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CN-122013575-A - High-performance non-resin-based bamboo rib and application thereof

CN122013575ACN 122013575 ACN122013575 ACN 122013575ACN-122013575-A

Abstract

The application relates to the field of civil engineering materials, in particular to a high-performance non-resin-based bamboo rib and application thereof, wherein the bamboo rib is formed by twisting bamboo filament bundles according to a steel strand twisting process, the bamboo filament bundles are formed by folded bamboo filaments, the twisting distance of the bamboo rib is 10-15 mm, the diameter of the bamboo filaments is 0.3-0.8mm, and the diameter of the bamboo filament bundles is 3-8mm. The application creatively reorganizes high-strength vascular bundles in natural bamboo materials through a pure physical stranding and forming process to form the full-bamboo resin-free high-performance rib material. The bamboo material not only maintains the natural salt and alkali corrosion resistance of the bamboo material, but also realizes the crossing type improvement of mechanical properties and the specification standardization through the structure recombination, thereby fundamentally avoiding the durable pain points of reinforcement corrosion and FRP rib resin degradation.

Inventors

  • HUANG DONGSHENG
  • Yue changcheng
  • LI QINGBIN
  • Qi shuang

Assignees

  • 中铁十八局集团有限公司
  • 南京格橹迪迈新材料技术工程有限公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (7)

  1. 1. The high-performance non-resin-based bamboo rib is characterized in that the bamboo rib is formed by twisting bamboo filament bundles according to a steel strand twisting process, the bamboo filament bundles are formed by folded bamboo monofilaments, the twisting distance of the bamboo rib is 10-15 diameters, the diameters of the bamboo monofilaments are 0.3-0.8mm, and the diameters of the bamboo filament bundles are 3-8mm.
  2. 2. The high-performance non-resin-based bamboo rib according to claim 1, wherein the bamboo monofilament is a part of 1/3-1/2 of the overall length of the bamboo in the middle section of the bamboo after the yellow bamboo is removed.
  3. 3. A high performance non-resin based bamboo reinforcement according to claim 1, wherein the strand lay pitch is 60-80mm.
  4. 4. The high performance non-resin based bamboo reinforcement of claim 1, wherein the bamboo reinforcement comprises a single layer strand structure or a multi-layer strand structure.
  5. 5. The high performance non-resin based bamboo reinforcement of claim 4, wherein the bamboo reinforcement comprises a structure of 1 x 7, 1 x 19.
  6. 6. A high performance non-resin based bamboo reinforcement according to claim 1, wherein the diameter of the bamboo filaments is 0.5-0.8mm and the diameter of the bamboo filament bundles is 5-6mm.
  7. 7. Use of a high performance non-resin based bamboo reinforcement according to any one of claims 1 to 6, wherein the bamboo reinforcement is used as reinforcement material for concrete elements including sea water environments, marine salt fog environments or saline-alkaline geological environments.

Description

High-performance non-resin-based bamboo rib and application thereof Technical Field The application relates to the field of civil engineering materials, in particular to a high-performance non-resin-based bamboo rib and application thereof. Background In coastal and ocean engineering, reinforced concrete structures are widely used because of their excellent mechanical properties and plasticity. However, chloride ions rich in the marine environment penetrate through the concrete protective layer and erode the steel bars inside, so that the steel bars are corroded and expanded in volume, and finally the concrete protective layer is cracked and peeled off, and the structural bearing capacity and durability are drastically reduced. This is a major durability problem faced by the global coastal infrastructure, resulting in significant maintenance and rebuilding costs. In order to solve the problem of corrosion of steel bars, fiber reinforced polymer bars (FRP bars) are becoming research hot spots. The FRP rib has the advantages of high strength, light weight and chloride ion corrosion resistance. However, the FRP rib has the obvious limitations that firstly, matrix resin (such as epoxy, unsaturated polyester and the like) is easy to hydrolyze and degrade in an overbased environment in the concrete, so that fibers and the matrix are debonded, the long-term performance attenuation is serious, and secondly, the FRP rib has high production energy consumption, depends on non-renewable petroleum resources, is difficult to degrade after being abandoned, and does not accord with the concept of green sustainable development. Therefore, there is a need to develop a new reinforcement that is both corrosion resistant and environmentally friendly and that can operate stably for a long period of time in alkaline environments. Bamboo wood is used as a natural biomass material, and has the advantages of quick growth, reproducibility, high strength, good toughness and unique microstructure. More importantly, the bamboo has good salt and alkali corrosion resistance, and chemical components (mainly cellulose, hemicellulose and lignin) of the bamboo are relatively stable in an alkaline environment. If the reinforced plastic material can be processed into a reinforced material form meeting engineering requirements, the double problems of steel bar corrosion and FRP reinforcement resin degradation in marine environment are expected to be fundamentally solved, and the unification of structural durability and environmental sustainability is realized. For bamboo application, the prior art mostly adopts direct application in concrete or uses after processing, however, the existing bamboo application has certain defects more or less, and the existing bamboo products and related defects are as follows: (1) The common bamboo strip/bamboo chip reinforced concrete is prepared by simply splitting bamboo into strips or sheets and directly embedding the strips or sheets into concrete. The method does not carry out deep homogenization treatment on the bamboo wood, has extremely unstable reinforcement performance, weak binding force with concrete, is easy to generate brittle failure and pull out, and cannot meet the predictable and designable requirements of modern structural engineering on the performance of the reinforced material. (2) Resin impregnation/wrapping bamboo ribs to improve bamboo properties, resin impregnation or surface wrapping of bamboo strips has been studied. Although the waterproof property and the binding force with concrete are improved to a certain extent, the resin matrix which is the same as the FRP rib is introduced, the fundamental problems of resin aging and degradation in the alkaline environment of the concrete cannot be solved, the cost and the production complexity are increased, and the original purpose of 'all-natural' corrosion resistance is overcome. (3) The bamboo fiber reinforced composite material is produced with bamboo material and through crushing into short fiber or powder, and compounding with resin and molding. The material belongs to the category of composite materials, the performance depends on a resin matrix, the reinforcing efficiency of short fibers is low, the continuous long fiber reinforcing effect with high strength and high modulus is difficult to obtain, and the material is not suitable for being used as a main bearing reinforcement. (4) The traditional bamboo rope/bamboo cable is formed by twisting a plurality of strands of thin bamboo strips or wires and is mainly used for non-structural or temporary purposes such as ropes, hoisting and the like. The preparation process is extensive, so that the tensile strength and the elastic modulus of the concrete are low, the creep is large, the dimensional stability is poor, and the long-term service requirement of a prestressed or high-performance concrete structure cannot be met completely. As can be seen, the existing bamboo used as the concrete