detected, along with a reduction of compressive strength (118.25 MPa to 78.55 MPa) and point load index (5.62 MN/m² to 3.73 MN/m²) [6]. In other studies, Benvie carried out a
It is evident that from the comparison of CFJ2B3 and CFJ2B2, the CFJ2B3 is showing only a marginal increase of 7.3 % with respect to CFJ2B2 in compressive strength by introducing an additional basalt layer. Thus, from an economical and performance perspective, CFJ2B2 wrapping was selected as the optimum for further analysis.
clastic kimberlite (VK) and hypabyssal kimberlite (HK), and granite samples were studied. Some important physical properties of the rock samples were measured including rock quality designation
The dynamic compressive strength factor for the granite was less than 1; for the basalt, 1.35; for the limestone, 1.52; and for the tuff, 1.7^-« The compressional wave velocity of
A study of strength and deformation measurements for basaltic rocks, along with consideration of the influence of fracturing using a rock mass classification system, documents the range of brittle response for basaltic rock masses. Although basalts vary widely in composition and other physical factors, many of the properties of a basaltic rock mass appear to vary within a factor of about …
Basalt was used as an ornamental stone in many historic and ancient cities in Jordan. Measuring the uniaxial compressive strength (UCS) and the tangent Young's modulus (E t) in the laboratory ...
When investigating the strengths of basalt, norite, and granite samples subjected to various MW power levels and exposure times, they discovered that increasing the power level …
Compressive Strength Of Kimberlite And Basalt. 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
Kimberlite residues are rich in Mg 2+ present in olivine (forsterite), lizardite, ... (3.2 cm diameter) and sandpaper. Unconfined compressive strength (UCS) tests were performed in accordance with ASTM C109 (ASTM ... despite these minerals being typical of basalt-rich Group-1 kimberlites (Becker and Le Roex, 2006). Trace phases identified ...
Compressive strength prediction of Basalt Fiber Reinforced Concrete (BFRC), an advanced building material that combines performance and sustainability, is a complex task influenced by many factors. In this study, the compressive strength of BFRC is predicted using four tuned machine learning models, namely, Support Vector Machine (SVR), Random Forest …
compressive strength (CS) and tensile strength (TS) of basalt ber reinforced concrete (BFRC), this study will develop empirical models using gene expression programming (GEP), Articial Neural
The results illustrate that no-fiber columns sustain more than 50 % of the failure load before cracking, while this percentage raised to 75 % upon adding basalt fiber to concrete. 0.3 % of basalt ...
Increasing the content of basalt fibers to a certain extent can enhance the compressive strength of RAC, but it also significantly increases the variability of material performance. Additionally, the minimum compressive strengths of these three sets of specimens are 19.3, 19.7, and 21.0 MPa, respectively, indicating that the influence of fiber ...
At Koala, a relationship between moisture content, dry density and material strength was used to develop robust analysis and design tools, including a predictive, three-dimensional model of …
The commercial uses of Kimberlite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo) …
After the sulfate erosion test, the compressive strength of OC and BFRC was obtained through the standard compressive strength test according to the Standard Test Method for Mechanical Properties of Ordinary Concrete (GB/T 50081–2021) [23]. A total of 160 specimens were tested by YAW-300 electro-hydraulic servo pressure test machine.
With an increase in basalt fiber content (fig. 3) from 1 to 4%, the compressive strength increases from 42 to 83%, respectively. At the same time, there has been no significant increase in compressive strength during fiber reinforcement with polypropylene fiber. Fig. 3.
resulted in a general decrease in the 28-day compressive strength of the various concretes. The fine kimberlite tailings have a more profound effect of reducing the compressive strength than the coarse kimberlite tailings (see F igure 4). This trend agrees with the water demand of the kimberlite tailings observed during the slump tests. This
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 compressive strength decreases significantly in the range of 400–600 °C, and the decrease range is mostly between 40% and 60% ...
Otieno et al. used kimberlite tailings as aggregates in concrete and suggested that the addition of kimberlite tailings reduced the compressive strength and durability of concrete, ... The compressive strength of GT30 was 12.68% higher than that of GT00. The strength of the specimen had the minimum value when GT replacement rate was (the ...
Keywords: Basalt, Regression analysis, Point load strength index, Uniaxial compressive strength Introduction Uniaxial compressive strength (UCS) is an important property of rock. Uniaxial ...
The test results show that both the unconfined compressive strength (UCS) and splitting tensile strength (STS) at a given basalt fiber content increase significantly with increasing calcite content, whereas the axial strain of the peak …
Compressive strength is an essential property in structural materials, for example, mortar, which comprises the interacial transtition zone in concrete, stone, and steel, since material design is normally evaluated in terms of the risk of compression failure. In addition the CBM is known as having strength for compression force. Therefore plenty of standard tests exist to measure the ...
It was found that the compressive strength of concrete with basalt fibers (1–4 percent) decreased in the range of ... [Show full abstract] 9.71–18.62 percent for M25. To predict the ...
The cube compressive strength and axial compressive strength of the specimens decreased with the increase of temperature. With the same replacement ratio and fiber dosage, increasing the temperature from 300 °C to 600 °C, the decrease in cube compressive strength and axial compressive strength was the most significant, which was between 36.4 ...
In particular, the Uniaxial Compressive Strength is re-calculated as: σ c = σ UCS / (0.88 + 0.222*(D/L) ) Where σ c is the corrected uniaxial compressive strength. Rock characterization and typical range of UCS based on rock types . Based on their Uniaxial Compressive Strength, rocks can be characterized from very weak to very strong as ...
The results indicate that the mechanical properties including unconfined compressive strength (UCS) and Brazilian tensile strength (BTS) were significantly dropped as a result of MW irradiation.
data, comprising uniaxial compressive strength measurements, spacing, orientation and condition of discon-tinuities is used for rock mass characterization and slope stability analysis. Detailed …
Various authors have compiled the values of the unconfined compressive strength for different rock types (Balmer, 1953; Johnson and DeGraff, 1988; Hatheway and Kiersch, 1989; …
The optimal percentage of BF for compressive strength was 1.2. The compressive strength was significantly improved by adding 1.2% of BF. In fact, the improvement in compressive strength of High-Performance Concrete was due to the incorporation of BF and cement matrix at the microscopic scale.
Tensile Strength (MPa) 240-900 Elongation at break (%) 15-18 Acid/Alkali resistance High 2. Experimental: 2.1 Materials: In this study two mixes M25 and M20 had been studied with basalt ...
Axial compressive behavior of basalt and carbon FRP-confined coal gangue concrete. Author links open overlay panel Linli Yu a b, Junwu Xia a c, Ze Xia a, Jixin Gu a, Hang Xu a, Yujing Wang a b. ... The compressive strength and elastic modulus of the unconfined CGC30 were reduced by 9.84% and 25.65%, respectively, whereas the axial strain at the ...
The strength properties of basalt fiber-reinforced biocemented (BFRB) sand specimens with various calcite contents and fiber contents are investigated through a series of unconfined compressive ...
By studying the impact of the length and volume fraction of basalt fiber on the compressive and flexural strength test under three different lengths and three different dosages, Iyer et al. have further claimed that the optimal length, diameter, and volume fraction under compression and moment of resistance are 36 mm, 16 μm, and 18 kg/m 3 ...
Microwave energy can be used to assist mechanical rock breakage for civil and mining engineering operations. To assess the industrial applicability of this technology, microwave heating of basalt specimens in a multi-mode cavity (a microwave chamber) at different power levels was followed by conventional mechanical strength and fragmentation effect tests in the …
This study examines the compressive strength of two concrete mixes (M25 and M20) enhanced with basalt fiber and polypropylene fiber. The experiment investigates the impact of each fiber ...
Introduction. Basalt fibers (BF) are produced from the basalt rocks which are formed because of volcanic lava solidification. BF are abundantly found on earth due to their volcanic origin 1, 2.BF have higher viscosity and resistivity of temperature shifts from low to high which ascribes higher Compressive Strength (CS) and durability 1.Micrograph Analysis show that BF have good …
The heating of rocks with low to medium microwave absorption strength and its dependence on the water content is investigated in a 3 kW microwave oven at 2.45 GHz. Sandstone, granite, and basalt are chosen as the rock materials where basalt has the relatively highest absorption strength in the dry state. The effect of the microwaves at low energy input …
Basalt fiber is a promising reinforcement agent for loess engineering. In this study, unconfined compressive tests facilitated with the digital image correlation (3D-DIC) method were carried out on basalt fiber–reinforced loess to obtain the deformation images and surface strain fields at different loading moments. The reinforcement mechanism of samples with different …