CN117024081A - Cement asphalt concrete, preparation method and method for repairing broken holes in wet pavement - Google Patents

Cement asphalt concrete, preparation method and method for repairing broken holes in wet pavement Download PDF

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Publication number
CN117024081A
CN117024081A CN202311033517.6A CN202311033517A CN117024081A CN 117024081 A CN117024081 A CN 117024081A CN 202311033517 A CN202311033517 A CN 202311033517A CN 117024081 A CN117024081 A CN 117024081A
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China
Prior art keywords
cement
asphalt
aggregate
asphalt concrete
concrete
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CN202311033517.6A
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Chinese (zh)
Inventor
吕正宗
钟眀仁
张峰宁
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Shaoguan University
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Shaoguan University
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Priority to CN202311033517.6A priority Critical patent/CN117024081A/en
Publication of CN117024081A publication Critical patent/CN117024081A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075Uses not provided for elsewhere in C04B2111/00 for road construction
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/72Repairing or restoring existing buildings or building materials
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use 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 relates to cement asphalt concrete, a preparation method and a method for repairing broken holes on a wet pavement. Firstly mixing quick-cracking cationic emulsified asphalt with naphthalene sulfonic acid formaldehyde condensate sodium salt aqueous solution, then adding silicate cement and auxiliary agent, continuously mixing and stirring uniformly, finally adding aggregate, uniformly mixing and obtaining the cement asphalt concrete. The invention overcomes the problem of emulsion breaking stability of emulsion when the emulsified asphalt is mixed with cement, greatly improves the adding proportion of cement in the mixture, enhances the strength of materials, improves the water resistance of cement asphalt concrete, is beneficial to filling repair materials in wet asphalt concrete pavement and rapidly generating strength, is beneficial to rapidly opening vehicles, can maintain the smoothness of vehicle flows and ensures the safety of passers-by.

