High-permeability pervious concrete cementing agent and preparation method and application thereof

Abstract

The invention relates to a high-permeability pervious concrete cementing agent which is characterized by comprising the following components in parts by weight: 2-3 parts of furfural acetone resin, 100 parts of cement, 4-6 parts of epoxy resin, 1-2 parts of solidifying agent and 2-4 parts of toughening agent, wherein the cement is 42.5-grade ordinary portland cement; the furfural acetone resin comprises furfural and acetone; the epoxy resin is commercially available E-44; the toughening agent is polyurethane synthesized by utilizing water-soluble toluene 2,4-diisocyanate and trimethylolpropane; the solidifying agent is mixed polyamine of m-xylylenediamine and epoxy chloropropane at a ratio of 1:1. The invention also relates to a preparation method of the high-permeability pervious concrete cementing agent and application of the high-permeability pervious concrete cementing agent in a pervious concrete product. The high-permeability pervious concrete cementing agent disclosed by the invention has the advantages of very good compressive strength and permeability and very high practical value and can meet various requirements on the perviousness of the pervious concrete.

Description

technical field [0001] The invention belongs to the technical field of construction, in particular to a high-permeability permeable concrete cementitious agent and its preparation method and application. Background technique [0002] The traditional urban concrete pavement blocks the exchange of water and air due to the condensation of mortar, and most of the surface runoff flows into the river through the drainage channel. This not only increases the cost of municipal facilities, but also easily causes flood disasters, and the urban groundwater cannot be well obtained. The resupply, the ground drops, and the city heats up. [0003] Permeable concrete, also known as porous concrete, is characterized by the use of single-grain extremely coarse aggregate as the skeleton, and a thin layer of cement mortar wrapped on the surface of the coarse aggregate particles, which acts as a cementing layer between the aggregate particles to form a skeleton-pore structure. porous concrete...

AI Technical Summary

Problems solved by technology

The cement of traditional permeable concrete uses high-strength Portland cement as the bonding material. The disadvantages of this cement are: long construction period, relatively large secondary pollution, pollution of the construction environment and decoration waste, etc., cost also higher

Cement is a brittle material, its tensile strength is much smaller than its compressive strength, it is prone to plastic cracking and poor toughness

Therefore, epoxy resin is used as a reinforcing agent in many cementing materials. There are many active groups in the epoxy resin molecule, which are easy to form a network structure under the action of the curing agent, but the problem in practical application of this cementing agent is that : Due to the oil stains on the surface of homogeneous crushed stones, the affinity of epoxy resin to stones is poor; when the epoxy adhesive is not toughened, the cured product is generally brittle, with poor peeling, cracking and impact resistance; Materials with low resistance have low adhesion, and surface activation treatment must be carried out first.