73results about How to "Fully hydrated" patented technology

The present invention relates to preparation process of serial lignosulfonate air entraining and water reducing admixtures for concrete. The preparation process includes the following steps: dissolving solid lignosulfonate in water of the same weight, adding catalyst and oxidant, heating after reaction, adding amine and partial aldehyde to aminate, and dropping the rest aldehyde for condensation reaction to obtain the product; adding surfactant and polymer through stirring, and cooling to obtain liquid phase lignosulfonate as air entraining and water reducing admixture. The present invention is used as the admixture for concrete, and has relatively high water reducing rate, capacity of raising the strength of concrete, and certain setting retarding effect to delay the appearance of cement setting heat peak and reduce crack caused by temperature change.

The invention discloses a high-strength heat-resistant concrete and a preparation method thereof. The high-strength heat-resistant concrete comprises the following components in parts by weight: 300 to 350 parts of cement, 800 to 1100 parts of coarse aggregates, 400 to 500 parts of fine aggregates, 80 to 100 parts of coal ash, 5 to 10 parts of water reduction agent, 100 to 150 parts of mineral powder, 700 to 900 parts of gravels, 20 to 40 parts of early strengthening agent, 180 to 200 parts of water, 10 to 20 parts of steel fibers, and 5 to 10 parts of antirust agent; the coarse aggregates areprepared by mixing ceramic micro powder, blast furnace slag and basalt in a weight ratio of 1: (10 to 15): (30 to 50); and the fine aggregates are prepared by mixing 20 to 40 parts of silica fume, 10to 20 parts of expanded perlite and 15 to 30 parts of sintered magnesite. The high-strength heat-resistant concrete has the advantages of good compactness, high strength, high heat resistance, good workability and pumpability.

The invention relates to a preparation method of a low-grade activated coal ash composite material applied to cement and concrete. The low-grade activated coal ash composite material is prepared by taking the low-grade coal ash as a main raw material and slag, red mud, and other industrial waste residues, limestone powder and semi-hydrated gypsum as auxiliary materials through the combined action of physical milling and activating and chemical excitation. In the process of mixing concrete materials, 30% by weight of the activated coal ash composite material is used to replace PO52.5, PO42.5 or PO32.5 silicate cement; under the circumstance that other mixing materials remain the same, a great amount of cost can be saved for mixing the concrete per cube meter; the strength of the mixed concrete at all ages is equal to or higher than that of contrast concrete; the newly mixed concrete has the characteristics of high workability, low slump loss, low heat of hydration, good transitive performance of long-term strength, high resistance to sulfate attack, high chemical resistance, high durability, and the like; and the added coal ash composite material has no adverse effect on the performance of the concrete.

The invention discloses a high-performance grouting material for prefabricated buildings, which comprises the following raw materials in percentage by weight: a composite cementing material: 26-32% ofcement, 3-5% of fly ash, 2-5% of silica powder and 3-5% of slag powder, graded fine sand: 10%-13% of river sand of 20-40 meshes, 23%-30% of river sand of 40-70 meshes, 10%-18% of river sand of 70-140meshes and 2.5%-4.95% of quartz powder, auxiliary agents: 1%-2.5% of a water reducing agent, 0.3%-1.5% of an early strength agent, 0.5%-1.0% of a defoaming agent, 0.47%-3.0% of an expanding agent and0.05%-0.2% of a thickening agent, and a performance regulator: 0.05%-0.2% of a nano modified material and 0.03%-0.1% of a dispersing agent. The high-performance grouting material for prefabricated buildings has the advantages of early strength, quick hardening, quick and stable strength development, high flowability, micro expansion, no shrinkage, high breaking strength and fracture toughness, low cost and the like.

