CN103864374A - Semi-flexible pavement base material and preparation method thereof - Google Patents
Semi-flexible pavement base material and preparation method thereof Download PDFInfo
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- CN103864374A CN103864374A CN201210526642.6A CN201210526642A CN103864374A CN 103864374 A CN103864374 A CN 103864374A CN 201210526642 A CN201210526642 A CN 201210526642A CN 103864374 A CN103864374 A CN 103864374A
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Landscapes
- Road Paving Structures (AREA)
Abstract
The invention relates to a semi-flexible pavement base material and a preparation method thereof; the method comprises the following steps of (1) aggregate: 20% -75%, cement-emulsified asphalt mortar: 22% -75%, water: 1% -8%; the composition of cement, emulsified asphalt and aggregate and the compatibility among all materials are adjusted and optimized, and the adhesion state and the forming structure among the cement, the emulsified asphalt and the aggregate are improved, so that the semi-flexible pavement base structure obtains ideal rigidity and flexibility, the track resistance and the crack resistance of the semi-flexible pavement base structure are improved, and the water damage resistance and the fatigue resistance of the semi-flexible pavement base structure are improved; the semi-flexible pavement base material and the preparation method thereof are mainly applied to the new construction and renovation of high-grade highways and urban roads, and are particularly suitable for road sections which are easy to generate ruts, such as heavy-duty traffic roads, road intersections, uphill and downhill roads, bus stops, bus lanes and the like.
Description
Technical field
The present invention relates to road pavement material, be specifically related to a kind of half-flexible pavement base material and preparation method thereof.
Background technology
Along with the develop rapidly of China Higher level road construction, semi-rigid type base, taking its good supporting capacity and low cost as advantage, becomes the prevailing model of Pavement Structure Design gradually.But through the construction and driving operation inspection of decades, prove that this pavement structure fragility is large, interior drainage poor performance, non-deformability is poor, and envrionment temperature and humidity are changed to comparatively sensitivity, easily produces crack and upwards runs through gradually, produces reflection crack.Meanwhile, because the current volume of traffic constantly increases, heavily loaded overloading is serious, and most of thickness of bituminous surface are thinner in addition, causes active service road surface just occurring very seriously earlier period damage less than design period.In the high grade pavement design of the state such as Japanese, American-European, application is flexible pavement basic unit more widely.This Pavement Base Structure has better planeness compared with semi-rigid type base, and safe, comfortable, durable rideability can be provided, and can significantly reduce reflection crack, eliminates the earlier period damage phenomenon of Semi-rigid Road Base Course structure.But the supporting capacity of flexible pavement basic unit is lower, its stiffness modulus can raise and reduce rapidly by Yin Wendu, and therefore, its design thickness is larger, and production cost is higher.
In order to improve the above-mentioned shortcoming of semi-rigid type base and flexbile base material, a kind of half-flexible pavement structure is arisen at the historic moment.Half-flexible pavement structure is a kind of novel road surface structure form of coupling hardness with softness just, at present, mainly contain following two classes: the first kind is filling type sand-cement slurry asphalt concrete structure: will there is specific grating and the sand-cement slurry that contains special additive and pour in the space of open gradation asphalt of porous and a kind of pavement structure forming; Equations of The Second Kind is cement-emulsified bitulith: in cold mixing Emulsified Asphalt Mixture or emulsified bitumen regeneration old asphalt mixture parent, mix a kind of pavement structure that cement or sand-cement slurry form through cold mixing, cold-application again.
