ZC5 mortar rebound hammer for non-destructive estimation of masonry mortar compressive strength by the rebound method.
Overview
The ZC5 ZC5 Mortar Rebound Hammer is a hand-held NDT instrument designed per JGJ/T 136 / GB/T 50315 "Technical specification for testing masonry mortar strength by rebound method". A spring drives a striking hammer that impacts the mortar surface in fired-brick masonry; the elastic recovery propels the hammer and pointer back along a graduated scale, giving a rebound value from which the compressive strength of the mortar is estimated. With a metal tubular body it is simple, light, durable and stable; the operator simply holds it perpendicular to the surface. Used for in-situ non-destructive estimation of mortar compressive strength in fired-clay and perforated-brick masonry of buildings.
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 | 0.196J (0.02kgf·m) |
| Hammer stroke | 75±0.3mm |
| Pointer slider friction | 0.5±0.1N |
| Tension spring working length | 61.5±0.3mm |
| Spring stiffness | 69±4 N/m |
| Latch release position | at scale mark "100" |
| Hammer start position | between scale marks "0"–"1" |
| Spherical radius of striking nose | 25±1mm |
| Anvil calibration value | 74±2 |
| Measured | compressive strength of masonry mortar |
| Body | metal tubular, hand-held |
| Reading | mechanical graduated scale + pointer |
| Standard | GB/T 50315 rebound method for masonry mortar |
| Features | light, durable, accurate reading |
| Application | in-situ NDT of masonry mortar strength |
Standards
GB/T 17671, ISO 679, EN 196-1
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Spare parts kit
FAQ
Q1: What standards does the ZC5 Mortar Rebound Hammer comply with?
A1: The ZC5 Mortar 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 ZC5 Mortar 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 ZC5 ZC5 Mortar Rebound Hammer is a hand-held NDT instrument designed per JGJ/T 136 / GB/T 50315 "Technical specification for testing masonry mortar strength by rebound method". A spring drives a striking hammer that impacts the mortar surface in fired-brick masonry; the elastic recovery propels the hammer and pointer back along a graduated scale, giving a rebound value from which the compressive strength of the mortar is estimated. With a metal tubular body it is simple, light, durable and stable; the operator simply holds it perpendicular to the surface. Used for in-situ non-destructive estimation of mortar compressive strength in fired-clay and perforated-brick masonry of buildings.
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 | 0.196J (0.02kgf·m) |
| Hammer stroke | 75±0.3mm |
| Pointer slider friction | 0.5±0.1N |
| Tension spring working length | 61.5±0.3mm |
| Spring stiffness | 69±4 N/m |
| Latch release position | at scale mark "100" |
| Hammer start position | between scale marks "0"–"1" |
| Spherical radius of striking nose | 25±1mm |
| Anvil calibration value | 74±2 |
| Measured | compressive strength of masonry mortar |
| Body | metal tubular, hand-held |
| Reading | mechanical graduated scale + pointer |
| Standard | GB/T 50315 rebound method for masonry mortar |
| Features | light, durable, accurate reading |
| Application | in-situ NDT of masonry mortar strength |
Standards
GB/T 17671, ISO 679, EN 196-1
Standard Delivery
• Main instrument unit
• Power cable
• Operation manual
• Spare parts kit
FAQ
Q1: What standards does the ZC5 Mortar Rebound Hammer comply with?
A1: The ZC5 Mortar 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 ZC5 Mortar 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.
