Proportion Examples Typical Austin area concrete with seasonally-adjusted proportions of portland cement and fly ash. Hot Weather Moderate Weather Cold Weather Cement 300 lbs. Fly ash 150 lbs. Your concrete supplier can advise you about the best mix for your job. All central Texas ready-mix suppliers offer flyash concrete.
Most suppliers provide it automatically, others give a choice.
A survey of Austin ready-mix suppliers found that all suppliers surveyed substituted 18 percent to 24 percent flyash for cement automatically. A number of buyers request 30 percent or more substitution. Burnett Rd., Bldg. N.E. Loop 410, Ste.