Simtec - CBR Testing Services
Simtec Material Testing has the capability to conduct CBR (California Bearing Ratio) and Incremental Plate Load testing throughout the UK. A UKAS-accredited company for delivering both tests in accordance with, BS1377-9:1990 and IAN73/06 standards.
An indication of test results can be supplied the same day. Following this, test reports will be supplied in electronic format within a specified timescale.
Both methods of plate testing require kentledge. This is usually in the form of a 360-degree site excavator or a similar item of plant. This must be provided by the client and must be available on-site.
The CBR & Incremental Plate Load Test Explained:
Preliminary tests, called "plate bearing," are necessary before constructing new structures, highways, or crane base pads. Plate bearing tests provide important information for planning purposes. Primarily there are two types of plate bearing test, both of which offer extremely reliable results to the client. These are:
- Plate CBR Test (California Bearing Ratio)
- A Incremental Plate Load Test
Both of these are used to strengthen and handle stress in various construction layers. These layers include formation, subgrade, capping, sub-base, and stabilised materials.
Simtec offers both of these on-site services throughout the UK. We are UKAS accredited for both tests in accordance with BS1377-9:1900 and IAN73/06. This accreditation is for the purpose of CD225 (Design for new pavement foundations). This gives clients and third parties assurance and confidence that our processes and results are robust. Unlike many other operators in our sector, we have this accreditation.
Services provide data about your site. This data can help decide the plan of action before construction. This includes pavement design, newly-built roads, industrial units, and various civil works. Indicative test results can be provided same day, with test reports supplied in electronic format within a specified agreed timescale.
A CBR value is usually represented as a percentage. A Clay usually achieves around 2% with compacted or undisturbed sands up to around 10%. A well-compacted sub-base should achieve 30% CBR and above. For particle sizes larger than 20mm you will need to look for Plate Bearing Tests.
CBR testing is rigorous and requires multiple tests across the site. This test is usually carried out at surface level or 500-1000mm deep. It is repeated along the proposed centreline of the carriageway. This gives you a good indication of the strength of your sub-base before any construction takes place.
This standard test has been a mainstay of civil engineering since the 1930s. CBR testing can also be used to assess existing ground conditions to complete geotechnical investigations. This allows you to plan and fine-tune your project to any formation encountered during construction.
Incremental Plate Load Testing
The second test is the incremental plate load. This is used to measure the vertical deformation and strength of the in-situ soil. It assesses the force and amount of penetration and the time taken for a rigid plate to penetrate into the ground.
This test method is widely used when establishing the strength of crane bases, piling pads or crane outriggers, as well as foundations for building slabs or commercial building stanchion bases, to ensure the required loading can be achieved.
Simtec has successfully delivered services to the construction and civil engineering industry since 2007. We are proud of our high level of customer service and integrity. We have a proven track record which has contributed to our growth in the sector. Contact us today, using the form, to find out more about our field testing services and how we can help you keep your project on track and within budget.
What is the maximum particle size you can measure in a CBR test?
A CBR value is usually represented as a percentage. A Clay usually achieves around 2% with compacted or undisturbed sands up to around 10%. A well compacted sub-base should achieve 30% CBR and above. For particle sizes larger than 20mm you will need to look for Plate Bearing Tests.
How can I ensure the testing format carried out will be accepted by all UK Government agencies including Highways England and local authorities?
By using Simtec a UKAS accredited testing organisation, results will be accepted by all UK Government agencies including Highways England and local authorities.
Do weather conditions affect testing?
Weather does not adversely affect testing, however rain over a prolonged period will distort CBR values. Avoid testing when the surface is frozen or affected by frost and snow or is saturated.
How long does it take to do a CBR test?
Testing at each location typically lasts 30 mins. Individual test duration will vary according to the ground conditions.
Fast, accurate assurance when you need it.
The grease-in-the-wheels of the construction industry, ensuring work progresses at pace with unnecessary costs avoided. Simtec has been a trusted name in construction materials testing since 2007. They have built a professional, practical, and methodical business culture from the top down.
A simple approach
Simtec believes that shared knowledge is the foundation on which everyone progresses. Having documented and routinely shared best practices with partners and clients to minimise everyone’s exposure to risk.
Every contract is measured against the Simtec Optimum Compliance Benchmark data. This data consists of best practice criteria to help clients achieve high compliance approval. It also helps to avoid costs of delay or remedial work.
Simtec's integrity, rigour and safeguarding have earned them trust as a testing partner among UK construction companies. This has established Simtec as a reliable and trusted partner.