Corps of Engineers in Corps of Engineers 5. When degradation occurs, the maximum dry-unit weight increases 1 so that the resulting laboratory maximum value is not representative of field conditions. Standards Subsctiption may be the perfect solution. The modified effort test see 3. Hereafter referred to as either soil or material.
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Results have been found to vary slightly when a material is tested at the same compactive effort in different size molds, with the smaller mold size typically yielding larger values of unit weight astm d1557 density.
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Laboratory compaction tests provide d15577 basis astm d1557 determining the percent compaction and molding water content needed to achieve the required engineering properties, and for controlling construction to assure that the required compaction and water contents are achieved.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Components of a method specification typically contain the type and size of compaction equipment to be used, the lift thickness, acceptable range of molding water content, and number of passes.
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astm d1557 It is beyond the scope of these test methods to consider significant digits used in analytical methods for engineering design. Your Alert Profile lists the documents that will be monitored. To handle these awtm voids, standard test methods laboratory or field typically have to be modified using engineering judgement. In addition, they are representative of the significant digits that generally should be retained.
ASTM D Standard
Standards Subsctiption may be the perfect solution. Other Usage If this gradation requirement cannot be met, then Method C may e1557 used. Often, in these cases, the maximum dry unit weight is impossible to achieve in the field.
Hereafter referred to as either soil or material. Degradation typically astm d1557 during the compaction of astm d1557 granular-residual soil or aggregate. If no method is specified, the choice should be based on the material gradation.
Corps of Engineers in Active view current version of standard. This implicitly combines two separate systems of units, that is, the absolute system and the gravimetric system. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Link to Active This link will always route to the current Active version of the standard.
If this test method is used for free-draining soils the maximum unit weight may not be well defined, and can be less than obtained using Test Methods D 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. In addition, they are representative of the significant digits that generally should be retained.
Already Subscribed to this document. Subscription pricing is determined by: In this case, the only advantages to using Method Astm d1557 rather than Method C are that a smaller amount of sample is needed and the smaller mold is easier to use. The equipment and procedures are the same as proposed by the U. 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.
Success in executing the compaction control of an earthwork project, especially when a method specification is used, is highly dependent upon the quality and experience of the contractor and inspector. The method used shall be as indicated in the specification for the material being tested.
It is scientifically astm d1557 to combine the use of two separate sets of inch-pound units within a single standard. In this system, the pound lbf represents a unit of force weight. Add to Alert PDF.
Your Alert Profile lists the documents that will be monitored. Referenced Documents astm d1557 separately The aztm listed below are referenced within the subject standard but are not provided as part of the standard.
If no method is specified, the choice should be based on the material gradation.