1594 results about "Bentonitic clay" patented technology

The invention discloses a preparation method and application of interpenetrating network gel based on bentonite minerals, and belongs to the technical field of collapsible loess improvement. According to the prepared bentonite mineral interpenetrating network gel (BT-PAA / PEG / PVA), bentonite serves as a crosslinking node and cooperates with a PAA ion network, a PEG flexible chain segment and a PVA rigid hydroxyl network to construct a triple interpenetrating structure, high water absorption, compression resistance, salt resistance and long-term stability are achieved, the gel is applied to collapsible loess improvement, and the collapsible loess improvement effect is good. And gel particles and soil particles are combined to form an anchoring effect, so that the permeability of a soil body is reduced and the soil body is prevented from collapsing.

The invention provides a high-performance shield intelligent synchronous grouting control system based on solid waste residue soil resource utilization, a grouting material and a preparation method, and relates to the technical field of shield engineering, the high-performance shield intelligent synchronous grouting control system comprises a parameter obtaining module used for obtaining key parameters, the actual grouting amount and the actual grouting pressure; the error calculation module is used for calculating a grouting amount error and a grouting pressure error; the error fuzzy classification module is used for fuzzy grade classification; the membership calculation module is used for calculating the membership of the grouting amount error and the grouting pressure error to each fuzzy grade category; the fuzzy rule base construction module is used for establishing an initial fuzzy rule base and adjusting and optimizing the initial fuzzy rule base to obtain a final fuzzy rule base; and a grouting process adjusting module. The solid waste muck is used for replacing bentonite and part of sand aggregate, so that the material cost is remarkably reduced, outward transportation and landfill of waste are reduced, and the burden on the environment is reduced.

The invention relates to the field of civil engineering waterproof materials, in particular to a nano bentonite-polymer composite material with high salt tolerance and a preparation method thereof, and the nano bentonite-polymer composite material is especially suitable for a sodium-based bentonite waterproof blanket in a saline soil area or a marine environment, and the preparation method comprises the following steps: (1) preparing nano bentonite lamellar colloidal dispersion liquid; (2) introducing and mixing an electrostatic screening agent and a polymerizable monomer; (3) carrying out in-situ free radical polymerization reaction; and (4) post-treatment and finished product preparation. By constructing a three-dimensional interpenetrating hierarchical structure composed of a covalent grafted polymer network, a physically anchored electrostatic screening agent and a stripped bentonite nanosheet layer, effective protection of a bentonite core anti-seepage unit is realized, so that the adaptability and long-term stability of the material under a complex water quality condition are remarkably improved.

The invention provides a dump leaching method for improving the leaching rate of gold ore, and belongs to the technical field of mineral processing. The method comprises the following steps: firstly, separating minerals into oversize products and undersize products; mixing sodium carboxymethyl cellulose, bentonite and ferrous sulfate to obtain a mixture, and granulating the undersize product by using the mixture as a binder; and mixing the undersize product particles with the oversize product, and carrying out cyanide-free dump leaching. According to the method, through graded granulation and heap building, the problem that heap building permeability is poor due to the fact that the gold ore contains many clay minerals is solved. In the granulation stage, ferrous hydroxide colloid generated by hydrolysis of ferrous sulfate in the binder can assist ore particle agglomeration, and particle stability is enhanced; during subsequent cyanide-free dump leaching, ferrous sulfate can be used as an auxiliary reducing agent and a catalyst in a thiourea gold leaching system to promote oxidation and dissolution of gold; meanwhile, ferrous ions can adjust the oxidation-reduction potential of a system, so that the thiourea gold leaching reaction is in a more favorable potential interval, the oxidation efficiency of thiourea is improved, invalid decomposition of thiourea is reduced, and therefore the use amount of thiourea and the use amount of agents are reduced.

The invention relates to a preparation method and application of high-temperature-resistant organic modified bentonite. According to the method, three organic modifiers of long-chain quaternary ammonium salt, amide and a silane coupling agent are compounded to modify bentonite, and the problem that a single modifier is easy to decompose at high temperature is solved through the synergistic effect of physical intercalation, chemical crosslinking and interface bonding; and secondly, a three-dimensional stable structure is constructed by adding nano silicon dioxide and a composite modifier, so that the high temperature resistance and dispersion stability of the modified bentonite are further enhanced. According to the invention, the requirements of deep well and ultra-deep well drilling fluids on the temperature resistance and rheological property of the treating agent can be met, and the ultra-deep well drilling fluid which can tolerate the high temperature of 250-300 DEG C, and is low in filter loss and good in dispersion stability can be obtained.

The invention relates to the technical field of tunnel engineering building materials, in particular to a double-slurry synchronous grouting material based on shield silty-fine sand and a preparation method of the double-slurry synchronous grouting material based on shield silty-fine sand. The liquid A is prepared from, by weight, 20%-30% of cement, 30%-50% of shield silty-fine sand, 5%-10% of bentonite, 5%-15% of mineral admixture, 0.1%-0.5% of stabilizer and 20%-30% of water, and the stabilizer is a water-soluble high-molecular polymer; the solution B is a water glass solution, and the volume ratio of the solution A to the solution B is (10-15): 1; the double-slurry synchronous grouting material further comprises a retarder and a coagulant, the retarder is citric acid, and the coagulant is a nano Ca (OH) 2 crystal nucleus. Bidirectional and gradient regulation and control of the gelation time between 5s and 100s can be realized through the coagulant and the retarder, and diversified requirements of different geological conditions and construction progress on slurry operation time are met.

The invention provides a biochar composite porous material for heavy metal contaminated soil remediation and a preparation method and application of the biochar composite porous material. The preparation method comprises the steps that biomass raw materials are subjected to high-temperature pyrolysis carbonization and then smashed, ground and sieved, and biochar powder is obtained; dispersing in a phosphoric acid solution to obtain a biochar solution, and filtering, washing and drying after a hydrothermal activation reaction to obtain activated biochar; dispersing in a chitosan solution, carrying out ultrasonic oscillation, filtering, washing and drying to obtain modified charcoal; mixing sodium bentonite, attapulgite and deionized water, uniformly mixing the modified charcoal, the functional slurry and a sodium carboxymethyl cellulose solution to obtain composite slurry, performing compression molding to obtain a green body, and then drying and calcining the green body. The biochar composite porous material prepared by the invention can simultaneously play multiple roles of physical adsorption, chemical chelation, ion exchange and the like in a heavy metal contaminated soil treatment process, so that efficient fixation of various heavy metal ions is realized.

The invention relates to the technical field of soil remediation, in particular to a soil ecological remediation agent based on coal gangue-fly ash and a preparation method of the soil ecological remediation agent. The soil ecological restoration agent comprises the following components in parts by weight: 40-50 parts of coal gangue-fly ash mixed powder, 6-12 parts of a microbial agent, 15-20 parts of humic acid, 6-12 parts of sodium polyacrylate, 8-12 parts of straw carbon, 20-25 parts of bentonite and 4-6 parts of aluminum sulfate. The soil ecological restoration agent can supplement trace elements into soil, meanwhile, the coal gangue-fly ash can adsorb heavy metals in the soil so as to fix the heavy metals, the microbial agent can be loaded on the surface of the coal gangue-fly ash, the heavy metals adsorbed on the coal gangue-fly ash are precipitated through the microbial agent, and the heavy metals adsorbed on the coal gangue-fly ash can be fixed. The concentration of heavy metal ions in the soil is reduced.

The invention relates to the technical field, in particular to an ultralight foamed ceramic hollow sphere prepared from iron lepidolite tailings and a preparation method and application of the ultralight foamed ceramic hollow sphere. The foamed ceramic hollow sphere is prepared from the following raw materials: iron lepidolite tailings, silicon carbide, bentonite, sodium carbonate and potassium carbonate; in percentage by mass, the content of the iron lepidolite tailings is 90 to 96.4 percent; the content of the silicon carbide is 0.1-1%; the iron lepidolite tailings are prepared from the following components in percentage by mass: 77 to 80 percent of SiO2, 10 to 13 percent of Al2O3, 1.3 to 1.6 percent of Fe2O3 and 0.1 to 0.17 percent of Li2O. The ultralight foamed ceramic hollow sphere is prepared by using the iron lepidolite tailings, the silicon carbide, the bentonite, the sodium carbonate and the potassium carbonate as raw materials, can meet various market requirements of heat preservation, heat insulation, sound insulation, noise reduction and the like, and brings remarkable economic benefits and social benefits.

The invention discloses an earth surface directional drilling high-pressure deep hole grouting construction method based on steel sleeve hole fixing. The earth surface directional drilling high-pressure deep hole grouting construction method comprises the following steps that firstly, a directional drilling machine is used for vertically drilling a grouting hole downwards; secondly, a plurality of steel floral tubes are sequentially put down in the three-opening first branch grouting hole; thirdly, cement-bentonite-based sleeve shell materials are continuously injected into the first section of the steel floral tube to the inner bottom of a first branch grouting hole of the three-opening hole, and an annular space between the first branch grouting hole of the three-opening hole and the steel floral tube string is filled with the cement-bentonite-based sleeve shell materials; fourthly, a packer is lowered to the bottom of the three-opening first branch grouting hole; a packing section is formed in front of the packer; and fifthly, cement grout is injected into the grouting pipe, grouting is conducted on the packing section, the finally-set cement-bentonite-based casing material is split and damaged under the effect of grouting pressure, and the grouting grout is injected into the stratum to be reinforced through the grout channel. According to the method, the hole collapse phenomenon when the grouting hole penetrates through the unfavorable geological section can be prevented, the grouting stopping effect of the packer is guaranteed, and retreating type segmented grouting construction is guaranteed.

The invention discloses base paper for aluminum spraying and a preparation method thereof, and relates to the technical field of base paper. The preparation method comprises the following steps: pulping softwood pulp, then adding deionized water to dilute the softwood pulp until the mass concentration is 0.8%-1%, then adding modified gel particles, modified bentonite and a PAE wet strength agent, adjusting the pH value to 6.5-7.5, stirring for 40-60 minutes, and then adding deionized water to dilute the softwood pulp until the mass concentration is 0.5%-0.7% to obtain mixed paper pulp; and then making the mixed paper pulp into paper sheets, squeezing, drying, coating the surface layer coating on the surface of base material paper, and drying with hot air to obtain the body paper for aluminum spraying. According to the invention, the modified gel particles and the modified bentonite are added, so that the mildew-proof and moisture-proof capabilities of the base paper for aluminum spraying are effectively improved; the introduction of the surface coating further improves the mildew-proof and moisture-proof capabilities. Therefore, the method has a wider application prospect.

The invention relates to a high-performance environment-friendly synchronous grouting material and a preparation method thereof. The raw materials of the synchronous grouting material include, by weight, 10-15 parts of cement, 15-20 parts of slag, 20-30 parts of steel slag, 300-320 parts of mud-containing powdered fine sand, 0.075-0.1 parts of iron sulfide, 0.05-0.12 parts of graphene oxide, 0.03-0.09 parts of N,N-diisopropylformamide and 45-50 parts of water. The invention uses the mud-containing powdered fine sand as a raw material to replace bentonite and fine sand in the original synchronous grouting material, and mixes cement, slag, iron sulfide, graphene oxide and other materials. The components act synergistically, so that the prepared synchronous grouting material has excellent impermeability and compressive strength, short setting time, low carbon and environmental protection, and high economic and social benefits.

The invention discloses a composite system geopolymer grouting material and a preparation method thereof. The composite system geopolymer grouting material comprises the following raw materials in percentage by mass: 50-70% of coal gangue, 10-30% of fly ash and 10-30% of cement. Functional additives: 5%-20% of desulfurized gypsum and 5%-15% of bentonite; the composite exciting agent is formed by compounding carbide slag and sodium silicate according to the mass ratio of 1: 1-1: 2. The geopolymer is excellent in mechanical property, meets engineering requirements, is remarkable in environmental protection benefit, conforms to double-carbon target low-carbon process innovation: a calcination-free process: traditional high-temperature calcination is abandoned (the temperature needs to be 550-900 DEG C), carbon emission is reduced by more than 30% (compared with a contrast, the carbon emission of a traditional process is increased by 35%), and the geopolymer conforms to the green positioning of low energy consumption and low three wastes of geopolymers. The cost advantage is prominent, the economic value is remarkable, the raw material cost is reduced, specifically, the coal gangue (low-cost solid waste) is used for replacing 30%-50% of cement, and the comprehensive raw material cost is reduced by 40% (compared with a traditional cement-based grouting material).

The invention relates to the technical field of architectural ceramics, in particular to a gangue-doped ceramic tile and a preparation method thereof.The gangue-doped ceramic tile comprises a green body layer, a ground coat layer, a decorative layer and a glazed layer which are sequentially arranged from bottom to top; the green body layer is prepared from the following raw materials in percentage by mass: 6 to 12 percent of bentonite, 1 to 5 percent of Qingshan soil, 3 to 6 percent of polishing mud, 6 to 12 percent of waste brick powder, 4 to 8 percent of green gangue, 5 to 15 percent of chinastone, 20 to 30 percent of feldspar, 1 to 3 percent of recycled blank material, 2 to 5 percent of snail mountain soil, 8 to 15 percent of sandstone, 3 to 6 percent of washed white mud, 5 to 15 percent of coal gangue and 2 to 5 percent of grey gangue; the chemical components of the polishing mud, the waste brick powder, the recycled blank material and the coal gangue respectively comprise SiO2, Al2O3, Fe2O3, TiO2, CaO, MgO, K2O and Na2O. According to the gangue-doped ceramic tile and the preparation method thereof, the raw materials of the green body layer are improved, so that the firing temperature is reduced, the firing period is shortened, low-temperature fast firing is realized, and meanwhile, the production cost is low, the antifouling property is excellent, and the strength is high.

The invention discloses an anti-seepage, water-locking and fertilizer-retaining sandy land soil conditioner, and relates to the technical field of sandy land soil improvement, the anti-seepage, water-locking and fertilizer-retaining sandy land soil conditioner comprises the following raw materials by mass: 50-60% of decomposed cow dung; 15 to 20% of modified straw fiber; 12 to 15% of a sodium carboxymethyl cellulose solution with a concentration of 0.1%; 3 to 5% of bentonite; 1-2% of a microbial agent; 0-15% of a slow-release compound fertilizer; 0.5-1% of polyglutamic acid; and 0.5-1% of a stone-chitosan coating agent. The invention also discloses a preparation method of the anti-seepage, water-locking and fertilizer-retaining sand soil conditioner. The preparation method comprises the following steps: step 1, straw modification; step 2, cow dung decomposition; step 3, preparing a colloidal solution; step 4, mixing and granulating; step 5, coating treatment; and step 6, post-processing. By adopting agricultural wastes as main raw materials, resource utilization of the wastes is realized, and a biodegradable material is introduced to replace synthetic resin, so that the degradation period is shortened to 18-24 months.

The invention discloses preparation of a bentonite-based composite adsorption material and application of the bentonite-based composite adsorption material in sewage treatment. The preparation comprises the following steps: preparing modified bentonite; preparing modified biomass charcoal; mixing the modified bentonite and the modified biomass charcoal, and performing ball milling to obtain a mixture A; performing pressure-maintaining pressing on the mixture A by using a tablet press, and grinding to obtain a mixture B; the mixture B is subjected to heat treatment in the nitrogen atmosphere, naturally cooled to the room temperature and ground, the bentonite-based composite adsorption material is obtained, and the bentonite-based composite adsorption material is used for adsorbing heavy metal ions and organic pollutants in sewage. The bentonite-based composite adsorption material prepared by the invention has excellent adsorption capacity on heavy metal ions and organic pollutants in sewage.

The present invention discloses a high-precision foundation pit retaining wall leakage potential measurement system and method. An electrode matrix, an electric field establishment module, a reference electrode, a multi-channel electrical signal parallel measurement device and a data processing terminal are respectively arranged in the foundation pit. The outer side of the non-polarized electrode of the electrode matrix is ​​filled with bentonite slurry. The bentonite slurry can infiltrate the contact part between the non-polarized electrode and the foundation pit soil to change the properties of the soil, thereby controlling the contact potential between the electrode matrix and the soil and reducing the measurement error. At the same time, the non-polarized electrode and the reference electrode of the electrode matrix are respectively provided with an ion concentration meter and a temperature sensor. The data processing terminal can correct the potential difference according to the electrode temperature and ion concentration of the non-polarized electrode and the reference electrode temperature and reference ion concentration of the reference electrode to calibrate the electrode extreme difference caused by temperature and ion concentration, thereby obtaining the true potential difference of the foundation pit, thereby effectively improving the measurement accuracy and improving the accuracy and reliability of the foundation pit leakage detection results.

The invention discloses a preparation process and application of a modified anti-segregation admixture for machine-made sand, and relates to the technical field of polymer modified materials. Modified polyoxyethylene ether and vinyltrimethoxysilane are adopted to construct a steric hindrance effect, styrene-acrylate emulsion is introduced to form an interpenetrating network structure, and nano silicon dioxide and bentonite are cooperated to construct a multi-scale enhancement system. Silane coupling agent hydrolysis and nano grafting reaction are realized through gradient heating, and the particle size distribution D90 of the emulsion is less than or equal to 5 microns by combining an ultrasonic-mechanical synergistic emulsification process. A three-dimensional network is formed by the composite thickening agent and anhydrous sodium sulfate, and after in-situ curing at 25 DEG C with RH greater than or equal to 80%, 0.1-0.5% of the additive is added, so that the slump retention value of the machine-made sand concrete is greater than 315mm (1h), the pressure bleeding rate is less than or equal to 9.7%, the 28d compressive strength is improved by 24.5-72.6 MPa, and the segregation resistance coefficient is reduced to 0.08-0.11. The technology breaks through the limitation of insufficient adaptability of traditional admixtures to machine-made sand, and is particularly suitable for long-distance pumping construction of high-stone-powder-content machine-made sand concrete.

The invention relates to the technical field of building materials, in particular to a cementing material for a fabricated wall prepared from multi-element solid waste and a preparation method of the cementing material. The preparation method comprises the following steps: 25-55 parts of fly ash, 25-65 parts of blast furnace slag, 8-10 parts of lime, 1-5 parts of desulfurized gypsum, 3-6 parts of a first mixture, 2-5 parts of a second mixture and 5-8 parts of an alkali activator; the mass ratio of the metakaolin to the bentonite to the superfine calcium carbonate in the first mixture is 3: 2: 1; the mass ratio of the vermiculite to the expanded perlite to the glass beads in the second mixture is 2: 2: 1. Through the synergistic excitation effect of Ca < 2 + > and Na < + > and the addition of the first mixture and the second mixture, the cementing material forms a more stable microstructure. A hydration product SEM figure shows that C-S-H and C (N)-A-S-H gel are symbiotic to form a three-dimensional network, pores are filled with needle-like ettringite crystals, and in combination with the brucite phase anchoring effect, the mechanical properties, such as strength and durability, of the material are remarkably improved.

The invention relates to the technical field of bentonite anti-seepage materials, and particularly discloses a pre-hydrated bentonite anti-seepage material and a preparation process thereof. The modified bentonite is prepared by mixing the following raw materials in parts by mass: 80-90 parts of calcium bentonite, 10-12 parts of a binder, 5-8 parts of an organic composite component and 3-5 parts of ethylene carbonate, the preparation method comprises the following steps: taking calcium bentonite, crushing, sieving, adding water for dispersing, adjusting the pH value, adding ethylene carbonate, heating and stirring, adding the organic composite component, continuously treating, filtering, taking a solid part, adding a binder, mixing, laminating, carrying out mold pressing treatment, and cooling, thereby obtaining the product. Wherein the organic composite component is obtained by amino-terminated modification of acylated polyethylene glycol. The water absorption rate of the pre-hydrated bentonite anti-seepage material prepared by the preparation process is greater than or equal to 5.2, the water retention rate is greater than or equal to 63.7%, and the elution risk of intercalator micromolecules can be greatly reduced.

The invention provides a mixed type shield synchronous grouting material and a grouting process, and relates to the technical field of building materials, the grouting material is composed of fast hydration Portland cement, activated aluminosilicate minerals, nanometer silicon powder, bentonite, a reversible thixotropic polymer, a delayed hydration agent, coated calcium aluminate fast setting powder and a coated silicate gel precursor. The early-stage reaction is inhibited by delaying hydration, and a controllable solidification sequence of slurry from a flowable stage, a rearrangement structure stage to a rapid solidification stage is realized by breaking a membrane under the action of temperature or pressure gradient. In the process, by monitoring the conductivity, the concentration of Ca < 2 + > / Mg < 2 + > and the temperature in real time, the adding amount of an additive and grouting parameters are automatically adjusted, so that the stable diffusivity of the material is kept and the curing speed is accelerated under different stratum conditions. The solidified body forms a C-S-H, C-A-S-H and N-A-S-H gel interpenetrating network, the permeability coefficient is low, the water dispersion resistance is high, and the shield grouting quality and the tunnel structure safety can be remarkably improved.

The invention provides an environment-friendly sludge curing stabilizer and a preparation method thereof, and the environment-friendly sludge curing stabilizer comprises the following components in parts by weight: 10-25 parts of modified aggregate; 60-70 parts of a cementing agent; 5-30 parts of a water absorbent; the modified aggregate is formed by mixing silica fume and steel slag particles, the cementing agent is composed of slag, fly ash and bentonite, and the water absorbing material is composed of semi-hydrated phosphogypsum, quick lime and red mud; the curing stabilizer is composed of modified aggregate, a cementing agent and a water absorbing material. The environment-friendly sludge curing stabilizer prepared by the invention is used for treating sludge, the water content in 3d is reduced by 80% or more, and the compressive strength exceeds 3MPa; the water content within 14 days is reduced by 90% or above, the compressive strength can reach 6 MPa or above, the compressive strength exceeds the strength grade requirement of a roadbed material, meanwhile, the leaching concentration of heavy metal in the sludge is reduced by 95% or above, the sludge can be used as a building material for resource utilization, and the method has important significance on resource utilization, land occupation reduction and environmental pollution reduction. Wide popularization and application prospects are realized.

The invention discloses an efficient lithium slag solidification and stabilization agent and a preparation method thereof. The efficient lithium slag solidification and stabilization agent comprises the following raw materials in parts by weight: 20-50 parts of lithium slag, 5-10 parts of carbide slag, 8-12 parts of nano silicate, 6-12 parts of slag powder, 3-6 parts of hydroxyapatite, 2-5 parts of bentonite, 4-8 parts of fly ash and 1-3 parts of aluminum sulfate. The method disclosed by the invention has the advantage of environmental protection, and solves the problems that when the existing lithium slag is recycled, the lithium slag is inconvenient to solidify and stabilize, the lithium slag often contains heavy metals, and if the lithium slag is not fixed in a lattice structure through solidification and stabilization technologies, the heavy metals can be leached along with rainwater to enter soil and water, and long-term ecological pollution is caused.

The invention discloses a flue gas water-based three-phase foam system and a profile control method, the flue gas water-based three-phase foam system comprises dispersed-phase gas, suspended-phase solid particles and continuous-phase liquid, the liquid comprises the following components in percentage by weight: 0.5-2.0 wt% of a foaming agent, 0.05-0.5 wt% of a stabilizer, 0.05-0.2 wt% of a thickening agent, 0.1-0.8 wt% of a suspending agent, 0.3-1.0 wt% of inorganic salt and the balance of liquid preparation water; the gas comprises flue gas or mixed gas of one or at least two of nitrogen, natural gas, carbon dioxide, air and flue gas and the flue gas; the solid particles comprise one or a mixture of at least two of silicon dioxide particles, montmorillonite particles, bentonite particles, kaolin particles and fly ash particles, and the particle sizes of the solid particles are from nanometer to micrometer. According to the method, the flue gas discharged by the steam-injection boiler is captured and treated and then is injected into the stratum together with the water-based three-phase foam system and the steam segmented plug according to a certain proportion to assist in steam recovery of the thickened oil, so that the recovery rate of the thickened oil can be increased, the emission of greenhouse gases can be reduced, the capture, storage and utilization of CO2 can be realized, and the environmental protection situation requirements of carbon peak reaching and green development are met.

The invention discloses a biochar composite material and a preparation method and application thereof.The composite material is formed by compounding reed straw biochar and bentonite, the reed straw biochar is of a fiber tube bundle structure, the interior of the reed straw biochar is of a circular pore channel structure, and the bentonite is loaded on the surface of the reed straw biochar and is of an irregular gap structure; the preparation method comprises the following steps: (1) preparing the reed straw biochar; (2) adding bentonite into a solvent, fully dispersing to form a suspension, then adding the reed straw charcoal, and mixing to form a stable mixed solution; and (3) removing the solvent from the mixed solution prepared in the step (2), and then drying to obtain the reed straw biochar-bentonite composite material. According to the biochar composite material disclosed by the invention, by virtue of the synergistic effect of a biochar porous structure and a bentonite layered structure, the persulfate activation efficiency is greatly improved.

The invention relates to the technical field of waste slurry treatment, in particular to a geopolymer curing performance enhancing and modifying method for high-bentonite-content slurry. Comprising a method for adding a curing and enhancing modification auxiliary agent, and the method for adding the curing and enhancing modification auxiliary agent comprises the following steps: doping the curing and enhancing modification auxiliary agent into high-bentonite-content slurry, uniformly stirring, and standing for curing; wherein the curing enhanced modification additive comprises the following raw material components in percentage by mass: 70-80% of calcium chloride, 10-20% of sodium chloride, 10-15% of nano silicon dioxide, 5-10% of a dispersing agent and 0.5-3% of an EDTA (Ethylene Diamine Tetraacetic Acid)-polymer derivative. The additive is added, so that the negative influence of bentonite in the waste slurry on the reaction of the geopolymer is effectively eliminated, the reaction conditions of the geopolymer in a complex slurry environment are optimized, and the utilization rate and the success rate of the slurry are improved.

The invention discloses a novel dust falling material with strong wettability and high strength and toughness and a preparation method thereof. The novel dust falling material is prepared from the following raw materials in parts by weight: 1-3 parts of pectin, 10-35 parts of acrylamide, 1-2.5 parts of an initiator, 0.06-0.1 part of sodium periodate, 20-60 parts of bentonite, 8-12 parts of a wetting agent and 1000-3000 parts of water. According to the dust suppressant, the remarkable advantages of performance breakthrough, environment friendliness and economic optimization are achieved through the synergistic effect of multiple components, it is measured through experiments that the dust suppressant can form a solidified shell layer with toughness and strength on the surface of a coal sample, and the dust suppressant has the unique double-water-locking mechanism that polymer carboxyl chemical bonding water molecules and bound water physically adsorbed between bentonite layers are combined, so that the dust suppressant has the good dust suppressant effect on the surface of the coal sample. A good water loss rate can be maintained in a high-temperature drought environment, and the dust suppression efficiency can be improved due to the rapid film forming characteristic. A solidified layer with a complete structure is formed after drying, pulverized coal is effectively prevented from loosening, the inhibition rates of PM2.5 and PM10 both exceed 95%, and the efficient and lasting dust suppression effect is achieved.

The invention relates to the technical field of sewage treatment, and particularly discloses a high-suspended-matter sewage treatment agent for an oil extraction plant. The invention discloses a high-suspended-matter sewage treatment agent for an oil extraction plant. The high-suspended-matter sewage treatment agent comprises 40-60 parts of modified bentonite; 5-15 parts of ferrous sulfate; 5-15 parts of aluminum ferric sulfate; 1 to 5 parts of ethylenediamine tetraacetic acid; 10 to 20 parts of an active biochar material; 3 to 8 parts of chitosan; 5 to 10 parts of a flocculating agent; the modified bentonite is obtained by modifying bentonite through laccase and nano zero-valent iron; the active biochar material is obtained by taking waste biomass as a raw material and carrying out semi-carbonization and activation treatment. The sewage treatment agent disclosed by the invention can be used for purifying high-suspended-matter sewage generated by oil extraction plants and oil wells, has high removal efficiency on suspended matters, and can effectively remove organic humus, so that the content of the suspended matters in the treated sewage reaches the standard.

The invention relates to the technical field of concrete, and particularly discloses low-temperature-resistant self-repairing waterproof concrete for water conservancy and a preparation method of the low-temperature-resistant self-repairing waterproof concrete. The water conservancy low-temperature-resistant self-repairing waterproof concrete is specifically prepared from the following components in parts by weight: 70 to 80 parts of cement, 10 to 20 parts of fly ash, 8 to 12 parts of silica fume, 2.5 to 3.5 parts of a reinforcing material, 0.2 to 0.4 part of a crystallization inducer, 1.5 to 2.5 parts of a repairing agent and 20 to 40 parts of water, the reinforcing material is formed by mixing nano silica sol, bentonite, quartz sand and triethanolamine; the crystallization inducer is formed by mixing sodium silicate and aluminum hypophosphite; the repairing agent is obtained by loading calcium ions on an amino silane modified zeolite material and then mixing with a bacillus pasteurii bacterial solution. By utilizing the technical scheme provided by the invention, the prepared concrete has excellent mechanical properties, water resistance, impermeability, freezing resistance, crack resistance and good durability.

The invention discloses a self-repairing synchronous grouting material and a preparation method thereof, and belongs to the technical field of grouting materials. The self-repairing synchronous grouting material comprises a cement base material, a microbial capsule and chitosan calcium salt, the concrete comprises the following raw materials in parts by mass: 7-12 parts of Portland cement, 20-28 parts of fly ash, 40-55 parts of quartz sand, 20-30 parts of water, 2-7 parts of bentonite, 1-5 parts of microbial capsules and 1-5 parts of chitosan calcium salt. The self-repairing synchronous grouting material disclosed by the invention is combined with a microorganism self-repairing technology, and mineral substances such as calcium carbonate and the like can be generated through metabolic activity of microorganisms when the material has cracks, so that the cracks are automatically filled, and expansion of the cracks on the surface of a concrete material can be effectively prevented; the grouting material can continuously repair microcracks caused by environmental changes or construction stress in the long-term use process, and the integrity and stability of the structure are kept.