CBR Testing Services –
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Specialists

We undertake CBR Testing and Plate Load Tests for clients across the UK. Ideal for those who require information relating to sub base materials when undertaking projects such as road and pavement design. Or additionally, other design projects such as parking / loading areas or temporary foundations.

We provide CBR Tests as part of our comprehensive Site Testing Services. We provide results quickly and efficiently to Civil Engineering and Construction companies. Enabling them to design their roads and pavements effectively and accurately.

We have offices right across the UK which means we can offer on-site testing at one fixed rate no matter where you are.

Contact us on 03330124352 for a no obligation quote.

 

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What is California Bearing Ratio (CBR) Testing?

The California Bearing Ratio (CBR) test is a penetration test. This is used to evaluate the subgrade strength of roads and pavements. At STS we have the comprehensive experience and expert knowledge to help you.

Field in-place CBR Test results are used for the evaluation and design of flexible pavement components. These include base and subbase course and subgrades and for other applications (such as unsurfaced roads) for which CBR is the desired strength parameter.

 

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CBR Testing Results

Any construction activities, such as grading or compacting, carried out subsequent to the CBR Test can invalidate the results of the test.

Soils and flexible pavement components at the same location may exhibit significantly different load deflection relationships. No method presently exists to evaluate the precision of a group of non-repetitive plate load tests on soils and flexible pavement components. This is due to the variability of these materials.

Field in-place tests are used to determine the relative strength of soils and subbase. As well as some base materials in the condition at which they exist at the time the test takes place. Such results have direct application in test section work and in some expedient construction, military, or similar operations. Also, as indicated in 4.1, field in-place tests can be used for design under conditions of nominal stability of water, density, and general characteristics of the material tested. However, any significant treating, disturbing, handling, compaction, or water change can affect the soil strength and make the prior to test determination inapplicable, leading to the need for retest and reanalysis.

 

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