A manufactured cementitious binder including a hydraulic binder in an amount in the range of from about 40 to 75% by weight of the cementitious binder; metakaolin in an amount in the range of from about 1 to 30% by weight of the cementitious binder; silica fume in an amount up to about 15% by weight of the cementitious binder; lime kiln dust in an amount of from about 5 to 30% by weight of the cementitious binder, and a cementitious accelerator in an amount greater than about 0.1% by weight of the cementitious binder, wherein the cementitious binder provides a cementitious settable composition, when added with water and without a lightweight additive, that has a density lower than about 13 pounds per gallon and greater than about 11 pounds per gallon and a 24 hour compressive strength at 100 F, as hardened, of at least 500 psi.