a permeable concrete

Abstract

The invention discloses a permeable concrete, which comprises 100-110 parts of coarse aggregate, 12-17 parts of cement, 11-12 parts of water, 2-3 parts of gypsum powder, 1.5 parts of slag and 1-3 parts by weight. Dura fiber, 4-6 parts of modified polypropylene particles; the modified polypropylene particles are SEBS modified particles. The permeable concrete of the invention has good freeze-thaw resistance, strong water permeability and excellent mechanical properties.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a permeable concrete. Background technique [0002] Permeable concrete is a lightweight porous concrete made of coarse aggregate, cement and water. It does not contain fine aggregate. The surface of the coarse aggregate particles is covered with a thin layer of cement slurry. The aggregate particles are in contact with each other. Bonded to form a honeycomb structure with uniform distribution of pores, which has the characteristics of air permeability, water permeability and light weight. It is used in engineering as light masonry, precipitation well pipe wall, drainage hidden pipe, drainage pavement, green porous concrete and porous concrete for purifying sewage, which can reduce surface runoff, replenish groundwater, purify water, absorb sound and reduce noise, and relieve urban The heat island effect, etc., have shown significant benefits in the environment, which is fully in line wit...

AI Technical Summary

Problems solved by technology

[0004] Because the bonding layer of permeable concrete is very thin, water can easily seep into the voids, so it is more prone to freeze-thaw damage and fatigue damage

The patent application number 201610038409.1 titled a freeze-thaw-resistant permeable concrete discloses a technical solution for adding rigid polypropylene fibers to the concrete. Although the freeze-thaw resistance of permeable concrete can be improved, the length of the rigid polypropylene fibers is relatively large. Affects the compatibility with cement, and the longer the steel fiber is, the easier it is to form an unstable pore structure, which affects the stability of the concrete; in the prior art, flexible polypropylene fibers are also added to improve the flexural resistance of the concrete, reducing the flexural coefficient , Filiform polypropylene fibers can be easily bonded to cement and have a strong grip, which can improve the flexural performance. However, the steel strength is low and the ability to transmit loads is poor, which has no effect on the compressive strength of concrete.

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