Effect of inorganic salts on degree of hydration and pore structure of cement pastes

Wencui Yang; Yong Ge; Jie Yuan; Baosheng Zhang

Effect of inorganic salts on degree of hydration and pore structure of cement pastes

Wencui Yang
, Yong Ge^*
, Jie Yuan
, Baosheng Zhang

^*Corresponding author for this work

School of Transportation Science and Engineering, Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The pore structures of cement paste with a water-cement ratio of 0.3 and 0.5 in mass, containing inorganic salts admixture (CaCl₂, Na₂SO₄, NaNO₂ and Ca(NO₃)₂) were studied by mercury intrusion porosimetry at 3 d and 28 d. The hydration degree of cement pastes was also analyzed. The results show that CaCl₂, Na₂SO₄ and NaNO₂ can improve the hydration of cement. The accelerating effect of CaCl₂ is dominant, compared to the other salts. CaCl₂ can also reduce the porosity of the coarse pores and capillary pores of the pastes, and Na₂SO₄ can increase the porosity of the coarse pores in cement pastes. The throat size of an interconnected capillary network and the porosity of the capillary pores in pastes with NaNO₂ at 28 d decrease. Ca(NO₃)₂ does not improve the cement hydration during 3 d, but it can increase the porosity of the coarse pores or the capillary pores as well as the throat size in the paste at 3 d.

Original language	English
Pages (from-to)	622-626
Number of pages	5
Journal	Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society
Volume	37
Issue number	4
State	Published - Apr 2009
Externally published	Yes

Keywords

Inorganic salts
Mercury intrusion porosimetry
Paste
Pore structure

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title = "Effect of inorganic salts on degree of hydration and pore structure of cement pastes",

abstract = "The pore structures of cement paste with a water-cement ratio of 0.3 and 0.5 in mass, containing inorganic salts admixture (CaCl2, Na2SO4, NaNO2 and Ca(NO3)2) were studied by mercury intrusion porosimetry at 3 d and 28 d. The hydration degree of cement pastes was also analyzed. The results show that CaCl2, Na2SO4 and NaNO2 can improve the hydration of cement. The accelerating effect of CaCl2 is dominant, compared to the other salts. CaCl2 can also reduce the porosity of the coarse pores and capillary pores of the pastes, and Na2SO4 can increase the porosity of the coarse pores in cement pastes. The throat size of an interconnected capillary network and the porosity of the capillary pores in pastes with NaNO2 at 28 d decrease. Ca(NO3)2 does not improve the cement hydration during 3 d, but it can increase the porosity of the coarse pores or the capillary pores as well as the throat size in the paste at 3 d.",

keywords = "Inorganic salts, Mercury intrusion porosimetry, Paste, Pore structure",

author = "Wencui Yang and Yong Ge and Jie Yuan and Baosheng Zhang",

year = "2009",

month = apr,

language = "英语",

volume = "37",

pages = "622--626",

journal = "Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society",

issn = "0454-5648",

publisher = "Chinese Ceramic Society",

number = "4",

}

TY - JOUR

T1 - Effect of inorganic salts on degree of hydration and pore structure of cement pastes

AU - Yang, Wencui

AU - Ge, Yong

AU - Yuan, Jie

AU - Zhang, Baosheng

PY - 2009/4

Y1 - 2009/4

N2 - The pore structures of cement paste with a water-cement ratio of 0.3 and 0.5 in mass, containing inorganic salts admixture (CaCl2, Na2SO4, NaNO2 and Ca(NO3)2) were studied by mercury intrusion porosimetry at 3 d and 28 d. The hydration degree of cement pastes was also analyzed. The results show that CaCl2, Na2SO4 and NaNO2 can improve the hydration of cement. The accelerating effect of CaCl2 is dominant, compared to the other salts. CaCl2 can also reduce the porosity of the coarse pores and capillary pores of the pastes, and Na2SO4 can increase the porosity of the coarse pores in cement pastes. The throat size of an interconnected capillary network and the porosity of the capillary pores in pastes with NaNO2 at 28 d decrease. Ca(NO3)2 does not improve the cement hydration during 3 d, but it can increase the porosity of the coarse pores or the capillary pores as well as the throat size in the paste at 3 d.

AB - The pore structures of cement paste with a water-cement ratio of 0.3 and 0.5 in mass, containing inorganic salts admixture (CaCl2, Na2SO4, NaNO2 and Ca(NO3)2) were studied by mercury intrusion porosimetry at 3 d and 28 d. The hydration degree of cement pastes was also analyzed. The results show that CaCl2, Na2SO4 and NaNO2 can improve the hydration of cement. The accelerating effect of CaCl2 is dominant, compared to the other salts. CaCl2 can also reduce the porosity of the coarse pores and capillary pores of the pastes, and Na2SO4 can increase the porosity of the coarse pores in cement pastes. The throat size of an interconnected capillary network and the porosity of the capillary pores in pastes with NaNO2 at 28 d decrease. Ca(NO3)2 does not improve the cement hydration during 3 d, but it can increase the porosity of the coarse pores or the capillary pores as well as the throat size in the paste at 3 d.

KW - Inorganic salts

KW - Mercury intrusion porosimetry

KW - Paste

KW - Pore structure

UR - https://www.scopus.com/pages/publications/65349153083

M3 - 文章

AN - SCOPUS:65349153083

SN - 0454-5648

VL - 37

SP - 622

EP - 626

JO - Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society

JF - Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society

IS - 4

ER -

Effect of inorganic salts on degree of hydration and pore structure of cement pastes

Abstract

Keywords

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