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The effect of different curing regimes on the strength of geopolymerized GBFS was evaluated using scanning electron microscopy (SEM) and unconfined compressive strength (UCS) tests. The effect of both the temperature and duration of curing had a vital role in the strength development of the mixtures.
Dec 07, 2020· One of the parameters which affect the uniaxial compressive strength (UCS) of rock materials is the length to diameter ratio (L/D) of test cores. ASTM recommends a …
Table 2. Mean tensile strength and compressive strength for selected sedimentary rock types (after Johnson and Degraff, 1988). The behavior of intact rock in the post-peak dom ain is not a true rock property and is partially dependent on the stiffness of the loading system. A …
Mar 01, 2010· The results of the strength tests show that granite has the highest mean value of 101.67 MPa for Unconfined Compressive Strength (UCS) test, 6.43 MPa for Point Load test while dolomite has the least mean value of 30.56 MPa for UCS test and 0.95 MPa for Point Load test.
strength performance. The required long-term strength (in terms of unconfined compressive strength, UCS) and stability depend on different factors, such as stope geometry, mining method and CPB end-use application (waste disposal, pillar recovery, ground support, self-
The laboratory experiments reveal the uniaxial compressive strength value of collected ore sample 98.09 Mpa with elastic modules of 79.113 Mpa and 0.12 Poisson ratios in sample no. 18 shown the
Silica oxide (SiO2) and aluminium oxide (Al2O3) was 2.2.2 Unconfined Compressive Strength Test (UCS) measured by gravimetric method according to IS: 2720 (part- 25)-1982. Iron oxide (Fe2O3) was measured by colorimetric UCS test were conducted both on …
Uniaxial compressive strength (UCS) is a key physical test relevant to iron ore crusher design and rock geomechanics for mining. Tests are typically performed on intact lengths of NQ, HQ, or PQ diamond drill core and record the maximum axial load sustained at the point of failure.
(PLT) and unconfined compressive strength (UCS) which are key parameters in slope stability design. The data was interrogated using state-of-the-art data visualisation and statistical software appropriately chosen based on the size of the samples and nature of the distribution. This research follows on from recommendations
3.6 Unconfined Compressive Strength (UCS) The results of UCS test with different curing period are shown in Table -5. For control sample UCS strength is about 17.22 kPa.
a by product from the smelting of iron ore. Additive sample of the combined fine aggregates prior to mixing in of any additives, shall not be less than 60. content required to satisfy the Unconfined Compressive Strength (UCS) requirements specified in Table 815.101. Regardless of the target grading selected, the production grading shall
Jan 21, 2015· UCS-Unconfined Compressive Strength (MPa) 163.12 203.8 1 CWi-Bond Impact Crushing Work Index (kWh/t) 9.09 11.4 2 SMC-SAG Mill Comminution (kWh/m3) 10.19 10.8 3 Ai-Bond Abrasion Index 0.32 0.17 4 BWi-Bond Ball Mill Work Index (kWh/t) 19.4 19.9 5 Notes: 1. The UCS results indicated that the samples range from strong to very strong. 2.
unconfined compressive strength iron ore What is the compressive strength of iron ore Answers Iron ore is a catch-all name that covers a variety of different ores of iron Compressive strength, depending on the particular ore, can be from, say, 7MPa or even so small that the ore falls apart before it can be measured, up to 680MPa and beyond
Jan 01, 2019· On the strength of unconfined compressed specimens compacted with the mixture containing the optimum levels of iron ore tailings (60f-40c mixture), when added 5% of cement in the dry unit weight of the material and cured for 7 days in a humid chamber, it was observed that it was not possible to reach the minimum strength, 2.1 MPa, required to
to determine compressive strength of ore. lithium ore compressive strengthlaerchenrain . Rock samples of iron ore granite and gneiss were collected from the Ajabanoko iron ore deposit and tested in the laboratory to determine engineering properties such as uniaxial compressive strength (UCS) tensile strength unit weight friction angle cohesion bulk density and porosity.
