Force Measurement: The needle is pushed into the compacted soil at a constant rate; the force required for penetration is measured, and penetration resistance is calculated by dividing the force by the needle's end area
Usage
Quick estimation of OMC during compaction control work, especially in the field after initial lab calibration
Classification
Geotechnical Engineering / Construction Quality Control
Warranty
Limited warranty as per manufacturer
Product Type
Soil Consistency Tester / Compaction Control Accessory
Core Components
Needle Case
Power Source
None
Accuracy
High %
Equipment Materials
Metal (Steel or Brass) and Plastic
Type
Proctor Needles
Dimension (L*W*H)
Standard dimensions Millimeter (mm)
Weight
Lightweight for easy handling Grams (g)
About Proctor Needles
Proctor Needles
The instrument consists of a needle attached to a spring loaded plunger, the stem of which is calibrated to read 0 to 40 kg division. Long stem is graduated at every 12.5mm to read depth of penetration and for use with needles of larger areas. The small penetration stem is also graduation in 12.5mm division and is used with needles of smaller areas. Needle points one each of 0.25, 0.5, 1.0, 1.5, 2.0, 3.5 and 6.0 sq Cm. And one tommy pin is supplied. Complete as above in a wooden carrying case.
FAQs of Proctor Needles:
Q: What is the automation grade of Proctor Needles?
A: The Proctor Needles have a manual automation grade.
Q: What is the primary usage of Proctor Needles?
A: Proctor Needles are primarily used for the determination of soil compaction and density.
Q: What is the warranty offered on Proctor Needles?
A: Proctor Needles come with a limited warranty as per the manufacturers terms.
Q: What type of materials are used in manufacturing Proctor Needles?
A: Proctor Needles are made using metal (steel or brass) and plastic components.
Q: What is the temperature range for operating Proctor Needles?
A: Proctor Needles can be used within the ambient room temperature range.
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Operate Method : Manual Trimming: Sample is mounted and slowly rotated; a wire saw or sharp knife is manually guided along the frame to trim the specimen to size
Usage : Minimizing end restraint effects in strength tests, ensuring test validity
Operate Method : Strain Control: The motor drives the lower platen upwards at a preset speed, causing the specimen to compress at a controlled strain rate against a fixed load sensor (Proving Ring/Load Cell)
Usage : Conducting strength tests like Triaxial, CBR, and Unconfined Compression
Operate Method : Mechanical Measurement: Axial load compresses the ring, causing the dial gauge plunger to deflect. The reading is multiplied by the calibration factor to get the force
Usage : Essential accessory for Triaxial, CBR, Unconfined Compression, Direct Shear, and penetration testing
Operate Method : Thread Rolling: Soil is rolled into a $3$ mm diameter thread on the glass plate until it begins to crumble; the moisture at this point is the Plastic Limit
Usage : Critical for calculating the Plasticity Index (PI = LL PL)