CN109778657B - Quick maintenance method for cement pavement - Google Patents
Quick maintenance method for cement pavement Download PDFInfo
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- CN109778657B CN109778657B CN201910251331.5A CN201910251331A CN109778657B CN 109778657 B CN109778657 B CN 109778657B CN 201910251331 A CN201910251331 A CN 201910251331A CN 109778657 B CN109778657 B CN 109778657B
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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
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Abstract
The invention relates to the technical field of buildings and discloses a rapid maintenance method for a cement pavement. According to the invention, milling, slag cleaning, washing, wetting, pouring new cement adhesive cement, paving new repairing agent and plastic film for health maintenance are sequentially performed, so that not only can the consumable demand be reduced and the steps of a construction method be simplified, but also the time required for health maintenance can be greatly shortened, further the maintenance task can be rapidly completed, the purpose of rapidly recovering traffic is realized, and the travel of people and the development of national economic activities are greatly facilitated. In addition, the cement mucilage and the repairing agent adopted have the advantages of self-leveling property, high strength, quick molding, good freezing resistance, impermeability and wear resistance, and the like, and are convenient for practical popularization and application.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a rapid maintenance method for a cement pavement.
Background
The cement concrete pavement is a main form of the current pavement, and is inevitably damaged to different degrees under the repeated action of continuously increasing driving loads and the cyclic action of other various environments and human factors, and the damaged degree is gradually increased along with the continuous increase of the service time of the cement concrete pavement, and is mainly represented by broken plates, cracks, exposed bones, cracks, dislocation and the like, so that the damaged cement concrete pavement must be repaired in order to ensure the continuous safe operation of traffic. By comparing the related industry specifications and documents, the repair material for the cement concrete pavement maintenance engineering needs to have the strength reaching 70% of the original pavement design strength of the concrete within 24 hours, namely the compressive strength must reach 20MPa, the flexural tensile strength must reach 3.5MPa (original plate design strength is 5 MPa) or 3.15MPa (original plate design strength is 4.5 MPa), and the strength of the repair material must reach 100% of the original pavement design strength in open traffic, and meanwhile, the repair material has the characteristics of quick hardening, good wear resistance and durability, low shrinkage and micro expansion and the like.
The cement pavement maintenance steps described in the current technical specification JTJ 073.1-2001 (hereinafter referred to as specification) of highway cement concrete pavement maintenance are as follows: (1) After milling, slag removal and washing, brushing a layer of cement slurry with the same proportion as the repairing material on the new and old bonding surfaces; (2) Paving at least 80mm thick combined cement concrete, wherein the combined cement concrete is formed by mixing cement mixture (i.e. repairing material) doped with additives and asphalt thin-layer slurry sealing material; (3) fully vibrating and strickling; (4) And (3) immediately sprinkling water for preserving health for at least 14 days, and sprinkling water for 3-4 times per day. Therefore, the existing cement pavement maintenance method has the problems of large consumption, complex construction method, long time for curing and the like, is unfavorable for rapidly completing maintenance tasks and achieving the purpose of rapidly recovering traffic, and needs to be further improved.
Disclosure of Invention
The invention aims to solve the problems of large consumption, complex construction method, long time for curing and the like in the existing cement pavement maintenance method.
The technical scheme adopted by the invention is as follows:
a cement pavement quick maintenance method comprises the following steps:
s101, milling: milling the pavement to be maintained, wherein the milling depth is 20-25 mm;
s102, removing slag;
s103, washing;
s104, keeping the pavement moist for 4-6 hours;
s105, pouring and flattening a layer of cement adhesive cement with the thickness of 5-7 mm, wherein the cement adhesive cement is formed by mixing, by weight, 377-435 parts of Portland cement, 547-623 parts of graded river sand, 35-60 parts of stone powder, 27-32 parts of silica powder, 10.6-12 parts of fly ash, 0.1-2 parts of calcium formate, 0.2-6 parts of triisopropanolamine, 1.1-3 parts of alpha-sodium alkenyl sulfonate, 0.6-2 parts of polyvinyl alcohol, 1.4-2.5 parts of anhydrous calcium chloride and a proper amount of water;
s106, paving and strickling a layer of repairing agent with the thickness of 20-25 mm, wherein the repairing agent is formed by mixing, by weight, 320-450 parts of Portland cement, 324-417 parts of graded river sand, 170-260 parts of graded broken stone, 12.7-17 parts of silicon powder, 3.2-8 parts of fly ash, 0.1-2 parts of calcium formate, 0.2-7 parts of triisopropanolamine, 1.2-2.4 parts of alpha-alkenyl sodium sulfonate, 0.4-1.2 parts of polyvinyl alcohol, 1.2-2.4 parts of anhydrous calcium chloride and a proper amount of water;
s107, preserving the health for 3 days by adopting a mode of paving a plastic film;
s108, removing the plastic film.
