CN113463463A - Long-life additional-pavement paving method for cement concrete pavement - Google Patents
Long-life additional-pavement paving method for cement concrete pavement Download PDFInfo
- Publication number
- CN113463463A CN113463463A CN202110932545.6A CN202110932545A CN113463463A CN 113463463 A CN113463463 A CN 113463463A CN 202110932545 A CN202110932545 A CN 202110932545A CN 113463463 A CN113463463 A CN 113463463A
- Authority
- CN
- China
- Prior art keywords
- asphalt
- pavement
- cement
- mass ratio
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 79
- 239000004568 cement Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000010426 asphalt Substances 0.000 claims abstract description 130
- 239000010410 layer Substances 0.000 claims abstract description 58
- 238000003892 spreading Methods 0.000 claims abstract description 31
- 230000007480 spreading Effects 0.000 claims abstract description 31
- 239000002131 composite material Substances 0.000 claims abstract description 30
- 239000012790 adhesive layer Substances 0.000 claims abstract description 17
- 238000010521 absorption reaction Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 239000000203 mixture Substances 0.000 claims description 34
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 28
- 239000000843 powder Substances 0.000 claims description 25
- 239000004575 stone Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 22
- 229920000642 polymer Polymers 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 21
- 239000003638 chemical reducing agent Substances 0.000 claims description 20
- 239000003995 emulsifying agent Substances 0.000 claims description 20
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 20
- 239000011707 mineral Substances 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 17
- 229920001971 elastomer Polymers 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000008149 soap solution Substances 0.000 claims description 15
- 239000003381 stabilizer Substances 0.000 claims description 15
- 239000002344 surface layer Substances 0.000 claims description 13
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 239000006184 cosolvent Substances 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000009775 high-speed stirring Methods 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 9
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 8
- 239000011384 asphalt concrete Substances 0.000 claims description 7
- 238000013329 compounding Methods 0.000 claims description 6
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- -1 admixture Substances 0.000 claims description 5
- 235000019270 ammonium chloride Nutrition 0.000 claims description 5
- 125000002091 cationic group Chemical group 0.000 claims description 5
- 239000000084 colloidal system Substances 0.000 claims description 5
- 239000003086 colorant Substances 0.000 claims description 5
- 239000002283 diesel fuel Substances 0.000 claims description 5
- 201000010099 disease Diseases 0.000 claims description 5
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000001863 hydroxypropyl cellulose Substances 0.000 claims description 5
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 claims description 5
- 238000004898 kneading Methods 0.000 claims description 5
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 5
- 239000012875 nonionic emulsifier Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000003129 oil well Substances 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 229960000892 attapulgite Drugs 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 3
- 229910052625 palygorskite Inorganic materials 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 2
- 229910021487 silica fume Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 238000005336 cracking Methods 0.000 description 6
- 230000002195 synergetic effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229920000728 polyester Polymers 0.000 description 3
- 229920002748 Basalt fiber Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000013521 mastic Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
- E01C7/325—Joining different layers, e.g. by adhesive layers; Intermediate layers, e.g. for the escape of water vapour, for spreading stresses
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a long-life additional paving method for a cement concrete pavement, which comprises the following steps: 1) treating a cement concrete base surface; 2) spreading a hardened emulsified asphalt adhesive layer; 3) paving a stress absorption layer of the oil-rich concrete of 1.5-2.5 cm; 4) spreading a modified emulsified asphalt adhesive layer; 5) paving a 6-12cm pouring type composite pavement. The combined pavement layer obtained by the method has the characteristics of strong anti-reflection crack, capability of reducing the thickness of the pavement layer, good anti-rutting effect, skid resistance, wear resistance and long service life.
Description
Technical Field
The invention relates to the field of novel building materials and the field of highway engineering application, in particular to a long-life additional paving method for a cement concrete pavement.
Background
The cement concrete pavement is changed into the asphalt pavement in the last period of the last century in China. The new-built higher-grade pavement is basically mainly an asphalt pavement, and the cement concrete pavement of the old pavement has a large proportion of an asphalt surface layer of 6-12cm additionally paved on the surface of the cement concrete pavement. But the reflective cracks appear after the application for less than 1 year, and the road surface has serious rutting after the application for 2 years. After that, a large number of scientific researchers add anti-cracking measures such as polyester glass fiber cloth, hot asphalt, gravel sealing layers, rubber asphalt stress absorbing layers and the like on the cement concrete base surface, although the occurrence of crack reflection is delayed, the effect is not obvious. In addition, on a cement concrete pavement with high rigidity, the flexible asphalt concrete is easy to deform under the action of load and high temperature, and the driving safety and comfort are greatly influenced.
At present, a large amount of white and black pavements face the problem of overhaul and transformation, the thickness of a cement concrete layer is generally 20-26cm, if the cement concrete is crushed and excavated, on one hand, a large amount of noise is generated, a large amount of solid wastes are generated, on the other hand, a road base layer is damaged, the construction cost is further increased, and the problem is not in accordance with the mainstream of the resource-saving society.
Therefore, a paving method which is convenient to construct and does not need to excavate a cement concrete pavement is needed, so that the service life of the pavement is prolonged, resource waste is avoided, the construction period is shortened, and the fund is saved.
