Effect Of Basalt Fiber Research Articles

Experimental Study on the Frost Resistance of Basalt Fiber Reinforced Concrete.

In this paper, the effect of basalt fiber (BF) on the frost resistance of concrete under different curing conditions was investigated, and its frost resistance mechanism was analyzed. Three different curing conditions (normal curing, short-term curing, and seawater curing) were adopted, and concrete with different BF volume contents was designed. Freeze-thaw (FT) tests were carried out using the rapid freezing method to test the frost resistance of basalt fiber reinforced concrete (BFRC). Additionally, the mass loss rate (MLR), relative dynamic modulus of elasticity (RDME) change, and compressive strength reduction of specimens during the freeze-thaw cycles (FTCs) were evaluated. The results show that when the BF content is 0.15%, under normal curing, short-term curing, and seawater curing conditions, the residual compressive strength of BFRC after FTCs was increased by 5.4%, 28.1%, and 30.9%, respectively, compared to plain concrete. By incorporating BF into concrete, the development of microcracks can be effectively retarded, and damage generation during FTCs can be reduced. In addition, the microscopic morphological characteristics and pore structure characteristics of concrete further elucidate the frost resistance mechanism of BFRC from a microscopic perspective.

Investigation of the effect of additives on the microstructure of clay

In civil engineering, some soils cause many problems in terms of geotechnical engineering. Especially high plasticity clayey soils cause serious problems in road, airport, pavement and highway construction. Such soils can be stabilized using the chemical stabilization method. Additives such as lime, cement, fly ash and blast furnace slag are generally used in chemical stabilization. In addition, in recent years, there have been many studies on the use of natural and artificial fibers in ground stabilization. In this study, the effects of basalt fiber and mineral additives on the microstructure of clay soil were examined. Microstructures of pure and additively mixed clayey soil specimens were investigated for this purpose. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses were performed on compacted soil specimens. In sum, it has been shown that the addition of lime, fly ash, and silica fume is effective in improving the compactivity properties. Pore sizes in SEM images vary depending on additive addition. SEM images showed that the soil particles adhered to the basalt fiber surface, which contributed to the force and friction between the soil particles and the basalt fiber.

Comparative performance evaluation of basalt fiber–modified hot in-place (HIP) recycling asphalt mixtures: site mixture versus lab mixture

The performance improvement of hot in-place recycling asphalt mixtures has been a hot topic recently due to the widespread application of HIP recycling technology. Based on the maintenance project of the provincial pavement G233 Baoying section, basalt fibers were introduced into HIP recycling mixtures. The effect of basalt fiber on the comprehensive performance of recycled mixtures was investigated using high temperature stability tests, cracking resistance tests, water stability tests, and dynamic modulus tests. Moreover, the performance of site mixtures was comparatively investigated with that of lab-made mixtures to further explore the site mixing effect on the mixture performance. The results showed that the recycled mixtures without basalt fiber presented unqualified cracking resistance even though proper mixture design was performed. The addition of basalt fibers could greatly enhance the rutting resistance, low-temperature cracking resistance, and stripping resistance of HIP recycled mixtures by 105.2%, 102.3%, and 46.9%, respectively. Moreover, the mixing method also had a significant impact on the properties of mixtures. The recycled mixtures produced by the site re-mixing method showed inferior performance compared to that of mixtures produced by the lab mixing method. Specifically, the dynamic stability, low temperature failure strain, and stripping point values reduced by 44.1%, 16.2%, and 11.7%, respectively, indicating that the site re-mixing process was not as effective as the lab mixing process due to the weaker blending and mixing procedures of the site equipment. The results could be beneficial for the utilization of basalt fiber in HIP recycling technology.

