Abstract: This paper summarizes the recent progress of traditional MIP, method of synchrotron X-ray microCT (SX-microCT) and technique of NMR relaxation time, NMR cryoporometry on pore structure characterization in hardened cement pastes. First-hand information of pore structure, when calculating pore structure distribution from traditional MIP method, can be available directly without so many complex models or assumptions. Utilizing the advantage and combining with new reported porosimetry technology expect to realize new breakthrough of pore structure characterization in hardened cement paste. SX-microCT and NMR relaxation time could be better ways to characterize meso-pore structure within hardened cement paste, while NMR cryoporometry could characterize micro-pore structure. Whether NMR relaxation time or NMR cryoporometry, ferromagnetic materials existence in cement paste maybe have effect on NMR measurement precision. It needs further research in the future.

Key words: hardened cement pastes%MIP%synchrotron X-ray microCT%NMR%pore structure