Disclosure of Invention
The invention aims to provide a long-life additional paving method for a cement concrete pavement, which solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a long-life additional paving method for a cement concrete pavement comprises the following steps:
1) treating a cement concrete base surface: before the cement concrete pavement is paved, pouring cracks, treating the cracks by adopting a joint tape with the width of 5-20cm, and carrying out plate replacement treatment on the seriously damaged part by adopting concrete with the same strength or above;
2) spreading a hard emulsified asphalt adhesive layer: after the cement concrete base surface is cleaned and the diseases are treated, spreading hard emulsified asphalt by using a synchronous chip sealer, wherein the spreading amount of the hard emulsified asphalt is 0.5-0.7kg/m2；
3) Paving an oil-rich concrete stress absorption layer: the oil-rich concrete stress absorbing layer is prepared by mixing 3-5cm stone, 0-3cm stone, mineral powder, asphalt, fiber and elastic polymer particles in an asphalt mixing plant, wherein the 3-5cm stone: 0-3cm stone: mineral powder: asphalt: fiber: the mass ratio of the elastic polymer particles is (30-60): (30-60): 10: (8-11):(0.2-0.4): (0.6-2.0);
4) spreading a modified emulsified asphalt adhesive layer: spreading SBS modified emulsified asphalt adhesive layer in the amount of 0.5-0.7kg/m before spreading the upper layer of the composite poured road surface after the oil-rich concrete stress absorbing layer is cooled to below 40 deg.c2；
5) Paving an upper surface layer of the pouring type composite pavement;
a. top layer composition of pouring type composite pavement
The upper surface layer of the pouring type composite pavement is formed by compounding large-gap asphalt concrete and a high-fluidity early-strength grouting material;
the large-gap asphalt mixture is prepared from coarse aggregates, mineral powder, modified asphalt, fibers and a high-viscosity agent according to the mass ratio of 100: (2-3): (2-5): (0.1-0.3): (0-0.7);
the porosity of the large-gap asphalt mixture is 23-33%;
the high-fluidity grouting material consists of cement, admixture, water and synergist, wherein the cement: blending material water: the mass ratio of the synergist is 100: (30-200): (30-70): (3-10);
b. paving the upper layer of the pouring type composite pavement:
paving a large-gap asphalt mixture matrix, wherein the paving thickness is 6-14cm, when the temperature of the large-gap asphalt mixture is reduced to below 60 ℃, uniformly pouring the prepared high-fluidity grouting material on the surface of the large-gap asphalt mixture to form a slurry piling state with the thickness of more than 1cm, pushing redundant surface slurry to a position to be irrigated by adopting a manual or mechanical brush to enable the surface to have a neat exposed stone structure, and maintaining for 1-3h after grouting is finished, so that the vehicle can be put on.
As a preferred embodiment of the present invention, the preparation process of the hardened emulsified asphalt in step 2) comprises:
preparing a soap solution: adding the measured emulsifier and stabilizer into water, stirring and heating to 50-60 deg.C, and regulating pH of the water solution to 1.5-2.5 with hydrochloric acid to obtain soap solution. The mass ratio of the water, the emulsifier and the stabilizer is 100 (5-30) to 0.5-2.5;
adding the melted hard asphalt and the soap solution into a colloid mill according to the mass ratio of 50 (30-50), and grinding for 2-3 cycles to obtain the hard emulsified asphalt.
The hard asphalt is any one of 30# base asphalt, 50# base asphalt and rock asphalt;
the emulsifier is composed of a cationic emulsifier and a nonionic emulsifier according to the mass ratio of 1 (1-3); the stabilizer is composed of sodium hydroxypropyl cellulose and ammonium chloride according to the proportion of 1 (2-4).
As a preferred embodiment of the present invention, the preparation process of the elasticity-increasing polymer particles in step 3) is: 100 parts by mass of styrene-butadiene-styrene block copolymer, 10-60 parts by mass of tackifying resin and 3-40 parts by mass of compatilizer are put into a mixer, high-speed stirring is carried out for 0.5-1h at the temperature of 50-80 ℃, then 30-200 parts by mass of rubber powder and 1-10 parts by mass of cosolvent are added, high-speed stirring is continued for 0.2-1h, finally 5-30 parts by mass of dispersant and 1-5 parts by mass of colorant are added, low-speed stirring is carried out for 10-30 min, and granulation is carried out by adopting a dough kneading machine, so that a product with uniform particle size can be obtained;
the styrene-butadiene-styrene block copolymer is composed of linear SBS and star SBS in the mass ratio of 1 (0.2-5).
As a preferred embodiment of the invention, the synergist in the step 5) consists of a water reducing agent and an early strength agent according to a mass ratio of 1 (0.01-0.4);
the water reducing agent is composed of a powdery naphthalene water reducing agent and a powdery polycarboxylic acid water reducing agent according to the mass ratio of 1 (0.2-3).
As a preferred embodiment of the invention, the cement is one or a mixture of more of high alumina cement, sulphoaluminate cement and oil well cement, and when the cements are mixed, the proportion is arbitrary; the admixture is formed by mixing one or more of mineral powder, fly ash and silica fume, and the proportion is arbitrary when the admixtures are mixed.
In a preferred embodiment of the present invention, the compatibilizer is rubber oil; the cosolvent is diesel oil; the dispersant is any one of kaolin, attapulgite and diatomite.
In a preferred embodiment of the present invention, the early strength agent is one of lithium chloride and lithium carbonate.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides the structural form of a hardened emulsified asphalt adhesive layer, an oil-rich concrete stress absorbing layer of 1.5-2.5cm and an upper surface layer of an poured composite pavement for the first time in the field, not only fully utilizes the waste asphalt mixture, but also achieves the purpose of high rutting resistance from the aspects of materials and structures, thereby realizing the long service life and low carbonization of the road.
(2) The upper layer of the invention uses the cement-asphalt pouring type composite pavement material, is formed by compounding the flexible large-gap asphalt mixture matrix and the rigid cement-based grouting material filler, has the excellent characteristics of rigidity and flexibility, has the flexibility of the asphalt concrete pavement and the rigidity of the cement concrete, simultaneously has high wear resistance, sliding resistance, flatness, anti-rutting performance and anti-shearing performance, and improves the overall anti-rutting performance of the pavement.
(3) The oil-rich concrete stress absorbing layer plays a role in good interlayer connection, stress absorption and inhibition of various reflection cracks, well prevents interlayer slippage, and has the effect of adjusting the pavement evenness. The traditional interlaminar treatment materials such as rubber asphalt stress absorbing layer geotextile are not firmly bonded with a cement concrete base surface on one hand, and are thin on the other hand, so that the reflection of a tip crack is difficult to inhibit. In addition, the high-elastic polymer particles prepared by the method are added into the oil-rich concrete stress absorption layer, so that the softening point of asphalt is increased to more than 95 ℃, the elastic recovery rate reaches 99%, the fatigue life of the oil-rich concrete is prolonged by 2 times, and the effects of high-temperature bonding, high-temperature shearing resistance, slippage resistance, tip crack expansion resistance and stress absorption are greatly improved. In addition, the oil-rich concrete stress absorbing layer can greatly disperse the compressive stress caused by the vehicle load of the vehicle wheel, and can eliminate the bending and tensile stress of upward expansion of the lower surface layer, thereby inhibiting the upward expansion of the reflection cracks, particularly the tip reflection cracks.
(4) The hardened emulsified asphalt adopted by the invention is used as the treatment layer of the cement concrete pavement, has good bonding effect with the cement concrete base surface, and is not easy to be stuck and rolled by automobile tires during subsequent working procedures, so that the phenomenon of bonding failure is generated. When the existing emulsified asphalt is used as a sticky layer, the existing emulsified asphalt is easily rolled up by tires and peeled off, so that the road surface has weak points.
(5) By adopting the cement concrete long-life additional paving method, the pavement structure has more excellent road performance and durability, longer service life and more excellent anti-reflection cracks, and has very wide application prospect and use value.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of a composite pavement layer according to the present invention;
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1:
as shown in fig. 1, a method for long-life additional paving of a cement concrete pavement comprises the following steps:
1) treating a cement concrete base surface: before the cement concrete pavement is paved, pouring cracks, treating the cracks by adopting a joint tape with the width of 5cm, and carrying out plate replacement treatment on the parts with serious damage by adopting concrete with the same strength;
2) spreading a hard emulsified asphalt adhesive layer: after the cement concrete base surface is cleaned and the diseases are treated, spreading hard emulsified asphalt by using a synchronous chip sealer, wherein the spreading amount of the hard emulsified asphalt is 0.5kg/m2；
3) Paving an oil-rich concrete stress absorption layer: the oil-rich concrete stress absorbing layer is prepared by mixing 3-5cm of stone, 0-3cm of stone, mineral powder, asphalt, fiber and elastic polymer particles in an asphalt mixing plant. 3-5cm stone: 0-3cm stone: mineral powder: asphalt: fiber: the mass ratio of the elasticity-increasing polymer particles is 30:58:10:8:0.2: 0.6;
the paving thickness of the oil-rich concrete stress absorption layer is 1.5 cm;
the asphalt is rubber asphalt;
the fiber is lignin fiber;
4) spreading a modified emulsified asphalt adhesive layer: when the oil-rich concrete stress absorbing layer is cooled to below 40 ℃, spreading the SBS modified emulsified asphalt adhesive layer before the upper layer of the poured composite pavement, wherein the spreading amount of the SBS modified emulsified asphalt is 0.5kg/m2；
5) Paving an upper surface layer of the pouring type composite pavement;
a. top layer composition of pouring type composite pavement
The upper surface layer of the pouring type composite pavement is formed by compounding large-gap asphalt concrete and a high-fluidity early-strength grouting material;
the large-gap asphalt mixture is prepared from coarse aggregates, mineral powder, modified asphalt, fibers and a high-viscosity agent according to a mass ratio of 100:2: 3: 0.1: 0.3;
the porosity of the large-gap asphalt mixture is 33%;
the high-fluidity grouting material consists of cement, admixture, water and synergistic polymer, wherein the admixture comprises the following components in percentage by weight: the mass ratio of the synergistic polymer is 100:30:30: 3;
the cement is high-alumina cement;
the admixture is composed of mineral powder and fly ash according to the mass ratio of 1: 2;
b. paving the upper layer of the pouring type composite pavement:
paving a large-gap asphalt mixture matrix, wherein the paving thickness is 6cm, when the temperature of the large-gap asphalt mixture is reduced to below 60 ℃, uniformly pouring the prepared high-fluidity grouting material on the surface of the large-gap asphalt mixture to form a slurry piling state with the thickness of 1cm, pushing redundant surface slurry to a position waiting for pouring by adopting a manual or mechanical brush to ensure that a neat exposed stone structure appears on the surface, and maintaining for 1-3h after the grouting is finished, so that the vehicle can be put on.
