ZC4 brick rebound hammer for non-destructive testing of fired clay brick compressive strength by the rebound method.
Overview
The ZC4 ZC4 Brick Rebound Hammer is a hand-held NDT instrument designed per local standards (e.g. DB34/T 234) for testing the compressive strength of fired-clay bricks by the rebound method. A spring drives a striking hammer that impacts the brick surface; the elastic recovery propels the hammer and pointer back along a graduated scale, giving a rebound value from which the brick's compressive strength is estimated. With 0.735J nominal impact energy (higher than the mortar model), a metal tubular body and no batteries required, it is simple, light, flexible and easy to use. Widely used on construction sites, brickworks and building-survey work for non-destructive strength assessment of fired-clay bricks, perforated bricks and lightweight aggregate concrete.
Applications
• Road and highway engineering laboratory testing
• Construction material quality control and acceptance
• Research and teaching laboratories
• Third-party inspection and certification bodies
Features
• Robust construction suitable for both laboratory and field use
• Compliant with relevant Chinese and international testing standards
• Complete with calibration certificate and operation manual
Technical Specifications
| Item | Specification |
| Nominal impact energy | 0.735J (0.075kgf·m) |
| Hammer stroke | 75±0.3mm |
| Pointer slider friction | 0.5±0.1N |
| Tension spring working length | 61.5±0.3mm |
| Latch release position | at scale mark "100" |
| Spherical radius of striking nose | 25±1mm |
| Anvil calibration value | 74±2 |
| Measured | fired-clay brick, perforated brick, lightweight concrete |
| Body | metal tubular, hand-held |
| Reading | mechanical graduated scale + pointer |
| Power | no battery required |
| Standard | DB34/T 234 rebound method for brick |
| Features | light, flexible, accurate, easy to use |
| Application | site, brickworks, building survey |
| Difference | 0.735J vs 0.196J for mortar model |
Standards
GB/T, JTG, ASTM
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Spare parts kit
FAQ
Q1: What standards does the ZC4 Brick Rebound Hammer comply with?
A1: The ZC4 Brick Rebound Hammer is designed and manufactured in accordance with relevant Chinese national (GB) and transport industry (JTG) standards, as well as applicable ASTM and AASHTO international standards. A calibration certificate traceable to national standards is provided with each unit.
Q2: How often should the ZC4 Brick Rebound Hammer be calibrated?
A2: We recommend annual calibration by authorized technicians or by iRoad after-sales service center. For high-frequency laboratory use, semi-annual calibration is advised. The instrument is supplied with a factory calibration certificate.
Q3: What is the lead time and do you provide training?
A3: Standard units are usually shipped within 7-15 working days. Custom configurations may require 20-30 days. iRoad provides on-site installation, commissioning and operator training for major equipment; remote video guidance is available for standard laboratory instruments.
Overview
The ZC4 ZC4 Brick Rebound Hammer is a hand-held NDT instrument designed per local standards (e.g. DB34/T 234) for testing the compressive strength of fired-clay bricks by the rebound method. A spring drives a striking hammer that impacts the brick surface; the elastic recovery propels the hammer and pointer back along a graduated scale, giving a rebound value from which the brick's compressive strength is estimated. With 0.735J nominal impact energy (higher than the mortar model), a metal tubular body and no batteries required, it is simple, light, flexible and easy to use. Widely used on construction sites, brickworks and building-survey work for non-destructive strength assessment of fired-clay bricks, perforated bricks and lightweight aggregate concrete.
Applications
• Road and highway engineering laboratory testing
• Construction material quality control and acceptance
• Research and teaching laboratories
• Third-party inspection and certification bodies
Features
• Robust construction suitable for both laboratory and field use
• Compliant with relevant Chinese and international testing standards
• Complete with calibration certificate and operation manual
Technical Specifications
| Item | Specification |
| Nominal impact energy | 0.735J (0.075kgf·m) |
| Hammer stroke | 75±0.3mm |
| Pointer slider friction | 0.5±0.1N |
| Tension spring working length | 61.5±0.3mm |
| Latch release position | at scale mark "100" |
| Spherical radius of striking nose | 25±1mm |
| Anvil calibration value | 74±2 |
| Measured | fired-clay brick, perforated brick, lightweight concrete |
| Body | metal tubular, hand-held |
| Reading | mechanical graduated scale + pointer |
| Power | no battery required |
| Standard | DB34/T 234 rebound method for brick |
| Features | light, flexible, accurate, easy to use |
| Application | site, brickworks, building survey |
| Difference | 0.735J vs 0.196J for mortar model |
Standards
GB/T, JTG, ASTM
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Spare parts kit
FAQ
Q1: What standards does the ZC4 Brick Rebound Hammer comply with?
A1: The ZC4 Brick Rebound Hammer is designed and manufactured in accordance with relevant Chinese national (GB) and transport industry (JTG) standards, as well as applicable ASTM and AASHTO international standards. A calibration certificate traceable to national standards is provided with each unit.
Q2: How often should the ZC4 Brick Rebound Hammer be calibrated?
A2: We recommend annual calibration by authorized technicians or by iRoad after-sales service center. For high-frequency laboratory use, semi-annual calibration is advised. The instrument is supplied with a factory calibration certificate.
Q3: What is the lead time and do you provide training?
A3: Standard units are usually shipped within 7-15 working days. Custom configurations may require 20-30 days. iRoad provides on-site installation, commissioning and operator training for major equipment; remote video guidance is available for standard laboratory instruments.
