CN102849991A - Continuous traffic construction asphalt mixture and construction method thereof - Google Patents
Continuous traffic construction asphalt mixture and construction method thereof Download PDFInfo
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- CN102849991A CN102849991A CN201210380593XA CN201210380593A CN102849991A CN 102849991 A CN102849991 A CN 102849991A CN 201210380593X A CN201210380593X A CN 201210380593XA CN 201210380593 A CN201210380593 A CN 201210380593A CN 102849991 A CN102849991 A CN 102849991A
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Abstract
The invention relates to a continuous traffic construction asphalt mixture and a construction method of the mixture, belonging to the field of urban main road repair and maintenance technology. The continuous traffic construction asphalt mixture can be divided into two grades including type A and type B; the mixture is formed by blending the components by a weight ratio: the ratio between warm mixed asphalt binder and aggregate is (4-5): 100; and the warm mixed asphalt comprises a warm mixing agent (DAT) and modified asphalt according to the weight ratio of 4: 96. The continuous traffic construction asphalt mixture not only has the characteristics of being low in construction temperature, rapid in construction speed and easy in compaction, but also has excellent pavement performance; and the mixture disclosed by the invention can be used for repairing and maintaining the urban road, especially the main road, and is rapid in construction so as to be open to traffic, thus guaranteeing the urban road traffic to be smooth.
Description
Technical field
The present invention is a kind of material for the asphalt pavement conserving maintenance, especially is applied to the maintenance of major urban arterial highway, can not interrupt normal Urban traffic, guarantees the normal operation of Urban traffic, belongs to the technical field that the asphalt road surface material is made.
Background technology
Along with China's economic level improves constantly, the urban construction urbanization constantly advances, urban highway traffic becomes the most important Infrastructure that guarantees the city function performance, the urban construction of China is along with the growth of new China develops gradually, in succession build up as the urban road major trunk roads of the city skeleton development along with China's economic society, performance plays vital effect for city function.The development of economic society has brought the flourish of automotive industry, and vehicular load is more complicated in the city, and city bus is towards large capacity, heavily loaded future development, and intersection is because the shearing action of the starting of stopping obviously causes Asphalt Pavement Damage outstanding.The built urban road major trunk roads of China approximately 80% have adopted bituminous concrete pavement, Beijing almost is bituminous concrete pavement entirely, because the construction criteria when building is low, urban road major trunk roads in all parts of the country are owing to the reasons such as tropical island effect aggravation of complicated, the urban environment of the growth of the volume of traffic, traffic loading, the pavement track disease is remarkable, and the road occupation Quality Down is obvious.Therefore, increasing major trunk roads face overhauling reform in the urban road.
Urban road intersection is the hub site of Urban traffic, because traffic control becomes the place that various vehicles often brake, start near the crossing.Traffic control department is for improving the traffic capacity of intersection, and each crossing reduces lane width in the crossing usually, increases number of track-lines, has further aggravated the traffic channelling degree in zone, crossing.In addition, very large variation has also occured in some big city major trunk roads vehicular traffic situations, " multiaxis time, solid axle carry, high wheel load " characteristics have appearred, the crossing bituminous pavement produces and serious gathers around bag, push and the disease such as rut, often be every one or two years will milling cover again once, after new surface layer has experienced one, two summer, gather around bag, rut problem still very serious, obviously adopt the fundamentally high-temperature stability problem of solving urban road bituminous pavement of original asphalt and Pavement Structure Design control index.
Generally, need to suspend traffic a couple of days even longer time for the City Road Maintenance maintenance, bring larger pressure certainly will for like this traffic that can't bear of having blocked up.If the urban road especially maintenance of major trunk roads does not interrupt normal Urban traffic, to carry out at the night that vehicle is minimum, daytime, open to traffic then can guarantee the normal operation of Urban traffic.But of short duration engineering time window has brought suitable difficulty to the maintenance of road especially overhaul.Therefore, but but after a kind of rapid construction of exploitation, construction the asphalt of fast cooling particularly urgent, pavement maintenance can be finished in spacious not workspace within the of short duration time smoothly, can guarantee again the smooth traffic operation daytime.
Summary of the invention
The object of the present invention is to provide a kind of compound of continuous traffic construction, make this compound that preferably compaction capacity be arranged by specific grating, mix also has good Pavement Performance simultaneously at a lower temperature, realization carries on construction work at night, the purpose of the traffic that opens daytime.
The construction technology of this compound also is provided simultaneously, and this compound cooperates compaction process, makes this compound mix and stir under lower temperature, pave and roll.Than conventional hot-mix asphalt mixture, constantly the traffic construction asphalt can easier compaction moulding, and the rapid cooling down of lower construction temperature, reach carry on construction work at night, the purpose that opens traffic daytime.
