17 results about "Microfine cement" patented technology

The invention provides a grouting-curing-intercepting cross-cut rapid coal uncovering method, and relates to the technical field of cross-cut coal uncovering. The method comprises the steps that drilling topological mapping is conducted on a target area, a connected gas interception and extraction network is constructed, and gas attenuation characteristics are extracted to determine a grouting permeation resistance coefficient; then, a high-pressure grouting dynamic pressurization gradient sequence is formulated, and an in-situ test execution unit is configured in a negative pressure guide reserved area; establishing a process response state diagram containing bag strength, sieve tube smoothness and crack filling test nodes, generating an optimal grouting path by adopting closed-loop feedback logic, and collecting a multiphase flow grouting response data set; and finally, generating a complete solidification curtain map by using the data set, executing a solidification-gas interception collaborative verification decision, and outputting a safe coal uncovering instruction. By means of digital closed-loop control, accurate solidification of superfine cement on coal seam microcracks and efficient interception and extraction of gas are achieved, and the safety and operation efficiency of cross-cut coal uncovering are remarkably improved.

The invention provides a low-water-solid-ratio superfine cement grouting material and a preparation method and application thereof, and belongs to the field of grouting materials.The low-water-solid-ratio superfine cement grouting material is prepared from, by weight, 30-40 parts of Q-phase cement clinker, 50-60 parts of sulphoaluminate cement clinker, 10 parts of superfine quartz powder, 0.4-0.8 part of grinding aid and the balance water; wherein the content of the water meets the condition that the water-solid ratio is 0.3-0.5; the main mineral phase in the Q-phase cement clinker is Q-phase mineral and C2S. The micro-crack grouting material is prepared without other additional auxiliaries, the good rheological property, stability and micro-expansion performance are achieved under the low water-solid ratio condition, the process is simple and easy to implement, and reliable technical support is provided for solving the micro-crack grouting problem.

The invention relates to the technical field of pavement coating materials, and particularly discloses a road fog seal material and a preparation method thereof.The road fog seal material is prepared from, by weight, 200-300 parts of modified emulsified asphalt, 30-50 parts of asphalt regenerant, 5-10 parts of penetrant, 10-20 parts of tackifier, 5-10 parts of water, 30-70 parts of sand, 10-30 parts of superfine cement and 15-35 parts of diffusant; the dispersing agent is a terpene unsaturated compound; the modified emulsified asphalt is emulsified asphalt jointly modified by nano glass fibers and polyurethane resin; by adjusting the types and mixing amounts of the raw materials, the prepared fog sealing layer for the road is good in wear resistance, the improvement rate of the water permeability coefficient reaches 100%, the adhesion is excellent, the water damage resistance, wear resistance and skid resistance of the constructed road surface are greatly improved, and the durability of the road surface is improved.

The invention relates to a diene gel chemical blocking and channeling sealing agent. The problems that the plugging effect is poor and well cementation accidents are easily caused after an existing superfine cement system is solidified in large pore channel or crack plugging are mainly solved. The adhesive is characterized by comprising the following components in parts by mass: 8-10 parts of acrylamide; 1 to 3 parts of N, N-dimethylacrylamide; 5-6 parts of superfine silicate; 0.1 to 0.5 part of a dissolution promoter; 0.5 to 2.0 parts of a cross-linking agent; 0.1 to 0.3 part of an initiator; 0.1 to 0.2 part of a reinforcing agent and 78 to 85.2 parts of water; the preparation method comprises the following steps: sequentially adding the acrylamide, the N, N-dimethylacrylamide and the dissolution promoter into quantitative clear water according to the formula proportion of the agent, stirring, adding the cross-linking agent and the initiator, continuously stirring, adding the superfine silicate and the enhancer, and stirring and dissolving to obtain uniform liquid. The blocking and channeling sealing agent can improve the field working efficiency, the blocking effect is good after solidification, and well cementation accidents are not prone to being caused.