The disclosed self-inflow type semi-flexible composite pavement of CN 101857401A and constructional method thereof, relate to open gradation porous asphalt structural sheet and be filled in the road surface mortar in porous asphalt hole.The disclosed a kind of rubber-cement grouting material that is applied to half-flexible pavement of CN101700970A, comprises the components such as cement, flyash, swelling agent, rubber powder, sand, water reducer, hardening accelerator and water.The disclosed a kind of cement-emulsified asphalt self-permeation grouting material that is applied to half-flexible pavement of CN 102276199A, comprises the components such as cement, mineral admixture, swelling agent, river sand, water reducer, water, emulsified bitumen.The disclosed a kind of water conservation temperature reduction half-flexible pavement of CN 101581066A and constructional method thereof, its road surface is made up of the matrix asphalt of porous, and the hole of the matrix asphalt of porous is filled by cement based water conservation rubber cement.The disclosed a kind of half-flexible water drainage skid-free noise-reducing road surface pavement structure of CN 101187193A, is made up of semi-rigid type base, modified emulsified asphalt slurry seal, perfusion half-flexible pavement material structure layer, high-viscosity modified asphalt tack coat and water drainage skid noise reduction wearing course.The disclosed semi-flexible pavement injection grout of CN 101693611A, by ordinary Portland cement, water, water reducer, the raw materials such as swelling agent, air entrapment agent are made.Disclosed a kind of half flexbile base material and the preparation method of CN 101864717A, half flexbile base material is made up of components such as aggregate, cement, SBS modified emulsifying asphalts.The half-flexible pavement of the disclosed reinforcement of US 2004/0101365Al, the porous asphalt concrete that is 20%～40% by porosity and the pulpous state matrix material that tackiness agent, additive, water, cement, SILICA FUME, flyash, sand or other fine aggregate form that comprises that is filled in space form.Design and the application method of the disclosed Supporting Load Pavement structure of US 2008/0287570A1, Supporting Load Pavement structure comprises the grouting compositions of mixtures of open gradation brea bed and strengthening reinforcing brea bed.Its grouting mixture comprises cement, sand and cement etc.The disclosed half flexible multi-layered structure that paves of EP 2202359A1, relates to a kind of by high workability sand-cement slurry perfusion open gradation macroporous asphalt multilayer pouring structure and unitized design thereof.
The common ground of above-mentioned half-flexible pavement structure is all that the aggregate by open gradation asphalt forms macrovoid embedded squeezing structure, and forms intensity with institute priming charge earth rubber slurry acting in conjunction.This pavement structure not only has stronger rigidity, but also has good flexibility, is highly resistant to rutting deformation.But also there is its weak point in this formula half-flexible pavement structure that pours into: be 1. difficult to ensure that the space of open gradation mother asphalt mixture keeps continuity, therefore, the space of open gradation mother asphalt mixture is difficult to fully be filled by sand-cement slurry; 2. sand-cement slurry can only be wrapped up indirectly to the mineral aggregate of mother asphalt mixture, can not interweave well with bituminous cements and finally form uniform spacial framework, thereby cause pitch, cement slurry, the triangular interface adhesive of gathering materials is bad.
At home and abroad, cement-emulsified bitulith half flexible materials all had correlative study, as in " silicate journal " the 26th the 4th phase of volume " research of cement one emulsified bitumen composite pavement material " literary composition in 1998, propose emulsification (rubber) pitch to wrap up in advance and invest coarse aggregate, and be scattered in the middle of cement mortar matrix, form three-phase composite material, obtain emulsification (rubber) asphalt cement concrete ground surface material (RACC).In the cold regeneration of the disclosed damaged road surface of CN101736675A, basic unit's forming method and cold twice-laid stuff unitized construction will be overhauled or discarded bituminous concrete, recovery, broken, screening, ginseng with newly gathering materials, new bituminous material, through mixing again, form reclaimed asphalt mixture, form new road surface structare layer through decking and rolling, wherein, described reclaimed asphalt mixture, is made up of mineral aggregate, cement, emulsified bitumen agglutinate.
Cement-Emulsified Asphalt concrete half flexible materials has the following advantages: the moisture in emulsified bitumen can condense for hardening of cement, has solved preferably the contradiction that emulsified bitumen breakdown of emulsion " hydrophobic " and hydrated cementitious " need water "; Cement emulsified asphalt concrete construction technology often adopts cold mixing, cold-application technology, can reduce energy consumption, saves the energy, can also reduce environmental pollution, reduces the discharge of toxic and harmful.But because the composition of this road surface base layer material is very complicated, de-emulsification speed to cement-emulsified asphalt slurry of its material composition and compatibleness, the performance after speed and hardened forming of condensing (adaptability that anti-rut performance, anti-fatigue performance, water resistant are damaged performance and envrionment temperature and humidity are changed) all play decisive role.Cement-the emulsified bitulith of open report at present, its cement and Asphalt emulsion content are generally on the low side, simultaneously or because of cement, emulsified bitumen, the composition that gathers materials, or because of the compatibleness impact of each storeroom, cause its performance not reach following requirement: 1. cement and emulsified bitumen are difficult to be thoroughly mixed to form uniform pulpous state system in the process of mixing and stirring, can not fully fill the space between gathering materials, and then not reach desirable water shutoff effect; 2. cement and the emulsified bitumen formation spacial framework that could not interweave well, can not form and effectively wrap up in attached and adhesion gathering materials, thereby cause cement-emulsified bitulith material monolithic lack of homogeneity, cohesive strength is lower, lower compressive strength, endurance quality deficiency etc.
The cement emulsified asphalt mortar generally using on high-speed railway is mainly divided into I type cement emulsified asphalt mortar (Japanese technology, low strength mortar) and II type cement emulsified asphalt mortar (Germany technology, high-strength mortar).And the degree of mobilization of these two kinds of mortars is less than normal, easily produce segregation for half-flexible pavement base material, be difficult to even moulding, meanwhile, because contained emulsified bitumen and flexible filler in these two kinds of mortars are less, after forming materials, anti-fatigue performance is lower.
Summary of the invention
The object of this invention is to provide a kind of half-flexible pavement base material and preparation method thereof.By the compatibleness of cement-emulsified asphalt slurry, the composition gathering materials and each storeroom is adjusted, is optimized, improve cement-emulsified asphalt slurry and gather materials between adherence state and molding structure, thereby make half-flexible pavement base layer structure obtain desirable rigidity and flexibility, improve its anti-rut and cracking resistance ability, improve its anti-water damage property and anti-fatigue performance.
Half-flexible pavement base material of the present invention comprises following each component and each weight percentages of components:
Gather materials: 20%～75%;
Cement-Emulsified Asphalt mortar: 22%～75%;
Water: 1%～8%
Described gathering materials for basalt or limestone or doleritic coarse aggregate and fine aggregate.Wherein the physical properties of coarse aggregate, fine aggregate should meet the corresponding technical requirements of JTG F40-2004 " standard specification for construction and acceptance of highway asphalt pavement ".
The synthetic proportioning of wherein gathering materials is corresponding to size of mesh 26.5mm, 19.0mm, 16.0mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, and percent of pass is followed successively by: 100%, 90%～100%, 60%～85%, 50%～75%, 40%～65%, 25%～40%, 10%～22%, 5%～15%, 3%～10%, 1%～5%, 0%～3%, 0%～1%.
What technique scheme provided has gathering materials of specific grating and character, by certain arrangement mode and embedded squeezing effect, form the first main body framework air gap type structure, simultaneously, cement-emulsified asphalt slurry is by condensing, sclerosis, the process such as interweave, form gradually second skeleton structure with spacial framework, and the first skeleton structure is filled, parcel, thereby formation homogeneous, closely knit, the one-piece construction of space closure, can effectively improve supporting capacity and the compressive property of half-flexible pavement base material, improve fatigue resistance and the weather resistance of road surface base layer material.
