Ultrasonic measurements during early-stage hydration of ordinary Portland cement

Kim, H. C.; Yoon, Sukhwan

doi:10.1007/bf01174694

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…During the first few minutes of the hydration reaction, alkali ions and Ca 2+ ions are rapidly released from the cement particles. SF particles adsorb calcium ions on the surface and reduce the concentration of Ca 2+ in the pore solution, boosting the dissolution of C 3 S and accelerating the hydration reaction [ 33 ]. After the induction ends, the cement particles are covered with hydration products, and the hydration reaction gradually slows.…”

Section: Resultsmentioning

confidence: 99%

Correlation between the Compressive Strength and Ultrasonic Pulse Velocity of Cement Mortars Blended with Silica Fume: An Analysis of Microstructure and Hydration Kinetics

Hong

Choi

et al. 2021

Materials

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The effect of the replacement rate of silica fume (SF) on the correlation between the compressive strength and ultrasonic pulse velocity (UPV) of cement mortar was experimentally analyzed. Specimens were fabricated with different replacement rates of SF, the compressive strength and UPV were measured, and isothermal calorimetry and mercury intrusion porosimetry tests were conducted to analyze the effects of replacement on the hydration kinetics and microstructures on these properties. Field emission scanning electron microscopy analysis was performed to observe SF particles and microstructure. The substitution of SF changed the cement mortar’s hydration kinetics and microstructures, resulting in different strengths and UPVs depending on the replacement rate. The compressive strength and UPV for cement mortars blended with SF also showed a different exponential relationship depending on the SF replacement rate.

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Section: Resultsmentioning

confidence: 99%

Correlation between the Compressive Strength and Ultrasonic Pulse Velocity of Cement Mortars Blended with Silica Fume: An Analysis of Microstructure and Hydration Kinetics

Hong

Choi

et al. 2021

Materials

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“…Subsequently, this method was found to be suitable for studying the hydration of cement paste in the oil industry [12,13]. Previous studies indicated that a high solid concentration causes less wave attenuation [14]. Besides, the bubble content [15], moisture content, porosity, and permeability [16] are essential factors that are attenuating the ultrasonic parameters.…”

Section: Introductionmentioning

confidence: 99%

Detection Technology of Foamed Mixture Lightweight Soil Embankment Based on Ultrasonic Wave Transmission Method

Hong

Liu

et al. 2019

Advances in Materials Science and Engineering

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This study attempted to establish a process that uses the ultrasonic wave transmission method to correlate the ultrasonic parameters with the material properties of Foamed Mixture Lightweight Soil (FMLS). The results were then applied for the defect detection of the FMLS embankment. First, the ultrasonic wave velocity (UPV) and amplitude (UPA) of FMLS with different mix proportions were collected continuously from 3rd day to 45th day in the curing age. The relationships between UPV versus FMLS elastic modulus, unconfined compressive strength, and density were calibrated. The variations in the ultrasonic parameters owing to the test distance and crack width were recorded. Then, the laboratory tests were reproduced through numerical simulation approach. Finally, the reliability and accuracy of the proposed detection method for FMLS were proved and validated through on-site tests. The proposed methodology, which is simple, stable, and reliable, was found to be suitable for the quality diagnosis of FMLS embankments after construction and during operation.

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“…The term setting in concrete have been described the onset of good rigidity in the various stage were involved in cement pastes, cement/binder mortar and fresh concrete and also linear relationship has compared between the degree of heat of hydration and concrete strength. The NDT method used for various specimens to monitor the pulse for hardened smooth surface of concrete consisting of low water-binder material ratio 0.4 to 0.6 was analyzed and identified the setting rate was higher at lower w/b ratio content in the cementitious systems [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effects of Calcium Nitrate in Sugar Cane Bagasse Ash and Partial Replacement of Fine Aggregate by Stone Dust

Sounthararajan*,

Sivasankar,

Rao

2019

IJEAT

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This research work has been focused on the early age setting properties of Sugar cane bagasse ash (SCBA) substituted concrete and also monitored the rate of strength gain for different mixes. The waste by-product materials SCBA were replaced 0 to 30% by weight of binding materials in Portland cement with 0 to 3% of calcium nitrate type of accelerator had shown a consistent increase in the rate of setting. It can also be noted that the rate of hardening is higher with addition of 1% accelerator with 20% SCBA accelerates the pozzolanic reactions leading to additional gel formation of C-S-H and C-A-H that leads to the early age of hardening. The test results showed the better improvement in early stage of compressive strength for M25 grade of concrete attained at 3 days up to 34.15 MPa. The preliminary results were enough encouraging that these waste by-products materials were used to produce the quality of structural concrete without affecting their durability and lifespan.

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Ultrasonic measurements during early-stage hydration of ordinary Portland cement

Cited by 12 publications

References 6 publications

Correlation between the Compressive Strength and Ultrasonic Pulse Velocity of Cement Mortars Blended with Silica Fume: An Analysis of Microstructure and Hydration Kinetics

Correlation between the Compressive Strength and Ultrasonic Pulse Velocity of Cement Mortars Blended with Silica Fume: An Analysis of Microstructure and Hydration Kinetics

Detection Technology of Foamed Mixture Lightweight Soil Embankment Based on Ultrasonic Wave Transmission Method

Effects of Calcium Nitrate in Sugar Cane Bagasse Ash and Partial Replacement of Fine Aggregate by Stone Dust

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