CN112408909A - High-performance sleeve grouting material for prefabricated building and preparation method thereof - Google Patents
High-performance sleeve grouting material for prefabricated building and preparation method thereof Download PDFInfo
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- CN112408909A CN112408909A CN202011312817.4A CN202011312817A CN112408909A CN 112408909 A CN112408909 A CN 112408909A CN 202011312817 A CN202011312817 A CN 202011312817A CN 112408909 A CN112408909 A CN 112408909A
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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
- C04B28/04—Portland 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B2111/00008—Obtaining or using nanotechnology related materials
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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
Abstract
The invention discloses a high-performance sleeve grouting material for an assembly type building and a preparation method thereof. The sleeve grouting material comprises the following raw materials in parts by weight: 35-50 parts of cement, 30-45 parts of quartz sand, 5-10 parts of fly ash, 5-10 parts of mineral powder, 1-2 parts of superfine admixture, 0.2-0.4 part of water reducing agent, 0.05-0.12 part of defoaming agent, 0-8 parts of expanding agent, 0-1 part of early strength admixture, 0-0.1 part of retarder, 0-0.05 part of thickening agent and 0-10 parts of thermoplastic elastomer particles modified by titanate coupling agent. The preparation method comprises the following steps: firstly, mixing and stirring cement, fly ash, mineral powder, an ultramicro admixture, a water reducing agent, a defoaming agent, an expanding agent, an early strength agent, a retarder, a thickening agent and modified thermoplastic elastomer particles; and adding the quartz sand in batches, and stirring after adding each time to obtain the high-performance sleeve grouting material for the fabricated building. The high-performance sleeve grouting material for the fabricated building has the characteristics of good fluidity, no air bubbles, no shrinkage in later period, good vibration damping performance, stable and reliable performance and high strength.
Description
Technical Field
The invention relates to a high-performance sleeve grouting material for an assembly type building and a preparation method thereof, and belongs to the technical field of building materials.
Background
The prefabricated part node connection in the prefabricated building at present generally uses reinforcing bar sleeve connector, and the adhesive in the reinforcing bar sleeve connection technology mainly uses grouting material. Therefore, the quality of the sleeve grouting material is related to the structural reliability and stability of the connection part of the prefabricated part, and the use safety of the building structure is also influenced.
However, in many grouting material formulas at present, the used main cementing materials comprise special cement such as sulphoaluminate cement and the like, the price is high, the mechanical properties, particularly the performance fluctuation of later strength and the like, is large, and the engineering hidden danger is easily caused. In addition, the existing grouting material also has the problems of poor fluidity, lower 28-day compressive strength and the like.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems of poor fluidity, low strength, high raw material price and the like of the existing sleeve grouting material, the invention provides the high-performance sleeve grouting material for the fabricated building, and the grouting material has the advantages of good fluidity, good water-retaining property, no air bubbles, no corrosion to reinforcing steel bars, high strength and the like; meanwhile, a preparation method of the high-performance sleeve grouting material for the fabricated building is provided.
The technical scheme is as follows: the invention relates to a high-performance sleeve grouting material for an assembly type building, which comprises the following raw materials in parts by weight: 35-50 parts of cement, 30-45 parts of quartz sand, 5-10 parts of fly ash, 5-10 parts of mineral powder, 1-2 parts of superfine admixture, 0.2-0.4 part of water reducing agent, 0.05-0.12 part of defoaming agent, 0-8 parts of expanding agent, 0-1 part of early strength admixture, 0-0.1 part of retarder, 0-0.05 part of thickening agent and 0-10 parts of thermoplastic elastomer particles modified by titanate coupling agent.
Wherein, the superfine admixture is preferably a mixture of nano silicon dioxide and superfine silica fume. Further, the ultramicro admixture is composed of nano silicon dioxide with the particle size of 20-50nm and superfine silica fume with the particle size of 300-600 meshes. Wherein, the mass percentage of the nano silicon dioxide can be 40 to 80 percent, and the mass percentage of the superfine silica fume can be 20 to 60 percent; optionally, the mass percentage of the nano silicon dioxide and the superfine silica fume is 50%.
