·The compressive strength at 28 days did not show a significant decrease but still exhibited significant anisotropy the compressive strength in the Z direction being 25 % and 45 % higher than that in the X and Y directions respectively Basalt fibers have high tensile strength and excellent alkali resistance making them a good reinforcing
·The compressive strength of concrete with a 12 mm basalt fiber BF % admixture is MPa which is % higher than that of concrete without the fiber admixture The compressive strength was increased by and % compared to concrete containing 3 mm BF % and % BF 12 mm respectively
·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
·The compressive strength increased by about 10% at a fibers dose of 2% compared to the control mix However the further increase in BF dosage to % and 3% showed a negative impact on the compressive strength where the compressive strength dropped by about 12% and 21% respectively Several studies reported results for 12 mm long basalt
·At the beginning the effect of the FRP jacketing was not apparent due to the negligible lateral deformation of the core There is a transition zone that develops when compressive strength reaches a maximum value under applied stress When the stress strain curve reaches its maximum compressive strength confinement impact is more evident and
·The experimental test results of compressive strength and split tensile strength are showing on the table 3 against various volume fractions of basalt fibres such as 0% % 1% % 2% % and 3% against the age of curing 7 days and 28 days Fig 5 shows the 7 days compressive strength is having almost 55% to 64% of 28 days compressive strength for
This research analyzes the effects of polyacrylate emulsion and basalt fibers on the compressive strength and pore structure of iron tailings mortar Based on the varying impact of different pore size ranges on pore structure parameters the mortar pores are divided into three ranges and the sensitive pore size range for compressive strength
·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
·The above research mainly uses test methods to explore the compressive strength of basalt but the test methods are time consuming and labor intensive and the instrument materials are expensive To solve the limitations of experimental methods some scholars apply machine learning methods to concrete prediction [16] [17] [18]
·ξ uniaxial compressive strength of the intact rock pieces ξ value of the Hoek Brown constant for these intact rock pieces and ξ value of the Geological Strength Index GSI for the rock mass Fresh basalt chert diabase gneiss granite quartzite R5 ; Very strong 100 250 4 10 Specimen requires many blows of a geological
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