CN112707683B - Sleeve grouting material for prefabricated part and preparation method thereof - Google Patents
Sleeve grouting material for prefabricated part and preparation method thereof Download PDFInfo
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- CN112707683B CN112707683B CN201911349395.5A CN201911349395A CN112707683B CN 112707683 B CN112707683 B CN 112707683B CN 201911349395 A CN201911349395 A CN 201911349395A CN 112707683 B CN112707683 B CN 112707683B
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2682—Halogen containing polymers, e.g. PVC
-
- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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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
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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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention belongs to the field of prefabricated part building materials, and particularly relates to a sleeve grouting material for a prefabricated part and a preparation method thereof. The grouting material is prepared by mixing dry powder of sleeve grouting material for the prefabricated part, water and a polycarboxylic acid water reducing agent; the grouting material dry powder 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 and 1-3 parts of a toughening agent; the mass ratio of the sleeve grouting material dry powder for the prefabricated part to water is 1: 0.1-0.15; the polycarboxylate superplasticizer is a comprehensive shrinkage polycarboxylate superplasticizer, the mixing amount is 2-3%, and the polycarboxylate superplasticizer has defoaming and low hydration heat effects. The comprehensive shrinkage-reducing polycarboxylate superplasticizer introduced by the invention can effectively reduce the influence of bubbles in the use process of the polycarboxylate superplasticizer, reduce the hydration heat of cement, reduce the shrinkage of the sleeve grouting material in the use process of a prefabricated part, and is beneficial to the popularization and the use of the prefabricated part in a large scale.
Description
Technical Field
The invention relates to the field of prefabricated part building materials, in particular to a 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 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.
The grouting material used in the market at present needs additive components with more components, for example, CN106830817A (CN: 06, 13 days in 2017), prefabricated floor slab grouting material with prefabricated concrete structure has 22 different components, and more components are unusual chemical components, so that raw materials for preparing the grouting material are not easy to obtain and have low practicability; in order to reduce the problems that the grouting material is affected by bubbles generated in the using process and is not easy to control in the cement hydration process, the grouting material used in the market is mostly solved by adding a defoaming agent, an antifoaming agent, a retarder and the like, and the addition of the auxiliary agent can cause low flowing property and inconvenience in construction in engineering application.
The grouting material for the reinforcement sleeve is prepared by weighing dry powder, adding water and stirring, for example, CN108530006A is a grouting material for the reinforcement sleeve for the assembly type structure connection and a preparation method thereof, the publication date is 09 and 14 days in 2018; 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 problem of poor fluidity of the grouting material in the use process in the background art, the invention provides a sleeve grouting material for a prefabricated part, which is prepared by mixing dry powder of the sleeve grouting material for the prefabricated part, water and a polycarboxylic acid water reducing agent; the sleeve grouting material dry powder 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 and 1-3 parts of a toughening agent; wherein the mass ratio of the sleeve grouting material dry powder for the prefabricated part to water is 1: 0.1-0.15; the polycarboxylate superplasticizer is a comprehensive shrinkage-reducing polycarboxylate superplasticizer, the mixing amount is 2% -3%, and the polycarboxylate superplasticizer has defoaming and low hydration heat effects.
On the basis of the scheme, the polycarboxylate superplasticizer is a comprehensive reduction polycarboxylate superplasticizer, the molecular weight of the polycarboxylate superplasticizer is 30000-50000, the water reduction rate is more than or equal to 30%, and the structural formula is as follows:
wherein R is1is-CH3or-CH2CH3，R2is-CH3，R3is-CF3，R4is-H or-CH3，R5Is an alkyl group of 1 to 5, M1is-H or alkyl H, M2Na or K, wherein a and b are positive integers, and a is 1-20, and b is 1-50.
On the basis of the scheme, the mixed sand is the mixed sand of machine-made sand and molybdenum tailing sand, and the weight ratio of the machine-made sand to the molybdenum tailing sand is 1: 0.1-0.2.
On the basis of the scheme, the mixed sand is the mixed sand of the machine-made sand and the molybdenum tailing sand, and the weight ratio of the machine-made sand to the molybdenum tailing sand is 1: 0.15.
On the basis of the scheme, the glass powder is waste glass powder with 100-200 meshes.
