CN115231894A - Bi-component cement-based repair material for pit and groove diseases - Google Patents
Bi-component cement-based repair material for pit and groove diseases Download PDFInfo
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- CN115231894A CN115231894A CN202210846054.4A CN202210846054A CN115231894A CN 115231894 A CN115231894 A CN 115231894A CN 202210846054 A CN202210846054 A CN 202210846054A CN 115231894 A CN115231894 A CN 115231894A
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- emulsified asphalt
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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
- C04B28/34—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 cold phosphate binders
- C04B28/344—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 cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
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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
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention belongs to the field of pavement repair, and provides a bi-component cement-based repair material for pit and groove diseases, which comprises the following components in part by weight: type A powder material: 1-100 parts of B-type powder: 1-50 parts; the emulsified asphalt accounts for 15-30% of the total mass of the MPC, and the crushed stone accounts for 1.25-4 times of the total mass of the MPC; the A-type powder material comprises the following raw materials in parts by weight: dead roasting of magnesium oxide: 30-80 parts of borax: 5-15 parts of additive: 0-5 parts of standard sand: 0-20 parts of a solvent; the B type powder material consists of the following raw materials in parts by weight: ammonium dihydrogen phosphate: 10-50 parts of fly ash: 10 to 30 portions. According to the invention, the MPC material and the emulsified asphalt material are subjected to organic-inorganic compounding, the acid-base neutralization reaction of the MPC can consume a large amount of water in the emulsified asphalt and release reaction heat, the demulsification of the emulsified asphalt can be effectively accelerated, the emulsified asphalt can provide flexible bonding, the MPC material can provide rigid bonding, the composite material interacts to form a multiple bonding structure, and the mechanical property requirement of the repair material is met.
Description
Technical Field
The invention belongs to the technical field of pavement repair, and particularly relates to a novel bi-component cement-based repair material for pit and groove diseases.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The asphalt concrete pavement has the advantages of stable driving, comfort, low noise, convenient maintenance and repair, recycling and the like, and can be widely used in various highways and urban roads, especially high-grade roads, but along with the opening of road traffic, the pavement directly bears the comprehensive action of traffic load and natural environment, in addition, the quality of asphalt materials is uneven, the pavement is easy to damage, along with the increase of service life, after the materials are gradually aged, the internal structure of the materials is damaged under the action of water temperature, and the common early-stage damage phenomenon of asphalt is as follows: the running safety is seriously threatened by oil bleeding, waves, cracks, pits and the like. At present, the hot-mix asphalt mixture is mostly adopted for repairing pavement diseases such as pits and the like, but the materials and inorganic materials such as cement concrete and the like have poor interface bonding and inconsistent deformation, the hot-mix asphalt has large workload, and the heating is needed in the use process to cause larger energy loss. At present, cold-mix asphalt is adopted to repair small-scale diseases, and the time for opening traffic is long due to the limitation of emulsion breaking time, so that the research and development of a novel asphalt concrete pavement repair material which is fast in hardening, early in strength, good in interface bonding performance, green and environment-friendly is urgent, and the asphalt concrete pavement repair material has a very wide application prospect.
How to accelerate the demulsification speed of the emulsified asphalt and utilize the positive influence of the emulsified asphalt on the pavement, and the problem of quick repair of the asphalt pavement is that the early strength of the emulsified asphalt concrete is improved. Magnesium phosphate cement has been used in rapid pavement repair because of its advantages of rapid hardening, early strength, and strong binding ability.
Disclosure of Invention
In view of the above-mentioned disadvantages of the prior art, the present invention aims to provide a pavement damage repairing material which can solve the above-mentioned problems and has the performance advantages of short repairing time, excellent adhesive property and simple construction.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, there is provided a two-component cement-based repair material for pit diseases, comprising: type A powder material: 1-100 parts of B type powder: 1-50 parts; the emulsified asphalt accounts for 15-30% of the total mass of the MPC, and the crushed stone accounts for 1.25-4 times of the total mass of the MPC;
the A-type powder material comprises the following raw materials in parts by weight: dead burning of magnesium oxide: 30-80 parts of borax: 5-15 parts of additive: 0-5 parts of standard sand: 0-20 parts of a solvent;
the B-type powder material consists of the following raw materials in parts by weight: ammonium dihydrogen phosphate: 10-50 parts of fly ash: 10 to 30 portions.
