Hybrid fiber reinforced concrete
A reinforced concrete and hybrid fiber technology, which is applied in the field of concrete and hybrid fiber reinforced concrete, can solve the problems of reducing fiber strength, low bonding force, and reducing fiber reinforcement effect, so as to improve post-crack strength, toughness, and tensile strength The effect of flexural strength
Active Publication Date: 2016-07-20
殷石
View PDF4 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, polypropylene coarse fibers are hydrophobic and have low adhesion to concrete, thus greatly reducing the reinforcing effect of the fibers
In order to improve the bonding force between fibers and concrete, fibers are often subjected to heterogeneous treatment or surface indentation treatment, but this treatment will seriously reduce the strength of fibers
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] Preferred embodiments of the present invention are described in detail below.
[0021] A hybrid fiber reinforced concrete is prepared by mixing one or more of organic modifiers, silane coupling agents and inorganic modified fillers with polypropylene particles in proportion, and then melting and stretching to prepare modified polymeric concrete. Propylene coarse fibers; then add modified polypropylene coarse fibers and polymer fine fibers into the concrete and mix well until uniform; finally, pour the mixed mixed fiber concrete on the welded stress steel bars of the scaffolding and maintain for 28 days. Table 1 shows the specimen information of mixed fiber reinforced concrete, in which control group 1 is plain concrete, control group 2 is concrete reinforced with modified polypropylene coarse fibers, and control group 3 is concrete reinforced with polymer fine fibers; Table 2, 3 , 4 respectively characterize the flexural toughness, serviceability and durability of these...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses hybrid fiber reinforced concrete, that is to say, stressed reinforcing steel bars, modified polypropylene coarse fibers and polymeric fine fibers are used in the concrete in cooperation.The modified polypropylene coarse fibers are prepared through melt stretch after modification with an organic modifying agent, a silane coupling agent and an inorganic modifying filler.The polymeric fine fibers are capable of preventing the original concrete defects and microcrack expansion, and the modified polypropylene coarse fibers are capable of effectively limiting and delaying the occurrence and development of macrocracks.When the two fibers are used simultaneously in the concrete, the hybrid fiber reinforced concrete can have better shock resistance, crack resistance and abrasion resistance compared with constructional reinforcement, and replace the constructional reinforcement accordingly, and therefore, carbon emission generated during reinforcing bar production is significantly reduced.In addition, the two fibers are used in cooperation with the stressed reinforcing steel bars, the quality and durability of concrete work are greatly improved, and the service life of the concrete work is prolonged.
Description
technical field [0001] The invention belongs to the field of building materials and relates to concrete, in particular to a hybrid fiber reinforced concrete. Background technique [0002] Concrete is made by mixing cement, sand, gravel, water, and admixture materials and admixtures in a certain proportion. After solidification, it is as hard as a stone, and has good compressive capacity, but poor tensile capacity, and is easy to break due to tension. In order to solve this contradiction and give full play to the compressive capacity of concrete, a certain number of stressed steel bars are often added in the tensile area of concrete or corresponding parts, so that the two materials are bonded into a whole and jointly bear external forces. However, the unreinforced part of the concrete is still plain concrete, which will cause cracking and wear due to shrinkage, creep and external impact of the concrete. Concrete cracking will reduce the protection of the reinforced steel ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): C04B16/06C04B20/02
CPCC04B16/0608C04B16/0633C04B20/023C04B2111/20C04B2111/34
Inventor 石峰殷石
Owner 殷石