EARLY CURING BEHAVIOR OF CEMENT MODIFIED ASPHALT EMULSION MIXTURES

THE EFFECT OF ADDING SMALL AMOUNTS OF PORTLAND CEMENT TO ACCELERATE AND CONTROL THE SETTING TIME OF ASPHALT EMULSION MIXTURES WAS INVESTIGATED. CRUSHED, DENSE-GRADED AGGREGATE MATERIAL WAS MIXED WITH QUICK-SETTING EMULSION, SLOW-SETTING EMULSION, AND VARYING AMOUNTS OF TYPE I PORTLAND CEMENT, RANGING FROM 0 TO 3 PERCENT. SPECIMENS CURED IN COOL, WET CONDITIONS WERE OF PARTICULAR INTEREST BECAUSE OF THE UNPREDICTABLE CURING BEHAVIOR OF ASPHALT EMULSIONS IN SUCH WEATHER. IT WAS FOUND THAT PORTLAND CEMENT INCREASED THE RATE OF CURING AT ALL PERCENTAGES UP TO THREE PERCENT. THE PRESENCE OF THE CEMENT, HOWEVER, INCREASED THE STIFFNESS DURING MIXING. THE ADDITION OF CEMENT LARGELY OVERCAME THE EFFECTS OF ADVERSE (COOL, WET) CURING CONDITIONS AND IT INCREASED THE ULTIMATE OR MAXIMUM RESILIENT MODULUS OF THE ASPHALT MIXTURE BY 200 PERCENT. THE QUICK-SETTING EMULSION WAS BENEFITTED BY THE TREATMENT MORE THAN THE SLOW-SET EMULSION.

• Authors:
  • Terrell, R L
  • Wang, C K
• Conference:
  • Association of Asphalt Paving Technologists Proc
• Publication Date: 1971

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 108-25
• Serial:
  • Volume: 40

Subject/Index Terms

• TRT Terms: Bituminous mixtures; Cement additives; Concrete curing; Curing agents; Dense graded aggregates; Emulsified asphalt; Environment; Flexible pavements
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211745
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 15 1972 12:00AM