The preparation process of the hardened emulsified asphalt in the step 2) comprises the following steps:
preparing a soap solution: adding the measured emulsifier and stabilizer into water, stirring, heating to 50-60 deg.C, and regulating pH of the water solution to 1.5 with hydrochloric acid to obtain soap solution. The mass ratio of the water to the emulsifier to the stabilizer is 100:5: 0.5;
adding the melted hard asphalt and soap solution into a colloid mill according to the mass ratio of 50:30, and grinding for 2-3 cycles to obtain the hard emulsified asphalt.
The hard asphalt is 30# matrix asphalt;
the emulsifier is composed of a cationic emulsifier and a nonionic emulsifier according to the mass ratio of 1: 1; the stabilizer consists of sodium hydroxypropyl cellulose and ammonium chloride according to the proportion of 1: 2.
The preparation process of the elasticity-increasing polymer particles in the step 3) comprises the following steps: 100 parts by mass of styrene-butadiene-styrene block copolymer, 10 parts by mass of tackifying resin and 3 parts by mass of compatilizer are put into a mixer, stirred at a high speed for 0.5h in an environment of 50 ℃, then 30 parts by mass of rubber powder and 1 part by mass of cosolvent are added, the high-speed stirring is continued for 0.2h, finally 5 parts by mass of dispersant and 1 part by mass of colorant are added, and after the low-speed stirring is carried out for 10 minutes, the granulation is carried out by adopting a dough kneading machine, so that a product with uniform particle size can be obtained.
The styrene-butadiene-styrene block copolymer is composed of linear SBS and star SBS according to the mass ratio of 1: 0.2;
the compatilizer is rubber oil;
the cosolvent is diesel oil;
the dispersant is kaolin;
the synergist in the step 5) consists of a water reducing agent and an early strength agent according to the mass ratio of 1: 0.01;
the water reducing agent is composed of a powdery naphthalene water reducing agent and a powdery polycarboxylic acid water reducing agent according to the mass ratio of 1: 0.2;
the early strength agent is lithium chloride.
The present embodiment was tested:
1) the technical indexes of the hardened emulsified asphalt are as follows:
the bonding strength is 1.2 MPa;
2) the technical indexes of the oil-rich concrete stress absorbing layer are as follows:
the dynamic stability is 7300 times/mm;
the brittle point of the oil-rich concrete is-28 ℃;
3) the technical indexes of the pouring type composite pavement material are as follows:
the compressive strength is 13.2 MPa;
marshall stability of 26.1 KN;
the freeze-thaw splitting strength ratio is 98.5 percent;
the dynamic stability at 70 ℃ is 76000 times/mm;
the dynamic stability at 80 ℃ is 26000 times/mm;
the shear strength at 80 ℃ is 3.12 MPa;
the compression resilience modulus at 20 ℃ is 3500 MPa;
4) overall structure index of the road surface:
the overall dynamic stability at 80 ℃ is 23500 times/mm;
the fatigue life is more than or equal to 720 ten thousand times under the stress of 0.4 and the crack width of 1 cm;
example 2
A long-life additional paving method for a cement concrete pavement comprises the following steps:
1) treating a cement concrete base surface: before the cement concrete pavement is paved, the crack is grouted and treated by adopting a joint tape with the width of 10 cm. For the seriously damaged part, adopting concrete with the same strength to carry out plate replacement treatment;
2) hard emulsified asphalt adhesiveSpreading of layers: after the cement concrete base surface is cleaned and the diseases are treated, spreading hard emulsified asphalt by using a synchronous chip sealer, wherein the spreading amount of the hard emulsified asphalt is 0.7kg/m2；
3) Paving an oil-rich concrete stress absorption layer: the oil-rich concrete stress absorbing layer is prepared by mixing 3-5cm of stone, 0-3cm of stone, mineral powder, asphalt, fiber and elastic polymer particles in an asphalt mixing plant. 3-5cm stone: 0-3cm stone: mineral powder: asphalt: fiber: the mass ratio of the elasticity-increasing polymer particles is 60:35:10:10:0.4: 1;
the paving thickness of the oil-rich concrete stress absorption layer is 2.5 cm;
the asphalt is common asphalt;
the fiber is composed of polyester fiber and basalt fiber according to the proportion of 1: 0.5;
4) spreading a modified emulsified asphalt adhesive layer: when the oil-rich concrete stress absorbing layer is cooled to below 40 ℃, spreading the SBS modified emulsified asphalt adhesive layer before the upper layer of the poured composite pavement, wherein the spreading amount of the SBS modified emulsified asphalt is 0.5kg/m2；
5) Paving an upper surface layer of the pouring type composite pavement;
a. top layer composition of pouring type composite pavement
The upper surface layer of the pouring type composite pavement is formed by compounding large-gap asphalt concrete and a high-fluidity early-strength grouting material.