EFFECT OF BASALT FIBER ASPECT RATIO ON MECHANICAL AND WORKABILITY PROPERTIES OF SELF-COMPACTING CONCRETE

Self-compacting concrete (SCC) has become widely used thanks to its various advantages. SCC is also fiber reinforced, similar to conventional concrete. However, studies on SCC with fiber addition are limited. In this study, the effect of basalt fibers at different aspect ratios on the mechanical and workability properties of SCC was examined. Slump flow, V-funnel, compressive, flexural and splitting tensile strength tests were carried out within this study. Results showed that, although increasing the aspect ratio causes improvement in the workability properties of concrete, workability decreases compared to the reference SCC. Increases were observed in flexural and splitting tensile strengths with increasing aspect ratio. The compressive strength of the specimens that contains BF decreased compared to the reference sample because of the agglomeration effect. The results obtained were examined and discussed in detail.

Effect of Basalt Fiber on Electromagnetic Properties of Sulphoaluminate Cement

Effect of Basalt Fiber on Electromagnetic Properties of Sulphoaluminate Cement

INFLUENCE OF BASALT FIBRES ON THE PHYSICAL-MECHANICAL, PERFORMANCE AND DYNAMIC PROPERTIES OF RUBBER FOR RAIL PADS

The effect of basalt fibres on the rheometric, physical-mechanical, performance and dynamic (vibration absorbing) properties of rubber used for rail fastenings is investigated. The rubber mixture based on butadiene-methylstyrene (SKMS-30ARK), isoprene (SKI-3) and butadiene-nitrile (SKN 2655) caoutchoucs contained also vulcanising agents (sulphur, N,N'-dithiodimorpholine, tetramethylthiuram disulphide), vulcanisation accelerator (N-cyclohexyl-2-benzothiazole sulphenamide), vulcanisation activators (zinc oxide, stearic acid), softeners (industrial oil I-12A, rosin), antioxidants (N-phenyl-N'-isopropyl-para-phenylenediamine, wax ZV-P, acetonanil N), fillers (kaolin, carbon black of N 220 and P 514 grades, silicon dioxide Zeosil 1165 MP) and other ingredients. The strength properties and hardness of the vulcanisates are observed to increase with an increase in the content of basalt fibres in the rubber mixture. Basalt fibres reduce changes in the elastic-strength parameters of vulcanisates after daily thermal aging in air and under the action of the standard petroleum fluid SZhR-1. The improved dynamic (vibration damping) properties are exhibited by vulcanised rubber containing 12.0 phr basalt fibres.

Rheological and Mechanical Properties of Bentonite-Cement Paste Reinforced with Basalt Fibers.

Bentonite cement paste (BCP) is among the grouting materials used widely in large-pore grouting and karst cave treatment. The mechanical properties of bentonite cement paste (BCP) will be improved by additional basalt fibers (BF). In this study, the effects of basalt fiber (BF) contents and their lengths on the rheological and mechanical properties of bentonite cement paste (BCP) have been examined. Yield stress (YS), plastic viscosity (PV), unconfined compressive strength (UCS), and splitting tensile strength (STS) were used to evaluate the rheological and mechanical properties of basalt fiber-reinforced bentonite cement paste (BFBCP). Scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS) characterize microstructure development. The results indicate that the Bingham model can provide the rheological behavior of basalt fibers and bentonite cement paste (BFBCP). The yield stress (YS) and plastic viscosity (PV) increase as the content and length of basalt fiber (BF) increase. The effect of fiber content on yield stress (YS) and plastic viscosity (PV) is greater than that of fiber length. The addition of basalt fiber (BF) enhanced the unconfined compressive strength (UCS) and splitting tensile strength (STS) of basalt fiber-reinforced bentonite cement paste (BFBCP) at the optimum basalt fiber (BF) content of 0.6%. The optimum basalt fiber (BF) content tends to increase as curing age increases. The basalt fiber length of 9 mm is the most effective for improving unconfined compressive strength (UCS) and splitting tensile strength (STS). The large increments in unconfined compressive strength (UCS) and splitting tensile strength (STS) were 19.17% and 28.21% for the basalt fiber-reinforced bentonite cement paste (BFBCP), with a basalt fiber length of 9 mm and content of 0.6%. Scanning electron microscopy (SEM) shows that the randomly distributed basalt fiber (BF) forms a spatial network structure in basalt fiber-reinforced bentonite cement paste (BFBCP), which composes a stress system under the action of cementation. Basalt fibers (BF) used in crack generation processes slow down the flow through bridging and occur in the substrate to improve the mechanical properties of basalt fiber-reinforced bentonite cement paste (BFBCP).

