Changes in pore structure and mercury contact angle of hardened cement paste depending on relative humidity

10.1617/12685 ◽  
2005 ◽  
Vol 35 (252) ◽  
Author(s):  
J. Adolphs
Keyword(s):  
Contact Angle ◽  
Relative Humidity ◽  
Pore Structure ◽  
Cement Paste ◽  
Hardened Cement ◽  
Hardened Cement Paste

Determining the Contact Angle of Hardened Cement Paste Using Thin Layer Wicking Method

2013 ◽  
Vol 539 ◽  
pp. 184-188 ◽  
Author(s):  
Qian Tian ◽  
Hang Zhang ◽  
Yu Jiang Wang ◽  
Fei Guo ◽  
Ting Yao ◽  
...  
Keyword(s):  
Contact Angle ◽  
Thin Layer ◽  
Cement Paste ◽  
Hardened Cement ◽  
Powder Size ◽  
Hardened Cement Paste ◽  
Time Curve ◽  
Function Mechanism ◽  
Chemical Admixtures ◽  
Capillary Stress

Contact angle is a very important parameter to investigate the function mechanism of chemical admixtures as well as the capillary stress resulted from self-desiccation or drying. However, in most of the studies, it is only assumed to be 0 degrees. This paper studied the contact angle of hardened cement paste using thin wicking method. A serious of study was conducted on the influence of layer preparation, pre-contacting method, cement paste powder size, and suspension concentration on the measuring results. An optimized thin layer wicking method was proposed for determining the contact angle of hardened cement paste, which improves effectively the linear correlation of the penetration distance - time curve and satisfies the prerequisite of Washburn function.

The Influence of Pore-Strucrure on the Campressive Strength of Hardened Cement Paste

1984 ◽  
Vol 42 ◽  
Author(s):  
Huang Yiun-Yuan ◽  
Ding Wei ◽  
Lu Ping
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Pore Structure ◽  
Cement Paste ◽  
Total Porosity ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
New Information ◽  
The Relationship ◽  
Empirical Constants

AbstractThe pore-structure strongly influences the carpressive strength of hardened cement paste (hcp) and other porous materials, as well as other mechanical properties. The simplest but most currently used expression representing the relationship between the pore-structure and compressive strength is fram Balshin: σ = σ0 (l-P)A, in which only the total porosity P is involved as a single parameter and σ0 and A are empirical constants. The influence of pore size distribution and pore shapes etc. are not considered.The authors introduce second parameter w - the factor of relative specific surface area of the pores other than the total porosity P into consideration and a new expression is proposed:σc=K11-p/1+2p(K2(1-p))K3w+K4 all the constants K1 - K4 can be determined experimentally. By using of this expression the new information relating the influence of pore-structure on the caopressive strength of hcp can be predicted.

Sensitivity of concrete properties to the pore structure of hardened cement paste

1996 ◽  
Vol 26 (11) ◽  
pp. 1619-1627 ◽  
Author(s):  
Osman N. Oktar ◽  
Harun Moral ◽  
Mehmet A. Taşdemir
Keyword(s):  
Pore Structure ◽  
Cement Paste ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Concrete Properties

Relationship between chloride diffusivity and pore structure of hardened cement paste

2011 ◽  
Vol 12 (5) ◽  
pp. 360-367 ◽  
Author(s):  
Guo-wen Sun ◽  
Wei Sun ◽  
Yun-sheng Zhang ◽  
Zhi-yong Liu
Keyword(s):  
Pore Structure ◽  
Cement Paste ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Chloride Diffusivity

scholarly journals Characterizing the 3D Pore Structure of Hardened Cement Paste with Synchrotron Microtomography

2008 ◽  
Vol 6 (2) ◽  
pp. 273-286 ◽  
Author(s):  
Michael Angelo B. Promentilla ◽  
Takafumi Sugiyama ◽  
Takashi Hitomi ◽  
Nobufumi Takeda
Keyword(s):  
Pore Structure ◽  
Cement Paste ◽  
Hardened Cement ◽  
Hardened Cement Paste ◽  
Synchrotron Microtomography
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