104results about How to "Good anti-mud effect" patented technology

The invention discloses a mud-proof slump-retaining type polycarboxylate superplasticizer with low shrinkage and high adaptability and a low-temperature preparation method thereof. The polycarboxylatesuperplasticizer is mainly prepared by the following steps: carrying out free radical polymerization on 4-hydroxybutylvinyl polyoxyethylene ether, unsaturated carboxylic acid, an unsaturated amide-type monomer, dipolyethylene glycol maleate, an unsaturated quaternary ammonium cationic monomer, an oxidizing agent, a catalyst, a reducing agent, a chain transfer agent and deionized water at 5-15 DEGC through an aqueous solution, regulating pH value by adding a sodium hydroxide solution, and supplementing water. The preparation method of the invention has advantages of low-temperature production, no heat source, simple equipment, no pollution, short reaction time and high production efficiency. The prepared mud-proof slump-retaining type polycarboxylate superplasticizer endows concrete withgood workability, good adaptability, low shrinkage and high strength, has excellent mud-proof slump-retaining property, and greatly reduces construction difficulty.

The invention provides a super-early-strength PCE (polycarboxylate ether) superplasticizer. The super-early-strength PCE superplasticizer is a compound shown in formula (I) and is synthesized with active macro-monomers used as raw materials, the space hindrance effect of the superplasticizer is further improved, and meanwhile, positive ions with good cement resistance are introduced in molecules, so that the superplasticizing rate, the cement resistance and the cement adaptability of the superplasticizer are increased. The superplasticizer has better tolerance and cannot have a continuous intercalation reaction with the cement. The positive ions of the super-early-strength PCE superplasticizer can inhibit expansion of the cement so as to reduce adsorption of the cement to an additive. The super-early-strength PCE superplasticizer can accelerate the hydration function of the cement and has the super-early-strength function. The super-early-strength PCE superplasticizer has super-early-strength and cement-resistant functions in common concrete.

The invention provides a preparation method and application of an anti-soil polymer. The prepared polymer is used as a dispersant for a hydraulic cementing agent and / or an aqueous dispersion for potential hydraulic cementing agent and has good anti-soil performance. The preparation method the anti-soil polymer comprises a step of subjecting polyether macromonomer A with a special structure, monomer B containing a phosphoric acid or phosphorous acid group, optional monomer D and aldehyde C to condensation polymerization so as to prepare the anti-soil polymer, wherein the monomer D is selected from the group consisting of phenol, aniline, p- / o-aminobezene solfonic acid, p- / o-hydroxybenzoic acid, p- / o-aminobenzoic acid, p- / o-hydroxyezene solfonic acid, p- / o-toluidine and p- / o-methylphenol, a mol ratio of the polyether macromonomer A to the monomer B to the monomer D is 1: (0.5-12): (0-8.0), and a mol ratio of the polyether macromonomer A to the monomer B and the monomer D is 1: (0.5-12.0).

The invention discloses a preparation method of an ester type viscosity reduction type polycarboxylate superplasticizer. The method comprises the following steps: (1) preparing an esterified monomer; (2) conducting the copolymerization reaction; (3) conducting the neutralization reaction. According to the technical scheme of the preparation method, methyl methacrylate and dimethylaminoethanol, remaining after the preparation of the esterified monomer, are subjected to ester exchange in the same condition of preparing the esterified monomer so as to obtain dimethylaminoethyl methacrylate as a functional monomer. Therefore, the preparation method is cost-saving and simple in operation. In addition, the functional monomer is directly introduced into the copolymerization reaction to react with other cationic monomers. During the polymerization process, anions, cations and tertiary amine groups are attached to polycarboxylic acid molecular chains, so that the surface adsorbability of cement particles can be improved. The electrostatic repulsion effect between cement particles is improved. Not only the ester type viscosity reduction type polycarboxylate superplasticizer is good in anti-sludge effect for sand and gravel materials high in cement content, but also the ester type viscosity reduction type polycarboxylate superplasticizer is good in dispersibility and viscosity-reducing effect.

The invention provides a preparation method and application of a mud-resistant polycarboxylate superplasticizer. The mud-resistant polycarboxylate superplasticizer has the advantages of being low in mixing amount, high in water-reducing rate, long in slump resisting time and high in mud resistance when serving as a cement dispersing agent. The synthesis process is simple, the raw material utilization rate is high, a solvent is convenient to recycle, and production cost is low. According to the preparation method of the mud-resistant polycarboxylate superplasticizer, the mud-resistant polycarboxylate superplasticizer is obtained through the free radical polymerization reaction of specific unsaturated acid monomers, specific unsaturated polyether macromonomers and poly(N-vinyl pyrrolidone) chain containing PVP macromonomers, and the molar weight of the unsaturated polyether macromonomers is 50% to 100% that of the PVP macromonomers.

The invention discloses a star-like amphoteric polycarboxylate superplasticizer with efficient anti-mudding function and a preparation method thereof; the preparation method comprises: esterifying Beta-cyclodextrin and a dithioester compound with acyl halide groups to obtain star-structure reversible addition-fragmentation chain transfer agent (RAFT agent), initiating RAFT polymerization of (methyl)polyethylene glycol diacrylate, (methyl)acrylic acid and (methyl)acryloyloxyethyl trimethyl ammonium chloride under the action of the chain transfer agent and an initiator to obtain star-like amphoteric copolymer, and carrying out further processing to obtain the star-like amphoteric polycarboxylate superplasticizer having a solid content of 20% and efficient anti-mudding function. The polycarboxylate superplasticizer prepared herein has high water-reducing rate and efficient ant-mudding function and may meet high construction requirements.

The invention discloses a polycarboxylate superplasticizer containing phosphate groups. The polycarboxylate superplasticizer is prepared from, by weight, 70-80 parts of unsaturated polyether monomer, 0.3-1.0 part of hydrogen peroxide, 2-10 parts of carboxylic acid, 0-18 parts of carboxylic ester, 0.5-1.5 parts of chain transfer agent, 9-28 parts of deionized water X for feed liquid A preparation, 0.1-0.2 part of reductant, 18-26 parts of deionized water Y for feed liquid B preparation and 45-80 parts of deionized water Z for dissolving large unsaturated polyether monomers. Due to the fact that the phosphate groups are introduced to molecular chains, the polycarboxylate superplasticizer containing the phosphate groups is high in water reducing rate and good in slump retaining performance and has very good sulfate and mud resistance capability. A preparation method is simple, the polycarboxylate superplasticizer is synthesized under normal temperature, the energy consumption is low, inorganic phosphate serves as the chain transfer agent, the price is low, the material cost is low, higher-price chain transfer agents in a traditional process can be replaced, and industrial production is easy.

The invention discloses an anti-mud polycarboxylic acid slump retaining agent. The slump retaining agent is prepared from the following raw materials by weight percent: 50-75% of unsaturated polyoxyethylene ether monomer, 4-8% of acrylic acid, 6-12% of maleic anhydride, 11-20% of hydroxyethyl acrylate or hydroxypropyl acrylate, 0.5-3.0% of chain transfer agents, 0.1-5% of initiators and 0.01-2% of initiating additives. The invention also discloses a preparation method of the slump retaining agent. The preparation method comprises the following steps: dropwise adding a solution of acrylic acid, hydroxyethyl acrylate and hydroxypropyl acrylate and dropwise adding the initiating additives for 2-3.5 hours, and adding a sodium hydroxide solution to regulate the pH value to 6-7 after insulating for 1-1.5 hours, thus obtaining the anti-mud polycarboxylic acid slump retaining agent with solid content of 40-45%. The slump retaining agent has an obvious anti-mud effect in concrete and has an excellent slump retaining capacity.

The invention discloses a crosslinking-type low-sensitivity ester-ether copolymerized polycarboxylate superplasticizer and a preparation method thereof. The crosslinking-type low-sensitivity ester-ether copolymerized polycarboxylate superplasticizer has the number-average molecular weight of 10000-100000 and has a structural formula as shown in the specification. Under the synergistic effect of various groups, the polycarboxylate superplasticizer formed by copolymerization of 4-hydroxybutyl-vinyl polyoxyethylene ether, unsaturated acid, unsaturated phosphomonoester and unsaturated phosphodiester has the advantages of high water-reducing rate, high slump loss resistance, high peaceability, mud-resistant property and low dosage sensibility.

The invention provides a preparation method of polycarboxylic acid nanoparticles. The polycarboxylic acid nanoparticles are formed through copolymerizing a hydrophilic monomer unsaturated acid, a hydrophilic monomer polyethylene glycol monomethyl ether methacrylate, a hydrophilic monomer unsaturated sulfonate and a hydrophobic monomer styrene or (meth)acrylate, and have a linear microstructure in water. The water reducer applied to concrete has the advantages of low proportion, high water reduction, long slump retaining time and excellent mud resistance; and the polycarboxylic acids particles solves the water reducing and slump retaining problems of concrete without a super water reducer or an extra sacrificing agent when the mud content of aggregates is high, so the water reducer has good economic benefit.

The invention provides a polycarboxylate superplasticizer with super high early strength. The polycarboxylate superplasticizer with super high early strength is a compound shown in the formula (I) and is synthesized with an active macromonomer as the raw material, cations are introduced into molecules while the steric hindrance effect of the superplasticizer is further improved, the cations have good soil resistance, so that the water-reducing rate of the superplasticizer is increased, and the soil resistance and the cement adaptability of the superplasticizer are improved. The polycarboxylate superplasticizer has better tolerance for soil and does not have an intercalation reaction with the soil. The cations of the polycarboxylate superplasticizer with super high early strength can inhibit soil expansion, so that admixture adsorption by the soil is reduced. The polycarboxylate superplasticizer with super high early strength can accelerate hydration of cement and has the super high early strength function. The polycarboxylate superplasticizer with super high early strength has super high early strength and soil resistance functions when applied to common concrete.

The invention discloses a polycarboxylate superplasticizer with super high early strength and a preparation method of the polycarboxylate superplasticizer. A molecular structure of the polycarboxylate superplasticizer with super high early strength contains cationic charges, a hydration reaction of cement is promoted, strength development of hardened concrete is accelerated, and the super high early strength function is realized; the polycarboxylate superplasticizer has specific cement particle dispersion capability by the aid of specific amphiphilic structure and steric hindrance effect, the water-reducing rate is high, and the soil resistance is good.

The invention discloses a star-shaped amphoteric polycarboxylate superplasticizer and a preparation method thereof. The method includes: esterfying cyclodextrin to obtain a star-shaped initiator, initiating atom transfer radical polymerization of (methyl) polyethylene glycol acrylate, (methyl) sodium acrylate, (methyl) acryloyloxyethyl trimethyl ammonium chloride and (methyl) hydroxylethyl acrylate to obtain a star-shaped copolymer of the four monomers, and conducting further treatment to obtain a star-shaped amphoteric polycarboxylate superplasticizer with a solid content of 20%. The polycarboxylate superplasticizer prepared by the method provided by the invention has high water reducing rate and good mud resistance, meets high construction requirements, and has good application prospect.

The invention discloses an anti-clay polymer dispersing agent and a preparation method thereof. The anti-clay polymer dispersing agent is prepared from monomers A, B and E through polymerization, wherein the monomer A is an aromatic compound with carboxy or phosphate groups, the monomer B is aldehyde, and the monomer E is an aromatic compound with sulfonate groups or hydroxyl. The anti-clay polymer dispersing agent has excellent mud resistance.