A synopsis about the effect of basalt and natural fibers on geopolymer properties

Currently, the introducing of basalt and natural fibers into different geopolymer swift growth of geopolymers. Despite of geopolymers have good properties such as fire resistance, flame resistance, higher compressive strength and higher durability, they suffer from low tensile strength and flexural strength. Different types of fibers were used to increase flexural strength, tensile strength, fracture toughness and ductility of geopolymers. The current article goals to brief the available earlier studies focused on the effect of basalt fibers and different natural fibers on the properties of geopolymers.

Effect of basalt fiber on self-consolidating concrete with fly ash replacement

This work explores the behavior of self-compacted concrete produced with fly ash as cement supplementary material and basalt fibers. A combination of desert dune sand and finely crushed aggregates were used as fine aggregates; the dune sand served as sustainable material as it is a regional material and does not need further pre-processing before use. Further, a maximum size of 10 mm aggregate was used as coarse aggregate. Polycarboxylic ether-based superplasticizer was used at a constant dosage of 1.5% of the total cementitious materials to maintain the targeted flow value with the reduced water-to-cement ratio. The maximum replacement dosage of cement with fly ash was 40%, as most studies recommend this ratio without altering concrete behavior. Basalt-chopped fibers with different percentages ranging from 0.5% to 2% were used as an additive to the mix with the lowest strength results. Conclusions were drawn based on the interpretation and experimental assessment of the workability and strength properties of the concrete. Rheological properties results indicate an enhancement in workability could be attained with the increase of fly ash content; However, a tendency of segregation and loss of stability was observed after a certain threshold. In the meantime, basalt fibers showed an improvement in segregation resistance with loss of workability. The compressive strength results revealed that the optimal fly ash dosage was 20%, with a strength that is comparable to the control mix strength. Meanwhile, the mix with 40% of fly ash content showed a drop in strength of 18% from the control mix, which was regained after adding basalt fiber with an optimal dosage of 1% of the total binder content.

The Effect of Basalt Fiber on Concrete Performance under a Sulfate Attack Environment

To enhance the sulfate attack resistance performance of concrete, Sulfate erosion test was carried out on basalt fiber concrete with different contents, selecting a concentration of 5% sulfate solution and using a dry−wet cycle mechanism attack of basalt fiber-reinforced concrete (BFRC). Every 15 dry−wet cycles, the mass, compressive strength, splitting tensile strength, and relative dynamic elastic modulus of BFRC were tested, and the SO42− concentration was measured. This work demonstrates that the mass, relative dynamic elastic modulus, compressive and splitting tensile strength of BFRC reveal a trend of climb up and then decline with the process of the dry−wet cycle. Basalt fiber can enhance the sulfate corrosion resistance of concrete by delaying the erosion of concrete induced by SO42− and increasing the bearing and anti-deformation capacities of concrete by improving its internal structure. Additionally, when mixing 0.2% basalt fiber into concrete, the strength deterioration rate will be reduced when the peak values of splitting tensile and compressive strength appear at 60 and 75 times the alternating dry−wet cycles, respectively. Adverse effects will occur when the fiber volume fraction exceeds 0.2%. The research in this paper can provide a foundation for the engineering applications of basalt fiber concrete.

