COST VS MIXING TIME ON DUAL-DRUM PAVING

MANY PAVING CONTRACTORS CAN CONSISTENTLY PRODUCE PORTLAND CEMENT WITH CONTROLLED MIXING TIME IN THE RANGE OF 35 TO 45 SEC. THE INCREASED TEMPO REQUIRED FOR OPERATING A PAVER WITH A SHORT CYCLE AND THE CONSEQUENT SHORT MIXING TIMES HAS BEEN ACHIEVED IN PART THROUGH USE OF LARGER AND FASTER BATCH TRUCKS HAVING GREATLY IMPROVED STABILITY DURING BATCH DUMPING OPERATIONS AT THE SKIP. ANOTHER ESSENTIAL ELEMENT IN ACHIEVING INCREASED PRODUCTION HAS BEEN THE CONTRACTOR'S DEMONSTRATED AWARENESS OF THE IMPORTANCE OF ELIMINATING UNNECESSARY TIME LOSSES WHICH EAT UP VALUABLE PRODUCTION TIME. TECHNOLOGICAL ADVANCEMENTS IN SUPPORTING EQUIPMENT HAVE HELPED TO MAINTAIN THE STEPPED-UP PACE. SAVINGS RANGING FROM 10 CENTS TO $3.08 A CUBIC YARD ARE INDICATED IF ALL MIXING TIME SPECIFICATIONS ARE REDUCED TO 45 SEC. BELOW 45 SEC THE SAVINGS ARE LESS THAN 10 CENTS PER CU YD FOR EACH 5-SEC REDUCTION. QUALITY, OF COURSE, IS AN IMPORTANT CONSIDERATION IN DEALING WITH MIXING TIME PROBLEMS. /AUTHOR/

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  • Accession Number: 00215100
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Apr 28 1994 12:00AM