scholarly journals Mechanical Properties and Fracture Behavior of Crumb Rubber Basalt Fiber Concrete Based on Acoustic Emission Technology

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3513 ◽  
Author(s):  
Hanbing Liu ◽  
Wenjun Li ◽  
Guobao Luo ◽  
Shiqi Liu ◽  
Xiang Lyu
Keyword(s):  
Mechanical Properties ◽  
Acoustic Emission ◽  
Fracture Behavior ◽  
Basalt Fiber ◽  
Crumb Rubber ◽  
Fiber Content ◽  
Replacement Rate ◽  
Fiber Concrete ◽  
Binder Ratio ◽  
Water Binder Ratio

Basalt fiber and crumb rubber, as excellent road material modifiers, have great advantages in improving the mechanical properties and fracture behavior of concrete. Acoustic emission (AE) is a nondestructive testing and real-time monitoring technique used to characterize the fracture behavior of concrete specimens. The object of this paper is to investigate the effects of crumb rubber replacement rate, basalt fiber content and water–binder ratio on the mechanical properties and fracture behavior of crumb rubber basalt fiber concrete (CRBFC) based on orthogonal test. The fracture behavior of a CRBFC specimen under three-point flexural conditions was monitored by AE technology and the relative cumulative hit (RCH) was defined to characterize the internal damage degree of CRBFC. The experimental results showed that, considering the mechanical strength and fracture damage behavior of CRBFC, the optimal crumb rubber replacement rate, basalt fiber content and water–binder ratio are 10%, 2 kg/m3 and 0.46, respectively. In addition, it was found that AE parameters can effectively characterize the fracture behavior of CRBFC. The fracture stages of CRBFC can be divided according to the cumulative AE hits and counts. AE amplitude value can be used as an early warning of CRBFC specimen fracture. Moreover, the fracture mode can be identified by RA and average frequency (AF) values variation during the loading process.

scholarly journals Design Optimization of Rubber-Basalt Fiber- Modified Concrete Mix Ratios Based on a Response Surface Method

2020 ◽  
Vol 10 (19) ◽  
pp. 6753
Author(s):  
Yafeng Gong ◽  
Jiaxiang Song ◽  
Siyuan Lin ◽  
Jianxing Yang ◽  
Yang He ◽  
...  
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Basalt Fiber ◽  
Fiber Content ◽  
Quadratic Term ◽  
Rubber Content ◽  
Surface Method ◽  
Rsm Optimization ◽  
Binder Ratio ◽  
Water Binder Ratio

Rubber aggregates produced from waste rubber materials and environmentally friendly basalt fibers are excellent concrete modification materials, which significantly improve the working performance and mechanical properties of concrete. This paper studied the influences of water-binder ratio, basalt fiber content and rubber content on the properties of rubber-basalt fiber modified concrete (RBFC). Based on the response surface method (RSM), optimization schemes of three preparation parameters were designed. The results showed that all preparation parameters have significant impacts on the slump. The rubber content has a closer relationship with the compressive strength and the quadratic term of the basalt fiber content has a significant impact on the flexural strength. According to the analysis, the optimal mix ratio which possesses reliable accuracy compared with experimental results includes a water-binder ratio of 0.39, a basalt fiber content of 4.56 kg/m3 and a rubber content of 10%,

scholarly journals Mechanical Properties and Crack Classification of Basalt Fiber RPC Based on Acoustic Emission Parameters

2019 ◽  
Vol 9 (18) ◽  
pp. 3931 ◽  
Author(s):  
Hanbing Liu ◽  
Shiqi Liu ◽  
Peilei Zhou ◽  
Yuwei Zhang ◽  
Yubo Jiao
Keyword(s):  
Mechanical Properties ◽  
Acoustic Emission ◽  
Univariate Analysis ◽  
Basalt Fiber ◽  
Average Frequency ◽  
Fiber Content ◽  
Reactive Powder ◽  
Non Destructive

