CN103952959A - Surface-layer half water retention type permeable bituminous pavement - Google Patents
Surface-layer half water retention type permeable bituminous pavement Download PDFInfo
- Publication number
- CN103952959A CN103952959A CN201410213104.0A CN201410213104A CN103952959A CN 103952959 A CN103952959 A CN 103952959A CN 201410213104 A CN201410213104 A CN 201410213104A CN 103952959 A CN103952959 A CN 103952959A
- Authority
- CN
- China
- Prior art keywords
- surface layer
- water retention
- layer
- retention material
- basic unit
- 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.)
- Granted
Links
Abstract
The invention discloses a novel surface-layer half water retention type permeable bituminous pavement structure and a preparation method thereof. The novel surface-layer half water retention type permeable bituminous pavement structure comprises a permeable bituminous surface layer and a base layer, wherein the bituminous surface layer is divided into an upper surface layer which is 25-30mm thick and a lower surface layer which is 70-90mm thick; the lower surface layer which has half road breadth in the middle of a pavement is filled with a water retention material; the base layer is divided into an upper base layer and a lower base layer; the upper base layer is a bituminous gravel base layer which is 80-120mm thick, and the lower base layer is a cascaded gravel base layer which is 180-220mm thick; the water retention material is prepared by doping 15-20wt% of slaked lime and 60-80wt% of water into a powder body material consisting of 85-95wt% of blast furnace slag powder and 5-15wt% of coal ash. According to the novel surface-layer half water retention type permeable bituminous pavement structure, a quick permeable pavement and the water retention functional material on the lower surface layer are combined together; being an auxiliary of a municipal water drainage facility, the novel surface-layer half water retention type permeable bituminous pavement structure can greatly improve the capacity of an urban road for resisting flood disasters and enhancing the traffic safety, effectively reduce the temperature of the urban road, relieve the high-temperature condensation effect of the bituminous surface layer to a certain extent, delay the bituminous aging speed and prolong the service life of the pavement.
Description
Technical field
The present invention is specifically related to a kind of surface layer half water conservation formula novel water permeable asphalt pavement structure and preparation method thereof.
Background technology
Asphalt concrete pavement is one of highroad and the most important form of structure of urban road surfaces.Bituminous mixture, as main laying of roadway material, has significantly promoted driving stationarity, comfortableness, safety and the aesthetic property on road surface.Yet, raising increasingly along with urban construction requirement and resident living standard, the problems such as tradition dense-graded asphalt concrete hard surface has produced many negative effects to traffic safety and urban ecological environment, poor such as draining, noise large, rainy day driving sight line is bad and temperature concentration is strong.Therefore, design draining or water permeability asphalt road surface, can overcome the above-mentioned adverse effect that closely knit hard surface brings city, become an important directions of modern road structure development.
Drainage asphalt pavement (Drain Asphalt Pavement), claims again asphalt road surface (Porous Asphalt Concrete), is that in current porous asphalt pavement, involvement aspect is the widest, a kind of pavement design form that technical barrier is maximum.General porous asphalt pavement is that surface layer is permeable, basic unit is waterproof or surface layer basic unit is permeable, the fluid-tight road surface of bed course, this class road surface can only solve surface gathered water problem to a certain extent, itself has the deficiencies such as, Moisture Damage aggravation not penetrating such as drainability limitation, vertical structure.Meanwhile, city " heat island phenomenon " is outstanding, and it is obvious that pavement temperature gathers effect, and the strong warming characteristic of bituminous material makes it aging too fast.Therefore, urban road is necessary to take certain cooling measure.
Summary of the invention
The object of the invention is to provide a kind of surface layer half water conservation formula novel water permeable asphalt pavement structure and preparation method thereof.
A surface layer half water conservation formula asphalt paving, comprises pervious asphalt surface layer and basic unit.Wherein, described pervious asphalt surface layer is divided into the upper layer of 25-30mm and the lower surface layer of 70-90mm, and in the middle of road surface, the lower surface layer of half Road width adopts water retention material to fill; Described basic unit is divided into basic unit and goes to a grassroots level, and the Asphalt macadam subgrade that upper basic unit is 80-120mm, goes to a grassroots level as the graded broken stone base of 180-220mm.
