Experimental and Three-dimensional Mesoscopic Simulation Study on Coral Aggregate Seawater Concrete with Dynamic Direct Tensile Technology

Yue, Chengjun; Ma, Hongfang; Yu, Hongfa; Zhang, Jinhua; Chen, Li; Mei, Qiquan; Tan, Yongshan; Liu, Ting

doi:10.1016/j.ijimpeng.2020.103776

Cited by 28 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yuan et al [3] studied the dynamic strength characteristics of dam concrete using the random aggregate model. Yue et al [4] simulated the dynamic tensile properties of coral aggregate seawater con-crete by using the 3D mesoscopic concrete model. In these models and methods, concrete is considered to be composed of aggregate, mortar, and interface [5][6].…”

Section: Instructionmentioning

confidence: 99%

Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set

et al. 2021

View full text Add to dashboard Cite

The dynamic characteristics of concrete are the key point of the dam seismic safety design. In order to study the dynamic characteristics of concrete, a CT scan test of concrete under dynamic load was carried out; CT scan images of the concrete loading process were obtained. Based on the definition of integrity, integrity area, and intercepted sections in the quantitative zoning theory, the concrete CT images were divided into the hole or crack area ( P 0 − λ 1 ), hardened cement stone area ( P λ 1 − λ 2 ), and aggregate area ( P λ 2 − 1 ). And the determination method of partition threshold is studied. Then, based on the CT resolution unit, a concrete numerical calculation model of structural random is established, and the numerical simulation experiment of concrete under uniaxial dynamic load is carried out. The results show that the concrete numerical calculation model of structural random is very close to the actual mesostructure of concrete, and the interface thickness between aggregate and hardened cement is very close to the actual interface thickness (which is 40~50 μm). Under the action of dynamic load, the damage of the sample is mainly concentrated in the upper part of the sample, and the damage is easy to occur at the initial defect place, and the damage occurs at multiple points at the same time. The damage crack is relatively straight, the phenomenon of the crack passing through the aggregate is obvious, and the crack expands along the fastest path of energy release.

show abstract

Section: Instructionmentioning

confidence: 99%

Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set

et al. 2021

View full text Add to dashboard Cite

show abstract

“…However, in the process of island construction, transportation costs and construction durations will undoubtedly be increased if all building materials (especially concrete) need to be transported by land [4][5][6]. In addition, due to the special environment of islands, island buildings and constructions inevitably face the threat of dynamic loading, resulting from phenomena such as earthquakes and explosions [7,8]. Therefore, methods for producing and processing seawater coral aggregate concrete (SCAC) enable to meet the requirements of island and reef engineering construction using local materials in order to reduce economic costs and shorten construction periods while satisfying the needs of island and reef engineering construction projects is a key issue in island and reef construction.…”

Section: Introductionmentioning

confidence: 99%

“…Some scholars have explored ways of improving the strength of SCAC by optimizing the mix ratio [8,17,18], while others have attempted to improve the performance of SCAC by adding fibers to SCAC. Some scholars have attempted the addition of plant fibers (such as sisal fibers) to SCAC to improve its performance [7,19,20]. Xu et al [21] added glass fibers to SCAC and developed a method for analyzing the development of internal cracks in glass-fiberreinforced polymer-sea sand concrete composites, and the strength enhancement effect of glass fibers on SCAC was studied.…”

Section: Introductionmentioning

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

Study on the size effect of rock under dynamic direct tension and indirect tension

Jia,

Zhai,

Liu

2023

Environ Earth Sci

View full text Add to dashboard Cite

Experimental and Three-dimensional Mesoscopic Simulation Study on Coral Aggregate Seawater Concrete with Dynamic Direct Tensile Technology

Cited by 28 publications

References 22 publications

Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set

Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set

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

Study on the size effect of rock under dynamic direct tension and indirect tension

Contact Info

Product

Resources

About