Paper Title:
Effect of Inorganic Salts on Pore Structure of Cement Paste
  Abstract

Inorganic salts are important admixtures usually used in cold weather concrete. As research basic of influence of salts on concrete durability, effects of inorganic salts on pore structure of cement paste were studied in this paper, and possible implications of concrete property with pore structure was also analyzed. Pore structure of paste added CaCl2, NaCl, Na2SO4, NaNO2, Ca(NO3)2 and Ca(NO2)2 curing for 3 days and 28 days were tested through mercury intrusion porosimetry (MIP). The results showed that no matter 0.3 or 0.5 water-cement ratio, the pores whose diameter <50nm in paste with salts increased at 3 days, which was harmful for the control of concrete shrinkage and cracking at early age. Adding Ca (NO3)2 increased coarse pores (>200nm) of paste at 3 days, but these coarse pores turned into fine pores and reduced significantly at 28 days. Adding NaCl and Na2SO4 into cement paste raised coarse pores with size>1000nm at 3 days and 28days, which were harmful for the pore structure.

  Info
Periodical
Key Engineering Materials (Volumes 405-406)
Edited by
Hao-Wen YE and Gai-Fei PENG
Pages
378-383
DOI
10.4028/www.scientific.net/KEM.405-406.378
Citation
W. C. Yang, Y. Ge, J. Yuan, B. S. Zhang, "Effect of Inorganic Salts on Pore Structure of Cement Paste", Key Engineering Materials, Vols. 405-406, pp. 378-383, 2009
Online since
January 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ya Qing Jiang, Qian Feng Xia
Abstract:Hydration characteristic and microstructures of water entrained cement paste with water-cement ratio (w/c) of 0.30 cured under saturated...
2249
Authors: Jun Zhao, Gao Chuang Cai, Dan Ying Gao
Abstract:The binding properties of chloride ion of sulphoaluminate cement and portland cement were studied in different age,different water-cement...
698
Authors: Bao Lin Zhu, Xin Huang, Ye Guo
Abstract:On the basis of the principle for the highest filling degree of cement hydrates, it is synthetically considered that a matching connection...
118
Authors: Ya Jun Wang, Jian Jun Wang, Chang Ying Guo, Meng Xing Cao
Chapter 2: Applications of Materials in Manufacturing Technologies, Materials Science and Engineering
Abstract:It analyzed the reasons for the early cracks in high-performance concrete, and prepared overall program to improve the mechanical properties...
504