On the basis of the 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 scheme, the expanding agent is water-soluble polyurethane and is one of polyether type polyurethane, polyester type polyurethane and ether ester mixed polyurethane.
On the basis of the scheme, the thickening agent is cellulose ether.
On the basis of the 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 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 sleeve grouting material for the prefabricated part, which comprises the following steps:
step 1, weighing the components in parts by weight;
step 2, stirring the machine-made sand and the molybdenum tailing sand in a mortar stirrer at a medium speed for 3-5 min to obtain mixed sand;
step 3, adding the thickening agent, the toughening agent and the expanding agent into a reaction kettle, adding water, adjusting the temperature to 20-40 ℃, and stirring for 10-20 min to dissolve;
step 4, adding the mixed sand and the glass powder obtained in the step 2 into the step 3 under stirring, and continuously stirring for 20-30 min;
and 5, adding a polycarboxylic acid water reducing agent and cement into the material obtained in the step 4, uniformly stirring for 10-20 min, and finally adding the balance of water to obtain the sleeve grouting material for the prefabricated part.
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 introduced polycarboxylate superplasticizer is a comprehensive shrinkage-reducing polycarboxylate superplasticizer, can release a fluorocarbon structure and a phosphate ester structure in a molecular structure of the polycarboxylate superplasticizer in the process of mixing the polycarboxylate superplasticizer with water, has the functions of defoaming and reducing hydration heat, and can reduce the surface tension of a material liquid phase under an alkaline condition, achieve the effect of reducing shrinkage and greatly improve the flow property. The toughening agent is added into the grouting material prepared by the invention, so that the defect of brittleness of the cement-based grouting material is reduced, and the grouting material can be used for treating existing expansion joints and movable joints.
In the preferred scheme, the molybdenum tailing sand with a small fineness modulus and the machine-made sand with a large fineness modulus are used in a composite mode, so that the mixed sand meets the requirement of gradation, good water consumption is kept, meanwhile, good strength is kept, the filling effect of the mixed sand and the volcanic ash effect of glass powder enable the prepared dry powder grouting material for the steel sleeve to be compact, the reinforcing effect is obvious, and the mechanical property of the dry powder grouting material is improved.
In a preferable scheme, the water-soluble polyurethane is adopted as an expanding agent, the water-soluble polyurethane 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.
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 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 63 parts of machine-made sand and 7 parts of molybdenum tailing sand by weight, and stirring at medium speed in a sand-glue stirrer for 5min to obtain mixed sand. Adding 1 part of water-soluble polyether polyurethane, 1 part of hydroxyethyl methyl cellulose ether and 1 part of methyl methacrylate-butadiene-styrene polymer into a reaction kettle, adding water, adjusting the temperature to 20 ℃, stirring for 20min to dissolve the water, then adding mixed sand and 20 parts of 100-mesh beer bottle grinding fine powder under stirring, continuing stirring for 20min, then adding 1 part of polycarboxylic acid water reducer and 70 parts of cement, uniformly stirring for 20min, and adding the balance of water to obtain the sleeve grouting material for the prefabricated part.
Example 2
Weighing 68 parts of machine-made sand and 12 parts of molybdenum tailing sand by weight, and stirring at medium speed in a sand mixer for 4min to obtain mixed sand. Adding 2 parts of water-soluble polyester polyurethane, 2 parts of hydroxypropyl methyl cellulose ether and 2 parts of acrylonitrile-butadiene-styrene polymer into a reaction kettle, adding water, adjusting the temperature to 30 ℃, stirring for 15min to dissolve the water, then adding 25 parts of mixed sand and 150-mesh waste glass grinding powder under stirring, continuing stirring for 25min, then adding 3 parts of polycarboxylic acid water reducer and 80 parts of cement, uniformly stirring for 15min, and adding the balance of water to obtain the sleeve grouting material for the prefabricated part.
Example 3
Weighing 68 parts of machine-made sand and 12 parts of molybdenum tailing sand by weight, and stirring at medium speed in a sand-glue stirrer for 3min to obtain mixed sand. Adding 2 parts of water-soluble polyester polyurethane, 2 parts of hydroxypropyl methyl cellulose ether and 2 parts of acrylonitrile-butadiene-styrene polymer into a reaction kettle, adding water, adjusting the temperature to 40 ℃, stirring for 10min to dissolve the water, then adding 25 parts of mixed sand and 150-mesh waste glass grinding powder under stirring, continuing stirring for 30min, then adding 3 parts of polycarboxylic acid water reducer and 80 parts of cement, uniformly stirring for 20min, and adding the balance of water to obtain the sleeve grouting material for the prefabricated part.
Example 4
Weighing 80 parts of machine-made sand and 20 parts of molybdenum tailing sand by weight, and stirring at medium speed in a sand-glue stirrer for 5min to obtain mixed sand. Adding 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 into a reaction kettle, adding water, adjusting the temperature to 30 ℃, stirring for 15min to dissolve the water, then adding 30 parts of mixed sand and 200-mesh waste beverage bottle ground powder while stirring, continuing stirring for 25min, then adding 5 parts of polycarboxylic acid water reducing agent and 100 parts of cement, uniformly stirring for 20min, and adding the balance of water to obtain the sleeve grouting material for the prefabricated part.
Comparative example
Weighing 80 parts of ordinary portland cement, 85 parts of quartz sand, 2 parts of an expanding agent, 4 parts of a standard high-performance water reducing agent, 0.5 part of a defoaming agent, 0.5 part of a retarder and 20 parts of water by weight, and stirring in a mortar stirrer for 20min to obtain the reinforcing steel bar sleeve grouting material for the prefabricated part.
The performance of the grouting material JG/T408-2013 Sleeve grouting material for connecting steel bars prepared in the comparative example and the embodiment is tested by a test method, and specific test data are shown in the following table:
TABLE 1
According to the comparison, the comprehensive shrinkage type polycarboxylate water reducer, the water-soluble polyurethane expanding agent and the composite sand are added, so that the effects of good fluidity, high compressive strength and good shrinkage effect are achieved.
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 (9)
1. The utility model provides a sleeve grout material for prefabricated part which characterized in that: the sleeve grouting material is prepared by mixing dry powder of sleeve grouting material for a prefabricated part, water and a polycarboxylic acid water reducing agent; the sleeve grouting material dry powder 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 and 1-3 parts of a toughening agent;
wherein the mass ratio of the sleeve grouting material dry powder for the prefabricated part to water is 1: 0.1-0.15;
the swelling agent is water-soluble polyurethane;
the polycarboxylate superplasticizer is a comprehensive shrinkage-reducing polycarboxylate superplasticizer, the mixing amount is 2% -3%, and the effects of defoaming and low hydration heat are achieved;
the polycarboxylate superplasticizer is a comprehensive shrinkage polycarboxylate superplasticizer, the molecular weight of the polycarboxylate superplasticizer is 30000-50000, the water reduction rate is more than or equal to 30%, and the structural formula is as follows:
wherein R is1is-CH3or-CH2CH3，R2is-CH3，R3is-CF3，R4is-H or-CH3，R5Is an alkyl group of 1 to 5, M1is-H or alkyl H, M2Na or K, wherein a and b are positive integers, and a = 1-20 and b = 1-50;
the mixed sand is the mixed sand of machine-made sand and molybdenum tailing sand;
the weight ratio of the machine-made sand to the molybdenum tailing sand is 1: 0.1-0.2.
2. The sleeve grouting material for prefabricated parts according to claim 1, characterized in that: the weight ratio of the machine-made sand to the molybdenum tailings sand is 1: 0.15.
3. The sleeve grouting material for prefabricated parts according to claim 1, characterized in that: the glass powder is waste glass powder of 100-200 meshes.
4. The sleeve grouting material for prefabricated parts according to claim 3, characterized in that: 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 percent.
5. The sleeve grouting material for prefabricated parts according to claim 1, characterized in that: the water-soluble polyurethane is one of polyether type, polyester type and ether ester mixed polyurethane.
6. The sleeve grouting material for prefabricated parts according to claim 1, characterized in that: the thickening agent is cellulose ether.
7. The sleeve grouting material for prefabricated parts according to claim 6, wherein: the thickening agent is one of hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether and hydroxypropyl methyl cellulose ether.
8. The sleeve grouting material for prefabricated parts according to claim 1, characterized in that: the toughening agent is one of methyl methacrylate-butadiene-styrene polymer, acrylonitrile-butadiene-styrene polymer and chlorinated polyethylene.
9. The method for preparing the sleeve grouting material for the prefabricated part according to any one of claims 1 to 8, characterized by comprising the following steps:
step 1, weighing the components in parts by weight;
step 2, stirring the machine-made sand and the molybdenum tailing sand in a mortar stirrer for 3-5 min to obtain mixed sand;
step 3, adding the thickening agent, the toughening agent and the expanding agent into a reaction kettle, adding water, adjusting the temperature to 20-40 ℃, and stirring for 10-20 min to dissolve;
step 4, adding the mixed sand and the glass powder obtained in the step 2 into the step 3 under stirring, and continuously stirring for 20-30 min;
and 5, adding a polycarboxylic acid water reducing agent and cement into the material obtained in the step 4, uniformly stirring for 10-20 min, and finally adding the balance of water to obtain the sleeve grouting material for the prefabricated part.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911349395.5A CN112707683B (en) | 2019-12-24 | 2019-12-24 | Sleeve grouting material for prefabricated part and preparation method thereof |
| CN202210316563.6A CN114685083B (en) | 2019-12-24 | 2019-12-24 | Polycarboxylate superplasticizer for sleeve grouting material for prefabricated part, grouting material thereof and use method of polycarboxylate superplasticizer |
| MYPI2020002335A MY194806A (en) | 2019-12-24 | 2020-03-31 | Sleeve grouting materials for prefabricated components and preparation method therefor |
| PCT/CN2020/082362 WO2021128629A1 (en) | 2019-12-24 | 2020-03-31 | Sleeve grouting material for prefabricated components and preparation method therefor |
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| CN201911349395.5A CN112707683B (en) | 2019-12-24 | 2019-12-24 | Sleeve grouting material for prefabricated part and preparation method thereof |
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| CN202210316563.6A Division CN114685083B (en) | 2019-12-24 | 2019-12-24 | Polycarboxylate superplasticizer for sleeve grouting material for prefabricated part, grouting material thereof and use method of polycarboxylate superplasticizer |
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| CN112707683A CN112707683A (en) | 2021-04-27 |
| CN112707683B true CN112707683B (en) | 2022-05-10 |
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| CN202210316563.6A Active CN114685083B (en) | 2019-12-24 | 2019-12-24 | Polycarboxylate superplasticizer for sleeve grouting material for prefabricated part, grouting material thereof and use method of polycarboxylate superplasticizer |
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| CN113213857A (en) * | 2021-04-30 | 2021-08-06 | 唐山学院 | High-performance iron tailing sand sleeve grouting material for fabricated building and preparation method thereof |
| CN114592592B (en) * | 2022-02-11 | 2024-04-26 | 瑞洲建设集团有限公司 | Assembled building construction process |
| CN114751694A (en) * | 2022-04-12 | 2022-07-15 | 阳江海上风电实验室 | Cement grouting material suitable for marine environment and preparation method thereof |
| CN114853436B (en) * | 2022-05-10 | 2023-04-14 | 北京建筑材料科学研究总院有限公司 | Low-temperature seat slurry and using method thereof |
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| CN115403320B (en) * | 2022-09-29 | 2023-09-12 | 中交二航局建筑工程有限公司 | Masonry wall surface beating slurry and preparation method thereof |
| CN115677299A (en) * | 2022-10-28 | 2023-02-03 | 中建科技贵州有限公司 | Machine-made sand joint sealing material for fabricated building and preparation method thereof |
| CN115819062A (en) * | 2022-12-02 | 2023-03-21 | 中铁建华南建设(广州)高科技产业有限公司 | Synchronous grouting dry material, preparation method thereof and large-diameter shield slurry for water-rich sand layer |
| CN116143483B (en) * | 2023-04-18 | 2023-06-23 | 山东君鹏节能科技有限公司 | Preparation method of cement-based grouting material |
| CN118479837B (en) * | 2024-07-16 | 2024-09-20 | 合肥晶宫绿建节能建筑有限责任公司 | Preparation method for preparing sleeve grouting material for steel bar connection by using machine-made sand |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114685083A (en) | 2022-07-01 |
| MY194806A (en) | 2022-12-16 |
| WO2021128629A1 (en) | 2021-07-01 |
| CN112707683A (en) | 2021-04-27 |
| CN114685083B (en) | 2023-04-18 |
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