gypsum and lim cement in farsi

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  Long-term evolution of delayed ettringite and gypsum in Portland cement ...

  200921 · The magnitude evolution of ettringite and gypsum in hydrated Portland cement mortars due to sulfate attack was detected by X-ray powder diffraction. T…

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  Optimization of gypsum and slag contents in blended cement …

  202091 · The blended cement with less than 60% slag content was beyond the scope of this study, therefore the amounts of slag ranged from 60 to 100%, both of the corresponding gypsum and clinker content ranged from zero to 40%. The ternary system in Fig. 1 shows the proportions of the slag, gypsum and clinker of all 31 samples.

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  Gypsum in Cement - ScienceDirect

  198311 · Gypsum conditions, even the long-term characteristics of concrete stone, characteristics which, being determined by a complexity of phenomena which develop with time, are notably affected by the structures which develop in the initial stage, when the cement compounds react with calcium sulfate.

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  Gypsum of improved performance using blends with Portland cement …

  1994623 · The present work describes a study intended to develop a blend of gypsum and Portland cement that would possess the advantages of gypsum (high early strength and enhanced workability) and Portland cement (improved durability in moist conditions), but would be free of the deleterious effect of ettringite, which is formed when gypsum and …

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  Thermal treatment and utilization of flue gas desulphurization gypsum ...

  200871 · In this paper, the possibility of flue gas desulphurization (FGD) gypsum as an admixture in cement and concrete was explored. The gypsum was baked at the proper temperature of 200 °C for 60 min and then mixed into slag powder forming Compound-slag in which SO 3 content was controlled at the optimum ratio of 3.5%. Performances of …

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  Mineralogical study of high SO3 clinker produced using waste gypsum ...

  2019830 · Portland-cement clinker with a SO3 content up to 3.4% was produced in a cement kiln using waste gypsum board, and the influence of SO3 content on the …

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  Examining the use of Lime and Gypsum in GGBS based alkali …

  2023519 · The experimental program consists of casting and testing the GGBS (GG), MK, Lime and Gypsum based alkali activated concrete at its paste state and mortar state. GGBS content in the binder medium was kept constant as 75%. This is because GGBS is the main strength contributor in the matrix.

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  Cement and Concrete Research - ScienceDirect

  202411 · This research sheds light on the two origins of C3A hydration in structural build-up of cement paste. The largest critical strain is associated with c…

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