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46results about How to "High water reduction efficiency" patented technology
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Modified chitosan efficient retarding and water-reducing agent and preparation method and using method thereof
The invention discloses a modified chitosan efficient retarding and water-reducing agent and a preparation method and a using method thereof. Chitosan and itaconic anhydride react to prepare double-bond modified chitosan; the modified chitosan, acrylic monomer and sodium allysulfonate are subjected to copolymerization reaction; the product of polymerization reaction is compounded with a retarder to obtain the modified chitosan efficient retarding and water-reducing agent. The modified chitosan efficient retarding and water-reducing agent prepared by the preparation method provided by the invention has the characteristics of high water-reducing efficiency, high adaptability, long retarding time, capability of being used together with a polycarboxylate-type water-reducing agent, and the like.
Owner:江西富创新材料有限公司
Allyl polyglycol ether polycarboxylic acid water reducer and synthetic method thereof
InactiveCN102617063AHigh polymerization activitySolve the problem of low contentMaleopimaric acidPolymer science
The invention discloses a synthetic method of an allyl polyglycol ether polycarboxylic acid water reducer. According to the method, allyl ether polyethylene glycol macromers, maleic anhydride (MA), acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid (AMPS) and the like are used as main raw materials, a water-soluble hydroperoxide is used as an initiator, a transition metal salt is used as a catalyst, and polymerization is initiated in a specific pH range (2.5-6.0). The method makes the content of maleic acid in a polymer be greatly improved, the water reduction effect be good, and the product cost be greatly reduced and the product applicability be extensive especially replacing parts of acrylic acid by maleic acid, so the method is convenient for industrialized production and popularization.
Owner:CHANGZHOU INST OF CHEM
Method for producing water reducer of cement concrete
The present invention relates to the production process of water reducer for cement and concrete, and belongs to the field of building material technology. The water reducer consists of calcium lignosulfonate, p-aminobenzenesulfonic acid, phenol, alkali and formaldehyde, and is produced into water preparation via adding water in 1-3 times. The production process includes heating water to 85-100 deg.c, adding the said materials successively via stirring, cooling to room to form water preparation, or further drying to form powder preparation. The present invention has the advantages of low temperature and normal pressure production, easy control of technological process, no environmental pollution, high function of controlling flowability loss of cement slurry and concrete and no harm to concrete durability.
Owner:冯乃谦
Preparation and application of hyperbranched retarder
InactiveCN109265619AImprove compatibilityHigh water reduction efficiencyHyperbranched polymersPolymer
The invention relates to the technical field of concrete additives, and more specifically relates to application of a hydroxyl terminated hyperbranched polyester hyperbranched retarder in adjustment of retardation time of concrete. A new hyperbranched retarder is synthesized by synthesizing a carboxyl terminated hyperbranched polymer first, then performing end capping on the carboxyl terminated hyperbranched polymer, and synthesizing the hydroxyl terminated polymer into a main chain. When used in the field of concrete additives, the hyperbranched retarder can well improve the mobility of concrete and prolong the retardation time, and the hyperbranched retarder has a simple and convenient synthesis process, is easy to industrialize and has superior performance.
Owner:UNIV OF JINAN
Preparation method of polycarboxylate superplasticizer
The invention relates to a preparation method of a polycarboxylate superplasticizer, belonging to the technical fields of building materials and cement concrete admixtures. The polycarboxylate superplasticizer is prepared by taking methylallyl polyethylene glycol and acrylamide as reaction monomers and sodium dodecyl sulfonate as a surface absorption activator, adding a chain transfer agent and an initiator, and finally, regulating the PH value to 6-7 by using an alkaline solution. The polycarboxylate superplasticizer is high in yield and good in performance; and due to the addition of sodium dodecyl sulfonate, the saturation rate of charges adsorbed by particles on a concrete surface can be increased, the flowability of cement in concrete stirring can be improved, the stirring time can be shortened, the efficiency can be increased, and an anti-adhesion effect is better taken. The polycarboxylate superplasticizer is simple in preparation process, low in cost, high in water reducing efficiency, good in cement and concrete compatibility and capable of effectively improving the flowability, slump constant, superstrength and durability of concrete.
Owner:新疆玉鑫蕊科技开发有限责任公司
Low slump loss modified naphthalene series water-reducing agent and preparation method thereof
InactiveCN101759393AHigh water reduction efficiencyGood slump performanceWater reducerReducing agent
The invention discloses a low slump loss modified naphthalene series water-reducing agent which is characterized in that: the water-reducing agent is formed by mixing 87-97 percent of naphthalene series water-reducing agents and 3-13 percent of oxidation-etherification starch by weight percentage; by adopting the invention, the water-reducing agent contains a great amount of hydroxyl, cement hydration can be prevented, so as to lead the cement hydration products to be uniform and improve the slump-blocking performance of the water-reducing agent; the water-reducing agent in the invention is applied to the cement, the reducing amount of the mobility is more than 6 percent after two hours, 28d intensity is improved by more than 12 percent, therefore, the invention not only can ensure the water-reducing effect and reduce the slump economic loss, but also can effectively improve the cement and concrete intensity.
Owner:SICHUAN HUASHI GREEN HOMELAND BUILDING MATERIALS
Concrete water reducing agent prepared from waste leather slag and preparation method of concrete water reducing agent
The invention discloses a concrete water reducing agent prepared from waste leather slag. The concrete water reducing agent is prepared from the following materials in parts by mass: 100-120 parts of clean waste leather slag, 200-240 parts of water, 0.5-1 part of a permeating agent JFC, 1-1.2 parts of 2709-alkaline protease, 30-40 parts of formaldehyde with the mass percentage of 36%, 2-5 parts of a sodium hydroxide solution with the mass percentage of 40%, 4-6 parts of sodium tripolyphosphate, a modifier and a sulfonation reagent. The invention further discloses a preparation method of the concrete water reducing agent prepared from the waste leather slag; the concrete water reducing agent prepared by the preparation method is high in water reducing efficiency; the preparation technology is unique, and the usability is high; a new way is supplied to recycling the waste leather slag produced by a leather enterprise, and a new raw material is provided for preparation of the water reducing agent.
Owner:江苏硕泰建筑科技有限公司
Modified melamine water reducer and preparation method thereof
The invention relates to the field of concrete admixture and discloses a modified melamine water reducer and a preparation method thereof. An organic long chain is introduced to a molecular terminal position of the modified melamine water reducer, the mole ratio of a long-chain raw material to formaldehyde is 1:1 during synthesis of the organic long chain, and the mole ratio of melamine to formaldehyde to sodium hydrogen sulfite to a terminal-group long chain is 1: (3.5-3.8): (1.5-2.0): (0.03-0.05). The invention further discloses the preparation method of the modified melamine water reducer. The preparation method comprises steps as follows: synthesizing the terminal-group long chain; adding formaldehyde and sodium hydrogen sulfite for hydroxymethylation and sulfonation reactions of melamine; performing a condensation polymerization reaction under the acidic condition; adding alkali for reforming and weak bond fission of polymer molecules, and removing formaldehyde residues. A water reducer molecule main chain is introduced to a terminal position of the long chain through a condensation reaction of hydroxyl groups in a solution, space steric hindrance is added to a dispersion system, the repulsive interaction among cement particles is further improved, and the water reducing effect is further improved.
Owner:SUZHOU XINGBANG CHEM BUILDING MATERIALS
Slow-release high-efficiency polycarboxylate water reducer and preparation method thereof
Owner:SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
Efficient concrete water-reducing agent and preparation method thereof
The invention discloses an efficient concrete water-reducing agent and a preparation method thereof, and belongs to the technical field of concrete additives. Acrylic acid is used as a raw material, and polyethylene glycol monomethyl ether is added. Through an esterification reaction, a macromonomer is obtained; and citric acid is added for modification to reduce formation of calcium silicate hydrated gel so as to obtain higher water-reducing rate. L-aspartic acid is used as a raw material, and carboxyl anions are formed. Then, the water-reducing agent still can be greatly dispersed under thecondition of hard water to play a water-reducing effect. By introducing triethanolamine, solubility of concrete particle surface is raised, and water-reducing efficiency is enhanced. Problems of existing water-reducing agents, such as poor hard water resistance and low water-reducing efficiency are solved.
Owner:YANGQUAN GAOXING BUILDING MATERIAL ADDITIVE CO LTD
Method for preparing polyether polycarboxylic acid type high-efficiency water reducing agent from polyethylbenzene tower bottom high-boiling residues
ActiveCN113698546AImprove workabilityHigh water reduction rateOrganic-compounds/hydrides/coordination-complexes catalystsCatalytic reactionsMolecular sieveCarbon nanotube
The invention relates to a method for preparing a polyether polycarboxylic acid type high-efficiency water reducing agent from polyethylbenzene tower bottom high-boiling residues. The polyether polycarboxylic acid type high-efficiency water reducing agent is prepared by free radical polymerization of arone olefin, a double-bond-containing macromonomer and a micromolecular monomer, and the arone olefin is prepared by catalytic acylation of poly-ethylbenzene sulfonic acid and unsaturated acylate by using a bifunctional molecular sieve encapsulated catalyst. The bifunctional molecular sieve encapsulated catalyst is prepared by one-step hydrothermal reaction of sodium metaaluminate, sodium hydroxide, modified silicon dioxide, N,N,N-trimethyl-1-amantadine, carbon nanotubes and (2,2'-bipyridine) nickel diiodide. The polyethylbenzene sulfonic acid is prepared by sulfonating the high-boiling residues at the bottom of a polyethylbenzene tower. According to the method, the polyethylbenzene tower bottom high-boiling residues serve as raw materials, polyether polycarboxylic acid type high-efficiency water reducing agent molecules are prepared through the steps of sulfonation, acylation, free radical polymerization and the like, and the polyether polycarboxylic acid type high-efficiency water reducing agent is practically applied to the building field and has important significance in resourceful treatment of the ethylbenzene tower bottom high-boiling residues.
Owner:CHINA PETROLEUM & CHEM CORP +1
Preparation method of inorganic fireproof door core material
ActiveCN105481461ARapid hardening early strengthImprove fire performanceCeramicwareFoaming agentSulfate
The invention discloses a preparation method of an inorganic fireproof door core material, and belongs to the technical field of fireproof materials. The preparation method of the inorganic fireproof door core material is characterized by comprising the following steps that 1, cement slurry is prepared, wherein 1 part of sulfate aluminum cement, 0.002-0.01 part of water reducing agent, 0.002-0.01 part of basalt fiber and 0.3-0.4 part of water are mixed to be uniform for use; 2, a foam body is prepared, wherein a foaming agent is diluted, and the foam body is prepared; 3, the foam prepared in the second step and the cement slurry prepared in the first step are mixed according to the proportion of 2-6 mL / g, stirring is conducted to be uniform, the obtained mixture is poured into a mold, standard curing is conducted for 24 h, demolding is conducted, and then natural curing or standard curing is conducted for 7-28 days, and the inorganic fireproof door core material is obtained. When the inorganic fireproof door core material is subjected to a flame, dripping matter does not exist on the surface, the phenomena of curling and melting do not exist, and the inorganic fireproof door core material has the advantages of being good in use property and fireproof property and environmentally friendly.
Owner:JIAHUA SPECIAL CEMENT
High-efficiency water reducing agent for high-strength concrete
ActiveCN110294605AHigh water reduction efficiencyImprove liquiditySodium polyacrylateHigh strength concrete
The invention belongs to the technical field of concrete admixtures, and particularly relates to a high-efficiency water reducing agent for high-strength concrete. The high-efficiency water reducing agent is prepared from, by weight, 3-6 parts of polyglyceryl-10 myristate, 5-8 parts of sodium tripolyphosphate, 2-5 parts of sodium polyacrylate, 4-9 parts of sodium dodecylbenzene sulfonate, 10-12 parts of hydrolyzed polymaleic anhydride (HPMA), 3-7 parts of zinc salt, 5-12 parts of maltodextrin, 5-10 parts of N,N'-dinitrosopentamethylenetetramine, 5-10 parts of azodicarbonamide, 3-4 parts of N,N-dimethylcyclohexylamine, 6-8 parts of polyacrylamide (PAM), 15-20 parts of hydroxyethyl cellulose, 8-16 parts of sodium carboxymethylcellulose, 13-20 parts of a naphthalenesulfonate formaldehyde condensate and 3-6 parts of an auxiliary agent. The water reducing agent has various types of hydrophilic groups, high water-reducing efficiency and good fluidity, can obviously improve the fluidity of the concrete, has a remarkable early strengthening effect after final setting, and can significantly improve the strength of the concrete at various ages.
Owner:江苏昆腾新材料科技有限公司
Method for preparing polyether polycarboxylic acid type high-efficiency water reducing agent from polyethylbenzene tower bottom high-boiling residues
ActiveCN114752020AImprove workabilityHigh water reduction rateOrganic-compounds/hydrides/coordination-complexes catalystsCatalytic reactionsPolymer sciencePtru catalyst
The invention relates to a method for preparing a polyether polycarboxylic acid type high-efficiency water reducing agent from polyethylbenzene tower bottom high-boiling residues. The polyether polycarboxylic acid type high-efficiency water reducing agent is prepared by free radical polymerization of arone olefin, a double-bond-containing macromonomer and a micromolecular monomer, and the arone olefin is prepared by catalytic acylation of poly-ethylbenzene sulfonic acid and unsaturated acylate by using a bifunctional molecular sieve encapsulated catalyst. The bifunctional molecular sieve encapsulated catalyst is prepared by one-step hydrothermal reaction of sodium metaaluminate, sodium hydroxide, modified silicon dioxide, N, N, N-trimethyl-1-amantadine, carbon nanotubes and (2, 2 '-bipyridine) nickel diiodide, and the polyethylbenzene sulfonic acid is prepared by sulfonating high-boiling residues at the bottom of a polyethylbenzene tower. According to the method, the polyethylbenzene tower bottom high-boiling residues serve as raw materials, polyether polycarboxylic acid type high-efficiency water reducing agent molecules are prepared through the steps of sulfonation, acylation, free radical polymerization and the like, and the polyether polycarboxylic acid type high-efficiency water reducing agent molecules are practically applied to the building field and have important significance in resourceful treatment of the ethylbenzene tower bottom high-boiling residues.
Owner:CHINA PETROLEUM & CHEM CORP +1
Aliphatic concrete water reducing agent and preparation process thereof
Owner:JIANGSU NIGAO SCI & TECH +1
Anti-shock and anti-abrasion concrete for hydropower engineering and preparation method of anti-shock and anti-abrasion concrete
InactiveCN109516756AImprove abrasion resistanceImprove crack resistanceFiber(Hydroxyethyl)methacrylate
The invention discloses concrete with high shock and abrasion resistant capacity for hydropower engineering. The concrete is prepared from the following raw materials in parts by weight: 30-50 parts of yellow sand, 3-5 parts of blast furnace slag powder, 15-25 parts of fly ash, 5-10 parts of silica powder, 30-50 parts of cement, 10-15 parts of potassium feldspar powder, 10-15 parts of medium sand,2-4 parts of kaoline, 3-5 parts of anhydrite, 3-5 parts of fibers, 3-5 parts of high-strength steel-wire-like fibers, 2-4 parts of aluminum nitride, 1-3 parts of mullite, 0.4-0.6 part of hydroxyethylmethylacrylate, 0.1-0.3 part of zinc acetate, 2-4 parts of rubber powder, 3-5 parts of styrene, 2-4 parts of resorcinol, 0.1-0.3 part of lauryl sodium sulfate, 5-10 parts of a plasticizer, 4-6 partsof triethanolamine, 6-8 parts of a nano material, and 2-4 parts of a water reducer. The concrete has the excellent anti-shock and anti-abrasion properties, air shrinkage deformation of the concrete iseffectively lowered, and thus the anti-cracking capacity of the concrete for the hydropower engineering is improved.
Owner:国网四川省电力公司技能培训中心 +1
A modified chitosan high-efficiency retarding water reducer and its preparation method and use method
Owner:江西富创新材料有限公司
Method for preparing cement water reducer by utilizing styrene-acryonitrile copolymer waste
The invention relates to a method for preparing cement water reducer by utilizing styrene-acryonitrile copolymer waste, comprising the following steps: selecting 10 parts of foamed plastic waste of styrene-acryonitrile copolymer, 60-100 parts of concentrated sulfuric acid and 0-40 parts of organic solvent in parts by weight; evenly mixing the above materials; stirring at the temperature of 70-100 DEG C, reacting for 2-7 hours; separating and purifying the product to obtain powder production. The styrene-acryonitrile copolymer foamed plastic waste is derived from styrene-acryonitrile copolymer foamed plastic powder, wherein, the monomer mole ratio of styrene to acryonitrile is 10-70 to 90-30. The solvent is used by adopting one of or mixture of more than one of cyclohexane, 1, 2-dichloroethane and pyridine. Tests indicate that the product of the invention has certain water reducing property and higher water reducing efficiency to cement, and the highest water reducing rate can reach over 20%. The invention also has low product cost, simple production technology, excellent comprehensive performance and certain competitive advantage compared with the same products on the market; on the other hand, the invention solves the pollution problem of waste plastics to environment.
Owner:TIANJIN UNIV
Preparation and application of hydroxyl-terminated hyperbranched polyamide retarder
The invention relates to the technical field of concrete admixtures, more specifically, the invention relates to application of a hydroxyl-terminated hyperbranched polyamide retarder in adjusting theretarding time of concrete. Firstly, a hydroxyl-terminated hyperbranched polymer is synthesized, and then the hydroxyl-terminated hyperbranched polymer is subjected to addition polymerization, so thata novel hydroxyl-terminated hyperbranched polyamide retarder is synthesized. The hydroxyl-terminated hyperbranched polyamide retarder is applied to the field of concrete additives, so that the flowing property of concrete can be well improved, the retarding time is prolonged, the synthesis process is simple and convenient, the industrialization is easy, and the retarder is excellent in performance.
Owner:UNIV OF JINAN
Multifunctional concrete additive and preparation method thereof
InactiveCN109650767ASimple manufacturing methodMild reaction conditionsCarboxylic acidBeta-Cyclodextrins
The invention provides a multifunctional concrete additive. The additive includes, by weight, 25-35 parts of polybazedoxifene-beta-D-glucuronide 2,2'-benzidinedisulfonic acid amide, 10-15 parts of polyoxyethylene lauryl ether carboxylic acid modified mono(6-polyethylene polyamine-6-deoxy)beta cyclodextrin, 5-10 parts of active silicon powder, 5-10 parts of ethanol, and 25-35 parts of water. A preparation method of the additive is also disclosed. The additive has advantages of being excellent in comprehensive performance, various in function, significant in concrete maintenance effect and lessin content.
Owner:杨记周
A kind of preparation method of polycarboxylate water reducer
ActiveCN104892856BLow double bond activityLow self-aggregation ratioSuperplasticizerPolyethylene glycol
The invention relates to a preparation method of a polycarboxylate water reducer, belonging to the technical field of building materials and cement concrete admixtures. The polycarboxylate water-reducer of the present invention uses methallyl polyethylene glycol and acrylamide as reaction monomers, uses sodium dodecylsulfonate as surface adsorption active agent, and adds chain transfer agent and initiator agent, and finally adjust the pH to 6-7 with lye to prepare the water reducer. The polycarboxylate superplasticizer of the present invention has high yield and good performance, and the added sodium dodecylsulfonate can promote the saturation rate of the adsorption charge of concrete surface particles, increase the flowability of cement in concrete mixing, and reduce the mixing time , improve efficiency, and play a better anti-adhesion effect. The polycarboxylate water-reducer of the invention has simple preparation process, low cost, high water-reducing efficiency, good compatibility with cement and concrete, and can effectively improve the fluidity, slump, super strength and durability of concrete.
Owner:新疆玉鑫蕊科技开发有限责任公司
Renewable plant cellulose water reducing agent for cements
The present invention discloses a renewable plant cellulose water reducing agent for cements, and the water reducing agent consists of the following components: plant cellulose, high-concentration alkali, oxidizing agents and a solvent; wherein the weight ratio of the plant cellulose, the solvent and the high-concentration alkali is 1:10-15:1.5-3; the weight ratio of the plant cellulose, the solvent and the oxidizing agents is 1:0.8-1.2:0.8-1.2; and the weight ratio of the plant cellulose and a solid alkali is 0.8: 1.2. The invention also discloses a preparation method for the renewable plant cellulose water reducing agent for cements. The water reducing agent provided by the invention is high in water absorption efficiency, and low-carbon and environmentally friendly in components and the preparation process.
Owner:SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
A kind of preparation method of inorganic fireproof door core material
ActiveCN105481461BRapid hardening early strengthNo melting phenomenonCeramicwareFoaming agentSulfate
The invention discloses a preparation method of an inorganic fireproof door core material, and belongs to the technical field of fireproof materials. The preparation method of the inorganic fireproof door core material is characterized by comprising the following steps that 1, cement slurry is prepared, wherein 1 part of sulfate aluminum cement, 0.002-0.01 part of water reducing agent, 0.002-0.01 part of basalt fiber and 0.3-0.4 part of water are mixed to be uniform for use; 2, a foam body is prepared, wherein a foaming agent is diluted, and the foam body is prepared; 3, the foam prepared in the second step and the cement slurry prepared in the first step are mixed according to the proportion of 2-6 mL / g, stirring is conducted to be uniform, the obtained mixture is poured into a mold, standard curing is conducted for 24 h, demolding is conducted, and then natural curing or standard curing is conducted for 7-28 days, and the inorganic fireproof door core material is obtained. When the inorganic fireproof door core material is subjected to a flame, dripping matter does not exist on the surface, the phenomena of curling and melting do not exist, and the inorganic fireproof door core material has the advantages of being good in use property and fireproof property and environmentally friendly.
Owner:JIAHUA SPECIAL CEMENT
Concrete water reducing agent prepared by using waste dander and preparation method thereof
Owner:江苏硕泰建筑科技有限公司
Renewable plant cellulose water reducing agent for cements and preparation method thereof
Owner:SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
Concrete additive and preparation method thereof
InactiveCN109250948ASimple manufacturing methodRaw materials are easy to getPentaerythritolPolyphenyl ether
The invention provides a concrete additive which comprises the following components in parts by weight: 5-10 parts of polyurethane modified fly ash, 20-30 parts of indolyl sulfo diphenyl ketone polyphenyl ether, 10-15 parts of MPEG-2000-DSPE, 10-15 parts of pentaerythritol and 10-15 parts of deionized water. The invention also discloses a preparation method of the concrete additive. The preparation method of the concrete additive disclosed by the invention is simple and feasible, the raw materials are easy to obtain, the preparation cost is low, the dependence on equipment is small, and the method is suitable for large-scale production; the prepared concrete additive has various functions, is more obvious in improvement effect on the strength, fluidity, durability and impermeability of concrete, and has the advantages of being less in using amount and more excellent in comprehensive performance.
Owner:魏菊宁
A kind of retarding type composite water reducer for refractory castable containing silica fume and preparation method thereof
ActiveCN111484342BHigh water reduction efficiencyImprove applicabilityMelt-holding vesselsDischarge devicesSodium phosphatesSilicon oxide
Owner:苏州盛曼特新材料有限公司
A high-efficiency water reducer for high-strength concrete
The invention belongs to the technical field of concrete admixtures, and particularly relates to a high-efficiency water reducing agent for high-strength concrete. The high-efficiency water reducing agent is prepared from, by weight, 3-6 parts of polyglyceryl-10 myristate, 5-8 parts of sodium tripolyphosphate, 2-5 parts of sodium polyacrylate, 4-9 parts of sodium dodecylbenzene sulfonate, 10-12 parts of hydrolyzed polymaleic anhydride (HPMA), 3-7 parts of zinc salt, 5-12 parts of maltodextrin, 5-10 parts of N,N'-dinitrosopentamethylenetetramine, 5-10 parts of azodicarbonamide, 3-4 parts of N,N-dimethylcyclohexylamine, 6-8 parts of polyacrylamide (PAM), 15-20 parts of hydroxyethyl cellulose, 8-16 parts of sodium carboxymethylcellulose, 13-20 parts of a naphthalenesulfonate formaldehyde condensate and 3-6 parts of an auxiliary agent. The water reducing agent has various types of hydrophilic groups, high water-reducing efficiency and good fluidity, can obviously improve the fluidity of the concrete, has a remarkable early strengthening effect after final setting, and can significantly improve the strength of the concrete at various ages.
Owner:江苏昆腾新材料科技有限公司
A kind of high-efficiency concrete water reducing agent and preparation method thereof
ActiveCN108821634BGood steric hindrance effectStrong water absorptionCalcium silicatePolyethylene glycol
Owner:YANGQUAN GAOXING BUILDING MATERIAL ADDITIVE CO LTD
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