The invention discloses a chitosan sodium sulfonate containing concrete synergist and a preparation method thereof, and belongs to the field of a concrete additive. The synergist comprises chitosan sodium sulfonate, inorganic base, an epoxy compound, (3-epoxy propoxy propyl) allyloxy dimethoxy silicane, an initiator and water, wherein the initiator is a mixture made from one or more than two of sodium persulfate, potassium persulphate or ammonium persulfate. The preparation method comprises: adding weighed chitosan sodium sulfonate, inorganic base and water to a reaction vessel, then adding the epoxy compound and (3-epoxy propoxy propyl) allyloxy dimethoxy silicane to the reaction vessel; and adding the initiator to obtain the concrete synergist. The synergist improves the dispersity of cement particles, stimulates the action of cement, allows the hydration reaction to be fully carried out, improves the comprehensive properties of concrete, raises the strength level of concrete, saves the concrete consumption by about 10%, and reduces the production cost of concrete.

An additive of cement mortar for improving physical and mechanical properties to prevent crack generation and osmosis is proportionally prepared from montmorillonite powder, gypsum powder, benton, magnesium oxide, kaolin and disperser.

The invention provides a method for reinforced concrete work construction in cold winter. The method comprises the steps of erecting a steel skeleton at a construction site, selecting a plurality of steel bars as heat conductive steel bars, tying heating wires on the heat conductive steel bars, connecting all the heating wires to a power source, pouring concrete to enable the steel skeleton to beembedded in the concrete and obtaining a construction body after the concrete solidifies. According to the technical scheme of the present invention, by tying the heating wires on the plurality of steel bars, when the concrete is poured, the heating wires heat the interior of the concrete, so that the temperature inside the concrete is always maintained within a temperature range suitable for thehydration reaction, thus ensuring that the concrete can be solidified smoothly under cold conditions; and the strength of the concrete structure during solidification continues to grow. According to the invention, heat preservation measures are taken for the concrete by setting up a heat insulation shed, so that the concrete hydration reaction can be carried out more fully and completely, and a foundation is laid for improving the construction quality of the building body.

The invention discloses a durable granulated blast furnace slag building block and belongs to the technical field of a building material. The durable granulated blast furnace slag building block is prepared according to the following steps: crushing granulated blast furnace slag and sieving, thereby acquiring refined granulated blast furnace slag; mixing and stirring the acquired refined granulated blast furnace slag and sulfuric acid, soaking and filtering, thereby acquiring the pretreated granulated blast furnace slag; stirring, mixing and fermenting paper-making black liquor, chitosan solution, soybean protein powder and biogas slurry, thereby acquiring a fermentation liquor; mixing the pretreated granulated blast furnace slag and the fermentation liquor, soaking and filtering, therebyacquiring the modified granulated blast furnace slag; mixing and stirring the modified granulated blast furnace slag, gypsum, quicklime, cement, water, modified charring cocoanut fiber and silane coupling agent, thereby acquiring a mixed slurry; injecting the mixed slurry into a mold, pressing and forming, thereby acquiring a blank; placing the blank into a curing chamber and curing, thereby acquiring the durable granulated blast furnace slag building block. The durable granulated blast furnace slag building block provided by the invention has excellent mechanical properties and durability.

The invention belongs to the technical field of manufacture of building materials in cold regions, relates to a preparation method of anti-freezing cement mortar with rice husk ash and silica fume, and is intended to solve the problem that existing cement mortar has insufficient anti-freezing capacity and durability. The preparation method comprises the steps of calcining at a high temperature; performing ball milling; proportioning; mixing; vibrating; steam-curing at a high temperature. The preparation method has the advantages that rich husk ash and silica fume as industrial and agriculturalbyproducts contain massive active SiO2 and may be used as mineral admixtures to replace cement so that usage of building cement can be effectively reduced, with emission of CO2 upon cement productionreduced; therefore, waste is turned into wealth, energy is saved, and environment is protected; the rice husk ash is calcined at 800 DEG C, the interior network structure can be broken, and therefore, the finished material has greatly enlarged specific surface area, with the quantity of active SiO2 in the finished material also increased.

This invention discloses a method for preparing construction bricks by sintering fly ashes and red sandstone. The raw materials comprise: fly ashes, red sandstone, plasticizer (kaolin or bentonite), and water at a weight ratio of (50-60) :( 40-50) :( 1-5) :( 18-30). The fly ashes are the mass fly ashes from fluidized bed furnace and piled on the material field. The red sandstone is from waste roadbed materials or lost natural resources in mountain areas. The construction bricks can be used for bearing or non-bearing inner and outer walls. The method has such advantages as simple process, easy operation, high efficiency, low sintering temperature, low energy consumption, high performance and wide applications.

The invention discloses an adhesive special for sand aerated concrete boards and a preparation method of the adhesive. The adhesive comprises, by weight percentage, 25-30% of Portland cement, 50-58% of quartz sand, 15-20% of sand aerated concrete board waste, 1.5-2.0% of redispersible latex powder, 0.1-0.3% of hydroxypropyl methyl cellulose ether, 0.1-0.3% of wood fibers, 0.04-0.08% of starch ether and 0.1-0.2% of polypropylene fibers. The adhesive is good in water-retaining property and adhesive property, small in shrinkage ratio, high in crack resistance and less prone to interface crack generation, the recycled sand aerated concrete board waste is used as the raw material, and consistency with the color of a wall after filling is achieved.

The invention provides an earthwork filling material for use in cold area, which is formed by waste casting sand, fly ash, cement, polystyrene particles and water according to certain weight percentages. According to the test measurement, the density of the earth work filling material reaches between 0.97 and 1.35x10<3>kg/m<3>, the compression strength reaches between 60 and 292kPa/7 days, and the compression strength reaches between 116 and 664kPa/28 days; meanwhile, the earth work filling material also improve the freeze-thaw resistance, the coefficient of thermal conductivity reaches between 0.40 and 0.74W/(m.K)/7 days, and the coefficient of thermal conductivity reaches between 0.350 and 0.53W/(m.K)/28 days. The earthwork filling material can reduce the breakdown of an earth filling project caused by frozen expansion in the cold areas and recycle the waste casting sand and fly ash, which cause pollutions on environment, as earthwork filling materials in the earth filling project; moreover, the filling materials, which are secondary industrial wastes, are widely available and low in price, thereby reducing cost.

Provided is a construction method for repairing a reinforced concrete wall. An interface bonding agent is sprayed to a damaged concrete surface, and standing is carried out for 5-8 minutes after evenspraying. The interface bonding agent is composed of, by weight, 100 parts of ethyl acrylate, 5-10 parts of dodecyl alcohol ester, 2-6 parts of 2-(3, 4-cyclohexene oxide) ethyl trimethoxysilane, and 2-4 parts of polyether amine. According to the construction method for repairing the reinforced concrete wall, repairing materials added with antifreeze agents can increase the early temperature of concrete by accelerating the hydration process and heat releasing, the strength and durability of the concrete are improved, cracks and fractures are reduced, the repair materials can be operated at thelow temperature, the hardening can be quickly completed and hydration reaction is sufficient, and damaged concrete parts are effectively filled.

The invention discloses a fire-resistant pointing material in petroleum industry, and relates to the field of petrochemical industry. The fire-resistant pointing material comprises the following components by mass percent: 25-40% of silicate cement, 30-45% of powdery refractory mortar, 20-30% of coal ash, 8-12% of alumina micro powder, 0.5-1% of sodium tripolyphosphate or sodium hexametaphosphate or sodium silicate and the balance of water. The strength loss of counter-fire surface of mortar can be effectively reduced, the physical influence caused by high-temperature baking is borne by a protective layer, so that the average strength of the fire-resistant mortar is higher, and the potential quality hazard caused by the reduced strength of the counter-fire surface of the mortar is effectively avoided.

The invention discloses an industrial production process of high-strength self-compacting concrete, relates to the technical field of concrete production and processing, and solves the problem that the overall strength of the concrete is greatly reduced due to the fact that cement aggregates exist in a mixture and cannot be fully hydrated in the production process of the concrete. The industrial production process comprises the following steps: 1, preparing raw materials, 2, mixing the slurry, 3, preparing slurry, 4, preparing a mixed material, and step 5, discharging a finished product. According to the process, the mixed material obtained in the step 3 is heated to 50-60 DEG C in 5-10 seconds, then is subjected to heat preservation for 2-5 seconds, and finally is cooled to 20-30 DEG C in5-10 seconds along with continuous stirring to obtain the high-strength self-compacting concrete. In the application process, formation of cement aggregates can be avoided, the diffusion uniformity of cement particles is greatly improved, and the overall strength of concrete is improved.