The difference among the effects of high-temperature curing on the early hydration properties of different cementitious systems

Wang, Qiang; Li, Mengyuan; Jiang, Guohua

doi:10.1007/s10973-014-3979-9

Cited by 21 publications

(5 citation statements)

References 14 publications

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“…That explains why the sorptivity coefficient of cement mixed with slag is half that of pure cement. In contrast, the content of hydration products of cement mixed with fly ash is lower due to the poor reactivity of fly ash [36] , which leads to showing a higher water absorption and low impermeability in the capillary water absorption test. However, research has shown that the sorptivity coefficient of cement blended with fly ash continues to decrease with the prolongation of curing time and the development of the pozzolanic reaction [37] .…”

Section: Influence Of Curing Methods On Water Absorption Of Cover Con...mentioning

confidence: 98%

Effects of Curing Methods on the Permeability and Mechanism of Cover Concrete

Wang¹,

Guo

et al. 2023

Jour. of build. mater. Sci.

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Curing methods are one of the most important factors in determining the quality and compactness of cover concrete. The effect of curing methods on the water absorption and sorptivity coefficient of cover concrete with the substitution ratio of fly ash (FA) and ground granulated blast slag (GGBS) for cement between 30 and 40 wt % was studied by capillary water absorption test. The vacuum saturation test and mercury intrusion test were employed to characterize these differences in the pore structure of cover concrete under different curing methods. With further analysis of the compactness of microstructure by SEM, the mechanism of the impact of curing methods on the permeability of cover concrete was revealed. The results obtained indicate that the effect of curing methods on the water absorption, sorptivity coefficient and porosity of cover concrete shows the trend of natural curing > cover curing > water curing > standard curing. It is also shown that reasonable curing is advantageous to reduce the porosity and permeability of cover concrete. In natural curing conditions, the appearance of porosity increasing and pore structure coarsening is more critical for cover concrete with mineral admixtures than for pure cement concrete. Therefore, the permeability of cover concrete with mineral admixtures is more sensitive to the early-age curing methods.

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Section: Influence Of Curing Methods On Water Absorption Of Cover Con...mentioning

confidence: 98%

Effects of Curing Methods on the Permeability and Mechanism of Cover Concrete

Wang¹,

Guo

et al. 2023

Jour. of build. mater. Sci.

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“…This is more pronounced for the GGBS, which is more sensitive to high temperatures than other mineral admixtures and cement. Additionally, the hydration degrees of the GGBS and steel slag increase dramatically at higher temperatures [18][19][20]. Additionally, the hydration heat of the GGBS is so large that the hydration heat of the binder containing 17-40% fine GGBS is greater than that of plain cement at room temperature, and the hydration heat of the binder containing 30-50% GGBS is close to or even higher than that of plain cement at 60 ∘ C [20,21].…”

Section: Hydration Heat and Adiabatic Temperature Rise Figures 2(a) mentioning

confidence: 99%

Application of Ground Granulate Blast Furnace Slag-Steel Slag Composite Binder in a Massive Concrete Structure under Severe Sulphate Attack

Jin

Wang

2017

Advances in Materials Science and Engineering

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A composite mineral binder was prepared by mixing ground granulate blast furnace slag (GGBS) and steel slag (GGBS/steel slag ratios are 1 : 1 or 3 : 2 by mass). The application of a composite binder in a massive concrete structure under severe sulphate attack is discussed by determining the hydration heat, adiabatic temperature increase, compressive strength, elastic modulus, chloride ion permeability, and sulphate attack resistance. The results show that the hydration heat of the composite binder decreases greatly when the cement replacement ratio increases to 50% at 45 ∘ C. The adiabatic temperature rise of the concrete containing the composite mineral admixture decreases significantly. Concrete containing the composite mineral admixture has a lower early elastic modulus and satisfactory late-age compressive strength. The composite mineral admixture can improve the resistance to chloride ion permeability and sulphate attack resistance of concrete, especially during temperature match curing.

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“…Correspondingly, the concrete containing mineral admixtures usually achieves a lower early strength compared with the plain cement concrete [33,34]. However, the hydration degree of mineral admixtures increases significantly with the increase of curing temperature and steam curing time at early ages, which contributes to the strength development of concrete [35][36][37][38]. Therefore, steam curing is an effective method to improve the strength of concrete containing mineral admixtures at early ages [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

The Role of Phosphorus Slag in Steam-Cured Concrete

Liu

Wang

2017

Advances in Materials Science and Engineering

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Steam curing is an effective method to increase the hydration degree of binder containing phosphorus slag. The role of phosphorus slag in steam-cured concrete was investigated by determining the hydration heat, hydration products, nonevaporable water content, pore structure of paste, and the compressive strength and chloride ion permeability of concrete. The results show that elevated steam curing temperature does not lead to new crystalline hydration products of the composite binder containing phosphorus slag. Elevating steam curing temperature enhances the early hydration heat and nonevaporable water content of the binder containing phosphorus slag more significantly than increasing steam curing time, and it also results in higher late-age hydration degree and finer pore structure. For steam-cured concrete containing phosphorus slag, elevating curing temperature from 60°C to 80°C tends to decrease the late-age strength and increase the chloride permeability. However, at constant curing temperature of 60°C, the steam-cured concrete containing phosphorus slag can achieve satisfied demoulding strength and late-age strength and chloride permeability by extending the steam curing duration.

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The difference among the effects of high-temperature curing on the early hydration properties of different cementitious systems

Cited by 21 publications

References 14 publications

Effects of Curing Methods on the Permeability and Mechanism of Cover Concrete

Effects of Curing Methods on the Permeability and Mechanism of Cover Concrete

Application of Ground Granulate Blast Furnace Slag-Steel Slag Composite Binder in a Massive Concrete Structure under Severe Sulphate Attack

The Role of Phosphorus Slag in Steam-Cured Concrete

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