Research on the fracture mechanical performance of basalt fiber nano-CaCO3 concrete based on DIC technology

Lian, Huiheng; Sun, Xinjian; Yu, Zhenkun; Yang, Tian; Zhang, Juntao; Li, Guochao; Guan, Zhixuan; Diao, Mushuang

doi:10.1016/j.conbuildmat.2022.127193

Cited by 57 publications

(8 citation statements)

References 51 publications

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“…It should be added that similar phenomena of fracture processes can be observed, for example, in concretes containing expanded polystyrene (EPS) [ 90 ] or recycled polyethylene terephthalate (PET) [ 91 ]. Such an effect was also observed for dispersed reinforcement in the form of basalt fibers at different percentages [ 92 ] and in concretes with a 37% volume fraction of coarse aggregate [ 93 ].…”

Section: Resultsmentioning

confidence: 61%

Fracture Performance of Cementitious Composites Based on Quaternary Blended Cements

Golewski

2022

Materials

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This study presents test results and in-depth discussion regarding the measurement of the fracture mechanics parameters of new concrete composites based on quaternary blended cements (QBC). A composition of the two most commonly used mineral additives, i.e., fly ash (FA) and silica fume (SF), in combination with nanosilica (nS), has been proposed as a partial replacement for ordinary Portland cement (OPC) binder. Four series of concrete were made, one of which was the reference concrete (REF) and the remaining three were QBC. During the research, the main mechanical parameters of compressive strength (fcm) and splitting tensile strength (fctm), as well as fracture mechanics parameters and the critical stress intensity factor (KIcS), along with critical crack-tip opening displacements (CTODc) were investigated. Based on the tests, it was found that the total addition of siliceous materials, i.e., SF + nS without FA, increases the strength and fracture parameters of concrete by approximately 40%. On the other hand, supplementing the composition of the binder with SF and nS with 5% of FA additive causes an increase in all mechanical parameters by approximately 10%, whereas an increase by another 10% in the FA content in the concrete mix causes a significant decrease in all the analyzed factors by 10%, compared to the composite with the addition of silica modifiers only.

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Section: Resultsmentioning

confidence: 61%

Fracture Performance of Cementitious Composites Based on Quaternary Blended Cements

Golewski

2022

Materials

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“…The fracture process of OPC presented an obvious brittle fracture effect at different strain rates, with the curve dropping rapidly after reaching the peak load. When the fiber content was 0.6%, the ductility performance of the specimens after reaching the instability extension stage was more obvious; this was due to the “bridging” effect of fibers in the matrix, which can inhibit the rapid propagation of cracks [ 11 , 31 ], thus improving the fracture toughness of the concrete. It was also found that the strain rate had a significant effect on the peak load of concrete with different fiber content.…”

Section: Resultsmentioning

confidence: 99%

“…It reflects the ability of a material to resist crack growth and is yet another crucial factor to consider while evaluating the fracture performance of BFAPC. It can be determined in terms of the area under the load–deflection curve ( P-δ ) during the three-point bending fracture of the material [ 31 ]. The influence of specimen weight is considered in the calculation, expressed as follows:

where W 0 is the total work performed by the external force (N·m); m is the mass of the beam (kg); g is equal to 9.8 m/s 2 ; δ c is the final mid-span deformation (mm); and

is the area of the fracture section (m 2 ).…”

Section: Resultsmentioning

confidence: 99%

“…The crack opening displacement (COD) value is equal to the difference in displacement between the start and end points of the jump, and the generation of microcracks leads to the fluctuation of lateral displacement. Referring to the relevant literature [ 31 , 48 ], the location where the COD is about 5 μm is defined as the crack tip. Finally, the CTOD and crack length can be determined.…”

Section: Resultsmentioning

confidence: 99%

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Fracture Behavior of Basalt Fiber-Reinforced Airport Pavement Concrete at Different Strain Rates

Xia

Yan

et al. 2022

Materials

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As a commonly used surface structure for airport runways, concrete slabs are subjected to various complex and random loads for a long time, and it is necessary to investigate their fracture performance at different strain rates. In this study, three-point bending fracture tests were conducted using ordinary performance concrete (OPC) and basalt fiber-reinforced airport pavement concrete (BFAPC) with fiber volume contents of 0.2, 0.4, and 0.6%, at five strain rates (10−6 s−1, 10−5 s−1, 10−4 s−1, 10−3 s−1, and 10−2 s−1). Considering parameters such as the peak load, initial cracking load, double K fracture toughness, fracture energy, and critical crack expansion rate, the effects of the fiber volume content and strain rate on the fracture performance of concrete were systematically studied. The results indicate that these fracture parameters of OPC and BFAPC have an obvious strain rate dependence; in particular, the strain rate has a positive linear relationship with peak load and fracture energy, and a positive exponential relationship with the critical crack growth rate. Compared with OPC, the addition of basalt fiber (BF) can improve the fracture performance of airport pavement concrete, to a certain extent, where 0.4% and 0.6% fiber content were the most effective in enhancing the fracture properties of concrete under strain rates of 10−6–10−5 s−1 and 10−4–10−2 s−1, respectively. From the point of view of the critical crack growth rate, it is shown that the addition of BF can inhibit the crack growth of concrete. In this study, the fracture properties of BFAPC were evaluated at different strain rates, providing an important basis for the application of BFAPC in airport pavement.

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“…Coastal clay is characterized by high natural water content, large natural pore ratio, and high compressibility. Seashell powder and limestone powder have similar mechanisms and a certain filling effect in coastal clay [31]. The gap between the coastal cement-clay particles is large and the filling is poor.…”

Section: Stress-strain Curvementioning

confidence: 98%

Strength and freeze-thaw cycle resistance of cement stabilized coastal clay mixed with shell powder

Liu

Wang

2023

Mater. Res. Express

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To study the effect of marine shell powder (SP) on the mechanical properties of cement solidified coastal clay (CSC), unconfined compressive strength test, freeze-thaw cycle test and Scanning Electron Microscope test were conducted on the stabilized soil. The results show that SP could improve the mechanical properties of CSC to some extent. When the SP content was 15%, the strength of CSC was the highest. Moreover, under the condition of freeze-thaw cycle, SP can enhance the compactness of coastal cement-clay, which shows that the pore area decreases by 7.2% during 7 freeze-thaw cycles. Finally, a mathematical empirical model of the unconfined compressive strength, SP content and freeze-thaw cycles of coastal cement-clay modified by seashell powder (SPCSC) specimens was established. The model has a good relevance with the investigated data, which can give a theoretical foundation for improving the performance of coastal cement-clay using seashell powder under different environments.

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Research on the fracture mechanical performance of basalt fiber nano-CaCO3 concrete based on DIC technology

Cited by 57 publications

References 51 publications

Fracture Performance of Cementitious Composites Based on Quaternary Blended Cements

Fracture Performance of Cementitious Composites Based on Quaternary Blended Cements

Fracture Behavior of Basalt Fiber-Reinforced Airport Pavement Concrete at Different Strain Rates

Strength and freeze-thaw cycle resistance of cement stabilized coastal clay mixed with shell powder

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