CN113135723A - Large-flow-state cement-based grouting material for semi-flexible pavement and preparation method thereof - Google Patents
Large-flow-state cement-based grouting material for semi-flexible pavement and preparation method thereof Download PDFInfo
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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
- C04B28/06—Aluminous 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
- 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
- C04B18/082—Cenospheres
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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 large flow state cement-based grouting material for a semi-flexible pavement and a preparation method thereof, wherein the material comprises the following components: 35-60 parts of fast hardening sulphoaluminate cement, 15-40 parts of modified microspheres, 10-30 parts of fine aggregate, 0.01-0.3 part of early strength agent, 0.1-0.5 part of water reducing agent, 0.05-0.2 part of water retaining agent, 0.001-0.1 part of defoaming agent, 4-5.5 parts of expanding agent and 20-35 parts of water. Through the synergistic matching of the components, the invention realizes the performance improvement of high fluidity, high flow rate and high perfusion rate on the basis of higher hourly strength, has the advantages of short construction period, no need of vibration, convenient construction, high cost performance and the like, and meets the requirement of rapid open traffic of road engineering.
Description
Technical Field
The invention relates to a large flow state cement-based grouting material for a semi-flexible pavement and a preparation method thereof.
Background
The semi-flexible pavement is a novel rigid-flexible composite pavement formed by pouring a large flow state cement mortar into a macroporous asphalt mixture, so that the pavement has the flexibility of an asphalt pavement and the rigidity of a cement concrete pavement. The semi-flexible pavement material has proved to be capable of remarkably improving the problems of rutting resistance, water invasion resistance, weather resistance and the like of the asphalt pavement material, and can be used for bus stations, road intersections, parking lots, toll stations, gas stations and the like.
CN201711273690.8 discloses a cement-based grouting material for an early-strength semi-flexible pavement, which comprises sulphoaluminate cement, silica fume, water, a water reducing agent, a defoaming agent and the like, wherein the material has small bleeding rate and drying shrinkage, but the fluidity is not evaluated. CN201510396857.4 also discloses a high early strength cement-based filling material for semi-flexible composite pavement, which comprises Portland cement, an expanding agent, quartz sand, a water reducing agent, a stabilizing agent and the like, wherein the material has relatively high fluidity, but relatively low early strength, and can not meet the requirement of rapid traffic opening of municipal road engineering, thereby influencing the engineering application of the semi-flexible pavement material on the municipal road.
The fluidity and early strength of the cement-based grouting material are contradictory, and the fluidity greatly reduces the early strength, and the early strength reduces the fluidity. For the cement-based grouting material for the semi-flexible pavement, the high early strength is generally required in order to meet the purpose of quickly opening traffic, but the fluidity of the grouting material is reduced, so that the grouting material is difficult to pour in the construction process, and the construction difficulty is increased. At present, no cement-based grouting material with high early strength and good fluidity is reported.
Disclosure of Invention
Aiming at the defect that the fluidity and the early strength of the cement-based grouting material for the semi-flexible pavement are contradictory with each other and cannot meet the construction requirements of the existing roads, the invention provides the large-flow-state cement-based grouting material for the semi-flexible pavement, which improves the fluidity of the grouting material and reduces the construction difficulty on the basis of ensuring that the early strength meets the quick open traffic of municipal road engineering through the synergistic effect of various components, particularly through the use of modified microspheres, and has the characteristics of large fluidity, high flow rate, high hourly strength, no bleeding and segregation, low cost, small shrinkage and the like.
The fly ash can improve the fluidity of the grouting material, but the fly ash has lower activity and is not beneficial to improving the strength of the grouting material. In comparison, the fly ash micro-beads are selected and processed from fly ash, so that the strength of the grouting material is not adversely affected, and the activity of the grouting material is superior to that of the fly ash. However, the fly ash micro-beads have small particle size and are easy to agglomerate, so the fly ash micro-beads are rarely applied to grouting materials. The invention aims at the problem that the fly ash microspheres are easy to agglomerate, carries out pretreatment modification on the fly ash microspheres, solves the problem that the fly ash microspheres are easy to agglomerate, adds the pretreated modified microspheres into the cement-based grouting material, and can improve the fluidity of the grouting material for the semi-flexible pavement and the early strength (the strength in 2 hours) by the synergistic collocation of the modified microspheres and other components, thereby realizing the rapid traffic opening.
The specific technical scheme of the invention is as follows:
a large flow state cement-based grouting material for a semi-flexible pavement comprises the following components in parts by weight: 35-60 parts of fast hardening sulphoaluminate cement, 15-40 parts of modified microspheres, 10-30 parts of fine aggregate, 0.01-0.3 part of early strength agent, 0.1-0.5 part of water reducing agent, 0.05-0.2 part of water retaining agent, 0.001-0.1 part of defoaming agent, 4-5.5 parts of expanding agent and 20-35 parts of water.
Preferably, the high flow cement-based grouting material for the semi-flexible pavement comprises the following components in parts by weight: 50 parts of rapid hardening sulphoaluminate cement, 25 parts of modified microbeads, 20 parts of superfine quartz sand, 0.02 part of early strength agent, 0.3 part of water reducing agent, 0.08 part of water retaining agent, 0.1 part of defoaming agent, 4.5 parts of expanding agent and 30 parts of water.
Further, the high flow state of the present invention means that the 20min fluidity of the cement-based grouting material is within 15 s.
Furthermore, the quick-hardening sulphoaluminate cement is quick-hardening early-strength sulphoaluminate cement with a strength grade of 42.5 or 52.5.
Further, the modified microbead is a mixture which is obtained by mixing the fly ash microbead, the viscosity reducer and the anionic surfactant at a high speed. The viscosity reducer is polyethylene glycol with the molecular weight of 800-1200, and preferably polyethylene glycol with the molecular weight of 1000. The anionic surfactant is sodium dodecyl benzene sulfonate, sodium dodecyl sulfonate or sodium dodecyl sulfate, preferably sodium dodecyl benzene sulfonate.
Furthermore, the fly ash microbeads are global particles, and the particle size is 0.1-5.0 microns.
Furthermore, in the modified microbeads, the content of the fly ash microbeads is 85-95 wt%, the content of the viscosity reducer is 1-5 wt%, and the content of the anionic surfactant is 4-10 wt%.
Furthermore, when the modified microbeads are prepared, the mixing speed is more than or equal to 2000r/min, preferably 2000-2500 r/min, and the mixing time is 15-20 min.
Further, the particle size of the superfine quartz sand is 100-200 meshes and SiO2The content is more than or equal to 96 wt.%.
Further, the early strength agent is lithium carbonate or/and lithium chloride, and preferably lithium carbonate.
Further, the water reducing agent is a powder water-reducing polycarboxylic acid water reducing agent or/and a low-air-entraining early-strength polycarboxylic acid water reducing agent, and preferably a powder water-reducing polycarboxylic acid water reducing agent.
Further, the water retaining agent is low-viscosity cellulose ether or/and anionic polyacrylamide with the molecular weight of 800-1200 ten thousand, and preferably the low-viscosity cellulose ether.
Further, the defoaming agent is a powdery organic silicon or/and polyether modified polysiloxane defoaming agent, preferably a polyether modified polysiloxane defoaming agent.
Further, the swelling agent is a magnesium oxide swelling agent or/and a calcium sulphoaluminate swelling agent, preferably a calcium sulphoaluminate swelling agent.
Further, the invention also provides a preparation method of the high flow state cement-based grouting material for the semi-flexible pavement, which comprises the following steps: and (3) stirring all the materials except water at a low speed to uniformly mix the materials, then adding water, stirring at a low speed after adding, and stirring at a high speed to obtain the high-flow cement-based grouting material for the semi-flexible pavement.
Further, the preparation method specifically comprises the following steps: and (2) stirring all the materials except water at a low speed for 2-3 min in a stirring pot with the rotating speed of 60-70 r/min, fully mixing all the materials, adding water at one time, stirring for 30-60 s at the rotating speed of 60-70 r/min after adding, and stirring for 3-5 min at the rotating speed of 1000-1200 r/min to obtain the high-flow cement-based grouting material for the semi-flexible pavement.
Compared with the prior art, the invention has the beneficial effects that:
1. because the fly ash microbeads have smaller particle size and are easy to agglomerate to influence normal use, the fly ash microbeads are modified by the viscosity reducer and the surfactant, so that the surfaces of the fly ash microbeads are charged identically, agglomeration is reduced or avoided, and the ball effect of the microbeads is fully exerted, thereby increasing the fluidity of the cement-based grouting material.
2. Through the synergistic matching of the components, the invention realizes the performance improvement of high fluidity, high flow rate and high perfusion rate on the basis of higher hourly strength, has the advantages of short construction period, no need of vibration, convenient construction, high cost performance and the like, and meets the requirement of rapid open traffic of road engineering.
