CN103864374B - Half-flexible pavement base material and preparation method thereof - Google Patents
Half-flexible pavement base material and preparation method thereof Download PDFInfo
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- CN103864374B CN103864374B CN201210526642.6A CN201210526642A CN103864374B CN 103864374 B CN103864374 B CN 103864374B CN 201210526642 A CN201210526642 A CN 201210526642A CN 103864374 B CN103864374 B CN 103864374B
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- STCOOQWBFONSKY-UHFFFAOYSA-N Tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 2
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Abstract
The present invention relates to a kind of half-flexible pavement base material and preparation method thereof; By gathering materials: 20% ~ 75%, Cement-Emulsified Asphalt mortar: 22% ~ 75%, water: 1% ~ 8% forms; By adjusting the compatibleness of cement, emulsified bitumen, the composition gathered materials and each storeroom, optimize, improve cement, emulsified bitumen and adherence state between gathering materials and molding structure, thus make half-flexible pavement base layer structure obtain desirable rigidity and flexibility, improve its Rut resistance and cracking resistance ability, improve its anti-water damage property and anti-fatigue performance; Half-flexible pavement base material of the present invention and preparation method thereof, be mainly used in the newly-built and renovation of high-grade highway, urban road, be particularly useful for the section that Heavy Traffic road, intersection, road climb and fall, bus stop, public transportation lane etc. easily produce rut.
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 for advantage, becomes the prevailing model of Pavement Structure Design with its excellent supporting capacity and low cost gradually.But through construction and the operation inspection of driving a vehicle of decades, prove that this pavement structure fragility is large, interior drainage poor performance, non-deformability is poor, to envrionment temperature and humidity change comparatively sensitivity, easily produces crack and upwards runs through gradually, producing reflection crack.Meanwhile, because the current volume of traffic constantly increases, heavily loaded overloading is serious, and most of thickness of bituminous surface is 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 comparison is flexible pavement basic unit widely.This Pavement Base Structure has more excellent planeness compared with semi-rigid type base, can provide safe, comfortable, durable rideability, significantly can 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 comparatively large, 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, following two classes are mainly contained: the first kind is filling type sand-cement slurry asphalt concrete structure: will there is specific grating and pour into a kind of pavement structure formed in the space of the open gradation asphalt of porous containing the sand-cement slurry of special additive; Equations of The Second Kind is cement-emulsified bitulith: in cold mixing Emulsified Asphalt Mixture or emulsified bitumen regeneration old asphalt mixture parent, mix cement or sand-cement slurry again through a kind of pavement structure of cold mixing, cold-application.
Self-inflow type semi-flexible composite pavement disclosed in CN101857401A and constructional method thereof, relate to open gradation porous asphalt structural sheet and be filled in the road surface mortar in porous asphalt hole.Disclosed in CN101700970A, a kind of rubber-cement grouting material being applied to half-flexible pavement, comprises the components such as cement, flyash, swelling agent, rubber powder, sand, water reducer, hardening accelerator and water.Disclosed in CN102276199A, a kind of cement-emulsified asphalt self-permeation grouting material being applied to half-flexible pavement, comprises the components such as cement, mineral admixture, swelling agent, river sand, water reducer, water, emulsified bitumen.A kind of water conservation temperature reduction half-flexible pavement and constructional method thereof disclosed in CN101581066A, 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.A kind of half-flexible water drainage skid-free noise-reducing road surface pavement structure disclosed in CN101187193A, 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.Semi-flexible pavement injection grout disclosed in CN101693611A, by ordinary Portland cement, water, water reducer, the raw material such as swelling agent, air entrapment agent is made.A kind of half flexbile base material and preparation method disclosed in CN101864717A, half flexbile base material is made up of components such as aggregate, cement, SBS modified emulsifying asphalts.The disclosed half-flexible pavement strengthened of US2004/0101365Al, by porosity be 20% ~ 40% porous asphalt concrete 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.The design of Supporting Load Pavement structure disclosed in US2008/0287570A1 and application method, Supporting Load Pavement structure comprises the grouting mixture composition of open gradation brea bed and strengthening reinforcing brea bed.Its grouting mixture comprises cement, sand and cement etc.The half flexible multi-layered structure that paves disclosed in EP2202359A1, 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 form macrovoid embedded squeezing structure by the aggregate of open gradation asphalt, and starches acting in conjunction with institute priming charge earth rubber and form intensity.This pavement structure not only has stronger rigidity, but also has excellent 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 and finally form uniform spacial framework with bituminous cements, thus cause pitch, cement slurry, 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 volume the 4th phase in 1998 " research of a cement one emulsified bitumen composite pavement material " literary composition, 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).On damaged road surface cold renewal disclosed in CN101736675A, basic unit's forming method and Cooling-recycling material 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 for hardening of cement condensation, can solve the contradiction that emulsified bitumen breakdown of emulsion " hydrophobic " and hydrated cementitious " need water " preferably; 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, its material composition and compatibleness all play decisive role to the performance (adaptability that anti-rut behavior, anti-fatigue performance, water resistant are damaged performance and changed envrionment temperature and humidity) after the de-emulsification speed of cement-emulsified asphalt slurry, condense speed and hardened forming.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 affect because of the compatibleness of each storeroom, its performance is caused 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, fully can not fill the space between gathering materials, and then not reach desirable water shutoff effect; 2. cement and emulsified bitumen could not interweave formation spacial framework well, can not be formed gathering materials and effectively wrap up in attached and adhesion, thus causing cement-emulsified bitulith material monolithic lack of homogeneity, cohesive strength is lower, lower compressive strength, endurance quality are not enough.
The cement emulsified asphalt mortar that high-speed railway generally uses mainly is 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 evenly shaping, meanwhile, due to emulsified bitumen contained in these two kinds of mortars and flexible filler 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 adjusting the compatibleness of cement-emulsified asphalt slurry, the composition gathered materials and each storeroom, optimize, improve cement-emulsified asphalt slurry and adherence state between gathering materials and molding structure, thus make half-flexible pavement base layer structure obtain desirable rigidity and flexibility, improve its Rut resistance 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%
Describedly to gather 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 JTGF40-2004 " standard specification for construction and acceptance of highway asphalt pavement ".
The synthesis proportioning of wherein gathering materials corresponds 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%.
Gathering materials of specific grating that what technique scheme provided have 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 condensation, sclerosis, the processes such as intertexture, form second skeleton structure with spacial framework gradually, and the first skeleton structure is filled, parcel, thus formed homogeneous, closely knit, the one-piece construction that space is closed, effectively can 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 its material composition and compatibleness are to denseness, de-emulsification speed, the condensation speed of cement-emulsified asphalt slurry and all play decisive role with the performance (adaptability that anti-rut behavior, anti-fatigue performance, water resistant are damaged performance and changed envrionment temperature and humidity) after the adherence state of gathering materials and hardened forming.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 meets the one in No. 50, JTGF40-2004 " standard specification for construction and acceptance of highway asphalt pavement " A level or No. 70 or No. 90 road bitumens; Described emulsifying agent for disclosed in patent CN101745340A with monoamine or polyamines and carbonatoms be 12 ~ 18 straight or branched alkyl acid or naphthenic acid at 150 ~ 250 DEG C, react 2 ~ 10 hours, generate amides or imidazolines intermediate through condensation dehydration, and generate corresponding hydrochloride to 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 be 12 ~ 18 straight or branched alkyl acid be the composition of laurostearic acid, palmitic acid, oleic acid, one or more components stearic; Naphthenic acid is saturated single 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 of one or more components met 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.By selecting cement material of different nature, thus regulating cement to the compatibleness of building stones, emulsified bitumen, construction workability and condensation molding time, improving half-flexible pavement base material to the adaptability of different construction environment.
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 polyacrylonitrile fibre, the weight-average molecular weight of 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: 1. improve the snappiness of half-flexible pavement base material, shock resistance, fatigue resistance and weather resistance; 2. regulate denseness and the degree of mobilization of cement-emulsified asphalt slurry, avoid cement-emulsified asphalt slurry to produce sedimentation layering, avoid because of the factors such as envrionment temperature is low, setting and harden is slow impact, excreting water phenomenon occurring in construction process.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 JTGF40-2004 " 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 the mixture of one or more 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%; 45 μm of upper surplus≤0.8% of sieve.
In cement-emulsified asphalt slurry, add the fillers such as breeze, waste Crumb rubber, aerosil, its effect is filled the spacial framework of cement-hydrate, 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 preparing cement-emulsified bitulith comprises the steps:
A) fragmentation, screening are carried out to mineral aggregate, and coarse aggregate, fine aggregate are mixed according to a certain percentage, obtain required formate gradation composition, stack stand-by.
B) matrix pitch accounting 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 accounting for emulsified bitumen weight 20% ~ 40%, is heated to 40 DEG C ~ 60 DEG C, adopts hydrochloric acid to regulate its pH value to be 3 ~ 4, makes emulsion for subsequent use; Above-mentioned emulsion and matrix pitch are passed through colloidal mill in the lump, makes modified emulsifying asphalt through circulation shear.
C) according to the proportioning of each material of cement-emulsified asphalt slurry, modified emulsifying asphalt, cement, fiber, filler, auxiliary agent are stirred through paddle agitator, makes cement emulsified asphalt mortar for subsequent use.
D) adopt will gather materials with the mixing tank stirred, cement-emulsified asphalt slurry, water stirs, 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 to gather materials formation first main body framework structure with half open gradation, effectively wrap up gathering materials with cement emulsified asphalt mortar, bond, and its space is fully filled, form homogeneous, closely knit, that space is closed one-piece construction; 2. cement gel can form the second skeleton structure of spacial framework gradually by condensation, sclerosis, the flexible materialss such as bituminous cements, modification rubber cement, fiber and the waste Crumb rubber particulate of simultaneously being separated out by breakdown of emulsion again are fully filled, thus 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. to gather materials formation first main body framework structure with half open gradation, be the second skeleton structure with cement gel by condensation, the spacial framework that formed gradually of hardening, there is Rut resistance, compressive property well.The bituminous cements of 2. separating out with breakdown of emulsion, modification rubber cement, fiber and waste Crumb rubber particulate carry out filling to the spacial framework of cement gel by condensation, sclerosis and interweave for flexible materials, form homogeneous, closely knit, that space is closed one-piece construction, effectively can improve the snappiness of road surface base layer material, water resistant damageability, fatigue resistance and weather resistance.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, the contradiction that emulsified bitumen breakdown of emulsion " hydrophobic " and hydrated cementitious " need water " is efficiently solved.
Embodiment
Embodiment 1 ~ 12
1) determination of aggregate grading
Carry out fragmentation, screening to mineral aggregate, 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 prepares 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, is heated to 130 DEG C ~ 160 DEG C heat preservation for standby use by the matrix pitch accounting for emulsified bitumen 50% ~ 65%; By accounting for the asphalt emulsifier of emulsified bitumen 1% ~ 3%, the modification rubber cement of 3% ~ 10% is dissolved in the water accounting for emulsified bitumen 20% ~ 40%, is heated to 40 DEG C ~ 60 DEG C, adopts hydrochloric acid to regulate its pH value to be 3 ~ 4, makes emulsion for subsequent use; Above-mentioned emulsion and matrix pitch are passed through colloidal mill in the lump, makes 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 prepares 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 each material of half-flexible pavement base material of the present invention, employing will be gathered materials with the mixing tank stirred, 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 (5)
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%;
Described synthesis proportioning of gathering materials corresponds 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%;
Described cement-emulsified asphalt slurry is made up of following each component, the weight percent of each component:
Described emulsified bitumen comprises the weight percent of following each component and each component:
Wherein, described matrix pitch meets the one in No. 50, JTGF40-2004 " standard specification for construction and acceptance of highway asphalt pavement " A level or No. 70 or No. 90 road bitumens; Described emulsifying agent be with monoamine or polyamines and carbonatoms be 12 ~ 18 straight or branched alkyl acid or naphthenic acid at 150 ~ 250 DEG C, react 2-10 hours, generate amides or imidazolines intermediate through condensation dehydration, and generate corresponding hydrochloride to 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 be 12 ~ 18 straight or branched alkyl acid be the composition of laurostearic acid, palmitic acid, oleic acid, one or more components stearic; Naphthenic acid is saturated single 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.
2. half-flexible pavement base material according to claim 1, is characterized in that: described cement is the composition of one or more components met 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.
3. half-flexible pavement base material according to claim 1, 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 JTGF40-2004 " 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 the mixture of one or more 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%, 45 μm of upper surplus≤0.8% of sieve.
4. half-flexible pavement base material according to claim 1, 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.
5. 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) fragmentation, screening are carried out to mineral aggregate, and coarse aggregate, fine aggregate are mixed in proportion, obtain required formate gradation composition, stack stand-by;
B) matrix pitch accounting 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 accounting for emulsified bitumen weight 20% ~ 40%, is heated to 40 DEG C ~ 60 DEG C, adopts hydrochloric acid to regulate its pH value to be 3 ~ 4, makes emulsion for subsequent use; Above-mentioned emulsion and matrix pitch are passed through colloidal mill in the lump, makes modified emulsifying asphalt through circulation shear;
C) according to the proportioning of 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 will gather materials with the mixing tank stirred, cement-emulsified asphalt slurry, water stirs, and paves into that 5 ~ 10cm is thick, compacting through paver, health 7 ~ 15 days and reach final set.
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