CN114920484B - Slurry-rich sand-reducing rate type polycarboxylate superplasticizer and preparation method thereof - Google Patents
Slurry-rich sand-reducing rate type polycarboxylate superplasticizer and preparation method thereof Download PDFInfo
- Publication number
- CN114920484B CN114920484B CN202210605141.0A CN202210605141A CN114920484B CN 114920484 B CN114920484 B CN 114920484B CN 202210605141 A CN202210605141 A CN 202210605141A CN 114920484 B CN114920484 B CN 114920484B
- Authority
- CN
- China
- Prior art keywords
- slurry
- component
- rich
- water reducer
- sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Colloid Chemistry (AREA)
Abstract
The invention discloses a rich slurry sand-reducing rate type polycarboxylate water reducer and a preparation method thereof, wherein the rich slurry sand-reducing rate type polycarboxylate water reducer comprises 0.05% -0.3% of air entraining component, 0.5% -3% of retarding component, 20% -40% of comprehensive rich slurry type polycarboxylate water reducer, 0.5% -3% of rich slurry component, 0.05% -0.1% of steady gas component, 0.5% -4% of auxiliary soft component and the balance of water, wherein the viscosity average molecular weight of the comprehensive rich slurry type polycarboxylate water reducer is 80000-150000, the mass concentration is 50%, the air entraining component is one or two of alpha-alkenyl sodium sulfonate, triterpenoid saponin or rosin thermal polymer, the reagent prepared by the polycarboxylate water reducer is placed into a reaction kettle after being prepared, the PH value of the reaction environment of the reaction reagent is regulated, so that the solvent for reaction can fully react under the environment which is most suitable for the self.
Description
Technical Field
The invention relates to the technical field of concrete additives, in particular to a slurry-rich sand-reducing rate type polycarboxylate superplasticizer and a preparation method thereof.
Background
The polycarboxylate water reducer is a high-performance water reducer, and is a cement dispersant in the application of cement concrete. The polycarboxylate water reducer is widely applied to projects such as highways, bridges, dams, tunnels, high-rise buildings and the like, and can be safely transported by trains and automobiles due to the performances of environmental protection, nonflammability and nonflammability.
Along with the gradual increase of the foundation strength, the usable natural river sand is gradually exhausted, and the machine-made sand is fully spread. At present, the machine-made sand has the defects of unreasonable grading, big two ends, small middle, large fineness modulus fluctuation, poor sand crushing grain type and the like. These defects are easy to cause the problems of loose concrete, no paste wrapping, easy bleeding during standing, large water-required fluctuation, non-compact system and the like. The risk of pipe blockage during pumping and the sensitivity of additives can be increased, the controllability of concrete is poor, the strength fluctuation is large, and the conversion strength of carbonization depth deepening rebound is low. Based on this, a common solution in mixing plants is to increase the amount of powder such as cement or to increase the sand rate marginally. Thus, the cost of the mixing plant can be increased, and the later cracking risk of the concrete can be increased. Therefore, the slurry-rich sand-reducing rate type polycarboxylate superplasticizer is prepared to solve the problem.
Chinese patent CN113321438A only adopts different air entraining and air entraining type polycarboxylate water reducing agents to improve workability and slurry content of concrete, but increasing air content can cause the strength of concrete to be reduced, and poor material adaptability easily causes the air entraining performance of concrete to be poor and workability to be poor.
Therefore, there is a need for an improved polycarboxylate water reducer production technology to solve the problem existing in the prior art.