The invention discloses a low-sensitivity anti-mud ether-ester copolymerized polycarboxylic acid water reducing agent and a preparation method thereof. The pH value is 6.0-6.5, and the solid content is 45-55%. The pH value is 6.0-7.0, and the solid content is 45-55%. The water reducing agent is composed of the following components in parts by weight: 10-100 parts of 4-hydroxybutylvinyl polyoxyvinyl ether with the molecular weight of 2000-5000, 10-100 parts of methoxypolyethylene glycol methacrylate, 6-10 parts of unsaturated monocarboxylic acid, 3-6 parts of unsaturated carboxylate monomer, 2-5 parts of dibutyl itaconate, 1-5 parts of unsaturated amphoteric quaternary alkylphosphonium salt, 0.2-0.8 part of oxidizer, 0.2-1.0 part of first reducer, 0.02-0.06 part of second reducer, 0.2-0.6 part of chain-transfer agent, a right amount of potassium hydroxide water solution, a right amount of sodium hydroxide water solution and a right amount of deionized water. The polycarboxylic acid water reducing agent has the advantages of more uniform side chain distribution and favorable slump retaining effect, and has excellent low sensitivity to the doping amount changes.

The invention discloses a mud resistant slow release type slump retaining agent containing a cyclodextrin side group and a preparation method thereof. The method synthesizes a mud resisting ester monomer by introducing a beta-cyclodextrin structural unit with appropriate steric hindrance and better water solubility to be subjected to an esterification reaction with fumaric acid. In alkaline environment of cement hydration, with the slow release of the mud resisting ester monomer, the beta-cyclodextrin introduced into the molecular structure of a water reducer can effectively weaken interpenetration between water reducer molecules and a clay layer because particles of the beta-cyclodextrin distribute in a range of 0.53-1.78 nm which is close to 1.44-1.86 nm that is the interlayer spacing ofbentonite, and so the polycarboxylic acid water reducer is good in mud resistance and slump retaining effect. Meanwhile, a phosphoric acid monomer is introduced into the molecular structure of the water reducer to further improve the mud resisting effect. The mud resistant slump retaining type polycarboxylic acid water reducer containing a cyclodextrin side group prepared by the method of the invention has the advantages of low dosage, long slump retaining time, strong mud resistance and the like, and is easy in synthesis process, safe, environmentally friendly and low in production cost.

The invention discloses an anti-mud type low-slump-loss polycarboxylic acid water reducing agent and a preparation method thereof, and relates to the technical field of synthesis of concrete admixtures. Specifically, from the effect of a molecular structure and an initial pH value of a reaction system on the performance of a product, during a synthesis process, tartaric acid is selected as an adjusting catalyst of the initial pH value of the reaction system in a kettle, monomers succinic acid monoethyl propionyl oxyethyl ester and 2-allyloxy sodium ethanesulfonate having a special water reducing function, monomers cis-1-propylene phosphonic acid and 2-allyloxy sodium ethanesulfonate having a special anti-mud function, and monomers methoxyethyl acrylate, succinic acid monoethyl propionyl oxyethyl ester and isopentenol polyoxyethylene ether with the molecular weight M of 1400 having a special slump retaining function are introduced; after the reaction is finished, an organic alkali diethanolisopropanolamine is used for neutralizing, and the anti-mud type low-slump-loss polycarboxylic acid water reducing agent is synthesized. The reducing agent has the advantages of low alkali content, fast early strength achieving of concrete, and high strength, can significantly improve the workability and the slump retention of the concrete prepared by high-mud-content aggregates, has relatively good anti-mud ability, and also has the advantages of low gradual loss of newly blended concrete, high strength of hardened concrete, good durability and the like.