The present application belongs to the technical field of oil field chemistry, and discloses an oil-water well glue joint composite plugging agent system and application thereof. The components of the oil-water well glue joint composite plugging agent system include a fluid loss reducer and a retarder, and an ultra-fine cement and an epoxy resin curing agent composition with a weight ratio of 73-78:15, wherein the epoxy resin curing agent composition is a mixture of an oily epoxy resin and a curing agent thereof. The oil-water well glue joint composite plugging agent system is mixed with the ultra-fine cement in application, has a compressive strength 1.5-2 times higher than that of conventional Portland cement, a cementing strength 3-5 times higher than that of conventional Portland cement, good temperature resistance and fluid loss control performance, and good stability and pumpability. The present application is suitable for layer sealing and leakage plugging of oil-water wells and gas layer sealing in the process of well repair.

The invention relates to the technical field of cement cementing materials, in particular to a high-titanium blast furnace slag-based low-carbon cementing material and a preparation method thereof. The cementing material is prepared from the following raw materials: superfine cement clinker, a ternary composite admixture and an exciting agent, the ternary composite admixture comprises high titanium blast furnace slag, lithium slag, silica fume and a silane modifier. The high-titanium blast furnace slag is ground high-titanium blast furnace slag, and the content of TiO2 is greater than 10%; the lithium slag is waste slag generated in the process of preparing lithium carbonate through a sulfuric acid method and is subjected to mechanical activation modification through ball milling. The activated high-titanium blast furnace slag, the activated modified lithium slag and other solid wastes are adopted to replace part of cement components to prepare the low-carbon cementing material, a new recycling channel is provided for the high-titanium blast furnace slag and the lithium slag, the cost is low, and high economic benefits are achieved. The high-titanium blast furnace slag-based low-carbon cementing material overcomes the problem of low hydration activity when the high-titanium blast furnace slag micro powder is used as an auxiliary cementing material, and has high early and later strength.

Low-cement concrete. The present invention relates to a fresh concrete composition comprising at least: i) a hydraulic binder comprising: - 20% to 40% by weight of Portland clinker relative to the total weight of said binder, - 45% to 75% by weight of filler relative to the total weight of said binder, and - 5% to 15% by weight of ultrafine aggregate relative to the total weight of said binder, being selected from hydraulic admixtures, pozzolanic admixtures, ultrafine cements and mixtures thereof, ii) at least one superplasticizer or plasticizer, iii) water, and iv) aggregates. Figure for the abstract: None

The application provides a plugging agent for treating annular pressure, and a preparation method and application thereof. The plugging agent comprises urease activity liquid and superfine cement plugging paste. The urease activity liquid comprises urease-producing bacteria liquid and / or urease liquid, and is used for inducing the production of carbonate. The superfine cement plugging paste comprises superfine cement base material and calcium-containing early strength agent, and the average particle size D 50 of the superfine cement base material is ≤30 μm. The volume ratio of the urease activity liquid to the superfine cement plugging paste is (2-4):1. The plastic viscosity of the plugging agent is 5-30 mpa·s. The plugging agent provided by the application can effectively plug small-size micro cracks, improve the treatment effect of annular pressure, improve environmental protection, reduce production and construction operation cost, and is conducive to large-scale popularization and application.

The present application relates to the technical field of tunnel construction, and more particularly to a construction method for intelligent management and control of risks of surface and underground in the process of passing through poor geological zones, which uses advanced geological prediction and field survey data to detect positions such as fault fracture zones and weathered alteration deep grooves, and divides shallow buried sections, water-rich pressurized sections and non-pressurized sections, adopts superfine cement-water glass double-liquid grouting, long pipe shed and steel support disposal for different poor geologies, builds a BIM model and calculates the construction disturbance transmission range based on the internal friction angle of the stratum, and accordingly builds a risk coupling mapping diagram with the surface risk source, adopts earth pressure shield construction for balance excavation for the water-rich pressurized section, adopts double-shield TBM construction for the non-pressurized section and switches to drilling and blasting auxiliary mode when joint fracture zones are encountered, and adjusts the excavation speed and grouting parameters through real-time monitoring data combined with the risk coupling mapping diagram, thereby realizing the coordinated and safe management and control of the surface and the underground in complex environments.

