RAPID-HARDENING CONCRETE MIXES

Results of experimental investigation of the properties of rapid hardening concrete are presented. Three types of cements that can achieve 14 MPa compressive strength and 2.4 MPa modulus of rupture after 3 h at 22 deg. C and remain workable 10-15 min were selected based on an extensive literature review. The variables were: cement type; cement content; water cement ratio; use of admixtures; and temperature. The measured parameters were: strength gain with time; slump loss with time; workability; plastic and drying shrinkage; and relationship between compressive strength and modulus of rupture. Test results showed that for those selected cements it is possible to achieve a workable concrete having 14 MPa compressive strength and 2.4 MPa modulus of rupture after 3 h.

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  • English

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  • Accession Number: 00989478
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 2 2005 12:00AM