Pore structure of blended cement paste by means of pressurization¿depressurization cycling mercury intrusion porosimetry

Pore structure of blended cement paste by means of pressurization¿depressurization cycling mercury intrusion porosimetry

Zhang, Y.
Wu, B.
Zhou, J.
Ye, G.
Shui, Z.

Civil Engineering and Geosciences

Structural Engineering

2014-05-26

Concrete containing supplementary cementitious materials (SCMs) has different durability properties from that containing pure Portland cement. The durability of concrete is always associated with the properties of microstructure, especially pore structure. Pressurization–Depressurization Cycling Mercury Intrusion Porosimetry (PDC-MIP) was recently developed which can overcome the “ink bottle” effect and provide a more accurate estimation of the pore size distribution in cement-based materials. In this study, the PDC-MIP was applied to characterize the evolution of pore structure of cement pastes blended with fly ash and/or limestone powder. The results revealed that as hydration proceeds the volume of gel pores (<0.01 um) increased while the volume of capillary pores (>0.05 um) decreased. The addition of fly ash increases the volume of gel pores (<0.01 um).

mercury porosimetry
pore size
supplementary cementitious materials

http://resolver.tudelft.nl/uuid:124a794f-2808-4317-b2e6-ccf281f544a0

DCMat Ageing Centre, Delft University of Technology

978-94-6186-314-0

AMS 14: Proceedings of the 1st Ageing of Materials & Structures Conference, Delft, The Netherlands, 26-28 May 2014

Institutional Repository

conference paper

(c) 2014 The Author(s)