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Wet and dry density of soils are important values for geotechnical engineers in determining over-burden stresses, void ratios, maximum compaction and percent compaction of soils. Density value can also aid in the evaluation of soil strength and sensitivity. While reporting on soil density has been part of routine laboratory testing for years, there have been no standards that outlined procedures…
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The Fourth International Symposium on Contaminated Sediments will be held June 30-July 2, 2009, at Trinity College in Dublin, Ireland. The symposium is sponsored by ASTM International Committee D18 on Soil and Rock and Trinity College in cooperation with the Engineers Ireland, Canadian Civil Engineering Society (CSCE) and the Canadian Geotechnical Society (CGS). The symposium is a forum for the…
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Responding to requests from industry, ASTM International Committee D18 on Soil and Rock is developing a proposed new standard for measuring rock abrasivity, which will aid mechanical excavation projects in several ways. The proposed standard, ASTM WK22313 , Test Method for Laboratory Determination of Abrasivity of Rock Using the CERCHAR Method, is under the jurisdiction of Subcommittee D18.12 on…
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ASTM International Committee F17 on Plastic Piping Systems is currently developing an efficient means to standardize fabricated polyvinyl chloride pressure fittings that are used in a variety of piping applications. The proposed new standard, WK23931 , Specification for Fabricated PVC Pressure Fittings, is under the jurisdiction of Subcommittee F17.10 on Fittings. Some of the applications that…
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A type of testing that can aid in predicting soil and foundation response to seismic and manmade disturbances is covered in a proposed new ASTM International standard. The proposed standard, WK23118 , Test Method for Determination of Shear Wave Velocity by Bender Element, is being developed by Subcommittee D18.09 on Cyclic and Dynamic Properties of Soils, part of ASTM International Committee D18…
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Thermoplastic corrugated stormwater chambers are similar to other types of plastic piping systems in that they are subjected to significant live loads from surface traffic as well as dead loads from earth cover. However, differences in construction — specifically, the fact that chambers are open-bottomed arches — necessitate an understanding of how corrugated stormwater chambers behave…
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A proposed new standard that will allow for the joining of copper and plastic piping materials is currently being developed by ASTM International Committee F17 on Plastic Piping Systems. The proposed standard, WK21656 , Specification for Structural Adhesive for Bonding Similar and Dissimilar Piping Materials, is under the jurisdiction of Subcommittee F17.20 on Joining. “ WK21656 is the result of…
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A proposed new standard under the jurisdiction of ASTM International Committee F17 on Plastic Piping Systems will be useful to the gas gathering and distribution industries. Subcommittee F17.11 on Composite is developing the proposed standard, WK21276 , Specification for Polyethylene Pipe with a Co-Extruded Polyamide Inner and/or Outer Barrier Layer for Oil and Gas Applications. According to…
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ASTM Committee D18 on Soil and Rock is developing a proposed new standard, WK21484 , Practice for Nuclear Gauge Calibration. The proposed standard is under the jurisdiction of Subcommittee D18.08 on Special and Construction Control Tests. Dan Pratt, senior nuclear project physicist, Troxler Electronic Laboratories Inc., and D18 member, says that two motivating factors are guiding the development…
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Installers of plumbing systems using PEX and PE-RT polyethylene pipe will be the primary users of a new ASTM International standard approved by Committee F17 on Plastic Piping Systems. The new standard, ASTM F2735 , Specification for Plastic Insert Fittings for SDR9 Cross-Linked Polyethylene (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing, is under the jurisdiction of Subcommittee F17…