CN109824301B - Water-based polymer stabilized macadam material for roads, preparation and construction method - Google Patents
Water-based polymer stabilized macadam material for roads, preparation and construction method Download PDFInfo
- Publication number
- CN109824301B CN109824301B CN201910285107.8A CN201910285107A CN109824301B CN 109824301 B CN109824301 B CN 109824301B CN 201910285107 A CN201910285107 A CN 201910285107A CN 109824301 B CN109824301 B CN 109824301B
- Authority
- CN
- China
- Prior art keywords
- water
- based polymer
- stabilized macadam
- base material
- road
- 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.)
- Active
Links
Images
Landscapes
- Road Paving Structures (AREA)
Abstract
The invention provides a water-based polymer stabilized macadam base material for roads, a preparation method and a construction method thereof, wherein the water-based polymer stabilized macadam base material for roads can comprise the following components: a combination polymer, graded crushed stone and water, wherein the combination polymer comprises: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components. The water-based polymer stabilized macadam base material is of a flexible structure, and has good water loss shrinkage resistance and temperature shrinkage resistance, so that the water-based polymer stabilized macadam base material has higher deformation resistance when being used as a paving material.
Description
Technical Field
The invention relates to the technical field of road building materials, in particular to a water-based polymer stabilized macadam base material for roads, and a preparation and construction method thereof.
Background
Semi-rigid base asphalt pavement has become the main form of asphalt pavement structure in China and almost the only structure form including expressways in China. At present, the main forms of the semi-rigid base course are a cement stabilized macadam base course, a lime fly ash stabilized macadam base course and the like.
Because cement stabilized macadam base course and lime fly ash stabilized macadam base course produce shrinkage crack (drying shrinkage and temperature shrinkage) easily under the influence of difference in temperature, humidity condition, lead to the basic unit to appear horizontal crack, and the horizontal crack of basic unit can reflect to the clean up surface course, makes the pitch surface course appear reflecting crack. Under the combined action of long-time weather conditions, road loads, overloaded vehicles and the like, the overall strength of the road is reduced and the base layer is locally sunk due to both transverse cracks and reflection cracks.
The above problems are mainly caused by the defects of high brittleness, low deformation resistance and the like of semi-rigid substrates such as cement-stabilized macadam substrates and lime-fly ash-stabilized macadam substrates. Therefore, it is important to develop a new paving material having low brittleness and high deformation resistance.
Disclosure of Invention
The embodiment of the invention provides a water-based polymer stabilized macadam base material for roads, and a preparation and construction method thereof.
A water-based polymer stabilized macadam base material for roads comprising: a combination polymer, graded crushed stone and water, wherein the combination polymer comprises: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components.
Preferably, the first and second electrodes are formed of a metal,
the addition amount of the combined polymer accounts for 0.4-1% of the dry weight of the graded broken stone.
Preferably, the first and second electrodes are formed of a metal,
the combination polymer, comprising: 8 to 10 percent of propylene, 10 to 12 percent of styrene, 5 to 6 percent of lubricant, 1.5 to 3.5 percent of siloxane resin, 5 to 10 percent of polymethacrylate, 57.5 to 70 percent of other esters and 0.5 to 1 percent of combined catalytic component.
Preferably, the other esters include: one or both of animal fat and oil and vegetable fat and oil.
Preferably, the polymethacrylates comprise: any one or more of polymethyl methacrylate, polyethyl methacrylate and polybutyl methacrylate.
Preferably, the combined catalytic component comprises: enhancers, anti-aging agents, set accelerators, and demulsifiers.
Preferably, the combined polymer has a density of 0.5g/cm3～3.0g/cm3。
Preferably, the first and second electrodes are formed of a metal,
the composition range of the graded broken stone meets the following requirements: the passing rate of a standard sieve pore of 31.5mm is 90-100%, the passing rate of a standard sieve pore of 26.5mm is 79-95%, the passing rate of a standard sieve pore of 19.0mm is 60-85%, the passing rate of a standard sieve pore of 16.0mm is 53-80%, the passing rate of a standard sieve pore of 13.2mm is 48-74%, the passing rate of a standard sieve pore of 9.5mm is 40-65%, the passing rate of a standard sieve pore of 4.75mm is 25-50%, the passing rate of a standard sieve pore of 2.36mm is 18-40%, the passing rate of a standard sieve pore of 0.6mm is 9-25%, the passing rate of a standard sieve pore of 0.3mm is 6-20%, and the passing rate.
Preferably, the coarse aggregate in the graded crushed stone needs to satisfy the following conditions: a crush value < 26%, a los angeles abrasion value < 35%, a firmness test using sodium sulfate 5 cycles < 12%, a content of particles with two fractured surfaces greater than 60%, a content of pin-and-plate particles < 20%;
the fine aggregate in the graded crushed stone needs to meet the conditions: liquid limit is less than 28%, plasticity index is less than 9, sand equivalent is greater than 45%, and the firmness test adopts sodium sulfate for 5 cycles and less than 12%.
The method for preparing the water-based polymer stabilized macadam base material for roads comprises the following steps:
diluting a combined polymer by using water, and uniformly mixing the water and the combined polymer by a stirring mode, wherein the combined polymer comprises: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components;
and mixing the diluted combined polymer with the graded broken stones, standing and sealing the materials, wherein the standing and sealing time is not less than 1 hour.
Preferably, the first and second electrodes are formed of a metal,
the addition amount of the combined polymer is 0.4-1% of the dry weight of the graded broken stone.
Preferably, the first and second electrodes are formed of a metal,
when the mass ratio of the amount of the diluting water to the combined polymer is regulated to (2-1): 1, water is continuously added while the diluted combined polymer and the graded crushed stone are mixed.
