PROPRETIES OF EPOXY-CEMENT CONCRETE SYSTEMS

Blended epoxy systems have been added to several different cement concrete mixes to improve the strength and durability of the cement concrete. In a standard mix having a water- cement ratio of 0.4, adding epoxy up to 20 percent by weight of the cement mortar gave no improvement in tensile or compressive strength values. However, when a second group of test specimens were prepared in which the amount of water was reduced as epoxy was added so as to maintain essentially constant slump, both the tensile and compressive strengths were found to increase by over 90 percent for an added resin content of 15 percent. In a third series of tests, the cement-sand-aggregate ratio was held constant but the water was progressively replaced by the blended epoxy. For replacements over 50 percent, strength values increased noticeably and for specimens having water-cement ratio of 0.15 and epoxy-cement ratio of 0.52 the average tensile strength exceeded 1100 psi (77 kgf/sq cm) and the average compressive strength exceeded 9000 psi (633 kgf/sq cm). /Author/

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  • Accession Number: 00134043
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 23 1976 12:00AM