influence of slag on cement hydration

influence of slag on cement hydration

The Influence of Slag on the Hydration of Cement – Cement ...

Jul 31, 2013 · aluminate phase: there is a filler effect using inert filler at about 12 hours of hydration, which shows slag can also has filler effect in the early hydration period. Transformation of AFt to AFm causes cumulative heat shoulder at about 60 hours. For all systems, slags did not have a strong influence on hydration of C3A phases.

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The influence of steel slag on the hydration of cement ...

高达12%返现 · Feb 02, 2011 · The results show that steel slag and cement affect each other’s hydration by changing the hydration environment. Steel slag does not react with the hydration products of cement. The dormant period of cement-steel slag complex binder during the hydration is longer than that of cement.

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Research of influence factors on hydration process of slag ...

【Abstract】 Hydration of slag-cement cementitious material was studied through the use of a mode TAM Air eight-channel isothermal conductive calorimeter that measured the hydration heat emission rate and quantity under different conditions.The three major processes of the Krstulovi-Dabic hydration kinetics model(NG:nucleation growth process,I:interface reaction

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Influence of Slag Chemistry on the Hydration of Alkali ...

As a result, at room temperature, the hydration reactivity of slag affects the formation and amount of hydration products. Therefore, in previous studies,

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Influence of slag chemistry on the hydration of alkali ...

Sep 01, 2011 · Increasing the MgO content of the slag from 8 to 13% increased the amount of hydrotalcite and lowered the Al uptake by C–S–H resulting in 9% higher volume of the hydrates and a 50 to 80% increase of the compressive strength after

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Influence of limestone on the hydration of ternary slag ...

In this regard, Lothenbach et al. (2008) and Adu-Amankwah et al. (2017) investigated the hydration kinetics of cement pastes containing different

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Influence of limestone on the hydration of ternary slag ...

Oct 01, 2017 · The impact of calcium carbonate on the hydration of ternary slag-limestone cement is the focus of the present study. A multi-technique approach was applied to study hydration. A PONKCS phase for GGBS was introduced in the Rietveld refinement of X-ray diffraction data (XRD) obtained from freshly ground samples without hydration stopping.

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The Influence of Slag on the Hydration of Cement – Cement ...

Jul 31, 2013 · The Influence of Slag on the Hydration of Cement. These following conclusions are summarized from the work of Kocaba’s PhD thesis. alite: no influence is shown on the consumption of alite measured by XRD. belite: the substitution of cement by both slags seems to result in a delay in the hydration of belite in the first days.

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The influence of steel slag on the hydration of cement ...

Feb 02, 2011 · The influence of steel slag, a by-product from the processing of iron to steel, on the hydration of cement during the hydration process of complex binder was studied by calorimetry, X-ray diffraction analysis, and Ca(OH) 2 content determination. The results show that steel slag and cement affect each other’s hydration by changing the hydration environment.

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Influence of Slag Chemistry on the Hydration of Alkali ...

Influence of Slag Chemistry on the Hydration of Alkali-Activated Blast-Furnace Slag - Part I: Effect of MgO September 2011 Cement and Concrete Research 41(9):955-963

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HYDRATION FEATURES OF NEW PHOSPHOROUS SLAG CEMENT

Abstract: As a new construction material, phosphorous slag cement has been made in batch production. Differing from ordinary slag cement, a kind of mineral (CNS) mainly containing Na 2 SO 4 is used in the cement as a retarder instead of gypsum. Because of the influence of CNS and phosphor, there must be some difference in hydration process between phosphorous

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Pozzolanic Effect on the Hydration Heat of Cements ...

Oct 08, 2021 · The hydration heat at the 160th hour was 278.9 J/g, the hydration heat at the 41st hour was 120 J/g, and the heat at the 160th hour was 233.7 J/g in the 50% obsidian-added cement ground for 45 min. Based on the measurement according to TS EN 196-9, as the rate of obsidian added to cement increased, hydration temperatures decreased.

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Mechanical properties of reactive powder concrete ...

Sep 01, 2010 · The hydration of the cement in pastes containing slag was first retarded and then enhanced at some later age. Secondary materials form additional hydration products. This effect was shown by the additional combined water per unit mass of Portland cement in the blended mixtures and by the depletion of calcium hydroxide [18] .

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Chloride binding of alkali-activated slag/fly ash cements ...

Nov 30, 2019 · Abstract In this study, the effects of slag/fly ash ratio, Na2O concentration, silicate modulus of activators and water/binder ratio on chloride binding of alkali-activated slag/fly ash cements (AACs) are studied, using the binding isotherms. The Langmuir isotherm suits better for chloride adsorption of most of AACs, and the amount of bound chloride is predominantly

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Influence of natural Pozzolan and blast furnace slag on ...

Influence of natural Pozzolan and blast furnace slag on hydration and physico-mechanical properties of cement. / Lakri, Meriem; Saidani-Scott, Hind. In: International Journal of sustainable building technology and urban development, Vol. 10, 3, 30.09.2019, p. 112-124.

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Application of Isothermal and Isoperibolic Calorimetry to ...

This work deals with the influence of zinc on cement hydration. The amount of zinc in cement has increased over recent years. This is mainly due to the utilization of solid waste and tires, which are widely used as a fuel in a rotary kiln. Zinc can also be introduced to cement through such secondary

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Crystals | Free Full-Text | Effects of Fluorogypsum and ...

In order to explore the influence of the types of waste gypsum on the properties of alkali slag cement, fluorogypsum (FG) and flue-gas desulfurization (FGD) gypsum were comparatively investigated. Moreover, the action mechanisms of FG and FGD gypsum on the properties of alkali slag cement were analyzed. The results show that both the FG and FGD gypsum prolonged

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[PDF] Combinations Of Pozzolans And Ground Granulated ...

Feb 04, 2013 · Hydraulic cement concretes were produced using pozzolans and ground, granulated, blast-furnace slag (slag) to investigate the effect of these materials on durability. The pozzolans used were an ASTM C 618 Class F fly ash with a low lime content and a dry, densified silica fume. The slag was an ASTM C 989 Grade 120 material.

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Concrete - Wikipedia

Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined.

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Influence of slag composition and temperature on the ...

21 basic slag had higher strengths and greater degrees of hydration especially at the high 22 temperature. The results showed that temperature had a much greater influence on 23 the reactivity of the slags than the difference in chemical composition. 24 Keywords: GGBS, slag composition, temperature, hydration, microstructure, slag 25 blends

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Influence of natural Pozzolan and blast furnace slag on ...

Influence of natural Pozzolan and blast furnace slag on hydration and physico-mechanical properties of cement. / Lakri, Meriem; Saidani-Scott, Hind. In: International Journal of sustainable building technology and urban development, Vol. 10, 3, 30.09.2019, p. 112-124.

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EFFECTS OF FINENESS AND CONTENT OF PHOSPHORUS SLAG

The utilization of phosphorus slag (PHS) to replace the fly ash in the construction of hydraulic projects has attracted a growing attention in China. In this study, the influence of PHS fineness and content on cement hydration, mechanical strength, permeability as well as the pore structure and fractal dimension (D s) of concrete have been ...

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HYDRATION FEATURES OF NEW PHOSPHOROUS SLAG CEMENT

Abstract: As a new construction material, phosphorous slag cement has been made in batch production. Differing from ordinary slag cement, a kind of mineral (CNS) mainly containing Na 2 SO 4 is used in the cement as a retarder instead of gypsum. Because of the influence of CNS and phosphor, there must be some difference in hydration process between phosphorous

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Materials | Free Full-Text | Influence of Phosphorus Slag ...

Many researchers have tried to enhance phosphorus slag by the alkaline activation. The modulus of water glass has great influences on early hydration and compressive strength of alkali-activated phosphorus slag cement . The blended activator of water glass and NaOH is also recommended to be used for phosphorus slag .

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Influence of initial alkalinity on the hydration of steel slag

The influences of different alkaline conditions on the kinds and morphologies of steel slag’s hydration products, Ca(OH)2 content of hydration products, pore

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Influence of hydrothermal curing regimes on the hydration ...

Jan 20, 2013 · Mohamed et al. have investigated the influence of different curing temperatures on the physico-mechanical properties of calcium aluminate cement with the addition of air-cooled slag and water-cooled slag. At higher temperature, compressive strength increases with increasing content of slag though after longer time of hydration.

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Chloride binding of alkali-activated slag/fly ash cements ...

Nov 30, 2019 · Abstract In this study, the effects of slag/fly ash ratio, Na2O concentration, silicate modulus of activators and water/binder ratio on chloride binding of alkali-activated slag/fly ash cements (AACs) are studied, using the binding isotherms. The Langmuir isotherm suits better for chloride adsorption of most of AACs, and the amount of bound chloride is predominantly

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Mechanical properties of reactive powder concrete ...

Sep 01, 2010 · The hydration of the cement in pastes containing slag was first retarded and then enhanced at some later age. Secondary materials form additional hydration products. This effect was shown by the additional combined water per unit mass of Portland cement in the blended mixtures and by the depletion of calcium hydroxide [18] .

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Influence Mechanism of Chemical Excitation on Compressive ...

The microscopic characteristics showed that the hydration degree of the samples was deepened, which was helpful to the formation of hydration products such as ettringite and gel, and improved the strength of the samples. This provided a theoretical basis for the application of coal gasification slag in cement-based materials. More Reset

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Preparation of durable magnesium oxysulfate cement with ...

However, the spontaneous hydration of blast furnace slag manifested a competition against magnesia cement hydration and resulted in strength

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Regulating Effect of Cement Accelerator on High Content ...

Feb 08, 2021 · Finally, the influence of various cement coagulants on slurry performance, physical-mechanical properties and hydration products was discussed and analyzed. The results of this paper can provide theoretical and technological guidance for the slurry foaming and rough-body thickening process modification of carbide slag HCS-AAC.

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Influence of limestone on the hydration of ternary slag ...

Oct 15, 2017 · The U.S. Department of Energy's Office of Scientific and Technical Information

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Regulating Effect of Cement Accelerator on High Content ...

Meanwhile, the affiliated effects on the physical-mechanical properties and hydration products were discussed to evaluate the applicability and influence of the cement accelerator. The hydration products were characterized by mineralogical (XRD) and thermal analysis (DSC-TG). The results indicated that substituting carbide slag for quicklime ...

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