ASTM D4429-93 - 1.1.1993
 
1. Scope

1.1 This test method covers the determination of the California Bearing Ratio (CBR) of soil tested in place by comparing the penetration load of the soil to that of a standard material. This test method covers the evaluation of the relative quality of subgrade soils, but is applicable to subbase and some base-course materials. This test method is designed to test in-situ materials and corresponds to Test Method D1883.

1.2 The values stated in inch-pound units are to be regarded as the standard.

1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use .

 
2. Referenced Documents

D1883-21

Standard Test Method for California Bearing Ratio (CBR) of Laboratory-Compacted Soils

D2167-15

Standard Test Method for Density and Unit Weight of Soil in Place by the Rubber Balloon Method (Withdrawn 2024)

D2216-19

Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass

D2937-24

Standard Test Method for Density of Soil in Place by the Drive-Cylinder Method

D6938-23

Standard Test Methods for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)

D6026-21

Standard Practice for Using Significant Digits and Data Records in Geotechnical Data

D653-26a

Standard Terminology Relating to Soil, Rock, and Contained Fluids (Includes all amendments and changes 6/15/2026).

D6780-05

Standard Test Method for Water Content and Density of Soil in Place by Time Domain Reflectometry (TDR)

D1556-07

Standard Test Method for Density and Unit Weight of Soil in Place by the Sand-Cone Method

D3740-26

Standard Practice for Minimum Requirements for Agencies Engaged in Testing of Soil and Rock as Used in Engineering Design and Construction