Experimental and analytical study of hybrid fiber reinforced concrete prepared with basalt fiber under high temperature

2021 ◽  
Author(s):  
Mehran Khan ◽  
Mingli Cao ◽  
Xie Chaopeng ◽  
Majid Ali
Keyword(s):  
Reinforced Concrete ◽  
High Temperature ◽  
Analytical Study ◽  
Basalt Fiber ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Hybrid Fiber

scholarly journals Development of hybrid steel-basalt fiber reinforced concrete – in aspects of flexure, fracture and microstructure

2021 ◽  
Vol 20 (1) ◽  
pp. 62-90
Author(s):  
J. Vinotha Jenifer ◽  
◽  
D. Brindha ◽  
Keyword(s):  
Reinforced Concrete ◽  
Coarse Aggregate ◽  
Volume Fraction ◽  
Basalt Fiber ◽  
Copper Slag ◽  
Fiber Reinforced Concrete ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Fiber Reinforced ◽  
Hybrid Fiber

The conventional concrete is considered to be critical in various constructional applications due to its setbacks such as service load failures, brittle property, low ductility and low tensile capacity. Apart from the natural bridging mechanism (aggregate bridging), an additional bridging mechanism is necessary to overcome the existing setbacks in plain cement concrete. Thus concrete with one or more types of fibers in suitable combinations can augment the mechanical performance of concrete causing a positive synergy effect. Along with the two control mixes with and without copper slag as partial replacement of fine aggregate, two different groups of hybrid combination of fibers such as steel and basalt were cast with 3 different groups of coarse aggregate proportions of sizes 20 mm and 12.5 mm. The hybridization of fibers is assessed in this study under compression, tension, flexure and fracture. Stress-strain data were recorded under compression to validate the strain capacity of the mixtures. The mechanical properties were analyzed for the positive hybrid effect and the influencing factors were copper slag, hybrid fiber combination and coarse aggregate proportions. The optimum volume fraction of fibers and mix proportions were highlighted based on various behaviors of concrete. Steel as macro fibers and basalt as microfibers were examined under microstructural studies (SEM and EDX). The results from the flexural toughness showcased the potential of hybrid fibers with greater energy absorption capacity ensuring the ductile property of the proposed hybrid fiber reinforced concrete.

The Carbonized Life of Fiber Reinforced Concrete Nuclear Waste Storage Containers

2013 ◽  
Vol 671-674 ◽  
pp. 1936-1940
Author(s):  
Lu Zhang ◽  
Wen Zhao ◽  
Yi Li ◽  
Yong Ping Guan
Keyword(s):  
Reinforced Concrete ◽  
Nuclear Waste ◽  
Basalt Fiber ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Carbonation Depth ◽  
Nuclear Waste Storage ◽  
Storage Container ◽  
Ordinary Concrete

The hybrid fiber reinforced concrete containers for keeping nuclear waste (NWSC) were made by the concrete which mixed polypropylene fibers (0.9kg/m3) and 20mm basalt fiber (2.5kg/m3). The carbonation depth model was established by analyzing carbonation depth of ordinary concrete and hybrid fiber reinforced concrete that through the accelerated carbonization testing. And then two kinds of different concrete NWSC carbonation life were predict according to the similarity theory. The results show that the carbonation life of hybrid fiber reinforced concrete NWSC is 67％ higher than ordinary concrete ones, The addition of fiber can improve the resistance ability of concrete. The hybrid fiber reinforced concrete storage container can meet the requirements of the service life-300a when the thickness of the protective layer is more than 32mm.

scholarly journals Mechanical Properties and Design of Concrete with Hybrid Steel and Basalt Fiber

2021 ◽  
Vol 264 ◽  
pp. 02030
Author(s):  
Leonid Dvorkin ◽  
Oleh Bordiuzhenko ◽  
Vadim Zhitkovsky ◽  
Svyatoslav Gomon ◽  
Sviatoslav Homon
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Concrete Strength ◽  
Basalt Fiber ◽  
Fiber Reinforcement ◽  
Fiber Reinforced Concrete ◽  
Fiber Types ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Fine Grained

Adding different fiber types may yield improvement of steel fiber reinforced concrete (SFRC) features. Therefore, the investigation of hybrid fiber reinforced concrete (HFRC) mechanical properties is relevant. The effect of adding hybrid steel and basalt fiber on the mechanical properties of fine-grained concrete is studied. It is shown that hybrid fiber reinforcement using optimal steel and basalt fiber ratio allows preventing concrete mixtures' segregation and improving their structure homogeneity. This, in turn, allows achieving higher concrete strength values. In most cases, the design of such concrete compositions is based on engineering experience that limits the designers' capabilities. Therefore, an effective methodology for proper HFRC composition design should be developed. The present study is focused on developing such a methodology. The developed methodology includes using the mathematical experiments planning method to design optimal composition of high-strength fine-grained fiber reinforced concrete with hybrid steel and basalt fiber reinforcement. It is demonstrated that the proposed method can be effectively used for the design of optimal compositions of HFRC.

Splitting Strength of Hybrid Fiber Reinforced Concrete after Exposure to Elevated Temperatures

2011 ◽  
Vol 71-78 ◽  
pp. 1695-1702 ◽  
Author(s):  
Han Li ◽  
Dan Ying Gao
Keyword(s):  
Reinforced Concrete ◽  
High Temperature ◽  
Elevated Temperatures ◽  
Steel Fiber ◽  
Strength Loss ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Significant Deterioration ◽  
Splitting Strength

Experiments were carried out to investigate the splitting properties of hybrid fiber reinforced concrete after exposure to elevated temperatures. Based on the experimental observation, the effect of steel fiber dosage, polypropylene (PP) fiber dosage and strength grade of concrete on the residual splitting strength of the concrete after being subjected to high temperature was systematically analyzed. Test data indicated that high temperature caused significant deterioration in the splitting strength of concrete; the addition of PP fiber and steel fiber could all effectively improve the residual splitting properties of concrete; the optimum amount of PP fiber and steel fiber were identified respectively; the degree of strength loss of concrete with different strength grades was very close to each other. A theoretical equation was proposed to predict the residual splitting strength of concrete after being heated to temperatures up to 800°C.

scholarly journals A review on hybrid fiber reinforced concrete pavements technology

2021 ◽  
Vol 1895 (1) ◽  
pp. 012053
Author(s):  
Hadeel M. Shakir ◽  
Ahmed Farhan Al-Tameemi ◽  
Adel A. Al-Azzawi
Keyword(s):  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Concrete Pavements ◽  
Fiber Reinforced ◽  
Hybrid Fiber
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