Continuous traffic construction asphalt, by gathering materials and the warm-mixed asphalt binder mixes and stirs and forms the warm-mixed asphalt binder: gather materials=4 ~ 5: 100; Described grating of gathering materials be see Table 1 or table 2 in A type or Type B.
Described aggregate grading is as described in table 1 or the table 2.
Table 1 is the aggregate grading (A type) of traffic construction asphalt constantly
Table 2 is traffic construction asphalt mixture gradation (Type B) constantly
Warm-mixed asphalt is warm-mixing agent (DAT) by weight ratio: pitch=4:96 forms;
Wherein, coarse aggregate uses basalt.
Wherein fine aggregate and breeze use limestone.
For the short characteristics of City Road Maintenance time window, constantly the traffic construction asphalt has preferably compactingproperties, so that roller-compaction and reach the compactness of regulation at short notice to guarantee the open to traffic on daytime, guarantees the normal operation of Urban traffic.
A kind of constructional method of continuous traffic construction asphalt adopts above-mentioned compound, and the drop temperature of its compound is 135-155 ℃, and first pressing is adopted 11 ~ 15 tons of Steel Roller vibroroller cmpactings 1 ~ 3 time; The multiple pressure adopts 20 ~ 30 tons of pneumatic-tired rollers to roll 3 ~ 6 times; Final pressure is used 9 ~ 13 tons of steel wheeled vibratories 1 ~ 2 time, static pressure 1 time.
Preferred arrangement and method for construction is that first pressing is adopted 13 tons of Steel Roller vibroroller cmpactings 2 times; The multiple pressure adopts 26 tons of pneumatic-tired rollers to roll 4 times; Final pressure is used 11 tons of Steel Roller vibroroller cmpactings 1 time, static pressure 1 time.
Described drop temperature is 145 ℃, and the first pressing temperature is 122 ℃.
Constantly the suitable drop temperature of traffic construction asphalt is 145 ℃, and the voidage of test specimen the results are shown in Table 3 under each drop temperature.
The voidage of test specimen under the different drop temperatures of table 3
The more common hot-mix asphalt mixture of the continuous traffic construction asphalt of the present invention drop temperature reduces by 25 ℃, anti-rut is functional simultaneously, Marshall stability and dynamic stability all increase, and this shearing action for opposing crossing heavy duty bus road pavement is useful.Constantly physics, the mechanical index of traffic construction asphalt see Table 4 with table 5.
Table 4 is the Physical and mechanical properties index (A type grating) of traffic construction asphalt constantly
Table 5 is the Physical and mechanical properties index (Type B grating) of traffic construction asphalt constantly
Constantly the traffic construction asphalt can be used for the maintenance and repairing of urban pavement, and preferably compactingproperties is arranged, and roller-compaction and reach the compactness of regulation at short notice is to satisfy the short requirement of City Road Maintenance time window.Pavement maintenance can be finished in spacious not workspace within the of short duration time smoothly, guarantee the normal operation of Urban traffic.
The urban road intersection bituminous pavement easily produces and serious gathers around bag, push and the disease such as rut, constantly the traffic construction asphalt mixture anti-rutting is functional, Marshall stability and dynamic stability all increase, and this shearing action for opposing crossing heavy duty bus road pavement is useful.
This urban road especially major trunk roads maintenance has preferably promotional value with continuous traffic construction asphalt, the problem of preferably solving urban road construction road occupying, and energy-conserving and environment-protective, excellent performance.
Description of drawings
The continuous traffic construction asphalt of Fig. 1 drop temperature,
The continuous traffic construction asphalt of Fig. 2 construction process on daytime,
The continuous traffic construction asphalt of Fig. 3 construction process in evening.
Embodiment
The present invention will be further described below in conjunction with specific examples, but content of the present invention not only is confined to the following examples.
Application example:
Constantly the traffic construction asphalt is by weight being comprised of following two components: the warm-mixed asphalt binder: gather materials=4 ~ 5: 100; Testing laboratory rolls number of times 14 ~ 36.Warm-mixing agent (DAT): pitch=4:96, warm-mixing agent DAT are the commercially available prod.
