Jul 4 2011
Results that are obtained from concrete specimens during laying of concrete may not actually represent the concrete strength in the structure. In situ NDT (non-destructive testing) at several locations is more representative. NDT techniques are generally quick and economical and they make ideal tools for quality assurance. NDT results are more indicative of the overall quality of concrete in the structure.
Case Study
This case study is about Geotech Services, their requirements for on-site non-destructive testing of the compressive strength of concrete, how they applied the SilverSchmidt UN for their processes and the benefits received.
Customer Profile
Geotech Services is a well-known consulting firm in Central India, providing quality assurance services to several civil engineering projects. It has received the ISO 17025 certification for its testing laboratory.
Customer Requirements
The customers requirements listed below based were key in their selection of the SilverSchmidt UN for their particular application:
- Non-destructive testing of the compressive strength of concrete on the site itself
- Since testing frequency is high, high speed was required
- Reliable strength measurement for all types of concrete
Proceq Product SilverSchmidt UN Concrete Test Hammer
The Schmidt hammer does not require any test angle corrections, has a simple one button operation, datalogging capability with USB download and comprehensive reporting capability. The impact energy of the hammer is around 2.207Mn, the compressive strength range is approximately 10 to170MPa and the battery life is greater than 1000 tests. It is essential to have impacts before recharging.
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Applications
The SilverSchmidt UN model concrete test hammer has been applied in a number of areas in Geotech services. The applications are listed below:
- To determine in-situ concrete strength as a quality control tool and also to study the need for rehabilitation of old structures.
- A study is also being carried out on correlation of NDT results for fibre-reinforced concrete.
- The laboratory performs NDT tests on concrete specimens before crushing and presents first hand correlations to their clients for the specific concrete design mix.
- This gives clients complete confidence in the NDT results conducted during construction. It avoids the test specimen casting.
- Geotech testing requirements lie between 20 and 60 MPa.
Benefits to the Customer
The customer has been highly benefited by the use of the instrument and the advantages of the SilverSchmidt UN model concrete test hammer are listed below:
- Impact angle independence
- Hammerlink Software for result interpretation
- User defined conversion curves correlated to the specific design mix
Conclusions
Geotech Services have been using Proceq’s products since 2009. By using the SilverSchmidt UN model, the interpretation of test results has greatly improved. By providing customers with quick and reliable testing results, Geotech has been able to win customer confidence. This has definitely yielded results as they now have a good number of highly satisfied and loyal customers. Geotech is looking forward to use more of Proceq’s total concrete solutions for their future requirements.
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This information has been sourced, reviewed and adapted from materials provided by Proceq.
For more information on this source, please visit Proceq.