In-situ Monitoring of Hydration Kinetics of Cement Pastes by Low-field NMR-中国期刊网

摘要 LowfieldNMRtechniquewasappliedtoinvestigatethehydrationofcementpasteswithdifferentwatertocementratiosoradditionofsuperplasticizer.Asanondestructivemethod,thistechniquecanbeusedtomonitorthehydrationkineticsprocessbyfollowingthechangesoflongitudinalrelaxationtime(T1)ofwaterconstrainedinthepastes.TheexperimentalresultsindicatethattheT1distributionsofwaterinthefreshpastenormallyexhibitebimodaldistribution,wherethelargepeakiscorrespondingtothefreewaterwhilethesmalloneiscontributedbythewaterstoredintheflocculations.TimedependenceoftheweightedaverageT1hasagoodagreementwiththehydrationprocessandcouldbedividedintofourstages,ie,initialperiod,dormantperiod,acceleratedperiodandsteadyperiod.Thehydrationmechanismofeachstagewasdescribedbasedonthetheoryofcementchemistry.Inaddition,thetotalsignalintensity,whichisproportionaltothecontentofthephysicallyboundwaterinthesamples,decreasesuccessivelyduringthehydrationreflectingtheconsumptionofphysicallyboundwaterbyhydrationreactions.

1LIU Jun;ZHANG Yun;LIU Runqing;ZHANG Bing. Effect of Fly Ash and Silica Fume on Hydration Rate of Cement Pastes and Strength of Mortars.材料科学与工程,2014-06.
2M. Rashid Shams Qamar Usmani Suhail Sabir. In-situ copolymerization of aniline with alkyl amine by APS： Kinetics and application.化学,2008-11.
3SU Lei MA Baoguo JIAN Shouwci ZHAO Zhiguang LIU Min. Hydration Heat Effeet of Cement Pastes Modified with Hydroxypropyl Methyl Cellulose Ether and Expanded PerHte.材料科学与工程,2013-01.
4LI Qiu. Chemical Composition and Mierostructure of Hydration Products of Hardened White Portland Cement Pastes Containing Admixtures.材料科学与工程,2015-04.
5Eugene Atiemo Kwabena Appiah Boakye James Sarfo-Ansah. Hydration and Mechanical Properties of Portland Cement Blended with Low-CaO Steel Slag.物理,2014-07.
6YingdanZHU ChangWANG JihuiWANG WeiHE GuoqiangGAO. Long-period Gratings in-situ Sensing for Flow Monitoring in Liquid Composite Molding.材料科学与工程,2005-02.
7WANG Xiao;MA Juntao;ZHANG Lei;YANG Jiujun. Radioactive Element Distribution Characteristics of Red Mud based Field Road Cement before and after Hydration.材料科学与工程,2018-02.
8Feng Yunxia;Chu Xiaoli;Xu Yupeng;Tian Songbai. Corresponding Factors Influencing Crude Oils Assay Using Low-field Nuclear Magnetic Resonance.油气加工工程,2014-02.
9S.A.Abo-El-Enein;E.El-Shimy;等. Hydrothermal Characteristics of Blended Cement Pastes Containing Silica Sand Using Cement Kiln Dust as an Activator.材料科学与工程,2002-05.
10马保国;欧志华. Influence of Cellulose Ethers on Hydration Products of Portland Cement.材料科学与工程,2011-03.

In-situ Monitoring of Hydration Kinetics of Cement Pastes by Low-field NMR

来源期刊

相关推荐

同分类资源更多

相关关键词

In-situ Monitoring of Hydration Kinetics of Cement Pastes by Low-field NMR

来源期刊

相关推荐

同分类资源 更多

相关关键词

同分类资源更多