The large-gap asphalt mixture is prepared from coarse aggregates, mineral powder, modified asphalt, fibers and a high-viscosity agent according to a mass ratio of 100:3: 4.2: 0.4: 0;
the porosity of the large-gap asphalt mixture is 25%;
the high-fluidity grouting material consists of cement, admixture, water and a synergistic polymer, wherein the mass ratio of the cement to the admixture water to the synergistic polymer is 100:200:60: 9;
the cement is formed by mixing sulphoaluminate cement and oil well cement according to the mass ratio of 1: 1;
the admixture is mineral powder;
b. paving the upper layer of the pouring type composite pavement:
paving a large-gap asphalt mixture matrix, wherein the paving thickness is 12cm, when the temperature of the large-gap asphalt mixture is reduced to below 60 ℃, uniformly pouring the prepared high-fluidity grouting material on the surface of the large-gap asphalt mixture to form a slurry piling state with the thickness of 1cm, pushing redundant surface slurry to a position waiting for pouring by adopting a manual or mechanical brush to enable the surface to have a neat exposed stone structure, and carrying out maintenance for 2 hours after grouting to get on the vehicle.
The preparation process of the hardened emulsified asphalt in the step 2) comprises the following steps:
preparing a soap solution: adding the measured emulsifier and stabilizer into water, stirring, heating to 50-60 deg.C, and regulating pH of the water solution to 2.5 with hydrochloric acid to obtain soap solution. The mass ratio of the water to the emulsifier to the stabilizer is 100:30: 2.5;
adding the melted hard asphalt and soap solution into a colloid mill according to the mass ratio of 50:50, and grinding for 3 cycles to obtain the hard emulsified asphalt.
The hard asphalt is No. 50 matrix asphalt;
the emulsifier is composed of a cationic emulsifier and a nonionic emulsifier according to the mass ratio of 1: 3; the stabilizer consists of sodium hydroxypropyl cellulose and ammonium chloride according to the proportion of 1: 4.
The preparation process of the elasticity-increasing polymer particles in the step 3) comprises the following steps: 100 parts by mass of styrene-butadiene-styrene block copolymer, 60 parts by mass of tackifying resin and 40 parts by mass of compatilizer are put into a mixer, after high-speed stirring is carried out for 1 hour in the environment of 80 ℃, 200 parts by mass of rubber powder and 10 parts by mass of cosolvent are added, high-speed stirring is continued for 1 hour, finally 30 parts by mass of dispersant and 5 parts by mass of colorant are added, after low-speed stirring is carried out for 30 minutes, granulation is carried out by adopting a kneading machine, and a product with uniform particle size can be obtained.
The styrene-butadiene-styrene block copolymer is composed of linear SBS and star SBS according to the mass ratio of 1: 5;
the compatilizer is rubber oil;
the cosolvent is diesel oil;
the dispersing agent is attapulgite;
the synergist in the step 5) consists of a water reducing agent and an early strength agent according to the mass ratio of 1: 0.4;
the water reducing agent is composed of a powdery naphthalene water reducing agent and a powdery polycarboxylic acid water reducing agent according to the mass ratio of 1: 3;
the early strength agent is lithium carbonate.
Example 3:
a long-life additional paving method for a cement concrete pavement comprises the following steps:
1) treating a cement concrete base surface: before the cement concrete pavement is paved, pouring cracks, treating the cracks by adopting a joint tape with the width of 10cm, and carrying out plate replacement treatment on the parts with serious damage by adopting concrete with the same strength;
2) spreading a hard emulsified asphalt adhesive layer: after the cement concrete base surface is cleaned and the diseases are treated, spreading hard emulsified asphalt by using a synchronous chip sealer, wherein the spreading amount of the hard emulsified asphalt is 0.7kg/m2；
3) Paving an oil-rich concrete stress absorption layer: the oil-rich concrete stress absorbing layer is prepared by mixing 3-5cm of stone, 0-3cm of stone, mineral powder, asphalt, fiber and elastic polymer particles in an asphalt mixing plant. 3-5cm stone: 0-3cm stone: mineral powder: asphalt: fiber: the mass ratio of the elasticity-increasing polymer particles is 60:35:10:10:0.4: 1;
the paving thickness of the oil-rich concrete stress absorption layer is 2.5 cm;
the asphalt is common asphalt;
the fiber is composed of polyester fiber and basalt fiber according to the proportion of 1: 0.5;
4) spreading a modified emulsified asphalt adhesive layer: when the oil-rich concrete stress absorbing layer is cooled to below 40 ℃, spreading the SBS modified emulsified asphalt adhesive layer before the upper layer of the poured composite pavement, wherein the spreading amount of the SBS modified emulsified asphalt is 0.5kg/m2；
5) Paving an upper surface layer of the pouring type composite pavement;
a. top layer composition of pouring type composite pavement
The upper surface layer of the pouring type composite pavement is formed by compounding large-gap asphalt concrete and a high-fluidity early-strength grouting material.
The large-gap asphalt mixture is prepared from coarse aggregates, mineral powder, modified asphalt, fibers and a high-viscosity agent according to a mass ratio of 100:3: 4.2: 0.4: 0;
the porosity of the large-gap asphalt mixture is 25%;
the high-fluidity grouting material consists of cement, admixture, water and a synergistic polymer, wherein the mass ratio of the cement to the admixture water to the synergistic polymer is 100:200:60: 9;
the cement is formed by mixing sulphoaluminate cement and oil well cement according to the mass ratio of 1: 1;
the admixture is mineral powder;
b. paving the upper layer of the pouring type composite pavement:
paving a large-gap asphalt mixture matrix, wherein the paving thickness is 12cm, when the temperature of the large-gap asphalt mixture is reduced to below 60 ℃, uniformly pouring the prepared high-fluidity grouting material on the surface of the large-gap asphalt mixture to form a slurry piling state with the thickness of 1cm, pushing redundant surface slurry to a position waiting for pouring by adopting a manual or mechanical brush to enable the surface to have a neat exposed stone structure, and carrying out maintenance for 2 hours after grouting to get on the vehicle.
