CN102191736A - Rubber asphalt detritus under-sealed layer construction process - Google Patents
Rubber asphalt detritus under-sealed layer construction process Download PDFInfo
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- CN102191736A CN102191736A CN2011100415788A CN201110041578A CN102191736A CN 102191736 A CN102191736 A CN 102191736A CN 2011100415788 A CN2011100415788 A CN 2011100415788A CN 201110041578 A CN201110041578 A CN 201110041578A CN 102191736 A CN102191736 A CN 102191736A
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Abstract
The invention relates to asphalt, in particular to a rubber asphalt detritus under-sealed layer construction process. The process is characterized by comprising the following steps of: 1) cleaning a base surface; 2) spreading engineering paper at the initial and final positions; 3) spreading rubber asphalt according to a spreading route through a rubber asphalt spreading trolley at the rubber asphalt spreading quantity of 2.2kg/m<2>, wherein the spreading temperature is not less than 130 DEG C; 4) spreading detritus through a detritus spreading trolley in a distance of 5 meter according to the spreading quantity of 16kg/m<2> along the route of the rubber asphalt spreading trolley, heating the detritus to the temperature of between 150 and 160 DEG C on the sealed layer, and spreading the detritus; and 5) rolling the rubber asphalt spread by the rubber asphalt spreading trolley and the single grain detritus spread by the detritus spreading trolley by using a wheel road roller with following distance of not more than 5 meters, wherein the rolling speed is 2 to 2.5km/h. The rubber asphalt detritus under-sealed layer construction process is reasonable in the proportion of rubber and asphalt of the rubber asphalt, stable in performance and simple.
Description
Technical field
The present invention relates to pitch, particularly the rubber asphalt detritus under-sealed layer construction technology.
Background technology
Rubber powder modified asphalt obtains boundless application in the highway pavement construction, and the control of the rubber powder amount of rubber powder modified asphalt directly affects the quality of highway pavement.The rubber powder amount is too high, can increase difficulty to pavement construction, needs high-level pitch allotment simultaneously.The rubber powder amount is too low not to reach the requirement of rubber powder and asphalt pavement design.Rubber asphalt is applied in the rubber asphalt detritus under-sealed layer technology, is on sub-layer, to spray a certain amount of hot rubber asphalt, and synchronous spreading one deck single particle size rubble, rubble embeds asphalt membrane after rolling, and plays effects such as bonding, waterproof, antireflection crack.
Summary of the invention
The purpose of this invention is to provide a kind of rubber of rubber asphalt and pitch reasonable mixture ratio, stable performance, the simple rubber asphalt detritus under-sealed layer construction technology of technology.
The object of the present invention is achieved like this, and the rubber asphalt detritus under-sealed layer construction technology is characterized in that: 1) cleaning basal plane; 2) at starting and final position laying project paper; 3) carry out spreading by spreading route rubber asphalt distribution vehicle with 2.2kg/ ㎡ rubber asphalt spreading amount, the spreading temperature is not less than 130 ℃; 4) the rubble truck spreader is at a distance of 5 meters subsequently, and the spreading amount of pressing 16 ㎏/㎡ is along rubber asphalt distribution vehicle route spreading, and seal is heated to 150-160 ℃ with rubble and carries out spreading; 5) distance that accompanies of tire roller is not more than that 5m spills the rubber asphalt of cloth to the rubber asphalt distribution vehicle and the simple grain level rubble of rubble truck spreader spreading rolls rolling speed 2-2.5 km/h.
Rubber asphalt will reach 50% to the rate of wrapping of rubble after described the rolling.