Preferably, in said step S106, the vibration is scraped flat and tightly disabled using a scraper.
Preferably, after the step S108, the method further includes the following steps:
s109, curing for 4 days by adopting a water sprinkling mode.
Optimally, in the cement mortar, the grain size specification of the graded river sand is between 0.15 and 0.3 mm.
Optimally, in the cement mortar, the stone powder is basalt stone powder and the particle size specification is 0.075mm.
Optimally, in the repairing agent, the graded river sand is formed by mixing, by weight, 170-227 parts of first-region graded river sand with the grain size specification of 1.18-4.75 mm, 130-150 parts of second-region graded river sand with the grain size specification of 0.3-1.18 mm and 24-40 parts of third-region graded river sand with the grain size specification of 0.15-0.3 mm.
Optimally, in the repairing agent, the graded broken stone is basalt broken stone, and the grain size specification is between 5 and 12 mm.
Preferably, in the cement paste or the repairing agent, the grain size specification of the silica powder is between 74 and 125 um.
Preferably, in the cement paste or the repairing agent, the particle size specification of the fly ash is between 10 and 40 um.
Preferably, in the cement paste or the repair agent, the Portland cement is P.O.42.5 Portland cement.
The beneficial effects of the invention are as follows:
(1) The invention provides a novel rapid maintenance method for cement pavement, which sequentially comprises milling, slag removal, washing, wetting, pouring new cement mortar, paving new repairing agent and plastic film for maintenance, so that the material consumption is reduced, the steps of a construction method are simplified, the time required for maintenance is greatly shortened, the maintenance task can be rapidly completed, the purpose of rapidly recovering traffic is realized, and the travel of people and the development of national economic activities are greatly facilitated;
(2) The cement mucilage and the repairing agent adopted have the advantages of self-leveling property, high strength, quick forming, good freezing resistance, seepage resistance, wear resistance and the like, and are convenient for practical popularization and application.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of the method for rapidly maintaining a cement pavement.
Detailed Description
The invention is further described with reference to the drawings and specific examples. It should be noted that the description of these examples is for aiding in understanding the present invention, but is not intended to limit the present invention. Specific structural and functional details disclosed herein are merely representative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: the terms "/and" herein describe another associative object relationship, indicating that there may be two relationships, e.g., a/and B, may indicate that: the character "/" herein generally indicates that the associated object is an "or" relationship.
It will be understood that when an element is referred to as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe relationships between elements (e.g., "between … …" pair "directly between … …", "adjacent" pair "directly adjacent", etc.) should be interpreted in a similar manner.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates to the contrary. It will be further understood that the terms "comprises," "comprising," "includes," "including" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, and do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may in fact be executed substantially concurrently or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
In the following description, specific details are provided to provide a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, a system may be shown in block diagrams in order to avoid obscuring the examples with unnecessary detail. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail in order to avoid obscuring the example embodiments.
Example 1
As shown in fig. 1, the method for rapidly repairing a cement pavement provided in this embodiment includes the following steps.
S101, milling: milling the pavement to be maintained, wherein the milling depth is 20-25 mm.
In the step S101, an existing pavement milling machine may be used to accurately mill the pavement to be repaired (i.e., the cement pavement with the problems of broken plates, cracks, open bones, chipping, dislocation, etc.).
S102, removing slag.
In the step S102, the road surface just milled may be subjected to a slag removal process using an existing road surface slag remover.
S103, washing.
In said step S103, the road surface may be rinsed using a high-pressure water gun.
S104, keeping the pavement moist for 4-6 hours.
In the step S104, wetting means that the water content of the road surface is between 12% and 15% or the relative humidity of the road surface is between 40% and 60%. The road surface can be touched by hands during judgment, and the road surface can be judged to be in a wet state when the road surface has obvious wet feeling.