The invention carries out organic-inorganic compounding on the magnesium phosphate cement and the emulsified asphalt, can effectively exert the advantages of materials and has engineering applicability.
The invention takes two main reactants of MPC material, namely magnesium oxide and ammonium dihydrogen phosphate, as main components of A, B powder and adds other auxiliary materials, then emulsified asphalt and water are mixed, and then fixed graded broken stone is added and mixed to synthesize concrete for repairing pit and groove diseases.
The second aspect of the invention provides a preparation method of a bi-component cement-based repair material for pit and groove diseases, which comprises the following steps:
respectively and uniformly mixing the A-type powder and the B-type powder, and sealing for later use;
uniformly mixing the A-type powder, the B-type powder and standard sand to obtain a solid mixture;
uniformly mixing emulsified asphalt and water to obtain a mixed solution;
and adding the solid mixture into the mixed solution, adding the broken stone, and uniformly mixing to obtain the composite material.
The invention has the advantages of
(1) The emulsified asphalt mixture solves the problems of complex field operation and large consumption of manpower and material resources of hot-mix asphalt, mainly adopts a paving mode on the field in the actual application process, does not need stirring equipment and large-scale construction equipment, saves energy, is green and environment-friendly, and is simple and convenient to construct.
(2) According to the invention, the MPC material and the emulsified asphalt material are subjected to organic-inorganic compounding, the acid-base neutralization reaction of the MPC can consume a large amount of water in the emulsified asphalt and release reaction heat, the demulsification of the emulsified asphalt can be effectively accelerated, the emulsified asphalt can provide flexible bonding, the MPC material can provide rigid bonding, the composite material interacts to form a multiple bonding structure, and the mechanical property requirement and the bonding property requirement of the repair material are met.
(3) The material has short setting time, the hardening time is controlled within 2 hours, the early strength is rapidly developed, the curing requirement is lower, the curing time is shorter, the traffic is opened quickly, and the influence on the traffic is smaller.
(4) The preparation method is simple, strong in practicability and easy to popularize.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
A novel bi-component cement-based repair material for pit and groove diseases comprises the following raw materials in parts by mass: type A powder material: 1-100 parts of B type powder: 1-50 parts;
furthermore, in the asphalt pavement repairing material, crushed stone is added according to the total mass of 1.25-4 times of MPC, the selected particle size of the crushed stone is smaller and the difference is smaller (refer to the particle size requirement of the crushed stone in the road maintenance standard), and the addition of the crushed stone is too small, so that the difference between the uniformity of the original asphalt pavement and the uniformity of a repairing area is too large, and the skid resistance of the pavement is poor; the crushed stone is too large in proportion, so that the crushed stone cannot be wrapped by the materials, the setting performance among aggregates is influenced, and the stone is obtained through tests, and the performance is excellent when the mass of the stone is 1.25-4 times that of the MPC.
The emulsified asphalt is added according to 15-30% of the total mass of the MPC (A/C = 15-30%), and the total water-cement ratio W/C = 0.15-0.30. The MPC powder cannot be completely wrapped due to too small amount of the emulsified asphalt, segregation occurs, the uniformity of the material is affected, the mechanical property and the setting time of the material are greatly reduced due to too large amount of the emulsified asphalt, the material loses the performance advantage, and the performance advantage of the composite material is obvious when the amount of the emulsified asphalt is between 15 and 30 percent through examination and examination of related documents and tests.
