Full Description 1. The expansion index, EI, provides an indication of swelling potential of a soil. The values given in parentheses are provided for information only and are not considered standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard. In the system, the pound lbf represents a unit of force weight , while the units for mass is slugs.
|Country:||Saint Kitts and Nevis|
|Published (Last):||16 April 2005|
|PDF File Size:||20.9 Mb|
|ePub File Size:||6.90 Mb|
|Price:||Free* [*Free Regsitration Required]|
More D It may also be used to determine the suitability of a soil to satisfy requirements set by specifying agencies. However, consistent test conditions are used in preparation of compacted specimens such that direct correlation of data can be made. The ability to test intact specimens for measuring one-dimensional wetting-induced swell or collapse is also covered in Methods D Users of this standard are cautioned that compliance with Practice D does not in itself assure reliable results.
Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Scope 1. The expansion index, EI, provides an indication of swelling potential of a soil. The values given in parentheses are provided for information only and are not considered standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard.
In the system, the pound lbf represents a unit of force weight , while the units for mass is slugs. This practice implicitly combines two separate systems of units; the absolute and the gravitational systems. It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard.
Density is mass per unit volume, whereas unit weight is force per unit volume. In this standard, density is given only in SI units. After the density has been determined, the unit weight is calculated in SI or inch-pound units, or both. In addition, they are representative of the significant digits that generally should be retained. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering data.
These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Foundation construction. DOI:
Dotaur The values stated in inch-pound units are approximate. Agencies which meet the criteria of Practice D are generally considered capable of competent testing. The EI test is not used to duplicate any particular field conditions such as soil density, water content, loading, in-place soil structure, or soil water aetm. Note 2—Notwithstanding the statements on precision and bias contained in this test method: Agencies which meet the criteria of Practice D are generally considered capable of competent testing. Link to Active This link will always route to the current Active version of the standard.
More D When present, they result from contamination in some manner, such as disposal of chlorinated solvent used in many dewaxing pipeline or other equipment operations. Some compounds break down during fractionation and produce hydrochloric acid, which has a corrosive effect. Some compounds survive fractionation and are destroyed during hydro-treating desulfurization of the naphtha. Hydrochloric acid can be produced in hydrotreating or reforming reactors and the acid accumulates in condensing regions of the refinery. Unexpected concentrations of organic chlorides cannot be effectively neutralized and damage can result. Organic chlorides are not known to be naturally present in crude oils and usually result from cleaning operations at producing sites, pipelines, or tanks.
ASTM D4829 PDF