Experimental study on the effect of basalt fiber reinforced …

The density of the specimens with added basalt fibers is 1.113 g/cm 3 (3 mm), 1.118 g/cm 3 (9 mm), and 1.120 g/cm 3 (12 mm); and the compressive strength is 7.03 MPa (3 mm), 7.07 MPa (9 mm), and 8.63 MPa (12 mm). The compressive strength exhibited by the lightweight concrete was higher when the basalt fibers were longer (12 mm).

Mechanical Characterization of Compact Basalt by Using …

In the present work, dynamic stress-strain response of compact basalt is tested under high loading rates using 38 mm split Hopkinson pressure bar (SHPB) device. The physical and static mechanical properties of compact basalt, e.g., density, specific gravity, static compressive strength and elastic modulus values are also determined. Petrological studies of …

Modeling strength characteristics of basalt fiber reinforced …

The study concludes with the development of a "user-friendly computer application" which enables quick strength prediction of basalt fiber reinforced concrete (BFRC). This study investigated ...

Mechanical behaviour of basalt fibre reinforced concrete: An

From outcomes, it can be concluded that the percentage of basalt fibres increases, the tensile strength of concrete is enhanced. The tensile strength of basalt fibre concrete depends on the quantity of fibres and dispersion fibres. Download: Download high-res image (64KB) Download: Download full-size image; Fig. 6. Split tensile strength of ...

STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES

Alkali-activated basalt powder/slag systems: compressive strength …

This study investigates the potential use of basalt powder as a sole precursor or blended in high amounts in slag-based alkali-activated systems. Eight alkali-activated mixes are prepared and comprehensively analyzed to determine the compressive strength development and microstructural characterization of basalt powder-based and basalt powder/slag blends …

Rock mass properties

Strength (MPa) Point Load Index (MPa) Field estimate of strength Examples R6 . Extremely. Strong > 250 >10: Specimen can only be : chipped with a : geological hammer: Fresh basalt, chert, diabase, gneiss, granite, quartzite R5 ; Very: strong: 100 -250 4 -10 Specimen requires many blows of a geological : hammer to fracture it: Amphibolite ...

EFFICACY OF BASALT AND GRANITE AS COARSE …

Compressive strength for basalt 36.39N/mm2 while 37.16N/mm2 for granite. 24.81N/mm2 tensile strength for basalt while 12.57N/mm2 for granite, 31.83N/mm2 flexural strength for basalt while 27.97N ...

Shear strength characteristics of basalt fiber-reinforced …

Shear strength characteristics of basalt ber‑reinforced loess Chong‑kun Chen1, Gang Li1*, Jia Liu2, Yu Xi1 & Jing‑jing Nan1 Loess owns the characteristics of collapsibility, disintegration ...

Properties of Basalt | Physical | Thermal

Hardness and Strength of Basalt. The physical properties of Basalt depend on its formation. Physical properties of rocks play an important role in determining its applications in various fields. Rocks are rated on the on the Moh's Hardness Scale which rates the rocks on the scale from 1 to 10. Rocks with hardness 1-3 are soft rocks from 3-6 are ...

Alkali-activated basalt powder/slag systems: …

strength values, ranging between 2 and 9 MPa, basalt powder/slag blend mixes exhibit a moderate compres-sive strength, i.e., 20 MPa at 28 days. Furthermore, sodium-silicate-activated basalt powder/slag blend mixes achieve high compressive strengths at early and further ages. The low strength values of the basalt

Mechanical performances and micro-level properties of …

Compressive test results showed basalt fiber could increase compressive strength at elevated temperatures. The optimal basalt fiber volume fraction was 0.8%, …

Recent advances in basalt-fiber-reinforced composites: …

They concluded that improvement in first crack strength of the basalt minibars (0.65 mm diameter, 43 mm length) at a dosage of 20 kg/m 3 was comparable to that of hooked steel fibers (0.9 mm diameter, 38 mm length) at 40 kg/m 3. Minibars also improved the post-cracking response of a concrete structure by improving its ductile post-cracking ...

Uniaxial Compressive Strength

The uniaxial compressive strength test is used to determine the maximum value of stress obtained before failure. The determination of this parameter was carried out on specimens with dimensions 7 × 7 × 7 cm along two orthogonal directions (side A–side C), in order to identify possible anisotropies which were not identified by the test of water absorption by capillarity …

Experimental Study on Unconfined Compressive Strength of Basalt …

In addition, the mechanical properties like the tensile strength and elastic modulus of basalt fiber are significantly higher than those of polypropylene fiber. Now, there are many studies of modified concrete, in which the basalt fiber is applied as the admixture, but the outcomes of basalt fiber applied to the clay soil are relatively few. ...

