TESTS OF CERTAIN CEMENTS AND CEMENT BLENDS, REGARDING THEIR SUITABILITY FOR CONCRETE CONSTRUCTION

LABORATORY TESTS WERE PERFORMED ON MIXES CONTAINING UNIVERSAL ATLAS PORTLAND CEMENTS, STATE LINE FLY-ASH, AND LOUISVILLE NATURAL CEMENT. THESE TESTS WERE CONDUCTED TO COMPARE CERTAIN PHYSICAL AND CHEMICAL PROPERTIES OF CONCRETE MADE WITH TYPE I AND TYPE II PORTLAND CEMENTS WITH CONCRETE MADE WITH SUCH PORTLAND CEMENTS AND FLY-ASH AND NATURAL CEMENT SUBSTITUTED FOR A PORTION OF THE PORTLAND CEMENT. THIS COMPARATIVE TEST DATA WAS DESIRED TO AID IN SELECTING THE PROPER TYPE OF PORTLAND CEMENT OR BLEND TO BE USED IN THE CONSTRUCTION OF ROADS, STRUCTURES, AND SEWERS AND SEWAGE TREATMENT PLANTS IN THE CHICAGO AREA. THE FOLLOWING TESTS WERE PERFORMED: COMPRESSION TEST, FREEZING AND THAWING TEST, VOLUME CHANGE TEST, ABRASION TEST, HEAT OF HYDRATION, SODIUM SULFATE TEST AND SULFURIC ACID TEST. THE BLENDED CEMENT MIXTURES WERE NOT ANY MORE ADVERSELY AFFECTED BY LOWER CURING TEMPERATURES THAN THE TYPE I AND TYPE II PORTLAND CEMENT MIXES TESTED. BLENDED CEMENT MIXTURES SIMILARLY CURED COMPARED FAVORABLY WITH STRAIGHT PORTLAND CEMENT EXCEPT AT EARLY AGES. A MANDATORY REQUIREMENT FOR PRODUCING CONCRETE RESISTANT TO THE ATTACK OF FREEZING AND THAWING WAS A SUFFICIENT AMOUNT OF PURPOSEFUL AIR-ENTRAINMENT. FLY-ASH WAS SHOWN TO HAVE A HEAT EVOLUTION CONSIDERABLY LESS THAN THE PORTLAND AND NATURAL CEMENTS. USING FLY-ASH AS AN ADMIXTURE, HOWEVER, INCREASES THE HEAT PRODUCING MATERIAL IN THE MIXTURE SO THAT MORE HEAT IS PRODUCED IN HYDRATING. CEMENT BLENDS OF TYPE I PORTLAND CEMENT WITH FLY-ASH OR NATURAL CEMENT PROVE TO BE MORE RESISTANT THAN MIXES MADE ENTIRELY OF STRAIGHT TYPE I PORTLAND CEMENT IN THE SODIUM SULFATE TEST. THE SULFURIC ACID TEST RESULTS CORROBORATE THE FINDINGS OF THE SODIUM SULFATE TEST. IT IS CONCLUDED THAT CONCRETE CONTAINING TYPE I PORTLAND CEMENT AND SUFFICIENT AIR-ENTRAINMENT SATISFIES THE COMPRESSION STRENGTH AND RESISTANCE OF FREEZING AND THAWING REQUIREMENTS AND PROVIDES SUFFICIENT EARLY STRENGTH TO PERMIT THE PAVEMENT TO BE OPENED TO TRAFFIC AT THE EARLIEST POSSIBLE TIME. WHEN THERE IS NO GREAT URGENCY TO OPEN HIGHWAYS TO TRAFFIC, AND EARLY STRENGTH REQUIREMENTS ARE NOT REQUIRED, A BLENDED MIX OF TYPE I PORTLAND CEMENT AND FLY-ASH MAY BE MORE ECONOMICAL.

  • Supplemental Notes:
    • Report No BR 163, 41 PP, 13 TAB
  • Corporate Authors:

    Chicago Conf Com On Concrete Tests

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  • Publication Date: 1953-6

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Filing Info

  • Accession Number: 00212707
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 1 1994 12:00AM