Advantage of the present invention is: rubber asphalt has good water proofing property and high deformability, and it can absorb the concentrated stress of location of cracks, effectively solves the reflection crack problem of cement concrete bridge deck, can realize interlaminar bonding, waterproof etc. simultaneously.Because the rubber performance of scrap gum is relevant with carbon black; therefore; the quality of Rubber-Asphalt Pavement is also relevant with carbon black; in order to realize that the scrap gum of different performance is made full use of, reach the pavement construction requirement simultaneously, pass through to increase amount of carbon blacks among the present invention; adjust rubber property; can reach the purpose that different scrap gums are used, reach quality requirement simultaneously, still be that construction cost all can bring benefit from environmental protection.
Description of drawings
The invention will be further described below in conjunction with the embodiment accompanying drawing:
Fig. 1 is rubber asphalt proportioning process figure;
Fig. 2 is rubber and pitch proportioning viscosity and a time chart among Fig. 1.
The specific embodiment
One, raw-material choosing,
1) scrap gum
The used scrap gum of rubber asphalt is made up of the scrap gum of junked tire and high natural rubber content.Scrap gum should not contain steel wire, fiber and other impurity, and the content of steel wire must not surpass 0.01%, and the content of other impurity should approach zero.In order to prevent cohering of scrap gum, suitably add a small amount of calcium carbonate or French chalk, but its consumption must not surpass 3% of CRM quality.
The scrap gum specification is 20 orders (0.83mm), detects through overtesting, and its every index all satisfies technical requirements.(seeing table 1, table 2, table 3 for details)
Table 1 scrap gum grating percent of pass (%)
| Screen size | Screening result | Technical requirements |
| 2.36 |
100 | 100 |
| 1.18mm | 99.4 | 70-100 |
| 600 mm | 65.4 | 25-100 |
| 300 mm | 28.0 | 0-45 |
| 75 mm | 4.8 | 0-5 |
Table 2 scrap gum chemical composition test summary sheet
| Pilot project | Result of the test | Lower limit | The upper limit |
| Acetone extract (%) | 8.9 | 6.0 | 16.0 |
| Rubber hydrocarbon content (%) | 48 | 42.0 | 65.0 |
| Natural gum content (%) | 36 | 22.0 | 39 |
| Carbon black content (%) | 34 | 28.0 | 38.0 |
| Ash content kg/m 3 | 0.4 | --—— | 8.0 |
Table 3 scrap gum physical characteristic technical indicator
| Pilot project | Result of the test | Required value |
| Water content is not more than (%) | 0.45 | 0.75 |
| The ferrous metal granule content is not more than (%) | 0 | 0.01 |
| Fiber content is not more than (%) | 0 | 0.05 |
Because the rubber performance of scrap gum is relevant with carbon black, therefore, the quality of Rubber-Asphalt Pavement is also relevant with carbon black, in order to realize that the scrap gum of different performance is made full use of, reach the pavement construction requirement simultaneously, 20% scrap gum volume can participate in carbon black and natural gum, reaches the pavement construction requirement.
2) matrix pitch
Matrix pitch should be chosen the area of weather unanimity, and harder matrix pitch is selected in the area of heat for use, then selects softer matrix pitch for use for colder area.But because the temperature sensitivity of rubber asphalt cementing agent is lower, it can be strict unlike plain asphalt to the requirement of matrix pitch stiffness.In China, can select the matrix pitch of rubber asphalt by table 4.
The selection of table 4 matrix pitch
| The climatic province | The hot-zone | Warm area | Han Qu |
| The pitch label | 50-70 pitch | 70-90 pitch | 90-110 pitch |
In the airport expressway of Xianyang, the airport, Xianyang belongs to warm area, No. 70 bi tumenf orr oads of the Kunlun board A level that adopt Kelamayi, Xinjiang petro-chemical corporation to produce in this project.The correlation technique index all satisfies code requirement (seeing table 5 for details).
