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原文传递 Evaluating a Simplified Method to Estimate Compaction of Soils and Aggregates.

题名：	Evaluating a Simplified Method to Estimate Compaction of Soils and Aggregates.
作者：	mchatti, r. brownwood, j.
关键词：	construction, densometer, density values, evaluation
摘要：	Southeast Region personnel of the Alaska Department of Transportation & Public Facilities (DOT&PF) have proposed a simplified method for estimating percent compaction of soil, aggregate, and asphalt concrete materials during construction. In simplest terms, percent compaction is obtained by dividing the field-measured dry density of a material by the maximum dry density of that same material, then multiplying the result by 100. Nowadays, field-measured density is usually determined by DOT&PF technicians with a nuclear moisture-density gauge (called nuclear density gauge or densometer in the following text), while the maximum, i.e., target density has been determined using any one of several standardized laboratory compaction tests. The Southeast Region percent compaction calculation proposes that aMAX might be estimated with reasonable accuracy without performing Alaska DOT&PFs WAQTC* versions of AASHTO T 99 / T 180 or ATM* 212 (for soil/aggregate materials) or WAQTC version of AASHTO T 209 (for asphalt concrete materials). The objective of this report is to identify the basic operating characteristics and limitations of the method. The report also addresses the potential for improving, i.e., optimizing the method so that it might consistently provide maximum density values closely matching those determined by standard DOT&PF methods. / Supplementary Notes: Sponsored by Federal Highway Administration, Juneau, AK. Alaska Div. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0820；22p
报告类型：	科技报告