CN112707694B - Reinforcing steel bar sleeve grouting material for prefabricated part and preparation method thereof - Google Patents
Reinforcing steel bar sleeve grouting material for prefabricated part and preparation method thereof Download PDFInfo
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- CN112707694B CN112707694B CN201911349360.1A CN201911349360A CN112707694B CN 112707694 B CN112707694 B CN 112707694B CN 201911349360 A CN201911349360 A CN 201911349360A CN 112707694 B CN112707694 B CN 112707694B
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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
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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
- C04B2111/00017—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
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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
- 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
-
- 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
Abstract
The invention belongs to the field of prefabricated part building materials, and particularly relates to a reinforcing steel bar sleeve grouting material for a prefabricated part and a preparation method thereof. The reinforcing steel bar sleeve grouting material for the prefabricated part comprises the following components: 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; the polycarboxylate superplasticizer is a modified polyether polymer; the swelling agent is water-soluble polyurethane. The invention adopts water-soluble polyurethane as an expanding agent, has double performances of elastic water stopping and water stopping by water, can change the expansion rate by adjusting the water consumption, and meets different requirements of early expansion and later expansion; meanwhile, the shrinkage-reducing polycarboxylate superplasticizer adopted can achieve the purpose of reducing shrinkage in the presence of cement, mixed sand and glass powder; the toughening agent is added to treat the existing expansion joints and movable joints, and the construction performance is good.
Description
Technical Field
The invention belongs to the field of prefabricated part building materials, and particularly relates to a reinforcing steel bar sleeve grouting material for a prefabricated part and a preparation method 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 such as 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.
At present, quartz sand is mostly used as one of fine aggregates in grouting materials for reinforcing steel sleeves, in order to reduce cost, river sand and the like are used for replacing the quartz sand, for example, CN109020335A reinforcing steel sleeve grouting and preparation method is disclosed, the publication date is 12 months and 18 days in 2018, and part of the river sand is used for replacing part of the quartz sand, but the mud content in part of the river sand is high, the quality is poor, the strength and the temperature of concrete are affected, and the utilization of natural river sand also faces the problems of high mining difficulty, high purchasing cost, river sand resource shortage and the like, so that the practical application of the river sand is limited.
However, in the prior art, if molybdenum tailing sand is directly adopted as fine aggregate, the problems of insufficient strength, poor flowing and poor shrinkage reduction effect exist.
The grouting material for the steel sleeve is prepared by weighing dry powder, adding water and stirring, for example, CN108530006A is a grouting material for the steel sleeve for the assembled structure connection and a preparation method thereof, and the publication date is 2018, 09 and 14 days; CN108147776A A high-performance grouting material for connecting low-temperature steel bars and a preparation method thereof, wherein the publication date is 2018, 06 and 12, and the grouting material is prepared by weighing all the components and stirring the components by using a stirrer. All materials are directly weighed and stirred, and the defects of nonuniform material mixing, unstable performance and the like can exist.
Disclosure of Invention
In order to solve the problems of insufficient strength, poor flow and poor shrinkage reduction effect of the grouting material in the background art, the invention provides a reinforcing steel bar sleeve grouting material for a prefabricated part, which comprises the following components: 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;
wherein, the polycarboxylate superplasticizer modifies polyether polymer;
the swelling agent is water-soluble polyurethane.
On the basis of the technical scheme, the polycarboxylate water reducer modified polyether polymer is selected from one or two of an MPEG-AMPS (moving Picture experts group-acrylate copolymer) reduction type polycarboxylate water reducer with the molecular weight of 30000-40000 and the block ratio of polyethylene glycol monomethyl ether to 2-acrylamido-2-methylpropanesulfonic acid being 3-5: 1, an APEG-MAA reduction type polycarboxylate water reducer with the molecular weight of 40000-50000 and the block ratio of allyl polyoxyethylene ether to methacrylic acid being 4-6: 1, and a TPEG-MA reduction type polycarboxylate water reducer with the molecular weight of 50000-60000 and the block ratio of methallyl polyoxyethylene ether to methacrylamide being 4-5: 1.
On the basis of the technical scheme, further, in the mixed sand, the weight ratio of the machine-made sand to the molybdenum tailing sand is 1: 0.1-0.2.
On the basis of the technical scheme, further, in the mixed sand, the weight ratio of the machine-made sand to the molybdenum tailing sand is 1: 0.15.
On the basis of the technical scheme, the glass powder is waste glass powder with 100-200 meshes.
On the basis of the technical scheme, the waste glass powder is formed 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%.
On the basis of the technical scheme, the expanding agent is one of polyether dry powder type, polyester type and ether ester mixed polyurethane.
On the basis of the technical scheme, the thickening agent is cellulose ether.
On the basis of the technical scheme, the thickening agent is one of hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
On the basis of the technical scheme, the toughening agent is one of methyl methacrylate-butadiene-styrene polymer, acrylonitrile-butadiene-styrene polymer and chlorinated polyethylene.
The invention also provides a preparation method of the reinforcing steel bar sleeve dry powder 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 steel bar sleeve dry powder 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 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; meanwhile, when cement, mixed sand and glass powder exist, the shrinkage-reducing polycarboxylate superplasticizer adopted by the invention can reduce the surface tension and increase the viscosity under the alkaline condition along with the addition of water into the dry powder grouting material, and releases water on the premise of keeping the structure and the performance stable, thereby achieving the purpose of reducing shrinkage; 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 bar sleeve grouting material for the prefabricated part, the waste utilization is realized, the performance of the prepared dry powder grouting material for the reinforcing steel bar 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 also provides the following embodiments:
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 (8)
1. The utility model provides a steel sleeve grouting material for prefabricated part which characterized in that: the composition consists of the following components: 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;
wherein the polycarboxylate superplasticizer is a modified polyether polymer;
the swelling agent is water-soluble polyurethane;
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;
the polycarboxylate water reducer is a modified polyether polymer and is selected from one or two of an MPEG-AMPS (moving Picture experts group-acrylamide-styrene) shrinkage type polycarboxylate water reducer 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, an APEG-MAA (ammonium polyoxyethylene ether-maleic anhydride) shrinkage type polycarboxylate water reducer with the molecular weight of 40000-50000 and the block ratio of allyl polyoxyethylene ether to methacrylic acid of 4-6: 1 and a TPEG-MA shrinkage type polycarboxylate water reducer with the molecular weight of 50000-60000 and the block ratio of methallylpolyoxyethylene ether to methacrylamide of 4-5: 1;
in the mixed sand, the weight ratio of the machine-made sand to the molybdenum tailing sand is 1: 0.1-0.2.
2. The reinforcing steel bar sleeve grouting material for the prefabricated parts as claimed in claim 1, wherein: in the mixed sand, the weight ratio of the machine-made sand to the molybdenum tailing sand is 1: 0.15.
3. The reinforcing steel bar sleeve grouting material for the prefabricated parts as claimed in claim 1, wherein: the glass powder is waste glass powder of 100-200 meshes.
4. The reinforcing steel bar sleeve grouting material for the prefabricated parts as claimed in claim 3, wherein: 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 percent.
5. The reinforcing steel bar sleeve grouting material for the prefabricated parts as claimed in claim 1, wherein: the water-soluble polyurethane is one of polyether dry powder type, polyester type and ether ester mixed polyurethane.
6. The reinforcing steel bar sleeve grouting material for the prefabricated parts as claimed in claim 1, wherein: the thickening agent is cellulose ether.
7. The reinforcing steel bar sleeve grouting material for the prefabricated parts as claimed in claim 6, wherein: the thickening agent is one of hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
8. The reinforcing steel bar sleeve grouting material for the prefabricated parts as claimed in claim 1, wherein: the toughening agent is one of methyl methacrylate-butadiene-styrene polymer, acrylonitrile-butadiene-styrene polymer and chlorinated polyethylene.
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| 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 |
| CN201911349360.1A CN112707694B (en) | 2019-12-24 | 2019-12-24 | Reinforcing steel bar sleeve grouting material for prefabricated part and preparation method thereof |
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| CN109704659A (en) * | 2019-02-14 | 2019-05-03 | 苏州市姑苏新型建材有限公司 | A kind of reinforcing bar sleeve for connection grouting material |
| CN110482957A (en) * | 2019-09-05 | 2019-11-22 | 北京工业大学 | Bridge pier high fluidity superhigh intensity grouting material and preparation method thereof is connected based on assembled socket joint |
Also Published As
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| CN114702273B (en) | 2023-04-18 |
| CN112707694A (en) | 2021-04-27 |
| CN114702273A (en) | 2022-07-05 |
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