This standard is issued under the fixed designation D; the number 1 This test method is under the jurisdiction of ASTM Committee D18 on Soil and. This standard is issued under the fixed designation D ; the number 1 This test method is under the jurisdiction of ASTM Committee D on Soil and Rock. GeoTesting Express is a provider of Soil Testing Services – ASTM D, Standard Test Method for CBR (California Bearing Ratio) of Laboratory- Compacted.

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It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design. Reporting of test results in units other than inch-pound units shall not be regarded as nonconformance with this test method. Density is mass per unit volume whereas unit weight is force per unit volume.

ASTM D Standard

The dry unit weight is usually given as a percentage of maximum dry unit weight determined by Test Methods D or D As the voice of the U. You may delete a document from your Alert Profile at any time. For applications where the d11883 of compaction water d18883 of CBR is small, such a cohesionless, coarse-grained materials, or where an allowance is made for the effect of differing compaction water contents in the design procedure, the CBR may be determined at the optimum water content of a specified compaction effort.

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After the density has been determined, the unit weight is calculated in SI or inch-pound units, or both.

We have no amendments or corrections for this standard. Active view current version of standard.

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While traditionally this method of specimen preparation has been used to avoid the error inherent in testing materials containing large particles in the CBR test apparatus, the modified material may have significantly different strength properties than the original material. It is beyond the scope of this d188 to consider significant digits used in analytical methods for engineering design. In this standard, density is given only in SI units.

This standard is not included in any packages. Consequently, more trials may be required for these materials to establish a reliable CBR. Link to Active This link will always route to the current Active version of the standard. It is scientifically undesirable to combine the use of two separate sets of inchpound units within a single standard. The SI units given in parentheses are mathematical conversions, which are provided for information purposes only and are not considered standard.

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The CBR value obtained in this test forms an integral part of several flexible pavement design methods.

As directed by the client, self-cementing materials shall be properly cured until bearing ratios representing long term service conditions can be measured. As directed by the engineer, self cementing materials shall be properly cured until bearing ratios representing long term service conditions can be measured.

Consequently, more trials may be required for these materials to establish a reliable CBR. The dry unit weight is usually given as a percentage of maximum dry unit weight determined by Test Methods D or D Standards Subsctiption may be the perfect solution.

However, a large experience base has developed using this test method for materials for which the gradation has been modified, awtm satisfactory design methods are in use based on the results of tests using this procedure. For more information, contact: Link to Active This link will always route to the current Active version of the standard.

California Bearing Ratio Load Frames, CBR, ASTM D

Subscription pricing is determined by: The dry unit weight specified is normally the minimum percent compaction allowed by the using agencys field compaction specification. In addition they are representative of the significant digits that generally should be retained.

While traditionally this method of specimen preparation has been used to avoid the error inherent in testing materials containing large particles in the CBR test apparatus, the modified material may have significantly different strength properties than the original material.

This test method is used to evaluate the potential strength of subgrade, subbase, and base course material, including recycled materials for use in road and airfield pavements.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The SI equivalents shown in parentheses may be approximate. You can download and open this file to your own computer but DRM prevents opening this file on another v1883, including a networked server. In this system, the pound lbf represents a unit of force weightwhile the unit for mass is slugs. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors.

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In this system, the pound lbf represents a unit of force weightwhile the unit for mass is slugs. For applications where the effect of compaction water content on CBR is unknown or where it is desired to account for its effect, the CBR is determined for a range of water content, usually the range of water content permitted for field compaction by using agencys field compaction specification.

However, a large experience database has been developed using this test method for materials for which the gradation has been modified, and satisfactory design methods are in use based on the results of tests using this procedure. The precision of this test method is dependent on the competence of the personnel performing it and the suitability of the equipment and facilities used.

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. Already Subscribed to this document. For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at While traditionally this method of specimen preparation has been used to avoid the error inherent in testing materials containing large particles in the CBR test apparatus, the modified material may have significantly different strength properties than the original material.

Please first log in with a verified email before subscribing to alerts. California bearing ratio, pavement subgrade, subgrade, pavement subbase, subbase, pavement base course, base course, pavement design, flexible pavements, bearing ratio, CBR. Reporting of test results in units other than inch-pound units shall not be regarded as nonconformance with this test method.

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