3. The large flow state cement-based grouting material mortar for the semi-flexible pavement is uniform and stable, does not bleed or segregate, is well combined with an asphalt mixture, and has the characteristics of good volume stability, good durability, no toxicity, no harm, no pollution to water quality and the surrounding environment and the like after being hardened.
Detailed Description
For a better understanding of the present invention, the following examples are included to further illustrate the present invention and are not to be construed as limiting the scope of the present invention.
The reagents, starting materials, and the like used in the following examples are commercially available or commonly used in the art.
Example 1
A large flow state cement-based grouting material for a semi-flexible pavement comprises the following components in parts by weight: 50 parts of rapid hardening sulphoaluminate cement, 25 parts of modified micro-beads, 20 parts of fine aggregate, 0.02 part of early strength agent, 0.3 part of water reducing agent, 0.08 part of water retention agent, 0.1 part of defoaming agent, 4.5 parts of expanding agent and 30 parts of water.
The quick-hardening sulphoaluminate cement is quick-hardening early-strength sulphoaluminate cement with the strength grade of 42.5.
The fine aggregate is superfine quartz sand with the particle size of 100-200 meshes and SiO2The content is more than or equal to 96 wt.%.
The early strength agent is lithium carbonate.
The water reducing agent is a powder water reducing type polycarboxylate water reducing agent.
The water retaining agent is 400-viscosity cellulose ether.
The defoaming agent is polyether modified polysiloxane defoaming agent.
The expanding agent is calcium sulphoaluminate expanding agent.
The preparation method of the modified microbead comprises the following steps: and (3) taking 95 parts of fly ash microbeads, 1 part of polyethylene glycol with the molecular weight of 1000 and 4 parts of sodium dodecyl benzene sulfonate, and fully mixing for 15min by adopting a high-speed mixer at the rotating speed of 2000r/min to obtain the composite material. Wherein the particle size of the fly ash micro-bead is 0.1-5.0 μm.
The preparation method of the large flow state cement-based grouting material for the semi-flexible pavement comprises the following steps: firstly, weighing each powder material, then firstly stirring the powder material for 2min at a low speed in a stirring pot with the rotating speed of 65r/min to fully mix the materials, then adding mixing water at one time, stirring the mixture for 30s at the rotating speed of 65r/min, and then quickly stirring the mixture for 3min at the rotating speed of 1000r/min to obtain the high-flow cement-based grouting material for the semi-flexible pavement.
According to JTT/1238-:
according to the technical indexes of JTG F40-2004 technical Specification for construction of asphalt pavement for road of traffic transportation department, the semi-flexible pavement of the embodiment is filled with the large-flow cement-based grouting material into the large-gap asphalt mixture, and the performance of the obtained semi-flexible pavement material is detected, and the result is as follows:
example 2
The high flow cement-based grouting material for a semi-flexible pavement was prepared according to the method of example 1, except that the modified beads were prepared by: and taking 85 parts of fly ash microbeads, 5 parts of 2000-molecular-weight polyethylene glycol and 10 parts of sodium dodecyl sulfate, and fully mixing for 15min by a high-speed mixer at the rotating speed of 2000r/min to obtain the material. Wherein the particle size of the fly ash micro-bead is 0.1-5.0 μm.
According to JTT/1238-:
according to the technical indexes of JTG F40-2004 technical Specification for construction of asphalt pavement for road of traffic transportation department, the semi-flexible pavement of the embodiment is filled with the large-flow cement-based grouting material into the large-gap asphalt mixture, and the performance of the obtained semi-flexible pavement material is detected, and the result is as follows:
example 3
The high flow cement-based grouting material for a semi-flexible pavement was prepared according to the method of example 1, except that the modified beads were prepared by: and (3) taking 90 parts of fly ash microbeads, 3 parts of 1500 molecular weight polyethylene glycol and 7 parts of sodium dodecyl sulfate, and fully mixing for 15min by using a high-speed mixer at the rotating speed of 2500r/min to obtain the composite material. Wherein the particle size of the fly ash micro-bead is 0.1-5.0 μm.
According to JTT/1238-:
according to the technical indexes of JTG F40-2004 technical Specification for construction of asphalt pavement for road of traffic transportation department, the semi-flexible pavement of the embodiment is filled with the large-flow cement-based grouting material into the large-gap asphalt mixture, and the performance of the obtained semi-flexible pavement material is detected, and the result is as follows:
example 4
The high flow state cement-based grouting material for the semi-flexible pavement is prepared according to the method of the embodiment 1, except that the weight parts of the components are as follows: 40 parts of rapid hardening sulphoaluminate cement, 40 parts of modified microbeads, 10 parts of fine aggregate, 0.3 part of early strength agent, 0.1 part of water reducing agent, 0.05 part of water retaining agent, 0.03 part of defoaming agent, 5.5 parts of expanding agent and 24 parts of water.
