2results about How to "Limit width" patented technology

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.

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.