Description

Cement asphalt concrete, preparation method and method for repairing broken holes in wet pavement
Technical Field
The invention relates to the technical field of cement asphalt concrete, in particular to cement asphalt concrete, a preparation method and a method for repairing holes on wet pavement.
Background
The eastern China and the south China are located in the tropical and subtropical climates, plum rain is generated in the spring and summer alternation, heavy rain caused by typhoons is generated in the summer, seasonal rain caused by northeast monsoon is generated in the winter, and the land is rainy. The asphalt concrete pavement is rolled by overweight vehicles in the rainfall process, so that the asphalt and aggregate bonding interface of the asphalt concrete is stripped, threshing is further carried out, the threshing condition extends downwards and around, and then pavement pits are formed. If cracks are formed in the joint of the block joint of the cement concrete pavement, rainwater seeps downwards along the joint during rainy season, so that the roadbed is softened and mud water is formed, and after dynamic loading and rolling of wheels, the mud water under the cement concrete pavement is pumped out of the pavement, so that the pavement is partially emptied under the cement concrete pavement. The part of the upper plate which is left blank is repeatedly rolled by wheels, cracks are quickly generated, then fracture and continuous sinking are generated, and thus pits are generated on the cement concrete plate surface. The pits cause safety threat to passing vehicles, and the light persons cause damage to vehicle shock absorbers or tires; heavy persons cause the vehicle to run away, thereby causing injury. The materials commonly used for repairing the pavement at present are normal-temperature asphalt concrete, hot-mix asphalt concrete, resin asphalt concrete and the like. The normal temperature asphalt concrete and the hot mix asphalt concrete are mutually exclusive with water due to the lipophilicity of asphalt material characteristics, so that the repairing effect on a wet surface is poor; resin asphalt coagulation cannot be promoted because of high unit price, but all three have limitations that require construction on dry surfaces.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide cement asphalt concrete, a preparation method and a method for repairing a broken hole on a wet pavement, which overcome the problem of emulsion breaking stability when emulsified asphalt is mixed with cement, greatly improve the adding proportion of cement in the mixture, strengthen the strength of materials, improve the water resistance of the cement asphalt concrete, facilitate filling repairing materials on the wet asphalt concrete pavement and rapidly generating strength, facilitate rapid vehicle opening and closing, and maintain the smoothness of traffic flow and ensure the safety of passers-by.
The technical aim of the invention is realized by the following technical scheme:
the cement asphalt concrete comprises the following raw materials:
quick-cracking cationic emulsified asphalt, P.I type silicate cement, an auxiliary agent, naphthalene sulfonic acid formaldehyde condensate sodium salt aqueous solution and aggregate; wherein the auxiliary agent is an accelerator and/or an early strength agent.
In one embodiment, the aggregate comprises one or more of AC-25, AC-20 and AC-10 graded aggregates.
In one embodiment, the rapid-cracking cationic emulsified asphalt, the silicate cement, the auxiliary agent and the sodium salt aqueous solution of the naphthalene sulfonic acid formaldehyde condensate are mixed to form cement asphalt cement, and the cement asphalt cement and the aggregate are proportioned as follows, calculated by the mass percent of the cement asphalt concrete as a whole:
when AC-25 aggregate is adopted, the cement asphalt cement is 17-19%, and the aggregate is 81-83%;
when AC-20 aggregate is adopted, the cement asphalt cement is 17-19%, and the aggregate is 81-83%;
when AC-10 aggregate is used, the cement asphalt cement is 19-21% and the aggregate is 79-81%.
In one embodiment, the weight percentage of the cement asphalt concrete is calculated;
when AC-25 aggregate is adopted, in the cement asphalt cement, the emulsified asphalt is 8.9-9.9%, the silicate cement is 8.0-8.9%, and the SNFC solution is 0.156-0.173%;
when AC-20 aggregate is adopted, in the cement asphalt cement, the emulsified asphalt is 8.9-9.9%, the silicate cement is 8.0-8.9%, and the SNFC solution is 0.156-0.173%;
when AC-10 aggregate is used, in the cement asphalt cement, the emulsified asphalt is 9.9-10.8%, the silicate cement is 8.9-9.7%, and the SNFC solution is 0.173-0.189%.
In one embodiment, the quick-splitting cationic emulsified asphalt is PC-1 quick-splitting cationic emulsified asphalt.
The preparation method of the cement asphalt concrete comprises the following steps:
firstly mixing quick-cracking cationic emulsified asphalt with naphthalene sulfonic acid formaldehyde condensate sodium salt aqueous solution, then adding silicate cement and auxiliary agent, continuously mixing and stirring uniformly, finally adding aggregate, uniformly mixing and obtaining the cement asphalt concrete.
In one embodiment, the steps are as follows:
(1) The SNFC solution is added into the emulsified asphalt and stirred until the visual mixture is uniform.
(2) And standing the ready-mixed slurry.
(3) Adding silicate cement and accelerator (or early strength agent) into the slurry, and stirring until the visual mixture is uniform to obtain cement asphalt cement.
(4) And adding the fine aggregate into the cement asphalt cement slurry, uniformly mixing, and then adding the coarse aggregate, and uniformly mixing.
(5) The mixture was stirred until visually homogeneous.
A method for repairing a hole on a wet road surface uses the cement asphalt concrete in the repair of the wet road surface.
In summary, the invention has the following beneficial effects:
the invention utilizes the characteristic that cement can generate hydration with emulsified asphalt, and is assisted with admixture for quick setting or early strength of cement, so that cement asphalt cement is quickly hardened to generate strength, and cement asphalt concrete with enough strength is formed by solidifying aggregate.
Drawings
FIG. 1 is a most preferred preparation scheme of the present invention;
FIG. 2 is a schematic diagram showing the comparison of the adhesion tendency of the present invention to wet road surfaces with existing asphalt concrete road repair materials;
fig. 3 is a schematic illustration of repairing a hole in a wet road surface.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
It should be noted that the terms "upper", "lower", and the like referred to herein are all used for convenience of description only and should not be construed as limiting the technical solution.
The conventional cement asphalt concrete adopts slow-cracking emulsified asphalt, water, cement and aggregate, firstly, the cement, the aggregate and the water are mixed and moistened, and then the mixture is mixed with the emulsified asphalt to form the asphalt concrete. The mixing mode can lead the water content of the cement asphalt concrete to be too high, so that after the concrete is spread and paved, the continuous pressing and the final pressing can be carried out after the free water in the cement asphalt concrete is secreted and the cement is initially set. The operation procedure violates the regulations of GB 50204-2019 'inspection and acceptance Specification of construction quality of concrete structure engineering', and external force disturbance is not applied to cement concrete after the cement concrete is initially set. The cement asphalt concrete developed before China needs to wait for bleeding to be completed, so that pavement paving operation cannot be continuous, and continuous pressing and final pressing are performed after cement is initially set, thereby violating the regulations of national standard. The prior cement asphalt concrete cannot meet the practical requirements all the time in China because of the factors, the material composition and the production technology.
The invention provides novel cement asphalt concrete, which comprises the following raw materials:
quick-cracking cationic emulsified asphalt, P.I type silicate cement, an auxiliary agent, sodium salt (Sulphonated Naphthalene Formaldehyde Condensates, SNFC) aqueous solution of naphthalene sulfonic acid formaldehyde condensate and aggregate;
wherein the auxiliary agent is an accelerator and/or an early strength agent.
The rapid-cracking cationic emulsified asphalt is mixed with the SNFC solution to increase the stability of the emulsified asphalt (namely the rapid-cracking cationic emulsified asphalt) and inhibit the demulsification reaction when the emulsified asphalt and the silicate cement are directly mixed, because once the demulsification reaction occurs to the emulsified asphalt, asphalt microcells in the emulsified asphalt can be agglomerated and mixed with cement to form high-viscosity cement, so that the high-viscosity cement is lost, the SNFC can not only increase the stability of the emulsified asphalt, but also reduce the viscosity of the mixed slurry, and the good workability is maintained when the mixed slurry and the aggregate are mixed.
In the invention, the quick-cracking type cationic emulsified asphalt is a ready-made product in the market, preferably, the quick-cracking type cationic emulsified asphalt is PC-1, the asphalt content is about 50 percent, and the asphalt viscosity meets AH-70 and AH-90 standard requirements of Q/SHR003-1998 (No. 1) of medium petrochemical group company and Q/SHR004-1998 (No. 2) of medium petrochemical group company.
The Portland cement of the invention selects P.I type, strives for the generation of early strength of cement, and P.II, P. O, P. S, P. P, P.F and P.C types are not recommended. The cement of the types is respectively added with stone powder, mineral powder and various pozzolanic materials, and the pozzolanic materials need to react with calcium hydroxide and water of cement hydrate in alkaline environment to produce the adhesive with beneficial strength. In the mixture of the invention, however, the pozzolanic material may be directly coated with asphalt cement during mixing, and may not produce a gel of beneficial strength, directly as a filler, severely degrading the strength of the mixture after hardening, thus suggesting the use of Portland cement type P.I.
The accelerator or the early strength agent is aimed at promoting the hydration of cement, and all currently used products are commercial products in the market, and various manufacturers can provide recommended use amount, and the use amount can be adjusted according to actual requirements.
The cured product content of the sodium salt aqueous solution of naphthalene sulfonic acid formaldehyde condensate was about 30%. The aqueous solution of sodium salt of formaldehyde naphthalene sulfonate condensate in the art provides a well-foamed solvent when shipped to the manufacturer, at a concentration of about 30% solids, which is commonly known in the industry. If powder is purchased, the concentration of the self-infusing solution is not 30%, and the ratio is adjusted according to the actual material property.
The aggregate of the invention adopts three kinds of aggregate which accords with the three kinds of gradations of AC-25, AC-20 and AC-10 of JTGF40-2019 (highway asphalt pavement construction technical Specification), and the concrete is shown in the following table 1.
TABLE 1 percent by mass (%)
Based on the raw materials, the cement asphalt cement mortar (i.e. binder) formed by mixing quick-cracking cationic emulsified asphalt, P.I type silicate cement, an auxiliary agent and naphthalene sulfonic acid formaldehyde condensate sodium salt solution is mixed with aggregate, and the invention provides a preferable proportioning scheme as follows:
when AC-25 aggregate is adopted, the cement asphalt cement is 17-19% and the aggregate is 81-83% calculated by the mass percentage of the whole cement asphalt concrete, wherein in the cement asphalt cement, the emulsified asphalt is 8.9-9.9%, the silicate cement is 8.0-8.9% and the SNFC solution is 0.156-0.173%.
When AC-20 aggregate is adopted, the cement asphalt cement is 17-19% and the aggregate is 81-83% calculated by the mass percentage of the whole cement asphalt concrete, wherein in the cement asphalt cement, the emulsified asphalt is 8.9-9.9%, the silicate cement is 8.0-8.9% and the SNFC solution is 0.156-0.173%.
When AC-10 aggregate is adopted, the cement asphalt cement is 19-21% and the aggregate is 79-81% calculated by the mass percentage of the whole cement asphalt concrete, wherein in the cement asphalt cement, the emulsified asphalt is 9.9-10.8%, the silicate cement is 8.9-9.7% and the SNFC solution is 0.173-0.189%.