No. 70 bi tumenf orr oad technical indicators of table 5 A level
3) simple grain level rubble
Simple grain level rubble can be selected the limestone gravel of 9.5-13.2mm for use, and simple grain level rubble is heated to 150-160 ℃ through pitch batching plant dust suction oven dry, and simple grain level rubble appearance is even, can form the antiskid top layer, reduces building stones and scatters and disappears.After batching plant heating dedusting, with rubber asphalt better adhesion stress is arranged, it is as follows that rubble specifically detects index:
Table 6 technical indicator of gathering materials
| Index | Test value | Required value |
| The apparent density of gathering materials (g/cm 3） | 2.736 | ≥2.5 |
| The crush values of gathering materials (%) | 15.7 | ≤20 |
| Soundness (%) | 1.2 | ≤12 |
| Los Angeles abrasion loss (%) | 18.6 | ≤30 |
| Aggregate water absorption (%) | 0.55 | ≤3.0 |
| Faller gill shape content (%) | 6.5 | ≤15 |
| Adhesiveness (level) with |
5 | ≥5 |
| Soft rock content (%) | 1.2 | ≤3 |
Rubber, pitch and the simple grain level rubble process equipment by rubber asphalt is mixed than forming rubber asphalt, its technology as shown in Figure 1:
1) pitch mixes and stirs the oven dry of simple grain level rubble and is heated to 150-160 ℃;
2) pitch and the rubber after batching plant heating dedusting is heated to 160
oC carries high speed shear agitator mix, and is rapidly heated to 190
oC; Be cooled to 177 then
oThe environment down cut of C is delivered to the reaction that retort was carried out 45 minutes at least, and is warmed up to 200
oC constructs.
Rubber, pitch and simple grain level rubble comprise following capital equipment by the process equipment of rubber asphalt: pitch holding vessel, asphalt heater, scrap gum charging gear, pitch and scrap gum mixing apparatus, pitch and scrap gum retort.The temperature of rubber asphalt cementing agent, stirring and reaction time are the three big key elements that influence the rubber asphalt quality of production in this activities.
Rubber asphalt if do not use within 4 hours, should stop heating after 45 minutes reaction, allow it freely to cool off, but needs to be heated to the temperature of regulation before use again.Be heated to serviceability temperature again after the rubber asphalt cooling and be called a heat cycles, rubber asphalt allows two heat cycles, and reaches the viscosity requirement after testing.If viscosity does not reach the designing requirement scope, can additionally add 10% left and right sides scrap gum again, and under the temperature of regulation, mix and grow 45 minutes generation rubber asphalts.Utilize the said ratio rubber asphalt to carry out rubber asphalt detritus under-sealed layer technique,
1) cleaning basal plane;
2) at starting and final position laying project paper;
3) carry out spreading by spreading route rubber asphalt distribution vehicle with 2.2kg/ ㎡ rubber asphalt spreading amount, the spreading temperature is not less than 130 ℃;
4) the rubble truck spreader is at a distance of 5 meters subsequently, and the spreading amount of pressing 16 ㎏/㎡ is along rubber asphalt distribution vehicle route spreading, and seal is heated to 150-160 ℃ with rubble and carries out spreading;
5) distance that accompanies of tire roller is not more than that 5m spills the rubber asphalt of cloth to the rubber asphalt distribution vehicle and the simple grain level rubble of rubble truck spreader spreading rolls rolling speed 2-2.5 km/h.
Rubber asphalt will reach 50% to the rate of wrapping of rubble after described the rolling.
Because the high-load of scrap gum mainly is subjected to the restriction of construction workability, 22% high volume scrap gum, its k value is too big, is unfavorable for practical operation.The pitch of 18% and 20% scrap gum volume, from above data, every index all meets the demands, the main distinction: the pitch viscosity value of 18% scrap gum volume is less than normal, the pitch viscosity value of 20% volume is bigger than normal, determine to select for use 20% scrap gum volume, reason is that the higher rubber asphalt of k value can refinforced cement concrete bridge floor and the adhesion stress of flexible pavement.
