CN111574105A - Environment-friendly composite early strength water reducing agent and preparation method thereof - Google Patents
Environment-friendly composite early strength water reducing agent and preparation method thereof Download PDFInfo
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- CN111574105A CN111574105A CN202010486285.XA CN202010486285A CN111574105A CN 111574105 A CN111574105 A CN 111574105A CN 202010486285 A CN202010486285 A CN 202010486285A CN 111574105 A CN111574105 A CN 111574105A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
Abstract
The invention discloses an environment-friendly composite early strength water reducing agent which is characterized by comprising the following components in parts by weight: 15-20 parts of 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer, 4-8 parts of hyperbranched polylysine, 2-5 parts of sodium alginate, 4-7 parts of celestite, 1-3 parts of similar spar, 1-3 parts of N- (3-triethoxysilylpropyl) glucamide and 30-40 parts of water. The invention also discloses a preparation method of the environment-friendly composite early strength water reducing agent. The environment-friendly composite early strength water reducing agent disclosed by the invention has the advantages of obvious early strength water reducing effect and small mixing amount, can effectively improve the compressive strength of concrete, reduce the shrinkage rate of the concrete and shorten the production period of the concrete, has no obvious negative effect on the comprehensive performance of the concrete, and is environment-friendly in the preparation and use processes.
Description
Technical Field
The invention relates to the technical field of concrete additives, in particular to an environment-friendly composite early strength water reducing agent and a preparation method thereof.
Background
With the acceleration of the modernization construction pace of cities, various major building engineering projects are coming, and the major building engineering projects brand the modernization civilization footprint of the modern cities with fashionable, beautiful and safe elements, and become an attractive scenic line of the modern cities. Behind these major construction projects, various construction engineering materials are indispensible, and concrete is one of the most common construction engineering materials, and is prepared by taking cement as a gel material and sand and stone as aggregates and adding water for mixing. In the preparation process of concrete, the admixture is indispensable and is a key factor for determining the quality of concrete, and the development of the concrete admixture with excellent comprehensive performance is particularly important.
The concrete admixture is a material which is added in the process of mixing concrete and can improve one or more properties of the concrete according to requirements, the adding amount of the concrete admixture is generally less than 5 percent of the cement amount, but the workability, the strength and the durability of the concrete can be obviously improved or the setting time can be adjusted, and the cement can be saved. The concrete admixtures in the prior art are various, and the admixtures are often single in performance and easy to generate antagonism when mixed together. The early strength water reducing agent is the combination of water reducing agent and early strength agent, has the functions of early strength, water reduction and reinforcement, belongs to a natural oxidation additive, can promote hydration and hardening of cement, shortens the curing period of concrete products, accelerates the construction speed and improves the turnover rate of templates and sites.
The common early strength water reducing agent in the prior art is a high-efficiency early strength water reducing agent which takes a beta-naphthalenesulfonate formaldehyde condensation compound as a main component and is compounded with a reinforcing component, has the characteristics of good adaptability to cement varieties, small air entraining amount and the like, has obvious water reducing and reinforcing effects, has obvious early strength effect, can improve the frost resistance, impermeability and durability of concrete, however, the early strength water reducing agent has great pollution in the production and use processes, and brings a great deal of adverse effects to the environment and the health of constructors. Other types of early strength water reducing agents on the market have the defects of poor early strength effect, low later strength, high production cost, easy bleeding segregation, insufficient early strength and poor conveying performance, and the risk of concrete frosting and alkaline aggregate reaction hazards is easily caused to a greater or lesser extent.
The Chinese invention patent with the application number of 201810390806.4 discloses a special early strength water reducing agent for prefabricated parts, which comprises the following components: the water-based paint comprises a polycarboxylic acid water reducing agent, a toughening agent, nano perlite, triethanolamine, calcium formate, sodium nitrite, calcium oxide, sodium sulfate, an anti-corrosion additive, a high-molecular surface penetrating agent, a foam inhibitor, superfine wollastonite powder, dilauryl thiodipropionate and water. The invention can effectively improve the compressive strength of the concrete prefabricated part, reduce the shrinkage rate, shorten the production period, improve the uniformity and the surface smoothness of the concrete prefabricated part, and ensure that the surface of the concrete prefabricated part is more compact and has high strength. However, sodium nitrite which is a toxic and harmful substance is added, the sodium nitrite is oxidized in the air, the action time is supplemented, and the sodium nitrite is easy to decompose under the weak acid condition to produce nitrogen oxide gas, so that the early strength water reducing agent is not environment-friendly and has low performance stability.
Therefore, the development of an environment-friendly composite early strength water reducing agent which has obvious early strength water reducing effect, can effectively improve the compressive strength of concrete, reduce the shrinkage rate of the concrete, shorten the production period of the concrete, has no obvious negative effect on the comprehensive performance of the concrete, and is green and environment-friendly in the preparation and use processes is urgently needed.
Disclosure of Invention
In view of the above, the invention aims to provide an environment-friendly composite early strength water reducing agent, which has the advantages of obvious early strength water reducing effect, small mixing amount, capability of effectively improving the compressive strength of concrete, reducing the shrinkage rate of the concrete, shortening the production period of the concrete, no obvious negative effect on the comprehensive performance of the concrete, and environmental protection in the preparation and use processes. Meanwhile, the invention also provides a preparation method of the environment-friendly composite early strength water reducing agent, and the preparation method is simple and easy to implement, mild in condition, small in equipment dependence, suitable for continuous large-scale production and high in social value, economic value and ecological value.
In order to achieve the purpose, the invention adopts the technical scheme that:
the environment-friendly composite early strength water reducing agent is characterized by comprising the following components in parts by weight: 15-20 parts of 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer, 4-8 parts of hyperbranched polylysine, 2-5 parts of sodium alginate, 4-7 parts of celestite, 1-3 parts of similar spar, 1-3 parts of N- (3-triethoxysilylpropyl) glucamide and 30-40 parts of water.
Further, the preparation method of the 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer comprises the following steps: adding 3- (1-naphthyl) acrylic acid, 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, 4-vinyl-2, 3-dihydrobenzofuran, alliin and initiator into high boiling point solvent, stirring and reacting for 3-5 hours at 70-80 ℃, cooling to room temperature, and removing high boiling point solvent and micromolecular substances by rotary evaporation to obtain the 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer.
Preferably, the mass ratio of the 3- (1-naphthyl) acrylic acid, the 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, the 4-vinyl-2, 3-dihydrobenzofuran, the alliin, the initiator and the high-boiling-point solvent is 2:1:1:0.5 (0.04-0.05): 14-20.
Preferably, the initiator is at least one of azobisisobutyronitrile and azobisisoheptonitrile.
Preferably, the high boiling point solvent is at least one of dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone.
Preferably, the hyperbranched polylysine is hyperbranched polylysine G4, and the preparation method is as follows: example 1 with application number 201910264905.2.
Preferably, the particle size of the celestite is 100-300 meshes.
Preferably, the particle size of the spinel-like material is 200-400 meshes.
Further, the preparation method of the environment-friendly composite early strength water reducing agent comprises the following steps: mixing the components uniformly according to a certain proportion, adding sodium hydroxide, regulating pH to 6.5-7.5, and stirring at 50-60 deg.C for 2-4 hr.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
(1) the preparation method of the environment-friendly composite early strength water reducing agent provided by the invention is simple and feasible, mild in condition, small in equipment dependence, suitable for continuous large-scale production and high in social value, economic value and ecological value.
(2) The environment-friendly composite early strength water reducing agent provided by the invention overcomes the defects that the traditional early strength water reducing agent has more or less risks of easily causing concrete frosting and alkaline aggregate reaction harm, has poor early strength effect, low later strength, high production cost, easy generation of bleeding segregation, insufficient early strength, poor conveying performance and poor environmental protection property, and has the advantages of obvious early strength water reducing effect, small mixing amount, capability of effectively improving the compressive strength of concrete, reducing the shrinkage rate of the concrete, shortening the production period of the concrete, no obvious negative influence on the comprehensive performance of the concrete, and environmental protection in the preparation and use processes.
(3) The invention provides an environment-friendly composite early strength water reducing agent, which is a copolymer of 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin, carboxyl and sulfonic group on a molecular chain are negatively charged, so that cement particles are easily dispersed mutually through electrostatic interaction in concrete, a flocculation structure is disintegrated, wrapped water is released to participate in flowing, and the fluidity of a concrete mixture is effectively increased; the zwitterionic structure on the side chain can be beneficial to the proceeding of hydration reaction, the compressive strength of concrete is effectively improved, the benzofuran, naphthyl and alliin structures are simultaneously introduced on the molecular chain, and under the double effects of electronic effect and steric effect, the early strength water reducing property is effectively improved under the synergistic effect.
(4) The environment-friendly composite early strength water reducing agent provided by the invention is added with hyperbranched polylysine and sodium alginate, can synergistically act with hydrophilic groups on a copolymer molecular chain, reduce the surface tension of the copolymer molecular chain, remarkably improve the compressive strength of concrete, and further improve the early strength water reducing property.
(5) The environment-friendly composite early strength water reducing agent provided by the invention has the advantages that the addition of celestite and similar spar not only plays a role in enhancing, but also can play a role in improving early strength, beryllium in the similar spar is amphoteric metal and can chemically react with alkali of concrete, the efflorescence phenomenon is effectively avoided, and meanwhile, the strength, impermeability and waterproof performance of the concrete can be effectively improved through the reaction; the addition of the N- (3-triethoxysilylpropyl) glucamide is beneficial to the compatibility among all the components, and further improves the comprehensive performance of the concrete.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
In the embodiment of the invention, the raw materials are all purchased commercially; the hyperbranched polylysine is hyperbranched polylysine G4, and the preparation method is as follows: example 1 with application number 201910264905.2.
Example 1
The environment-friendly composite early strength water reducing agent is characterized by comprising the following components in parts by weight: 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer 15 parts, hyperbranched polylysine 4 parts, sodium alginate 2 parts, celestite 4 parts, similar spar 1 part, N- (3-triethoxysilylpropyl) glucamide 1 part and water 30 parts.
The preparation method of the 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer comprises the following steps: adding 3- (1-naphthyl) acrylic acid, 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, 4-vinyl-2, 3-dihydrobenzofuran, alliin and azodiisobutyronitrile into dimethyl sulfoxide, stirring and reacting for 3 hours at 70 ℃, then cooling to room temperature, and removing dimethyl sulfoxide and micromolecular substances by rotary evaporation to obtain a 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer; the mass ratio of the 3- (1-naphthyl) acrylic acid to the 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt to the 4-vinyl-2, 3-dihydrobenzofuran to the alliin to the azodiisobutyronitrile to the dimethyl sulfoxide is 2:1:1:0.5:0.04: 14.
The particle size of the celestite is 100 meshes; the particle size of the spinel-like particle is 200 meshes.
The preparation method of the environment-friendly composite early strength water reducer comprises the following steps: the components are uniformly mixed according to a proportion, then sodium hydroxide is added, the PH is adjusted to 6.5, and the mixture is stirred for 2 hours at 50 ℃.
Example 2
The environment-friendly composite early strength water reducing agent is characterized by comprising the following components in parts by weight: 16 parts of 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer, 5 parts of hyperbranched polylysine, 3 parts of sodium alginate, 5 parts of celestite, 1.5 parts of similar spar, 1.5 parts of N- (3-triethoxysilylpropyl) glucamide and 33 parts of water.
The preparation method of the 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer comprises the following steps: adding 3- (1-naphthyl) acrylic acid, 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, 4-vinyl-2, 3-dihydrobenzofuran, alliin and azodiisoheptanonitrile into N, N-dimethylformamide, stirring and reacting for 3.5 hours at 73 ℃, cooling to room temperature, and removing N, N-dimethylformamide and small molecular substances by rotary evaporation to obtain 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymers; the mass ratio of the 3- (1-naphthyl) acrylic acid to the 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt to the 4-vinyl-2, 3-dihydrobenzofuran to the alliin to the azodiisoheptanonitrile to the N, N-dimethylformamide is 2:1:1:0.5:0.043: 16.
The particle size of the celestite is 150 meshes; the particle size of the spinel-like particle is 250 meshes.
The preparation method of the environment-friendly composite early strength water reducer comprises the following steps: the components are uniformly mixed according to the proportion, then sodium hydroxide is added, the PH is adjusted to 6.8, and the mixture is stirred for 2.5 hours at the temperature of 52 ℃ to obtain the liquid.
Example 3
The environment-friendly composite early strength water reducing agent is characterized by comprising the following components in parts by weight: 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer 17.5 parts, hyperbranched polylysine 6 parts, sodium alginate 3.5 parts, celestite 5.5 parts, spar-like 2 parts, N- (3-triethoxysilylpropyl) glucamide 2 parts and water 35 parts.
The preparation method of the 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer comprises the following steps: adding 3- (1-naphthyl) acrylic acid, 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, 4-vinyl-2, 3-dihydrobenzofuran, alliin and azodiisobutyronitrile into N-methylpyrrolidone, stirring and reacting for 4 hours at 75 ℃, cooling to room temperature, carrying out rotary evaporation to remove N-methylpyrrolidone and small molecular substances, thus obtaining 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymers; the mass ratio of the 3- (1-naphthyl) acrylic acid to the 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt to the 4-vinyl-2, 3-dihydrobenzofuran to the alliin to the azodiisobutyronitrile to the N-methylpyrrolidone is 2:1:1:0.5:0.045: 17.
The particle size of the celestite is 200 meshes; the particle size of the spinel-like material is 300 meshes.
The preparation method of the environment-friendly composite early strength water reducer comprises the following steps: the components are uniformly mixed according to the proportion, then sodium hydroxide is added, the PH is adjusted to 7, and the mixture is stirred for 3 hours at the temperature of 55 ℃.
Example 4
The environment-friendly composite early strength water reducing agent is characterized by comprising the following components in parts by weight: 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer 18 parts, hyperbranched polylysine 7 parts, sodium alginate 4 parts, celestite 6 parts, similar spar 2.5 parts, N- (3-triethoxysilylpropyl) glucamide 2.7 parts and water 38 parts.
The preparation method of the 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer comprises the following steps: adding 3- (1-naphthyl) acrylic acid, 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, 4-vinyl-2, 3-dihydrobenzofuran, alliin and initiator into high boiling point solvent, stirring and reacting for 4.7 hours at 78 ℃, cooling to room temperature, and removing high boiling point solvent and micromolecular substances by rotary evaporation to obtain a 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer; the mass ratio of the 3- (1-naphthyl) acrylic acid, the 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, the 4-vinyl-2, 3-dihydrobenzofuran, the alliin, the initiator and the high-boiling point solvent is 2:1: 0.5:0.048: 19; the initiator is formed by mixing azodiisobutyronitrile and azodiisoheptonitrile according to the mass ratio of 3: 5; the high boiling point solvent is formed by mixing dimethyl sulfoxide, N-dimethylformamide and N-methylpyrrolidone according to the mass ratio of 1:3: 2.
The particle size of the celestite is 280 meshes; the particle size of the spinel-like material is 380 meshes.
The preparation method of the environment-friendly composite early strength water reducer comprises the following steps: the components are uniformly mixed according to the proportion, then sodium hydroxide is added, the PH is adjusted to 7.3, and the mixture is stirred for 3.8 hours at the temperature of 58 ℃ to obtain the water-based paint.
Example 5
The environment-friendly composite early strength water reducing agent is characterized by comprising the following components in parts by weight: 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer 20 parts, hyperbranched polylysine 8 parts, sodium alginate 5 parts, celestite 7 parts, similar spar 3 parts, N- (3-triethoxysilylpropyl) glucamide 3 parts and water 40 parts.
The preparation method of the 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer comprises the following steps: adding 3- (1-naphthyl) acrylic acid, 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, 4-vinyl-2, 3-dihydrobenzofuran, alliin and azodiisobutyronitrile into dimethyl sulfoxide, stirring and reacting for 5 hours at the temperature of 80 ℃, cooling to room temperature, and removing dimethyl sulfoxide and micromolecular substances by rotary evaporation to obtain a 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer; the mass ratio of the 3- (1-naphthyl) acrylic acid to the 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt to the 4-vinyl-2, 3-dihydrobenzofuran to the alliin to the azodiisobutyronitrile to the dimethyl sulfoxide is 2:1:1:0.5:0.05: 20.
The particle size of the celestite is 300 meshes; the particle size of the spinel-like body is 400 meshes.
The preparation method of the environment-friendly composite early strength water reducer comprises the following steps: the components are uniformly mixed according to a proportion, then sodium hydroxide is added, the PH is adjusted to 7.5, and then the mixture is stirred for 4 hours at the temperature of 60 ℃.
Comparative example 1
The embodiment provides an environment-friendly composite early strength water reducing agent, the formula and the preparation method of which are basically the same as those of embodiment 1, except that hyperbranched polylysine and sodium alginate are not added.
Comparative example 2
The example provides an environment-friendly composite early strength water reducing agent, the formula and the preparation method of which are basically the same as those of the example 1, except that no celestite or similar spar is added.
Comparative example 3
This example provides an environment-friendly composite early strength water reducing agent, the formulation and preparation method of which are substantially the same as those of example 1, except that N- (3-triethoxysilylpropyl) glucamide is not added.
The environmental-friendly composite early strength water reducing agent described in examples 1-5 and comparative examples 1-3 was subjected to performance tests, and the test results are shown in Table 1. The performance test method is carried out by referring to JG/T223-2007, and the mixing amount of the water reducing agent is 0.1%.
As can be seen from Table 1, compared with the environment-friendly composite early strength water reducing agent of the comparative example, the environment-friendly composite early strength water reducing agent disclosed by the embodiment of the invention has better water reducing effect, higher compressive strength and no negative influence on the performance of a concrete body.
TABLE 1
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The environment-friendly composite early strength water reducing agent is characterized by comprising the following components in parts by weight: 15-20 parts of 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer, 4-8 parts of hyperbranched polylysine, 2-5 parts of sodium alginate, 4-7 parts of celestite, 1-3 parts of similar spar, 1-3 parts of N- (3-triethoxysilylpropyl) glucamide and 30-40 parts of water.
2. The environment-friendly composite early strength water reducing agent according to claim 1, wherein the preparation method of the 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer comprises the following steps: adding 3- (1-naphthyl) acrylic acid, 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, 4-vinyl-2, 3-dihydrobenzofuran, alliin and initiator into high boiling point solvent, stirring and reacting for 3-5 hours at 70-80 ℃, cooling to room temperature, and removing high boiling point solvent and micromolecular substances by rotary evaporation to obtain the 3- (1-naphthyl) acrylic acid/3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt/4-vinyl-2, 3-dihydrobenzofuran/alliin copolymer.
3. The environment-friendly composite early strength water reducing agent according to claim 2, wherein the mass ratio of the 3- (1-naphthyl) acrylic acid, the 3- [ N, N-dimethyl- [2- (2-methylpropane-2-enoyloxy) ethyl ] ammonium ] propane-1-sulfonic acid inner salt, the 4-vinyl-2, 3-dihydrobenzofuran, the alliin, the initiator and the high boiling point solvent is 2:1:1:0.5 (0.04-0.05): 14-20.
4. The environment-friendly composite early strength water reducer according to claim 2, wherein the initiator is at least one of azobisisobutyronitrile and azobisisoheptonitrile.
5. The environment-friendly composite early strength water reducer according to claim 2, wherein the high boiling point solvent is at least one of dimethylsulfoxide, N-dimethylformamide and N-methylpyrrolidone.
6. The environment-friendly composite early strength water reducer according to claim 1, wherein the particle size of the celestite is 100-300 mesh.
7. The environment-friendly composite early strength water reducer according to claim 1, wherein the particle size of the spinel-like material is 200-400 mesh.
8. The environment-friendly composite early strength water reducing agent according to any one of claims 1 to 7, wherein the preparation method of the environment-friendly composite early strength water reducing agent comprises the following steps: mixing the components uniformly according to a certain proportion, adding sodium hydroxide, regulating pH to 6.5-7.5, and stirring at 50-60 deg.C for 2-4 hr.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159147A (en) * | 2020-10-13 | 2021-01-01 | 潍坊兴乐建材有限公司 | Environment-friendly concrete antifreezing pumping aid and preparation method thereof |
| CN112408850A (en) * | 2020-11-17 | 2021-02-26 | 陈小龙 | Environment-friendly concrete retarder and preparation method thereof |
| CN117049813A (en) * | 2023-10-12 | 2023-11-14 | 莱芜市兆信新材料股份有限公司 | Gypsum water reducer and preparation method and application thereof |
-
2020
- 2020-06-01 CN CN202010486285.XA patent/CN111574105A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159147A (en) * | 2020-10-13 | 2021-01-01 | 潍坊兴乐建材有限公司 | Environment-friendly concrete antifreezing pumping aid and preparation method thereof |
| CN112408850A (en) * | 2020-11-17 | 2021-02-26 | 陈小龙 | Environment-friendly concrete retarder and preparation method thereof |
| CN117049813A (en) * | 2023-10-12 | 2023-11-14 | 莱芜市兆信新材料股份有限公司 | Gypsum water reducer and preparation method and application thereof |
| CN117049813B (en) * | 2023-10-12 | 2023-12-26 | 莱芜市兆信新材料股份有限公司 | Gypsum water reducer and preparation method and application thereof |
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Application publication date: 20200825 |