CN114702273A - Polycarboxylate superplasticizer for reinforcing steel bar sleeve grouting material for prefabricated part and grouting material thereof - Google Patents
Polycarboxylate superplasticizer for reinforcing steel bar sleeve grouting material for prefabricated part and grouting material thereof Download PDFInfo
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- CN114702273A CN114702273A CN202210314419.9A CN202210314419A CN114702273A CN 114702273 A CN114702273 A CN 114702273A CN 202210314419 A CN202210314419 A CN 202210314419A CN 114702273 A CN114702273 A CN 114702273A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00706—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like around pipelines or the like
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the field of prefabricated part building materials, and particularly relates to a polycarboxylic acid water reducing agent for a reinforcing steel bar sleeve grouting material for a prefabricated part and a grouting material thereof. The polycarboxylate superplasticizer for the reinforcing steel bar sleeve grouting material for the prefabricated part is a modified polyether polymer and consists of two of an MPEG-AMPS reduction type polycarboxylate superplasticizer, a molecular weight APEG-MAA reduction type polycarboxylate superplasticizer and a TPEG-MA reduction type polycarboxylate superplasticizer. The shrinkage-reducing polycarboxylate superplasticizer adopted by the invention can achieve the purpose of reducing shrinkage in the presence of cement, mixed sand and glass powder; the toughening agent is added, so that the expansion joint and the movable joint can be treated, and the construction performance is good.
Description
The application is a divisional application with the application number of CN201911349360.1 and the application date of 2019, 12 and 24, and relates to a reinforcement sleeve grouting material for prefabricated parts and a preparation method thereof.
Technical Field
The invention belongs to the field of prefabricated part building materials, and particularly relates to a polycarboxylic acid water reducing agent for a reinforcing steel bar sleeve grouting material for a prefabricated part and a grouting material thereof.
Background
With the idea of green environmental protection, people feel more and more keen, and the application of green building materials and green buildings is more and more extensive for the building industry. The steel bar sleeve grouting connection technology is used as a main means for green development of buildings and relates to various fields of civil engineering, road and bridge, underground engineering, ocean engineering, nuclear power engineering and the like. The grouting connection technology adopts a mode of factory prefabricated parts and field connection, so that the complicated construction procedures are reduced, energy is saved, emission is reduced, and the environment is protected. The quality of prefabricated component can be guaranteed in the mill prefabrication, and the safety and stability requirement of whole structure is just to a great extent just depending on being connected between reinforcing bar and the sleeve, and modern construction requires more and more high, just also requires sleeve grout material's performance more and more excellent.
In recent years, the research on the grouting material for the reinforcement sleeve of the prefabricated part is more and more, and according to the specification 'grouting material for reinforcement sleeve connection' in China, the grouting material for the reinforcement sleeve is a material which is prepared by adding a proper amount of fine aggregate and an additive into a cement-based material and adding water and stirring, and has excellent fluidity, early strength, high strength, micro-expansion and other properties. The cement-based grouting material is the most widely applied grouting material in the grouting engineering at present. At present, domestic grouting materials generally comprise cementing components, superplasticized components, preferred high-strength micro-aggregates and the like, but the performance and the cost of the grouting materials become bottlenecks influencing the development of the grouting materials. Particularly, the performance and the cost of the water reducing agent are greatly influenced, and how to improve the performance and the cost of the water reducing agent through improving the water reducing agent is an important problem to be solved urgently in the prior art.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a polycarboxylate superplasticizer for a reinforcing steel bar sleeve grouting material for a prefabricated part, wherein the polycarboxylate superplasticizer is a modified polyether polymer and is selected from two of an MPEG-AMPS (moving Picture experts group-Amps) reduction polycarboxylate superplasticizer, an APEG-MAA reduction polycarboxylate superplasticizer and a TPEG-MA reduction polycarboxylate superplasticizer.
In one embodiment, the molecular weight of the MPEG-AMPS reduction type polycarboxylate superplasticizer is 30000-40000, and the block ratio of the polyethylene glycol monomethyl ether to the 2-acrylamido-2-methylpropanesulfonic acid is 3-5: 1.
In one embodiment, the APEG-MAA reduction type polycarboxylate superplasticizer has a molecular weight of 40000-50000 and a ratio of allyl polyoxyethylene ether to methacrylic acid blocks of 4-6: 1.