Be as the criterion with 20% scrap gum volume, determine mixing time, as Fig. 2 and shown in Figure 8,
177 ℃ of viscositys of table 8 and time relationship (volume 20%)
| Time/min | 15 | 30 | 45 | 60 | 75 | 90 | 105 | 120 |
| Viscosity/Pas | 3.1 | 3.4 | 4.0 | 4.2 | 4.4 | 4.4 | 4.5 | 4.4 |
| Time/min | 135 | 150 | 165 | 180 | 195 | 210 | 225 | 240 |
| Viscosity/Pas | 4.2 | 4.1 | 4.2 | 4.1 | 4.0 | 3.9 | 3.8 | 3.7 |
Result of the test as can be seen, k value increased progressively with mixing time at preceding 60 minutes, a period of time fluctuates among a small circle thereafter, and a downward trend is arranged at last.60 minutes mixing time can make rubber fully be distributed in the pitch, and the character of rubber asphalt is more stable.Therefore the mixing time with rubber asphalt is defined as 60min.
Claims (2)
1. the rubber asphalt detritus under-sealed layer construction technology is characterized in that: 1) cleaning basal plane; 2) at starting and final position laying project paper; 3) carry out spreading by spreading route rubber asphalt distribution vehicle with 2.2kg/ ㎡ rubber asphalt spreading amount, the spreading temperature is not less than 130 ℃; 4) the rubble truck spreader is at a distance of 5 meters subsequently, and the spreading amount of pressing 16 ㎏/㎡ is along rubber asphalt distribution vehicle route spreading, and seal is heated to 150-160 ℃ with rubble and carries out spreading; 5) distance that accompanies of tire roller is not more than that 5m spills the rubber asphalt of cloth to the rubber asphalt distribution vehicle and the simple grain level rubble of rubble truck spreader spreading rolls rolling speed 2-2.5 km/h.
2. rubber asphalt detritus under-sealed layer construction technology according to claim 1 is characterized in that: rubber asphalt will reach 50% to the rate of wrapping of rubble after described the rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100415788A CN102191736A (en) | 2009-08-27 | 2009-08-27 | Rubber asphalt detritus under-sealed layer construction process |
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|---|---|---|---|
| CN2011100415788A CN102191736A (en) | 2009-08-27 | 2009-08-27 | Rubber asphalt detritus under-sealed layer construction process |
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|---|---|---|---|
| CN2009100236973A Division CN101649121B (en) | 2009-08-27 | 2009-08-27 | Rubber asphalt proportioning method and rubber asphalt detritus under-sealed layer technique |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015303A (en) * | 2012-12-13 | 2013-04-03 | 华南理工大学 | Construction method for restoring surface structure and cracks on asphalt pavement |
| CN103334364A (en) * | 2013-06-25 | 2013-10-02 | 肇庆俊富纤网材料有限公司 | Micro-surface pavement structure and micro-surface pavement construction method |
| CN104389255A (en) * | 2014-12-08 | 2015-03-04 | 中国人民解放军72719部队 | Asphalt road pavement method |
-
2009
- 2009-08-27 CN CN2011100415788A patent/CN102191736A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015303A (en) * | 2012-12-13 | 2013-04-03 | 华南理工大学 | Construction method for restoring surface structure and cracks on asphalt pavement |
| CN103015303B (en) * | 2012-12-13 | 2015-06-03 | 华南理工大学 | Construction method for restoring surface structure and cracks on asphalt pavement |
| CN103334364A (en) * | 2013-06-25 | 2013-10-02 | 肇庆俊富纤网材料有限公司 | Micro-surface pavement structure and micro-surface pavement construction method |
| CN103334364B (en) * | 2013-06-25 | 2016-09-07 | 肇庆俊富纤网材料有限公司 | Micro-table pavement structure and micro-table pavement construction method |
| CN104389255A (en) * | 2014-12-08 | 2015-03-04 | 中国人民解放军72719部队 | Asphalt road pavement method |
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Application publication date: 20110921 |