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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>A TENTATIVE SPECIFICATION FOR MINERAL SLAG ABRASIVE</title>
      <link>https://trid.trb.org/View/271782</link>
      <description><![CDATA[Abrasive blasting is a method for preparing steel surfaces prior to application of a protective coating.  It removes millscale, rust, paint, and other surface soils, providing a clean surface to which the coating can adhere.  Until recently the principal abrasive used in shipyards was sand. With the discovery that free silica creates a health hazard the use of sand as an abrasive has largely been discontinued.  Several different types of mineral abrasives are now used.  This article presents a tentative specification for mineral abrasives such as coal slag, copper slag, nickel slag or any slag mixtures which are suitable for removing rust, scale, old paint, and marine growths from ship hulls and tanks by blast cleaning.]]></description>
      <pubDate>Sun, 31 Aug 1986 00:00:00 GMT</pubDate>
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      <title>LAYING OF BITUMINOUS COMPOUNDS - OCCUPATIONAL SAFETY AND HEALTH</title>
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      <description><![CDATA[During 1973 and 1974, measurements and studies were made concerning occupational safety and health, ergonomics and work hygiene in conjunction with the laying of bituminous compounds and surface dressing. Work load is at times high when material has to be carried by hand. The most common complaints are due to the smoke and dust. Sample analysis shows that there is no danger of silicosis, but the smoke contains skin irritants and also carcinogens. Further tests are needed. Noise is so high at times that ear protection should be worn. There appears to be no risk of injuries due to whole-body vibration, but local injuries are likely to the hands and arms of drivers if contact with machinery is longer than 2 hours per working day. The findings must be related to the fact that this work is of a seasonal nature, and working periods are often long during the season. /TRRL/]]></description>
      <pubDate>Wed, 01 Dec 1976 00:00:00 GMT</pubDate>
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      <title>AB MATAKI, SWEDEN, GOES "ALL RUBBER"</title>
      <link>https://trid.trb.org/View/110502</link>
      <description><![CDATA[LOCAL ROCK IN SWEDEN IS A CAMBRIAN SANDSTONE WITH A VERY HIGH QUARTZ CONTENT. THE CRUSHING OF THIS ROCK CREATES TINY PARTICLES OF QUARTZ THAT ARE INVISIBLE AND REMAIN SUSPENDED IN THE AIR FOR SEVERAL DAYS. WORKERS' SUSCEPTIBILITY TO SILICOSIS MADE DUST SUPPRESSION AN ESSENTIAL FACTOR IN THE OPERATION. IN 1964 IT BECAME LAW IN SWEDEN THAT ALL WORKERS EXPOSED TO AN ENVIRONMENT WITH ANY DANGER OF SILICOSIS MUST WEAR RESPIRATORS AT ALL TIMES. A RESEARCH AND DESIGN TEAM WAS ESTABLISHED TO DESIGN A FULLY-AUTOMATIC PLANT THAT WOULD BE DUST FREE. WORK IS NOW CONDUCTED WITHOUT RESPIRATORS. RUBBER IS USED FOR TRUCK LININGS, AND LININGS OF ALL CHUTES AND HOPPERS IN THE CRUSHING PLANT. ALL CONVEYORS ARE OF THE NEW DESIGN OF MEDIUM-COARSE BELTING WITH A SYNTHETIC INLAY. THERE ARE TWO CORD INLAYS EMBEDDED IN A POLYESTER/POLYAMIDE MATRIX. COVERS ARE RUBBER, AND THERE IS A STIFFENING LAYER OF HEABY-DUTY FIBER-REINFORCED RUBBER BETWEEN THE INLAYS TO GIVE THE BELT BODY. AFTER CRUSHING, SCREENS OF A SPECIAL FRACTIONS FOR STORAGE IN APPROPRIATE HOPPERS. RUBBER SCREEN CLOTHS ARE USED THROUGHOUT THE PLANT.]]></description>
      <pubDate>Mon, 01 Jun 1970 00:00:00 GMT</pubDate>
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