Study of the failure properties and tensile strength of rock-mortar interface transition zone using bi-material Brazilian discs

Qiu, Hao; Zhu, Zheming; Wang, Meng; Wang, Fei; Luo, Caisong; Wan, Duanying

doi:10.1016/j.conbuildmat.2019.117551

Cited by 47 publications

(8 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equipment. SHPB systems have a history of more than 100 years and are widely used to determine the dynamic mechanical properties of materials [21][22][23][24][25].…”

Section: Methodsmentioning

confidence: 99%

Study of the Dynamic Mechanical Properties of Recycled Concrete Containing Ferronickel Slag Subjected to Impact

Luo

Zhou

et al. 2021

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

In order to study the dynamic mechanical properties of recycled concrete with ferronickel slag, dynamic experiments on cylindrical specimens (φ 73 mm × 36.5 mm) were performed using a split Hopkinson pressure bar (SHPB) system. The effects of loading rate and recycled aggregate replacement rate on the compressive strength, toughness index, peak strain, and failure pattern of the concrete were investigated, and four different loading rates and aggregate replacement rates were selected. In addition, cohesive elements were embedded between C3D8R elements in the numerical model using Python language to simulate the failure process of the recycled concrete, and the reliability of the simulation was validated by the obtained experimental results. It was found that the peak strain of the recycled concrete was significantly higher than that of the ordinary concrete; however, its peak stress was lower than that of the ordinary concrete. In comparison to the recycled concretes containing 70% and 100% recycled coarse aggregates (RCAs), the toughness index amplification of the recycled concrete containing 30% RCAs was the most obvious. The failure pattern and mechanical properties of the numerical model were consistent with those of the test specimens, thus validating the reliability of the numerical simulation.

show abstract

“…Equipment. SHPB systems have a history of more than 100 years and are widely used to determine the dynamic mechanical properties of materials [21][22][23][24][25].…”

Section: Methodsmentioning

confidence: 99%

Study of the Dynamic Mechanical Properties of Recycled Concrete Containing Ferronickel Slag Subjected to Impact

Luo

Zhou

et al. 2021

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

show abstract

“…The RMT-150B rock mechanics test system consists of four parts: the host, the hydraulic system, the servo control system, and the computer control and processing system [44]. The Brazilian disc method [45] was applied to perform tensile strength testing of the specimen by transferring stress to the specimen in the tensile and compressive directions.…”

Section: Static Compressive and Tensile Strength Experimentsmentioning

confidence: 99%

Experimental Study on the Effect of Limestone Powder Content on the Dynamic and Static Mechanical Properties of Seawater Coral Aggregate Concrete (SCAC)

Jiang

Zhu

et al. 2023

Materials

View full text Add to dashboard Cite

The development of island construction concrete can serve as a basis for the development and utilization of island resources. Complying with the principle of using local materials to configure seawater coral aggregate concrete (SCAC) that is able to meet the requirements of island and reef engineering construction could effectively shorten the construction period and cost of island and reef engineering construction. In this paper, quasi-static mechanical experiments and dynamic mechanical experiments were carried out on SCAC with different limestone powder contents. High-speed photography technology and Digital Image Correlation (DIC) were used to monitor the dynamic failure process and strain field of SCAC, and the influence of limestone powder content on the dynamic and static mechanical properties of SCAC was investigated. The results showed that, when the limestone powder content was 20% and 16%, the quasi-static compressive strength and quasi-static tensile strength exhibited the best improvement. Additionally, with increasing limestone powder content, the dynamic tensile strength of SCAC first showed and increasing trend and then a decreasing trend, reaching its maximum value when the limestone powder content was 16%. Moreover, the maximum strain value of SCAC with the same limestone powder content increased with increasing strain rate grade, showing an obvious effect on strain rate.

show abstract

“…Strictly speaking, it could not be used for composite disc with a weak interface in this study. Some researchers choose the peak force to indicate the bearing capacity of the half rock and half mortar specimens (Luo et al 2017), while others still use the above equation to calculate the interface tensile strength (Qiu et al 2020a;Liu et al 2015). Here, we provide both the critical force at tensile fracture initiation and the calculated tensile stress, which is called the referenced tensile strength and is not the actual value of interface tensile strength.…”

Section: Experimental Equipmentmentioning

confidence: 99%

“…Besides, the surface irregularity of formation was also rarely considered. In the field of concrete research, tensile failure of rock-concrete bi-material discs has been investigated experimentally (Luo et al 2017;Qiu et al 2020a) and numerically (Wang et al 2022;Qiu et al 2020b), which could provide reference to the study of tensile debonding of the second interface.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the cementation and tensile properties of cement to formation interface considering surface irregularity and drilling mud residue

Wang

Liu

Guo

et al. 2022

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

Cement sheath is an annular structure situated between casing and formation, which is designed to seal the formation and reinforce the borehole. However, owing to the surface irregularity and drilling mud residue, the interface between the cement sheath and the formation is one of the weakest parts for fluid leakage causing well integrity issues, which would also affect the reliability of the cement bond logs. To evaluate the cementation state and tensile properties of the cement-formation interface, rock-cement composite disc specimens are prepared, considering key factors such as lithology, interface irregularity, treatment of oil-based drilling mud contamination, and flushing fluid washing. Flushing efficiency of the drilling mud contaminated rock surface, interface cementation characteristic, referenced tensile strength, and tensile fracture morphology are acquired and analysed comparatively. Results show that (1) the flushing efficiencies of shale and sandstone are 74.1 ~ 61.9% and 52.4 ~ 28.4%, respectively, decreasing with the increase in surface irregularity. (2) The rock-cement interface gradually becomes poorly cemented as the surface cleanliness decreasing and the irregularity increasing. (3) Under the condition of drilling fluid contamination, there exists a transitional area at the cemented interface, where microcracks and pores are developed. (4) With the influence of drilling mud contamination, the referenced tensile strengths of shale-cement and sandstone-cement interfaces drop from 2.716 to 0.586 MPa and from 2.840 to 0.007 MPa, respectively. The effects of underground temperature and pressure environment are not particularly considered in this study and would be investigated systematically in future research.

show abstract

Study of the failure properties and tensile strength of rock-mortar interface transition zone using bi-material Brazilian discs

Cited by 47 publications

References 33 publications

Study of the Dynamic Mechanical Properties of Recycled Concrete Containing Ferronickel Slag Subjected to Impact

Study of the Dynamic Mechanical Properties of Recycled Concrete Containing Ferronickel Slag Subjected to Impact

Experimental Study on the Effect of Limestone Powder Content on the Dynamic and Static Mechanical Properties of Seawater Coral Aggregate Concrete (SCAC)

Experimental investigation of the cementation and tensile properties of cement to formation interface considering surface irregularity and drilling mud residue

Contact Info

Product

Resources

About