STUDY ON THE EFFECT OF MINERAL ADMIXTURES ON AUTOGENOUS-SHRINAGE DEFORMATION OF CEMENT-BASED MATERIALS AND ITS MECHANISM
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摘要: 采用体积测量和长度测量相结合的试验手段,对高性能水泥基材料的自收缩变形规律进行了分阶段、全过程的研究分析,研究了矿物掺合料的种类(粉煤灰和磨细矿渣)、掺入比以及细度对自收缩的影响。结合毛细管张力理论,探讨了粉煤灰和磨细矿渣对自收缩的影响机理。Abstract: The whole-course of autogenous shrinkage deformation of high performance cement based materials was in vestigated by stages with the combining of volume measurement and length measurement.The effects of the type of mineral admixtures,including fly ash and ground blast furnace slag,addition rate and fineness on the autogenous shrinkage were studied.The mechanism was discussed on the basis of capillary tension theory.
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Ole Mejlhede Jensen,Per Freiesleben Hansen.Autogenous Deformation and RH-Change in Perspective.Cement and Concrete Research,2001,31:1 859-1 865 [2] Lura P.Autogenous Deformation and Internal Curing of Concrete:[Phd Thesis].of Uni.Delft 63-75 [3] Escalantea JI,Go'meza LY,Johalb KK,et al.Reactivity of Blast-Furnace Slag in Portland Cement Blends Hydrated under Different Conditions.Cement and Concrete Research,2001,31:1 403-1 409 [4] Hinrichs W,Odler I,Investigation of the Hydration of Portland Blast Furnace Slag Cement:Hydration Kinetics.Adv.Cem.Res.1989,2:9 -13 [5] Lam L,Wong Y L,Poon C S.Degree of Hydration and Gel/Space Ratio of High-Volume Fly Ash/Cement Systems.Cement and Concrete Research,2000,30:747-756 [6] Bentz D P.On the Mitigation of Early Age Cracking//Proc.3rd Int.Sem.on Self-Desiccation and Its Importance in Concrete Technology.Lund,195-204
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