In the thermoplastic elastomer particles modified by the titanate coupling agent, the titanate coupling agent can be one or more of isopropyl tri (dioctyl pyrophosphate) titanate, triisostearoyl isopropyl titanate, di (dioctyl pyrophosphoryl) oxyacetyl titanium and tetraisopropyl di (dilauryl phosphite) titanate. The thermoplastic elastomer particles can be one or more of polystyrene, polyolefin, polyurethane and polyurethane; the particle size of the thermoplastic elastomer particles is preferably 100-300 microns. The modification method can be as follows: mixing thermoplastic elastomer particles with the weight ratio of 1 (0.05-0.2) and a titanate coupling agent, and fully activating to obtain the modified thermoplastic elastomer particles. Further, the weight ratio of the thermoplastic elastomer particles to the titanate coupling agent is preferably 1: 0.05.
The thickener can be one or more of methylcellulose, carboxymethyl cellulose, ethyl hydroxyethyl cellulose, carboxymethyl hydroxyethyl cellulose and hydroxypropyl cellulose, and the mixing amount is preferably 0.001% -0.05%.
The cement is preferably an early strength portland cement having a strength grade of not less than 52.5R.
The quartz sand can be prepared from 50-80% of quartz sand with a particle size of 0.15-0.6mm and 20-50% of quartz sand with a particle size of 1.2-2.36 mm. Optionally, the mass content of the quartz sand with the two particle sizes is 50%.
The invention relates to a preparation method of a high-performance sleeve grouting material for an assembly type building, which comprises the following steps:
(1) weighing 0-10 parts of thermoplastic elastomer particles in parts by weight, and modifying by adopting a titanate coupling agent;
(2) adding 35-50 parts by weight of cement, 5-10 parts by weight of fly ash, 5-10 parts by weight of mineral powder, 1-2 parts by weight of superfine admixture, 0.2-0.4 part by weight of water reducing agent, 0.05-0.12 part by weight of defoaming agent, 0-8 parts by weight of expanding agent, 0-1 part by weight of early strength admixture, 0-0.1 part by weight of retarder, 0-0.05 part by weight of thickening agent and the thermoplastic elastomer particles modified by titanate coupling agent obtained in the step (1) into a stirrer and stirring for 5-10 minutes;
(3) and (3) adding 30-45 parts of quartz sand into the mixture obtained in the step (2) in batches, and stirring for 5-10 minutes each time to obtain the high-performance sleeve grouting material for the fabricated building.
In the step (1), the method for modifying by adopting the titanate coupling agent comprises the following steps: mixing thermoplastic elastomer particles and a titanate coupling agent according to the weight ratio of 1 (0.05-0.2), and fully activating to obtain the thermoplastic elastomer particles modified by the titanate coupling agent.
The invention principle is as follows: the modified thermoplastic elastomer particles are added into the grouting material, the thermoplastic elastomer particles show rubber elasticity at normal temperature, so that the elasticity and toughness of the grouting material are increased to achieve the aim of damping, the grouting material is plasticized and formed at high temperature, a certain external load is absorbed, the strength loss of the grouting material is compensated, and the structure is stable; and the thermoplastic elastomer is modified by adopting the titanate coupling agent, so that the combination condition of the elastomer and other inorganic components in the grouting material can be improved to a great extent, and the overall performance of the grouting material is improved. The invention adopts the nano-silica and the superfine silica fume as the superfine admixture, wherein the nano-silica is used as a nano particle and can fill the micropores of the grouting material, so that the structure is more compact, the performance is better, the hydration activity of the silica fume is very high, the strength of the grouting material can be improved to a great extent, the nano-silica and the superfine silica fume are combined for use, and the obtained grouting material has high strength and good fluidity, and the durability is also greatly improved because the compactness is improved.