S105, pouring and spreading a cement adhesive cement with the thickness of 5-7 mm, wherein the cement adhesive cement is prepared from 377-435 parts of silicate cement (silicate cement clinker mainly containing calcium silicate, limestone or granulated blast furnace slag below 5%, and a proper amount of gypsum) and 547-623 parts of river sand and 35-60 parts of stone powder according to parts by weight27 to 32 parts of silica powder, 10.6 to 12 parts of fly ash (which is fine ash collected from flue gas after coal combustion and is generally main solid waste discharged from coal-fired power plants), 0.1 to 2 parts of calcium formate (also called calcium formate, the molecular formula is C) 2 H 2 0 4 Ca with molecular weight of 130, calcium formate liberates formic acid through biochemical action in animal body, effectively reduces pH value in gastrointestinal tract, plays a role in maintaining proper acid in intestinal tract, and is formed by mixing 0.2-6 parts of triisopropanolamine, 1.1-3 parts of alpha-alkenyl sodium sulfonate, 0.6-2 parts of polyvinyl alcohol, 1.4-2.5 parts of anhydrous calcium chloride (also called ice calcium, commonly used as drying agent, refrigerant, building antifreezing agent, road dust collector, antifogging agent, fabric fire retardant, food preservative, and the like) and a proper amount of water. The cement adhesive cement with the formula can replace cement slurry, is only required to be mixed with a proper amount of water and then is coated or scraped to be coated between new and old concrete interfaces by 5-7 mm, is easy to operate and master, can effectively increase the interfacial adhesion, reduces the thickness and the dosage of upper repair materials, and effectively ensures the effect of maintenance engineering.
In the cement paste, the mixing amount of water is preferably 10-17% of the total weight of the dry mixture (namely, the dry mixture formed by mixing silicate cement, graded river sand, stone powder, silica fume, fly ash, calcium formate, triisopropanolamine, alpha-sodium alkenyl sulfonate, polyvinyl alcohol, anhydrous calcium chloride and the like): when a test piece is molded in a laboratory, the optimal mixing amount of water is 12% of the total weight of the dry-type mixture; when field test is carried out in the open air, the best mixing amount of water is 14-15% of the total weight of the dry-type mixture by using a forced mixing cylinder with the rotating speed of 45-57 r/min, wherein the quality of the water meets the requirement of the Specification on the cement concrete mixing water. In addition, the portland cement is preferably p.o.42.5 portland cement; the grading river sand is preferably third-region grading river sand with the grain size specification of 0.15-0.3 mm; the stone powder is preferably basalt stone powder with the particle size specification of 0.075 mm; the silicon powder is preferably ultrafine silicon powder with the particle size specification of 74-125 um; the fly ash is preferably ultrafine fly ash with specification and particle size of 10-40 um.
S106, paving and strickling a layer of repairing agent with the thickness of 20-25 mm, wherein the repairing agent is formed by mixing, by weight, 320-450 parts of Portland cement, 324-417 parts of graded river sand, 170-260 parts of graded broken stone (namely a mixture consisting of aggregates with different particle sizes, when the grading meets the specification of technical specifications), 12.7-17 parts of silica powder, 3.2-8 parts of fly ash, 0.1-2 parts of calcium formate, 0.2-7 parts of triisopropanolamine, 1.2-2.4 parts of alpha-alkenyl sodium sulfonate, 0.4-1.2 parts of polyvinyl alcohol, 1.2-2.4 parts of anhydrous calcium chloride and a proper amount of water.
In the step S106, it is preferable to use a doctor bar for leveling and strictly prohibiting the vibration because the total thickness of the cement paste and the healer is only 25 to 32mm, the layer structure is thin, and the vibration easily causes segregation of materials. In the repairing agent, the mixing amount of water is preferably 7-15% of the total weight of the dry mixture (namely, the dry mixture formed by mixing Portland cement, graded river sand, graded broken stone, silica fume, fly ash, calcium formate, triisopropanolamine, alpha-alkenyl sodium sulfonate, polyvinyl alcohol, anhydrous calcium chloride and the like): when a test piece is molded in a laboratory, the optimal mixing amount of water is 9% of the total weight of the dry-type mixture; when field test is carried out in the open air, the best mixing amount of water is 10-12% of the total weight of the dry-type mixture by using a forced mixing cylinder with the rotating speed of 45-57 r/min, wherein the quality of the water meets the requirement of the Specification on the cement concrete mixing water. In addition, the portland cement is preferably p.o.42.5 portland cement; the grading river sand is preferably formed by mixing, in parts by weight, 170-227 parts of first-region grading river sand with the particle size specification of 1.18-4.75 mm, 130-150 parts of second-region grading river sand with the particle size specification of 0.3-1.18 mm and 24-40 parts of third-region grading river sand with the particle size specification of 0.15-0.3 mm; the graded broken stone is basalt broken stone with the grain size specification of 5-12 mm; the silicon powder is preferably ultrafine silicon powder with the particle size specification of 74-125 um; the fly ash is preferably ultrafine fly ash with specification and particle size of 10-40 um.
