Influence of Water‐Cement Ratio and Type of Mixing Water on the Early Hydration Performance of Calcium Sulphoaluminate (CSA) Cement

Wang, Chuanlin; Song, Meimei

doi:10.1155/2021/5557763

Cited by 12 publications

(8 citation statements)

References 32 publications

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“…On the other hand, the effect of the w/c ratio on early hydration has been thoroughly tested, and findings are similar across different research. An increased reaction rate of mortars with CSA and high w/c ratio was shown by research by Wang and Song [ 32 ], Gołaszewska et al [ 33 ], and Doval [ 30 ]. For Tang et al [ 34 , 35 , 36 ], the research results indicated an increase in the heat rate of CSA cements with a higher w/c ratio and, consequently, an increase in the temperature of the samples with increased water content.…”

Section: Introductionmentioning

confidence: 94%

“…Additionally, porosity has been found to increase with the increase in the w/c ratio of CSA mortars, which provides possible grounds for the decrease in compressive strength of CSA mortars [ 34 ]. On the other hand, Wang and Song [ 32 ] have found that mortars with a w/c ratio below 0.4 can exhibit decreases in compressive strength if cured in water for more than 7 days, while samples with a w/c ratio of 0.48 did not exhibit similar behavior, providing evidence of a possible positive effect on compressive strength.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of the effect of w/c ratio on shrinkage, an increase in the w/c ratio in the range of 0.32–0.48 was linked to an increase in the chemical shrinkage of mortars with CSA cement [ 32 ]. It should be noted, however, that the information about the effect of the w/c ratio on different forms of shrinkage is very limited.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Water to Cement Ratio on Properties of Calcium Sulfoaluminate Cement Mortars

Gołaszewska,

Gołaszewski,

Chmiela

2024

Materials

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Calcium sulfoaluminate (CSA) cements are a promising alternative to Portland clinker, however, a thorough understanding of their properties is needed for their broader use in the industry. One of the topics that requires a good understanding is the effect of the w/c ratio on the properties of CSA cements. To this end, the aim of this paper was to provide research into the effects of a w/c ratio in the range of 0.45–0.6 on the properties of fresh and hardened CSA pastes and mortars. For fresh mortars, consistency and setting time, as well as plastic shrinkage tests, were conducted, and were complemented by hydration heat tests, carried out on pastes. For hardened mortars, tests of compressive and flexural strength and dry shrinkage, as well as SEM photography, were conducted. It was found that, regardless of a higher hydration rate, the increase in w/c ratio decreased flexural and compressive strength, as well as shrinkage, while increasing consistency, setting time, and hydration heat. Also observed was a significant decrease in strength between 3 and 7 days of curing in mortars with a high w/c ratio. It can be concluded that, regardless of the hydration rate, low w/c ratios in CSA mortars provide better properties than high w/c ratios.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Effect of Water to Cement Ratio on Properties of Calcium Sulfoaluminate Cement Mortars

Gołaszewska,

Gołaszewski,

Chmiela

2024

Materials

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“…As can be seen in Figure 1 , the rapid hardening of the cement can advance the strength-development time. Type Ⅲ rapid-hardening Portland cement, which exhibits a high early strength and hydration heat compared to ordinary Portland cement (OPC), can be an effective solution for the delay in the formwork striking time of concrete poured at low temperatures [ 19 , 20 , 21 , 22 ]. However, as rapid-hardening cement is expensive and, thus, economically disadvantageous, it is rarely reflected in designs.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Verification of Concrete Formwork-Striking-Time Reduction by High Blaine Ordinary Portland Cement