The workability and mechanical properties of basalt fiber reactive powder concrete (BFRPC) were investigated by univariate analysis. The acoustic emission (AE) was used as a non-destructive technique to reveal the damage characterization of concrete samples of varying basalt fiber content. The fracture stages and modes of specimens during flexural test were determined by AE parameters. The content of silica fume, quartz sand and basalt fiber of 0.4, 1.3 and 10 kg/m3, respectively, was found related to optimal improvements in mechanical strength. As for the characteristics of fracture, it was found that the fiber content was a significant determinant, and the key AE parameters, namely, hits, energy and amplitude, were found related to the damage stage of specimens. Furthermore, rise time (RA) and average frequency (AF) were found to have opposite trends during loading while their variation related to the fracture modes of BFRPC.

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

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 847
Author(s):  
Fengbin Chen ◽  
Bin Xu ◽  
Huazhe Jiao ◽  
Zhuen Ruan ◽  
Juanhong Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Image Processing ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Digital Image Processing ◽  
Digital Image ◽  
Basalt Fiber ◽  
Fiber Content ◽  
Fiber Distribution ◽  
Fiber Concrete

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.

Research in the Preparation of Paving Bricks with Construction Garbage

2013 ◽  
Vol 712-715 ◽  
pp. 917-920
Author(s):  
Lian Xi Wang ◽  
Guang Hui Pan ◽  
Fu Yong Li ◽  
Hai Ming Wang ◽  
Guo Zhong Li
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Experimental Results ◽  
Replacement Rate ◽  
Coarse Aggregates ◽  
Waste Concrete ◽  
Fine Aggregates ◽  
Binder Ratio ◽  
Water Binder Ratio

Construction garbage paving bricks were made of recycled coarse and fine aggregates which were prepared by the waste concrete. The influence of replacement rate of recycled coarse aggregates, water-binder ratio and excitation agent dosage on the compressive strength and flexural strength of construction garbage paving bricks were researched. The experimental results show that optimum replacement rate of recycled coarse aggregates, water-binder ratio and excitation agent dosage were 100%, 0.43 and 1.5% respectively. In this proportion, the 7d, 28d compressive strength of the products were 15.6MPa, 37.5MPa respectively, and the 7d, 28d flexural strength were 2.0MPa, 4.3MPa respectively, which fit the requirements of the Cc30 level of compressive strength and the Cf4.0 level of flexural strength involved in JCT 446-2000 "concrete pavers".

scholarly journals Effect of Mix Proportion Parameters on Behaviors of Basalt Fiber RPC Based on Box-Behnken Model

2019 ◽  
Vol 9 (10) ◽  
pp. 2031 ◽  
Author(s):  
Hanbing Liu ◽  
Shiqi Liu ◽  
Shurong Wang ◽  
Xin Gao ◽  
Yafeng Gong
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Basalt Fiber ◽  
Fiber Content ◽  
Reactive Powder Concrete ◽  
Basalt Fibers ◽  
Factors Affecting ◽  
Remarkable Effect ◽  
Mix Proportion ◽  
Reactive Powder

Basalt fibers are widely used in the modification of concrete materials due to its excellent mechanical properties and corrosion resistance. In this study, the basalt fibers were used to modify reactive powder concrete (RPC). The effect of four mix proportion parameters on the working and mechanical properties of basalt fiber reactive powder concrete (BFRPC) was evaluated by the response surface methodology (RSM). The fluidity, flexural and compressive strength were tested and evaluated. A statistically experimental model indicated that D (the silica fume to cement ratio) was the key of interactions between factors, affecting other factors and controlling properties of BFRPC. The increase in basalt fiber content had a remarkable effect on increasing the flexural and compressive strength when D = 0.2. The addition of basalt fiber obviously improved the mechanical properties of RPC. While when D = 0.4, the decrease of fiber content and the increase of quartz sand content could increase the compressive strength.

