Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

1797 results about "Superplasticizer" patented technology

Superplasticizers (SP's), also known as high range water reducers, are additives used in making high strength concrete. Plasticers are chemical compounds that enable the production of concrete with ca. 15% less water content. Superplasticers allow reduction in water content by 30% or more. These additives are employed at the level of a few weight percent. Plasticizers and superplasticizers retard the curing of concrete.

Preformed material for post-tensioned prestressing pipeline vacuum grouting or mudjacking and preparation method thereof

The invention discloses a preformed material for post-tensioned prestressing pipeline vacuum grouting or mudjacking and a preparation method thereof. The preformed material includes the following components by weight percent: 65 to 95 percent of silicate cement, 0.01 to 3 percent of high-range water-reducing agent, 0 to 1 percent of stabilizing agent, 0.05 to 5 percent of retarding agent, 1 to 20 percent of expanding agent, 0.2 to 2 percent of corrosion inhibitor, 0.01 to 1 percent of air entraining agent and 0 to 30 percent of mineral materials, wherein by uniformly and proportionally mixing the silicate cement, the high-range water-reducing agent, the stabilizing agent, the retarding agent, the expanding agent, the corrosion inhibitor, the air entraining agent and the mineral materials, the post-tensioned prestressing pipeline vacuum grouting or mudjacking preformed material can be obtained. After being uniformly mixed and stirred with water with neutral pH value according to the water cement ratio ranging from 0.24 to 0.32, the preformed material can be used, the obtained grouting material has the advantages of low water cement ratio, favorable flowability, no water bleeding and delamination, and favorable pumpability; meanwhile, the preparation method of the preformed material is simple and the raw material sources of the preformed material are wide.
Owner:HUBEI CHIDGE TECH

Viscosity-control type polycarboxylate superplasticizer and preparation method thereof

The invention discloses a viscosity-control type polycarboxylate superplasticizer and a preparation method thereof. The method includes: mixing 2-10wt% of an unsaturated acid monomer (A), 18-45wt% of an unsaturated polyoxyethylene macromonomer (B), 1-5wt% of a viscosity-control monomer (C) and the balance water (a total weight of 100%), then adding the mixture into a reaction kettle, adding an initiator solution dropwisely for 2-4h under 70-90DEG C to trigger polymerization, further performing heat preservation reaction for 1-3h under 70-90DEG C, then carrying out natural cooling to 45DEG C, and adjusting the pH value to 6.0-8.0, thus obtaining the viscosity-control type polycarboxylate superplasticizer. The viscosity-control type polycarboxylate superplasticizer has stable performance, and the dosage of each raw material component can be adjusted according to needs, so that the flowability and viscosity requirements of construction concrete can be satisfied, and the bleeding and segregation problems of fresh concrete are solved. The viscosity-control type polycarboxylate superplasticizer provided by the invention has the advantages of easily available raw materials, simple preparation process, cleanliness and safety, easy industrial production and the like, and has broad industrial application prospects.
Owner:CHINA BUILDING MATERIALS ACAD

Preparation method of mud resisting and slump retaining type phosphate group containing polycarboxylate superplasticizer

The invention discloses a preparation method of a mud resisting and slump retaining type phosphate group containing polycarboxylate superplasticizer. The preparation method comprises the following specific steps that 1, a halogen containing polycarboxylate superplasticizer prepolymer is prepared, wherein halogen containing unsaturated monomers, halogen containing unsaturated acid small monomers and halogen containing unsaturated polyether macromonomers or unsaturated ester macromonomers are subjected to an oxidation-reduction radical polymerization reaction to obtain the halogen containing polycarboxylate superplasticizer prepolymer; 2, the halogen containing polycarboxylate superplasticizer prepolymer and alkyl phosphate are subjected to an Arbuzov reaction to obtain a phosphate group containing copolymerization product, the pH value is adjusted after reacting is completed, water is added, and then the polycarboxylate superplasticizer is obtained. The mud resisting and slump retaining type phosphate group containing polycarboxylate superplasticizer prepared through the method has the advantages of being low in mixing amount, high in water reducing ratio, long in slump retaining time and high in mud resisting property, can avoid the adverse effect brought by mud containing aggregate in concrete and is simple in synthesis process, easy to control and low in production cost.
Owner:JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD

Method for producing high-strength high damping concrete

The invention relates to a preparation method of concrete with high strength and high damp. The invention is characterized in that the preparation method includes the following steps: firstly, the pretreatment of the light aggregate: (1) the feeding and vibration reduction treatment of the light aggregate: the light aggregate adsorbs the polymer to obtain feeding and vibration reduction treatment light aggregate; (2) sealing and reinforcing treatment on the surface of the feeding and vibration reduction treatment light aggregate: the feeding and vibration reduction treatment light aggregate obtained at the first step is put into sealing and reinforcing treatment slurry to mix for 1 to 3 minutes, then being fished out, and then conserved for 3 days in the condition of 85 percent to 95 percent of relative humidity and the temperature of 23 DEG C to 27 DEG C, wherein, pretreatment light aggregate is obtained; secondly, preparation for the concrete with high strength and high toughness: the concrete with high strength and high toughness is formed by evenly mixing water, common coarse aggregate, the pretreatment light aggregate, cement, fine aggregate, mineral addition, fibre, emulsified polymer and high efficiency water reducing agent. The invention can effectively increase the strength and the damp performance of the concrete.
Owner:WUHAN UNIV OF TECH

Nano reinforcing method for recycled aggregate concrete

The invention discloses a nano reinforcing method for recycled aggregate concrete, which belongs to the technical fields of recycling comprehensive utilization of waste and production of building materials, and is mainly characterized by comprising the steps of: mixing and stirring a recycled aggregate and a nano particle dispersion for 5-10s; after the surface of the recycled aggregate is in a moist state, further mixing the recycled aggregate with all admixtures for 5-10s; and mixing and stirring with cement, water and a high-efficiency water reducing agent for 20-45s to obtain a nano-reinforced recycled aggregate concrete mixture. The nano reinforcing method has a principle that by changing a stirring process and introducing the nano dispersion, nano particles can be adsorbed into the opening pores and microcracks of the recycled aggregate, an admixture enriched layer is further formed on the surface of the recycled aggregate, the nano particles permeating into the interiors of the opening pores of the recycled aggregate and the admixture enriched layer formed on the surface of the recycled aggregate are used for jointly absorbing calcium hydroxide enriched on the surface and the pores of the recycled aggregate in the strength development process of the recycled aggregate concrete, a gelling material with higher strength is generated through hydration, liquid-phase or solid-phase reactions so as to reinforce the recycled aggregate per se and an interface between the recycled aggregate and set cement, and thus, the strength of the recycled aggregate concrete is enhanced. After the nano reinforcement, the recycled aggregate concrete has the 28-day compression strength improved by around 15-20%.
Owner:ZHEJIANG UNIV +1

Preparation method of viscosity-reducing type polycarboxylate superplasticizer

InactiveCN104262550ALow viscosityReduce thixotropyPolyesterHalogen
The invention relates to a preparation method of a viscosity-reducing type polycarboxylate superplasticizer. The preparation method comprises the following specific steps: firstly stirring acid anhydride small monomers containing unsaturated double bonds and binary primary amine type organic small molecules at a certain temperature to generate unsaturated primary amine type small monomers; then adding organic small molecules containing epoxy groups and the organic small molecules containing halogen groups into a generated reaction system of the unsaturated primary amine type small monomers and continuously stirring for 5-72h to obtain products, namely quaternary ammonium salt type unsaturated small monomers; and further performing water-phase free radical polymerization reaction on the quaternary ammonium salt type unsaturated small monomers, unsaturated ester type small monomers, unsaturated acid type small monomers and unsaturated polyester large monomers under the action of an initiator and a chain transfer agent, adjusting the pH value after the reaction and adding water to obtain the viscosity-reducing type polycarboxylate superplasticizer. The viscosity-reducing type polycarboxylate superplasticizer prepared by the method provided by the invention has the advantages of simple reaction, easiness in control, low cost and the like. Furthermore, the viscosity of concrete can be reduced, the slump retention can be improved.
Owner:JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD

Ultra-high strong concrete having ultra-high pumping performance and method for preparing the same

A super-high concrete with super-high pumping capability and a corresponding preparation method particularly relate to the super-high concrete with super-high pumping capability and the preparation method. The concrete is mainly used for high buildings, long-span bridges, high-speed railways, large-scale tunnels, ocean crude oil platforms, nuclear power engineering and defense engineering, etc. large-scale civil engineering. The concrete is composed of the following components by weight percentage: 11.9 to 16.2 percent of cement, 4.2 to 12.2 percent of compound industrial waste slag, 0.25 to 0.58 percent of super plasticizer, 0.16 to 0.25 percent of water-preserving thickening air-inducting component, 4.8 to 5.7 percent of water, 26.7 to 29.4 percent of sand and 41.6 to 44.3 percent of stone; wherein, the total amount of cementitious material (the total amount of cement and various industrial waste slag) is 500 to 615kg, and the compound industrial waste slag occupies 20 to 50 percent of the total amount of cementitious material; the water-cement ratio is 0.20 to 0.28; the super plasticizer occupies the 1.1 to 2.5 percent of the total amount of cementitious material, and the water-preserving thickening air-inducting component occupies 0.8 to 1.0 percent of the total amount of cementitious material, and the sand rate is 30 to 40 percent.
Owner:SOUTHEAST UNIV

Polycarboxylic acids series concrete high efficiency water reducing agent and synthesizing process

The invention relates to a water reducing agent with high efficiency used in polycarboxylate concrete and a synthetic method thereof, which is characterized in that: plyethylene glycol methylacrylic acid single armor esterification (MPEGMA) macromonomer synthesized by (methyl) acrylic and polyethylene glycol monomethyl ether added with catalyst and other (methyl) acrylic or (methyl) allyl sodium monomer are grafted and copolymerizated to synthesize into binary or polybasic copolymer comprising carboxyl, sulfonic group and polyoxyethylene chain side under the effect of initiator and chain transfer agent. The products synthetically prepared by the invention has the advantages of high water reducing ratio, low chlorine and low alkali; the cement mixture is high in fluidity and good in mixability, and can restrain slump loss effectively, when 0.7 to 1.2 percent by weight of cement material is added. The water reducing agent with high efficiency used in polycarboxylate concrete is simple in technology, easy in control of reaction condition and reasonable in cost, does not pollute environment, and can be used as the important component of high performance concrete, marine concrete, nuclear power station concrete and anticorrosion concrete and is widely used in the field of industry, civil building, water conservancy, road traffic and nuclear power engineering.
Owner:SHANGHAI SHENLI BUILDING MATERIAL

High efficiency aliphatic sulfonate water reducing agent and method for preparing same

InactiveCN1634794AExcellent water reducing rateImprove performanceHigh strength concreteSuperplasticizer
The present invention relates to a high efficiency water reducing agent for manufacturing high performance cement based material such as high-strength concrete, fluid state and/or pumping concrete, etc. and method for preparing same. The invention takes ketones compound and aldehydes as condensation monomer, and sulphite as sulphonating agent, and take condensation reaction in alkaline aqueous solution. Then a water-soluble high-polymer condensate containing hydrophilic group such as sulfonic group, carboxy, hydroxyl, etc. in molecule with molecular weight ranging from 3000 to 10000 is obtained. By changing the matching, charging sequence of raw material, the technological process is simplified, the reaction time is shortened, and burst boiling and geling phenomena are also avoided at the same time. By controlling charging rate and condensation temperature, the condensation product is made with required molecular weight and can meet application performance. The fatty group sulphonate condensation compound made by the invention can be served as high efficiency water reducing agent of cement concrete, the water reducing, dispersion and reinforcing effects are better than the traditional albocarbon group high efficiency water reducing agent. The water reducing agent provided by the invention has the advantages of wide raw material source, simple synthesizing process, clean and suitable for industrial production.
Owner:吴霖秀 +2
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products