Disclosure of Invention
The invention aims to provide a slurry-rich sand-reducing rate type polycarboxylate superplasticizer and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the rich pulp sand reduction rate type polycarboxylate water reducer comprises 0.05% -0.3% of air entraining component, 0.5% -3% of retarding component, 20% -40% of comprehensive rich pulp type polycarboxylate water reducer, 0.5% -3% of rich pulp component, 0.05% -0.1% of gas stabilizing component, 0.5% -4% of auxiliary flexible component and the balance of water, wherein clockwise non-contact uniform stirring is carried out on the rich pulp sand reduction rate type polycarboxylate water reducer in the preparation process;
the viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate superplasticizer is 80000-150000, the mass concentration is 50%, and the structural general formula is:
wherein b is c and e is f=0.1-0.5:1-2:2-3:1:0.2-0.5;
wherein R is 1 Is CH 2 、CH 2 CH 2 Or CH (CH) 2 CH 2 CH 2 CH 2 ，R 2 H, CH of a shape of H, CH 3 Or CH (CH) 2 CH 2 OH，R 3 Is H or CH 3 ，R 4 Is OCH 3 、OCH 2 CH 3 、OCH 2 CH 2 CH 3 Or OCH (optical wavelength) 2 CH 2 CH 2 CH 3 ，a = 10-35；
The pulp-rich component is one or two of polyglycerol-6, polyglycerol-10, glycerolyether-26 or byproduct polyglycerol;
the gas-stabilizing component is one or two of dodecyl dimethyl amine oxide, neutral nano silica hydrosol or triethanolamine;
the auxiliary softening component is one or two of sodium sulfate, polymeric ferric sulfate or polymeric aluminum sulfate.
Preferably, the bleed component is one or two of alpha-sodium alkenyl sulfonate, triterpenoid saponin or rosin thermopolymer.
Preferably, the retarding component is one or two of glucose, glycerol or mannitol.
Preferably, the air entraining component, the retarding component, the comprehensive slurry-rich polycarboxylate water reducer, the slurry-rich component, the gas-stabilizing component and the auxiliary flexible component adopt sodium hydroxide, calcium hydroxide, organic amine or aqueous solution thereof to adjust the pH value of the reaction environment in the reaction process.
Preferably, the preparation method of the slurry-rich sand-reducing rate type polycarboxylate superplasticizer comprises the following steps of:
firstly, taking materials for preparing the slurry-rich sand-reducing rate type polycarboxylate superplasticizer, and taking the materials according to a configuration proportion;
adding water, air entraining component alpha-sodium alkenyl sulfonate, triterpenoid saponin or rosin thermopolymer, retarder component glucose, glycerol or mannitol, comprehensive slurry-rich polycarboxylate water reducer, slurry-rich component polyglycerol-6, byproduct polyglycerol, dodecyl dimethyl amine oxide, triethanolamine, sodium sulfate and polyaluminium sulfate into a compound kettle;
and thirdly, clockwise stirring the added material at a constant speed in one direction, and stirring and dissolving to obtain the slurry-rich sand-reducing rate type polycarboxylate superplasticizer.
Compared with the prior art, the invention has the beneficial effects that:
(1) The slurry-rich sand-reducing rate type polycarboxylate water reducer is stirred at a constant speed in a clockwise non-contact manner in the preparation process, so that excessive gas is prevented from entering a reaction solvent in the process of fully contacting and reacting the materials;
the air content of the concrete can be kept stable in the working time by adopting the action of the air entraining-air stabilizing component system, so that the workability of the concrete is not deteriorated due to the fact that the air content of the concrete fluctuates greatly, and the strength of the concrete with good workability is improved;
(2) The slurry-rich component belongs to polyhydroxy compounds, has a very good water-retaining slurry-rich effect, can effectively infiltrate the surfaces of cement particles to enrich the slurry, reduces the sand rate by 3-5% on the premise of ensuring the workability of concrete, and can effectively improve the strength of the concrete and effectively reduce the dosage of concrete additives after reducing the sand rate, thereby reducing the cost of the concrete;
(3) The sulfate softening-assisting component can generate more hydration initial products in the cement hydration slurry, and the initial nanoscale products can provide crystal nuclei for concrete flow and further lock water improvement workability;
(4) The air entraining component, the retarding component, the comprehensive slurry-rich polycarboxylate water reducer, the slurry-rich component, the gas stabilizing component and the softening assisting component adopt sodium hydroxide, calcium hydroxide organic amine or aqueous solution thereof to adjust the pH value of the reaction environment in the reaction process, and the solvent for reaction can fully react in the environment most suitable for the solvent by adjusting the pH value of the reaction environment;
(5) The preparation method disclosed by the invention is simple, low in raw material cost and wide in source, has remarkable effects of enriching slurry and reducing sand rate and reducing the dosage of the additive, can ensure that the workability and stability of the concrete after reducing the sand rate by 3-5%, and is good in pumpability and high in strength.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a technical scheme that: the polycarboxylic acid water reducer comprises 0.05% -0.3% of air entraining component, 0.5% -3% of retarding component, 20% -40% of comprehensive pulp-rich polycarboxylic acid water reducer, 0.5% -3% of pulp-rich component, 0.05% -0.1% of gas stabilizing component, 0.5% -4% of softening assisting component and the balance of water, wherein the pulp-rich sand-reducing polycarboxylic acid water reducer is subjected to clockwise non-contact uniform stirring in the preparation process, so that excessive gas is prevented from entering a reaction solvent in the process of full contact reaction of materials.
The air entraining component adopted in the preparation of the slurry-rich sand-reducing rate type polycarboxylate superplasticizer is one or two of alpha-sodium alkenyl sulfonate, triterpenoid saponin or rosin thermal polymer, the retarding component is one or two of glucose, glycerol or mannitol, and the slurry-rich component is one or two of polyglycerol-6, polyglycerol-10, glycerol polyether-26 or byproduct polyglycerol.
The gas stabilizing component is one or two of dodecyl dimethyl amine oxide, neutral nano silica hydrosol or triethanolamine, and the auxiliary softening component is one or two of sodium sulfate, polymeric ferric sulfate or polymeric aluminum sulfate.
The viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate water reducer used in the comprehensive slurry-rich sand-reducing rate polycarboxylate water reducer is 80000-150000, the mass concentration is 50%, and the structural general formula is:
wherein b is c and e is f=0.1-0.5:1-2:2-3:1:0.2-0.5;
wherein R is 1 Is CH 2 、CH 2 CH 2 Or CH (CH) 2 CH 2 CH 2 CH 2 ，R 2 H, CH of a shape of H, CH 3 Or CH (CH) 2 CH 2 OH，R 3 Is H or CH 3 ，R 4 Is OCH 3 、OCH 2 CH 3 、OCH 2 CH 2 CH 3 Or OCH (optical wavelength) 2 CH 2 CH 2 CH 3 ，a = 10-35。
When the rich slurry sand-reducing rate type polycarboxylate water reducer is prepared, the materials for preparing the rich slurry sand-reducing rate type polycarboxylate water reducer are taken, the taken materials are taken according to the preparation proportion, water, alpha-alkenyl sodium sulfonate, rosin thermopolymer, glucose, mannitol, comprehensive rich slurry type polycarboxylate water reducer, polyglycerol-6, byproduct polyglycerol, dodecyl dimethyl amine oxide, triethanolamine, sodium sulfate and polyaluminium sulfate which are prepared according to the proportion are added into a compound kettle, and the rich slurry sand-reducing rate type polycarboxylate water reducer material which is subjected to reaction is subjected to clockwise non-contact uniform stirring according to one direction, so that the rich slurry sand-reducing rate type polycarboxylate water reducer is obtained after stirring until complete dissolution.
The air entraining component, the retarding component, the comprehensive slurry-rich polycarboxylate water reducer, the slurry-rich component, the gas stabilizing component and the softening assisting component adopt sodium hydroxide, calcium hydroxide organic amine or aqueous solution thereof to adjust the pH value of the reaction environment in the reaction process, and the solvent for reaction can fully react in the environment most suitable for the solvent by adjusting the pH value of the reaction environment.
Example 1
78.4% of water, 0.05% of alpha-sodium alkenyl sulfonate, 0.5% of glucose, 20% of comprehensive slurry-rich polycarboxylate water reducer, 0.5% of polyglycerol-6, 0.05% of dodecyl dimethyl amine oxide and 0.5% of sodium sulfate are added into a compound kettle, and the slurry-rich sand-reducing polycarboxylate water reducer with the number KRPC-1 is obtained after uniform non-contact stirring until the components are completely dissolved.
The viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate water reducer is 80070, the mass concentration is 50%, and the structural general formula of the water reducer is:
wherein b: c: e: f=0.1:1:2:1:0.2;
wherein R is 1 Is CH 2 ，R 2 Is H, R 3 Is H, R 4 Is OCH 3 ，a = 10。
Example 2
49.6% of water, 0.3% of triterpenoid saponin, 3% of glycerol, 40% of comprehensive slurry-rich polycarboxylate water reducer, 3% of polyglycerol-10, 0.1% of neutral nano silica hydrosol and 4% of polymeric ferric sulfate are added into a compound kettle, and the slurry-rich sand-reducing polycarboxylate water reducer with the number KRPC-2 is obtained after uniform non-contact stirring until the components are completely dissolved.
The viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate water reducer is 150500, the mass concentration is 50%, and the structural general formula of the water reducer is as follows:
wherein b: c: e: f=0.5:2:3:1:0.5;
wherein R is 1 Is CH 2 CH 2 ，R 2 Is CH 3 ，R 3 Is CH 3 ，R 4 Is OCH 2 CH 3 ，a =35。
Example 3
58.7% of water, 0.2% of rosin thermopolymer, 2% of mannitol, 35% of comprehensive slurry-rich polycarboxylate water reducer, 2% of glycerol polyether-26, 0.1% of triethanolamine and 2% of polyaluminium sulfate are added into a compound kettle, and the slurry-rich sand-reducing rate polycarboxylate water reducer, KRPC-3, is obtained after uniform non-contact stirring until the components are completely dissolved.
The viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate water reducer is 110000, the mass concentration is 50%, and the structural general formula of the water reducer is as follows:
wherein b is c and e is f=0.3:1.5:2.5:1:0.3;
wherein R is 1 Is CH 2 CH 2 CH 2 CH 2 ，R 2 Is CH 2 CH 2 OH，R 3 Is CH 3 ，R 4 Is OCH 2 CH 2 CH 3 ，a = 20。
Example 4
65.8% of water, 0.05% of alpha-sodium alkenyl sulfonate, 0.05% of triterpenoid saponin, 0.5% of glucose, 0.5% of glycerol, 30% of comprehensive slurry-rich polycarboxylate water reducer, 0.5% of polyglycerol-6, 1% of polyglycerol-10, 0.05% of dodecyl dimethyl amine oxide, 0.05% of neutral nano silica hydrosol, 0.5% of sodium sulfate and 1% of polymeric ferric sulfate are added into a compound kettle, and the slurry-rich sand-reducing rate polycarboxylate water reducer is obtained after uniform non-contact stirring until complete dissolution, and the KRP-4 is obtained.
The viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate water reducer is 90000, the mass concentration is 50%, and the structural general formula of the water reducer is as follows:
wherein b: c: e: f=0.4:1:2:1:0.2;
wherein R is 1 Is CH 2 CH 2 ，R 2 Is H, R 3 Is H, R 4 Is OCH 2 CH 2 CH 2 CH 3 ，a =35。
Example 5
53.25% of water, 0.05% of triterpenoid saponin, 0.1% of rosin thermopolymer, 0.5% of glycerol, 1.5% of mannitol, 40% of comprehensive slurry-rich polycarboxylate water reducer, 0.5% of polyglycerol-6, 2% of glycereth-26, 0.05% of neutral nano silica hydrosol, 0.05% of triethanolamine, 1% of polymeric ferric sulfate and 1% of polymeric aluminum sulfate are added into a compound kettle, and the slurry-rich sand-reducing rate polycarboxylate water reducer is obtained after uniform non-contact stirring until complete dissolution, and the KRP-5 is numbered.
The viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate water reducer is 110000, the mass concentration is 50%, and the structural general formula of the water reducer is as follows:
wherein b: c: e: f=0.4:2:3:1:0.4;
wherein R is 1 Is CH 2 CH 2 CH 2 CH 2 ，R 2 Is CH 2 CH 2 OH，R 3 Is CH 3 ，R 4 Is OCH 2 CH 2 CH 3 ，a = 16。
Example 6
Adding 65.42% of water, 0.1% of alpha-sodium alkenyl sulfonate, 0.1% of rosin thermopolymer, 0.5% of glucose, 0.5% of mannitol, 30% of comprehensive slurry-rich polycarboxylate water reducer, 1% of polyglycerol-6, 1% of byproduct polyglycerol, 0.05% of dodecyl dimethyl amine oxide, 0.03% of triethanolamine, 0.5% of sodium sulfate and 0.8% of polyaluminium sulfate into a compound kettle, and stirring at a constant speed in a non-contact manner until the components are completely dissolved to obtain the slurry-rich sand-reducing rate polycarboxylate water reducer, namely KRP-6.
The viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate water reducer is 120000, the mass concentration is 50%, and the structural general formula of the water reducer is as follows:
wherein b is c and e is f=0.4:1.5:2.5:1:0.4;
wherein R is 1 Is CH 2 CH 2 CH 2 CH 2 ，R 2 Is CH 2 CH 2 OH，R 3 Is CH 3 ，R 4 Is OCH 2 CH 2 CH 3 ，a = 19。
Example 7
58.35% of water, 0.05% of alpha-sodium alkenyl sulfonate, 3% of glycerol, 35% of comprehensive slurry-rich polycarboxylate water reducer, 0.5% of polyglycerol-6, 1% of byproduct polyglycerol, 0.1% of neutral nano silica hydrosol and 2% of polyaluminium sulfate are added into a compound kettle, and the slurry-rich sand-reducing polycarboxylate water reducer, KRPC-7, is obtained after uniform non-contact stirring until the components are completely dissolved.
The viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate water reducer is 90700, the mass concentration is 50%, and the structural general formula of the water reducer is as follows:
wherein b: c: e: f=0.4:2:3:1:0.5;
wherein R is 1 Is CH 2 CH 2 ，R 2 Is CH 2 CH 2 OH，R 3 Is CH 3 ，R 4 Is OCH 2 CH 2 CH 3 ，a = 17。
Example 8
62.15% of water, 0.3% of rosin thermal polymer, 3% of glucose, 30% of comprehensive slurry-rich polycarboxylate water reducer, 2% of polyglycerol-10, 0.5% of glycerolyether-26, 0.05% of dodecyl dimethyl amine oxide and 2% of polyaluminium sulfate are added into a compound kettle, and the slurry-rich sand-reducing polycarboxylate water reducer with the number KRPC-1 is obtained after uniform non-contact stirring until the components are completely dissolved.
Wherein the viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate superplasticizer is 120000, and the mass concentration is 50%. The structural general formula of the water reducer is as follows:
wherein b is c and e is f=0.3:1.5:2.6:1:0.4;
wherein R is 1 Is CH 2 CH 2 CH 2 CH 2 ，R 2 Is CH 2 CH 2 OH，R 3 Is CH 3 ，R 4 Is OCH 3 ，a = 25。
Example 9
70.2% of water, 0.2% of triterpenoid saponin, 1% of glucose, 25% of comprehensive slurry-rich polycarboxylate water reducer, 0.5% of polyglycerol-10, 2% of byproduct polyglycerol, 0.1% of neutral nano silica hydrosol and 1% of polyaluminium sulfate are added into a compound kettle, and the slurry-rich sand-reducing polycarboxylate water reducer, KRP-9, is obtained after uniform non-contact stirring until the components are completely dissolved.
Wherein the viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate superplasticizer is 140000, and the mass concentration is 50%. The structural general formula of the water reducer is as follows:
wherein b is c and e is f=0.3:1.5:2.5:1:0.4;
wherein R is 1 Is CH 2 CH 2 CH 2 CH 2 ，R 2 Is CH 2 CH 2 OH，R 3 Is CH 3 ，R 4 Is OCH 2 CH 2 CH，a = 30。
Example 10
60.4% of water, 0.05% of rosin thermopolymer, 0.5% of mannitol, 35% of comprehensive slurry-rich polycarboxylate water reducer, 1% of glycerol polyether-26, 1% of byproduct polyglycerol, 0.05% of dodecyl dimethyl amine oxide and 2% of polymeric ferric sulfate are added into a compound kettle. And stirring at a constant speed in a non-contact manner until the water is completely dissolved, and obtaining the slurry-rich sand-reducing rate type polycarboxylate superplasticizer, with the number KRPC-10.
Wherein the viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate superplasticizer is 140000, and the mass concentration is 50%. The structural general formula of the water reducer is as follows:
wherein b: c: e: f=0.5:2:3:1:0.5;
wherein R is 1 Is CH 2 CH 2 CH 2 CH 2 ，R 2 Is CH 2 CH 2 OH，R 3 Is CH 3 ，R 4 Is OCH 2 CH 2 CH 3 ，a = 15。
Comparative example 1
73.9% of water, 0.1% of liquid air entraining agent, 1% of sodium gluconate and 25% of ordinary water-reducing type polycarboxylic superplasticizer are added into a compound kettle to obtain an ordinary polycarboxylic pumping aid product SPC-1, wherein the ordinary polycarboxylic water reducer has the structure that:
wherein m: n=4:1
Comparative example 2
68.8% of water, 0.2% of liquid air entraining agent, 1% of white granulated sugar and 30% of ordinary water-reducing type polycarboxylic superplasticizer are added into a compound kettle to obtain an ordinary polycarboxylic pumping agent product SPC-2, wherein the ordinary polycarboxylic water reducer has the structure that:
wherein m: n=6:1
The implementation effect is as follows: the C30 concrete with the sand ratio of 45 percent is prepared from the following components: fly ash: mineral powder: sand: stone: water = 220:60:90:840:1025:165; the C30 concrete with the sand ratio of 42 percent is prepared from the following components: fly ash: mineral powder: sand: stone: water = 220:60:90:780:1082:165, wherein the cement is P.O42.5, the fly ash is II-grade ash, the mineral powder is S95 grade, the fineness modulus of sand is 2.8, and the stone is 5-20mm continuous grading. The blank sand rate is 45%, the comparative example sample is adopted for adaptation, the comparative sand rate is 42%, the example is adopted for adaptation, and the test is carried out to determine the doping amount of the external agent, the workability of concrete, the air content and the strength of each example and comparative example. The specific test results are shown in Table 1.
Table 1 concrete performance results for different water reducer samples
As can be seen from the data in Table 1, compared with the common polycarboxylate water reducer, the cement-rich sand-reducing rate polycarboxylate water reducer prepared by adopting the specific cement-rich raw material can ensure that the concrete has good workability, high concrete strength by 3-5MPa, stable air content without loss and about 0.5 percent of additive doping amount under the condition of reducing the sand rate, and can effectively reduce the comprehensive cost of the concrete.
The preparation method disclosed by the invention is simple, low in raw material cost and wide in source, has remarkable effects of enriching slurry and reducing sand rate and reducing the dosage of the additive, can ensure that the workability and stability of the concrete after reducing the sand rate by 3-5%, and is good in pumpability and high in strength.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A slurry-rich sand-reducing rate type polycarboxylate water reducer is characterized in that: the slurry-rich sand-reducing rate type polycarboxylate water reducer comprises 0.05-0.3% of air entraining component, 0.5-3% of retarding component, 20-40% of comprehensive slurry-rich polycarboxylate water reducer, 0.5-3% of slurry-rich component, 0.05-0.1% of gas-stabilizing component, 0.5-4% of softening component and the balance of water, wherein clockwise non-contact uniform stirring is carried out on the slurry-rich sand-reducing rate type polycarboxylate water reducer in the preparation process;
the viscosity average molecular weight of the comprehensive slurry-rich polycarboxylate superplasticizer is 80000-150000, the mass concentration is 50%, and the structural general formula is:
wherein b is c and e is f=0.1-0.5:1-2:2-3:1:0.2-0.5;
wherein R is 1 Is CH 2 、CH 2 CH 2 Or CH (CH) 2 CH 2 CH 2 CH 2 ，R 2 H, CH of a shape of H, CH 3 Or CH (CH) 2 CH 2 OH，R 3 Is H or CH 3 ，R 4 Is OCH 3 、OCH 2 CH 3 、OCH 2 CH 2 CH 3 Or OCH (optical wavelength) 2 CH 2 CH 2 CH 3 ，a = 10-35；
The pulp-rich component is one or two of polyglycerol-6, polyglycerol-10, glycerolyether-26 or byproduct polyglycerol;
the gas-stabilizing component is one or two of dodecyl dimethyl amine oxide, neutral nano silica hydrosol or triethanolamine;
the auxiliary softening component is one or two of sodium sulfate, polymeric ferric sulfate or polymeric aluminum sulfate.
2. The slurry-rich sand-reducing rate type polycarboxylate superplasticizer as defined in claim 1, wherein: the air entraining component is one or two of alpha-sodium alkenyl sulfonate, triterpenoid saponin or rosin thermopolymer.
3. The slurry-rich sand-reducing rate type polycarboxylate superplasticizer as defined in claim 1, wherein: the retarding component is one or two of glucose, glycerol or mannitol.
4. The slurry-rich sand-reducing rate type polycarboxylate superplasticizer as defined in claim 1, wherein: the air entraining component, the retarding component, the comprehensive slurry-rich polycarboxylate water reducer, the slurry-rich component, the gas stabilizing component and the auxiliary softening component adopt sodium hydroxide, calcium hydroxide, organic amine or aqueous solution thereof to adjust the pH value of the reaction environment in the reaction process.
5. The preparation method for realizing the slurry-rich sand-reducing rate type polycarboxylate superplasticizer disclosed by claim 1 comprises the following steps:
firstly, taking materials for preparing the slurry-rich sand-reducing rate type polycarboxylate superplasticizer, and taking the materials according to a configuration proportion;
adding water, air entraining component alpha-sodium alkenyl sulfonate, air entraining component rosin thermopolymer, retarding component glucose, retarding component mannitol, comprehensive slurry-rich polycarboxylate water reducer, polyglycerol-6, byproduct polyglycerol, dodecyl dimethyl amine oxide, triethanolamine, sodium sulfate and polyaluminium sulfate into a compound kettle in proportion;
and thirdly, clockwise stirring the added material at a constant speed in one direction, and stirring and dissolving to obtain the slurry-rich sand-reducing rate type polycarboxylate superplasticizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210605141.0A CN114920484B (en) | 2022-05-31 | 2022-05-31 | Slurry-rich sand-reducing rate type polycarboxylate superplasticizer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210605141.0A CN114920484B (en) | 2022-05-31 | 2022-05-31 | Slurry-rich sand-reducing rate type polycarboxylate superplasticizer and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114920484A CN114920484A (en) | 2022-08-19 |
| CN114920484B true CN114920484B (en) | 2023-06-09 |
Family
ID=82813146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210605141.0A Active CN114920484B (en) | 2022-05-31 | 2022-05-31 | Slurry-rich sand-reducing rate type polycarboxylate superplasticizer and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114920484B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978009A (en) * | 2020-08-31 | 2020-11-24 | 宁夏科润建材科技有限公司 | Highway concrete water reducing agent |
| CN113321438A (en) * | 2021-05-29 | 2021-08-31 | 石家庄市长安育才建材有限公司 | Slurry-rich concrete additive and preparation method thereof |
| CN114315209A (en) * | 2022-02-15 | 2022-04-12 | 北京盛大风华科技有限公司 | Preparation method of fluorocarbon-containing viscosity-reducing polycarboxylate superplasticizer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004175653A (en) * | 2002-10-01 | 2004-06-24 | Nippon Shokubai Co Ltd | Cement admixture |
| JP2007076971A (en) * | 2005-09-15 | 2007-03-29 | Nippon Shokubai Co Ltd | Admixture composition for hydraulic material |
| CN103980408B (en) * | 2014-05-28 | 2016-02-10 | 中国日用化学工业研究院 | Polyglycerine type poly carboxylic acid series water reducer and preparation method thereof |
| CN110054430B (en) * | 2019-04-04 | 2021-07-30 | 北京盛大风华科技有限公司 | Tackifying and strengthening type polycarboxylate water reducer for pervious concrete |
| CN110105503B (en) * | 2019-05-07 | 2021-07-30 | 湖南大学 | Viscosity-reducing type efficient water-reducing polycarboxylate superplasticizer and preparation method thereof |
-
2022
- 2022-05-31 CN CN202210605141.0A patent/CN114920484B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978009A (en) * | 2020-08-31 | 2020-11-24 | 宁夏科润建材科技有限公司 | Highway concrete water reducing agent |
| CN113321438A (en) * | 2021-05-29 | 2021-08-31 | 石家庄市长安育才建材有限公司 | Slurry-rich concrete additive and preparation method thereof |
| CN114315209A (en) * | 2022-02-15 | 2022-04-12 | 北京盛大风华科技有限公司 | Preparation method of fluorocarbon-containing viscosity-reducing polycarboxylate superplasticizer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114920484A (en) | 2022-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO831591L (en) | ADDITIVE FOR HYDRAULIC CEMENT MIXTURES. | |
| CN112028541B (en) | Concrete nano reinforcing modifier and preparation method thereof | |
| CN110255955B (en) | Alkali-free liquid accelerator and preparation method and application thereof | |
| WO2012155342A1 (en) | Process for preparing additive for cementitious materials, additive and mixture comprising additive | |
| CN111689713B (en) | Special additive for concrete of prefabricated part and preparation method thereof | |
| CN106565164A (en) | Modified high-sulfate-resistant corrosion-resistant concrete | |
| CN112358224A (en) | Concrete glue reducing agent and preparation method and application thereof | |
| CN107686301B (en) | Wet-mixed mortar and preparation method thereof | |
| CN109021179B (en) | Phosphonic acid-based polymer, preparation method thereof and phosphate mother liquor | |
| CN113526924A (en) | Special grouting material for offshore wind power suction type foundation and preparation method thereof | |
| CN114044856A (en) | Mud-blocking type polycarboxylate superplasticizer and preparation method thereof | |
| CN114920484B (en) | Slurry-rich sand-reducing rate type polycarboxylate superplasticizer and preparation method thereof | |
| CN109704684B (en) | Retarding type water-dispersion-resistant grouting material for implanted rock-socketed single pile | |
| CN107311509A (en) | A kind of wet mixing mortar setting time conditioning agent and preparation method and application | |
| CN114656224B (en) | Low-cementing-material self-compacting concrete and preparation method thereof | |
| CN112661436B (en) | Machine-made sand concrete bleeding inhibitor and application method thereof | |
| CN110171940B (en) | Coral sand admixture and preparation method and application thereof | |
| CN113620678A (en) | Grouting material and preparation method thereof | |
| CN115180915B (en) | High-performance concrete and preparation method thereof | |
| CN115286540B (en) | Preparation method of fresh concrete early strength agent and fresh concrete early strength agent | |
| CN116023062B (en) | Water-based synergist for concrete and preparation method thereof | |
| CN114804737B (en) | Cement-free grouting material for tunnel and preparation method thereof | |
| CN115286280B (en) | Cement reinforcing agent for cement mill and preparation method thereof | |
| CN114988729B (en) | Method for improving flexural strength of belite sulphoaluminate cement and application thereof | |
| CN117682787B (en) | Low-temperature-resistant polycarboxylate superplasticizer and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |