What is the purpose of the Unconfined Compression test?
5.1 The primary purpose of the unconfined compression test is to quickly obtain a measure of compressive strength for those soils that possess sufficient cohesion to permit testing in the unconfined state.
How is UCS rock calculated?
(a) The uniaxial compressive strength of the specimen shall be calculated by dividing the maximum load car- ried by the specimen during the test, by the original cross-sectional area.
Why UCS test is done?
The Unconfined Compression Test is a laboratory test used to derive the Unconfirmed Compressive Strength (UCS) of a rock specimen. Unconfirmed Compressive Strength (UCS) stands for the maximum axial compressive stress that a specimen can bear under zero confining stress.
Is 50 converted to UCS?
Hassani et al. [9] performed the point load test on large specimens and revised the size correlation chart commonly used to reference point load values from cores with differing diameters to the standard size of 50 mm. With this new correction, they found the ratio of UCS to Is(50) to be approximately 29.
What is Pointload strength index?
Abstract. Point-load strength (Is) as a measure for the determination of rock strength and for estimating uniaxial (unconfined) compressive strength (UCS) are described and both put together and used for rock strength classification of brittle and hard rocks.
Is code for point load index?
1.1 This standard lays down the procedurefor determination of diametral and axial point load strength index of rock cores, cut blocks or irregular lumps, which may be tested without any treatment. 1.2 The testing may be carried out either in the laboratoryor in field at the drilling site.
Is Rqd a code?
on a modified core recovery procedure, which in turn, is based indirectly on the number of fractures and the amount of softening or alteration in the rock mass as observed in the rock cores from a drill hole. RQD shall be based on IS : 11315 ( Part 11) – 1985*.
Is code for UCS of rock?
Basic Details
| IS Number : | IS 9143 : 1979 |
|---|---|
| Technical Department : | Civil Engineering Department |
| Technical Committee : | CED 48 ( Rock Mechanics ) |
| Language : | English |
| ICS Code : | UDC 4 |
Is code for triaxial test on rock?
13047
Is 516 a cube test?
1: Cube Curing In Lab. The test specimen- shall be stored in a place, free from vibration, in the moist air of at least 90 percent relative humidity and at a temperature of 27° ± 2°C for 24 hours ± 0.5 hours from the time of addition of water to the dry ingredients.
Is code for specific gravity of rock?
the Stones Sectional Committee had been approved by the Civil Engineering Division Council. the property of true specific gravity is generally not used for selecting stones for construction purposes and for this generally apparent specific gravity as covered in IS : 1124-1974* is followed.
How do you get specific gravity?
The density is directly related to the mass of the object (unit: usually in grams but can be measured in kilograms or pounds), so the specific gravity can also be determined by dividing the mass of the object by the mass of the water.
How do you perform a specific gravity test?
The normal method of determining specific gravity is to weigh the specimen dry (DW), then to suspend the specimen in water on a string, and to measure the weight pulling on the string (WW) (specimen weight suspended in water). Then you subtract WW from DW, and divide the difference into DW.
What is the specific gravity of a fluid?
Specific Gravity – SG – is a dimensionless unit defined for liquids as “the ratio of the density of the substance to the density of water at a specified temperature”. For gases the Specific Gravity is related to air.
What are the factors affecting specific gravity?
A number of factors influence density or specific gravity of milk such as addition or removal of water, cream or other components etc. and temperature and pressure used during the processing of milk….The specific gravity of milk is decreased by:
- Addition of water.
- Addition of cream (fat)
- Increased temperature.
Does temperature affect specific gravity?
Can temperature affect specific gravity? Yes, it can. When using water as a reference for establishing specific gravity, it is almost always assumed that the water is at 4°C, when it’s densest. Water itself becomes less dense as it becomes warmer until it evaporates and becomes steam vapor at boiling point.
What is the relationship between temperature and specific gravity?
When the specific gravity is defined based on water at 4°C, then the specific gravity is equal to the density of the liquid. However, if the specific gravity is expressed at different temperatures, it will no longer be equal to the density.
How do air bubbles affect specific gravity?
Density or specific gravity (SG) is affected by entrapped air bubbles in the liquid under test. Under pressure the air will dissolve better into the liquid and any bubbles that are left undissolved will be compressed to a fraction of their original size.
How does temperature affect gravity reading?
A quick word about the temperature: Modern hydrometers are typically calibrated to read at 20C and a higher or lower temperature liquid affects the accuracy. A warmer temperature of 32C (typical of warm wort) would give a difference of plus 1.003. Our reading of 1.040 would actually be 1.043.
What should my final gravity be?
Typically, beer will have a gravity between ~1.040 to 1.090 before fermentation, and end between 1.010 to 1.020 after fermentation. Often, dry ciders, wines, and meads will have a final gravity less than 1.000.