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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>THE DEGRADATION OF ROADBASE AGGREGATES - RESULTS FROM LABORATORY TESTS</title>
      <link>https://trid.trb.org/View/74699</link>
      <description><![CDATA[Results from laboratory test methods were compared with the degradation that was found by sampling on road projects. Attempts were also made to study degradation by construction traffic on a test track.  In the laboratory tests the roadbase aggregates were exposed to impact compaction, closely corresponding to AASHTO T 180, and wearing action in a planetary-type mixer.  The tests were made at approximately optimum water content.  Insufficient fines are formed by the impact compaction tests compared with road conditions.  In comparison the fines are less plastic than in the road samples.  Wearing action for 10 minutes in the mixer produced approximately as many fines as found in the road and the plasticity of the fines corresponds better with the road samples.  The degradation of coarse particles is small.  The wet degradation test in a planetary-type mixer produces the most relevant results as the tendency to form fines is one of the most important quality criteria for roadbase aggregates.  The test must be made primarily on certain problematical aggregates.  For avoiding unnecessary testing, an aggregate classification is suggested and aggregate properties of the different classes are discussed. /TRRL/]]></description>
      <pubDate>Wed, 27 Sep 1978 00:00:00 GMT</pubDate>
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      <title>1973 INSPECTION OF EXPERIMENTAL MARINE PILING</title>
      <link>https://trid.trb.org/View/14083</link>
      <description><![CDATA[The cooperative and NCEL experimental piles in Pearl Harbor, Hawaii and the cooperative piles in Coco Solo, Canal Zone were inspected in January and March 1973, respectively. Of the 120 piles that were inadvertently removed from test in August 1972 at Pearl Harbor, about half were redriven in May 1973. They showed that Martesia attack was greatest at the intertidal zone and that Limnoria attack was frequently greatest at the mud line. Cupro-nickel sheathing was severely corroded with large perforations at about the mid-exposure zone. (Author)]]></description>
      <pubDate>Mon, 25 Mar 1974 00:00:00 GMT</pubDate>
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