AZA 1119 TAMPING ROD

Description

Tamping Rod is a simple yet essential hand tool used in concrete testing to ensure proper compaction of concrete in slump cones, cube molds, and cylindrical molds. At Azalab, we offer precision-finished, durable steel tamping rods designed to meet all major international testing standards.

Concrete compaction plays a crucial role in eliminating air voids and ensuring accurate measurement of strength and workability. The Tamping Rod helps achieve uniform density in concrete samples by applying consistent tamping across layers during preparation. Improper tamping can lead to under-compacted specimens, causing incorrect test results and compromised quality control.

Azalab’s Tamping Rods are manufactured using high-grade stainless or mild steel, hardened and polished to resist bending and corrosion. Each rod features hemispherical (rounded) ends, which prevent damage to molds and ensure even compaction. The rods are finished to exact diameter and length specifications in line with major testing standards:

• ASTM C143 / C192: Requires a 16 mm diameter rod, 600 mm length

• IS 1199: Accepts 16 mm diameter rod, 600 mm long

• ASTM C31 / C39 / C138: Also includes 25 mm diameter rods for larger molds or field compaction

The tamping process typically involves placing concrete in layers within a mold and rodding each layer uniformly. For slump testing, the concrete is rodded 25 times per layer using a 16 mm rod. In cylinder and cube testing, the same process is followed to eliminate trapped air pockets and settle the mix uniformly.

Each Tamping Rod from Azalab undergoes strict quality checks for dimensional accuracy and surface finish. They are suitable for:

• Slump cone test setups

• Cube mold compaction

• Cylinder mold preparation

• Density (unit weight) tests

• On-site concrete sampling

The rods are available in different variants:

• 16 mm × 600 mm (standard for slump and cube test)

• 25 mm × 600 mm or 450 mm (used in field compaction or larger molds)

• With engraved length/size markings (optional)

• In polished steel or rust-proof coated finish

To ensure testing consistency, it’s recommended to use only calibrated and dimensionally compliant tamping rods. The use of improper rods can result in over-compaction or under-compaction, skewing strength test results. Regular cleaning and inspection for bending or wear is also advised.

In labs that follow ASTM, IS, or BS standards, the tamping rod is a mandatory accessory for slump testing, compressive strength preparation, and unit weight measurement. Proper use of a standardized tamping rod improves data reliability and helps maintain accreditation for testing labs.

For details on slump testing procedures and proper compaction methods, refer to ASTM C143 Standard Practice for Slump of Hydraulic-Cement Concrete.

Whether you operate a construction lab, QC department, academic institute, or field testing unit, the Azalab Tamping Rod delivers standard-compliant performance, long life, and consistent compaction for accurate concrete testing.

 Specifications:

 FREQUENTLY ASKED QUESTIONS (FAQ):

Q1: What is a Tamping Rod used for?
A1: It is used to compact concrete in molds during slump, cube, and cylinder testing to remove air voids and improve accuracy.

Q2: What size tamping rod is used for slump tests?
A2: A 16 mm diameter, 600 mm long rod with a rounded end is used as per ASTM and IS standards.

Q3: Can this rod be used for all types of concrete molds?
A3: Yes, but different diameters (16 mm or 25 mm) may be needed depending on mold size and standard.

Q4: Is the tamping rod corrosion-resistant?
A4: Yes, Azalab offers rods in stainless steel and coated finishes to prevent rust.

Q5: Do you provide certification or markings on the rods?
A5: Optional engraved size markings or certificates of compliance can be provided upon request.