CBR tests to assess subgrade stiffness. Build roads that withstand the test of time.
Our California Bearing Ratio (CBR) testing service is designed to provide you with the critical information you need to make informed decisions. With our state-of-the-art equipment and experienced team, we ensure that you receive precise and dependable CBR values.
But what exactly is CBR testing, and why is it crucial? The California Bearing Ratio test measures the stiffness of the subgrade. By evaluating the ratio of the force required to penetrate the soil to a standard reference value, we can determine its suitability for road and pavement construction. This valuable information allows you to design roads that withstand the test of time.
Our priority is to deliver exceptional service that caters to your specific needs. We understand that every project is unique, and our expert team is here to guide you through the entire CBR testing process. From site assessment to analysis and reporting, we ensure a seamless experience that puts you at ease.
By choosing our team for your CBR testing needs, you gain access to a wealth of knowledge and expertise. Our commitment to accuracy, efficiency, and professionalism ensures that you receive results you can rely on.
Discover the Types of CBR Tests
We offer three reliable testing methods: the "Plunger" CBR test and the DCP (Dynamic Cone Penetrometer) test, and the Plate Load Equivalence CBR Test.
In the "Plunger" CBR test, we utilize a 50mm plunger that is gently pushed into the test surface. By comparing the resulting load for a standard penetration to a standard load/penetration, we can calculate the CBR value. Our experienced team operates a specialized 4x4 vehicle equipped with the necessary apparatus to conduct this test efficiently and accurately, following the guidelines outlined in BS1377-9:1990.
While the plunger test is effective for fine materials, it does have limitations when it comes to particles of larger sizes. To address this, a relationship has been developed based on the modulus of subgrade reaction obtained from the plate load test. This relationship allows us to provide equivalent CBR values for coarse granular materials, offering convenience and flexibility in our testing approach. For more information on plate loading testing, we encourage you to explore our dedicated page.
For projects that require a deeper assessment of multiple layers, especially when access is challenging, the DCP test is a preferred option. Using a metal cone and a sliding hammer, we drive the cone into the ground, achieving depths of up to 2 to 3 meters. By analysing the depth and the number of blows required for penetration at various strata, we can estimate the CBR value for each layer. This technique proves invaluable for pavement investigations and design in complex situations.
Our expert team is here to support you every step of the way. We understand the importance of accurate data in making informed decisions, and we are dedicated to providing you with reliable CBR values tailored to your specific materials and project requirements. Whether you opt for the "Plunger" CBR test or the DCP test, you can rely on our expertise and state-of-the-art equipment to deliver results you can trust.
Frequently Asked Questions - Our Top CBR FAQs
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