Kim

Shin

2023

Materials

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Type Ⅰ high Blaine ordinary Portland cement (IHB) possesses the same composition as that of type Ⅰ ordinary Portland cement; however, due to its high fineness, IHB exhibits properties that are similar to those of type Ⅲ rapid-hardening Portland cement, which can reduce the formwork striking time. However, to date, no quantitative research results regarding the construction-time-reduction effect of IHB have been reported. Therefore, this study conducted experiments to verify the formwork-striking-time reduction effect of concrete using IHB. Considering seasonal changes, the strength-development characteristics, according to the outside air temperature, were examined by modifying the curing temperature conditions (5, 10, and 20 °C). Furthermore, the achievable reduction in the concrete formwork striking time was quantitatively determined by comparing and analyzing with the linear interpolation and maturity methods for improving the accuracy of the formwork striking time. The experimental results indicated that, compared with ordinary cement, early formwork striking is possible using IHB, due to earlier strength development. Thus, IHB was confirmed to be effective for construction-time reduction through early formwork striking, and it can be used as a sufficient substitute for expensive rapid-hardening cement in sites and weather conditions where rapid hardening is required.

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“…In order to solve the volume shrinkage of conventional cement, researchers have developed a series of oil well cement expansion agents such as MgO, gypsum lattice expansion agent and sulphoaluminate (CSA) expansion agent (Mo et al, 2010;Moradpour et al, 2013;Corinaldesi et al, 2015). Among them, CSA cement demonstrates great potential in improving the shrinkage properties of oil well cement (Chen et al, 2012;Hargis et al, 2019;Mark et al, 2021), furthermore it is also beneficial for improving strength development of cement (Wang and Song, 2021). However, the effect of CSA expansion agent on the creep properties of oil well cement remains unknown and this needs further investigation.…”

Section: Introductionmentioning

confidence: 99%

Influence of different additives on the creep property of oil well cement

Song

Gao²,

Zhang³

2022

Front. Built Environ.

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As the exploitation of oil and gas field becomes more difficulty nowadays, severe casing deformation may occur if anti-extrusion strength of casing decreases to a certain degree and this brings large economic loss and severe safety problems. As an annular sheath between casing and formation, creep of oil well cement paste is one of the most important factors in deciding abnormal casing deformation and wellbore integrity. To figure out the mechanism on how to reduce the creep value of oil well cement paste, effect of different additives, e.g., retarder, glass fibre reinforcement and CSA expansive agent on the creep value of oil well cement are investigated in this study. It can be found out that retarder plays a negative role in reducing the creep deformation and creep value of cement with 1, 2, 3% retarder is 2.39%, 7.85%, and 15.02% higher than that without retarder at 12 h. Results from heat flow indicates that retarder may play an important role in prolonging the early induction period of hydration and reducing the hydration rate in the middle and later stages. On the contrary, Glass fibre shows a positive effect in reducing the creep value of oil well cement paste and creep value reaches with 0.2%, 0.4%, 0.6%, and 0.8% is 1.27%, 6.61%, 9.82%, and 12.60% lower than that without fibre addition at 72 h. This is because high porosity between and around fibers based on a microstructure observation may lead to a more continuous and uniform stress field between cement paste, and consequently reduce the creep value of cement paste. It can also be found out that CSA cement is considerably effective in limiting creep deformation of oil well cement paste at early ages. There is also an acceleration effect on the heat flow of oil well cement in both induction and acceleration periods and the corresponding maximum heat flow is 7.3%, 9.0%, and 11.2% higher than the reference cement with no CSA addition. The results obtained in this study are aimed to provide theoretical basis for the wellbore integrity and improvement of oil and gas recovery.

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Influence of Water‐Cement Ratio and Type of Mixing Water on the Early Hydration Performance of Calcium Sulphoaluminate (CSA) Cement

Cited by 12 publications

References 32 publications

Effect of Water to Cement Ratio on Properties of Calcium Sulfoaluminate Cement Mortars

Effect of Water to Cement Ratio on Properties of Calcium Sulfoaluminate Cement Mortars

Quantitative Verification of Concrete Formwork-Striking-Time Reduction by High Blaine Ordinary Portland Cement

Influence of different additives on the creep property of oil well cement

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