Concrete for cast-in-place pile and preparation method thereof

The invention discloses concrete for a cast-in-place pile and a preparation method of the concrete. The concrete for the cast-in-place pile is prepared from the following raw materials in parts by weight: 30 to 50 parts of fiber modified recycled concrete, 105 to 175 parts of cement, 200 to 250 parts of aggregate, 4 to 8 parts of admixture and 70 to 90 parts of water, the fiber-modified recycled concrete is prepared from the following raw materials: fibers, a silane coupling agent and recycled concrete, the weight ratio of the fibers to the silane coupling agent to the recycled concrete is (0.03-0.07): 0.02: 1; the fibers comprise basalt fibers, acrylic fibers, polypropylene fibers and glass fibers; wherein the weight part ratio of the basalt fiber to the acrylic fiber to the polypropylene fiber to the glass fiber is (2-3): 1: (4-5): (2-3). The concrete provided by the invention has the advantages of high compressive strength and strong corrosion resistance. 本申请公开了一种用于灌注桩的混凝土及其制备方法，所述用于灌注桩的混凝土按重量份包括如下原料：纤维改性的