1. Вовед
The GOYOJO GCTH-60 Concrete Rebound Hammer Tester is a high-precision instrument designed for non-destructive testing (NDT) of concrete compressive strength and hardness. It is suitable for various applications including concrete hardness testing, engineering acceptance and quality checks, building and housing inspections, and road and bridge assessments. This manual provides essential information for the safe and effective operation and maintenance of your device.
2. What's in the Package
Carefully unpack the contents and verify that all items are present and undamaged. If any items are missing or damaged, please contact customer support.
- Concrete Rebound Hammer Tester
- Гриндстон
- Spring + Spring Buffer
- Алатки за шрафцигер
- Instruction Manual / Certificate of Conformity
- Случај за инструменти
3. Структура на производот
Familiarize yourself with the different parts of the Concrete Rebound Hammer Tester for proper operation and maintenance.
- Bullet Stick: The impact component that strikes the concrete surface.
- Seal Ring: Ensures internal components are protected from dust and debris.
- Pointer Axis: Guides the pointer for accurate rebound value display.
- Скала: Displays the rebound value (R).
- Копче: Releases the impact mechanism and locks the pointer.
- Предна корица: Protects the internal mechanism.
- Тело од не'рѓосувачки челик: Provides high hardness and wear resistance for durability.
- Графикон: Integrated chart for converting rebound values to estimated compressive strength.
4. Упатства за работа
Follow these steps for accurate concrete strength testing:
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4.1. Подготовка на површината
Ensure the concrete surface to be tested is smooth, clean, and dry. Remove any loose particles, plaster, or paint. If the surface is rough, use the included grindstone to smooth a small area for testing.
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4.2. Positioning the Tester
Hold the rebound hammer firmly with both hands. Position the tester perpendicular (at a 90-degree angle) to the concrete surface. Ensure stable contact with the surface.
Figure 4: Proper 90-degree positioning for testing. -
4.3. Performing the Test
Gradually push the rebound hammer towards the concrete surface. The internal spring mechanism will compress, and when the impact energy is reached, the hammer will automatically rebound. The pointer will indicate the rebound value (R) on the scale.
Figure 5: Initiating the rebound test by pressing the hammer. -
4.4. Reading the Rebound Value
After the rebound, the pointer will lock in place, displaying the rebound value (R) on the intuitive display panel. Read the value directly from the scale.
Figure 6: Intuitive value display panel for accurate measurement. The GCTH-60 features an accurate index and even friction for precise readings.
Figure 7: Accurate Index & Even Friction for consistent measurements. -
4.5. Converting Rebound Value to Compressive Strength
Use the integrated chart on the side of the tester to convert the rebound value (R) into an estimated compressive strength (N/mm² or MPa). Follow the lines on the chart corresponding to the rebound value and the age of the concrete to find the approximate compressive strength.
Figure 8: Conversion chart for rebound values to estimated compressive strength. -
4.6. Multiple Applications
The GOYOJO GCTH-60 is versatile and can be used for various concrete assessment tasks, making it suitable for both professionals and non-professionals.
Figure 9: Versatile applications of the Concrete Rebound Hammer Tester.
5. Одржување
Proper maintenance ensures the longevity and accuracy of your GOYOJO GCTH-60 Rebound Hammer Tester.
- Чистење: After each use, wipe the exterior of the tester with a soft, dry cloth. Ensure no concrete dust or debris enters the internal mechanism.
- Grindstone: Use the provided grindstone to prepare rough concrete surfaces. Clean the grindstone after use to maintain its effectiveness.
- Складирање: Store the tester in its instrument case in a dry, clean environment away from direct sunlight and extreme temperatures.
- Spring and Guide Rod: The device features a new upgraded spring and guide rod designed for high toughness and accurate measurements, contributing to its 300,000+ impact lifespan. While designed for durability, avoid unnecessary impacts or drops to maintain optimal performance.
6 Смена на проблеми
If you encounter issues with your rebound hammer, refer to the following common problems and solutions:
| Проблем | Можна причина | Решение |
|---|---|---|
| Неконзистентни читања | Rough or unprepared surface; improper angle; internal mechanism issue. | Ensure surface is smooth and clean. Maintain a 90-degree angle. If issues persist, contact customer support. |
| Pointer does not lock or move smoothly | Dust/debris in mechanism; damaged internal components. | Gently clean the pointer area. Do not force movement. If damaged, contact customer support. |
| Low rebound values on known strong concrete | Surface moisture; carbonation layer; calibration needed. | Ensure surface is dry. Consider removing a thin layer if carbonation is suspected. Regular calibration is recommended. |
7. Спецификации
| Карактеристика | Спецификација |
|---|---|
| Име на брендот | ГОЈОЈО |
| Модел | GCTH-60 |
| Потекло | Континентална Кина |
| Опсег на тестирање | 10-60 MPa (1450-8702 psi) |
| Енергија на влијание | 2.207 Ј |
| Материјал за тело | Цврст не'рѓосувачки челик |
| Impact Lifespan | 300,000+ impacts |
| Вклучена батерија | бр |
| Хемикалија со висока загриженост | Никој |
| Димензии (приближно) | Length: 11 inches, Diameter: 2.2 inches |
8. Кориснички совети
- For best results, perform at least 9-12 tests within a 30x30 cm area, discarding the highest and lowest 20% of readings, and average the remaining values.
- Always ensure the test surface is free from moisture, as water can significantly affect rebound readings.
- When testing vertical surfaces, adjust the rebound value according to the correction factors provided in the full instruction manual or relevant standards.
- Regularly check the condition of the impact plunger and ensure it moves freely.
- Keep the instrument case clean to prevent dust and grit from entering the device during storage.
9. Гаранција и поддршка
The GOYOJO GCTH-60 Concrete Rebound Hammer Tester is backed by 24/7 customer support and lifetime technical assistance for worry-free use. For any questions, technical assistance, or warranty claims, please contact the seller or manufacturer directly.
