The present invention discloses concrete. The concrete comprises cement, a fine aggregate, a coarse aggregate, fly ash, water and a water reducing agent, wherein the fine aggregate is porous volcanic sand and the coarse aggregate is porous volcanic rocks. In terms of 1000 kg of the coarse aggregate, the amount of the cement is 300-500kg, the amount of the fine aggregate is 400-700kg, the amount of the fly ash is 20-40kg, the amount of the water is 80-200kg and the amount of the water reducing agent is 2-5kg. The compressive strength of the concrete is 46.5-71.7MPa and the elastic modulus is 39.2-42.4MPa; and the concrete has the advantages of excellent impact resistance and low cost.