The invention provides a steel lining structure for reinforcing and leaking stoppage of an existing structure and a construction method, and relates to the technical field of municipal engineering, the steel lining structure comprises a supporting layer, a filling layer and a contact layer, and the supporting layer is a closed or semi-closed lining structure formed by splicing a plurality of corrugated steel plates; the contact layer is a waterproof coating layer coated on the inner wall of the existing thermal pipe ditch; the filling layer is a superfine cement paste layer poured between the supporting layer and the contact layer. The design of the contact layer can avoid the leaking stoppage failure problems that a traditional concrete lining is poor in bonding and prone to cracking; the supporting layer solves the problems that a traditional integral prefabricated lining is long in construction period and high in cost, and the supporting layer can adapt to old pipe ditches of different sizes by adjusting the splicing mode. The corrugated structure of the corrugated steel plate can resist stress generated by settlement and temperature change of the pipe ditch, the problem that a traditional lining is prone to being damaged is solved, the dual purposes of reinforcing and leaking stoppage are finally achieved, and construction convenience, adaptability and stability are considered.

The application belongs to the technical field of grouting materials, and particularly relates to a polypropylene fiber reinforced ultra-fine cement-based grouting full-length anchoring material and a preparation method thereof. The grouting full-length anchoring material comprises 950-1050 mass parts of reference cement, 2-2.5 mass parts of a water reducing agent, 80-100 mass parts of an expanding agent, 35-65 mass parts of a quick-setting agent and 1-7 mass parts of polypropylene fibers. Compared with the existing cement grouting material, the grouting material has high slurry stability, good fluidity, strong injectability, almost no weeping phenomenon, and as an anchoring agent, the grouting material has higher anchoring strength, enhanced coordinated deformation capacity and better durability in the full-length grouting system.

This application relates to a plugging agent, its preparation method, and its application, belonging to the field of petrochemical production technology. The raw material components of the plugging agent include: ultrafine cement, modified resin, tartaric acid-intercalated hydrotalcite, a fluid loss reducing agent, a dispersant, and a solvent. The diameter of the ultrafine cement is 0.1 μm to 1 μm; wherein, by weight, the ultrafine cement is 47 to 53 parts, the modified resin is 10 to 20 parts, the tartaric acid-intercalated hydrotalcite is 0.2 to 0.4 parts, the fluid loss reducing agent is 1.2 to 1.5 parts, the dispersant is 0.4 to 0.6 parts, and the solvent is 33 to 37 parts. The plugging agent provided by this application overcomes the problems of weak retention, poor bonding, and short shelf life of conventional plugging agents, thereby improving the plugging performance and thus improving the repair performance of casing damage.

The invention discloses a full-space bolting-grouting cooperative control method for roadway surrounding rock gradient damage, belongs to the technical field of mine roadway surrounding rock control, and solves the problems that a traditional bolting-grouting process is low in step-by-step construction efficiency, poor in slurry and gradient fracture adaptability, prone to failure of the end of an anchor rod cable and the like. According to the method, grouting sleeves with different lengths are additionally arranged at the end of the anchor rod cable, so that the anchor rod cable has the grouting capacity, and bolting and grouting collaborative operation is achieved; the method comprises the following steps: firstly, actually measuring gradient distribution of surrounding rock fractures to determine the length of a sleeve, then installing the sleeve with a hole sealing sleeve, applying a pre-tightening force, injecting common cement paste into a shallow part by using a short sleeve, injecting superfine cement paste into a deep part by using a long sleeve, and meanwhile, dynamically monitoring the surrounding rock fractures and triggering supplementary grouting. Gradient precise grouting is achieved, the shear resistance of the anchor rod cable is enhanced, the integrality of surrounding rock is improved, slurry waste is reduced, and the construction efficiency and the reliability and long-term stability of a supporting system are improved.

