A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Changes in pore structure and mercury contact angle of hardened cement paste depending on relative humidity
Abstract Hardened cement paste (hcp) is a porous heterogeneous material consisting of dispersed particles like Calcium Silicate Hydrates (C-S-H). These are of micron to nanometer size forming pores on a nanometer scale. Thus, hcp can be regarded as a colloidal system. Surface forces play a dominant role. Adsorbed water molecules interact with the surface. Capillary condensation occurs in the pores below bulk conditions acting in form of capillary and disjoning forces. All these forces are able to alter the structure and properties of the hardened cement paste depending on the moisture content. Pore size distributions were measured with mercury intrusion porosimetry on hcp specimens, which had been prestored over the entire range of relative humidity. Swelling and shrinkage of hcp tubes were also determined. The pore size distribution is corrected for each humidity step regarding the particular porosity, contact angle and volume change. The pore size distribution as a function of relative humidity is nonlinear and characterized by an extreme value in the medium range of humidity.
Changes in pore structure and mercury contact angle of hardened cement paste depending on relative humidity
Abstract Hardened cement paste (hcp) is a porous heterogeneous material consisting of dispersed particles like Calcium Silicate Hydrates (C-S-H). These are of micron to nanometer size forming pores on a nanometer scale. Thus, hcp can be regarded as a colloidal system. Surface forces play a dominant role. Adsorbed water molecules interact with the surface. Capillary condensation occurs in the pores below bulk conditions acting in form of capillary and disjoning forces. All these forces are able to alter the structure and properties of the hardened cement paste depending on the moisture content. Pore size distributions were measured with mercury intrusion porosimetry on hcp specimens, which had been prestored over the entire range of relative humidity. Swelling and shrinkage of hcp tubes were also determined. The pore size distribution is corrected for each humidity step regarding the particular porosity, contact angle and volume change. The pore size distribution as a function of relative humidity is nonlinear and characterized by an extreme value in the medium range of humidity.
Changes in pore structure and mercury contact angle of hardened cement paste depending on relative humidity
Adolphs, J. (author) / Setzer, M. J. (author) / Heine, P. (author)
2002
Article (Journal)
English
| British Library Online Contents | 2002
Surface energies of hardened cement paste depending on relative humidity
| British Library Conference Proceedings | 2005
Surface energies of hardened cement paste depending on relative humidity
| British Library Online Contents | 2005