The construction method of any one of the above water-based polymer stabilized macadam base materials for roads, wherein the water-based polymer stabilized macadam base materials for roads are laid on a pavement sub-base layer and/or a pavement base layer of a road; further comprising:
and paving the water-based polymer stabilized macadam base material for the road in a target area, wherein the paving coefficient meets 1.29-1.35, and compacting in a rolling mode.
Preferably, the first and second electrodes are formed of a metal,
after the compacting by rolling, further comprising: the water volatilization of the compacted water-based polymer stabilized macadam base material for the road is realized in the modes of airing, natural air drying and vehicle rolling;
and after the water content of the base layer/the base layer paved by the water-based polymer stabilized macadam base material for the road is not more than 1%, the compactness of the base layer/the base layer reaches more than 96%, and the California bearing ratio CBR reaches more than 160%, paving a surface layer.
Preferably, the construction method further comprises: and curing the base layer/base layer paved with the water-based polymer stabilized macadam base material for the road by using coarse sand/stone chips/penetrating oil spraying/emulsified asphalt layer spraying so as to protect the surface flatness of the base layer/base layer paved with the water-based polymer stabilized macadam base material for the road.
Preferably, the rolling manner includes: rolling for at least five times by using a smooth road roller with the thickness of more than 20t, wherein the rolling speed of the first two times is 1.5-1.7 km/h, and the rolling speed of the third time is 2.0-2.5 km/h.
Preferably, the rolling manner includes: and (3) jointly rolling for at least five times by matching a smooth road roller with more than 15 tons of rubber-tyred road rollers, wherein the rolling speed of the first two times is 1.5-1.7 km/h, the rolling speed of the third time is 2.0-2.5 km/h, the rear wheels of the rubber-tyred road rollers are overlapped by 1/3 wheel widths, and the rear wheels of the rubber-tyred road rollers exceed the joints of the two sections of rolling.
The embodiment of the invention provides a water-based polymer stabilized macadam base material for roads, a preparation method and a construction method thereof, wherein the water-based polymer stabilized macadam base material for roads comprises the following steps: a combination polymer, graded crushed stone and water, wherein the combination polymer comprises: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components. The water-based polymer stabilized macadam base course material for the road is a paving material with a flexible structure, and in addition, the water-based polymer stabilized macadam base course material for the road has lower drying shrinkage coefficient and temperature shrinkage coefficient through drying shrinkage and temperature shrinkage detection, namely has better water loss shrinkage resistance and temperature shrinkage resistance, so that the water-based polymer stabilized macadam base course material for the road has higher deformation resistance as the paving material.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic illustration of a method of making a water-based polymer stabilized macadam base material for pavement according to one embodiment of the present invention;
fig. 2 is a method for constructing a water-based polymer stabilized macadam base material for roads, according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
Embodiments of the present invention provide a water-based polymer stabilized macadam base material for roads, which includes: a combination polymer, graded crushed stone and water, wherein the combination polymer comprises: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components.
The water-based polymer stabilized macadam base course material for the road is a paving material with a flexible structure, water is used for conducting a medium of a combined polymer and guaranteeing the maximum dry density of the material, and in addition, the water-based polymer stabilized macadam base course material for the road has lower dry shrinkage coefficient and temperature shrinkage coefficient through dry shrinkage and temperature shrinkage detection, wherein the dry shrinkage coefficient ranges from 7.55 x 10-5～10.16×10-5The temperature shrinkage coefficient range is 2.49 multiplied by 10-6～4.73×10-6Namely, the waterproof material has better water loss shrinkage resistance and temperature shrinkage resistance, so that the waterproof material has higher deformation resistance as a paving material. Meanwhile, the water-based polymer stabilized macadam base material for the road is a thermosetting material and cannot be softened at high temperature, so that rutting does not occur when the water-based polymer stabilized macadam base material is used for paving, and a certain cementing power is provided on the basis of the embedded extrusion force of graded macadams, so that the fatigue resistance is ensured.
The composite polymer is an artificially synthesized non-petroleum derivative which is an organic substance and can be obtained by cold mixing, and the composite polymer has thermosetting property. In addition, the process for preparing the water-based polymer stabilized macadam base material for the road is also obtained in a cold mixing mode. The graded broken stone is broken natural gravel, so that the water-based polymer stabilized broken stone base material for the road has the characteristics of the combined polymer such as thermosetting property and the like, and also keeps the characteristics of the graded broken stone.
Wherein, in the water-based polymer stabilized macadam base material for roads, the addition amount of the combined polymer accounts for 0.4-1% of the dry weight of the graded macadam, and preferably, the addition amount of the combined polymer accounts for 0.5% of the dry weight of the graded macadam. The combined polymer can be used as a road glue for gluing graded macadam, namely the combined polymer and the graded macadam are combined into polymer stabilized macadam or polymer concrete, the using amount of the combined polymer is low, the production cost of the road water-based polymer stabilized macadam base material can be greatly reduced while the water loss shrinkage resistance, the temperature shrinkage resistance and the deformation resistance of the road water-based polymer stabilized macadam base material are effectively enhanced, and the cost performance of the road water-based polymer stabilized macadam base material is greatly improved.
Further, per part by mass of the combined polymer, comprising: 8 to 10 percent of propylene, 10 to 12 percent of styrene, 5 to 6 percent of lubricant, 1.5 to 3.5 percent of siloxane resin, 5 to 10 percent of polymethacrylate, 57.5 to 70 percent of other esters and 0.5 to 1 percent of combined catalytic component. The composition can ensure that the combined polymer and water are mixed and added into graded broken stone to prepare the road water-based polymer stabilized broken stone base material, the road water-based polymer stabilized broken stone base material keeps better ductility, the road water-based polymer stabilized broken stone base material is used as a paving material, after rolling, the combined polymer increases the cohesiveness of the combined polymer through demulsification and dehydration, the graded broken stone is glued, the stability of the graded broken stone is ensured, in addition, after dehydration, the graded broken stone becomes a main component of paving, the graded broken stone is formed by combining micro-particle broken stones with different components, no crack problem is generated between the micro-particle broken stone and the micro-particle broken stone, the combined polymer for gluing the graded broken stone provided by the embodiment is insoluble in water after cementing and hardening, and simultaneously the combined polymer has the characteristic of thermosetting, so that the water immersion and heating after cementing of the polymer are irreversible, and the compactness and the caking property are, the stability of the structural layer of the water-based polymer stabilized macadam base material for the road is enhanced.
