CAJ | 학술논문

分别概述了压汞测孔法、同步加速X射线层析扫描测孔法、核磁共振弛豫时间测孔法和核磁共振冷冻干燥测孔法.压汞测孔法能直接获取硬化水泥浆体孔结构第一手信息,孔隙结构换算时无需大量、复杂的模型和假定.利用此特点,结合新报道的测孔技术有望实现硬化水泥浆体孔结构表征技术的新突破;同步加速X射线层析扫描测孔法和核磁共振弛豫时间测孔法适合于表征介观尺度的孔隙结构,而核磁共振冷冻干燥法适合于表征微观尺度的孔隙结构.无论是核磁共振弛豫时间测孔法还是核磁共振冷冻干燥测孔法,水泥浆体中铁磁性物质的存在可能会对测定精度产生影响,需要进一步研究.
분별개술료압홍측공법、동보가속X사선층석소묘측공법、핵자공진이예시간측공법화핵자공진냉동간조측공법.압홍측공법능직접획취경화수니장체공결구제일수신식,공극결구환산시무수대량、복잡적모형화가정.이용차특점,결합신보도적측공기술유망실현경화수니장체공결구표정기술적신돌파;동보가속X사선층석소묘측공법화핵자공진이예시간측공법괄합우표정개관척도적공극결구,이핵자공진냉동간조법괄합우표정미관척도적공극결구.무론시핵자공진이예시간측공법환시핵자공진냉동간조측공법,수니장체중철자성물질적존재가능회대측정정도산생영향,수요진일보연구.
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.