CN101514536A - Stress absorbing load bearing complex structure of high viscosity asphalt gap grading - Google Patents
Stress absorbing load bearing complex structure of high viscosity asphalt gap grading Download PDFInfo
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- CN101514536A CN101514536A CNA2009100476341A CN200910047634A CN101514536A CN 101514536 A CN101514536 A CN 101514536A CN A2009100476341 A CNA2009100476341 A CN A2009100476341A CN 200910047634 A CN200910047634 A CN 200910047634A CN 101514536 A CN101514536 A CN 101514536A
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Abstract
The invention belongs to the road engineering technical field, in particular to a stress absorbing load bearing complex structure of high viscosity asphalt gap grading. The lower layer of the complex structure layer is high viscosity asphalt gap thick grading mixture and the upper layer thereof is high viscosity asphalt gap semi-open mixture. The void fraction of the low layer mixture is 1%-4% and the low layer mixture comprises aggregate, stuffing, polymer fiber, and high viscosity modified asphalt. The void fraction of the upper layer mixture is 7%-13% and the upper layer mixture comprises aggregate, stuffing, lignin, polymer assorted fiber and high viscosity modified asphalt. The high viscosity modified asphalt used by the two mixtures comprises No. 90 matrix asphalt and defined amount additive agent. The aggregate more than 4.75 mm is coarse aggregate which is basalt, diabase and limestone. The stuffing is ground limestone powdered ore. The two mixtures are easily constructed. And the complex structure has good anti-shearing deformation performance and good resistance function for thermal contraction cracks and reflection cracks.
Description
Technical field
The invention belongs to the highway construction technical field, be specifically related to stress absorbing load bearing complex structure used in a kind of highway construction, the reflection crack problem when specifically solving old cement concrete pavement and mating formation asphaltic road-mix surface course.
Background technology
Cement pavement damage piece in various degree can occur through after a while use.On cement concrete pavement, overlay asphalt concrete pavement (" morning-night "), can improve the function of use of cement pavement, improve the planeness on road surface, be solution commonly used on the engineering.But the stretching action that causes in the contraction or the displacement of cement concrete plate horizontal direction, or the flexural tensile stress of surface layer bottom, or the vertical shearing stress located of the cement sheeting seam (crack) under action of traffic loading, all can produce reflection crack at asphalt concrete pavement, influence the application life of asphalt surface course, the destruction under low temperature condition is especially remarkable.
For effectively preventing, delay, reduce the appearance of reflection crack, generally adopt the pitch overlay of thicker (more than 15cm) on the engineering, but this engineering to urban road (being the highway section of grade elevation restriction) causes difficulty, and cost is higher.Same urban road also is not suitable for using methods such as cement sheeting fragmentation owing to reasons such as underground utilities.
In recent years the processing method of reflection crack stress absorption structure layer occurs being provided with between cement concrete slab and asphaltic road-mix surface course, as " Strata " of U.S. company, but the supporting capacity of itself is under suspicion.Under the effect of heavy traffic, " Strata " can produce distortion, the decay that is exceedingly fast of stress absorption performance.
The present invention proposes a kind of stress absorbing load bearing form of structure of two-layer compound, adopts special bituminous mixture, reach for a long time prevent, the effect in delayed reflex crack.
Summary of the invention
The stress absorbing load bearing layer structure that the highway construction that the objective of the invention is to propose a kind ofly effectively to prevent, the delayed reflex crack occurs is used.
The present invention proposes a kind of stress absorbing load bearing form of structure of two-layer compound, this composite construction is that double-deck asphaltum with high viscosity compound stress absorbing load bearing deck is compound, lower floor is that asphaltum with high viscosity is interrupted closely knit grating compound (HVDM, High-Viscosity Dense-graded asphalt Mixture), the upper strata is that asphaltum with high viscosity is interrupted half-open grating compound (HVSOM, High-Viscosity Semi-Open-graded asphalt Mixture).See accompanying drawing 1.
The closely knit grating compound of lower floor's asphaltum with high viscosity (HVDM) void content is 1～4%, by gather materials, filler, polymer fiber, high-viscosity modified asphalt form.The high-viscosity modified asphalt use amount is 8～12% of lower floor's compound gross mass.Gather materials and the filler grating sees the following form.
| Sieve aperture (mm) | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent of pass (%) | 100 | 85～100 | 53～72 | 49～67 | 44～61 | 28～42 | 21～31 | 17～25 | 13～21 | 12～18 |
HVDM adopts and is interrupted closely knit grating, and asphaltum with high viscosity and filler and fine aggregate are formed pitch water chestnut fat, fill the space that is formed by coarse aggregate.Because pitch water chestnut fat has good deformability, helps the absorption of stress.Its paving thickness is 2～3cm, and coarse aggregate is therein as the carrying main body.The HVDM of lower floor plays the effect that waterproof infiltrates through cement sheeting simultaneously.
The half-open grating compound of upper strata asphaltum with high viscosity (HVSOM) void content is 7～13%.By gather materials, filler, lignin and polymer mixed fiber, high-viscosity modified asphalt form.The high-viscosity modified asphalt use amount is 5.4～6.6% of a upper strata compound gross mass.Gather materials and the filler grating sees the following form.
| Sieve aperture (mm) | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
| Percent of pass (%) | 100 | 90～100 | 50～75 | 15～30 | 12～25 | 9～21 | 7～17 | 5～14 | 3～10 | 2～7 |
HVSOM adopts and is interrupted half-open grating, and its coarse aggregate is formed the skeleton embedding and squeezed structure, can make compound have higher structural stability; Its skeleton gap part is filled by asphaltum with high viscosity water chestnut fat, and a part has good deformability as the space of allowable strain.Its paving thickness is 3～5cm, because the void content of HVSOM own is bigger, also need overlay the waterproof wearing layer on it.
Two kinds of employed high-viscosity modified asphalts of compound are formed by 8～14% additive of No. 90 matrix pitches and matrix pitch quality up and down.Additive is the above levigate kieselguhr roast product mixture of SBS (s-B-S-triblock copolymer), Petropols and 1000 orders.Wherein SBS accounts for 50～60% of additive total amount, promptly accounts for 4～8.4% of modified bitumen gross mass.The SBS modified bitumen is at aspects such as high-temperature stability, low temperature flexibility, elastic recovery properties, sticking toughness, the advantage that all has PE and EVA modified bitumen to reach, employing Petropols and levigate kieselguhr improve the adhesion property of pitch, and the construction workability of high temperature (more than 135 ℃).
Used gathering materials greater than 4.75mm is coarse aggregate, is basalt or diabase, and gathering materials less than 4.75mm is fine aggregate, is limestone.Filler all uses levigate limestone dust.
Use the polymer fiber stabilizing agent among the HVDM, i.e. polyester fiber or polyacrylonitrile fibre, use amount is 0.2～0.3% of this layer mixture quality.Use lignin fibre and polymer fiber assorted fibre among the HVSOM.Polymer fiber is polyester fiber or polyacrylonitrile fibre, and use amount is 0.1～0.2% of this layer mixture quality.The lignin fibre use amount is 0.2～0.3% of this layer mixture quality.
Two kinds of compound easy constructions, verify through laboratory test: composite construction layer has good anti-shearing deformation performance, for warm draw seam, reflection crack good resistant function is arranged all.The supporting capacity of composite construction layer is higher than used close-graded (AC) bituminous mixture at present, far above " Strata " stress absorbing layer.
Description of drawings
Fig. 1 is the stress absorbing load bearing complex structure signal of high viscosity asphalt gap grading.
Number in the figure: 1 is old cement sheeting, and 2 is the real grating compound (HVDM) of asphaltum with high viscosity, and 3 is the half-open grating compound of asphaltum with high viscosity (HVSOM), and 4 is the waterproof wearing layer.
The specific embodiment
Embodiment:
Adopt aforesaid stresses to absorb composite construction layer.The grating of HVDM and HVSOM specifically sees the following form.
Use the 90# matrix pitch, add 10% additive, wherein SBS is 55% of an additive.High-viscosity modified asphalt and fiber consumption see the following form.(accounting for mixture quality)
| High-viscosity modified asphalt | Polyester fiber | Lignin fibre | |
| Addition among the HVDM (%) | 9.6 | 0.3 | / |
| Addition among the HVSOM (%) | 5.8 | 0.1 | 0.2 |
In this example, old cement sheeting is handled through slip casting, and HVDM thickness is 2cm, void content 2.5%, and HVSOM thickness is 4cm, void content 8.62%, the waterproof wearing layer is 4cm.
This overlay structure is feedback after use the test section, and is respond well.Pay a return visit after 1 year, reflection crack do not occur.
Claims (6)
1, a kind of stress absorbing load bearing complex structure of high viscosity asphalt gap grading, it is characterized in that: this composite construction is that double-deck asphaltum with high viscosity compound stress absorbing load bearing deck is compound, lower floor is that asphaltum with high viscosity is interrupted closely knit grating compound, and the upper strata is that asphaltum with high viscosity is interrupted half-open grating compound; Wherein:
The closely knit grating compound of described lower floor asphaltum with high viscosity, by gather materials, filler, polymer fiber, high-viscosity modified asphalt form, void content is 1～4%; Gather materials and the filler grating sees the following form:
The high-viscosity modified asphalt use amount is 8～12% of lower floor's compound gross mass;
Asphaltum with high viscosity half-open grating compound in described upper strata is made up of the assorted fibre, the high-viscosity modified asphalt that gather materials, filler, lignin fibre and polymer fiber are formed, and void content is 7～13%; Gather materials and the filler grating sees the following form:
The high-viscosity modified asphalt use amount is 5.4～6.6% of a upper strata compound gross mass;
Above-mentioned high-viscosity modified asphalt is formed by 8～14% additive of No. 90 matrix pitches and matrix pitch quality; This additive is the above levigate kieselguhr roast product mixture of s-B-S-triblock copolymer, Petropols and 1000 orders; Wherein 50～60% of s-B-S-triblock copolymer comprises additive gross mass.
2, composite construction according to claim 1 is characterized in that in described gathering materials, and gathering materials greater than 4.75mm is basalt or diabase, and gathering materials less than 4.75mm is limestone.
3, composite construction according to claim 1 is characterized in that used filler is levigate limestone dust.
4, composite construction according to claim 1 is characterized in that: used polymer fiber is polyester fiber or polyacrylonitrile fibre in lower floor's compound, and use amount is 0.2～0.3% of lower floor's mixture quality.
5, composite construction according to claim 1 is characterized in that: used assorted fibre in the compound of upper strata, and wherein polymer fiber is polyester fiber or polyacrylonitrile fibre, use amount is 0.1～0.2% of a upper strata mixture quality; The lignin fibre use amount is 0.2～0.3% of a upper strata mixture quality.
6, according to the described composite construction of claim 1, it is characterized in that: lower floor's asphaltum with high viscosity is interrupted closely knit grating compound, and paving thickness is 2～3cm; The upper strata asphaltum with high viscosity is interrupted half-open grating compound, and paving thickness is 3～5cm; On the compound of upper strata, also be equipped with the waterproof wearing layer of pitch water chestnut fat compound.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733284A (en) * | 2011-12-23 | 2012-10-17 | 上海浦东路桥建设股份有限公司 | Double-layer rubber asphalt concrete structure for inhibiting reflection cracks of pavement and pavement method |
| CN103015316A (en) * | 2012-12-26 | 2013-04-03 | 上海浦东路桥建设股份有限公司 | Asphalt concrete steel bridge pavement structure and pavement method thereof |
| CN104003656A (en) * | 2014-05-05 | 2014-08-27 | 广厦建设集团有限责任公司贵州分公司 | SMA mixture, and preparation method and application thereof |
| CN105417987A (en) * | 2015-11-10 | 2016-03-23 | 宝鸡汇德三废开发利用有限公司 | High-modulus asphalt concrete material doped with coal gasification slag and preparation method thereof |
| CN105821734A (en) * | 2016-03-28 | 2016-08-03 | 长沙理工大学 | Drainage type modified asphalt coarse aggregate discontinuous semi-open graded bituminous stabilized macadam |
| CN105926399A (en) * | 2014-06-30 | 2016-09-07 | 上海浦东路桥建设股份有限公司 | Special type gradation modified asphalt mixture surface layer and paving method thereof |
| CN106012745A (en) * | 2016-08-04 | 2016-10-12 | 广州市市政集团有限公司 | Asphalt mixture used for skid pads, and skid pad asphalt concentrate pavement |
| CN108395150A (en) * | 2018-05-02 | 2018-08-14 | 深圳海川新材料科技股份有限公司 | A kind of high modulus polymer fiber discontinuity grading asphalt and preparation method thereof |
| CN109610260A (en) * | 2018-12-24 | 2019-04-12 | 上海浦兴路桥建设工程有限公司 | A kind of penetrated asphalt pavement structure inhibiting reflection cracking in a pavement |
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2009
- 2009-03-13 CN CN2009100476341A patent/CN101514536B/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733284A (en) * | 2011-12-23 | 2012-10-17 | 上海浦东路桥建设股份有限公司 | Double-layer rubber asphalt concrete structure for inhibiting reflection cracks of pavement and pavement method |
| CN102733284B (en) * | 2011-12-23 | 2015-01-21 | 上海浦东路桥建设股份有限公司 | Double-layer rubber asphalt concrete structure for inhibiting reflection cracks of pavement and pavement method |
| CN103015316A (en) * | 2012-12-26 | 2013-04-03 | 上海浦东路桥建设股份有限公司 | Asphalt concrete steel bridge pavement structure and pavement method thereof |
| CN104003656A (en) * | 2014-05-05 | 2014-08-27 | 广厦建设集团有限责任公司贵州分公司 | SMA mixture, and preparation method and application thereof |
| CN104003656B (en) * | 2014-05-05 | 2016-01-06 | 广厦建设集团有限责任公司贵州分公司 | A kind of SMA mixture and its preparation method and application |
| CN105926399A (en) * | 2014-06-30 | 2016-09-07 | 上海浦东路桥建设股份有限公司 | Special type gradation modified asphalt mixture surface layer and paving method thereof |
| CN105417987A (en) * | 2015-11-10 | 2016-03-23 | 宝鸡汇德三废开发利用有限公司 | High-modulus asphalt concrete material doped with coal gasification slag and preparation method thereof |
| CN105821734A (en) * | 2016-03-28 | 2016-08-03 | 长沙理工大学 | Drainage type modified asphalt coarse aggregate discontinuous semi-open graded bituminous stabilized macadam |
| CN106012745A (en) * | 2016-08-04 | 2016-10-12 | 广州市市政集团有限公司 | Asphalt mixture used for skid pads, and skid pad asphalt concentrate pavement |
| CN108395150A (en) * | 2018-05-02 | 2018-08-14 | 深圳海川新材料科技股份有限公司 | A kind of high modulus polymer fiber discontinuity grading asphalt and preparation method thereof |
| CN109610260A (en) * | 2018-12-24 | 2019-04-12 | 上海浦兴路桥建设工程有限公司 | A kind of penetrated asphalt pavement structure inhibiting reflection cracking in a pavement |
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| CN101514536B (en) | 2010-08-18 |
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Effective date of registration: 20170411 Address after: 200120 Shanghai City, Pudong New Area China (Shanghai) Free Trade Zone Silver City Road No. 8, room 1401 Patentee after: SHANGHAI PUXING ROAD AND BRIDGE CONSTRUCTION ENGINEERING CO., LTD. Address before: 201210 Shanghai City, North Sichuan Road No. 3011 Patentee before: Shanghai Pudong Road Bridge Construction Co., Ltd. |
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Address after: Room 1401, 8 Yincheng Middle Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai, 200120 Patentee after: Shanghai Pudong Road & Bridge (Group) Co.,Ltd. Address before: Room 1401, 8 Yincheng Middle Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai, 200120 Patentee before: SHANGHAI PUXING ROAD & BRIDGE CONSTRUCTION ENGINEERING Co.,Ltd. |
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