Among other esters, there are: one or two of animal fat and vegetable fat, such as lard and tallow; the vegetable oil and fat can be rubber, resin, peach gum, etc.
Wherein the polymethacrylates may include: any one or more of polymethyl methacrylate, polyethyl methacrylate and polybutyl methacrylate.
The above esters give the combined polymer better adhesive strength and mechanical strength. In addition, the esters have long chain structures which intertwine to form a large number of molded bodies. Meanwhile, the micro characteristics and the bonding strength of the colloid are determined by the winding characteristics of the long-chain structure. The plastic body is amorphous in structure because the winding direction of the ester chain is random. So that the combined polymer has better impact strength and toughness.
The combined catalytic component may include: the reinforcing agent, the anti-aging agent, the coagulant and the demulsifier enable the combined polymer to have better anti-aging property and thermosetting property, and simultaneously, water can be used as a transfer means to lubricate and wrap the granules with different particle sizes. Under the action of mechanical compaction, the demulsification of the combined polymer is promoted by the demulsifier, and then ester long chains in the combined polymer are interwoven together, so that the stability is enhanced along with the improvement of the compaction degree and the bonding degree.
The density of the combined polymer is 0.5g/cm 3-3.0 g/cm3, preferably the density of the combined polymer is controlled within the range of 1g/cm 3-2 g/cm3, and the density is close to that of water, so that the combined polymer can be diluted with water and can be sufficiently mixed with water by cold stirring, and the combined polymer is a water-based emulsion. The mixture is easy to be mixed with water and added into graded broken stone. That is, the above-mentioned combined polymer may be uniformly dispersed on the surface of solid particles such as earth and stone using water as a conducting medium, or the combined polymer may be used as a transmission means for lubricating and wrapping the particles having different particle sizes. Under the mechanical compaction effect, polymer chains are linked together, the structural layer stability is enhanced along with the improvement of the compaction degree and the bonding degree, namely, through the effective compaction and the natural curing moisture volatilization cementing process, organic mucosa with a chain type structure is formed on the surface of each solid particle in the road structural layer, and a cementing whole is formed. Meanwhile, the combined polymer is water-based and has small using amount, so that the water-based polymer stabilized macadam base material for roads has environmental protection property.
In addition, through testing the combined polymer, the pH value of the combined polymer is 8-9, the solid content is 28.5-31.5%, the viscosity is 50-100CPS, the boiling point is 100 ℃, and the combined polymer has non-corrosiveness and non-combustibility.
In another embodiment of the invention, the stability, flexibility and deformation resistance of the water-based polymer stabilized macadam base material for roads can be further improved. Meanwhile, in order to ensure that the water-based polymer stabilized macadam base material for the road can be enhanced along with the enhancement of the compaction degree, the stability and the compactness of the water-based polymer stabilized macadam base material are gradually enhanced. The composition range of the graded broken stone meets the following requirements: the passing rate of a standard sieve pore of 31.5mm is 90-100%, the passing rate of a standard sieve pore of 26.5mm is 79-95%, the passing rate of a standard sieve pore of 19.0mm is 60-85%, the passing rate of a standard sieve pore of 16.0mm is 53-80%, the passing rate of a standard sieve pore of 13.2mm is 48-74%, the passing rate of a standard sieve pore of 9.5mm is 40-65%, the passing rate of a standard sieve pore of 4.75mm is 25-50%, the passing rate of a standard sieve pore of 2.36mm is 18-40%, the passing rate of a standard sieve pore of 0.6mm is 9-25%, the passing rate of a standard sieve pore of 0.3mm is 6-20%, and the passing rate;
wherein the passage rate is relative to the dry weight of the graded crushed stone. The graded broken stones form an embedding force, the combined polymer stabilized broken stones are densely distributed with large grain size, and the porosity is 3-8%. The coarse aggregate is locked into a framework, the fine aggregate fills gaps to form a compact framework structure, and the compacted coarse aggregate has good strength, stability, anti-rutting and anti-fatigue failure capabilities and a wide grading range.
It is worth to be noted that the crushing value of the graded broken stone is not more than 30%, and the broken stone raw material can be various types of rocks (except soft rocks); the broken stone should not contain clay blocks, plants and other harmful substances.
In graded broken stone, fine aggregate with the grain diameter not more than 2.36mm needs to meet the requirements that the liquid limit is less than 28%, the plasticity index in a humid and rainy region is preferably less than 6, the plasticity index in other regions is preferably less than 9, the sand equivalent is more than 45%, a firmness test adopts 5 cycles of sodium sulfate and is less than 12%, and the grain content of two fracture surfaces is more than 60%. The fine aggregate can use fine screening excess materials of a gravel field, can also use fine screening excess materials of stone materials for surface treatment and penetration of rolling asphalt, and can also be machine-made stone chips, wherein the machine-made stone chips are preferred.
In graded macadam, coarse aggregate with a particle size greater than 2.36mm must meet a crush value < 26%, a los Angeles attrition value < 35%, a firmness test using sodium sulfate for 5 cycles < 12%, a particle content greater than 60% with two fractured surfaces, and a pin-and-plate particle content < 20%.
In addition, the rutting detection result of the road water-based polymer stabilized macadam base material proves that: the dynamic stability DS (sub/mm) of the water-based polymer stabilized macadam base material for the road is about 30000 and is far higher than that of some existing road materials.
In addition, the strength detection result of the road water-based polymer stabilized macadam base material proves that: compared with the standard graded macadam with the California bearing ratio of 100 percent of CBR, the bearing ratio strength of the water-based polymer stabilized macadam base material for the road can reach CBR350 percent, so that the overall strength of a structural layer paved by the water-based polymer stabilized macadam base material for the road is obviously improved.
In another embodiment of the invention, the water-based polymeric stabilized macadam base material used in road paving applications has a liquid limit of no greater than 28% in order to allow for easier handling of the water-based polymeric stabilized macadam base material during paving applications while allowing for direct traffic through the pavement after paving applications are complete.
In another embodiment of the present invention, in order to further facilitate handling of the water-based polymer stabilized macadam base course material for roads during paving, and to ensure stability and the like after paving with the water-based polymer stabilized macadam base course material, the fine aggregate in the water-based polymer stabilized macadam base course material for roads has a shape index of not more than 9. For wet, rainy regions, the plasticity index is not greater than 6.
As shown in fig. 1, embodiments of the present invention provide a method for preparing a water-based polymer stabilized macadam base material for roads, which may include the steps of:
step 101: diluting the combined polymer by using water, and uniformly mixing the water and the combined polymer by a stirring mode, wherein the combined polymer comprises: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components;
step 102: and mixing the diluted combined polymer with the graded broken stones, standing and sealing the materials, wherein the standing and sealing time is not less than 1 hour.
After the combined polymer stock solution is diluted, the combined polymer diluted by flow control is added into the graded broken stone mixture at a constant speed.
The preparation method of the water-based polymer stabilized macadam base material for the road can be completed by adopting some existing stirring equipment, and the preparation process is simple.
In another embodiment of the present invention, the addition amount of the above-mentioned combined polymer is 0.4% to 1% of the dry weight of the graded crushed stone. The preparation cost of the water-based polymer stabilized macadam base material for the road can be effectively reduced while the stability, the deformation resistance, the drying shrinkage resistance and the temperature shrinkage resistance of the water-based polymer stabilized macadam base material for the road are ensured.
Wherein, when the mass ratio of the amount of the diluting water to the combined polymer is (2-1): 1 in the step 101, the water content of the road water-based polymer stabilized macadam foundation material can be satisfied by continuously adding water in the mixing process of the step 102.
In addition, the diluting water can be used in an amount which is sufficient for directly diluting the combined polymer with sufficient water according to the requirement on the water content of the roadbed material of the road water-based polymer stabilized macadam.
In addition, other esters in the combined polymer used in the above preparation method include: one or both of animal fat and oil and vegetable fat and oil.
In addition, the combined polymer used in the preparation method combines catalytic components, which comprises: enhancers, anti-aging agents, set accelerators, and demulsifiers.
In addition, the combined polymer used in the above preparation method had a density of 0.5g/cm3～3.0g/cm3. Preferably, the combined polymer density is 1g/cm3～2g/cm3。
In addition, the polymethacrylates in the combined polymer used in the preparation method comprise:
wherein, the composition range of the graded broken stone satisfies: the passing rate of a standard sieve pore of 31.5mm is 90-100%, the passing rate of a standard sieve pore of 26.5mm is 79-95%, the passing rate of a standard sieve pore of 19.0mm is 60-85%, the passing rate of a standard sieve pore of 16.0mm is 53-80%, the passing rate of a standard sieve pore of 13.2mm is 48-74%, the passing rate of a standard sieve pore of 9.5mm is 40-65%, the passing rate of a standard sieve pore of 4.75mm is 25-50%, the passing rate of a standard sieve pore of 2.36mm is 18-40%, the passing rate of a standard sieve pore of 0.6mm is 9-25%, the passing rate of a standard sieve pore of 0.3mm is 6-20%, and the passing rate;
it is worth to be noted that the crushing value of the graded broken stone is not more than 30%, and the broken stone raw material can be various types of rocks (except soft rocks); the broken stone should not contain clay blocks, plants and other harmful substances.
In graded broken stone, fine aggregate with the grain diameter not more than 2.36mm needs to meet the requirements that the liquid limit is less than 28%, the plasticity index in a humid and rainy region is preferably less than 6, the plasticity index in other regions is preferably less than 9, the sand equivalent is more than 45%, a firmness test adopts 5 cycles of sodium sulfate for 12%, and the grain content of two fracture surfaces is more than 60%. The fine aggregate can use fine screening excess materials of a gravel field, can also use fine screening excess materials of stone materials for surface treatment and penetration of rolling asphalt, and can also be machine-made stone chips, wherein the machine-made stone chips are preferred.
In graded macadam, coarse aggregate with a particle size greater than 2.36mm must meet a crush value < 26%, a los Angeles attrition value < 35%, a firmness test using sodium sulfate for 5 cycles < 12%, a particle content greater than 60% with two fractured surfaces, and a pin-and-plate particle content < 20%.
As for the crushed stones produced by different manufacturers, due to the difference of the mixture ratios of various particle sizes, in the process of preparing the water-based polymer stabilized macadam base material for roads, graded crushed stones need to be prepared according to the mixture ratios, for example, the crushed stones produced by one manufacturer are mixed crushed stones with the particle size of 10mm-30mm, mixed crushed stones with the particle size of 10 mm-20 mm, mixed crushed stones with the particle size of 5 mm-10 mm and stone chip mixed materials with the particle size of less than 4.75mm, and the graded crushed stones need to be prepared by sieving on the basis of the mixed crushed stones and the stone chip mixed materials.
In addition, on the basis of the preparation method, the method can further comprise the following steps: the water consumption is controlled so that the liquid limit of the prepared road water-based polymer stabilized macadam base material is not more than 28%, the shaping index is not more than 9, and the control of the parameters ensures that the subsequent paving operation process is simpler and the paved subbase layer or the paved base layer is more stable.
