LENGTH COMPARATOR AZA0795
- Measures length change in cement & mortar specimens
- Conforms to IS 4031 and ASTM C490 standards
- Precision dial gauge with ±0.001 mm resolution
- Rigid frame with reference anvil and movable tip
- Compatible with standard shrinkage bar moulds
- Ideal for laboratory and quality control testing
Description
Length Comparator AZA0795 is a precision laboratory instrument used to measure the length change in hardened cement, mortar, or concrete specimens to evaluate their drying shrinkage behavior. Designed as per IS 4031 (Part 10) and ASTM C490, it plays a critical role in assessing volume stability and crack potential in construction materials.
Available at Azalab, a leading name in scientific equipment, this comparator is manufactured with accuracy and durability in mind. It’s suitable for both quality control labs and educational institutions, ensuring standardized and repeatable shrinkage testing.
- Measures length change in cement & mortar specimens
- Conforms to IS 4031 and ASTM C490 standards
- Precision dial gauge with ±0.001 mm resolution
- Rigid frame with reference anvil and movable tip
- Compatible with standard shrinkage bar moulds
- Ideal for laboratory and quality control testing
Applications:
- Drying shrinkage measurement of cementitious materials
- Quality control in cement and concrete testing labs
- Use in conjunction with Shrinkage Bar Moulds (e.g., AZA 0797)
- Monitoring length changes due to temperature and humidity effects
Product Features:
The AZA0795 Length Comparator consists of a rigid metallic frame with a precision dial gauge and reference anvil. It is designed to accommodate 25 mm × 25 mm × 285 mm shrinkage bars (standard specimen size per IS/ASTM). The comparator uses stainless steel contact points that fit into the metal inserts on either end of the specimen to provide highly accurate length measurements.
Technical Highlights:
- Dial Gauge Resolution: ±0.001 mm
- Measuring Range: 0 – 10 mm (extendable based on model)
- Reference Anvil: Hardened steel, non-corrosive
- Compatibility: Works with standard shrinkage bar moulds (IS 4031)
- Stability: Non-slip base with leveling adjustment screws
Once a specimen is cured (using mould like AZA 0797 Shrinkage Bar Mould), it is inserted into the comparator. The contact points engage the stainless-steel inserts in the specimen, and the dial gauge records length change due to drying shrinkage.
Importance in Material Testing:
Cement and mortar mixes with excessive shrinkage can develop micro-cracks, leading to reduced strength and premature deterioration. Using the AZA0795 Length Comparator ensures:
- Accurate shrinkage measurement
- Validation of cement quality
- Improved material durability
- Optimized mix designs
Standards & Compliance:
- IS 4031 (Part 10): Methods of physical tests for hydraulic cement – Determination of drying shrinkage
- ASTM C490: Standard Practice for Use of Apparatus for the Determination of Length Change
Read the full IS standard here: IS 4031 Part 10 PDF
Why Choose AZA0795 from Azalab?
- Calibrated & certified for lab use
- Compatible with all IS standard shrinkage moulds
- Supplied with dial gauge, base, anvil & comparator arm
- Excellent after-sales support and prompt delivery
- Trusted by government labs, universities, and civil contractors
Explore more testing tools at Azalab’s Official Site
Specifications:
| Parameter | Specification |
| Model | AZA0795 |
| Dial Gauge Accuracy | ±0.001 mm |
| Measuring Range | 0 – 10 mm |
| Compatible Specimens | 25 mm x 25 mm x 285 mm |
| Frame Material | Cast Iron / Stainless Steel Frame |
| Anvil Type | Hardened Steel |
| Compliance | IS 4031 (Part 10), ASTM C490 |
| Includes | Comparator stand, dial gauge, anvil set |
Frequently Asked Questions (FAQ):
Q1: What is the main function of the AZA0795 Length Comparator?
A: It measures length change in cement and mortar bars to determine drying shrinkage.
Q2: What size of specimens is it compatible with?
A: Standard 25 mm × 25 mm × 285 mm shrinkage specimens as per IS 4031.
Q3: Does it come with a dial gauge?
A: Yes, a precision dial gauge with ±0.001 mm resolution is included.
Q4: Can this be used for concrete shrinkage tests?
A: Yes, as long as the specimen dimensions match standard shrinkage bar size.
Q5: Is the instrument calibrated?
A: Yes, it is factory-calibrated and ready for lab use.
Additional information
| Model |
AZA 0798 |
|---|---|
| Dial Gauge Accuracy |
±0.001 mm |
| Measuring Range |
0 – 10 mm |
| Compatible Specimens |
25 mm x 25 mm x 285 mm |
| Frame Material |
Cast Iron / Stainless Steel Frame |
| Anvil Type |
Hardened Steel |
| Compliance |
IS 4031 (Part 10), ASTM C490 |
| Includes |
Comparator stand, dial gauge, anvil set |
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FLOW TABLE AZA0791B
JOLTING APPARATUS AZA0802
The AZA0802 Jolting Apparatus is a precision-engineered laboratory instrument designed for uniform compaction of cement mortar specimens, ensuring reproducibility and accuracy in strength testing. It plays a vital role in preparing mortar prisms for compressive and flexural strength tests, eliminating air voids and ensuring homogeneous density throughout each specimen.
Manufactured in accordance with IS 10080:1982, and suitable for use under EN 196-1 and ASTM C348 testing standards, the AZA0802 is essential for any laboratory involved in cement quality evaluation, research, or certification.
Whether used in construction QC labs, cement manufacturing units, academic institutions, or R&D centers, the AZA0802 offers dependable, consistent, and safe compaction performance for standardized mortar testing.
Why Compaction Matters in Mortar Testing
The quality and reliability of mortar strength tests depend heavily on the degree of compaction during specimen preparation. Air voids, improper leveling, or inconsistent compaction can lead to inaccurate test values and unreliable performance assessments.
The AZA0802 utilizes a mechanical cam-driven system delivering 60 precise jolts per minute, effectively removing entrapped air from the mortar mix. An inbuilt 60-second automatic timer ensures standard-compliant compaction by stopping the machine after the required number of jolts.
This ensures:
-
Highly consistent mortar density
-
Repeatable strength results
-
Compliance with national and international testing standards
Applications Across Industries
The AZA0802 Jolting Apparatus is widely used in:
-
Cement manufacturing QC laboratories
-
Construction and civil engineering testing labs
-
Educational and training institutes
-
Material certification & calibration laboratories
-
R&D units working on advanced cement products
Key Features & Benefits
-
Standard-Compliant Operation
Conforms fully to IS 10080, EN 196-1, and ASTM C348 for mortar compaction. -
Precise Jolting Mechanism
Delivers 60 calibrated jolts/min, with smooth camshaft motion ensuring uniform compaction. -
Heavy-Duty Mild Steel Frame
Rigid, vibration-resistant structure enhances accuracy and long-term reliability. -
Automatic Timer Control
Pre-set 60-second timer ensures correct compaction cycles without operator intervention. -
Safety Enclosure
Protective guard minimizes risk by shielding moving components during operation. -
Quick-Action Mould Clamping
Secure clamping mechanism designed for 40 × 40 × 160 mm prism moulds. -
Space-Saving Design
Compact, bench-top model ideal for laboratories with limited workspace. -
Low-Maintenance Drive System
Enclosed mechanism requires minimal lubrication and cleaning.
Technical Specifications
| Specification | Details |
|---|---|
| Model | AZA0802 |
| Application | Mortar Prism Compaction |
| Conformity | IS 10080, EN 196-1, ASTM C348 |
| Jolts per Minute | 60 jolts/min (customizable) |
| Timer | 60-sec automatic timer |
| Compatible Mould Size | 40 × 40 × 160 mm |
| Motor Power | 0.25 HP, 230 V AC |
| Construction | Mild steel frame, powder coated |
| Dimensions (L × W × H) | Approx. 500 × 350 × 450 mm |
| Weight | Approx. 35–40 kg |
| Warranty | 1 Year (Manufacturing defects only) |
| Made In | India |
Frequently Asked Questions (FAQ)
Q1: What is the purpose of a jolting apparatus?
It compacts mortar uniformly by applying controlled jolts, removing air pockets and ensuring specimen consistency for strength testing.
Q2: How many jolts does the AZA0802 deliver?
It delivers 60 jolts in one minute, as required by IS 10080. Custom settings are available upon request.
Q3: Which moulds can it be used with?
It is compatible with all standard 40 × 40 × 160 mm mortar prism moulds.
Q4: Is it suitable for educational laboratories?
Yes. Safety guards, controlled operation, and automatic timing make it ideal for use by students under supervision.
Q5: Does it require heavy maintenance?
No. The apparatus has a sealed mechanism requiring minimal lubrication and is easy to clean after each session.
LE CHATELIER MOULD AZA0792
PLUNGER PENETRATION APPARATUS AZA0808
PRISM MOULD THREE GANG AZA0803
- Triple-cavity unit for mortar sample casting
- Ideal for compressive/flexural testing
- IS/EN-compliant precision mould
- Lab-grade cast iron build
- Smooth de-moulding and cleaning
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VIBRATING MACHINE AZA0806
- Powerful vibrating machine for concrete specimen compaction
- Adjustable vibration frequency and amplitude
- Suitable for cubes, cylinders, and beams
- Conforms to IS 516 and ASTM C192 standards
- Durable steel construction with corrosion resistance
- Compact design and user-friendly operation
VOLUME CHANGE APPARATUS AZA0796
- Precision apparatus for measuring soil volume change
- Ideal for CD and CU triaxial testing
- Manual and digital versions available
- Durable lab-grade stainless steel build
- Fully compliant with IS and ASTM standards
- Provided with all necessary accessories
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