Has the advantages that: compared with the prior art, the invention has the advantages that: (1) the grouting material of the invention utilizes the spherical structure of the fly ash and the spherical structure of the nano silicon dioxide to improve the fluidity of the grouting material to a great extent, and simultaneously improves the mechanical properties such as the strength and the like of the grouting material to a great extent by adding the modified thermoplastic elastomer particles and the high-activity ultramicro admixture, and the finally prepared high-performance sleeve grouting material for the fabricated building has the characteristics of good fluidity, no air bubbles, no shrinkage in the later period, good vibration damping performance, stable and reliable performance and high strength; (2) the high-performance sleeve grouting material for the fabricated building provided by the invention is flexible in proportioning, meets the technical requirements of JG/T408-2013 sleeve grouting material for reinforcing steel bar connection, is good in adaptability of practical engineering requirements, and is suitable for industrial application.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
Example 1
10 parts of thermoplastic elastomer particles having a particle size of 100 μm were placed in a round-bottomed flask containing 50 parts of methanol, heated to 80 ℃ and 0.5 part of isopropyl tris (dioctyl pyrophosphate) titanate previously dissolved in 5 parts of methanol was added dropwise to the round-bottomed flask while stirring for 24 hours, taken out, washed and dried to obtain modified thermoplastic elastomer particles.
35 parts of cement, 10 parts of fly ash, 10 parts of mineral powder and 1 part of nano SiO with the particle size of 30nm21 part of superfine silica fume with the particle size of 600 meshes, 0.2 part of polycarboxylic acid water reducing agent, 0.05 part of organic silicon defoaming agent, 2 parts of CSA plastic expanding agent, 1 part of amine early strength agent, 0.1 part of sugar retarder, 0.05 part of cellulose thickening agent and modified thermoplastic elastomer particles are stirred for 5 minutes by a stirrer; then adding 22.5 parts of 0.15-0.6mm quartz sand, stirring for 5 minutes, then adding 22.5 parts of 1.2-2.36mm quartz sand, and stirring for 5 minutes to obtain the high-performance sleeve grouting material for the prefabricated building.
Example 2
The high-performance sleeve grouting material for the fabricated building is prepared by the following steps:
8 parts of thermoplastic elastomer particles having a particle size of 200 μm were placed in a round-bottomed flask containing 40 parts of methanol, heated to 80 ℃ and 0.4 part of isopropyl tris (dioctyl pyrophosphate) titanate previously dissolved in 4 parts of methanol was added dropwise to the round-bottomed flask with continuous stirring for 24 hours, taken out, washed and dried to obtain modified thermoplastic elastomer particles.
40 parts of cement, 8 parts of fly ash, 8 parts of mineral powder and 0.8 part of nano SiO with the particle size of 35nm20.8 part of superfine silica fume with the particle size of 500 meshes, 0.3 part of polycarboxylic acid water reducing agent, 0.1 part of organic silicon defoaming agent, 4 parts of CSA plastic expanding agent, 1 part of amine early strength agent, 0.1 part of carbohydrate retarder, 0.05 part of cellulose thickening agent and modified thermoplastic elastomer particles are stirred for 5 minutes by a stirrer; and then adding 20 parts of 0.15-0.6mm quartz sand, stirring for 5 minutes, then adding 20 parts of 1.2-2.36mm quartz sand, and stirring for 5 minutes to obtain the high-performance sleeve grouting material for the prefabricated building.
Example 3
The high-performance sleeve grouting material for the fabricated building is prepared by the following steps:
6 parts of thermoplastic elastomer particles having a particle size of 250 μm were placed in a round-bottomed flask containing 30 parts of methanol, heated to 80 ℃ and 0.3 part of isopropyl tris (dioctyl pyrophosphate) titanate previously dissolved in 3 parts of methanol was added dropwise to the round-bottomed flask with continuous stirring for 24 hours, taken out, washed and dried to obtain modified thermoplastic elastomer particles.
45 parts of cement, 6 parts of fly ash, 6 parts of mineral powder and 0.5 part of nano SiO with the particle size of 50nm20.5 part of superfine silica fume with the particle size of 400 meshes, 0.4 part of polycarboxylic acid water reducing agent, 0.12 part of organic silicon defoaming agent, 6 parts of CSA plastic expanding agent, 0.2 part of amine early strength agent, 0.1 part of carbohydrate retarder, 0.05 part of cellulose thickening agent and modified thermoplastic elastomer particles are stirred for 5 minutes by a stirrer; and then adding 17.5 parts of 0.15-0.6mm quartz sand, stirring for 5 minutes, then adding 17.5 parts of 1.2-2.36mm quartz sand, and stirring for 5 minutes to obtain the high-performance sleeve grouting material for the prefabricated building.