According to technical scheme provided by the invention, described cement-emulsified asphalt slurry is the main component of half-flexible pavement base material, and denseness, de-emulsification speed to cement-emulsified asphalt slurry of its material composition and compatibleness, speed and all play decisive role with the performance (adaptability that anti-rut performance, anti-fatigue performance, water resistant are damaged performance and envrionment temperature and humidity are changed) after the adherence state of gathering materials and hardened forming condenses.Cement-emulsified asphalt slurry of the present invention comprises following each component and each weight percentages of components:
Emulsified bitumen: 30%～50%;
Cement: 30%～50%;
Filler: 5%～15%;
Water: 5%～15%
Auxiliary agent: 0.01%～0.05%
Fiber: 0.05%～0.5%;
Described emulsified bitumen comprises the weight percent of following each component and each component:
Matrix pitch: 50% ~ 65%
Emulsifying agent: 1% ~ 3%
Water: 22% ~ 40%
Modification rubber cement: 3% ~ 10%
Wherein said matrix pitch is the one meeting in No. 50, JTG F40-2004 " standard specification for construction and acceptance of highway asphalt pavement " A level or No. 70 or No. 90 road bitumens; To be that patent CN 101745340A is disclosed react 2 ~ 10 hours taking monoamine or polyamines and carbonatoms as 12～18 straight or branched alkyl acid or naphthenic acid described emulsifying agent at 150～250 DEG C, generate amides or imidazolines intermediate through condensation dehydration, and generate corresponding hydrochloride with hydrochloric acid reaction; Wherein, monoamine is the composition of one or more components of Trimethylamine 99, cetylamine, stearylamine; Polyamines is the composition of one or more components of quadrol, Isosorbide-5-Nitrae butanediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine; Carbonatoms is that 12～18 straight or branched alkyl acid is the composition of laurostearic acid, palmitic acid, oleic acid, stearic one or more components; Naphthenic acid is saturated mono alicyclic carboxylic acid or saturated many alicyclic carboxylic acids, and its weight-average molecular weight is 200～520, and boiling point is: 160～350 DEG C; Described modification rubber cement is the composition of one or more components in styrene butadiene rubber latex, styrene-butadiene-styrene block copolymer latex, water-soluble polyurethane latex, aqueous epoxy resins latex, polyacrylic ester latex, its solid content is 40%～60%, and wherein the weight-average molecular weight of styrene-butadiene rubber(SBR), styrene-butadiene-styrene block copolymer, urethane, epoxy resin, polyacrylic ester is 5 ~ 150,000.
Described cement is the composition that meets one or more components in GB 175-2007/XG1-2009 " general purpose portland cement " mesosilicic acid salt cement P I, P II, ordinary Portland cement P.O, Portland blast furnace slag cement P.S, Portland pozzolana cement P.P, Portland fly ash cement P.F, composite Portland cement P.C.By selecting cement material of different nature, thereby regulate compatibleness, construction workability and the condense molding time of cement to building stones, emulsified bitumen, improve the adaptability of half-flexible pavement base material to different construction environments.
Described fiber is the composition of one or more components in polyacrylonitrile fibre, polyvinyl alcohol fiber, methyl cellulose ether, TYLOSE 30000, carboxymethyl hydrocarbon cellulose ether, cellulose ether, hydrocarbon cellulose ether.Wherein, fiber is that the weight-average molecular weight of polyacrylonitrile fibre, polyvinyl alcohol fiber, methyl cellulose ether, TYLOSE 30000, carboxymethyl hydrocarbon cellulose ether, cellulose ether, hydrocarbon cellulose ether is 1 ~ 100,000.
In cement-emulsified asphalt slurry, add fiber, have following technological merit: the snappiness, shock resistance, fatigue resistance and the weather resistance that 1. improve half-flexible pavement base material; 2. regulate denseness and the degree of mobilization of cement-emulsified asphalt slurry, avoid cement-emulsified asphalt slurry to produce sedimentation layering, avoid in construction process because excreting water phenomenon occurs in the factors such as envrionment temperature is low, setting and harden is slow impact.Wherein, optimum fiber is the good polyacrylonitrile fibre of wetting ability, polyvinyl alcohol fiber.
Described filler comprises the weight percent of following each component and each component:
Breeze: 30%～45%
Waste Crumb rubber: 30%～45%
Aerosil: 20%～30%
Wherein breeze is the composition of one or more components in limestone powder, basalt stone flour, diabase stone flour.Its physico-chemical property meets the corresponding technical requirements of JTG F40-2004 " standard specification for construction and acceptance of highway asphalt pavement ".Waste Crumb rubber is one or both the mixture in bias tire rubber powder, radial-ply tyre rubber powder, and its size can be one or more the mixture in 20 orders, 40 orders, 60 orders, 80 orders.The main character of aerosil meets: relative density 2.319～2.653g/cm
3; Dioxide-containing silica>=90%; Surplus≤0.8% on 45 μ m sieves.
In cement-emulsified asphalt slurry, add the fillers such as breeze, waste Crumb rubber, aerosil, its effect is that the spacial framework of cement-hydrate is filled, to regulate flexibility and the rigidity of half-flexible pavement base material.
Described auxiliary agent comprises the weight percent of following each component and each component:
Swelling agent 35%～50%
Defoamer 20～30%
Setting accelerator 30～40%
Wherein swelling agent is the mixture of one or more components in aluminium powder, iron powder, calcium oxide, calcium sulphoaluminate; Defoamer is the mixture of one or more components in dimethyl silicone oil, GPE10, GPE20, GPE30, tributyl phosphate; Setting accelerator is the mixture of one or more components in sodium carbonate, water glass, calcium chloride, anhydrous calcium sulphoaluminate, anhydrous sodium metaaluminate.
