Need a concrete landing for a set of stairs in a hurry? Quikrete says its Q-Max Pro is the only concrete mix with one-hour working time, three-hour walk-on time, and an eventual compressive strength of 6,500 pounds per square inch. The concrete contains alkaline-resistant fiberglass fibers for crack resistance and an air-entraining admixture to improve workability and provide resistance to freeze-thaw damage. When applied in a minimum thickness of 2 inches, Q-Max reaches 1,000 psi in three hours, 3,000 psi in 24 hours, and 6,500 psi in 28 days. It’s sold in 80-pound bags for about $10. Q-Max was introduced at the World of Concrete show in Las Vegas in February. Quikrete, 800.282.5828,