Example 4
The high-performance sleeve grouting material for the fabricated building is prepared by the following steps:
4 parts of thermoplastic elastomer particles having a particle size of 300 μm were placed in a round-bottomed flask containing 20 parts of methanol, heated to 80 ℃, 0.2 part of isopropyl tris (dioctyl pyrophosphate) titanate previously dissolved in 2 parts of methanol was added dropwise to the round-bottomed flask while stirring for 24 hours, taken out, washed and dried to obtain modified thermoplastic elastomer particles.
50 parts of cement, 5 parts of fly ash, 5 parts of mineral powder and 0.5 part of nano SiO with the particle size of 20nm20.5 part of superfine silica fume with the particle size of 300 meshes, 0.4 part of polycarboxylic acid water reducing agent, 0.12 part of organic silicon defoaming agent, 8 parts of CAS plastic expanding agent, 0.2 part of amine early strength agent, 0.1 part of carbohydrate retarder, 0.05 part of cellulose thickening agent and modified thermoplastic elastomer particles are stirred for 5 minutes by a stirrer; and then adding 15 parts of 0.15-0.6mm quartz sand, stirring for 5 minutes, then adding 15 parts of 1.2-2.36mm quartz sand, and stirring for 5 minutes to obtain the high-performance sleeve grouting material for the prefabricated building.
Comparative example 1
The common sleeve grouting material sold in the market comprises the following typical components: 40 parts of cement, 5 parts of fly ash, 1.5 parts of silica fume, 0.3 part of polycarboxylic acid water reducing agent, 0.1 part of organic silicon defoaming agent, 8 parts of CSA plastic expanding agent, 0.5 part of amine early strength agent, 0.3 part of saccharide retarder, 0.05 part of cellulose thickener, 30 parts of 0.38-0.86mm quartz sand and 16 parts of 0.22-0.38mm quartz sand.
Comparative example 2
The sleeve grouting material for the fabricated building is prepared by the following steps:
35 parts of cement, 10 parts of fly ash, 10 parts of mineral powder and 1 part of nano SiO with the particle size of 30nm21 part of superfine silica fume with the particle size of 600 meshes, 0.2 part of polycarboxylic acid water reducing agent, 0.05 part of organic silicon defoaming agent, 2 parts of CSA plastic expanding agent, 1 part of amine early strength agent, 0.1 part of sugar retarder and 0.05 part of cellulose thickener are stirred for 5 minutes; then adding 22.5 parts of 0.15-0.6mm quartz sand, stirring for 5 minutes, then adding 22.5 parts of 1.2-2.36mm quartz sand, and stirring for 5 minutes to obtain the high-performance sleeve grouting material for the prefabricated building.
Comparative example 3
The sleeve grouting material for the fabricated building is prepared by the following steps:
6 parts of thermoplastic elastomer particles having a particle size of 250 μm were placed in a round-bottomed flask containing 30 parts of methanol, heated to 80 ℃ and 0.3 part of isopropyl tris (dioctyl pyrophosphate) titanate previously dissolved in 3 parts of methanol was added dropwise to the round-bottomed flask with continuous stirring for 24 hours, taken out, washed and dried to obtain modified thermoplastic elastomer particles.
45 parts of cement, 6 parts of fly ash, 6 parts of mineral powder and 1 part of nano SiO with the particle size of 50nm20.4 part of polycarboxylic acid water reducing agent, 0.12 part of organic silicon defoaming agent, 6 parts of CSA plastic expanding agent, 0.2 part of amine early strength agent, 0.1 part of sugar retarder, 0.05 part of cellulose thickening agent and modified thermoplastic elastomer particles are stirred for 5 minutes by a stirrer; and then adding 17.5 parts of 0.15-0.6mm quartz sand, stirring for 5 minutes, then adding 17.5 parts of 1.2-2.36mm quartz sand, and stirring for 5 minutes to obtain the high-performance sleeve grouting material for the prefabricated building.
Comparative example 4
The sleeve grouting material for the fabricated building is prepared by the following steps:
6 parts of thermoplastic elastomer particles having a particle size of 250 μm were placed in a round-bottomed flask containing 30 parts of methanol, heated to 80 ℃ and 0.3 part of isopropyl tris (dioctyl pyrophosphate) titanate previously dissolved in 3 parts of methanol was added dropwise to the round-bottomed flask with continuous stirring for 24 hours, taken out, washed and dried to obtain modified thermoplastic elastomer particles.
Stirring 45 parts of cement, 6 parts of fly ash, 6 parts of mineral powder, 1 part of superfine silica fume with the particle size of 400 meshes, 0.4 part of polycarboxylic acid water reducing agent, 0.12 part of organic silicon defoaming agent, 6 parts of CSA (CSA plastic expansion agent), 0.2 part of amine early strength agent, 0.1 part of carbohydrate retarder, 0.05 part of cellulose thickening agent and a modified thermoplastic elastomer particle stirrer for 5 minutes; and then adding 17.5 parts of 0.15-0.6mm quartz sand, stirring for 5 minutes, then adding 17.5 parts of 1.2-2.36mm quartz sand, and stirring for 5 minutes to obtain the high-performance sleeve grouting material for the prefabricated building.
The performance test tests were performed on the fabricated building sleeve grouting materials of examples 1-6 and comparative examples 1-4 with reference to JG/T408-2013 sleeve grouting material for steel bar connection. The test results are shown in Table 1.
TABLE 1 Performance index of Sleeve grouting materials prepared in examples 1 to 6 and comparative examples 1 to 4 for Steel Bar connection
(1) Comparing the comparative example 1 with the examples 1-4, it can be seen that the overall performance of the sleeve grouting material provided by the invention is obviously superior to that of the commercial grouting material, and especially the initial fluidity, the 30min fluidity and the compressive strength are obviously higher than those of the comparative example.
(2) Comparing the comparative example 2 with the examples 1 to 4, it can be seen that the addition of the modified thermoplastic elastomer particles in the sleeve grouting material provided by the invention is beneficial to the improvement of the compressive strength of the sleeve grouting material, and the damping ratio of the sleeve grouting material provided by the invention is obviously higher than that of the comparative example 2, which shows that the addition of the modified thermoplastic elastomer particles can obviously improve the damping ratio of the sleeve grouting material and is beneficial to the improvement of the damping vibration attenuation performance of the sleeve grouting material.
(3) Comparing comparative examples 3 and 4 with example 3, it can be seen that the same weight parts of nano SiO were added2And the sleeve grouting material of the superfine silica fume, the porosity of the former is less than that of the latter; nano SiO2The porosity of the sleeve grouting material mixed with the superfine silica fume is obviously lower than that of the sleeve grouting material mixed with the superfine silica fume and the single silica fume, which shows that the nano SiO2Mixed with superfine silica fume to form nanometer SiO2The nanometer effect and the high hydration characteristic of the superfine silica fume generate a synergistic effect, the compactness of the sleeve grouting material is improved, the porosity of the sleeve grouting material is reduced, and the impermeability is enhanced.
Claims (8)
1. The high-performance sleeve grouting material for the fabricated building is characterized by comprising the following raw materials in parts by weight: 35-50 parts of cement, 30-45 parts of quartz sand, 5-10 parts of fly ash, 5-10 parts of mineral powder, 1-2 parts of superfine admixture, 0.2-0.4 part of water reducing agent, 0.05-0.12 part of defoaming agent, 0-8 parts of expanding agent, 0-1 part of early strength admixture, 0-0.1 part of retarder, 0-0.05 part of thickening agent and 0-10 parts of thermoplastic elastomer particles modified by titanate coupling agent.
2. The assembly type high performance sleeve grouting material for building as claimed in claim 1, wherein the ultra-fine admixture is a mixture of nano silica and ultra-fine silica fume.
3. The assembly type high-performance sleeve grouting material for the building as claimed in claim 2, wherein the ultra-fine admixture is composed of nano-silica with a particle size of 20-50nm and ultra-fine silica fume with a particle size of 300-600 meshes; wherein, the mass percent of the nano silicon dioxide is 40-80%, and the mass percent of the superfine silica fume is 20-60%.
