Electrically conductive concrete and controlled low-strength materials

摘要

Self-compacting cementitious compositions comprise (weight %) Portland cement (1-20), high carbon content fly ash (18-85), and water in an amount that produces a material having a compressive strength of = 8.3 MPa; and Portland cement (1-30), high carbon content fly ash (1-20), aggregate (40-90), and water in an amount that produces a concrete having a compressive strength of = 13.8 MPa. Self-compacting cementitious compositions consist of (A) Portland cement (1-20 wt.%), fly ash (18-85 wt.%), and water in an amount such that the composition sets to a material having a compressive strength of = 8.3 MPa; and (B) Portland cement (1-30 weight %), fly ash (1-20 wt.%), aggregate (40-90 weight %), and water in an amount such that the composition sets to a concrete having a compressive strength of = 13.8 MPa. The fly ash has a carbon content of greater than 12% (as measured by loss on ignition). The aggregate comprises sand, crushed stone and/or taconite pellets.