Investigation on mechanical properties and failure mechanisms of basalt fiber reinforced aluminum matrix composites under different loading conditions

2017 ◽  
Vol 52 (14) ◽  
pp. 1907-1914 ◽  
Author(s):  
Yang Zhiming ◽  
Liu Jinxu ◽  
Feng Xinya ◽  
Li Shukui ◽  
Xu Yuxin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Failure Mechanisms ◽  
Basalt Fiber ◽  
Aluminum Matrix ◽  
Fiber Content ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Basalt Fibers ◽  
Static Compression

Basalt fiber reinforced aluminum matrix composites with different fiber contents (i.e. 0 wt%, 10 wt%, 30 wt% and 50 wt%) were prepared by hot-press sintering. Microstructure analysis indicates that basalt fibers are uniformly distributed in 10% basalt fiber reinforced aluminum matrix composite. The interfacial bonding between basalt fibers and aluminum matrix is good, and there is no interface reaction between basalt fiber and aluminum matrix. Quasi-static tensile, quasi-static compression and dynamic compression properties of basalt fiber reinforced aluminum composites were studied, and the influences of basalt fiber content on mechanical properties were discussed. Meanwhile, the failure mechanisms of basalt fiber reinforced aluminum matrix composites with different fiber content were analyzed.

Study on Performance about Hybrid Fiber Concrete of Airport Pavement

2014 ◽  
Vol 1065-1069 ◽  
pp. 706-709 ◽  
Author(s):  
Xiao Jun Liu ◽  
Che Fei Zhu ◽  
Yong Gen Wu ◽  
Qing Tao Liu
Keyword(s):  
Mechanical Properties ◽  
Steel Fiber ◽  
Volume Fraction ◽  
Orthogonal Experiment ◽  
Basalt Fiber ◽  
Fiber Reinforced Concrete ◽  
Hybrid Fiber ◽  
Airport Pavement ◽  
Fiber Concrete ◽  
Pavement Concrete

In order to meet the requirements of the use of aircraft, improve mechanical properties of pavement concrete, the steel fiber mixed basalt hybrid fiber reinforced concrete technical route was proposed, by using the method of orthogonal experiment, steel fiber with 1.2%,1.5%,1.8% these 3 volume fraction and basalt fiber in 0.05%,0.1%,0.15% these 3 volume fraction mixed, research the rules of its effect on the performance of airport pavement concrete.

scholarly journals Influence of basalt fiber on tribological properties of secondary polyethylene terephthalate

2021 ◽  
Vol 100 (2) ◽  
pp. 58-64
Author(s):  
A.-M. Tomina ◽  
◽  
A. Yerоmenko ◽  
V. Makarov ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyethylene Terephthalate ◽  
Polymer Matrix ◽  
Tribological Properties ◽  
Basalt Fiber ◽  
Fiber Content ◽  
Linear Wear ◽  
Friction Zone ◽  
Initial Polymer ◽  
The Coefficient Of Friction

The article considers the influence of discrete (3 mm) basalt fiber on the tribological properties of secondary agglomerated polyethylene terephthalate. It was found that the introduction of the filler reduces the coefficient of friction and the intensity of linear wear of the initial polymer 1,5 and 4,5 times, respectively, reaching the minimum values at a basalt fiber content of 5 mass.%. The obtained results are due to the fact that the appearance of basalt fiber strengthens the polymer matrix that confirms the increase in hardness by 15%, and inhibits the development of cracks on the surface of the composite. The study of the temperature in the contact zone showed its increase that is due to the low thermal conductivity of the filler (0,064 - 0,096); as a result, there is an accumulation of heat in the friction zone. Further increase in fiber content (up to 10 mass.%) leads to a sharp deterioration of the tribological and physico-mechanical properties of basaltoplastics because of the increase in the defect of the material. It is determined that the effective content of filler in the polymer matrix is 5 mass.%. As a result, this composite was recommended for the manufacture of parts for movable joints of agricultural, automotive and metallurgical equipment.

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