The A-type powder is prepared by the following steps of: 30-80 parts of borax: 5-15 parts of additive: 0-5 parts of standard sand: 0 to 20 portions of the raw materials;
the additive is prepared from the following components in percentage by weight: 0-10 parts of water reducing agent: 0 to 20 portions of the raw materials;
the defoaming agent adopts organic silicon powder, and the water reducing agent adopts one or more of a naphthalene water reducing agent and a polycarboxylic acid water reducing agent;
the B type powder material is prepared from ammonium dihydrogen phosphate: 10-50 parts of fly ash: 10-30 parts of a solvent;
the emulsified asphalt adopts slow-breaking quick-setting type cation emulsified asphalt, and the solid content is 50-60%;
the operation method of the novel bi-component cement-based repair material for the pit and groove diseases comprises the following steps of uniformly mixing the A-type powder according to a designed mixing proportion, and sealing for later use; then uniformly mixing the B-type powder according to the mixing proportion, and sealing for later use; when the pavement is repaired, uniformly mixing A, B material and a certain mass of standard sand, then mixing and stirring the weighed emulsified asphalt and water for 1-2 min, then uniformly pouring the mixed A, B material for about 1min, then adding gravel with a certain mass ratio, uniformly stirring, paving on the cleaned pavement to be repaired, tamping, compacting and paving the material, and then naturally curing for 2-5 hours.
The invention adds MPC into emulsified asphalt to form an organic-inorganic composite system, which can consume water in the emulsified asphalt by hydration of magnesium phosphate cement, and hydration heat released by hydration of cement can accelerate the emulsion breaking speed of the emulsified asphalt, and the emulsified asphalt can recover the original adhesive property after the emulsion breaking process and interacts with MPC material to form a semi-rigid gelled material between MPC material and emulsified asphalt, which can fully utilize and play the advantages of MPC cement material mechanical property coloring and good emulsified asphalt material flexibility, thus greatly expanding the application field of MPC material and emulsified asphalt single system and filling the blank in the field of rapid road repair material.
The present invention is described in further detail below with reference to specific examples, which should be construed as illustrative rather than restrictive.
In the following examples, the defoaming agent was silicone powder obtained from Su Bote New Material Co., ltd. Of Jiangsu, and the water reducing agent was polycarboxylate water reducing agent obtained from Su Bote New Material Co., ltd. Of Jiangsu. The thickening agent is powdery hydroxypropyl methyl cellulose, is purchased from Juyi chemical company Limited in Ningpo, and other raw materials are all commercial products.
The first embodiment is as follows: a novel bi-component cement-based repair material for pit and groove diseases is prepared from the following components in parts by mass: 78 parts of A-type powder, wherein the A-type powder comprises 55 parts of dead burned magnesia powder, 20 parts of fly ash, 10 parts of standard sand and 3 parts of an additive; 22 parts of B type powder, wherein the B type powder comprises 20 parts of Ammonium Dihydrogen Phosphate (ADP) powder and 2 parts of borax; 40 parts of cation emulsified asphalt with solid content of 60 percent is adopted, the water is added according to the theoretical water consumption W/C =0.18, the macadam is added according to 2.5 times of the total mass of the MPC, and the actual water consumption is the theoretical water consumption minus the water content of the emulsified asphalt; when the pavement is repaired, A, B powder is mixed uniformly, after dry mixing is carried out for 1min, emulsified asphalt and water are added into the mixed powder, after stirring is carried out for 3min, the mixture is poured on the cleaned pavement to be repaired, and natural curing is carried out for 2-3 hours.
Further, the additive comprises 1.5 parts of water reducing agent, 1.0 part of thickening agent and 0.5 part of defoaming agent.
Furthermore, after the material is paved, the setting and hardening time is about 45min, and the traffic can be opened after natural curing for 3h after the setting and hardening.
In the second embodiment, the specific implementation mode is different from the first embodiment only in the following material proportion, the operation steps and the material composition are basically consistent, and the following mass portion ratios are adopted: 72 parts of A-type powder, wherein the A-type powder comprises 50 parts of dead burned magnesia powder, 20 parts of fly ash, 15 parts of standard sand and 2 parts of an additive; 23 parts of B type powder, wherein the B type powder comprises 20 parts of Ammonium Dihydrogen Phosphate (ADP) powder and 3 parts of borax; 30 parts of cation emulsified asphalt with the solid content of 60 percent is adopted, the water is added according to the theoretical water consumption W/C =0.17, the actual water consumption is the theoretical water consumption minus the water content of the emulsified asphalt, and the crushed stone is added according to 1.25 times of the total mass of the MPC.
The additive comprises 1 part of water reducing agent, 0.8 part of thickening agent and 0.2 part of defoaming agent; the setting time of the embodiment is about 35min, and the natural curing is carried out for 3 h.
In a third embodiment, the specific implementation mode is different from the first embodiment only in the following material proportion, the operation steps and the material composition are basically consistent, and the following mass portion ratios are adopted: 62 parts of A type powder, which comprises 60 parts of dead burned magnesia powder, 10 parts of standard sand and 2 parts of an additive; 24 parts of B type powder, wherein the B type powder comprises 20 parts of Ammonium Dihydrogen Phosphate (ADP) powder and 4 parts of borax; 35 parts of cation emulsified asphalt with the solid content of 60 percent is adopted, the water is added according to the theoretical water consumption W/C =0.18, the actual water consumption is the theoretical water consumption minus the water content of the emulsified asphalt, and crushed stone is added according to 2.5 times of the total mass of the MPC.
The additive comprises 0.75 part of water reducing agent, 1 part of thickening agent and 0.25 part of defoaming agent; the setting time of the embodiment is about 45min, and the natural curing is carried out for 2 h.
In a fourth embodiment, the specific implementation mode is different from the first embodiment only in the following material proportion, the operation steps and the material composition are basically consistent, and the following mixture ratios in parts by mass are adopted: 52 parts of A type powder, which comprises 50 parts of dead burned magnesia powder, 20 parts of standard sand and 2 parts of an additive; 28 parts of B type powder, wherein the B type powder comprises 25 parts of Ammonium Dihydrogen Phosphate (ADP) powder and 3 parts of borax; 35 parts of cation emulsified asphalt with the solid content of 60% is adopted, the water is added according to the theoretical water consumption W/C =0.16, the actual water consumption is the theoretical water consumption minus the water content of the emulsified asphalt, and the macadam is added according to 4 times of the total mass of the MPC.
The additive comprises 1 part of water reducing agent, 1.5 parts of thickening agent and 0.3 part of defoaming agent; the setting time of the embodiment is about 60min, and the natural curing is carried out for 5 h.
In the fifth embodiment, the specific implementation mode is different from the first embodiment only in the following material proportion, the operation steps and the material composition are basically consistent, and the following mass portion ratios are adopted: 63 parts of A-type powder, which comprises 60 parts of dead-burned magnesia powder and 3 parts of an additive; 23 parts of B type powder, wherein the B type powder comprises 20 parts of Ammonium Dihydrogen Phosphate (ADP) powder and 3 parts of borax; 30 parts of cation emulsified asphalt with the solid content of 60 percent is adopted, the water is added according to the theoretical water consumption W/C =0.18, the actual water consumption is the theoretical water consumption minus the water content of the emulsified asphalt, and crushed stone is added according to 1.5 times of the total mass of the MPC.
The additive comprises 0.75 part of water reducing agent, 1 part of thickening agent and 0.25 part of defoaming agent; the setting time of the embodiment is about 33min, and the natural curing is carried out for 3 h.
The MPC-emulsified asphalt organic-inorganic composite materials prepared in examples 1-5 were tested for setting time and flexural and compressive strengths at different ages, and the results are shown in Table 1.
TABLE 1 repair materials Performance test results
According to the test data, the setting time of the material is controlled within 1h, the traffic can be completely opened after natural curing for 3h, the influence on the traffic is small, and the economic loss and potential safety hazards are greatly reduced; and the quick-hardening early-strength performance of the MPC material enables the MPC material to develop rapidly in strength within 1h, the performance requirement of an asphalt pavement on a repair material is met, the emulsified asphalt brings the improvement of the bonding strength to the MPC material after emulsion breaking, the composite material and the aggregate are not only bonded physically by the MPC material, but also can be organically bonded by the emulsified asphalt, the brittle failure of the MPC material is effectively reduced, and the emulsion breaking time of the emulsified asphalt material is also shortened. Therefore, the MPC-emulsified asphalt organic-inorganic composite material prepared by the invention meets the road requirement for rapidly repairing the road surface diseases, and can be applied to the simple and rapid repair of asphalt road surfaces.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A bi-component cement-based repair material for pit and pit diseases is characterized by comprising the following components: type A powder material: 1-100 parts of B type powder: 1-50 parts; the emulsified asphalt accounts for 15-30% of the total mass of the MPC, and the crushed stone accounts for 1.25-4 times of the total mass of the MPC;
the A-type powder material comprises the following raw materials in parts by weight: dead roasting of magnesium oxide: 30-80 parts of borax: 5-15 parts of additive: 0-5 parts of standard sand: 0-20 parts of;
the B-type powder material consists of the following raw materials in parts by weight: ammonium dihydrogen phosphate: 10-50 parts of fly ash: 10 to 30 portions.
2. The two-component cement-based repair material for pit diseases according to claim 1, wherein the additive is prepared from an antifoaming agent: 0-10 parts of water reducing agent: 0 to 20 portions.
3. The two-component cement-based repair material for pot holes according to claim 2, wherein the defoaming agent is silicone powder.
4. The two-component cement-based repair material for the pot hole disease according to claim 2, wherein the water reducing agent is a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.
5. The two-component cement-based repair material for pot-pit diseases according to claim 2, wherein the admixture further comprises a thickener.
6. The two-component cement-based repair material for pit and slot diseases according to claim 1, wherein the emulsified asphalt is slow-breaking quick-setting type cationic emulsified asphalt with a solid content of 50-60%.
7. A preparation method of a bi-component cement-based repair material for pit and pit diseases is characterized by comprising the following steps:
respectively and uniformly mixing the A-type powder and the B-type powder, and sealing for later use;
uniformly mixing the A-type powder, the B-type powder and standard sand to obtain a solid mixture;
uniformly mixing emulsified asphalt and water to obtain a mixed solution;
and adding the solid mixture into the mixed solution, adding the broken stone, and uniformly mixing to obtain the composite material.
8. The preparation method of the bi-component cement-based repair material for the pot hole diseases as claimed in claim 7, wherein the bi-component cement-based repair material is paved on a road surface to be repaired, and then naturally cured for 2-5 hours after the material is tamped, compacted and paved.
9. The method for preparing a two-component cement-based repair material for pit and pit diseases according to claim 7, wherein the specific conditions for mixing the emulsified asphalt with water are as follows: stirring for 1-2 min.
10. The preparation method of the two-component cement-based repair material for the pot hole disease according to claim 7, wherein the solid mixture is added to the mixed solution for a controlled time of 50 to 80 seconds.
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| CN202210846054.4A CN115231894A (en) | 2022-07-19 | 2022-07-19 | Bi-component cement-based repair material for pit and groove diseases |
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| CN202210846054.4A CN115231894A (en) | 2022-07-19 | 2022-07-19 | Bi-component cement-based repair material for pit and groove diseases |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115745564A (en) * | 2023-01-06 | 2023-03-07 | 重庆纽镁特科技有限公司 | Cold-mixed asphalt material and preparation method thereof |
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| CN111574186A (en) * | 2020-04-23 | 2020-08-25 | 河北建设集团股份有限公司 | Rapid repair material for bridge expansion joint and preparation method thereof |
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| CN102505601A (en) * | 2011-11-21 | 2012-06-20 | 重庆大学 | Fast repairing method for asphalt concrete pavement |
| CN103570334A (en) * | 2013-09-13 | 2014-02-12 | 长沙理工大学 | Quick cold-patch repair method for asphalt pavement, and application thereof |
| CN104692766A (en) * | 2015-02-11 | 2015-06-10 | 中国科学院合肥物质科学研究院 | Pavement and crack rapid-repairing material capable of being used in cold region and preparation method of pavement and crack rapid-repairing material |
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