2.2.2 Unconfined Compressive Strength Test (UCS) UCS test were conducted both on TM as well as blended TM. After mixing with additives in different proportions the UCS specimens were cured for 7 days, 28 days and 90 days. All the test specimens were compacted to maximum dry density (γdmax) and optimum moisture content (wopt). The values of
Table 11Laboratory Test Results * siderite, hematite, goethite, limonite.Rock Unit Recrystallized Limestone Ore* Quartzite Unconfined compressive strength-UCS (MPa) 61.9 17.9 24.4 Young modulus-E (GPa) 12.99 6.91 7.99 Poisson ratio-ν (MPa) 0.11 0.17 0.38 Cohesion-c (MPa) 2.83 1.59 1.56 Internal friction angle-φ ( o ) 49.7 38.1 37.6 Tensile
the Point load Test (PLT) for point compression breakage, the Unconfined Compressive Strength (UCS) system for surface compression breakage, and the Bond mill which is used to determine rod or ball work indices (BWi) for ore resistance to abrasion breakage. The various types of rock strength equipment are shown in Figure 5.
The effectiveness of S/S was assessed by comparing laboratory experimental values obtained from unconfined compressive strength (UCS), hydraulic conductivity and leaching propensity tests of S/S samples with regulatory standards for safe surface disposal of such wastes.
Apr 09, 2015· 3.6 Unconfined Compressive Strength (UCS) The results of UCS test with different curing period are shown in Table -5. For control sample UCS strength is about 17.22 kPa.
the Full Text Article in PDF format unconfined compressive strength (UCS) were found to correlate to well, but joint spacing and joint conditions appear to correlate poorly to RQD and UCS. rock mass. In this paper, the correlation analyses between the deformation modulus.
apply the load at a compression rate of 180 mm/min. 3. Results and discussion 3.1.1. Strength of concrete with a w/b ratio of 0.5 One-day compressive strength at a w/b ratio of 0.5 for each of the concrete mixes is summarised in Fig.1. Fig.1. 1-day compressive strength; w/b. Each data set is the average of three test results.
Unconfined Compressive Strength Test Uta. Definitions Objectives and Applications Objective To determine the unconfined compressive strength q u of the soil Significance A quick test to obtain the shear strength parameters of cohesive fine grained soils either in undisturbed or remolded state The test is not applicable to cohesionless or coarse grained soils The test is strain controlled and
Unconfined compressive strength (UCS), CBR (soaked and unsoaked condition) and resistance to loss in strength of specimen yielded peak values at 8% lime/8% IOT treatment. Microanalysis using scanning electron microscope (SEM) revealed that crystalline hydration products present in the optimally treated black cotton soil majorly contributed to
The effectiveness of S/S was assessed by comparing laboratory experimental values obtained from unconfined compressive strength (UCS), hydraulic conductivity and leaching propensity tests of S/S samples with regulatory standards for safe surface disposal of such wastes.
Jan 01, 2018· The unconfined compressive strength (UCS) of cast 6×12-inch QA/QC cylinders is typically used as an index test to track the performance of a backfill plant. However, these strengths need to be adjusted for oversize aggregate removal and sample size effects if used to estimate the emplaced UCS.
Unconﬁned compressive strength: The unconﬁned compressive strength (UCS) tests were carried out on the natural and treated soil samples compacted at their OMCs using BSL energy as described above in accordance with BS 1377. Cylindrical specimens with a diameter of 38 mm and a length
The production of the major mineral ore i.e. iron ore, in 1990 was 14 million tones. The ore to overburden ratio (UCS) Unconfined compressive strength increases as the cement in figure1. UCS increases as cement content increases. Sample cured inside the water attains lesser strength than the cured with wax in 7 days. UCS increases with
Performance Studies on Unconfined Compressive Strength of Fly Ash Mixed Expansive Soil Reinforced With Nylon Fibers combination of fly ash and fiber content for maximum gain in strength. Keywords - UCS, Nylon fibre, Fly ash iron ore tailings, paper sludge etc., utilizing wast es will reach optimum economic advantages if they exhibit
The unconfined compressive strength (UCS) is probably the most used of the rock index properties for their characterization. So all the standards have detailed regulations on the test and many authors have published on the effect of the sample size on the results of the test. The standards detail also the
Aug 11, 2016· Also, the minimum recommended unconfined compressive strength for reusability of treated waste material is 345 kPa (U.S. EPA, 1986).
compressive strength (UCS) test and triaxial compressive strength (TCS) test on the seaﬂoor massive sulﬁdes (SMS) samples from three di erent segments are conducted to obtain the key mechanical properties, including the cohesive force, internal friction angle, compressive strength, elastic modulus and Poisson’s ratio.
Due to economical and environmental issues, utilization of mineral wastes, e.g. iron ore mine tailing (IOMT), as road materials can be recommended as a sustainable alternative. In the present study, mechanical properties, as well as resistance to freezing and thawing cycles (F-T) of low plasticity clay soil stabilized with different percentages of Portland cement (0, 6, 9, 12 and 15%) and