Effects of Basalt Fiber on Strength of Alkali-Activated Slag-Tailing Cement Bodies

The influences of different quantity of basalt fiber and lead–zinc tailings on the strength of alkali-activated slag-tailings cement bodies were studied. After adding basalt fiber, the uniaxial compressive strength of the 50 and 60 g per unit tailing cement bodies increased before decreasing throughout a 7-day curing period. During a 28-day curing period, the uniaxial compressive strength of the 50 g per unit tailings cement decreased gradually, while the uniaxial compressive strength of the 60 g per unit tailings cement increased first and then decreased. Furthermore, after adding basalt fiber, the flexural strength of the 50 g per unit tailings cement body decreased gradually during a 7-day curing period, while the 60 g per unit tailings cement increased first and then decreased. Under a 28-day curing period, the flexural strength decreased first and then increased for both cement bodies. Finally, At the confining pressures of 2, 4 and 6 Mpa, the increase amplitude of the triaxial compressive strength of the cementation body was different with the addition of basalt fiber. The increase amplitude of the triaxial confining pressure from 2 to 4 Mpa was higher than that of the triaxial compression from 4 to 6 Mpa.

Effect of basalt fibers on the mechanical and self-healing properties of expanded perlite solid-loaded microbial mortars

Microbial-induced calcium carbonate precipitation (MICP) is an environmentally friendly technology to repair cracks. In this study, expanded perlite was used to adsorb bacteria as a self-healing agent, and basalt fibers were used for the first time to enhance the healing effect of microbial mortar. The mechanical properties and impermeability of fiber-reinforced bacterial concrete were investigated, the macroscopic crack healing effect and the precipitation path of generates were observed by optical microscopy, and the coupling effect of fibers and bacteria was studied and revealed by microscopic experiments. It was shown that the addition of a self-healing agent made the self-healing performance of mortar significantly enhanced, and the incorporation of fibers enhanced the mechanical properties and impermeability of the mortar. The basalt fibers provided the location for calcium carbonate precipitation, and its bridging action provided the pathway for precipitation. The fibers offered the possibility of healing cracks larger than 300 μm in width.

Mechanical performance of basalt and PVA fiber reinforced hybrid-fiber engineered cementitious composite with superimposed basalt fiber content

• PVA/basalt HF-ECC with multiple cracking behavior was achieved by superimposition of basalt fiber. • Increasing basalt fiber superimposing content improved overall strength of PVA/basalt HF-ECC. • The advised optimal superimposing volume fraction of basalt fiber is 0.8%. • The effect of basalt fiber on tensile strain capacity was analyzed by micro-mechanical analysis. The large-scale application and popularity of engineered cementitious composites (ECC) is hindered by the relatively high price and increased CO 2 footprint of PVA fiber. PVA and basalt fiber reinforced hybrid-fiber ECC (PVA/basalt HF-ECC) is a promising way to deal with such drawbacks. Hence, this study focused on the influence of basalt fiber superimposing content on the properties of PVA/basalt HF-ECC. Compressive tests indicated basalt fiber could elevate compressive strength and its corresponding strain, the obtained maximum values were 46.37 MPa and 0.47 % as basalt fiber content increased up to 1.2 %. Tensile tests showed that first cracking strength and ultimate tensile strength increased up to 6.62 MPa and 7.85 MPa as basalt fiber content increased up to 1.2 %. Although tensile strain capacity continuously decreased to 0.62 %, all specimens showed multiple cracking behavior due to the superimposed performances derived from PVA and Basalt fibers. Mercury intrusion porosimetry test showed volume fraction of large capillary pore that influences strength decreased up to 31.65 % when basalt fiber content increased to 1.2 %. Based on test results, predicting equations of mechanical properties were proposed by curve fitting and showed good agreement with test results. Micro-mechanical analysis was conducted based on modified crack bridging model, and its results further interpreted change mechanism of tensile strain capacity. This study explores the feasibility of developing PVA/basalt HF-ECC by basalt fiber superimposition and facilitates the popularity of ECC.

Influence of Basalt Fiber on Mechanical Properties and Microstructure of Rubber Concrete

The utilization of waste rubber in concrete will reduce pollution and improve the efficiency of resource utilization. The effects of rubber particles and basalt fibers on the compressive strength and splitting tensile strength of concrete were investigated. In addition, the influence of basalt fibers on the mechanical properties and micropore structure of rubber concrete (RC) were analyzed using scanning electron microscopy (SEM) and X-ray computed tomography (CT). The distribution of rubber particles in concrete was also studied. The results indicate that the effects of basalts fibers on the mechanical properties of rubber concrete were significant. The rubber particles were evenly distributed in the concrete. Compared with normal concrete (NC), rubber concrete with 10% rubber particles had lower compressive strength and splitting tensile strength. Compared with rubber concrete, basalt fiber rubber concrete (BFRC) with 2% basalt fibers had no obvious effect on the compressive strength, while significantly improving the splitting tensile strength, refining the pores of rubber concrete, and reducing the porosity of the matrix. The effects of basalt fiber on the properties and pore distribution of RC should be considered in future applications.

