7results about How to "Controllable clotting time" patented technology

This invention discloses a water-resistant magnesium phosphate repair mortar based on industrial waste residue and its preparation method, comprising mineral admixtures, potassium dihydrogen phosphate, magnesium oxide, quartz sand, organosilicon gel, retarder, and mixing water; the mineral admixtures are composed of steel slag, nickel slag, and fly ash. During preparation, potassium dihydrogen phosphate, retarder, and mixing water are first mixed and stirred, then the mineral admixtures, magnesium oxide, and organosilicon gel are added sequentially and stirred rapidly, and finally the quartz sand is added and stirred. The repair mortar of this invention exhibits a setting time ≥23 min, fluidity ≥195 mm, 3-hour compressive strength ≥25.2 MPa, 3-day compressive strength ≥47.4 MPa, 3-hour flexural strength ≥3.6 MPa, 3-day flexural strength ≥6.1 MPa, and 1-day tensile bond strength ≥0.8 MPa; and a water absorption ratio below 0.15.

This invention relates to a two-component polymer sulfoaluminate cement grouting material for high-temperature geothermal environments, its preparation method, and its application, belonging to the technical field of grouting materials. The grouting material comprises component A and component B. By mass percentage, component A includes 90-95 parts sulfoaluminate cement, 5-10 parts silica fume, 0.15-0.20 parts water-reducing agent, 0.25-0.75 parts retarder, 0.50-0.80 parts defoamer, and 50-60 parts water; component B includes 1.32-4.17 parts water-based epoxy resin emulsion and 1.06-3.75 parts water-based epoxy curing agent. During preparation, the water-reducing agent and retarder in component A are first dissolved in water, then the remaining powder is added and stirred to form a slurry; component B is premixed uniformly; components A and B are then mixed on-site for use. This material is suitable for grouting reinforcement and water-blocking projects in high-temperature strata such as high-temperature tunnels and high-temperature mines.

The invention relates to the technical field of soft soil treatment, and discloses a curing agent for coastal soft soil and a manufacturing process of the curing agent. The process comprises the following steps: carrying out coarse and fine grading pretreatment on the furnace bottom slag, carrying out acid activation treatment on the zeolite powder, carrying out surface modification treatment on the basalt fiber, preparing a component A delayed coagulation curing agent, preparing a component B coagulation accelerating curing agent, and compounding the two components in proportion for use. The curing speed can be adjusted within 15-90 minutes by compounding the component A and the component B according to different mass proportions, and a double-phase structure of a rigid framework and a gelling matrix is formed by the surface modified basalt fibers and graded furnace bottom slag coarse particles. The rheological property of slurry is adjusted through selective ion adsorption of acid activated zeolite powder and molecular chain extension of hydroxypropyl methyl cellulose, and the technical problems that a coastal soft soil curing agent is large in brittleness, poor in construction adaptability, non-adjustable in curing speed and low in synergistic utilization rate of various solid wastes are solved.

The invention discloses a road building material prepared from pure ardealite and a preparation method of the road building material, and relates to the technical field of solid waste resource utilization and building materials. 3%-15% of sulphoaluminate cement; 0.01%-5.0% of an additive; the sulphoaluminate cement is co-produced by a process of decomposing phosphogypsum to prepare acid, the additive is a stabilizer and / or an adhesive, the stabilizer is one or more of metakaolin, silica fume or fly ash, and the adhesive is a high-molecular polymer. According to the road building material prepared from the pure ardealite and the preparation method, the total dosage of the ardealite tends to 100%, waste is turned into wealth in a real sense, and a revolutionary solution is provided for consumption of a large amount of the ardealite.

The invention relates to the technical field of building materials, in particular to a coupling coarse aggregate and a preparation method and application thereof.The coupling coarse aggregate takes waste tempered glass particles with the particle size of 5-40 mm as an inner core, the inner core is coated with a red mud-based cementing material layer with the thickness of 1-5 mm, and the coating layer is composed of, by weight, 70-80 parts of red mud, 10-15 parts of fly ash and 5-20 parts of cement. The preparation method comprises the following steps: crushing and screening waste toughened glass, preparing red-mud-based gel slurry, coating the surfaces of glass particles with the red-mud-based gel slurry in a dip-coating or roll-coating manner, and carrying out standard curing for 28 days to obtain the coupling coarse aggregate. The aggregate can replace natural coarse aggregate to prepare large-dosage red mud-based concrete, wherein a cementing material comprises red mud, mineral powder, ardealite and cement. According to the invention, the alkali-silicon reaction is effectively blocked through the core-shell structure, and the aggregate-matrix interface performance is improved, so that the concrete has high compressive strength, excellent durability and low expansion rate, meanwhile, the synergistic resource utilization of bulk solid wastes of the red mud and the waste toughened glass is realized, and the concrete has remarkable environmental protection and economic benefits.

The application discloses an early-strength heat-insulation type light plastering gypsum mortar and a preparation method thereof. The early-strength heat-insulation type light plastering gypsum mortar comprises the following raw materials in parts by weight: 550-800 parts of gypsum powder, 100-300 parts of heavy calcium, 100-300 parts of light aggregate, 50-100 parts of inorganic retarder, 1-5 parts of early-strength water reducing agent, 1-5 parts of reinforcing agent, 1-4 parts of cellulose ether, 5-15 parts of redispersible latex powder and 400-450 parts of water. The early-strength water reducing agent is prepared by reacting high-purity gypsum and polycarboxylic acid water reducing agent solution, and high-activity functional groups in the polycarboxylic acid water reducing agent are inlaid on the surface of fibrous calcium sulfate whiskers. The light aggregate is prepared from autoclaved aerated concrete. The inorganic expanding agent is used to adjust the setting time, the early-strength water reducing agent and the reinforcing agent are used to improve the compressive strength and bonding strength of the gypsum mortar, and the autoclaved aerated concrete is used to replace traditional light aggregates such as vitrified small balls and expanded vermiculite, so that the heat preservation performance of the gypsum mortar is improved.

This invention discloses an eco-friendly concrete cementitious material and eco-friendly concrete, belonging to the field of building materials technology. This invention provides an eco-friendly concrete cementitious material that significantly improves the mechanical properties of eco-friendly concrete through the scientific compounding and synergistic effect of its components. Sulfoaluminate cement, as the main cementitious material, provides early strength and micro-expansion characteristics, effectively compensating for shrinkage. Mineral powder and silica fume, as active mineral admixtures, not only exert a micro-aggregate filling effect, densifying the microstructure of the hardened body, but also consume Ca(OH)2 in the system through a secondary hydration reaction, initially reducing the risk of efflorescence. Gypsum not only regulates the setting time but also promotes the formation of ettringite, improving the strength of the concrete matrix. By adding modified mesoporous silica, the alkali-sealing performance and mechanical properties of eco-friendly concrete can be significantly improved.