According to JTT/1238-:
according to the technical indexes of JTG F40-2004 technical Specification for constructing asphalt road surfaces, the semi-flexible road surface of the embodiment is filled with the large-flow cement-based grouting material into the large-gap asphalt mixture, and the performance of the obtained semi-flexible road surface material is detected, so that the result meets the requirements.
Example 5
The high flow state cement-based grouting material for the semi-flexible pavement is prepared according to the method of the embodiment 1, except that the weight parts of the components are as follows: 60 parts of rapid hardening sulphoaluminate cement, 15 parts of modified microbeads, 30 parts of fine aggregate, 0.1 part of early strength agent, 0.5 part of water reducing agent, 0.2 part of water retention agent, 0.05 part of defoaming agent, 4 parts of expanding agent and 35 parts of water.
According to JTT/1238-:
according to the technical indexes of JTG F40-2004 technical Specification for constructing asphalt road surfaces, the semi-flexible road surface of the embodiment is filled with the large-flow cement-based grouting material into the large-gap asphalt mixture, and the performance of the obtained semi-flexible road surface material is detected, so that the result meets the requirements.
Comparative example 1
A cement-based grouting material was prepared according to the method of example 1, except that: and replacing 25 parts of modified microbeads with 25 parts of fly ash with the particle size of 5-30 mu m.
The cement-based grouting material prepared in the comparative example is tested according to GB/T50448-2015 technical Specification for application of cement-based grouting materials, and the results are as follows:
according to the technical indexes of JTG F40-2004 technical Specification for construction of asphalt pavement for roads by the department of transportation, the cement-based grouting material of the comparative example is poured into the asphalt mixture with large gaps, and the performance of the obtained semi-flexible pavement material is detected, wherein the results are as follows:
comparative example 2
A cement-based grouting material was prepared according to the method of example 1, except that: the preparation method of the modified microbead comprises the following steps: and (3) taking 95 parts of fly ash microbeads, 1 part of 4-hydroxybutyl vinyl polyoxyethylene ether and 4 parts of allyl polyoxyethylene ether, and fully mixing for 15min by using a high-speed mixer at the rotating speed of 2000r/min to obtain the composite material. Wherein the particle size of the fly ash micro-bead is 0.1-5.0 μm.
According to JTT/1238-:
according to the technical indexes of JTG F40-2004 technical Specification for construction of asphalt pavement for road of traffic transportation department, the semi-flexible pavement of the embodiment is filled with the large-flow cement-based grouting material into the large-gap asphalt mixture, and the performance of the obtained semi-flexible pavement material is detected, and the result is as follows:
the performance test results of the above examples and comparative examples show that the 2h compressive strength of the grouting material for semi-flexible pavement doped with modified microbeads of the invention in the best example reaches more than 15MPa, and the grouting material has excellent early strength performance, and meanwhile, the 20min fluidity of the grouting material is within 15s, the grouting material has good fluidity and is easy to pour.
The cement-based grouting material for the large-flow-state semi-flexible pavement, which is prepared by the invention, is added with the modified microbeads which are independently developed and produced, so that the grouting material has good perfusability, the working performance and the mechanical property of the cement-based grouting material are greatly improved, the construction is convenient, the performance is excellent, the preparation cost is low, and the cement-based grouting material has important social significance.
Although some embodiments of the present invention have been disclosed, they are not intended to limit the present invention, and those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention, such as increasing or decreasing the amount of raw material components or process time, but without substantially affecting the product quality, such changes are also within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A large flow state cement-based grouting material for a semi-flexible pavement is characterized by comprising the following components in parts by weight: 35-60 parts of fast hardening sulphoaluminate cement, 15-40 parts of modified microspheres, 10-30 parts of fine aggregate, 0.01-0.3 part of early strength agent, 0.1-0.5 part of water reducing agent, 0.05-0.2 part of water retaining agent, 0.001-0.1 part of defoaming agent, 4-5.5 parts of expanding agent and 20-35 parts of water.
2. The high flow state cement-based grouting material as claimed in claim 1, which is composed of the following components in parts by weight: 50 parts of rapid hardening sulphoaluminate cement, 25 parts of modified microbeads, 20 parts of superfine quartz sand, 0.02 part of early strength agent, 0.3 part of water reducing agent, 0.08 part of water retaining agent, 0.1 part of defoaming agent, 4.5 parts of expanding agent and 30 parts of water.
3. The high flow regime cement-based grouting material according to claim 1 or 2, wherein: the modified microbead is a mixture obtained by mixing fly ash microbeads, a viscosity reducer and an anionic surfactant at a high speed; the viscosity reducer is polyethylene glycol with the molecular weight of 800-1200, and the anionic surfactant is sodium dodecyl benzene sulfonate, sodium dodecyl sulfonate or sodium dodecyl sulfate.
4. The high flow cement-based grouting material according to claim 3, wherein: the viscosity reducer is polyethylene glycol with the molecular weight of 1000, and the anionic surfactant is sodium dodecyl benzene sulfonate.
5. The high flow cement-based grouting material according to claim 3, wherein: the fly ash microbeads are spherical particles, and the particle size is 0.1-5.0 mu m.
6. The high flow cement-based grouting material according to claim 3, wherein: in the modified microbeads, the content of the fly ash microbeads is 85-95 wt%, the content of the viscosity reducer is 1-5 wt%, and the content of the anionic surfactant is 4-10 wt%.
7. The high flow cement-based grouting material according to claim 3, wherein: when the modified microspheres are prepared, the mixing speed is more than or equal to 2000r/min, preferably 2000-2500 r/min, and the mixing time is 15-20 min.
8. The high flow regime cement-based grouting material according to claim 1 or 2, wherein: the quick-hardening sulphoaluminate cement is quick-hardening early-strength sulphoaluminate cement with a strength grade of 42.5 or 52.5; the particle size of the superfine quartz sand is 100-200 meshes and SiO2Content ≥ 96 wt.%; the early strength agent is lithium carbonate or/and lithium chloride; the water reducing agent is a powdery water-reducing polycarboxylic acid water reducing agent or/and a low-air-entraining early-strength polycarboxylic acid water reducing agent; the water-retaining agent is low-viscosity cellulose ether or/and anionic polyacrylamide with the molecular weight of 800-1200 ten thousand; the defoaming agent is a powdery organic silicon or/and polyether modified polysiloxane defoaming agent; the expanding agent is a magnesium oxide expanding agent or/and a calcium sulphoaluminate expanding agent.
9. The method for preparing the high flow state cement-based grouting material for the semi-flexible pavement according to claim 1, which is characterized by comprising the following steps of: and (3) stirring all the materials except water at a low speed to uniformly mix the materials, then adding water, stirring at a low speed after adding, and stirring at a high speed to obtain the high-flow cement-based grouting material for the semi-flexible pavement.
10. The method of claim 9, wherein: and (2) stirring all the materials except water at a low speed for 2-3 min in a stirring pot with the rotating speed of 60-70 r/min, fully mixing all the materials, adding water at one time, stirring for 30-60 s at the rotating speed of 60-70 r/min after adding, and stirring for 3-5 min at the rotating speed of 1000-1200 r/min to obtain the high-flow cement-based grouting material for the semi-flexible pavement.
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| CN113816653A (en) * | 2021-10-13 | 2021-12-21 | 宁夏嘉惠道路资源再生利用有限公司 | Pouring type flexible pavement and preparation method thereof |
| CN113880535A (en) * | 2021-10-29 | 2022-01-04 | 沈阳建筑大学 | Sleeve grouting material for connecting low-temperature cement-based steel bars |
| CN115947578A (en) * | 2022-10-11 | 2023-04-11 | 扬州大学 | High-flow-state early-strength semi-flexible pavement grouting material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113816653A (en) * | 2021-10-13 | 2021-12-21 | 宁夏嘉惠道路资源再生利用有限公司 | Pouring type flexible pavement and preparation method thereof |
| CN113816653B (en) * | 2021-10-13 | 2022-05-24 | 宁夏嘉惠道路资源再生利用有限公司 | Pouring type flexible pavement and preparation method thereof |
| CN113880535A (en) * | 2021-10-29 | 2022-01-04 | 沈阳建筑大学 | Sleeve grouting material for connecting low-temperature cement-based steel bars |
| CN113880535B (en) * | 2021-10-29 | 2023-10-13 | 沈阳建筑大学 | Sleeve grouting material for connecting low-temperature cement-based steel bars |
| CN115947578A (en) * | 2022-10-11 | 2023-04-11 | 扬州大学 | High-flow-state early-strength semi-flexible pavement grouting material and preparation method thereof |
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