Exploring the link between ultrasonic and strength behavior of cementitious mine backfill by considering pore structure

Sari, Muhammet; Yilmaz, Erol; Kasap, Tugrul; Karasu, Servet

doi:10.1016/j.conbuildmat.2023.130588

Cited by 37 publications

(6 citation statements)

References 125 publications

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“…In contrast to UCS, the UPV for the reference sample was the highest among the treatments. This could be a ributed to a higher moisture content: microwave treatment may have enhanced evaporation, leaving behind unoccupied voids, which decrease the UPV by increasing the time required for the wave to travel between the transmi er and receiver [53]. A similar effect was observed in concrete samples from 0 to 100% water saturation [61].…”

Section: Effect Of Microwave-assisted Curing On Upvmentioning

confidence: 80%

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Experimental Development of an Innovative Approach to Enhance the Strength of Early Age Cemented Paste Backfill: A Preliminary Investigation of Microwave-Assisted Curing

Hefni

2023

Minerals

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In underground mining, the application of mine backfill has evolved into a standard practice. Mine backfill typically consists of tailings, water, and hydraulic binders. However, the high cost of binders has prompted scholars to research alternatives to reduce this cost while maintaining or even improving the properties of the backfill. One potential alternative is leveraging microwave irradiation. In this study, an innovative approach was developed to increase the unconfined compressive strength (UCS) of early age cemented paste backfill (CPB). Microwave treatment was applied to CPB samples at various curing ages for varying durations. The UCS and ultrasonic pulse velocities were measured and analyzed in an experiment with a full factorial design. Moreover, the microstructural properties of the CPB were investigated using mercury intrusion porosimetry. The results indicate a significant potential to increase the UCS of CPB by up to 25% when microwave-treating samples for 8 min after 7 days of curing. This approach could shorten mining cycle times and improve productivity, presenting a promising method to enhance CPB strength.

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Section: Effect Of Microwave-assisted Curing On Upvmentioning

confidence: 80%

“…Before conducting the test, the transmitter and receiver were coated with an ultrasound gel to make better contact with the samples. A constant pressure of approximately 10 N was applied by hand between the sample surfaces and transducers, following the procedure in [52,53]. This was important to obtain consistent readings.…”

Section: Upv Testsmentioning

confidence: 99%

Experimental Development of an Innovative Approach to Enhance the Strength of Early Age Cemented Paste Backfill: A Preliminary Investigation of Microwave-Assisted Curing

Hefni

2023

Minerals

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“…In some cases, it may be necessary to access both sides of the material being tested, which can be challenging in some aircraft components. Surface finish and complex geometry can affect the accuracy of the inspection [30].…”

Section: Disadvantages Of Ultrasonic Testingmentioning

confidence: 99%

Non-destructive testing methods commonly used in aviation

Ulus,

Davarcı,

Gültekin

2024

International Journal of Aeronautics and Astronautics

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Non-Destructive Testing (NDT) methods play a pivotal role in ensuring the safety and reliability of aircraft in the aviation industry. This article provides a comprehensive overview of the NDT techniques commonly employed in aviation to assess the structural integrity and performance of aircraft components and materials without causing any damage. The article discusses the significance of NDT in aviation, highlighting the importance of early defect detection, maintenance cost reduction, and enhanced operational safety. It delves into various NDT methods, such as ultrasonic testing, eddy current testing, radiographic inspection, magnetic particle testing, and dye penetrant testing, explaining their principles and applications. In addition, in this article, the advantages and disadvantages of NDT methods and which methods are used in which part of the aircraft are mentioned. Understanding these NDT methods is crucial for aviation professionals, as they contribute to the continued airworthiness of aircraft, ensuring that passengers and crew can travel safely and confidently.

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“…The rapid development and utilisation of mineral resources have provided a basic guarantee for the rapid development of China's economy. At the same time, due to the restriction of development level and economic conditions, China has paid a considerable price in terms of environment and safety [1][2]. At present, the tailing stock formed by mining and dressing in China reaches 14.6 billion tons, covering an area of 8700 km 2 , equivalent to the area four times the size of Shenzhen.…”

Section: Introductionmentioning

confidence: 99%

Strength and Crack Propagation Analysis of Layered Backfill Based on Energy Theory

Cai,

Sun,

Zhang

et al. 2024

Archives of Mining Sciences

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The strength of backfill is greatly influenced by its inclination angle and interlayer concentration. In order to study the influence of inclination angle and interlayer mass concentration on the strength of backfill, a group of layered cemented backfill with cement-sand ratio of 1:4, interlayer mass concentration of 66%, 67% and 68% and inclination angles of 0°, 10°, 20° and 30° were prepared by using tailings as aggregate. The uniaxial compression test was carried out to analyse the effect of interlayer mass concentration and inclination angle on layered cemented backfill. The crack propagation and energy change law of the specimen during compression were analysed by J-integral and energy conservation law. The relationship between the crack initiation and propagation and strain energy of two representative three-layer backfill specimens was analysed by numerical modelling. The results show that the increase in the layer number and the inclination angle of the backfill can weaken the strength of the backfill. In a certain range of inclination angles, the weakening coefficient of the backfill caused by the inclination angle is very consistent with the cosine value of the corresponding angle. Due to the release of crack energy and the existence of interface J integral, the uniaxial compressive strength of different mass concentration backfill is different at various positions. When the displacement reaches a certain value, the crack and strain energy no longer increase.

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Exploring the link between ultrasonic and strength behavior of cementitious mine backfill by considering pore structure

Cited by 37 publications

References 125 publications

Experimental Development of an Innovative Approach to Enhance the Strength of Early Age Cemented Paste Backfill: A Preliminary Investigation of Microwave-Assisted Curing

Experimental Development of an Innovative Approach to Enhance the Strength of Early Age Cemented Paste Backfill: A Preliminary Investigation of Microwave-Assisted Curing

Non-destructive testing methods commonly used in aviation

Strength and Crack Propagation Analysis of Layered Backfill Based on Energy Theory

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