Mechanical properties and meso-microscopic mechanism of basalt fiber-reinforced recycled aggregate concrete

Zheng, Ying‐Ying; Zhuo, Jingbo; Zhang, Peng; Ma, Mei

doi:10.1016/j.jclepro.2022.133555

Cited by 114 publications

(22 citation statements)

References 49 publications

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“…Eqs. (10), (13) and (14) directly present the relationship between compressive strength and UPV value without considering the characteristics of the concrete itself. After comparative analysis, the deviation between the three formulas is obvious, which is obviously not universal.…”

Section: Modulus Of Elasticitymentioning

confidence: 99%

“…By increasing the recycling and reuse of construction waste, environmental pollution can be reduced and construction raw material resources can be saved. Numerous studies have demonstrated that RA can successfully substitute natural coarse and fine aggregates, and provide the performance required for normal structural concrete [10,11]. Nevertheless, RA has significantly lower performance than NA in some aspects [12].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Recycled Aggregate and Slag as Substitutes for Natural Aggregate and Cement on the Properties of Concrete: A Review

Zhang¹,

Wang²,

Zheng³

et al. 2023

Journal of Renewable Materials

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Using recycled aggregate (RA) and slag instead of natural aggregate (NA) and cement can reduce greenhouse gas emissions (GHGE) and achieve effective waste recovery. In recent years, RA has been widely used to replace NA in concrete. Every year, several researchers conduct investigations on the mechanical performance and durability of recycled aggregate concrete (RAC). Due to the loose and porous material properties of RA, the mechanical properties and durability of RAC, such as strength, carbonation resistance, permeability resistance and chloride ion penetration resistance, are greatly reduced compared with natural aggregate concrete. In contrast, concrete containing slag instead of NA and cement generally improved the strength of concrete and reduced the internal porosity of materials. Herein, we discuss the effects of RA and slag on the workability, compressive strength, splitting tensile strength, ultrasonic pulse velocity (UPV) value, and elastic modulus of concrete. The relationships between the compressive strength and the splitting tensile strength, UPV value, and elastic modulus are discussed, and the optimal substitution method is proposed. In addition, various equations for calculating the compressive strength of concrete based on performance factors related to the compressive strength are summarized.

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Section: Modulus Of Elasticitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Recycled Aggregate and Slag as Substitutes for Natural Aggregate and Cement on the Properties of Concrete: A Review

Zhang¹,

Wang²,

Zheng³

et al. 2023

Journal of Renewable Materials

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show abstract

“…One is to model the separated fibers from the cement mortar and assign specific material properties to the fibers, which is common in coarse diameter and large volume steel fiber concrete [ 52 , 53 ]. The other is to consider the fibers and cement mortar as a whole and describe them as fiber-reinforced mortar, common in tiny diameters and large numbers of fibers [ 54 , 55 ]. BF and PVAF used in this paper belong to μm level fibers, and the number of fibers cannot be accurately calculated.…”

Section: Mesoscale Simulation Analysis Of Hybrid Fiber-reinforced Lhpccmentioning

confidence: 99%

Macro-Mesoscale Mechanical Properties of Basalt-Polyvinyl Alcohol Hybrid Fiber-Reinforced Low-Heat Portland Cement Concrete

Zheng

2023

Polymers

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To investigate the mechanical properties of hybrid basalt fiber (BF) and polyvinyl alcohol fiber (PVAF)-reinforced low-heat Portland cement concrete (LHPCC), two groups of concrete were formulated. The BF and PVAF were equal in the first group, and the total fiber contents were 0–0.4%. The second group was the total fiber content of 0.3% and the occupancy of BF in the hybrid fiber of 0, 25%, 50%, 75%, and 100%. Two groups of concrete were tested for compressive, splitting tensile, and flexural strengths to illustrate the enhanced mechanism of the mechanical properties of LHPCC by hybrid fiber. The best mechanical property enhancement was achieved when BF and PVAF were in equal proportions and the fiber content was 0.3%. Meanwhile, the test results for the mechanical properties were also compared with the predicted values of ACI 318 and Eurocode 2. Moreover, the hybrid BF-PVAF-reinforced concrete was regarded as a three-phase composite material consisting of fiber-reinforced mortar, coarse aggregate, and an interfacial transition zone. The axial compressive and splitting tensile strengths, damage processes, and mechanical strengthening mechanisms of concrete were investigated for different total fiber content at equal ratios of BF and PVAF, and the results were compared with the macroscopic mechanical test findings. The results show that the conclusion of the meso-simulation matches well with the test. Finally, the effect of aggregate and hybrid fiber content on the mechanical properties of LHPCC was predicted by a simulation. The results of this study can provide references for future mechanical modeling, performance studies, and practical engineering applications of LHPCC.

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“…As a kind of fiber reinforced composite material, the bending and cracking resistance of UHPC are closely related to the variation of fiber length and volume (Yoo et al, 2016;Yoo et al, 2017;Zhang et al, 2022d;Wen et al, 2022;Yoo et al, 2022;Zheng et al, 2022), the interfacial properties between fiber and matrix (Shannag et al, 1997;Wu et al, 2018;Mo et al, 2021), and the fiber distribution and orientation (Zerbino et al, 2012;Huang et al, 2018;Meng et al, 2022). When the orientation of the steel fiber is parallel to the direction of the main tensile stress, the effectiveness of the fiber in the bridge crack is the highest.…”

Section: Effect Of Steel Fiber Orientation Distribution On Flexural S...mentioning

confidence: 99%

An ultra-high performance concrete incorporating viscosity-controlling agent: Fiber distribution and microstructure

Zhao

Zhang²,

Chen³

et al. 2023

Front. Mater.

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In order to realize the stability of steel fiber inside ultra-high performance Concrete (UHPC) under vibration and improve the use efficiency of fiber, bentonite is used as auxiliary cementitious material in this study. The influence of bentonite dosage on the mechanical properties of UHPC matrix and the mechanical properties and microstructure of ultra-high Performance fiber Reinforced Concrete (UHPFRC) is explored. On this basis, the functional relationships between the distribution and orientation of steel fibers, the freshness of the matrix and the rheological parameters of UHPC are established, and the evaluation model of the service efficiency of steel fibers is established. The results show that with the gradual increase of bentonite incorporation, the use efficiency of UHPFRC steel fiber increases first and then decreases, and when the cement content of bentonite was 2.5%, 5.0%, 7.5% and 10.0%, the flexural strength of UHPFRC increased by 9.0%, 17.6%, 18.5% and 6.1%, respectively. In addition, the increase of bentonite content will lead to the continuous decrease of the fluidity of fresh UHPC slurry (from 261 mm to 100 mm). When the bentonite content is 10.0%, the UHPC slurry has almost no fluidity (100 mm), which leads to the appearance of pores in the UHPC matrix and the decrease of compressive strength.

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Mechanical properties and meso-microscopic mechanism of basalt fiber-reinforced recycled aggregate concrete

Cited by 114 publications

References 49 publications

Effect of Recycled Aggregate and Slag as Substitutes for Natural Aggregate and Cement on the Properties of Concrete: A Review

Effect of Recycled Aggregate and Slag as Substitutes for Natural Aggregate and Cement on the Properties of Concrete: A Review

Macro-Mesoscale Mechanical Properties of Basalt-Polyvinyl Alcohol Hybrid Fiber-Reinforced Low-Heat Portland Cement Concrete

An ultra-high performance concrete incorporating viscosity-controlling agent: Fiber distribution and microstructure

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