Study on Pavement Performance of Cement Stabilized Recycled Brick Aggregate Base with Basalt Fiber

The solution to environmental problems caused by the generation of construction brick waste is its use as a substitute for natural gravel aggregate in highway base material. The preparation of basalt fiber cement stabilized recycled brick aggregate base material is by adding basalt fiber to cement stabilized recycled waste brick mixture. With the help of nonlateral compressive strength test, indirect tensile (splitting) strength test, and flexural tensile strength test, the influence of basalt fiber with different dosages on the compressive strength, crack resistance, and durability of cement stabilized recycled waste brick mixture was analyzed. The effects of basalt fiber on water loss rate, dry shrinkage strain, and frost resistance of cement stabilized recycled waste brick mixture were analyzed by dry shrinkage test and freeze-thaw test. The bonding morphology of fiber and cement slurry was studied by scanning electron microscopy. The results show that when the waste brick aggregate content is 30% and basalt fiber content is 1‰, the 28-day compressive strength of cement stabilized waste brick mixture is 19% higher than that of the specimen without fiber; indirect tensile strength increased by 36.6%; flexural strength increased by 37.0%; water loss rate decreased by 15.5%; the coherent shrinkage strain decreased by 30.3%; and BDR value (compressive strength loss percentage) increased by 12.3%. Basalt fiber and cement slurry have good bonding force and friction force, which act as tensile reinforcement in the mixture. Fiber bundle and fiber filament compose a fiber network to enwrap the mixture, so that the fiber network and mixture are embedded with each other, thereby improving the mechanical properties and durability of cement stabilized recycled waste brick mixture.

Effects of basalt fiber and polyvinyl alcohol fiber on the properties of recycled aggregate concrete and optimization of fiber contents

With the rapid economic development, a great quantity of concrete structures is facing dismantling and rebuilding. In this process, many recycled aggregates (RA) that will have an adverse effect on the environment will be produced. Fiber-reinforced RA concrete (RAC) (FRRAC) was prepared using single-incorporated basalt fiber (BF), single-incorporated polyvinyl alcohol fiber (PVAF), and double-incorporated BF with PVAF as micro-reinforced materials to improve the environment and the performance of RAC. The influence of fibers on the performance of RAC was analyzed on the basis of workability, mechanical properties and durability along with the desire function to achieve the multi-objective optimization of the comprehensive performance of FRRAC to obtain the optimal content of hybrid fibers. Results showed that the incorporation of fiber improved the mechanical performance and durability of RAC. The double-incorporated BF with PVAF could play an excellent coupling role, that is, BF and PVAF mainly improved the strength and toughness of RAC, respectively. The optimum contents of BF and PVAF for preparing unit volume FRRAC were 0.274% and 0.102%, respectively. This ratio could prepare FRRAC with compressive strength of 54.3 MPa, splitting tensile strength of 3.29 MPa, flexural strength of 3.67 MPa, compressive strength of 49.9 MPa after 200 freeze–thaw cycles and compressive strength of 50.7 MPa after 120 sulfate wetting–drying cycles.