The invention discloses a preparation method for a cationic side chain esterified-grafted highly-mud-resistant cement dispersing agent, and belongs to the field of dispersing agents. The preparation method comprises the following steps: performing free radical polymerization on an unsaturated carboxylic acid monomer serving as a reactant to obtain a polycarboxylic acid main chain under the action of an initiator and a chain transfer agent, performing free radical polymerization on an unsaturated cationic quaternary ammonium salt monomer serving as a reactant to obtain a hydroxyl-terminated cationic side chain under an oxidization-reduction initiation system formed by high-valence ceric salt and alcohol, and performing esterification-grafting reaction on the polycarboxylic acid main chain, the hydroxyl-terminated cationic side chain and a polyethylene glycol compound in the presence of a catalyst. According to the preparation method, a process is simple and easy to control, and the preparation method is low in cost, energy-saving, efficient, environment-friendly and free of pollution; a composite side chain structure is modified and synthesized by a molecular structure design, so that side chain steric hindrance effects are successfully achieved, cationic charge arrangement is successfully implemented, water reduction and slump retaining characteristics and clay side effect suppression capabilities higher than those of an ordinary polycarboxylic acid water reducing agent are achieved, and the dispersing agent has broad market prospect and great popularization and application potential.

The invention discloses an anti-mud type polycarboxylate water reducing agent and a preparation method thereof. The polycarboxylate water reducing agent is a copolymer formed by polymerizing unsaturated polyether macromonomers, unsaturated cationic functional monomers containing glucosyl groups and acrylic acid as raw materials in the presence of an initiator and a chain transfer agent through a free radical copolymerization reaction; the unsaturated polyether macromonomer is selected from any one or two of APEG, HPEG or TPEG; the initiator is selected from at least one of hydrogen peroxide, ammonium persulfate or potassium persulfate; the chain transfer agent is selected from at least one of mercaptopropionic acid, mercaptoacetic acid, sodium methallyl sulfonate or sodium allylsulfonate.The molecular side chain of the polycarboxylate water reducing agent designed and synthesized by the method not only contains a glucose group, but also contains a quaternary ammonium salt group; compared with an existing polycarboxylate water reducing agent, the polycarboxylate water reducing agent has higher adsorption capacity, a glucose structure can form a stable solvated water film on the surfaces of cement particles when being dissolved with cement, direct contact between the cement particles is prevented, hydration is hindered, and the slump loss resistance is improved.

Belonging to the field of dispersants, the invention provides a method for preparation of high mud resistant polycarboxylic acid dispersant by unsaturated halogenated hydrocarbon copolymerization and grafting with a cationic side chain. The method consists of: employing an unsaturated carboxylic acid monomer, an unsaturated halogenated hydrocarbon monomer, an unsaturated cationic quaternary ammonium salt monomer, a polyethylene glycol compound and the like as the raw materials, firstly conducting main chain copolymerization, then polymerizing the cationic side chain, performing functionalization, and finally carrying out etherification grafting so as to synthesize the excellent performance high mud resistant polycarboxylic acid dispersant material with unsaturated halogenated hydrocarbon copolymerized and grafted with cationic side chain, i.e. taking unsaturated carboxylic acid and unsaturated halogenated hydrocarbon as the reactants, conducting free radical polymerization to obtain a carboxylic acid-halogenated hydrocarbon copolymer main chain, using high valence cerium salt-alcohol to initiate polymerization of an unsaturated cationic quaternary ammonium salt monomer so as to obtain a hydroxyl terminated cationic side chain, then modifying the hydroxyl terminated cationic side chain and the polyethylene glycol compound to obtain a functionalized side chain, and carrying out etherification grafting of the functionalized side chain on the carboxylic acid-halogenated hydrocarbon copolymer main chain. The method provided by the invention realizes high water reduction, slump loss resistance, high clay resistance and other multiple effects.

The invention provides a mud resistant type water reducing agent and a preparation method therefor. The water reducing agent is prepared by copolymerizing a monomer A, a monomer B and a monomer C. The monomer B is unsaturated carboxylic acid monomers; the monomer C is unsaturated ester monomers. The structure of the monomer A is shown in the description: R1 is hydrogen or methyl; R2 is alkylidene with 1 to 5 carbon atoms; R3 is phenylene or benzylene; m and n are integers greater than zero, m is greater than or equal to 1 and less than or equal to 180, and n is greater than or equal to 1 and less than or equal to 3.

The invention relates to the field of concrete admixtures, and particularly discloses a mud-resistant polycarboxylate superplasticizer and a preparation method thereof. The mud-resistant polycarboxylate superplasticizer is prepared from the following raw materials in parts by weight through polymerization: 5 to 15 parts of acrylic acid, 10 to 25 parts of hydroxyethyl methylacrylate, 25 to 35 parts of 2-methyl-2-butenoic acid, 6 to 10 parts of sodium ethyl methacrylate sulfonate, 30 to 40 parts of allyl polyoxyethylene ether, 1 to 3 parts of an initiator, 1 to 2 parts of a chain transfer agent and 1 to 2 parts of a sacrificial agent. The preparation method of the mud-resistant polycarboxylate superplasticizer comprises the steps of solution preparation, heating reaction and acidity neutralization, and the prepared mud-resistant polycarboxylate superplasticizer has a good anti-mud effect and also has good dispersity and fluidity.

The invention discloses a solid anti-mud ultra-slow release polycarboxylate slump retention agent and a preparation method of the slump retention agent. The preparation method comprises the followingsteps of: (1) esterification: allowing methacrylic acid, saturated acid and 3-di(2-ethoxyl) amino-2-hydroxyl propanesulfonate to react to prepare an unsaturated esterification micromonomer by the action of a catalyst, (2) melt polymerization: adding unsaturated polyether and 4-hydroxybutyl vinyl polyoxyethylene ether into a reaction kettle for polymerization reaction in a molten state, and (3) solidification and slicing: after the reaction, performing vacuumizing through a mechanical pump to remove an organic solvent, and then performing slicing through a condensation slicer to form the whiteflaky solid polycarboxylate slump retention agent. The prepared slump retention agent has a good anti-mud effect and good slump retention ability for a long time.

The invention relates to the technical field of building materials, and particularly relates to a preparation method of a polycarboxylate water reducer containing a complexing anti-mud structure. The preparation method comprises the following steps: (1) uniformly mixing an unsaturated polyether macromonomer, an unsaturated acid monomer, an unsaturated halogen monomer, a chain transfer agent and an initiator, and carrying out a reaction at 70-90 DEG C for 2-3 hours; and (2) adding an unsaturated phosphate monomer into the reaction system, and carrying out a reaction at 80-110 DEG C for 4-6 hours to obtain the polycarboxylate water reducer containing the complexing anti-mud structure, wherein the weight ratio of the unsaturated polyether macromonomer to the unsaturated acid monomer to the unsaturated phosphate monomer to the unsaturated halogen monomer to the chain transfer agent to the initiator is (28-36):(1.3-4):(2.5-6):(1.5-4):(0.2-0.5):(0.1-0.6). The preparation method provided by the invention provides the polycarboxylate water reducer with good water reducing rate, slump retaining property and mud resistance.

The invention discloses a preparation method of a highly mud resistant water reducing agent with graft copolymerization of a cation side chain for concrete, belonging to the field of water reducing agents. The highly mud resistant water reducing agent material with graft copolymerization of a cation side chain for concrete is synthesized by a method of carrying out cation side chain polymerization reesterification first and then graft copolymerization, i.e. an unsaturated cation quaternary ammonium salt monomer as a reactant carries out free radical polymerization in an oxidation-reduction initiation system composed of high-valence cerium salt and alcohols to obtain a terminal hydroxyl cation side chain, then unsaturated carboxylic acid, the terminal hydroxyl cation side chain and methoxy polyethylene glycol carry out esterification under the effect of a catalyst to produce two macromonomers, and then an unsaturated carboxylic acid monomer, a cation side chain macromonomer and a polyether side chain macromonomer as reactants carry out free radical graft copolymerization under the effects of an initiator and a chain transfer agent to obtain the highly mud resistant water reducing agent with graft copolymerization of the cation side chain for concrete. The process of the preparation method has the advantages of simple steps, high efficiency, immediacy, convenience in regulation and control, energy saving and environment protection, a composite side chain structure is synthesized creatively, and the effects of water reducing, slump loss resistance and inhibition in clay side effects are realized.

The invention discloses a preparation method of a polymeric cement concrete additive. The method comprises the following steps of (1) preparation of furan ether polycondensate, (2) preparation of naphthalene sulfonate-modification furan ether polycondensate and (3) ion exchange between the naphthalene sulfonate-modification furan ether polycondensate and polyquaternium-10. The invention further discloses the polymeric cement concrete additive prepared through the preparation method of the polymeric cement concrete additive. The polymeric cement concrete additive has the advantages that functions are diverse, the strength, the flowability and the durability of a concrete material are improved and perfected, the impermeability effect is more significant, the doping amount is less, and the plastification performance is more excellent, and the performance of a reinforced concrete body is not affected negatively.

The invention discloses a preparation method of a mud-resistant viscosity-reduction type polycarboxylic acidplasticizer. The method comprises the following steps of (1) carrying out esterification reaction;(2) carrying out copolymerization reaction;(3) carrying out neutralization reaction. According to the preparation method provided by the invention, an unsaturated hydroxy ester and a compound Aare esterified, an unsaturated monomer with a phosphate group, an ester group and an amino group simultaneously is prepared and is then copolymerized and synthesized with excessive unsaturated hydroxyester in esterification, unsaturated carboxylic acid or unsaturated carboxylic acid anhydride and unsaturated silicon-containing small monomer, and a carboxy group, the phosphate group, the amino group, a silicon oxygen group, the ester group and a hydroxyl group are introduced into a molecular structure of the product, so that under a synergistic effect of various groups, the polycarboxylic acidplasticizer provided by the invention has higher water-reducing rate and a high slump loss resistant property.

The invention discloses a super early strength polycarboxylate water-reducer, and a preparation method thereof. The molecular structure of the super early strength polycarboxylate water-reducer contains cationic charges which are capable of promoting cement hydration reaction, and accelerating strength development of concrete, so that super early strength effect is achieved; and the super early strength polycarboxylate water-reducer possesses excellent cement particle dispersing capacity, high water-reducing rate, and excellent soil resistance because of an unique amphipathic structure and steric-hinerance effects.

The invention discloses an anti-mud water reducer and a preparation method thereof, the anti-mud water reducer is prepared from the following raw material components in parts by mass: 30-50 parts of TPEG, 1-5 parts of acrylic acid, 5-10 parts of sodium methallyl sulfonate, 2-8 parts of a monoalkenyl cyclodextrin monomer, 1-5 parts of polyethylene glycol-4000, 1-5 parts of cellulose ether, a properamount of a sodium hydroxide water solution and a proper amount of deionized water. The water reducer is good in anti-mud adaptability, low in doping amount, high in water reducing effect and stablein quality.

The invention discloses a castor oil-based quaternary ammonium salt anti-mud agent and a preparation method thereof. The anti-mud agent is prepared from ricinoleic acid, N, N-dimethyl-1, 3-propane diamine and epoxy chloropropane; and the specific preparation method comprises the following steps: putting castor oil and a catalyst into a reaction container, introducing nitrogen, dropwise adding N, N-dimethyl-1, 3-propane diamine while stirring at room temperature, heating for reaction after dropwise adding is finished, and treating to obtain ricinoleic acid amide; and putting ricinoleic acid amide into a reaction container, introducing nitrogen, slowly dropwise adding epoxy chloropropane while stirring, controlling the temperature at 48 DEG C, heating to 50 DEG C after dropwise adding is finished, carrying out heat preservation reaction for 1 hour, removing excessive epoxy chloropropane with n-hexane, and carrying out vacuum drying to obtain a finished product. The anti-mud agent can quickly adsorb mud, reduce the mixing amount of polycarboxylate superplasticizers and ensure the performance of concrete, and the preparation method has the advantages of easily available synthesis raw materials, mild reaction conditions, biodegradable product, no influence on the environment, and low synthesis cost and post-treatment cost.