The method of preparing cement-emulsified bitulith comprises the steps:
A) mineral aggregate is carried out to fragmentation, screening, and coarse aggregate, fine aggregate are mixed according to a certain percentage, obtain required formate gradation composition, stack stand-by.
B) matrix pitch that accounts for emulsified bitumen weight 50%～65% is heated to 130 DEG C～160 DEG C heat preservation for standby use; By accounting for emulsified bitumen weight 1%～3% asphalt emulsifier, 3%～10% modification rubber cement is dissolved in the water that accounts for emulsified bitumen weight 20%～40%, is heated to 40 DEG C～60 DEG C, adopting hydrochloric acid to regulate its pH value is 3～4, makes emulsion for subsequent use; Above-mentioned emulsion and matrix pitch are passed through to colloidal mill in the lump, make modified emulsifying asphalt through circulation shear.
C) according to the proportioning of the each material of cement-emulsified asphalt slurry, modified emulsifying asphalt, cement, fiber, filler, auxiliary agent are stirred through paddle agitator, make cement emulsified asphalt mortar for subsequent use.
D) adopt with the mixing tank stirring will gather materials, cement-emulsified asphalt slurry, water stir, and paves into that 6～12cm is thick, compacting through paver, health 7～15 days and reach final set.
Half-flexible pavement base material of the present invention and preparation method thereof, its distinguishing feature is: 1. half-flexible pavement base material gathers materials and forms the first main body framework structure with half open gradation, effectively wrap up, bond gathering materials with cement emulsified asphalt mortar, and its space is fully filled to formation homogeneous, the one-piece construction that closely knit, space is closed; 2. cement gel is by second skeleton structure of condensing, sclerosis can form spacial framework gradually, the flexible materialss such as bituminous cements, modification rubber cement, fiber and the waste Crumb rubber particulate of being separated out by breakdown of emulsion again are fully filled simultaneously, thereby form the material that rigidity and tenderness has both.
Half-flexible pavement base material of the present invention and preparation method thereof, its beneficial effect is: 1. gather materials and form the first main body framework structure with half open gradation, the spacial framework forming gradually by condensing, hardening taking cement gel, as the second skeleton structure, has anti-rut, compressive property well.The spacial framework that bituminous cements, modification rubber cement, fiber and the waste Crumb rubber particulate of 2. separating out taking breakdown of emulsion forms by condensing, hardening cement gel as flexible materials is filled and is interweaved, form homogeneous, the one-piece construction that closely knit, space is closed, can effectively improve snappiness, water resistant damageability, fatigue resistance and the weather resistance of road surface base layer material.3. because the aquation of cement in half-flexible pavement base material and the breakdown of emulsion of emulsified bitumen carry out in same process, effectively solved the contradiction that emulsified bitumen breakdown of emulsion " hydrophobic " and hydrated cementitious " need water ".
Embodiment
Embodiment 1～12
1) determining of aggregate grading
Mineral aggregate is carried out to fragmentation, screening, and coarse aggregate, fine aggregate are mixed according to a certain percentage, obtain the synthetic aggravation of following table 1 proportioning, wherein the physical properties of coarse aggregate, fine aggregate meets the technical requirements of following table 2:
Table 1 aggregate grading scope
| Size of mesh mm | 26.5 | 19 | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Basalt percent of pass, % | 100 | 93 | 65 | 55 | 45 | 26 | 15 | 10 | 7 | 3 | 1 | 0 |
| Limestone percent of pass, % | 100 | 98 | 75 | 70 | 60 | 35 | 22 | 12 | 8 | 4 | 2 | 0 |
| Diabase percent of pass, % | 100 | 95 | 70 | 65 | 55 | 35 | 20 | 15 | 10 | 5 | 3 | 1 |
The physico-chemical property of table 2 coarse aggregate and fine aggregate
2) preparation of emulsified bitumen
According to the preparation method of half-flexible pavement base material of the present invention, raw material composition and the proportioning of preparing modified emulsifying asphalt are as shown in table 3:
Table 3 is prepared raw material composition and the proportioning of emulsified bitumen
The preparation method of modified emulsifying asphalt: according to the material proportion of above-described embodiment 1 ~ 12, the matrix pitch that accounts for emulsified bitumen 50%～65% is heated to 130 DEG C～160 DEG C heat preservation for standby use; By accounting for the asphalt emulsifier of emulsified bitumen 1%～3%, 3%～10% modification rubber cement is dissolved in the water that accounts for emulsified bitumen 20%～40%, is heated to 40 DEG C～60 DEG C, adopting hydrochloric acid to regulate its pH value is 3～4, makes emulsion for subsequent use; Above-mentioned emulsion and matrix pitch are passed through to colloidal mill in the lump, make modified emulsifying asphalt through circulation shear.Table 4 is main character of modified emulsifying asphalt:
The main character of table 4 modified emulsifying asphalt
3) preparation of cement-emulsified asphalt slurry
According to the preparation method of half-flexible pavement base material of the present invention, corresponding to above-described embodiment 1～12, prepare cement-emulsified asphalt slurry, each raw material composition and ratio and character are as shown in table 5, table 6:
Table 5 is prepared raw material composition and the proportioning of cement-emulsified asphalt slurry
The nature examination of table 6 cement asphalt mortar
4) preparation of half-flexible pavement base material
According to the proportioning of the each material of half-flexible pavement base material of the present invention, adopt with the mixing tank stirring will gather materials, Cement-Emulsified Asphalt mortar, water stir, pave into through paver that 6～12cm is thick, compacting, health 7～15 days and reach final set.
Half flexbile base material main character detection architecture is as following table 7:
The character of table 7 half-flexible pavement base material
Claims (9)
1. a half-flexible pavement base material, is characterized in that: described half-flexible pavement base material is the weight percent of following each component and each component:
Gather materials: 20%～75%
Cement-Emulsified Asphalt mortar: 22%～75%
Water: 1%～8%.
2. half-flexible pavement base material according to claim 1, it is characterized in that: described in the synthetic proportioning of gathering materials corresponding to size of mesh 26.5mm, 19.0mm, 16.0mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm, percent of pass is followed successively by: 100%, 90%～100%, 60%～85%, 50%～75%, 40%～65%, 25%～40%, 10%～22%, 5%～15%, 3%～10%, 1%～5%, 0%～3%, 0%～1%.
3. half-flexible pavement base material according to claim 1, is characterized in that: described cement-emulsified asphalt slurry is made up of following each component, the weight percent of each component:
Emulsified bitumen: 30%～50%
Cement: 30%～50%
Filler: 5%～15%
Water: 5%～15%
Auxiliary agent: 0.01%～0.05%
Fiber: 0.05%～0.5%.
4. half-flexible pavement base material according to claim 3, is characterized in that: described emulsified bitumen comprises the weight percent of following each component and each component:
Matrix pitch: 50% ~ 65%
Emulsifying agent: 1% ~ 3%
Water: 22% ~ 40%
Modification rubber cement: 3% ~ 10%
Wherein, described matrix pitch is the one meeting in No. 50, JTG F40-2004 " standard specification for construction and acceptance of highway asphalt pavement " A level or No. 70 or No. 90 road bitumens; To be that patent CN101745340A is disclosed react 2 ~ 10 hours taking monoamine or polyamines and carbonatoms as 12～18 straight or branched alkyl acid or naphthenic acid described emulsifying agent at 150～250 DEG C, generate amides or imidazolines intermediate through condensation dehydration, and generate corresponding hydrochloride with hydrochloric acid reaction; Wherein, monoamine is the composition of one or more components of Trimethylamine 99, cetylamine, stearylamine; Polyamines is the composition of one or more components of quadrol, Isosorbide-5-Nitrae butanediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine; Carbonatoms is that 12～18 straight or branched alkyl acid is the composition of laurostearic acid, palmitic acid, oleic acid, stearic one or more components; Naphthenic acid is saturated mono alicyclic carboxylic acid or saturated many alicyclic carboxylic acids, and its weight-average molecular weight is 200～520, and boiling point is: 160～350 DEG C; Described modification rubber cement is the composition of one or more components in styrene butadiene rubber latex, styrene-butadiene-styrene block copolymer latex, water-soluble polyurethane latex, aqueous epoxy resins latex, polyacrylic ester latex, its solid content is 40%～60%, and wherein the weight-average molecular weight of styrene-butadiene rubber(SBR), styrene-butadiene-styrene block copolymer, urethane, epoxy resin, polyacrylic ester is 5 ~ 150,000.
5. half-flexible pavement base material according to claim 3, is characterized in that: described cement is the composition that meets one or more components in GB175-2007/XG1-2009 " general purpose portland cement " mesosilicic acid salt cement P I, P II, ordinary Portland cement P.O, Portland blast furnace slag cement P.S, Portland pozzolana cement P.P, Portland fly ash cement P.F, composite Portland cement P.C.
6. half-flexible pavement base material according to claim 3, is characterized in that: described fiber is the composition of one or more components in polyacrylonitrile fibre, polyvinyl alcohol fiber, methyl cellulose ether, TYLOSE 30000, carboxymethyl hydrocarbon cellulose ether, cellulose ether, hydrocarbon cellulose ether; Wherein, fiber is that the weight-average molecular weight of polyacrylonitrile fibre, polyvinyl alcohol fiber, methyl cellulose ether, TYLOSE 30000, carboxymethyl hydrocarbon cellulose ether, cellulose ether, hydrocarbon cellulose ether is 1 ~ 100,000.
7. half-flexible pavement base material according to claim 3, is characterized in that: described filler is the weight percent of following each component and each component:
Breeze: 30%～45%
Waste Crumb rubber: 30%～45%
Aerosil: 20%～30%
Wherein breeze is the composition of one or more components in limestone powder, basalt stone flour, diabase stone flour, and its physical properties meets the corresponding technical requirements of JTG F40-2004 " standard specification for construction and acceptance of highway asphalt pavement "; Waste Crumb rubber is one or both the mixture in bias tire rubber powder, radial-ply tyre rubber powder, and its size is one or more the mixture in 20 orders, 40 orders, 60 orders, 80 orders; The main character of aerosil meets: relative density 2.319～2.653g/cm
3, dioxide-containing silica>=90%, surplus≤0.8% on 45 μ m sieves.
8. half-flexible pavement base material according to claim 3, is characterized in that: described auxiliary agent is the weight percent of following each component and each component:
Swelling agent 35%～50%
Defoamer 20～30%
Setting accelerator 30～40%
Wherein swelling agent is the mixture of one or more components in aluminium powder, iron powder, calcium oxide, calcium sulphoaluminate; Defoamer is the mixture of one or more components in dimethyl silicone oil, GPE10, GPE20, GPE30, tributyl phosphate; Setting accelerator is the mixture of one or more components in sodium carbonate, water glass, calcium chloride, anhydrous calcium sulphoaluminate, anhydrous sodium metaaluminate.
9. the preparation method of half-flexible pavement base material according to claim 1, is characterized in that: the preparation method of described half-flexible pavement base material comprises the steps:
A) mineral aggregate is carried out to fragmentation, screening, and coarse aggregate, fine aggregate are mixed in proportion, obtain required formate gradation composition, stack stand-by;
B) matrix pitch that accounts for emulsified bitumen weight 50%～65% is heated to 130 DEG C～160 DEG C heat preservation for standby use; By accounting for emulsified bitumen weight 1%～3% asphalt emulsifier, 3%～10% modification rubber cement is dissolved in the water that accounts for emulsified bitumen weight 20%～40%, is heated to 40 DEG C～60 DEG C, adopting hydrochloric acid to regulate its pH value is 3～4, makes emulsion for subsequent use; Above-mentioned emulsion and matrix pitch are passed through to colloidal mill in the lump, make modified emulsifying asphalt through circulation shear;
C) according to the proportioning of the each material of cement-emulsified asphalt slurry, modified emulsifying asphalt, cement, fiber, filler, auxiliary agent are stirred through paddle agitator, make cement-emulsified asphalt slurry for subsequent use;
D) adopt with the mixing tank stirring will gather materials, cement-emulsified asphalt slurry, water stir, and paves into that 5～10cm is thick, compacting through paver, health 7～15 days and reach final set.
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