Effect of basalt fiber on the thermal conductivity and wear resistance of sintered WC-based diamond composites

Tungsten carbide (WC)-based matrix powder, basalt fiber (BF) and diamond were used as raw materials to prepare WC-based diamond composites by hot-press sintering, and then the sintered samples were tested for thermal conductivity and wear resistance. The surface, fracture surface and wear surface of the samples were observed using scanning electron microscope (SEM), x-ray diffraction (XRD) and energy disperse spectroscopy (EDS). The results showed that the addition of BF significantly weakened the wear resistance of the diamond composites, and the abrasive ratio of the samples was reduced by 34.4% at 5% mass fraction BF addition compared to the samples without BF addition. At the same time, the addition of a moderate amount of BF increased the relative density of the matrix and reduced the number of pores in the matrix material. When 1 wt% BF was added, the WC-based diamond composite had the highest thermal conductivity, reducing the risk of possible thermal damage to the diamond.

Basalt fiber-reinforced foam concrete containing silica fume: An experimental study

Foam concrete refers to a type of low-density concrete that is commonly known to have favorable insulation and thermal performance due to its intentionally increased porosity. However, foam concrete is known to generally have a very low physico-mechanical and durability performance mainly due to its high porosity and the connectivity of the pores that can allow the entrance of unfavorable substances into the concrete medium. As a result, most often, foam concrete is considered inapplicable to major load bearing structural elements. To counter this tendency, this study adopted the use of basalt fibers with silica fume to increase the structural integrity of foam concrete. In that respect, 18 mixes with varying content of foaming agent, basalt fiber and silica fume have been prepared. Apparent porosity, water absorption, compressive, flexural and splitting tensile strength, sorptivity, ultrasonic pulse velocity (UPV), drying shrinkage, freeze–thaw, thermal conductivity, and thermal resistance tests were performed to evaluate the physico-mechanical, durability, and insulation properties of the produced foam concretes. Based on the results, a highly durable foam concrete with a maximum compressive, flexural and splitting tensile strength of ∼ 46, 6.9 and 3.07 MPa, respectively, has been developed. Furthermore, it is observed that the inclusion of silica fume can significantly influence the pore network and enhance fiber-paste matrix. The effect of basalt fiber, however, is found to be more dependent on the use of silica fume, potentially due to its low integration with cementitious paste. The results of this study are significant and point out to the great potential for producing a highly durable and lightweight insulating foam concrete through the use of basalt fiber and silica fume.

Development of basalt – fluoroplastic composites for technical purposes

The development of composites based on polytetrafluoroethylene (PTFE) for their use in friction units of technology in the Arctic climate is an urgent task of modern materials science. The active use of environmentally friendly fibers as reinforcement for composite materials instead of carbon and fiberglass can help reduce environmental problems. Moreover, from an economic point of view, natural fibers are in an advantageous position. In this work, the effect of basalt fiber on the tribotechnical properties and structure of polytetrafluoroethylene is investigated. As a result of the study, it was found that the characteristics of basalt fluorocarbon composites are approximately on par with composites with carbon fibers. Thus, basalt fiber can become a new cost-effective, and most importantly, an environmentally friendly replacement for traditional fibers.

The Effect of Basalt Fiber on Mechanical, Microstructural, and High-Temperature Properties of Fly Ash-Based and Basalt Powder Waste-Filled Sustainable Geopolymer Mortar

As the human population grows and technology advances, the demand for concrete and cement grows. However, it is critical to propose alternative ecologically suitable options to cement, the primary binder in concrete. Numerous researchers have recently concentrated their efforts on geopolymer mortars to accomplish this objective. The effects of basalt fiber (BF) on a geopolymer based on fly ash (FA) and basalt powder waste (BP) filled were studied in this research. The compressive and flexural strength, Charpy impact, and capillary water absorption tests were performed on produced samples after 28 days. Then, produced samples were exposed to the high-temperature test. Weight change, flexural strength, compressive strength, UPV, and microstructural tests of the specimens were performed after and before the effect of the high temperature. In addition, the results tests conducted on the specimens were compared after and before the high-temperature test. The findings indicated that BF had beneficial benefits, mainly when 1.2 percent BF was used. When the findings of samples containing 1.2 percent BF exposed to various temperatures were analyzed, it was revealed that it could increase compressive strength by up to 18 percent and flexural strength by up to 44 percent. In this study, the addition of BF to fly ash-based geopolymer samples improved the high-temperature resistance and mechanical properties.