Preparation method of anti-freezing polypropylene fiber aggregate recycled concrete

Abstract

The invention relates to a preparation method of anti-freezing polypropylene fiber aggregate recycled concrete. The preparation method comprises the following steps: step 1, preparation of a first rawmaterial, namely cleaning, airing and uniformly mixing and stirring river sand and stones to obtain the first raw material; step 2, preparation of a second raw material, namely dispersing polypropylene fiber blocks, and uniformly mixing and stirring the dispersed polypropylene fiber blocks with cement to obtain the second raw material; and step 3, uniformly mixing and stirring, namely uniformly mixing and stirring the first raw material, slag and fly ash by using a stirrer, adding the second raw material and a water reducing agent into the stirrer, and continuously and uniformly mixing and stirring; wherein the process of dispersing polypropylene fibers in the step 2 is completed by adopting an anti-freezing polypropylene fiber aggregate recycled concrete preparation device in a matchingmanner. By dispersing the polypropylene fiber blocks, the blocky polypropylene fibers are dispersed into fluffy polypropylene fibers, so that the polypropylene fibers are more uniformly distributed inthe concrete, and the use effect of the concrete is improved.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a preparation method of antifreeze polypropylene fiber aggregate recycled concrete. Background technique [0002] Concrete is a brittle material. Its shortcomings such as poor frost resistance, poor wear resistance, easy cracks, and poor deformation resistance affect its application in extreme external environments. With the development of science and technology, fiber-reinforced concrete has become one of the rapidly developing emerging composite building materials. Fiber-reinforced concrete has improved the performance of concrete in many ways, greatly improving the frost resistance, tensile strength, deformation ability and wear resistance of concrete. performance, impermeability and impact resistance, etc. Polypropylene fiber has the advantages of good dispersibility and anti-freezing and anti-corrosion, so it is widely added to concrete. At present, the follow...

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Problems solved by technology

[0004] The present invention provides a method for preparing recycled concrete with antifreeze polypropylene fiber aggregates, aiming to solve the following problems in the current preparation process of recycled concrete with antifreeze polypropylene fiber aggregates: polypropylene fibers in concrete form Existence, unable to distribute evenly in the concrete, resulting in uneven performance in the finished concrete product, affecting the overall use effect of the concrete

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