The invention provides a preparation method of normal-temperature cement asphalt concrete, which comprises the following steps: firstly mixing quick-cracking cationic emulsified asphalt with SNFC solution, then adding silicate cement and auxiliary agent, continuously mixing and stirring uniformly, and finally adding aggregate and uniformly stirring to obtain cement asphalt concrete.
Preferably, the present invention proposes the most preferred steps, as shown in fig. 1:
(1) The SNFC solution is added into the emulsified asphalt, and is stirred slowly for 1 minute and then stirred rapidly for 1 minute.
(2) The ready-mixed slurry was allowed to stand for 1 minute.
(3) Adding silicate cement and accelerator (or early strength agent) into the slurry, slowly stirring for 1 min, and rapidly stirring for 2 min to obtain cement asphalt cement.
(4) And adding the fine aggregate into the cement asphalt cement slurry, uniformly mixing, and then adding the coarse aggregate, and uniformly mixing.
(5) The mixture was stirred for a minimum of 90 seconds or more until visually homogeneous.
Wherein the slow rate in steps (1) and (3) is about 140.+ -. 5r/min; the rapid rate was about 285.+ -.10 r/min.
Wherein, when the AC-25 aggregate is adopted, the content proportion of the fine aggregate of the AC-25 is 28-41 percent; when the AC-20 aggregate is adopted, the content proportion of the fine aggregate of the AC-20 is 26% -56%; when AC-10 aggregate is used, the content ratio of the fine aggregate of AC-10 is 45% -75%.
The cement asphalt concrete used in the invention uses the water solution of quick-cracking emulsified asphalt and naphthalene sulfonic acid formaldehyde condensate sodium salt to carry out uniform pretreatment mixing procedure, so that the emulsified asphalt is in a highly stable state, and can be directly and uniformly mixed with cement, and the cement is used after being mixed into cement slurry without adding water. Therefore, the cement asphalt concrete used in the invention can be spread uniformly and paved without waiting for the completion of bleeding and the initial setting of cement paste, and the paving and compacting operation is finished at one step by directly using the initial pressing, the continuous pressing and the final pressing of the road roller, thereby conforming to the operation program used by the paving operation of the current road surface.
Compared with the existing asphalt concrete pavement repairing materials, the asphalt mixture which takes petroleum asphalt as a binder is mainly made of lipophilic materials, asphalt oil and water are mutually exclusive in wet ground in rainy days, and asphalt is difficult to permeate the wet pavement and has a binding effect (shown as b in fig. 2). Therefore, asphalt series repairing materials are adopted in the wet ground, the adhesion effect of the new asphalt concrete and the old asphalt concrete is poor, peeling is easy to generate due to soaking and aggregate, and the generation of pavement pits is caused again, so that the repaired pavement is difficult to endure in rainy days. The materials for repairing the asphalt pavement holes are hydrophilic materials (shown as a in figure 2), so that the asphalt pavement holes can be well and durably adhered to the wet ground in rainy days.
Based on the cement asphalt concrete, the invention also provides a method for repairing the broken hole on the wet pavement, the cement asphalt concrete which is prepared by mixing hydrophilic materials can enable the broken surface of the wet pavement hole to be tightly and firmly connected with the cement asphalt concrete, and be firmly integrated with the asphalt concrete pavement around the hole, so that the period of road planing and maintenance can be prolonged, and the concrete steps are as follows:
confirming the position and the area size of the hole repair and drawing on the pavement;
cutting the pavement with a pavement cutter or an electric flat chisel, wherein the cutting surface is approximately perpendicular to the pavement;
crushing and removing asphalt concrete in a repairing range by using a crusher or an excavator;
removing the planing area, and keeping the removing surface as smooth as possible;
a rain shielding umbrella is arranged above the pit, then dry cloth and high-pressure gas are used for removing residual water which cannot be scooped up in the pit, cloth strips or strip-shaped water absorbing cotton is used for surrounding the edge of the pit for one circle, as shown in figure 3, so that road running water is prevented from flowing into the pit again;
under the condition that the roadbed or the base layer needs to be improved, uniformly mixing cement, an accelerator, the loosened roadbed in the pit and soil materials such as the base layer on site, wetting, and then firmly compacting by proper machines, and waiting for hardening of the mixture of the cement roadbed and the base layer; because the materials used by the cement asphalt concrete contain cement accelerator, in order to prevent the cement asphalt concrete from being unable to be compacted before initial setting, the materials can be mixed after the roadbed and the base layer are treated in the step;
spraying or coating adhesive layers on the bottom surface and the side edges of the flattened pit, wherein the adhesive layers are made of cement asphalt cement (adhesive materials of cement asphalt concrete);
dumping the freshly mixed cement asphalt concrete into the pits, and uniformly leveling the loose mixture to be 1-3 cm higher than the original pavement. The thickness of the loose mixture higher than that of the cement asphalt concrete filled in the pit is determined according to the thickness of the cement asphalt concrete, and the thicker the loose mixture is, the larger the thickness is required to be reserved;
tamping the road repairing material to be the same height as the original ground beside the pit by using a flat plate type tamper;
after the cement asphalt concrete is hardened, the surface of the compacted and hardened cement asphalt concrete is pressed by a pen cap tip for 30 minutes after tamping, and is opened and communicated after no dent exists, and the hardened cement asphalt concrete is waited for 30 minutes to be used for cleaning and collecting equipment and recovering the site; and then resume traffic.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (9)

1. The cement asphalt concrete is characterized by comprising the following raw materials:
quick-cracking cationic emulsified asphalt, P.I type silicate cement, an auxiliary agent, naphthalene sulfonic acid formaldehyde condensate sodium salt aqueous solution and aggregate; wherein the auxiliary agent is an accelerator and/or an early strength agent.
2. The cement asphalt concrete of claim 1, wherein the aggregate comprises one or more of AC-25, AC-20, and AC-10 graded aggregates.
3. The cement asphalt concrete of claim 2, wherein the rapid-cracking cationic emulsified asphalt, the silicate cement, the auxiliary agent and the sodium salt aqueous solution of naphthalene sulfonic acid formaldehyde condensate are mixed to form cement asphalt cement, and the cement asphalt cement and the aggregate are proportioned as follows, calculated by the mass percent of the cement asphalt concrete as a whole:
when AC-25 aggregate is adopted, the cement asphalt cement is 17-19%, and the aggregate is 81-83%;
when AC-20 aggregate is adopted, the cement asphalt cement is 17-19%, and the aggregate is 81-83%;
when AC-10 aggregate is used, the cement asphalt cement is 19-21% and the aggregate is 79-81%.
4. A cement asphalt concrete according to claim 3, wherein the weight percentage of the cement asphalt concrete is calculated as a whole;
when AC-25 aggregate is adopted, in the cement asphalt cement, the emulsified asphalt is 8.9-9.9%, the silicate cement is 8.0-8.9%, and the SNFC solution is 0.156-0.173%;
when AC-20 aggregate is adopted, in the cement asphalt cement, the emulsified asphalt is 8.9-9.9%, the silicate cement is 8.0-8.9%, and the SNFC solution is 0.156-0.173%;
when AC-10 aggregate is used, in the cement asphalt cement, the emulsified asphalt is 9.9-10.8%, the silicate cement is 8.9-9.7%, and the SNFC solution is 0.173-0.189%.
5. The cement asphalt concrete of claim 1, wherein the fast-cracking cationic emulsified asphalt is PC-1 fast-cracking cationic emulsified asphalt.
6. A method for preparing cement asphalt concrete according to any one of claims 1 to 5, comprising the steps of:
firstly mixing quick-cracking cationic emulsified asphalt with naphthalene sulfonic acid formaldehyde condensate sodium salt aqueous solution, then adding silicate cement and auxiliary agent, continuously mixing and stirring uniformly, finally adding aggregate, uniformly mixing and obtaining the cement asphalt concrete.
7. The method of manufacturing of claim 6, comprising the steps of:
(1) Firstly, performing pretreatment of emulsified asphalt stabilization, adding SNFC solution into the emulsified asphalt, and stirring until the visual mixture is uniform;
(2) Standing the ready-mixed slurry;
(3) Adding silicate cement and accelerator (or early strength agent) into the slurry, and stirring until the visual mixture is uniform to obtain cement asphalt cement;
(4) Adding fine aggregate into the cement asphalt cement slurry, uniformly mixing, and then adding coarse aggregate, uniformly mixing;
(5) The mixture was stirred until visually homogeneous.
8. The method according to claim 7, wherein when AC-25 aggregate is used, the fine aggregate content ratio of AC-25 is 28% to 41%;
when the AC-20 aggregate is adopted, the content proportion of the fine aggregate of the AC-20 is 26% -56%;
when AC-10 aggregate is used, the content ratio of the fine aggregate of AC-10 is 45% -75%.
9. A method of repairing a hole in a wet road surface, wherein the cement asphalt concrete of any one of claims 1 to 5 is used in the repair of a wet road surface.
CN202311033517.6A 2023-08-16 2023-08-16 Cement asphalt concrete, preparation method and method for repairing broken holes in wet pavement Pending CN117024081A (en)

Priority Applications (1)

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CN202311033517.6A CN117024081A (en) 2023-08-16 2023-08-16 Cement asphalt concrete, preparation method and method for repairing broken holes in wet pavement

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Application Number Priority Date Filing Date Title
CN202311033517.6A CN117024081A (en) 2023-08-16 2023-08-16 Cement asphalt concrete, preparation method and method for repairing broken holes in wet pavement

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CN117024081A true CN117024081A (en) 2023-11-10

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