PCE Instruments PCE-HT-225A Handleiding
PCE Instruments
Meetapparatuur
PCE-HT-225A
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OPERATION MANUAL
Sino Age Development Techtrade Ltd.
-
User Manual
Surface Testing PCE-HT-225A
Table of contents
Chapter1 - General Description ........................................................................................................... 4
1.1. Applications ....................................................................................................................... 4
1.2. Basic principle ................................................................................................................... 4
1.3. Structure of Concrete Test Hammer .................................................................................. 4
1.4. Main technical specications ............................................................................................ 5
Chapter2 - Operating and Testing Methods of Concrete Test Hammer .............................................. 6
2.1. Operating method of Concrete Test Hammer ................................................................... 6
2.2. Testing method of Concrete Hammer ............................................................................... 7
2.2.1. Preparatory process of test ................................................................................................ 7
2.2.2. Rules for resilience test ..................................................................................................... 8
2.2.3. Determination of carburized depth .................................................................................. 10
Chapter3 - Processing of test data ..................................................................................................... 12
3.1. Calculation of resilience value ........................................................................................ 12
3.2. Calculation of carburized depth ...................................................................................... 14
3.3. Evaluation of concrete strength ....................................................................................... 14
Chapter4 - Maintenance of Concrete Test Hammer .......................................................................... 17
Appendix 1 - Common faults of the Concrete Test Hammer and the analysis on their causes ......... 18
Appendix 2 - Conversion table of concrete strength value of test zone ............................................. 20
03
Chapter 1 - General Description
1.1. Applications
With the merits of simple structure, easy correction, maintenance and repair, and
portability, the Concrete Test Hammer is widely used in civil engineering and
construction industry for testing the strength of concrete. Compared to other
nondestructive testers, the Concrete Test Hammer is an economical and practical
nondestructive testing instrument.
HT-225A is a medium Concrete Test Hammer, its kinetic energy of impact is
2．207J(0.225kgfm)．It is extensively used for testing the strength of various concrete
members (slab, beam, column) of normal building strength and bridge.
1.2. Basic principle
When testing the strength of concrete, Concrete Hammer uses a certain elastic force to
transit the impact force of an impact hammer to the surface of concrete, its initial
kinetic energy redistributes, a part of energy in the form of plastic deformation or
residual deformation is absorbed by the concrete, and another part of energy which is
proportional to the surface hardness is transmitted to the impact hammer, making the
hammer resile to a certain height, then the strength of the concrete is derived from the
proportional relation between the height of resilience and the concrete strength ．
1.3. Structure of Concrete Test Hammer
The Concrete Test Hammer is mainly composed of ip system, value-indicating
system and shell component．Its structure is shown in Fig．1． The diagram shows the
state that the impact hammer has nished impact in the test and the pushbutton has
locked the movement，ie． ．retaining state of resilience value
04
Product specificaties
| Merk: | PCE Instruments |
| Categorie: | Meetapparatuur |
| Model: | PCE-HT-225A |
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