What is a Spacer disk?
What is a Spacer disk?
It is a type of vertebral spacer inserted into the body to treat spinal stenosis and other painful disc conditions by restoring the spine to its correct alignment. FDA-approved, these spinal disc spacers are usually made of lightweight titanium or plastic and nestle between the affected vertebrae.
What is the use of test spacer disk?
The CBR spacer disc is used as a false bottom on a soil mold during the compaction process. It is plated rust-resistant steel has is 2.416″H x 5-15/16″ Dia.
What is CBR mold?
California Bearing Ratio (CBR) Mold Set. California Bearing Ratio (CBR) Mold Set is for use in CBR testing. The set consists of a 6x7in (152x178mm) Mold Body, 2in (51mm) Compaction Collar, and a perforated Mold Base with threaded rods and wing nuts. Constructed of heavy, rust-resistant plated steel.
Why is surcharge weight used in CBR test?
simulate worst natural moisture conditions. increase density of the sample.
Is CBR a 2720 test?
Note: For Railway Formation, dry density is estimated by heavy compaction test as per IS: 2720: Part-8: 1983….Procedure for California Bearing Ratio Test (CBR Test) of Soil:-
| Penetration Depth | Unit Standard Load | Total Standard Load |
|---|---|---|
| 2∙5 | 70 | 1370 |
| 5∙0 | 105 | 2055 |
Why CBR test is performed?
The California Bearing Ratio or CBR test is performed in construction materials laboratories to evaluate the strength of soil subgrades and base course materials.
How do you fix a CBR graph?
As per AASHTO T-193 if the curves start concave upwards they should be corrected by extending the linear portion of the curve until it intersects the x-axis (penetration) and use the intersection as the new origin of the axis. The zero-point of the load-penetration curves must be adjusted.
What is CBR formula?
C.B.R. = (PT/PS) X 100 4. The C.B.R. values are usually calculated for penetration of 2.5 mm and 5 mm. Generally the C.B.R. value at 2.5 mm will be greater than at 5 mm and in such a case/the former shall be taken as C.B.R. for design purpose.
How do you increase the CBR value of soil?
CBR value of clayey sand type of soil could be enhanced using materials like: lime, natural fibers, cement, fly ash, chemical compounds, etc.
Is a low CBR good?
What are the typical CBR values? The harder the material, the higher the CBR value. A CBR value of 2% is usually found for clay, high-quality sub-base will have CBR values between 80% and 100%, and some sands may have values around 10%.
What is a CBR spacer disc?
CBR Spacer Disc. BRA-61 CBR Spacer Disc provides a false bottom when placed in a BRA-60 Soil Mold to result in a properly sized sample. The plated-steel disc is 5.94inx 1.41 (151x36mm) DiaxH and has a threaded opening for the threaded stem for easy insertion and removal.
What are spinal disc spacers made of?
FDA-approved, these spinal disc spacers are usually made of lightweight titanium or plastic and nestle between the affected vertebrae. They serve as a substitute to traditional “cages”, spacers or grafts, which are typically made of metal, plastic, or bone, and are often used as a treatment for spinal stenosis.
What are spinal spacer injections?
It is a type of vertebral spacer inserted into the body to treat spinal stenosis and other painful disc conditions by restoring the spine to its correct alignment. FDA-approved, these spinal disc spacers are usually made of lightweight titanium or plastic and nestle between the affected vertebrae.
What is a peek spacer used for?
A PEEK spacer, also known as an intervertebral body spacer. It is a type of vertebral spacer inserted into the body to treat spinal stenosis and other painful disc conditions by restoring the spine to its correct alignment.