It is worth to be noted that, in the preparation process, aggregates such as the broken stones and the stone chips with different particle sizes are separated and stacked respectively, and in the stirring process, the broken stones and the stone chips with different particle sizes are quantitatively and simultaneously added into the stirring equipment.
It is worth to be noted that the preparation method can be prepared by a mixing station centralized plant mixing method, and can also be finished by a loader centralized road mixing method according to actual conditions. For road mixing, dry mixing can be carried out firstly, then the diluted combined polymer is added, then the water content is adjusted, and then the mixture is stood to blank for more than 1 hour.
In addition, the preparation process needs to be stirred uniformly, and the prepared road water-based polymer stabilized macadam base material is not allowed to have the phenomenon of separation of coarse and fine particles. And the prepared water-based polymer stabilized macadam base material for roads has a storage life of generally two days.
By combining the preparation method, the preparation process of the water-based polymer stabilized macadam base material for roads is simple and rapid, and lime and cement do not need to be added. Under the premise of keeping moisture and not compacting, the combined polymer in the water-based polymer stabilized macadam base material for the road cannot be demulsified, thereby providing convenience for construction.
As shown in fig. 2, the embodiment of the present invention provides a construction method of the water-based polymer stabilized macadam base material for roads, the water-based polymer stabilized macadam base material is laid on a road subbase layer of a road and/or laid on a road subbase layer; the construction method comprises the following steps:
step 201: paving the water-based polymer stabilized macadam base material for the road in a target area, wherein the paving coefficient meets 1.29-1.35;
step 202: compacting by rolling.
In step 201, an inorganic material spreader or a grader may be used for spreading. Step 202 may be performed by a steel wheel roller and a rubber wheel roller.
The water-based polymer stabilized macadam base material for the road is paved on a pavement underlayer of the road and/or paved on the pavement underlayer, and can be used for heavy-load traffic after being compacted for 24 hours.
In addition, after the compacting by rolling, the method may further include: the water volatilization of the compacted road water-based polymer stabilized macadam base material is realized through airing, natural air drying and vehicle rolling; after the water content of an underlayer/base course paved by the water-based polymer stabilized macadam base course material is not more than 1 percent, the compactness of the underlayer/base course reaches more than 96 percent, and the California bearing ratio CBR reaches more than 160 percent, a surface layer is paved. The rolling, airing and natural air drying are all beneficial to the volatilization of water, and meanwhile, the pressurization is beneficial to demulsification of the combined polymer, and the bonding performance of the combined polymer is improved. The water-based polymer stabilized macadam base material for the road is insensitive to construction temperature, construction is not affected by temperature, namely construction can be carried out at any time above 0 ℃, and meanwhile, rainwater construction is avoided. In addition, the modulus of resilience after the compacted subgrade is leveled is required to be more than 40 MPa. In summary, paving and compacting are a curing process of water loss and cementation, which is completely different from the water retention and humidification process of cement and the cooling and solidification process of asphalt.
When 4-5% of the cement stabilized macadam subbase layer is used as a subbase layer of the water-based polymer stabilized macadam base material layer for the road, the unconfined compressive strength UCS of 7 days of the 4-5% of the cement stabilized macadam subbase layer is required to be more than 0.8 MPa.
It is worth noting that after the compaction in step 202, no watering is needed for curing, but the curing is done without water or air drying in the sun. The strength of the base layer/subbase layer paved by the water-based polymer stabilized macadam base material is obtained by means of the embedded extrusion force after the compaction of the graded macadam and the polymer cementing force after the water volatilization demulsification. The road base layer/road subbase layer paved by the water-based polymer stabilized macadam base material can be obviously strengthened by compacting on the basis of the water content of 3.5-4.5 percent.
Meanwhile, the stability strength of the combined polymer in the water-based polymer stabilized macadam base material for the road is continuously improved along with the extension of the laying time, and when the water-based polymer stabilized macadam base material for the road is laid on a base layer, the water-based polymer stabilized macadam base material can generate a stabilizing effect with a certain thickness on an underlayer contacted with the base layer.
In addition, there are two non-acceptance criteria: the modulus of resilience (dynamic) and deflection can be used as site construction control indexes and can be used as design reference indexes and design data acquisition indexes for laying the base layer/the subbase layer to be stored as reference data after being tested. The significant difference between flexible and semi-rigid constructions for road base materials stabilized with water-based polymers is that the deflection index is relatively large. The method can be basically consistent within the design period, and the obvious increase and mutation of the deflection numerical value after the strength is attenuated can not occur.
Different compactibility and california bearing ratio can be controlled according to different pavement requirements, as shown in the following table:
in another embodiment of the present invention, the construction method may further include: curing the subbase layer/base layer paved by the road water-based polymer stabilized macadam base layer material by using coarse sand/stone chips/oil spraying/emulsified asphalt spraying to protect the surface flatness of the subbase layer/base layer paved by the road water-based polymer stabilized macadam base layer material; for spraying the penetrating layer oil or the emulsified asphalt layer, the surface is slightly dry. When the temperature is lower than 10 ℃, and the strong wind is encountered or the rainfall is about to occur, the penetrating layer oil or the emulsified asphalt layer cannot be sprayed. And the open traffic road section can be properly watered and moisturized under the condition that the weather is particularly dry and the penetrating layer oil cannot be sprayed in time. In addition, after the surface of a base layer or an underlayer paved by the water-based polymer stabilized macadam base material is dried, the whole water content of the base layer or the underlayer is less than 1 percent, and surface layer construction is carried out. The health preserving process is water evaporation health preserving without sprinkling water, and sunshine ventilation drying health preserving.
In addition, the transportation can be opened during the curing period. But the heavy vehicle passing should be limited, and the vehicle speed should not exceed 30 km/h. The surface flatness must be sacrificed when traffic is opened, and the flatness of the base layer is strictly required by spraying the penetrating oil/the emulsified asphalt layer, so that the loose surface and slight pit slots on the road surface after traffic is opened or rained are timely rolled and repaired. In addition, opening traffic in time does not affect the overall strength, but can make the base course denser.
When the coarse sand/stone chips are spread for maintenance, fine sand or stone chips with the thickness of 3 mm-5 mm can be spread immediately after the base layer/the subbase layer is flattened and compacted and before the traffic is opened, and the base layer/the subbase layer is required to be covered on the basis that the original base layer/the subbase layer cannot be seen. Wherein, the coarse sand/stone chips are selected as dry sand or stone chips with small water content and grain diameter below 3mm as much as possible, and in addition, the parts of the transportation vehicle wheels which are intensively rolled can be thicker but not more than 5 mm. After the coarse sand/stone chips are spread, the roller can be used for flattening once again. Thoroughly cleaning before paving an asphalt surface layer, and spraying penetrating layer oil after removing floating sand of a base layer/a subbase layer.
In addition, after the permeable layer oil/emulsified asphalt layer is sprayed, small crushed stones with the size of 5-10mm are uniformly spread on the permeable layer oil/emulsified asphalt layer, and the using amount of the small crushed stones is about 60-70% of that of the fully-spread layer. The base layer/sub-base layer may be exposed to light for extended periods of time. If the sprayed oil-permeable layer can penetrate into the base layer, and when the material-conveying vehicle and the surface layer mixed material spreading machine run on the base layer, the asphalt film can not be damaged, and no small broken stone can be scattered. Under the condition of spreading small gravels, an asphalt surface course is paved as early as possible.
In addition, the combined polymer is diluted by water and is uniformly mixed with the water by stirring, wherein the combined polymer comprises: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components; and mixing the diluted combined polymer with the graded broken stones, standing and sealing the materials, wherein the standing and sealing time is not less than 1 hour. May exist as part of the construction process.
In addition, if rainfall occurs during construction, the construction is stopped, the water-based polymer stabilized macadam base material is used for covering, and the natural curing time is increased by 5 mm/day according to the rainwater soaking depth. If the rainfall reaches 12 hours, the health preservation needs to be carried out in sunny days at more than 10 ℃ for two days.
When the above-described process for preparing a water-based polymer stabilized macadam base material for roads is used as part of the construction method, the combined polymer is added in an amount of not more than 0.5% by dry weight of the graded macadam.
In addition, when the process for preparing the water-based polymer stabilized macadam base material for roads is used as part of the construction method, when the mass ratio of the amount of the diluting water to the combined polymer is regulated to (2-1): 1, water is continuously added when the diluted combined polymer and the graded macadam are mixed.
Meanwhile, when the process for preparing the water-based polymer stabilized macadam base material for roads is used as part of a construction method, the using amount of water is controlled so that the prepared water-based polymer stabilized macadam base material for roads has a liquid limit not greater than 28% and a plasticity index not greater than 9.
In addition, other esters included in the combination polymer used in the above construction method may include: one or both of animal fat and oil and vegetable fat and oil;
in addition, the polymethacrylates included in the composite polymer used in the above-described construction method may include: any one or more of polymethyl methacrylate, polyethyl methacrylate and polybutyl methacrylate.
In addition, the combined catalytic component contained in the combined polymer used in the above construction method may include: enhancers, anti-aging agents, set accelerators, and demulsifiers.
Further, the density of the combined polymer used in the above-mentioned application method was 0.5g/cm3～3.0g/cm3. Preferably, it is 1g/cm3～2g/cm3。
In addition, the composition range of the graded broken stones used by the construction method meets the following requirements: the passing rate of a standard sieve pore of 31.5mm is 90-100%, the passing rate of a standard sieve pore of 26.5mm is 79-95%, the passing rate of a standard sieve pore of 19.0mm is 60-85%, the passing rate of a standard sieve pore of 16.0mm is 53-80%, the passing rate of a standard sieve pore of 13.2mm is 48-74%, the passing rate of a standard sieve pore of 9.5mm is 40-65%, the passing rate of a standard sieve pore of 4.75mm is 25-50%, the passing rate of a standard sieve pore of 2.36mm is 18-40%, the passing rate of a standard sieve pore of 0.6mm is 9-25%, the passing rate of a standard sieve pore of 0.3mm is 6-20%, and the passing rate;
it is worth noting that the strength of the base layer/sub-base layer constructed from the above-described water-based polymer stabilized macadam base material for road applications is established by both the compaction and water evaporation requirements. Thus, control of compaction and increased rate of water loss are critical controls, but the use of water-based polymers to stabilize the stone substrate material ceases without exhibiting an increase in water non-volatile strength. When the construction is rained, the water-based polymer stabilized macadam base material for roads paved before rain must be compacted and accumulated water is drained except that the mixing water content is strictly controlled. The mixture which is not compacted after paving needs to be reasonably shielded and covered. Construction in rain is not allowed.
It will be appreciated that the compaction process described above may also include edge rolling, which may employ double steel wheels and single steel wheels with steel wheel edges wider than the outside of the rubber wheel. The road section with temporarily unlimited road edges is required to be fully compacted, the edge of the road section can be reinforced by a dynamic compactor, and the outer side of the edge is required to be smooth.
The above embodiments can achieve at least the following advantages:
1. in the embodiment of the invention, because the pavement using the water-based polymer stabilized macadam base material as the paving material with the flexible structure and the water serving as the medium for conducting the combined polymer and ensuring the maximum dry density of the material has lower dry shrinkage coefficient and temperature shrinkage coefficient, wherein the dry shrinkage coefficient ranges from 7.55 x 10-5～10.16×10-5The temperature shrinkage coefficient range is 2.49 multiplied by 10-6～4.73×10-6Namely, the waterproof heat-shrinkable material has better water loss shrinkage resistance, temperature shrinkage resistance and high-temperature stability, so that the waterproof heat-shrinkable material has higher deformation resistance as a paving material. Meanwhile, the water-based polymer stabilized macadam base material for the road is a thermosetting material and cannot be softened at high temperature, so that rutting does not occur when the water-based polymer stabilized macadam base material is used for paving, and a certain cementing power is also provided on the basis of the embedded extrusion force of graded macadams, so that the fatigue resistance is ensured, and the reflection cracking of the road base is effectively prevented.