In one embodiment, the molecular weight of the TPEG-MA reduction type polycarboxylate superplasticizer is 50000-60000, and the block ratio of methyl allyl polyoxyethylene ether to methacrylamide is 4-5: 1.
The invention also provides a reinforcing steel bar sleeve grouting material for the prefabricated part, which consists of the following components in percentage by weight: 70-100 parts of cement, 75-100 parts of mixed sand, 20-30 parts of glass powder, 1-3 parts of an expanding agent, 1-3 parts of a thickening agent, 1-5 parts of a polycarboxylic acid water reducing agent and 1-3 parts of a toughening agent in any one technical scheme; the mixed sand is the mixed sand of machine-made sand and molybdenum tailing sand, and the particle size of the mixed sand is less than or equal to 2 mm.
In one embodiment, the weight ratio of the machine-made sand to the molybdenum tailings sand in the mixed sand is 1: 0.1-0.2.
In one embodiment, the weight ratio of the machine sand to the molybdenum tailings sand in the mixed sand is 1: 0.15.
In one embodiment, the glass powder is waste glass powder with 100-200 meshes.
In one embodiment, the waste glass powder is prepared by crushing and grinding waste beer bottles, waste glass plates and waste beverage bottles, and the content of silicon dioxide is more than or equal to 80%.
In one embodiment, the swelling agent is a water soluble polyurethane.
In one embodiment, the expanding agent is one of polyether dry powder type polyurethane, polyester type polyurethane and ether ester mixed polyurethane.
In one embodiment, the thickening agent is a cellulose ether.
In one embodiment, the thickener is one of hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
In one embodiment, the toughening agent is one of methyl methacrylate-butadiene-styrene polymer, acrylonitrile-butadiene-styrene polymer, and chlorinated polyethylene.
The invention also provides a using method of the polycarboxylic acid water reducing agent for the reinforcing steel bar sleeve grouting material for the prefabricated part, which comprises the following steps:
step a, weighing the components in parts by weight;
b, dissolving the expanding agent, the thickening agent and the toughening agent in water at the temperature of 20-40 ℃ in a reaction vessel, and stirring for 10-20 min to uniformly mix the materials;
and c, under the condition of continuous stirring, adding the mixed sand and the glass powder into the material prepared in the step b, adding the mixed sand and the glass powder into the material a little for multiple times, and uniformly stirring for 20-30 min.
Compared with the prior art, the polycarboxylate superplasticizer for the reinforcing steel bar sleeve grouting material for the prefabricated part, provided by the invention, relates to the following technical principles and beneficial effects: when cement, mixed sand and glass powder exist, the adopted shrinkage-reducing polycarboxylate superplasticizer can reduce surface tension and increase viscosity under an alkaline condition along with the addition of water into the dry powder grouting material, and releases water on the premise of keeping stable structure and performance, thereby achieving the purpose of reducing shrinkage.
Compared with the prior art, the reinforcing steel bar sleeve grouting material for the prefabricated part provided by the invention relates to the following technical principles and beneficial effects: the water-soluble polyurethane is adopted as an expanding agent, expands when meeting water, has the double performances of elastic water stopping and water stopping by water, has larger volume expansion rate, can change the expansion rate by adjusting the water consumption, and meets different requirements of early expansion and later expansion; the toughening agent is added, so that the weakness of brittleness of the cement-based grouting material is reduced, and the expansion joint and the movable joint can be treated.
The invention uses the molybdenum tailing sand with smaller fineness modulus and the machine-made sand with larger fineness modulus to be combined, so that the mixed sand meets the requirement of gradation, the good water consumption is kept, the good strength is kept, the filling effect of the mixed sand and the volcanic ash effect of the glass powder ensure that the prepared dry powder grouting material for the steel sleeve is compact and has obvious reinforcing effect, and the mechanical property of the dry powder grouting material is improved.
In the preferred scheme, the molybdenum tailing sand and the waste glass powder are used as raw materials for preparing the reinforcing steel sleeve grouting material for the prefabricated part, the waste is utilized, the performance of the prepared dry powder grouting material for the reinforcing steel sleeve can meet the requirement, the reasonable utilization of resources is facilitated, and the requirement of sustainable development is met.
According to the preparation method provided by the invention, the prepared grouting material is more uniform and more stable in performance through the specific matching of the preparation steps and the process sequence.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will clearly and completely describe the embodiments of the present invention, and obviously, the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a polycarboxylate superplasticizer for a reinforcing steel bar sleeve grouting material for a prefabricated part, which is a modified polyether polymer and is selected from two of an MPEG-AMPS (moving Picture experts group-amplified polymer) reduction polycarboxylate superplasticizer, an APEG-MAA reduction polycarboxylate superplasticizer and a TPEG-MA reduction polycarboxylate superplasticizer.
Specifically, the polycarboxylate water reducer for the reinforcement sleeve grouting material for the prefabricated part can adopt an MPEG-AMPS reduction type polycarboxylate water reducer, an APEG-MAA reduction type polycarboxylate water reducer, a TPEG-MA reduction type polycarboxylate water reducer, an MPEG-AMPS reduction type polycarboxylate water reducer, or an APEG-MAA reduction type polycarboxylate water reducer and a TPEG-MA reduction type polycarboxylate water reducer.
In one embodiment, the molecular weight of the MPEG-AMPS reduction type polycarboxylate superplasticizer is 30000-40000, and the block ratio of the polyethylene glycol monomethyl ether to the 2-acrylamido-2-methylpropanesulfonic acid is 3-5: 1.
In one embodiment, the APEG-MAA reduction type polycarboxylate superplasticizer has a molecular weight of 40000-50000 and a ratio of allyl polyoxyethylene ether to methacrylic acid blocks of 4-6: 1.
In one embodiment, the molecular weight of the TPEG-MA reduction type polycarboxylate superplasticizer is 50000-60000, and the block ratio of methyl allyl polyoxyethylene ether to methacrylamide is 4-5: 1.
Compared with the prior art, the polycarboxylate superplasticizer for the reinforcing steel bar sleeve grouting material for the prefabricated part, provided by the invention, relates to the following technical principles and beneficial effects: when cement, mixed sand and glass powder exist, the adopted shrinkage-reducing polycarboxylate superplasticizer can reduce surface tension and increase viscosity under an alkaline condition along with the addition of water into the dry powder grouting material, and releases water on the premise of keeping stable structure and performance, thereby achieving the purpose of reducing shrinkage.
Specifically, the shrinkage-reducing polycarboxylic acid water reducing agent adopted by the invention is selected from MPEG-AMPS shrinkage-reducing polycarboxylic acid water reducing agents (namely, groups which contain a large amount of amide groups, COOH groups and the like, have strong water absorption and are easy to form a hydrogen bond network) with the molecular weight of 30000-40000 and the block ratio of polyethylene glycol monomethyl ether to 2-acrylamido-2-methylpropanesulfonic acid of 3-5: 1, two of APEG-MAA reduction type polycarboxylate water reducing agents (containing a large amount of strongly water-absorbing-COOH groups) with the molecular weight of 40000-50000 and the block ratio of allyl polyoxyethylene ether to methacrylic acid of 4-6: 1 and TPEG-MA reduction type polycarboxylate water reducing agents (containing a large amount of strongly water-absorbing groups, groups with the H-COOH groups and the like and easily forming a hydrogen bond network) with the molecular weight of 50000-60000 and the block ratio of the methyl allyl polyoxyethylene ether to the methacrylamide of 4-5: 1.
Since a hydrogen bond can be formed between C ═ O of an amide group and N — H on another amide group, and also between N-H and N-H, a hydrogen bond can be formed with each other, thus, in comparison to C ═ O, which can only form hydrogen bonds with OH on another-COOH group, the amide groups tend to form dense intermolecular hydrogen bonds between themselves, combining the water absorption of-COOH and amide groups themselves, water is not only held in the hydrogen bonding network by-COOH and amide groups, but also the mutual attraction between the amide groups further expands the hydrogen bond network and enhances the bond energy of the hydrogen bond, thereby leading the water retention effect to be further improved, and the concentration of water in the hydrogen bond network is further improved due to the enlargement of the hydrogen bond network, this is because the more hydrogen bonds in the hydrogen bond network, the stronger the covalent ability between hydrogen bonds, the more stable the covalent network formed, and the less likely the water molecule will be separated from the hydrogen bond network by external force.
Therefore, the shrinkage-reducing polycarboxylate superplasticizer adopted by the invention has extremely strong water absorption capacity (contains a large amount of water-absorbing-COOH groups) and is easy to form a hydrogen bond network with water to retain water, so that the shrinkage-reducing polycarboxylate superplasticizer has extremely strong water retention capacity and excellent shrinkage-reducing effect, and on the basis of the principle, the amide groups are hydrophilic groups, so that water in capillaries formed by drying is not easy to lose in the drying process of the grouting material, and the shrinkage caused by meniscus formed by water loss is not easy to occur.
The invention also provides a reinforcing steel bar sleeve grouting material for the prefabricated part, which consists of the following components in percentage by weight: 70-100 parts of cement, 75-100 parts of mixed sand, 20-30 parts of glass powder, 1-3 parts of an expanding agent, 1-3 parts of a thickening agent, 1-5 parts of a polycarboxylic acid water reducing agent and 1-3 parts of a toughening agent in any technical scheme; the mixed sand is the mixed sand of machine-made sand and molybdenum tailing sand, and the particle size of the mixed sand is less than or equal to 2 mm.
In one embodiment, the weight ratio of the machine-made sand to the molybdenum tailings sand in the mixed sand is 1: 0.1-0.2.
In one embodiment, the weight ratio of the machine sand to the molybdenum tailings sand in the mixed sand is 1: 0.15.
In one embodiment, the glass powder is waste glass powder with 100-200 meshes.
In one embodiment, the waste glass powder is prepared by crushing and grinding waste beer bottles, waste glass plates and waste beverage bottles, and the content of silicon dioxide is more than or equal to 80%.
In one embodiment, the swelling agent is a water soluble polyurethane.
In one embodiment, the expanding agent is one of polyether dry powder type polyurethane, polyester type polyurethane and ether ester mixed polyurethane.
In one embodiment, the thickening agent is a cellulose ether.
In one embodiment, the thickener is one of hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
In one embodiment, the toughening agent is one of methyl methacrylate-butadiene-styrene polymer, acrylonitrile-butadiene-styrene polymer, and chlorinated polyethylene.
Compared with the prior art, the reinforcing steel bar sleeve grouting material for the prefabricated part provided by the invention relates to the following technical principles and beneficial effects: by adopting the shrinkage-reducing polycarboxylate superplasticizer provided by the invention, when cement, mixed sand and glass powder exist, along with the addition of water into the dry powder grouting material, the surface tension can be reduced and the viscosity can be increased under an alkaline condition, and on the premise of keeping the structure and the performance stable, the water is released, so that the purpose of reducing shrinkage is achieved.
Furthermore, the reinforcing steel bar sleeve grouting material for the prefabricated part provided by the invention adopts water-soluble polyurethane as an expanding agent, is expanded when meeting water, has double performances of elastic water stopping and water stopping by water, has a larger volume expansion rate, can change the expansion rate by adjusting the water consumption, and meets different requirements of early expansion and later expansion; the toughening agent is added, so that the weakness of brittleness of the cement-based grouting material is reduced, and the expansion joint and the movable joint can be treated.
The invention uses the molybdenum tailing sand with smaller fineness modulus and the machine-made sand with larger fineness modulus to be combined, so that the mixed sand meets the requirement of gradation, the good water consumption is kept, the good strength is kept, the filling effect of the mixed sand and the volcanic ash effect of the glass powder ensure that the prepared dry powder grouting material for the steel sleeve is compact and has obvious reinforcing effect, and the mechanical property of the dry powder grouting material is improved.
The invention takes the molybdenum tailing sand and the waste glass powder as raw materials for preparing the reinforcing steel bar sleeve grouting material for the prefabricated part, belongs to waste utilization, and the prepared dry powder grouting material for the reinforcing steel bar sleeve can meet the requirements on performance, is favorable for reasonable utilization of resources and meets the requirements on sustainable development.
The invention also provides a using method of the polycarboxylic acid water reducing agent for the reinforcing steel bar sleeve grouting material for the prefabricated part, which comprises the following steps:
step a, weighing the components in parts by weight;
b, dissolving the expanding agent, the thickening agent and the toughening agent in water at the temperature of 20-40 ℃ in a reaction vessel, and stirring for 10-20 min to uniformly mix the materials;
and c, under the condition of continuous stirring, adding the mixed sand and the glass powder into the material prepared in the step b, adding the mixed sand and the glass powder into the material a little for multiple times, and uniformly stirring for 20-30 min.
According to the preparation method provided by the invention, the prepared grouting material is more uniform and more stable in performance through the specific matching of the preparation steps and the process sequence.
The invention also provides the following application examples of the polycarboxylate superplasticizer:
example 1
Weighing 1 part of water-soluble polyether polyurethane, 1 part of hydroxyethyl methyl cellulose ether and 1 part of methyl methacrylate-butadiene-styrene polymer, dissolving the water-soluble polyether polyurethane, the hydroxyethyl methyl cellulose ether and the methyl methacrylate-butadiene-styrene polymer in warm water at the temperature of 20 ℃ in a reaction container, stirring for 20min, continuously stirring, adding 63 parts of machine-made sand, 7 parts of molybdenum tailing sand and 20 parts of 100-mesh beer bottle grinding fine powder for a few times, uniformly stirring for 20min, then adding 70 parts of cement, an MPEG-AMPS (moving Picture experts group copolymer) -based polycarboxylic acid water reducer with the molecular weight of 30000 and the block ratio of polyethylene glycol monomethyl ether to 2-acrylamido-2-methylpropanesulfonic acid of 4:1, and stirring for 15min to obtain the reinforcing steel bar sleeve dry powder grouting material for the prefabricated member.
Example 2
Weighing 2 parts of water-soluble polyester polyurethane, 2 parts of hydroxypropyl methyl cellulose ether and 2 parts of acrylonitrile-butadiene-styrene polymer, dissolving the water-soluble polyester polyurethane, the hydroxypropyl methyl cellulose ether and the acrylonitrile-butadiene-styrene polymer in warm water at the temperature of 30 ℃ in a reaction container, stirring for 15min, continuously stirring, adding 68 parts of machine-made sand, 12 parts of molybdenum tailing sand and 25 parts of 150-mesh waste glass grinding powder for a plurality of times in a small amount, uniformly stirring for 25min, then adding 80 parts of cement and an APEG-MAA shrinkage type polycarboxylic acid water reducing agent with the molecular weight of 40000 and the block ratio of allyl polyoxyethylene ether to methacrylic acid of 5:1, and stirring for 15min to obtain the reinforcing steel bar sleeve dry powder grouting material for the prefabricated part.
Example 3
Weighing 2 parts of water-soluble polyester polyurethane, 2 parts of hydroxypropyl methyl cellulose ether and 2 parts of acrylonitrile-butadiene-styrene polymer, dissolving the water-soluble polyester polyurethane, the hydroxypropyl methyl cellulose ether and the acrylonitrile-butadiene-styrene polymer in warm water at the temperature of 25 ℃ in a reaction container, stirring for 20min, continuously stirring, adding 68 parts of machine-made sand, 12 parts of molybdenum tailing sand and 25 parts of 150-mesh waste glass grinding powder for a few times, uniformly stirring for 20min, then adding 80 parts of cement, a TPEG-MA shrinkage-reduction type polycarboxylic acid water reducing agent with the molecular weight of 50000 and the block ratio of methyl allyl polyoxyethylene ether to methacrylamide of 5:1, and stirring for 20min to obtain the reinforcing steel bar sleeve dry powder grouting material for the prefabricated part.
Example 4
Weighing 3 parts of water-soluble polyester, 3 parts of polyether mixed polyurethane, 3 parts of hydroxypropyl methyl cellulose ether and 3 parts of chlorinated polyethylene, dissolving the water-soluble polyester, the polyether mixed polyurethane, the hydroxypropyl methyl cellulose ether and the chlorinated polyethylene in warm water at the temperature of 40 ℃ in a reaction container, stirring for 100min, continuously stirring, adding 80 parts of machine-made sand, 20 parts of molybdenum tailing sand and 30 parts of 200-mesh waste beverage bottle grinding powder for a few times, uniformly stirring for 20min, then adding 100 parts of cement and a TPEG-MA shrinkage type polycarboxylic acid water reducing agent with the molecular weight of 60000 and the block ratio of methyl allyl polyoxyethylene ether to methacrylamide of 4:1, and stirring for 20min to obtain the reinforcing steel bar sleeve dry powder grouting material for the prefabricated part.
Comparative example
Weighing 80 parts of ordinary portland cement, 90 parts of quartz sand, 2 parts of an expanding agent and 4 parts of a standard high-performance water reducing agent by weight, and stirring in a mortar stirrer for 20min to obtain the reinforcing steel bar sleeve dry powder grouting material for the prefabricated part.
The dry powder grouting materials prepared in the above examples and comparative examples are subjected to performance test according to the test method in JG/T408-2013 sleeve grouting material for steel bar connection according to the mass ratio of powder to water of 1:0.12, and specific test data are shown in Table 1 below.
TABLE 1
The comparison shows that the shrinkage-reducing polycarboxylic acid water reducing agent, the water-soluble polyurethane expanding agent and the composite sand are added, so that the problem of high cost is solved, the purposes of improving the mechanical property and the fluidity and reducing the shrinkage can be achieved under the condition that the molybdenum tailing sand is used as the fine aggregate, and the shrinkage-reducing polycarboxylic acid water reducing agent has an obvious effect.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a polycarboxylate water reducing agent that is used for steel sleeve grouting material for prefabricated component which characterized in that: the polycarboxylate superplasticizer is a modified polyether polymer and is selected from two of MPEG-AMPS reduction type polycarboxylate superplasticizers, APEG-MAA reduction type polycarboxylate superplasticizers and TPEG-MA reduction type polycarboxylate superplasticizers.
2. The polycarboxylate superplasticizer for the steel bar sleeve grouting material for the prefabricated parts as claimed in claim 1, wherein: the molecular weight of the MPEG-AMPS reduction type polycarboxylate superplasticizer is 30000-40000, and the block ratio of polyethylene glycol monomethyl ether to 2-acrylamido-2-methylpropanesulfonic acid is 3-5: 1.
3. The polycarboxylate superplasticizer for the steel bar sleeve grouting material for the prefabricated parts as claimed in claim 1, wherein: the molecular weight of the APEG-MAA reduction type polycarboxylate superplasticizer is 40000-50000, and the ratio of allyl polyoxyethylene ether to methacrylic acid block is 4-6: 1.
4. The polycarboxylate superplasticizer for the steel bar sleeve grouting material for the prefabricated parts as claimed in claim 1, wherein: the molecular weight of the TPEG-MA reduction type polycarboxylate superplasticizer is 50000-60000, and the block ratio of methyl allyl polyoxyethylene ether to methacrylamide is 4-5: 1.
5. The utility model provides a steel sleeve grouting material for prefabricated part which characterized in that: the concrete water reducer comprises, by weight, 70-100 parts of cement, 75-100 parts of mixed sand, 20-30 parts of glass powder, 1-3 parts of an expanding agent, 1-3 parts of a thickening agent, 1-5 parts of a polycarboxylic acid water reducer as defined in any one of claims 1-4, and 1-3 parts of a toughening agent;
the mixed sand is the mixed sand of machine-made sand and molybdenum tailing sand, and the particle size of the mixed sand is less than or equal to 2 mm.
6. The reinforcing steel bar sleeve grouting material for prefabricated parts according to claim 5, wherein: the glass powder is prepared by crushing and grinding waste beer bottles, waste glass plates and waste beverage bottles, and the content of silicon dioxide is more than or equal to 80 percent.
7. The reinforcing steel bar sleeve grouting material for prefabricated parts according to claim 5, wherein: the expanding agent is water-soluble polyurethane, and the water-soluble polyurethane is one of polyether dry powder type polyurethane, polyester type polyurethane and ether ester mixed polyurethane.
8. The reinforcing steel bar sleeve grouting material for prefabricated parts according to claim 5, wherein: the thickening agent is cellulose ether.
9. The reinforcing steel bar sleeve grouting material for prefabricated parts according to claim 5, wherein: the thickening agent is one of hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
10. The reinforcing steel bar sleeve grouting material for prefabricated parts according to claim 5, wherein: the toughening agent is one of methyl methacrylate-butadiene-styrene polymer, acrylonitrile-butadiene-styrene polymer and chlorinated polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210314419.9A CN114702273B (en) | 2019-12-24 | 2019-12-24 | Polycarboxylate superplasticizer for reinforcing steel bar sleeve grouting material for prefabricated part and grouting material thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210314419.9A CN114702273B (en) | 2019-12-24 | 2019-12-24 | Polycarboxylate superplasticizer for reinforcing steel bar sleeve grouting material for prefabricated part and grouting material thereof |
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| CN112707694A (en) | 2021-04-27 |
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