INVESTIGATION OF COLORLESS AND WATER-BASED CONCRETE CURING COMPOUNDS

ELEVEN COMPOUNDS DESIGNATED AS COLORLESS AND TWO DESIGNATED AS WATER-BASED WERE EVALUATED FOR THEIR SUITABILITY FOR CURING OF CONCRETE AND FOR THEIR LACK OF COLOR. ALL MET PRESENT REQUIREMENTS FOR SPRAYABILITY, DRYING TIME, AND FLASH POINT. ONLY TEN MET THE MOISTURE-RETENTION REQUIREMENTS. ONE COLORLESS TYPE AND BOTH WATER-BASED COMPOUNDS FAILED THE MOISTURE TEST. AN INFRARED SPECTROPHOTOMETER WAS USED TO IDENTIFY AND CHARACTERIZE EACH OF THE MATERIALS. INFRARED ANALYSIS REVEALED THAT THE 11 COLORLESS MATERIALS REPRESENT 5 DIFFERENT CHEMICAL CLASSES; BOTH WATER-BASED MATERIALS WERE IDENTIFIED AS SODIUM SILICATE LIQUIDS. INFRARED MEASUREMENTS WERE USED TO DETECT CHEMICAL AND PHYSICAL CHANGES OF THE COLORLESS MATERIALS WHEN EXPOSED TO LABORATORY CONDITIONS AND NATURAL SUNLIGHT. GENERALLY, MORTAR SPECIMENS COATED WITH THE CURING COMPOUNDS LIGHTENED IN COLOR WHEN SUBJECTED TO BOTH A CONTROLLED TEMPERATURE-HUMIDITY CABINET AND ULTRAVIOLET RADIATION IN A WEATHEROMETER. HOWEVER, UPON BEING SUBJECTED TO ALTERNATE CYCLES OF RAINFALL AND ULTRAVIOLET RADIATION IN THE WEATHEROMETER, SOME OF THE COATED SURFACES CONTINUED TO LIGHTEN AND THE CURING COMPOUNDS WASHED OFF, WHILE SOME BECAME MOTTLED AND UNATTRACTIVE. THERE WAS NO CORRELATION BETWEEN ORIGINAL COLOR OF THE CURING COMPOUND AND COLOR OF THE COATED MORTAR SURFACES EITHER BEFORE OR AFTER EXPOSURE. MORTAR SURFACES COATED WITH TWO OF THE CARBOXYLATED HYDROCARBONS POSSESSED A DULL FINISH AND APPEARED MORE NATURAL LOOKING WITH FEWER SIGNS OF MOTTLING THAN ANY OF THE OTHER COATED SURFACES. /AUTHOR/

  • Supplemental Notes:
    • No C-69-7, 63 PP
  • Authors:
    • Derrington, C F
  • Publication Date: 1969-6

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Filing Info

  • Accession Number: 00213427
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 19 1970 12:00AM