PROCTOR NEEDLES (SPRING TYPE) AZA0868
The AZA0868 Precision Proctor Needles (Spring Type) from Azalab are designed for rapid, on-site estimation of soil compaction and moisture condition. This portable instrument provides a practical alternative to full laboratory Proctor testing for preliminary assessment and quality control, particularly on cohesive and semi-cohesive soils encountered in embankments, subgrades, and trench backfills.
The instrument employs a calibrated, spring-loaded plunger to measure penetration resistance directly (0–40 kg range). Two graduated stems allow accurate tracking of penetration depth, while a comprehensive set of interchangeable needle tips enables testing across a range of soil densities and particle characteristics.
Applications
- Field assessment of soil compaction
- Estimation of optimum moisture condition
- Subgrade, fill, and trench inspection
- Construction quality control checks
- Geotechnical and educational field investigations
Description
Key Features
- Calibrated Spring Mechanism: Direct reading of penetration resistance up to 40 kg
- Dual Graduated Stems: Long and short stems with 12.5 mm graduation intervals for depth control
- Multiple Needle Tips: Seven interchangeable tips for varying soil conditions
- Portable Design: Compact construction with a protective wooden carrying case
- Rugged Build: Stainless steel / powder‑coated steel body suitable for site use
Specifications
| Component | Details |
|---|---|
| Load Range | 0–40 kg |
| Stem Graduations | Every 12.5 mm (long & short stems) |
| Long Stem Use | Larger needle areas, deeper penetration |
| Short Stem Use | Smaller needle areas, close‑range accuracy |
| Needle Points Included | 0.25, 0.5, 1.0, 1.5, 2.0, 3.5, 6.0 cm² |
| Tommy Pin | Included |
| Body Material | Stainless steel / powder‑coated steel |
| Carry Case | Wooden, foam‑lined interior |
What’s Included
- Spring‑loaded plunger with calibrated stem
- Long stem and short stem with 12.5 mm graduations
- Seven interchangeable needle points
- Tommy pin for assembly and disassembly
- Wooden storage and carrying case
Frequently Asked Questions (FAQ)
Q1: What is the load range of the AZA0868?
A: The instrument measures penetration resistance up to 40 kg.
Q2: Why are two stems provided?
A: The long stem is used with larger needle areas for deeper penetration, while the short stem is used with smaller needle tips for improved accuracy near the surface.
Q3: How is the instrument calibrated?
A: The unit is factory‑calibrated. Calibration certificates can be provided on request.
Q4: Is this suitable for sandy soils?
A: The AZA0868 is best suited for cohesive and semi‑cohesive soils. Results in clean, non‑cohesive sands may vary.
Q5: Is the instrument portable for site work?
A: Yes. It is compact and supplied in a durable wooden case for easy transport and field use.
AZA0868 – Precision Proctor Needles provide a fast, practical, and reliable method for estimating soil compaction and moisture condition directly at site, supporting efficient construction quality control and geotechnical decision‑making.
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The DCP test provides a fast and economical method to assess the strength of subgrades, sub-bases, and granular base course layers, with results that can be directly correlated to California Bearing Ratio (CBR) values. This eliminates the need for time-consuming laboratory testing or undisturbed soil sampling, enabling immediate decision-making at site.
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-
- Specify target field compaction densities
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This instrument is ideally suited for geotechnical laboratories, construction quality control, chemical and pharmaceutical industries, food processing, and material testing laboratories, where rapid and repeatable moisture data is essential for process control and compliance.
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Accurate assessment of soil permeability is critical in geotechnical engineering applications including foundation design, earth dams, embankments, drainage systems, seepage analysis, and groundwater flow studies. The AZA0876 provides reliable, repeatable, and standard-compliant results for professional laboratories.
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Principle of Operation
A soil paste prepared at a known moisture content is placed in the sample cup. The stainless steel cone, of specified mass and angle, is allowed to penetrate the soil freely for 5 seconds. The depth of penetration (up to 20 mm) is measured using a precision depth gauge. The moisture content corresponding to 20 mm penetration is defined as the liquid limit of the soil.Standards Compliance
- IS 2720 (Part 5) – Determination of liquid and plastic limits
- ASTM D4318 – Liquid Limit, Plastic Limit, and Plasticity Index of Soils