According to the detection report (reference standard: GB/T50082-2009, GB/T17671-1999) made by the Heilongjiang province cold region construction engineering quality detection center on the dry repairing agent with sample number of 2018-AZL-50 (namely, 50 jin of dry mixture in bags), the following repairing agent detection report table shown in Table 1 can be referred to:
TABLE 1 repair agent test report Table
In table 1 above: the early-stage anti-cracking test pieces are square-disk test pieces, are formed by pouring steel molds with the sizes of 800mm, 600mm and 100mm and provided with 7 crack inducers, wherein one group of the early-stage anti-cracking test pieces is provided with 2 test pieces, and the arithmetic average value of the cracking areas of the 2 test pieces is used as a measured value of the average cracking area of the test pieces; the compression-resistant and fracture-resistant test pieces are cube test pieces with the dimensions of 150mm and a group of 3 test pieces, and each compression-resistant test point is at 2 positions. As shown in Table 1, the strength of the repaired pavement can be extremely quickly increased to 70% of the designed strength of the concrete pavement (i.e., the compressive strength is increased to 50MPa or more) within 24 hours by spreading the repairing agent.
S107, preserving the health for 3 days by paving a plastic film.
In the step S107, since a sufficient amount of water is mixed with the cement paste and the repairing agent, the curing can be performed without watering.
S108, removing the plastic film.
After the step S108 (i.e. after 3 days of health maintenance), the traffic can be recovered, and the following steps can be further included under the condition that traffic is not affected after the vehicle is passed: s109, curing for 4 days by adopting a water sprinkling mode, and curing is unnecessary after that.
Compared with the existing cement pavement maintenance method, the cement pavement rapid maintenance method provided by the embodiment and described in the previous steps S101 to S108 and S109 has the following advantages: (1) the consumable demand is reduced: the new method only needs to spread cement mucilage with the thickness of 5-7 mm and repairing agent with the thickness of 20-25 mm, which is far less than that of cement concrete with the thickness of at least 80mm required by the Specification; (2) the steps of the method are simplified: the new method does not need vibration and early watering health maintenance links; (3) shortens the time required for health preservation: the new method can restore the traffic of the cement pavement after 3 days of the health maintenance, and the later water sprinkling health maintenance only needs 4 days, which is far less than the water sprinkling health maintenance for 14 days required by the Specification; (4) The cement mucilage and the repairing agent adopted have the advantages of self-leveling property, high strength, quick forming, good freezing resistance, seepage resistance, wear resistance and the like, and are convenient for practical popularization and application.
In summary, the cement pavement rapid maintenance method provided by the embodiment has the following technical effects:
(1) The embodiment provides a novel rapid maintenance method for cement pavement, which comprises the steps of milling, slag removal, washing, wetting, pouring new cement mucilage, paving new repairing agent and plastic film for health maintenance in sequence, so that the material consumption is reduced, the steps of a construction method are simplified, the time required for health maintenance is greatly shortened, the maintenance task can be further rapidly completed, the purpose of rapidly recovering traffic is realized, and the travel of people and the development of national economic activities are greatly facilitated;
(2) The cement mucilage and the repairing agent adopted have the advantages of self-leveling property, high strength, quick forming, good freezing resistance, seepage resistance, wear resistance and the like, and are convenient for practical popularization and application.
Example two
This example provides a formulation for the further preferred component amounts of the cement paste described in example one, namely: the cement is prepared by mixing, by weight, 383-428 parts of Portland cement, 556-610 parts of graded river sand, 38-56 parts of stone powder, 27.5-31 parts of silica powder, 10.9-11.8 parts of fly ash, 0.3-1.6 parts of calcium formate, 0.8-5.0 parts of triisopropanolamine, 1.3-2.7 parts of alpha-sodium alkenyl sulfonate, 0.9-1.9 parts of polyvinyl alcohol, 1.5-2.4 parts of anhydrous calcium chloride and a proper amount of water.
The technical effects of the present embodiment can be directly derived based on the beneficial effects of the first embodiment, and will not be described herein.
Example III
This example provides a formulation for the further preferred component amounts of the cement paste described in example two, namely: the cement is prepared by mixing 394-420 parts of Portland cement, 570-598 parts of graded river sand, 45-52 parts of stone powder, 28-31 parts of silica powder, 11-11.5 parts of fly ash, 0.4-1.2 parts of calcium formate, 1.8-4.4 parts of triisopropanolamine, 1.6-2.5 parts of alpha-sodium alkenyl sulfonate, 1.0-1.7 parts of polyvinyl alcohol, 1.7-2.3 parts of anhydrous calcium chloride and a proper amount of water according to parts by weight.
The technical effects of the present embodiment can be directly derived based on the beneficial effects of the first embodiment, and will not be described herein.
Example IV
This example provides a formulation for the further preferred component amounts of the cement paste described in example three, namely: the cement is prepared by mixing, by weight, 401-412 parts of Portland cement, 578-592 parts of graded river sand, 47-50 parts of stone powder, 28.5-30 parts of silica powder, 11.1-11.4 parts of fly ash, 0.5-0.7 part of calcium formate, 2.9-3.3 parts of triisopropanolamine, 1.8-2.4 parts of alpha-sodium alkenyl sulfonate, 1.2-1.5 parts of polyvinyl alcohol, 1.9-2.2 parts of anhydrous calcium chloride and a proper amount of water.
The technical effects of the present embodiment can be directly derived based on the beneficial effects of the first embodiment, and will not be described herein.
Example five
This example provides a formulation for the further preferred component amounts of the cement paste described in example four, namely: the cement mortar is prepared by mixing 406 parts of Portland cement, 585 parts of graded river sand, 48 parts of stone powder, 29.5 parts of silicon powder, 11.3 parts of fly ash, 0.6 part of calcium formate, 3.1 parts of triisopropanolamine, 2.1 parts of alpha-sodium alkenyl sulfonate, 1.3 parts of polyvinyl alcohol, 2.0 parts of anhydrous calcium chloride and a proper amount of water according to parts by weight.
The technical effects of the present embodiment can be directly derived based on the beneficial effects of the first embodiment, and will not be described herein.
Example six
This example provides a formulation for the further preferred amounts of the components of the patch described in example one, namely: the cement mortar is prepared by mixing 354-423 parts of Portland cement, 348-402 parts of graded river sand, 207-238 parts of graded broken stone, 13.5-16.2 parts of silicon powder, 4.5-7.2 parts of fly ash, 0.3-1.8 parts of calcium formate, 0.6-6.2 parts of triisopropanolamine, 1.3-2.2 parts of alpha-sodium alkenyl sulfonate, 0.5-1.0 parts of polyvinyl alcohol, 1.4-2.1 parts of anhydrous calcium chloride and a proper amount of water according to parts by weight.
The technical effects of the present embodiment can be directly derived based on the beneficial effects of the first embodiment, and will not be described herein.
Example seven
This example provides a formulation for the further preferred amounts of the components of the healant described in example six, namely: the cement mortar is prepared by mixing 378-405 parts of Portland cement, 362-394 parts of graded river sand, 210-232 parts of graded broken stone, 13.9-15.4 parts of silicon powder, 5.3-6.2 parts of fly ash, 0.5-1.6 parts of calcium formate, 0.3-5.1 parts of triisopropanolamine, 1.5-2.0 parts of alpha-sodium alkenyl sulfonate, 0.6-0.9 part of polyvinyl alcohol, 1.5-1.9 parts of anhydrous calcium chloride and a proper amount of water according to parts by weight.
The technical effects of the present embodiment can be directly derived based on the beneficial effects of the first embodiment, and will not be described herein.
Example eight
This example provides a formulation for the further preferred amounts of the components of the patch described in example seven, namely: the cement is prepared by mixing 380-392 parts of silicate cement, 366-378 parts of graded river sand, 212-224 parts of graded broken stone, 14.2-15.1 parts of silicon powder, 5.5-5.9 parts of fly ash, 0.9-1.3 parts of calcium formate, 3.3-4.0 parts of triisopropanolamine, 1.7-1.9 parts of alpha-sodium alkenyl sulfonate, 0.7-0.9 part of polyvinyl alcohol, 1.7-1.9 parts of anhydrous calcium chloride and a proper amount of water according to parts by weight.
