Concrete was mixed with cement: sand: stone chips: gravel ratio 1:0.65:0.85:3.04, water-cement ratio 0.46, water reducer content 0.3%, and rubber powder content 2%, 4%, 6% (mass percent of the concrete). When adding rubber powder, some sand with the same volume of rubber was replaced. Cubic concrete specimens with dimension 100 mm 100 mm 100 mm were prepared and cured in the standard curing conditions for 28 days before testing the compressive strength.