4. The fabricated building high-performance sleeve grouting material of claim 1, wherein the titanate coupling agent is one or more of isopropyl tris (dioctyl pyrophosphate) titanate, isopropyl triisostearoyl titanate, di (dioctyl pyrophosphoryl) oxyacetyl titanium, and tetraisopropyl bis (dilauryl phosphite) titanate.
5. The assembly type high-performance sleeve grouting material for building as claimed in claim 1, wherein the thermoplastic elastomer particles are one or more of polystyrenes, polyolefins, polyurethanes and polyurethanes; the particle size of the thermoplastic elastomer particles is 100-300 μm.
6. The assembly type high-performance sleeve grouting material for building as claimed in claim 1, wherein the preparation process of the titanate coupling agent modified thermoplastic elastomer particles is as follows: mixing thermoplastic elastomer particles and a titanate coupling agent according to the weight ratio of 1 (0.05-0.2), and fully activating to obtain the modified thermoplastic elastomer particles.
7. A preparation method of a high-performance sleeve grouting material for an assembly type building is characterized by comprising the following steps:
(1) weighing 0-10 parts of thermoplastic elastomer particles in parts by weight, and modifying by adopting a titanate coupling agent;
(2) adding 35-50 parts by weight of cement, 5-10 parts by weight of fly ash, 5-10 parts by weight of mineral powder, 1-2 parts by weight of superfine admixture, 0.2-0.4 part by weight of water reducing agent, 0.05-0.12 part by weight of defoaming agent, 0-8 parts by weight of expanding agent, 0-1 part by weight of early strength admixture, 0-0.1 part by weight of retarder, 0-0.05 part by weight of thickening agent and the thermoplastic elastomer particles modified by titanate coupling agent obtained in the step (1) into a stirrer and stirring for 5-10 minutes;
(3) and (3) adding 30-45 parts of quartz sand into the mixture obtained in the step (2) in batches, and stirring for 5-10 minutes each time to obtain the high-performance sleeve grouting material for the fabricated building.
8. The preparation method of the high-performance sleeve grouting material for the fabricated building according to claim 1, wherein in the step (1), the modification method comprises the following steps: mixing the thermoplastic elastomer particles with a titanate coupling agent according to the weight ratio of 1 (0.05-0.2), and fully activating to obtain the thermoplastic elastomer particles modified by the titanate coupling agent.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111116132A (en) * | 2019-12-25 | 2020-05-08 | 中冶建筑研究总院有限公司 | Grouting material for combined structure and assembly type building node and preparation method thereof |
| CN111170693A (en) * | 2020-01-10 | 2020-05-19 | 重庆中科建设（集团）有限公司 | High-performance grouting material for fabricated building and preparation method thereof |
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| JPH06346006A (en) * | 1993-06-08 | 1994-12-20 | Fukuda Metal Foil & Powder Co Ltd | Water-based electrically conductive coating |
| CN1305972A (en) * | 2001-02-23 | 2001-08-01 | 重庆大学 | External insulating mortar and its preparing process |
| WO2004033770A1 (en) * | 2002-05-10 | 2004-04-22 | Redco S.A. | Method for profiled cement-based products and reinforcing fibers therefor |
| CN101209914A (en) * | 2007-12-24 | 2008-07-02 | 上海东升新材料有限公司 | Dry powder mortar composition for air bubble lightweight concrete and preparation method thereof |
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| CN108530006A (en) * | 2018-05-30 | 2018-09-14 | 广州市建筑科学研究院有限公司 | A kind of fabricated construction connection reinforced bar sleeve grouting material and preparation method thereof |
| CN111116132A (en) * | 2019-12-25 | 2020-05-08 | 中冶建筑研究总院有限公司 | Grouting material for combined structure and assembly type building node and preparation method thereof |
| CN111170693A (en) * | 2020-01-10 | 2020-05-19 | 重庆中科建设（集团）有限公司 | High-performance grouting material for fabricated building and preparation method thereof |
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