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3results about How to "Limit width" patented technology

Fiber-modified concrete segments suitable for dual control of micro and macro cracks and their preparation method

ActiveCN121651789BAchieve whole-process collaborationlimit widthDischarging arrangementUnderground chambersCrude fibreSteel fibre
This invention belongs to the field of concrete building materials technology, and discloses a fiber-reinforced concrete segment suitable for dual control of micro-cracks and macro-cracks, and its preparation method. The fiber-reinforced concrete segment comprises cement-based concrete and crack-resistant fibers and structural fibers compositely added to the cement-based concrete. The crack-resistant fibers are fine steel fibers with a diameter of 0.15-0.25 mm and a length of 10-15 mm; the structural fibers are coarse polypropylene fibers with a diameter of 0.8-1.2 mm and a length of 40-60 mm; the volume fraction of the crack-resistant fibers is 0.5%-0.8%; and the volume fraction of the structural fibers is 0.5%-0.9%. The fiber-reinforced concrete segment provided by this invention can achieve continuous crack control, synergistic effect, and better economic efficiency.
Fiber-modified concrete segments suitable for dual control of micro and macro cracks and their preparation method
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Owner:中铁科学研究院集团有限公司

A self-healing grouting material, its preparation method and application

PendingCN122079564AReduce direct damageImplement adaptive blockingMining devicesDrilling compositionMicroorganismChemical admixture
This invention provides a self-healing grouting material, its preparation method, and its application. By weight, the raw materials of the self-healing grouting material include the following components: 100 parts of cementitious material; 40-80 parts of water; 5-40 parts of polypropylene fiber-diatomite composite microbial carrier; 0-40 parts of mineral admixtures; and 0-5 parts of chemical additives. The polypropylene fiber-diatomite composite microbial carrier comprises a polypropylene fiber core layer and a diatomite gel shell layer. The diatomite gel shell layer is a gel network structure with embedded porous diatomite particles loaded with microorganisms. This invention solves the problem of insufficient timeliness of water-blocking performance in rock strata grouting in existing technologies, achieving long-term, adaptive sealing of seepage channels in rock strata fissures, and effectively enhancing the durable water-blocking capacity and overall stability of modified rock strata.
A self-healing grouting material, its preparation method and application
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Owner:CHINA UNIV OF MINING & TECH

A garment binding tape and method of use

ActiveCN116163066Blimit widthincrease the lengthWork-feeding meansOrnamental textile articlesStructural engineeringMechanical engineering
The application relates to the technical field of clothing edge covering, in particular to a clothing edge covering tape which comprises a tape body and fixed-length teeth, the thickness of the tape body is 0.1-1 mm, multiple fixed-length teeth are uniformly and intervally distributed along one side edge of the tape body, and the length of the fixed-length teeth is equal to the length of the required edge covering; one end of the fixed-length teeth is fixed with the tape body, the other end of the fixed-length teeth extends in a direction away from the tape body and is perpendicular to the edge of the tape body connected with the fixed-length teeth, and the fixed-length teeth are arranged in parallel to the tape body. The application also discloses a use method of the clothing edge covering tape. The application has the effect of accurately limiting the edge covering width in the process of edge covering.
A garment binding tape and method of use
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Owner:ZHENGZHOU YERAD GARMENTS