The technical effects of the present embodiment can be directly derived based on the beneficial effects of the first embodiment, and will not be described herein.
Example nine
This example provides a formulation for the further preferred amounts of the components of the patch described in example eight, namely: according to the weight parts, the cement mortar is prepared by mixing 385 parts of silicate cement, 370 parts of graded river sand, 215 parts of graded broken stone, 14.9 parts of silicon powder, 5.6 parts of fly ash, 1.1 parts of calcium formate, 3.6 parts of triisopropanolamine, 1.8 parts of alpha-sodium alkenyl sulfonate, 0.8 part of polyvinyl alcohol, 1.8 parts of anhydrous calcium chloride and a proper amount of water.
The technical effects of the present embodiment can be directly derived based on the beneficial effects of the first embodiment, and will not be described herein.
The invention is not limited to the alternative embodiments described above, but any person may derive other various forms of products in the light of the present invention. The above detailed description should not be construed as limiting the scope of the invention, which is defined in the claims and the description may be used to interpret the claims.
Claims (8)
1. The rapid maintenance method for the cement pavement is characterized by comprising the following steps of:
s101, milling: milling the pavement to be maintained, wherein the milling depth is 20-25 mm;
s102, removing slag;
s103, washing;
s104, keeping the pavement moist for 4-6 hours;
s105, pouring and flattening a layer of cement adhesive cement with the thickness of 5-7 mm, wherein the cement adhesive cement is formed by mixing, by weight, 377-435 parts of Portland cement, 547-623 parts of graded river sand, 35-60 parts of stone powder, 27-32 parts of silica powder, 10.6-12 parts of fly ash, 0.1-2 parts of calcium formate, 0.2-6 parts of triisopropanolamine, 1.1-3 parts of alpha-sodium alkenyl sulfonate, 0.6-2 parts of polyvinyl alcohol, 1.4-2.5 parts of anhydrous calcium chloride and a proper amount of water;
s106, paving and strickling a repairing agent with the thickness of 20-25 mm, wherein the repairing agent is formed by mixing, by weight, 320-450 parts of Portland cement, 324-417 parts of graded river sand, 170-260 parts of graded broken stone, 12.7-17 parts of silicon powder, 3.2-8 parts of fly ash, 0.1-2 parts of calcium formate, 0.2-7 parts of triisopropanolamine, 1.2-2.4 parts of alpha-alkenyl sodium sulfonate, 0.4-1.2 parts of polyvinyl alcohol, 1.2-2.4 parts of anhydrous calcium chloride and a proper amount of water;
s107, preserving the health for 3 days by adopting a mode of paving a plastic film;
s108, removing the plastic film;
the step S108 further includes the following steps: s109, adopting a sprinkling mode to preserve health for 4 days;
in the cement paste or the repairing agent, the Portland cement is P.O.42.5 Portland cement;
the compressive strength of the repaired pavement can reach more than 50MPa within 24 hours very quickly by paving the repairing agent.
2. A method of rapid maintenance of a cementitious pavement as set forth in claim 1, wherein in said step S106, the use of a scraping bar is used to scrape and strictly inhibit vibration.
3. The method for rapidly repairing a cement pavement according to claim 1, wherein the size specification of the graded river sand in the cement mortar is 0.15-0.3 mm.
4. A method of rapid maintenance of a cementitious slurry according to claim 1 wherein in the cementitious slurry the stone powder is basalt stone powder and has a particle size of 0.075mm.
5. The rapid maintenance method of a cement pavement according to claim 1, wherein in the repairing agent, 170-227 parts by weight of first-region graded river sand with a particle size specification of 1.18-4.75 mm, 130-150 parts by weight of second-region graded river sand with a particle size specification of 0.3-1.18 mm and 24-40 parts by weight of third-region graded river sand with a particle size specification of 0.15-0.3 mm are mixed.
6. The rapid maintenance method of a cement pavement according to claim 1, wherein the repairing agent comprises basalt crushed stone with a grain size of 5-12 mm.
7. The method for rapidly repairing a cement pavement according to claim 1, wherein the silica powder has a particle size of 74-125 μm in the cement paste or the repairing agent.
8. The method for rapidly repairing a cement pavement according to claim 1, wherein the size of the fly ash in the cement paste or the repairing agent is 10-40 μm.
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