2. In the water-based polymer stabilized macadam base material for the road, the addition amount of the combined polymer is not more than 0.5 percent of the dry weight of the graded macadam, the combined polymer has a gluing effect on the graded macadam, the using amount of the combined polymer is low, the production cost of the water-based polymer stabilized macadam base material for the road can be greatly reduced, and the cost performance of the water-based polymer stabilized macadam base material for the road is improved.
3. The esters in the combined polymer enable the combined polymer to have better bonding strength and mechanical strength. In addition, the esters have long chain structures which intertwine to form a large number of molded bodies. And the micro-characteristics and the bonding strength of the colloid are determined by the winding characteristics of the long-chain structure. The plastic body is amorphous in structure because the winding direction of the ester chain is random. So that the combined polymer has better impact strength and toughness.
4. The combined catalytic component may include: the reinforcing agent, the anti-aging agent, the coagulant and the demulsifier enable the combined polymer to have better anti-aging property and thermosetting property, and simultaneously, water can be used as a transfer means to lubricate and wrap the granules with different particle sizes. Under the action of mechanical compaction, the demulsification of the combined polymer is promoted by the demulsifier, and then ester long chains in the combined polymer are interwoven together, so that the stability is enhanced along with the improvement of the compaction degree and the bonding degree.
5. The preparation method of the water-based polymer stabilized macadam base material for the road provided by the embodiment of the invention comprises the steps of diluting a combined polymer by using water, and uniformly mixing the water and the combined polymer in a stirring manner, wherein the combined polymer comprises the following components: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components; and mixing the diluted combined polymer with the graded broken stones, standing and sealing the materials, wherein the standing and sealing time is not less than 1 hour. The preparation method can be completed by adopting some existing stirring equipment, and the preparation process is simple.
6. The rolling, airing and natural air drying in the construction mode provided by the embodiment of the invention are beneficial to the volatilization of water, and meanwhile, the pressurization is beneficial to demulsification of the combined polymer, so that the bonding performance of the combined polymer is improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (9)
1. A water-based polymer stabilized macadam base material for roads, comprising: a combination polymer, graded crushed stone and water, wherein the combination polymer comprises: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components;
the combination polymer, comprising: 8 to 10 percent of propylene, 10 to 12 percent of styrene, 5 to 6 percent of lubricant, 1.5 to 3.5 percent of siloxane resin, 5 to 10 percent of polymethacrylate, 57.5 to 70 percent of other esters and 0.5 to 1 percent of combined catalytic component;
the other esters include: one or both of animal fat and oil and vegetable fat and oil;
the polymethacrylates comprise: any one or more of polymethyl methacrylate, polyethyl methacrylate and polybutyl methacrylate;
the composite catalytic component comprises: enhancers, anti-aging agents, set accelerators, and demulsifiers.
2. The water-based polymer stabilized macadam base material for roads of claim 1,
the addition amount of the combined polymer accounts for 0.4-1% of the dry weight of the graded broken stone.
3. The water-based polymer stabilized macadam base material for roads of claim 1,
the combined polymer has a density of 0.5g/cm3～3.0g/cm3。
4. The road-use water-based polymer stabilized macadam base material according to any one of claims 1 to 3,
the composition range of the graded broken stone meets the following requirements: the passing rate of a standard sieve pore of 31.5mm is 90-100%, the passing rate of a standard sieve pore of 26.5mm is 79-95%, the passing rate of a standard sieve pore of 19.0mm is 60-85%, the passing rate of a standard sieve pore of 16.0mm is 53-80%, the passing rate of a standard sieve pore of 13.2mm is 48-74%, the passing rate of a standard sieve pore of 9.5mm is 40-65%, the passing rate of a standard sieve pore of 4.75mm is 25-50%, the passing rate of a standard sieve pore of 2.36mm is 18-40%, the passing rate of a standard sieve pore of 0.6mm is 9-25%, the passing rate of a standard sieve pore of 0.3mm is 6-20%, and the passing rate;
and/or the presence of a gas in the gas,
the coarse aggregate in the graded macadam needs to meet the conditions: a crush value < 26%, a los angeles abrasion value < 35%, a firmness test using sodium sulfate 5 cycles < 12%, a content of particles with two fractured surfaces greater than 60%, a content of pin-and-plate particles < 20%;
the fine aggregate in the graded crushed stone needs to meet the conditions: liquid limit is less than 28%, plasticity index is less than 9, sand equivalent is greater than 45%, and the firmness test adopts sodium sulfate for 5 cycles and less than 12%.
5. The method of making a water-based polymer stabilized macadam base material for roads of any of claims 1 to 4, comprising:
diluting a combined polymer by using water, and uniformly mixing the water and the combined polymer by a stirring mode, wherein the combined polymer comprises: propylene, styrene, lubricants, silicone resins, polymethacrylates, other esters, and combination catalytic components;
and mixing the diluted combined polymer with the graded broken stones, standing and sealing the materials, wherein the standing and sealing time is not less than 1 hour.
6. The production method according to claim 5,
the addition amount of the combined polymer is 0.4-1% of the dry weight of the graded broken stone.
7. The production method according to claim 6,
when the mass ratio of the amount of the diluting water to the combined polymer is regulated to (2-1): 1, water is continuously added while the diluted combined polymer and the graded crushed stone are mixed.
8. The method of constructing a water-based polymer stabilized macadam base material for roads of any one of claims 1 to 4, wherein the water-based polymer stabilized macadam base material for roads is applied to a road sub-base and/or a road sub-base of a road; further comprising:
and paving the water-based polymer stabilized macadam base material for the road in a target area, wherein the paving coefficient meets 1.29-1.35, and compacting in a rolling mode.
9. The method of constructing a road-use water-based polymer stabilized macadam base material of claim 8,
after the compacting by rolling, further comprising: the water volatilization of the compacted water-based polymer stabilized macadam base material for the road is realized in the modes of airing, natural air drying and vehicle rolling;
paving a surface layer after the water content of an underlayer/base layer paved by the water-based polymer stabilized macadam base material for the road is not more than 1%, the compactness of the underlayer/base layer reaches more than 96%, and the California bearing ratio CBR reaches more than 160%;
and/or the presence of a gas in the gas,
further comprising: curing the base layer/base layer paved with the water-based polymer stabilized macadam base material for the road by using coarse sand/stone chips/penetrating oil spraying/emulsified asphalt layer spraying to protect the surface flatness of the base layer/base layer paved with the water-based polymer stabilized macadam base material for the road;
and/or the presence of a gas in the gas,
the rolling mode comprises the following steps: rolling for at least five times by using a smooth surface roller with the thickness of more than 20t, wherein the rolling speed of the first two times is 1.5-1.7 km/h, and the rolling speed of the third time is 2.0-2.5 km/h;
alternatively, the first and second electrodes may be,
the rolling mode comprises the following steps: and (3) jointly rolling for at least five times by matching a smooth road roller with more than 15 tons of rubber-tyred road rollers, wherein the rolling speed of the first two times is 1.5-1.7 km/h, the rolling speed of the third time is 2.0-2.5 km/h, the rear wheels of the rubber-tyred road rollers are overlapped by 1/3 wheel widths, and the rear wheels of the rubber-tyred road rollers exceed the joints of the two sections of rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910285107.8A CN109824301B (en) | 2019-04-10 | 2019-04-10 | Water-based polymer stabilized macadam material for roads, preparation and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910285107.8A CN109824301B (en) | 2019-04-10 | 2019-04-10 | Water-based polymer stabilized macadam material for roads, preparation and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109824301A CN109824301A (en) | 2019-05-31 |
| CN109824301B true CN109824301B (en) | 2021-06-29 |
Family
ID=66874402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910285107.8A Active CN109824301B (en) | 2019-04-10 | 2019-04-10 | Water-based polymer stabilized macadam material for roads, preparation and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109824301B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114907055B (en) * | 2022-06-10 | 2022-12-30 | 山东建筑大学 | Water-based polymer emulsion stabilized macadam material and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0931957A (en) * | 1995-07-19 | 1997-02-04 | Daiwabo Co Ltd | Reinforcing material for sand ground |
| CN100567196C (en) * | 2008-04-30 | 2009-12-09 | 陕西长大博源公路养护科技有限公司 | Handle the method that wraps material and processing building stones of bitumen macadam seal coat building stones |
| CN107268371A (en) * | 2017-07-17 | 2017-10-20 | 中国三冶集团有限公司 | A kind of dankness type Cement Treated Material and its construction method |
| CN107460801A (en) * | 2017-09-04 | 2017-12-12 | 江苏先达建设集团有限公司 | A kind of polymer SRX asphalt roads construction technologies |
| CN108439839A (en) * | 2018-03-09 | 2018-08-24 | 南京航空航天大学 | A kind of composite outer doping material and test method improving cement stabilized macadam cracking resistance |
-
2019
- 2019-04-10 CN CN201910285107.8A patent/CN109824301B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109824301A (en) | 2019-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2833027C (en) | Water-permeable and water-absorbing eco-pavement | |
| AM et al. | Development of high quality pervious concrete specifications for Maryland conditions. | |
| CN103771765A (en) | Freezing-proof bituminous mixture as well as preparation method and construction method thereof | |
| CN109824301B (en) | Water-based polymer stabilized macadam material for roads, preparation and construction method | |
| CN104176986A (en) | Low-noise asphalt pavement mixture and pavement construction quality control method | |
| CN212533589U (en) | Anti-crack roadbed and pavement structure | |
| Al-Aghbari et al. | Suitability of desert sand cement mixes for base courses in highway pavements | |
| DE60216385T2 (en) | Bitumen aggregate and method for producing a structured layer of a traffic route | |
| CN111041929A (en) | Light-emitting pervious concrete road based on recycled aggregate and construction method thereof | |
| US7335406B2 (en) | Surfaces for supporting artificial playing surfaces | |
| CN113250010B (en) | Large-particle-size asphalt macadam flexible ballast bed and construction method thereof | |
| CN115434202A (en) | Dongfeng poor-grade coral soil base layer construction method based on double-layer waterproof design | |
| RU2585769C1 (en) | Method of forming layers of road pavement of roads and city streets | |
| JPS59206502A (en) | Production of water pervious cement concrete construction | |
| CN113774749A (en) | Pavement structure construction method of dynamic square of automobile test field | |
| JP4146964B2 (en) | High-performance road structure and its construction method | |
| CN109267442A (en) | The proportion design method of vibration moulding graded broken stone | |
| Anand et al. | A Comparative Study B/W Black Cotton Soil and Alluvial Soil for Economical Pavement Design by Lime & Fly-Ash Stabilization | |
| KR100783013B1 (en) | A road packing materials | |
| RU155397U1 (en) | TRANSPORT COVER DESIGN | |
| EP2657302B1 (en) | Foam glass product for building structures and method of manufacture | |
| CN218090347U (en) | Non-disturbance type comprehensive seal layer suitable for repairing and treating pavement diseases | |
| Ulfiana et al. | The development of permeable pavement from demolished construction waste | |
| Kasikitwiwat et al. | Comparative Study of Tensile Strength Ratio of Asphalt Concrete Mixed with AC 60-70 and Polymer Modified Asphalt | |
| KR200426436Y1 (en) | A Road Packing Materials |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |