Coupled effect of curing temperature and age on compressive behavior, microstructure and ultrasonic properties of cemented tailings backfill

Xu, Wenbin; Li, Qianlong; Liu, Bin

doi:10.1016/j.conbuildmat.2019.117738

Cited by 50 publications

(17 citation statements)

References 37 publications

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“…Therefore, data adjustment of four points could be improved in future works. Several researches conducted by other authors largely agree with these findings that, altogether, highlight the validity of the linear relationship between UPV and mechanical strength [48][49][50]. As cement cures, it changes from a liquid state to a solid state; consequently, the acoustic waves show a faster travel response.…”

Section: Correlation Between 28-day Compressive Strength and Average supporting

confidence: 69%

“…The ranges given in Table 4 have been established considering the following criteria; (i) a good curing in Portland cement mortars provides a dense and compact microstructure (excellent mortar quality); (ii) a good curing in CFA mortars leads to good quality mortars; (iii) a bad curing in Portland cement mortars is the reason of a higher porosity (bad mortar quality); and (iv) a bad curing affects strongly to CFA mortars, therefore, it invariably comes to a very poor mortar quality. With regard to the curing temperature, Xu et al found that UPV increase with the increase of curing temperature in cemented tailings backfill [48]. They obtained a linear relationship between UPV and compressive strength.…”

Section: Effect Of the Curing Conditions On The Average Ultrasonic Vementioning

confidence: 99%

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Ultrasonic Pulse Velocity—Compressive Strength Relationship for Portland Cement Mortars Cured at Different Conditions

et al. 2020

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The purpose of this paper is to establish some correlations between the main technical parameter with regard to the cement-based materials technology, the 28-day compressive strength, and ultrasonic pulse velocity of standard mortar samples cured at three different conditions—(i) under water at 22 °C; (ii) climatic chamber at 95% RH and 22 °C; (iii) lab ambient, 50% RH, and 22 °C—and after five curing periods of 1, 2, 7, 14, and 28 days. Good correlations for each curing conditions were obtained. All the positive linear relationships showed better R2 than exponential ones. These findings may promote the use of ultrasonic pulse velocity for the estimation of the 28-day compressive strength of standard Portland cement samples within the factory internal quality control.

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Section: Correlation Between 28-day Compressive Strength and Average supporting

confidence: 69%

Section: Effect Of the Curing Conditions On The Average Ultrasonic Vementioning

confidence: 99%

Ultrasonic Pulse Velocity—Compressive Strength Relationship for Portland Cement Mortars Cured at Different Conditions

et al. 2020

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“…Additionally, studies have examined the relationship between compressive strength and UPV for cementitious materials in terms of mixture proportions. UPV is closely related to the mechanical properties and microstructures of cementitious materials [ 25 , 26 , 27 ], both of which are greatly influenced by the hydration reaction between the binder materials and water. Therefore, the effect of the replacement rate of SF on the correlation between compressive strength and UPV should be analyzed from a material point of view.…”

Section: Introductionmentioning

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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“…However, there are a few studies on the effect of ambient temperature as an influencing factor on the performance of CPB. In addition, some studies only investigated the effect of a single factor on CPB performance [14,15].…”

Section: Introductionmentioning

confidence: 99%

Influence of Binder Types and Temperatures on the Mechanical Properties and Microstructure of Cemented Paste Backfill

Chen

Wang

et al. 2021

Advances in Civil Engineering

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In order to study the influence of burial depth or fire on the core area of cemented paste backfill (CPB), the experiment of CPB with different types of binder and temperature was carried out. Three types of binders, red mud (RM), Portland cement (PC), and slag cement (SC), are used and tested at 20°C, 40°C, 60°C, and 80°C. The macroperformance and microstructural evolution of CPB are analyzed using slump, uniaxial compressive strength (UCS), X-ray diffraction, and scanning electron microscopy (SEM). The results show that the coupled effects of binder type and temperature have a significant impact on the macroscopic performance and microstructural evolution of CPB. The CPB slump prepared with three types of binder meets the production requirement of the mine. Regardless of curing temperature and curing time, the uniaxial compressive strength of CPB samples with PC and SC is much higher than that of CPB samples with red mud. When cured for 12 hours, the uniaxial compressive strength of CPB samples containing PC and SC increases first, then decreases, and finally increases again with the increase of temperature. However, with the increase of temperature, the uniaxial compressive strength of CPB samples containing RM only increases first and then decreases. When the curing temperature is less than 40°C, the main reason for the increase in UCS was attributed to the fact that the temperature increase accelerates the hydration reaction and improves the density of the sample. When the curing temperature is 60°C, the main reason for the decrease in UCS is the formation of the expansive ettringite (AFt) which destroys the internal spatial structure of the sample. When the curing temperature is 80°C, the UCS increases again due to the fact that such high temperature can destroy the crystal structure of AFt and harden the hydration product C-S-H gel.

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Coupled effect of curing temperature and age on compressive behavior, microstructure and ultrasonic properties of cemented tailings backfill

Cited by 50 publications

References 37 publications

Ultrasonic Pulse Velocity—Compressive Strength Relationship for Portland Cement Mortars Cured at Different Conditions

Ultrasonic Pulse Velocity—Compressive Strength Relationship for Portland Cement Mortars Cured at Different Conditions

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

Influence of Binder Types and Temperatures on the Mechanical Properties and Microstructure of Cemented Paste Backfill

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