Geotechnical Evaluation of Basalt Rocks: A Review …

Compressive, T ensile strength and RMR v alues of foundation rocks, Karjan dam Fig.9. Pre and Post curtain grouting results of the Karjan dam spillway blocks foundations

Mechanical properties and microstructure of basalt fibre and …

The relative residual splitting tensile strength increases as the basalt fibre content increases. Nano-silica is generally beneficial to the improvement of the compressive strength at different temperatures. The results indicate that basalt fibre and nano-silica contribute to the improvement of the interface transition zone performance and to ...

Uniaxial compressive strength ( c) and deformation …

Uniaxial compressive strength ( ... Basalt 145 50 347 25 207 82 395 3 (17) Diabase, dolerite 229 88 384 13 152 81 537 5 15.2 Hyperite - - - - 245 108 441 2 ure Graywacke 81 25 310 12 - …

Experimental Investigations on Basalt Fibre-Reinforced …

Fibres are used in concrete to improve its structural integrity. Nowadays, among all basalt fibres, an inert mineral fibre is gaining more importance due to its exceptional properties, which include resistance to corrosion and low thermal conductivity. It also improves tensile strength, flexural strength and toughness of concrete. It can be used to extend the life of …

Experimental study on mechanical properties of basalt fiber …

Fiber reinforcement technology can significantly improve the mechanical properties of soil and has been increasingly applied in geotechnical engineering. Basalt fiber is a new kind of environment-friendly and high-performance soil reinforcement material, and the mechanical properties of basalt fiber-reinforced soil have become a hot research topic. In this paper, we …

Empirical models for compressive and tensile strength …

and tensile strength of basalt ber reinforced concrete Muhammad Asghar1, Muhammad Faisal Javed2, M. Ijaz Khan3,4,5*, Sherzod Abdullaev6,7, Fuad A. Awwad8 & Emad A. A. Ismail8

Research progress on properties of basalt fiber-reinforced …

The bonding strength of the fiber–cement interface is the foundation for the reinforcement effect, and the addition of ordinary fibers introduces new microscopic interfaces, which increase the porosity and reduce the durability of concrete [23], [24], [25].Basalt fiber is highly compatible with concrete, and its interface is filled with hydration products, which …

Flexural and split tensile strength of concrete with basalt …

The tables likely display the different percentages of BF used in the experiments and the corresponding strength values. For flexural strength, the highest increase was observed with 0.4 % BF content, resulting in a value of 5.11 MPa. This represents a significant increase of 15.35 % compared to the control mix.

Uniaxial compressive strength ( c) and deformation …

Uniaxial compressive strength ( ... Basalt 145 50 347 25 207 82 395 3 (17) Diabase, dolerite 229 88 384 13 152 81 537 5 15.2 Hyperite - - - - 245 108 441 2 ure Graywacke 81 25 310 12 - - - - Sandstone 109 28 257 95 147 28 189 5 18.8 Siltstone 89 31 350 14 - - - - 9.6 ...

Estimating uniaxial compressive strength of rocks using …

Porosity is a significant physical feature of rocks due to water absorption that causes decrease in the strength. The basalt of the study area can be described as "highly porous" and ignimbrite as "extremely porous" according to the classification by Anon (1979).The average UCS of basalt is determined as 26.65 MPa.For the ignimbrite, the lowest UCS is …

Geomechanical rock properties of a basaltic volcano

Overall, axial compressive strength for Pacaya basalt ranges widely from 12 to 174 MPa (Table 3), with the lower end falling into strength categories as low as chalk . Given that the porosity of the rocks scales with permeability, we chose to assess the relationship of UCS with permeability, as this measures the strong control that cracks have ...

Mechanical Properties of Basalt Specimens Under Combined Compression

The strength of the basalt specimen decreases noticeably from its uniaxial compressive strength if the specimen inclination angle changes from 0° to 15°. The empirical pillar strength formulae derived from vertical pillars cases may be inapplicable to inclined pillars even if the coal seam or orebody is thought to be sub-horizontal (having a ...

Basalt Rock Properties and Uses

The rock hardness of basalt is 6 on the Mohs scale, and can be seen through a combination of its compressive strength: 100-300 Mpa (Megapascal), its tensile strength: 10-30 Mpa, and its shear strength: 20-60 Mpa, which denotes that depending on the mineral makeup, basalt rocks fall in the strong – very strong category.

Compressive stress–strain relationship and its variability of basalt …

For instance, studies 6–8 have compared the physical and mechanical properties of RCAs and recycled fine aggregates (RFAs) produced by different crushers, examining parameters such as bulk density, water absorption, crushing value, and Los Angeles abrasion. Other research 9–13 has explored how the compressive strength, elastic modulus, tensile strength, creep …

Studies on strength properties of basalt fibre reinforced …

For conventional concrete, the compressive strength of 28 days is 7.24 times the split tensile strength. If basalt fibre is added to 0.5% and 1% in volume fraction, the compressive strength has 6.98 times and 6.69 times the split tensile strength respectively. This ensures that, the tensile strength of the concrete is getting improved because ...