The preparation process of the hardened emulsified asphalt in the step 2) comprises the following steps:
preparing a soap solution: adding the measured emulsifier and stabilizer into water, stirring, heating to 50-60 deg.C, and regulating pH of the water solution to 2.5 with hydrochloric acid to obtain soap solution. The mass ratio of the water to the emulsifier to the stabilizer is 100:15: 1;
adding the melted hard asphalt and soap solution into a colloid mill according to the mass ratio of 50:40, and grinding for 2-3 cycles to obtain the hard emulsified asphalt.
The hard asphalt is No. 50 matrix asphalt;
the emulsifier is composed of a cationic emulsifier and a nonionic emulsifier according to the mass ratio of 1: 2; the stabilizer consists of sodium hydroxypropyl cellulose and ammonium chloride according to the proportion of 1: 3.
The preparation process of the elasticity-increasing polymer particles in the step 3) comprises the following steps: 100 parts by mass of styrene-butadiene-styrene block copolymer, 40 parts by mass of tackifying resin and 18 parts by mass of compatilizer are put into a mixer, after high-speed stirring is carried out for 0.6h in the environment of 60 ℃, 100 parts by mass of rubber powder and 6 parts by mass of cosolvent are added, high-speed stirring is continued for 0.5h, finally 17 parts by mass of dispersant and 3 parts by mass of colorant are added, after low-speed stirring is carried out for 20 min, granulation is carried out by adopting a dough kneading machine, and a product with uniform particle size can be obtained.
The styrene-butadiene-styrene block copolymer is composed of linear SBS and star SBS according to the mass ratio of 1: 2;
the compatilizer is rubber oil;
the cosolvent is diesel oil;
the dispersing agent is diatomite;
the synergist in the step 5) consists of a water reducing agent and an early strength agent according to the mass ratio of 1: 0.18;
the water reducing agent is composed of a powdery naphthalene water reducing agent and a powdery polycarboxylic acid water reducing agent according to the mass ratio of 1: 1.4;
the early strength agent is lithium chloride.
Comparative example:
in order to verify the effect of the present invention, 4 comparative examples were conducted to prepare a combination type test piece having a length of 600mm and a width of 400mm, and other parameters of the comparative examples were identical to those of example 1 except that the following points are shown in Table 1:
TABLE 1
Wherein the performance indexes of the mixture (SMA) of the asphalt mastic macadam are as follows: the compressive strength is 12.2MPa, the Marshall stability is 12.4KN, and the dynamic stability at 70 ℃ is 2800 times/mm; the shear strength at 70 ℃ is 0.57 MPa;
the rubber asphalt used for the 1.5cm rubber asphalt stress absorbing layer had a softening point of 62.0 ℃ and an elastic recovery of 89.4%.
The properties of the overall structure of the pavement obtained in the comparative example are shown in table 2:
TABLE 2
And cutting the combined test block, wherein the length of the test block for testing the dynamic stability is 300mm, and the width of the test block is 300 mm.
In the fatigue test, the test piece had a length of 600mm and a width of 15 mm.
Comparative example 1 is a conventional paving scheme, and comparative example 1 is inferior to example 1 in both high temperature performance and level of anti-reflective cracking capability;
compared with the embodiment 1, the fatigue life of the pavement still can not reach the level of the embodiment 1 after the pavement is continuously thickened, which shows that the technology has the effect of reducing the pavement additional thickness;
compared with the example 1, the high-temperature anti-rutting performance is basically equivalent to that of the high-temperature anti-rutting performance only by replacing the concrete interface viscous layer oil, but the anti-cracking performance is reduced by 20%, which shows that when the hard emulsified asphalt developed in the scheme is used as the cement concrete interface viscous layer oil, the high-temperature performance is not lost, and the anti-cracking performance is improved to have a more remarkable effect.
Compared with the example 1, the comparative example 4 only changes the middle treatment layer, the high-temperature anti-rutting capability is slightly reduced, but the anti-cracking capability is reduced by 53 percent, which shows that when the rich-oil concrete stress absorbing layer developed in the scheme is used as the middle treatment layer, the anti-cracking capability improving effect is very obvious and is higher than the technical level of the current rubber asphalt stress absorbing layer.
From these comparative examples, it can be seen that the novel pavement of the present invention has a reasonable structure, is excellent in both rut resistance and fatigue resistance, and can fully meet the requirement of long service life of the pavement.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A long-life additional paving method for a cement concrete pavement is characterized by comprising the following steps: the method comprises the following steps:
1) treating a cement concrete base surface: before the cement concrete pavement is paved, pouring cracks, treating the cracks by adopting a joint tape with the width of 5-20cm, and carrying out plate replacement treatment on the seriously damaged part by adopting concrete with the same strength or above;
2) spreading a hard emulsified asphalt adhesive layer: after the cement concrete base surface is cleaned and the diseases are treated, spreading hard emulsified asphalt by using a synchronous chip sealer, wherein the spreading amount of the hard emulsified asphalt is 0.5-0.7kg/m2；
3) Paving an oil-rich concrete stress absorption layer: the oil-rich concrete stress absorbing layer is prepared by mixing 3-5cm stone, 0-3cm stone, mineral powder, asphalt, fiber and elastic polymer particles in an asphalt mixing plant, wherein the 3-5cm stone: 0-3cm stone: mineral powder: asphalt: fiber: the mass ratio of the elastic polymer particles is (30-60): (30-60): 10: (8-11):(0.2-0.4): (0.6-2.0);
4) spreading a modified emulsified asphalt adhesive layer: spreading SBS modified emulsified asphalt adhesive layer in the amount of 0.5-0.7kg/m before spreading the upper layer of the composite poured road surface after the oil-rich concrete stress absorbing layer is cooled to below 40 deg.c2；
5) Paving an upper surface layer of the pouring type composite pavement;
a. top layer composition of pouring type composite pavement
The upper surface layer of the pouring type composite pavement is formed by compounding large-gap asphalt concrete and a high-fluidity early-strength grouting material;
the large-gap asphalt mixture is prepared from coarse aggregates, mineral powder, modified asphalt, fibers and a high-viscosity agent according to the mass ratio of 100: (2-3): (2-5): (0.1-0.3): (0-0.7);
the porosity of the large-gap asphalt mixture is 23-33%;
the high-fluidity grouting material consists of cement, admixture, water and synergist, wherein the cement: blending material water: the mass ratio of the synergist is 100: (30-200): (30-70): (3-10);
b. paving the upper layer of the pouring type composite pavement:
paving a large-gap asphalt mixture matrix, wherein the paving thickness is 6-14cm, when the temperature of the large-gap asphalt mixture is reduced to below 60 ℃, uniformly pouring the prepared high-fluidity grouting material on the surface of the large-gap asphalt mixture to form a slurry piling state with the thickness of more than 1cm, pushing redundant surface slurry to a position to be irrigated by adopting a manual or mechanical brush to enable the surface to have a neat exposed stone structure, and maintaining for 1-3h after grouting is finished, so that the vehicle can be put on.
2. The long-life additional paving method for the cement concrete pavement as recited in claim 1, characterized in that: the preparation process of the hardened emulsified asphalt in the step 2) comprises the following steps:
preparing a soap solution: adding the measured emulsifier and stabilizer into water, stirring and heating to 50-60 deg.C, and regulating pH of the water solution to 1.5-2.5 with hydrochloric acid to obtain soap solution. The mass ratio of the water, the emulsifier and the stabilizer is 100 (5-30) to 0.5-2.5;
adding the melted hard asphalt and the soap solution into a colloid mill according to the mass ratio of 50 (30-50), and grinding for 2-3 cycles to obtain the hard emulsified asphalt.
The hard asphalt is any one of 30# base asphalt, 50# base asphalt and rock asphalt;
the emulsifier is composed of a cationic emulsifier and a nonionic emulsifier according to the mass ratio of 1 (1-3); the stabilizer is composed of sodium hydroxypropyl cellulose and ammonium chloride according to the proportion of 1 (2-4).
3. The long-life additional paving method for the cement concrete pavement as recited in claim 1, characterized in that: the preparation process of the elasticity-increasing polymer particles in the step 3) comprises the following steps: 100 parts by mass of styrene-butadiene-styrene block copolymer, 10-60 parts by mass of tackifying resin and 3-40 parts by mass of compatilizer are put into a mixer, high-speed stirring is carried out for 0.5-1h at the temperature of 50-80 ℃, then 30-200 parts by mass of rubber powder and 1-10 parts by mass of cosolvent are added, high-speed stirring is continued for 0.2-1h, finally 5-30 parts by mass of dispersant and 1-5 parts by mass of colorant are added, low-speed stirring is carried out for 10-30 min, and granulation is carried out by adopting a dough kneading machine, so that a product with uniform particle size can be obtained;
the styrene-butadiene-styrene block copolymer is composed of linear SBS and star SBS in the mass ratio of 1 (0.2-5).
4. The long-life additional paving method for the cement concrete pavement as recited in claim 1, characterized in that: the synergist in the step 5) consists of a water reducing agent and an early strength agent according to the mass ratio of 1 (0.01-0.4);
the water reducing agent is composed of a powdery naphthalene water reducing agent and a powdery polycarboxylic acid water reducing agent according to the mass ratio of 1 (0.2-3).
5. The long-life additional paving method for the cement concrete pavement as recited in claim 1, characterized in that: the cement is formed by mixing one or more of high-alumina cement, sulphoaluminate cement and oil well cement, and the proportion is random when the cements are mixed; the admixture is formed by mixing one or more of mineral powder, fly ash and silica fume, and the proportion is arbitrary when the admixtures are mixed.
6. The long-life additional paving method for the cement concrete pavement as claimed in claim 3, wherein the additional paving method comprises the following steps: the compatilizer is rubber oil; the cosolvent is diesel oil; the dispersant is any one of kaolin, attapulgite and diatomite.