Press such scheme, between described water retention material and basic unit, also have sealing.
Press such scheme, described sealing selects mulseal, heated bitumen or geotechnique to weave cotton cloth.
Press such scheme, if groundwater table is high, between described basic unit and roadbed, also have the sand cushion of 45-55mm.
Press such scheme, described upper basic unit and go to a grassroots level between be gutter longitudinally.
Press such scheme, described water retention material forms the powder body material (early strength of flyash major decision water retention material wherein by the blast-furnace slag powder of 85-95wt% and the flyash of 5-15wt%, in the time of need to be compared with high early strength, can suitably increase its content, but must not surpass 15% of powder total amount, thereby guarantee the water absorption character of water retention material.), mix outward and account for the slaked lime of powder 15-20wt% and the water of 60-80wt% is prepared from.
Press such scheme, in described water retention material, blast-furnace cinder average grain diameter is below 75 μ m, and specific area should be at 400kg/m
2above, and be alkalescence; Fineness of pulverized-coal ash, below 75 μ m, is I level flyash; Slaked lime should be one-level slaked lime, and in mix, pH value is greater than 11.
Press such scheme, described water retention material is the outer cement of 20-30wt% or the calcium chloride of 1wt% mixed also.
Press such scheme, described water retention material flowability 9-14s, within 7 days, compressive strength is greater than 2MPa, and rupture strength is greater than 0.5MPa, and within 30 minutes, water absorption rate is greater than 0.3g/cm
3, water retention serum reaches 1.75-1.85g/cm
3, sclerosis water retention material reaches 1.4-1.5g/cm
3.
Beneficial effect of the present invention is:
1) large-and-medium size cities are substantially all positioned at rivers alluvial plain, foundation soil mainly consists of sand gravel, possess stronger water storage drainability, its water content is little on structural stability impact, and the present invention has very important using value for Urban Road Asphalt Pavement.
2) surface layer of the present invention half water conservation formula water permeability asphalt road surface, when making not affect the penetrating drain function of water-permeable pavement, road structure itself can store the table infiltration of a certain amount of road, can effectively alleviate asphalt surface course temperature, delays the aging of pitch.
3) urban road surfaces ponding affects car traffic safety, designs auxiliary as municipal drainage facility of quick porous pavement, can greatly improve the ability that urban road is resisted flood, strengthens traffic safety.
4) in road surface structare layer, adding water-keeping material can be to a certain extent be urban cooling, and the road structure of whole-permeable links together city and ground, has strengthened city and natural water circulation, can effectively alleviate the heat island effect in city.
Accompanying drawing explanation
Fig. 1: surface layer half water conservation formula asphalt paving schematic cross-sectional view;
Wherein, 1-upper layer; Surface layer under 2-; 3-water retention material; 4-Shang basic unit; 5-goes to a grassroots level; 6-sealing; 7-longitudinal drainage pipe; 8-Sandy Soil Foundation.
The specific embodiment
Below illustrate and describe and be only used to that those skilled in the art can understand the present invention better and the embodiment that adopts is not construed as limiting protection scope of the present invention.
Shown in accompanying drawing 1, surface layer half water conservation formula asphalt paving of the present invention, comprise pervious asphalt surface layer and basic unit, wherein, described pervious asphalt surface layer is divided into the upper layer 1 of 25-30mm and the lower surface layer 2 of 70-90mm, all adopt open gradation antiskid wearing layer (Open-Grade Friction Course, OGFC) bituminous mixture, in the middle of road surface, the lower surface layer of half Road width adopts water retention material 3 to fill; Described basic unit is divided into basic unit 4 and goes to a grassroots level 5, and the Asphalt macadam subgrade that upper basic unit is 80-120mm, goes to a grassroots level as the graded broken stone base of 180-220mm, is below Sandy Soil Foundation 8.
Unlikely being penetrated in basic unit also has sealing between water retention material and basic unit when pouring into water retention material.Sealing is selected any one in mulseal, heated bitumen or geotechnological weaving cotton cloth.
If groundwater table is higher, consider the sand cushion that also has 45-55mm between antifreeze demand basic unit and roadbed.
Upper basic unit and go to a grassroots level between for gutter is longitudinally for draining.
Water retention material forms the powder body material (early strength of flyash major decision water retention material wherein by the blast-furnace slag powder of 85-95wt% and the flyash of 5-15wt%, in the time of need to be compared with high early strength, can suitably increase its content, but must not surpass 15% of powder total amount, thereby guarantee the water absorption character of water retention material.), mix outward and account for the slaked lime of powder 15-20wt% and the water of 60-80wt% composition.
Optimally, water retention material, when needs bear stronger load traffic, also can be mixed the cement of 20-30wt% or the calcium chloride of 1wt% outward in order to improve resistance to compression and rupture strength.
Optimally, in water retention material, blast-furnace cinder average grain diameter is below 75 μ m, and specific area should be at 400kg/m
2above, and be alkalescence; Fineness of pulverized-coal ash, below 75 μ m, is I level flyash; Slaked lime should be one-level slaked lime, and in mix, pH value is greater than 11.
What finally obtain meets following performance: water retention material flowability 9-14s, and within 7 days, compressive strength is greater than 2MPa, and rupture strength is greater than 0.5MPa, and within 30 minutes, water absorption rate is greater than 0.3g/cm
3, water retention serum reaches 1.75-1.85g/cm
3, sclerosis water retention material reaches 1.4-1.5g/cm
3.
Embodiment:
Below in conjunction with embodiment, further illustrate content of the present invention, but not as limiting the scope of the invention.
Asphalt paving is with reference to < < asphalt paving tecnical regulations > > (CJJ/T190-2012), < < standard specification for construction and acceptance of highway asphalt pavement > > (JTG_F40-2004), < < highway road surface construction technique normalizing > > (JTJ034-2000) relevant regulations, design the grating of upper and lower surface layer as table 1, shown in table 2, on the grating of going to a grassroots level as table 3, shown in table 4, obtain upper layer pervious asphalt void content 18.5%, lower surface layer pervious asphalt void content 20.5%, upper porous matrix layer rate is 15.3%, the porosity of going to a grassroots level is 13.2%.
Table 1 upper layer grating
Table 2 below level is joined
Gradation of base course on table 3
Table 4 grating of going to a grassroots level
According to this match ratio coordinative construction, surface layer adopts the SBS modified bitumen that bitumen aggregate ratio is 5.0%, and upper basic unit adopts No. 70 pitches of bitumen aggregate ratio 2.9%.Material is preferably selected basalt or granite, crush values≤26%, apparent relative density >=2.60.General scleroid rolling sand to substitute natural sand, apparent relative density >=2.50 of adopting of fine aggregate.Conventional filler, except conventional levigate pulverized limestone, can adopt slaked lime, cement to replace breeze sometimes, to improve pitch and the cohesiveness of gathering materials.
Below the time of maintenance about 7 days after layer construction, pour into water retention material.Water retention material preparation method and construction method are as follows:
Batching (meter by weight): blast-furnace slag powder 468 (average grain diameter 67 μ m, specific area 454kg/ ㎡), flyash 52 (I level flyash, fineness 55 μ m), slaked lime 83, water 320.
Water retention material preparation: blast-furnace slag powder, flyash and slaked lime are added to mix 3min in agitated kettle, observe mix and add load weighted water after evenly, continue to be stirred to completely and mix, the water retention serum of uniform mixing is canescence, pasty state, water retention serum after uniform mixing has good mobility, there is no caking phenomenon.
Surface layer half water conservation formula asphalt paving construction method: after base layer construction, lay one deck geotechnique in time in road midway width scope and weave cotton cloth.To press afterwards load weighted gathering materials of surface layer match ratio and drop in mixing building with pitch, at 170 ℃, mix to material mixes, and afterwards in hot lower making compacting, cooling and maintenance is after 5～7 days, the water retention material that perfusion has prepared.The mechanism that makes water retention material fill in mother asphalt mixture space is that the air in asphalt mixture gap and water retention material substitution, utilize the remaining hole water-absorbing-retaining of displacement.Promotion is " being pressed into ", " attraction ", " vibration " etc. with the mechanism of the displacement of air, the method that wherein directly makes mother asphalt mixture vibrate has the feature of the liquidation that promotes water retention material, according to result of the test, show that high-frequency plate vibration device effect is best, as filling mechanism.
First core boring sampling, measures the void content that has spread lower surface layer mother asphalt mixture.With this, as controlling the parameter of filling water retention material mortar consumption and technical indicator design, control the degree of mobilization of water retention material, to guarantee the infiltration of water retention material.The usage quantity of water retention material for infiltration, according to factor calculative determinations such as the void content of length of penetration, parent open gradation bituminous mixture and compactednesses.
Determine after consumption, prepare the water retention material of suitable mobility, on the complete lower surface layer of maintenance, take method that multiple spot pours into simultaneously to guarantee that the material of each level fills simultaneously, utilize plate vibration device that it is uniformly distributed.After having poured into, can carry out mix and the construction of upper layer, method is with lower surface layer.Afterwards maintenance a period of time again, treat that water retention material completes hydration reaction and can come into operation.
Water retention material prepared by this example is according to the characteristic index design standard of Japanese water retention material, record fluidity of slurry 11 (meeting the designing requirement of mobility 10～15), compressive strength 2.65MPa after health in 7 days, rupture strength 0.54MPa (meeting resistance to compression design load 2.5MPa, anti-folding design load 0.5MPa requires), maximum water absorption rate 0.41 (meeting design load 0.35 requires).
Claims (9)
1. a surface layer half water conservation formula asphalt paving, is characterized in that comprising pervious asphalt surface layer and basic unit.Wherein, described pervious asphalt surface layer is divided into the upper layer of 25-30mm and the lower surface layer of 70-90mm, and in the middle of road surface, the lower surface layer of half Road width adopts water retention material to fill; Described basic unit is divided into basic unit and goes to a grassroots level, and the Asphalt macadam subgrade that upper basic unit is 80-120mm, goes to a grassroots level as the graded broken stone base of 180-220mm.
2. surface layer half water conservation formula asphalt paving as claimed in claim 1, is characterized in that between described water retention material and basic unit, also having sealing.
3. surface layer half water conservation formula asphalt paving as claimed in claim 1, is characterized in that described sealing selects mulseal, heated bitumen or geotechnique to weave cotton cloth.
4. surface layer half water conservation formula asphalt paving as claimed in claim 1, if it is characterized in that, groundwater table is high, also has the sand cushion of 45-55mm between described basic unit and roadbed.
5. surface layer half water conservation formula asphalt paving as claimed in claim 1, it is characterized in that described upper basic unit and go to a grassroots level between be gutter longitudinally.
6. surface layer half water conservation formula asphalt paving as claimed in claim 1, it is characterized in that described water retention material forms powder body material by the blast-furnace slag powder of 85-95wt% and the flyash of 5-15wt%, mix outward and account for the slaked lime of powder 15-20wt% and the water of 60-80wt% is prepared from.
7. surface layer half water conservation formula asphalt paving as claimed in claim 6, is characterized in that in described water retention material, blast-furnace cinder average grain diameter is below 75 μ m, and specific area should be at 400kg/m
2above, and be alkalescence; Fineness of pulverized-coal ash, below 75 μ m, is I level flyash; Slaked lime should be one-level slaked lime, and in mix, pH value is greater than 11.
8. surface layer half water conservation formula asphalt paving as claimed in claim 6, is characterized in that described water retention material need bear stronger load traffic, also can mix the cement of 20-30wt% or the calcium chloride of 1wt% outward.
9. surface layer half water conservation formula asphalt paving as claimed in claim 6, is characterized in that described water retention material flowability 9-14s, and within 7 days, compressive strength is greater than 2MPa, and rupture strength is greater than 0.5MPa, and within 30 minutes, water absorption rate is greater than 0.3g/cm
3, water retention serum reaches 1.75-1.85g/cm
3, sclerosis water retention material reaches 1.4-1.5g/cm
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410213104.0A CN103952959B (en) | 2014-05-20 | 2014-05-20 | Surface-layer half water retention type permeable bituminous pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410213104.0A CN103952959B (en) | 2014-05-20 | 2014-05-20 | Surface-layer half water retention type permeable bituminous pavement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103952959A true CN103952959A (en) | 2014-07-30 |
| CN103952959B CN103952959B (en) | 2017-01-25 |
Family
ID=51330297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410213104.0A Expired - Fee Related CN103952959B (en) | 2014-05-20 | 2014-05-20 | Surface-layer half water retention type permeable bituminous pavement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103952959B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109629374A (en) * | 2018-12-11 | 2019-04-16 | 任冲 | A kind of cool-down method of bituminous pavement |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4801656B2 (en) * | 2007-12-27 | 2011-10-26 | 大成ロテック株式会社 | Permeable water-retaining pavement and its construction method |
| CN202359478U (en) * | 2011-12-14 | 2012-08-01 | 长安大学 | Multifunctional environmentally-friendly road surface |
| CN203049402U (en) * | 2013-01-15 | 2013-07-10 | 长安大学 | Pavement capable of lowering environmental temperature of road surface |
-
2014
- 2014-05-20 CN CN201410213104.0A patent/CN103952959B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4801656B2 (en) * | 2007-12-27 | 2011-10-26 | 大成ロテック株式会社 | Permeable water-retaining pavement and its construction method |
| CN202359478U (en) * | 2011-12-14 | 2012-08-01 | 长安大学 | Multifunctional environmentally-friendly road surface |
| CN203049402U (en) * | 2013-01-15 | 2013-07-10 | 长安大学 | Pavement capable of lowering environmental temperature of road surface |
Non-Patent Citations (2)
| Title |
|---|
| 孙高峰: "保水性沥青混合料材料组成设计及路用性能研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 赵亮: "城市透水铺装材料与结构设计研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109629374A (en) * | 2018-12-11 | 2019-04-16 | 任冲 | A kind of cool-down method of bituminous pavement |
| CN109629374B (en) * | 2018-12-11 | 2021-04-16 | 任冲 | Cooling method for asphalt pavement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103952959B (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jia et al. | The cemented material dam: a new, environmentally friendly type of dam | |
| CN104402339A (en) | Pervious concrete and construction method thereof | |
| CN204875416U (en) | Porous pavement structure | |
| CN107382358A (en) | It is a kind of suitable for permeable alkali-slag concrete of Supporting Load Pavement and preparation method thereof | |
| CN210262547U (en) | Wide structure is tied up to bituminous paving | |
| CN106116395A (en) | A kind of inorganic colloid methoder as road subbase course filler and compound method thereof | |
| CN107034767A (en) | A kind of full pervious concrete pavement structure of regeneration aggregate and its construction method | |
| Havanagi et al. | Feasibility of copper slag–fly ash–soil mix as a road construction material | |
| CN201296895Y (en) | Vertical cracking pavement repair structure | |
| RU2492290C1 (en) | Method to construct motor roads and motor road design | |
| CN207259961U (en) | A kind of Reflection Cracking type heavy traffic drainage pavement paving structure | |
| CN205368926U (en) | Garden way supercrust structure that water permeability is strong | |
| CN110714389A (en) | Ultrathin high-performance composite semi-flexible surface layer pavement structure and construction method thereof | |
| CN103243624B (en) | Construction method for salty soil district railway roadbed with water content lower than liquid limit | |
| CN107288003A (en) | A kind of road surface or preventive maintenance of deck structure and its construction method | |
| CN107721330A (en) | Permanent seal cooling Identification Beneath Concrete Slabs injecting paste material and preparation method thereof | |
| CN111608043A (en) | Semi-permeable waterway system and pavement rainwater collecting system | |
| CN204000529U (en) | Engineering asphalt pavement structure | |
| CN111549603A (en) | Pavement considering water load coupling and construction method thereof | |
| CN208594460U (en) | A kind of permeable pavement pavement structure applied to sponge urban construction | |
| CN103952959A (en) | Surface-layer half water retention type permeable bituminous pavement | |
| CN108191309B (en) | Modified roadbed silty soil and method for roadbed filling by using same | |
| CN206828912U (en) | A kind of full pervious concrete pavement structure of regeneration aggregate | |
| CN211256538U (en) | Ultrathin high-performance composite semi-flexible surface layer pavement structure | |
| CN204185743U (en) | A kind of Desulphurization roadbed cement pavement structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170125 Termination date: 20180520 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |