The hydration of slag blended cement is studied by considering the interaction between the hydrations of slag and Portland cement clinker Three reaction models for the slag blended cement are developed based on stoichiometric calculations These models correlate the compositions of the unhydrated slag blended cement with the quantities and compositions of
This study aims to improve the mechanical properties of cement steel slag mortar by the addition of alkaline activators NaOH Na 2 CO 3 /NaOH and water glass to promote the optimal utilization of steel slag In this paper the setting time flexural and compressive strength early age hydration kinetics and microstructure are investigated to
Cement phosphorous slag PS and steel slag SS were used to prepare low carbon cementitious materials and triisopropanolamine TIPA was used to improve the mechanical properties by
Carbonation curing can accelerate the early hydration rate of steel slag cement and enhance the degree of hydration in the later stages [125] Furthermore carbonation produces more hydration products that fill the gaps between cement particles and form flocculent structures created by hydration products In addition the influence of
In this study the fresh state and hydration properties of 0 60% lithium slag blended cement pastes were investigated at water binder ratio of The workability of the fresh pastes was evaluated by measuring the air content marsh cone flow mini slump flow setting times and through rheology tests A 40% lithium slag cement could produce 91% strength
Alkali Activated Slag Cement AASC activated by weak alkaline components has good workability and safety Sodium carbonate Na 2 CO 3 SC sodium sulfate Na 2 SO 4 SS reactive magnesium oxide R MgO and calcium hydroxide Ca OH 2 CH were used to prepare the hydration process phase composition and hydration kinetics of AASC
The hydration of ternary blended cements comprising Portland cement metakaolin and blast furnace slag was studied at different temperatures of 30 40 50 and 60 °C by isothermal calorimetry Phase composition of hydration products was determined by thermal analysis and X ray diffraction for sample hydrated at 60 °C Hydration involves different
This study examines the use of natural seawater as mixing water for alkali activated slag concrete and reports the characteristics of alkali activated slag concrete with exposure to seawater Preliminary experiments were conducted on pastes in order to measure pH and select optimum activator content under the experimental conditions Wet sieved pastes
Synergistic effects of the synthetic calcium silicate hydrates C S H /polycarboxylate PCE and Na2SO4 on hydration properties and microstructure of cement lithium slag LS composite binder were analyzed Results showed that C S Hs PCE and Na2SO4 exhibited a synergistic effect on hydration acceleration of LS cement binder Na2SO4
Table 1 shows the components of the slag and CSA used herein through the XRF analysis Table 2 shows the mineral composition of type K CSA expansive agent The components of brine are shown in Table 3 through ICP OES The CSA is a type K expansive cement material in the classification of ACI 223R 10 [60] From previous studies using the
F fly ash and GGBF Slag on the heat of hydration of concrete Based on semi adiabatic calorimeter tests a heat of hydration model is presented to quantify the
In this paper the effects of the proportions of SSC slag calcium sulfate and alkali activator contents were studied for two slags with different chemical compositions mainly the Al 2 O 3 content The results showed the slag characteristics and the alkaline activator content played a very important role in the process of hydration
The Influence of the Acceleration Admixture Type and Composition of Cement on Hydration Heat and Setting Time of Slag Blended Cement April 2022; Materials 15 8
Table 6 shows the degree of slag hydration as determined by BSE SEM image analysis of 7 and 28 day old paste samples cured at 20 and 38 °C The results followed the same trend as the calorimetry and XRD Fig 5 Fig 6 where it was seen that the higher temperature increased the rate of slag hydration The higher temperature resulted in an
F fly ash and GGBF Slag on the heat of hydration of concrete Based on semi adiabatic calorimeter tests a heat of hydration model is presented to quantify the
The activation of GGBFS by sulphates was first described by Kühl in 1909 [1] Generally the super sulphated cements SSC consist of 80 85 wt % of slag with 10 15 wt % of anhydrite and an alkaline activator often Portland cement clinker [2] The main hydration products are ettringite and C S H [3] [4] SSC shows an increased resistance to sulphate
This paper reports the physical properties and hydration products of slag cement that was prepared by activating ground granulated blast furnace slag with commercial lime and plaster of Paris POP as activators The consistency setting times and soundness of various mixes of slag lime POP is reported The hydration products and formation of bonds in the
The results of the thermogravimetric analysis are consistent with the XRD analysis regarding the types of hydration products of cement and slag cement composite gel materials
Similar to ordinary Portland cement steel slag contains mineral phases including dicalcium silicate C 2 S dicalcium Influence of steel slag powder on the characteristics of magnesium phosphate Inhibition mechanisms of steel slag on the early age hydration of cement Cement Concr Res 140 2021 /
The results suggest that slag and blend reactivity is clearly influenced by the level of replacement in the system; at low slag levels the hydration of the system is reduced resulting in a significant drop in strength however at higher slag to Portland cement ratios slag seems to be more effectively activated resulting in increased strength
As hydration progressed the cumulative heat of hydration for CS4W3 and CS4W4 became lower than that of CS4W0 while the cumulative heat for CS4W1 and CS4W2 remained similar to that of CS4W0 This observation suggests that incorporating an optimal amount of WAP can enhance the early hydration of slag cement blended pastes
Request PDF On Sep 1 2024 Yu Xiang and others published Influence law and control mechanism of manufactured sand particles derived from tunnel slag on cement hydration Find read and cite
The impact of C S H seeding on the hydration of slag blended cement was systematically investigated trying to understand and explore the potential of C S H seeding in blended cement
© Copyright 2024 By Ore Crushing Equipment Manufacturer
