40results about How to "Improve anti-shrinkage performance" patented technology

The invention discloses impregnation reinforcement-thermal treatment modifying technology for planted forest timber. The technology comprises the following steps in order: 1) impregnating the timber by adopting impregnation liquid which uses modified urea resin as a main agent of the impregnation liquid; and 2) thermally treating the impregnated timber in vacuum. The timber prepared by the method has high dimensional stability and high strength; the bulking resistance and the corrosion resistance of the timber are improved; the added value of the thermally-treated timber is improved; and the application range of the thermally-treated timber is expanded.

The invention discloses a mechanism sand dry-mixed mortar and a preparation method thereof, belonging to the technical field of building materials. According main points in a technical scheme of the invention, the mechanism sand dry-mixed mortar comprises the following components: cement, tailing sand, natural river sand, fly ash, a water-retaining thickener, redispersible latex powder, metakaolin, shell powder and a polycarboxylic acid water reducer. According to the invention, the tailing sand widely available is used as a main fine aggregate, and the compounding of the natural river sand and mechanism sand can make up for the problems of poor grading characteristics and grain shape defects of the mechanism sand; by strictly controlling the content of stone powder in the tailing sand, the processing properties of drying and grading of the tailing sand are improved; gaps in the dry-mixed mortar are filled in by the metakaolin and shell powder, so the compactness and impermeability ofthe hardened mortar are enhanced; the water-retaining and thickening properties of the dry-mixed mortar is improved through the water-retaining thickener; and the raw materials of the dry-mixed mortarare improved in dispersion uniformity and workability is improved, and the adhesion between the raw materials of the dry-mixed mortar is enhanced.

This invention relates to a fiber reinforced artificial stone tomb box and making method, which contains fiber reinforced artificial stone made box unit with cavity and box cover with lower convex edge engaged with upper edge of box unit. The method contains mixing and agitating raw material into slurry, laying fiber net fabric in mold, putting slurry in mold, by molding, maintenance, stripping, repairing, finishing, spraying surface treating liquid to get products, raw material ratio is 30-60 part of cement, 40-65 part of fine aggregate, 1-4 part fiber filament, 1-8 part of anti-cracking permeability-reducing admixture, 0.2-1 part of superplasticizer, 1-5 part of silicate intensifier, 0-4 part of surface treating liquid, 0-0.5 part antifoaming agent and 0-0.5 part of paint. Said invention has advantages of fine anti-impact ability and impermeability, high strength, fine outline and low cost.

The invention relates to the technical field of wood modification, in particular to a modification technology capable of improving strength and tenacity of wood. The modification technology comprises the following steps: A. preparation of impregnation liquid which is prepared from the following raw materials in parts by weight: 10-30 parts of melamine modified urea resin, 6-10 parts of dextrin, 1-5 parts of a nanometer modifying agent, 1-3 parts of a flexibilizer, 1-5 parts of auxiliaries and 60-100 parts of water, weighing the raw materials according to the weight proportion and uniformly mixing to obtain the impregnation liquid; B. impregnating: performing vacuum-pressure impregnation treatment on the wood, and enabling the wood to adsorb the impregnation liquid; C. drying: drying the impregnated wood; D. thermal treatment: conducting thermal treatment on the dried wood under a vacuum state. The modification technology disclosed by the invention can obviously improve the strength and the tenacity of the wood, is simple in steps, convenient to operate and control, stable in quality, high in production efficiency and capable of realizing large-scale industrial production.

The invention relates to a red mud curing agent for paving a road and a preparation method of the red mud curing agent. The red mud curing agent is made of silicon oxide, aluminum oxide, calcium oxide, industrial byproduct alkali residue, tetrahydrophthalic anhydride and ethylene glycol double trimellitic anhydride ester. According to the preparation method, the active matters, such as silicon oxide, aluminum oxide and calcium oxide, are mixed; the active constituents of the matters are matched with one another, thereby obtaining curing agent and red mud; after being stirred, the curing agent and the red mud are subjected to ion exchange under the catalysis of concentrated material, thereby boosting the coagulation of red mud particles; and meanwhile, the red mud is coagulated and hardened, under the hydration reaction of a gelled material in the curing agent; the red mud has higher working strength within a short period of time; and the exosmose of heavy metal, radioactive elements and the like, is avoided. The red mud curing agent prepared by the preparation method disclosed by the invention is used together with red mud for paving the road. Compared with the prior art, the red mud curing agent has the advantages of high strength, excellent plate property, high durability, excellent water stability, excellent frost and melt resistance, excellent air shrinkage resistance, and the like.

The invention belongs to the technical field of a building material, and provides fast hardening early strength type composite repair mortar. The mortar is prepared from the following ingredients in percentage by weight: 5 to 10 percent of water, 20 to 30 percent of cement, 1 to 5 percent of silicon ash, 1 to 5 percent of fly ash, 50 to 70 percent of quartz sand, 0.4 to 0.5 percent of compound early strength agents, 0.06 to 0.1 percent of water reducing agents, 1 to 5 percent of rubber powder and 0.06 to 0.8 percent of hybrid fiber, wherein the composite early strength agent is prepared from an ingredient A and an ingredient B; the ingredient A is lithium carbonate; the ingredient B is a mixture of triethanolamine and aluminum sulfate; the quartz sand consists of coarse sand, medium sand and fine sand; and the hybrid fiber consists of basalt fiber and polypropylene fiber. The fast hardening early strength type composite repair mortar solves the problems of reduced strength, high dry shrinkage rate and low bonding strength of the repair mortar in the prior art.

The invention relates to a water-resistant fatigue-resistant subgrade grouting material. The water-resistant fatigue-resistant subgrade grouting material is prepared from following materials by weight at a water/binder ratio of 0.28 to 3.0 via mixing: 90 to 95% of a binding material, 0.13 to 0.44% of an alkali excitation ingredient, 4.18 to 9.5% of a water-resistant latex, 0.2 to 0.5% of a water reducing agent, 0.01 to 0.02% of a stabilizing ingredient, and 0.03 to 0.05% of a delayed coagulation ingredient. The raw materials are easily available; a preparation method is simple; performance is excellent; the water-resistant fatigue-resistant subgrade grouting material can be applied for strengthening spraying of new subgrade and grouting strengthening of sedimentation subgrade, and possesses excellent effects on areas suffered from long-term rain wash and large rain capacity.

The invention belongs to the technical field of building materials, and provides rapid hardening early strength type composite repair mortar. The rapid hardening early strength type composite repair mortar comprises, by weight, 5%-10% of water, 20%-30% of cement, 1%-5% of silica fume, 1%-5% of fly ash, 50%-70% of quartz sand, 0.4%-0.5% of composite early strength agents, 0.06%-0.1% of water reducing agents, 1%-5% of gelatin powder and 0.06%-0.8% of hybrid fibers. The composite early strength agents comprise components A and components B, the components A are nanometer calcium carbonate whiskers, the components B are mixtures of triisopropanolamine and aluminum sulfate, the quartz sand comprises coarse sand, medium sand and fine sand, and the hybrid fibers include basalt fibers and polypropylene fibers. The rapid hardening early strength type composite repair mortar has the advantage that the problems of strength decreasing, high dry shrinkage and low bonding strength of repair mortar in the prior art can be solved by the aid of the rapid hardening early strength type composite repair mortar.

The invention relates to the technical field of wood modification, in particular to a wood enhancement and corrosion prevention modification liquid and a preparation method thereof. The wood enhancement and corrosion prevention modification liquid comprises the following raw materials in parts by weight: 10-30 parts of melamine modified urea resin, 4-8 parts of dextrin, 1-5 parts of a nano modifier, 0.5-1.5 parts of a preservative, 1-5 parts of auxiliaries and 60-100 parts of water. According to the wood enhancement and corrosion prevention modification liquid, the intensity and the corrosion resistance of woods can be improved; furthermore, the insect bite, mildewing, water, flame, deformation and cracking prevention performance of the modified woods are greatly improved; the density, the hardness, the anti-bending intensity and the elastic modulus are higher, so that the use performance of the woods can be improved, and the service life of the woods is prolonged. The wood enhancement and corrosion prevention modification liquid has natural properties of heat insulation, temperature adjustment, humidity adjustment and the like, is colorful and bright and is high in physical stripe third dimension; a plate looks transparent and natural.

The invention discloses a method for improving the dry shrinkage resistance of a cement stabilized macadam base material. The method includes the following steps: according to JTG D50-2006 'Specifications for Design of Highway Asphalt Pavement' and JTG E42-2005 'Test Methods of Aggregate for Highway Engineering', designing a cement stabilized macadam base material mixing proportion according to gradation of various grades of aggregates; then according to JTG E51-2009 'Test Methods of Materials Stabilized with Inorganic Binders for Highway Engineering', carrying out compaction test, and determining the optimal water content of the cement stabilized macadam base material at specific cement dosage; and blending magnetized water with the optimal water content, macadam and cement to obtain thecement stabilized macadam base material. The magnetized water is prepared according to the following way: using three GMX800 magnetizers, according to the water flow direction indicated by the magnetizers, successively placing on the outer wall of a rubber pipe with the pipe diameter of 20 mm, making the intervals between the magnetizers be 25 mm, and controlling ordinary water to pass through themagnetizers with the flow rate of 225 mL/s, to obtain the magnetized water.

The invention provides a sulfur fixation ash-fly ash compounded environment-friendly void grouting material as well as a preparation method and application thereof. The void grouting material is prepared from sulfur fixation ash, fly ash, a curing agent, an early strength agent, a water reducing agent, a defoaming agent, an expanding agent and water. In terms of performance, the strength of the grouting material can be adjusted and controlled by adjusting the proportion of the sulfur fixation ash, the fly ash and the curing agent in the formula; through the contents of the auxiliary agent andthe curing agent, the characteristics of high early strength and short curing time can be realized. Meanwhile, industrial solid wastes such as the sulfur fixation ash and the fly ash are adopted, so that the development requirement of China on environmental protection is met. Compared with a common cement-based grouting material on the market at present, the grouting material disclosed by the invention has the advantages of no air shrinkage phenomenon after being cured, capacity of keeping volume micro-expansion and excellent air shrinkage resistance. The cost of the disclosed grouting material is less than 180 yuan/m<3>, the cost performance is greatly improved, and the disclosed grouting material has great economic and social benefits.

The invention provides high-performance cement with high-content yellow phosphorus slag and a production process of the high-performance cement, and relates to the technical field of cement, the high-performance cement is prepared from the following raw materials in parts by weight: 100 parts of Portland cement clinker, 5-15 parts of gypsum, 60-110 parts of yellow phosphorus slag powder, 10-35 parts of nickel slag powder, 10-18 parts of zeolite powder, 6-11 parts of rectorite powder, 2-6 parts of hydrotalcite powder, 0.3-1.2 parts of cane sugar and 0.6-1.3 parts of alkali metal hydroxide. According to the invention, the stacking problem of the yellow phosphorus slag and the nickel slag is further solved, the additional value of the waste slag is improved, and the prepared cement product ishigh in strength and good in construction performance by matching with the zeolite powder, rectorite powder, hydrotalcite powder, sucrose, alkali metal hydroxide and the like.