The application discloses a kind of high-temperature impact resistant high-entropy grouting materials and its preparation method and application, comprising the following components and mass fraction: ultrafine cement 80~100 parts, steel fiber 4~6 parts, high-entropy alloy powder 40~50 parts, water 80~100 parts, water reducing agent 0.1~0.3 parts, reinforcing agent 20~25 parts, waterproof agent 0.08~0.2 parts, retarder 0.04~0.1 parts, air entraining agent 0.08~0.2 parts;The above components are stirred and mixed in order according to mass fraction, to make high-temperature impact resistant high-entropy grouting material;Then high-temperature impact resistant high-entropy grouting material is injected into surrounding rock crack to reinforce surrounding rock;The grouting material of the application still has good high-temperature resistance and impact resistance after being injected into surrounding rock crack and solidified to reinforce, so that surrounding rock can maintain good stability under subsequent high-temperature and impact dynamic load coupling conditions.

The application provides an anti-solid-phase dispersion cement slurry system and a preparation method thereof. The cement slurry system comprises, in parts by weight, 600-700 parts of G-grade oil well cement, 15-25 parts of superfine cement, 0.7-2.1 parts of modified methyl cellulose, 0.5-1.5 parts of anionic polyacrylamide, 0.02-0.05 parts of zwitterionic polyacrylamide, 0.7-3.5 parts of a dispersing agent, 1.4-3.5 parts of gypsum and water. The preparation method of the cement slurry system comprises the following steps: dry mixing the G-grade oil well cement, the superfine cement, the modified methyl cellulose, the dispersing agent and the gypsum; adding the polyacrylamide into water to obtain a polyacrylamide aqueous solution; and adding the dry mixed materials into the polyacrylamide aqueous solution and stirring uniformly to obtain the anti-solid-phase dispersion cement slurry system. The application provides a cement slurry system which can agglomerate solid-phase particles in the cement slurry system and resist solid-phase dispersion and dilution of formation water.

This invention discloses a wear-resistant and impact-resistant high-strength rubber concrete and its preparation method. The wear-resistant and impact-resistant rubber concrete, by weight, comprises the following raw materials: 354 parts cement, 52 parts silica fume, 87 parts ultrafine cement, 87 parts fly ash, 417 parts sand, 1156 parts gravel, 30.2 parts rubber, 46.4 parts quartz sand, 8.7 parts water-reducing agent, and 135.7 parts water. The wear-resistant and impact-resistant rubber concrete of this invention conforms to the closest packing model and incorporates quartz sand, rubber particles, silica fume, fly ash, and ultrafine cement. The compressive strength, modulus of elasticity, flexural strength, splitting tensile strength, and impact and abrasion resistance of this invention are superior to those of ordinary rubber concrete.

The present application relates to the technical field of mine tunnel acid water pollution treatment, and discloses a kind of abandoned pyrite well acid heavy metal drainage plugging process and its structure, and its specific steps include:1) tunnel hydrogeological survey: according to the position of water seepage point and the size of water seepage amount, tunnel is divided into gushing area, water leaching area and dry area;2) division of grouting plugging area and complete surrounding rock impermeable area: divided into grouting plugging area and complete surrounding rock impermeable area;3) configuration of plugging material: configuration of modified acid-resistant ultra-fine cement, bentonite;4) plugging tunnel: by high-pressure grouting equipment, modified acid-resistant ultra-fine cement is injected into grouting plugging area, and bentonite is backfilled to complete surrounding rock impermeable area.The present application sets up specific plugging structure for mine gushing channel through the backfilling of abandoned pyrite well, to a certain extent, reduces the generation amount of acid heavy metal drainage, and realizes the purpose of acid heavy metal drainage reduction of abandoned pyrite well.