LENGTH COMPARATOR AZA0795

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:

 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.