THE PRODUCTION AND LAYING OF ROADBASE MATERIALS CONSISTING OF CRUSHED ROCK-CHIPPINGS AND CRUSHED SAND MIXTURES
HERSTELLUNG UND EINBAU VON TRAGSCHICHTMATERIAL AUS SCHOTTER-SPLITT-BRECHSANDGEMISCHEN
FOR THE PRODUCTION OF STABLE ROAD BASES CONSISTING OF MINERAL AGGREGATE MIXES WITH AND WITHOUT A BINDER THE SINGLE GRAIN SIZES MUST EXIST IN THE CORRECT QUANTITIES DETERMINED BY SIEVE TESTS. THE CORRECT VOLUMETRIC ARRANGEMENT OF THE PARTICLES IS IMPORTANT FOR THE STABILITY OF THE GRAIN MIXTURE. THIS IS OBTAINED BY MIXING. TO ATTAIN THE WORKABILITY WATER MUST BE ADDED TO BINDER-FREE MINERAL MIXES AND THE WATER QUANTITY SHOULD BE CONTROLLED EXACTLY. UNIFORM DISTRIBUTION OF THE WATER IS IMPORTANT. INVESTIGATIONS HAVE SHOWN THAT THE HOMOGENITY OF A LAYER OF BINDER-FREE CRUSHED STONE MIX LAYED IS DETERMINED MAINLY BY THE MIX QUALITY DETERMINED AT THE WORKS AND CAN BE INFLUENCED VERY LITTLE NEITHER POSITIVELY OR NEGATIVELY BY LAYING. THE "TECHNICAL REGULATIONS AND GUIDE LINES FOR THE CONSTRUCTION OF ROAD BASES IN ROAD CONSTRUCTION (TVT), 1972" REQUIRE THEREFORE THAT THE MATERIAL IS PREPARED IN A CENTRAL MIXING PLANT, I.E. COMBINED DOSING, MIXING AND THE ADDITION OF WATER BEFORE LAYING. THE AUTHOR DISCUSSES THE PRACTICAL ASPECTS OF HOW THESE STEPS ARE PURPOSEFULLY CARRIED OUT, HOW IMPROVED BLENDING CAN BE ACHIEVED, HOW TO AVOID SEGREGATION AND WHEN AND HOW THE WATER SHOULD BE ADDED. FURTHERMORE, THE STAGES OF LAYING ARE DEALT WITH AND FREQUENTLY OCCURRING ERRORS ARE POINTED OUT. FOLLOWING THE BASIC RULES RESULTS IN THE PRODUCTION OF HOMOGENEOUS COURSES OF BINDER-FREE MINERAL MIXES, WHICH HAVE PROPERTIES WHICH WERE HITHERTO NOT APPRECIATED.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00281034
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Authors:
- Luecke, H
- Publication Date: 1978-7
Language
- German
Media Info
- Pagination: 7-10
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Serial:
- NATURSTEIN-IND
- Volume: 14
- Issue Number: 4
- ISSN: 0028-1034
Subject/Index Terms
- TRT Terms: Base course (Pavements); Chippings; Continuously graded aggregates; Crushed rock; Defects; Grain size (Geology); Mixers; Moisture content; Sand; Stability (Mechanics); Standards; Workability
- Uncontrolled Terms: Laying; Particle size distribution
- ITRD Terms: 4585: Chippings; 4598: Continuously graded aggregate; 4173: Crushed stone; 5238: Defect (tech); 3623: Laying; 3649: Mixer; 5920: Moisture content; 6200: Particle size distribution; 2961: Roadbase; 4105: Sand; 187: Specification (standard); 5930: Stability; 5941: Workability
- Subject Areas: I36: Aggregates;
Filing Info
- Accession Number: 01288973
- Record Type: Publication
- Source Agency: Forschungsgesellschaft für Straßen- und Verkehrswesen (FGSV)
- Files: ITRD
- Created Date: Nov 21 2010 1:34AM