7. The long-life additional paving method for the cement concrete pavement as claimed in claim 4, wherein the additional paving method comprises the following steps: the early strength agent is one of lithium chloride and lithium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110932545.6A CN113463463A (en) | 2021-08-13 | 2021-08-13 | Long-life additional-pavement paving method for cement concrete pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110932545.6A CN113463463A (en) | 2021-08-13 | 2021-08-13 | Long-life additional-pavement paving method for cement concrete pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113463463A true CN113463463A (en) | 2021-10-01 |
Family
ID=77867896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110932545.6A Pending CN113463463A (en) | 2021-08-13 | 2021-08-13 | Long-life additional-pavement paving method for cement concrete pavement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113463463A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113897835A (en) * | 2021-10-28 | 2022-01-07 | 长安大学 | A perfusion type self-brightening asphalt pavement top layer, its preparation process and its application |
| CN115110371A (en) * | 2022-06-02 | 2022-09-27 | 广东冠粤路桥有限公司 | Construction method of asphalt composite pavement of highway tunnel |
| CN115874502A (en) * | 2022-12-28 | 2023-03-31 | 华南农业大学 | Composite pavement with reflection crack prevention and treatment function and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671991A (en) * | 2009-08-10 | 2010-03-17 | 武汉理工大学 | Method for paving combination paving layer for tunnel road surface |
| CN103952958A (en) * | 2014-05-08 | 2014-07-30 | 苏州市市政工程设计院有限责任公司 | Method for rut maintaining and paving of municipal road |
| CN106046820A (en) * | 2016-08-12 | 2016-10-26 | 长安大学 | Preparation method for hard emulsified asphalt |
| CN109370513A (en) * | 2018-09-29 | 2019-02-22 | 南京兴佑交通科技有限公司 | A kind of adhesion coating emulsified asphalt and preparation method thereof |
| CN111234439A (en) * | 2020-02-28 | 2020-06-05 | 江苏凯信环保材料有限公司 | High-viscosity high-modulus asphalt modifier and preparation method thereof |
-
2021
- 2021-08-13 CN CN202110932545.6A patent/CN113463463A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671991A (en) * | 2009-08-10 | 2010-03-17 | 武汉理工大学 | Method for paving combination paving layer for tunnel road surface |
| CN103952958A (en) * | 2014-05-08 | 2014-07-30 | 苏州市市政工程设计院有限责任公司 | Method for rut maintaining and paving of municipal road |
| CN106046820A (en) * | 2016-08-12 | 2016-10-26 | 长安大学 | Preparation method for hard emulsified asphalt |
| CN109370513A (en) * | 2018-09-29 | 2019-02-22 | 南京兴佑交通科技有限公司 | A kind of adhesion coating emulsified asphalt and preparation method thereof |
| CN111234439A (en) * | 2020-02-28 | 2020-06-05 | 江苏凯信环保材料有限公司 | High-viscosity high-modulus asphalt modifier and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113897835A (en) * | 2021-10-28 | 2022-01-07 | 长安大学 | A perfusion type self-brightening asphalt pavement top layer, its preparation process and its application |
| CN115110371A (en) * | 2022-06-02 | 2022-09-27 | 广东冠粤路桥有限公司 | Construction method of asphalt composite pavement of highway tunnel |
| CN115110371B (en) * | 2022-06-02 | 2023-11-24 | 广东冠粤路桥有限公司 | Construction method of highway tunnel asphalt composite pavement |
| CN115874502A (en) * | 2022-12-28 | 2023-03-31 | 华南农业大学 | Composite pavement with reflection crack prevention and treatment function and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113463463A (en) | Long-life additional-pavement paving method for cement concrete pavement | |
| CN103952958B (en) | A kind of town road rut maintenance method for paving | |
| CN100572668C (en) | A kind of half-flexible water drainage skid-free noise-reducing road surface pavement structure | |
| CN103265249B (en) | A kind of Fast rush-repair mortar for ballastless track filling layer and its preparation method and application | |
| CN106186922B (en) | semi-rigid asphalt pavement material and preparation method thereof | |
| CN104926233A (en) | High-RAP-content asphalt mixture formula and preparation method | |
| CN101235207B (en) | Preparation method of asphalt pavement crevice embedding sealing material | |
| CN104762861A (en) | Semi-flexible pavement based on cold-recycling base of bituminous pavement and construction method of semi-flexible pavement | |
| CN104609805A (en) | Half-flexible pavement material for rapid traffic opening and method of half-flexible pavement material for paving pavement | |
| CN107473635B (en) | Asphalt concrete and preparation process thereof | |
| CN112174584A (en) | Semi-flexible pavement material and pavement structure paving method | |
| CN109797620B (en) | An integral rutting-resistant pavement structure for heavy-duty traffic based on composite materials | |
| CN103204654B (en) | Micro-surfacing mixing material doped with rock asphalt and preparation method thereof | |
| CN111393075B (en) | High-viscosity modified asphalt mixture and application thereof | |
| CN112252108B (en) | Road construction method for in-situ cold recycling of asphalt pavement | |
| CN110423090A (en) | A kind of cold gap-grouting material of rapid hardening cracking resistance and preparation method thereof for pavement crack repair | |
| CN104692744A (en) | Road patching material with favorable elasticity and abrasion resistance and application thereof | |
| CN114180896B (en) | Cement stabilized macadam base composition and preparation and construction process thereof | |
| CN108147727B (en) | High-strength asphalt concrete pavement construction method | |
| CN111172836A (en) | Multifunctional active composite seal layer pavement | |
| CN103601418B (en) | A kind of for watering Interface enhancer and application thereof prepared by formula ground surface material | |
| CN110714389A (en) | Ultrathin high-performance composite semi-flexible surface layer pavement structure and construction method thereof | |
| CN107721330B (en) | Durable cement concrete pavement slab bottom grouting material and preparation method thereof | |
| CN107059615B (en) | Durable cement concrete bridge deck pavement structure | |
| CN215800759U (en) | Composite pavement structure suitable for heavy-load traffic road |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |