate attack were used in this paper, ltdraws a conclusion that alkali-activated cementing material mortars are broken because of volume expansionproduced external sodium sulfate salt-crystallization in the pore of the mortars, while ordinary Portland cementmortar is broken because of forming gypsum and external sodium sulfate salt-crystallization with volume expan-sion in sodium sulfate solution of 5% concentration.
- References:
- -
- Similar References:
Memo
-
Last Update:
1900-01-01