CBR Testing by Perry Ltd
CBR was developed by the California Division of Highways for assessing the load-bearing capacity of soil and aggregate materials.
CBR testing https://www.perry-ltd.com/services/in-situ-construction-materials-testing/cbr-testing-california-bearing-ratio/ involves compacting a soil sample within a mould under specified conditions of moisture and density. A plunger is then used to apply a load to the soil at a controlled rate. The test measures the pressure required to penetrate the soil with the plunger at a specific depth and compares it to the pressure needed to penetrate a standard material, usually crushed stone.
The ratio of the measured pressure to penetrate the soil to the pressure required for the standard material is the California Bearing Ratio. It indicates the relative strength of the soil or aggregate material and its ability to support loads. The CBR value is typically expressed as a percentage and is used in pavement design to assess the material's suitability for supporting traffic loads without excessive deformation or failure.
A higher CBR value implies better strength and load-bearing capacity, indicating a material that can withstand greater pressure without deforming. Engineers use CBR values to determine the appropriate design and thickness of pavement layers needed to support anticipated traffic loads, ensuring durable and stable roadways.
CBR testing https://www.perry-ltd.com/services/in-situ-construction-materials-testing/cbr-testing-california-bearing-ratio/ involves compacting a soil sample within a mould under specified conditions of moisture and density. A plunger is then used to apply a load to the soil at a controlled rate. The test measures the pressure required to penetrate the soil with the plunger at a specific depth and compares it to the pressure needed to penetrate a standard material, usually crushed stone.
The ratio of the measured pressure to penetrate the soil to the pressure required for the standard material is the California Bearing Ratio. It indicates the relative strength of the soil or aggregate material and its ability to support loads. The CBR value is typically expressed as a percentage and is used in pavement design to assess the material's suitability for supporting traffic loads without excessive deformation or failure.
A higher CBR value implies better strength and load-bearing capacity, indicating a material that can withstand greater pressure without deforming. Engineers use CBR values to determine the appropriate design and thickness of pavement layers needed to support anticipated traffic loads, ensuring durable and stable roadways.
