Experimental study on mechanical properties and damage mechanism of basalt fiber reinforced concrete under uniaxial compression

Yang, Liyun; Xie, Huanzhen; Fang, Shizheng; Huang, Chen; Yang, Aiyun; Chao, Yuh J.

doi:10.1016/j.istruc.2021.01.071

Cited by 87 publications

(31 citation statements)

References 24 publications

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“…They concluded that with the increase in basalt fiber content, local damage could be effectively weakened. Their results showed that the proper amount of basalt fiber in concrete delayed the early cracking and reduced the transverse strain of concrete [ 172 ]. Shen et al conducted a study on reinforced concrete beam-column joints by strengthening them with basalt-fiber-reinforced polymer sheets in different ways under cyclic loads.…”

Section: Geopolymers and Natural Fiber-reinforced Compositesmentioning

confidence: 99%

Geopolymers and Fiber-Reinforced Concrete Composites in Civil Engineering

et al. 2021

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This paper discusses the influence of fiber reinforcement on the properties of geopolymer concrete composites, based on fly ash, ground granulated blast furnace slag and metakaolin. Traditional concrete composites are brittle in nature due to low tensile strength. The inclusion of fibrous material alters brittle behavior of concrete along with a significant improvement in mechanical properties i.e., toughness, strain and flexural strength. Ordinary Portland cement (OPC) is mainly used as a binding agent in concrete composites. However, current environmental awareness promotes the use of alternative binders i.e., geopolymers, to replace OPC because in OPC production, significant quantity of CO2 is released that creates environmental pollution. Geopolymer concrete composites have been characterized using a wide range of analytical tools including scanning electron microscopy (SEM) and elemental detection X-ray spectroscopy (EDX). Insight into the physicochemical behavior of geopolymers, their constituents and reinforcement with natural polymeric fibers for the making of concrete composites has been gained. Focus has been given to the use of sisal, jute, basalt and glass fibers.

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Section: Geopolymers and Natural Fiber-reinforced Compositesmentioning

confidence: 99%

Geopolymers and Fiber-Reinforced Concrete Composites in Civil Engineering

et al. 2021

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“…In order to reduce the ferrule effect caused by the friction between the upper and lower steel plates of the universal testing machine and the specimen, Vaseline was applied to the compression surface of the specimen, and horizontal strain gauges and vertical strain gauges were affixed to the free surface of the EPUC to test the Poisson's ratio. Figure 3 shows the JM3812 multi-functional static strain acquisition system (Jingming Technology Co. Ltd., Yangzhou, China), and the loading speed of the universal testing machine (Sansizongheng Technology Co. Ltd., Shenzhen, China) was 0.5 mm/min [21]. Figure 4 shows the compressive strength test diagram of EPUC.…”

Section: Mechanical Properties Testmentioning

confidence: 99%

Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites

Jia

Sun

et al. 2021

Materials

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In order to solve issues related to bridge girders, expansion devices and road surfaces, as well as other structures that are prone to fatigue failure, a kind of fatigue-resistant elastic polyurethane concrete (EPUC) was obtained by adding waste rubber particles (40 mesh with 10% fine aggregate volume replacement rate) to conventional engineering polyurethane concrete (PUC). Based on the preparation and properties of EPUC, its constitutive relation was proposed through compression and tensile tests; then, a scanning electron microscope (SEM), an atomic force microscope (AFM) and a 3D non-contact surface profilometer were used to study the failure morphology and micromechanisms of EPUC. On this basis, four-point bending fatigue tests of EPUC were carried out at different temperature levels (−20 °C, 0 °C, 20 °C) and different strain levels (400 με~1200 με). These were used to analyze the stiffness modulus, hysteresis angle and dissipated energy of EPUC, and our results outline the fatigue life prediction models of EPUC at different temperatures. The results show that the addition of rubber particles fills the interior of EPUC with tiny elastic structures and effectively optimizes the interface bonding between aggregate and polyurethane. In addition, EPUC has good mechanical properties and excellent fatigue resistance; the fatigue life of EPUC at a room temperature of 600 με can grow by more than two million times, and it also has a longer service life and reduced disease frequency, as well as fewer maintenance requirements. This paper will provide a theoretical and design basis for the fatigue resistance design and engineering application of building materials. Meanwhile, the new EPUC material has broad application potential in terms of roads, bridges and green buildings.

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“…The peeling phenomenon is not obvious. This performance is related to the level of fiber dosage, and the best effect is achieved at the fiber dosage of 3 kg/m 3 , where only short cracks appear on the surface of the specimens after destruction, as shown in Figure 11b,c [18].…”

Section: The Uniaxial Compressive Strengthmentioning

confidence: 92%

“…At present, the research methods for fiber distribution are as follows: SEM scanning [16], mercury pressure, and the nuclear magnetic resonance method are used to analyze pore structure [17]. The research on fractures has been mainly conducted using the acoustic emission method and digital image correlation technology [18]. If we want to study the fine structure of basalt fiber concrete, two or more methods are usually needed to realize results, and these methods also have different limitations.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Internal Defects and Fiber Distribution of BFRC Based on the Digital Image Processing Technology

Chen

Jiao

et al. 2021

Crystals

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Adding basalt fiber into concrete can significantly improve its mechanical properties. In order to explore the influence of basalt fiber content on the uniaxial compressive strength and splitting tensile strength of concrete and the mechanism of fiber action, this paper conducts compressive and splitting tensile tests on three kinds of basalt fiber concrete specimens with different fiber content and obtains the relationship between the macro mechanical properties and the fiber content. At the same time, with the help of CT scanning equipment and digital image processing technology, the microstructure of basalt fiber concrete with three groups of fiber content is reconstructed, and the pore, crack, and fiber distribution are quantitatively described using the calculation and processing function of the Avizo reconstruction software. The results show that when the optimal fiber content is 3 kg/m3, the improvement rates of uniaxial compressive strength and splitting tensile strength are 31.9% and 23.7%, respectively. The network structure formed by fiber in concrete has the best compactness and the least number of pores, with an average sphericity of 0.89 and an average pore volume of 20.26 μm3. Through analysis, it was found that the initial defects of basalt fiber concrete exist in the form of pores, and the addition of basalt fiber will destroy the large pore size of concrete, change the pore size distribution, and increase the average sphericity; The distribution of the fiber in the concrete is a three-dimensional network, and the distribution of the fiber in the initial defect distribution area is parallel to the direction of pore arrangement.

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Experimental study on mechanical properties and damage mechanism of basalt fiber reinforced concrete under uniaxial compression

Cited by 87 publications

References 24 publications

Geopolymers and Fiber-Reinforced Concrete Composites in Civil Engineering

Geopolymers and Fiber-Reinforced Concrete Composites in Civil Engineering

Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites

Characterization of Internal Defects and Fiber Distribution of BFRC Based on the Digital Image Processing Technology

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