Example 1: gather materials (A type grating): the warm-mixed asphalt binder: testing laboratory rolls number of times=100:4:14
Example 2: gather materials (Type B grating): the warm-mixed asphalt binder: testing laboratory rolls number of times=100:5:14
Example 3: gather materials (A type grating): the warm-mixed asphalt binder: testing laboratory rolls number of times=100:4:25
Example 4: gather materials (Type B grating): the warm-mixed asphalt binder: testing laboratory rolls number of times=100:5:25
Example 5: gather materials (A type grating): the warm-mixed asphalt binder: testing laboratory rolls number of times=100:4:36
Example 6: gather materials (Type B grating): the warm-mixed asphalt binder: testing laboratory rolls number of times=100:5:36
Take example 1 ~ 6 as example, constantly traffic construction Asphalt Mixture Experiment constant pressure true property and pavement performance are as shown in table 6.
Table 6 is the compactingproperties of traffic construction asphalt constantly
Annotate: (JTGE20-2011) require testing laboratory to roll generally can to reach the Marshall standard for 24 times to hit 100% ± 1% of real sample density according to " highway engineering pitch and Asphalt Mixture Experiment rules ".
Take example 1 and example 2 as example, constantly traffic construction Asphalt Mixture Experiment chamber pavement performance is as shown in table 7.
Table 7 is the performance of traffic construction asphalt constantly
Annotate: common hot-mix asphalt mixture is close-graded AC-20 asphalt, and bitumen aggregate ratio is 4.4%, and grading limit is with reference to the specification recommends value.
Because the reduction of construction temperature, batching plant and the on-the-spot flue dust that paves obviously alleviate, and smell and thermal radiation are very faint, and working conditions is significantly improved.Even if constantly the traffic construction asphalt is just released from batching plant, also can't see the phenomenon of obviously smoldering, compound outward appearance, workability and common hot-mix asphalt mixture approach.
Constantly preparation of construction and the hot-mix asphalt mixture of traffic construction asphalt are basically identical, and the temperature control that paves reduces more than 20 ℃ than hot-mix asphalt mixture below 130 ℃, adopts Steel Roller to roll.Roll finish after, there is no two samples with hot-mix asphalt mixture in appearance and since compound pave and to roll temperature lower, so constantly the traffic construction asphalt basically rolls and completely just can be open to traffic immediately.
The construction technology of continuous traffic construction asphalt: it is 145 ℃ that compound mixes and stirs temperature, sees Fig. 1,122 ℃ of first pressing temperature, and first pressing is adopted 11 ~ 15 tons of Steel Roller vibroroller cmpactings 1 ~ 3 time; The multiple pressure adopts 20 ~ 30 tons of pneumatic-tired rollers to roll 3 ~ 6 times; Final pressure is used 9 ~ 13 tons of steel wheeled vibratories 1 ~ 2 time, static pressure 1 time.Preferred arrangement and method for construction is that first pressing is adopted 13 tons of Steel Roller vibroroller cmpactings 2 times; The multiple pressure adopts 26 tons of pneumatic-tired rollers to roll 4 times; Final pressure is used 11 tons of Steel Roller vibroroller cmpactings 1 time, static pressure 1 time.(see Fig. 2, Fig. 3) for the situation that adopts other technique, especially do not adopt pneumatic-tired rollers to carry out the situation of multiple pressure, the road surface after then can causing completing has permeable largely, can say that adopting rubber-tyred roller to rub and rolling is the key that improves dense water.
Table 8 is traffic construction asphalt construction technology constantly
Construct and completely rear continuous traffic construction asphaltic road-mix surface course is detected test result such as table 9.
Table 9 is traffic construction Asphalt Mixture Experiment section on-the-spot test result constantly
From table 6 and table 8, can find out, constantly the traffic construction asphalt is when having lower drop temperature, also have preferably compactingproperties, easy compaction moulding, this is that compactness and open to traffic provide the foundation for what reach fast regulation in the construction process.Can find out from table 7 and table 9, constantly the performances such as traffic construction stability at high temperature of asphalt mixture, water stability can satisfy the requirement of major urban arterial highway fully, and the compactness of pavement after the construction can satisfy the requirement of standard.
Therefore, the continuous traffic construction asphalt of the present invention has not only that construction temperature is low, the characteristics of easy compacting, also has good pavement performance, can be used for the especially maintenance of major trunk roads of urban road, can rapid construction and open to traffic, guaranteed the unobstructed of urban highway traffic.
Claims (8)
1. continuous traffic construction asphalt, by gathering materials and the warm-mixed asphalt binder mixes and stirs and forms the warm-mixed asphalt binder: gather materials=4 ~ 5: 100; Described grating of gathering materials is to see Table 1 A type or the Type B in the table 2.
Table 1 is the aggregate grading A type of traffic construction asphalt constantly
Table 2 is the aggregate grading Type B of traffic construction asphalt constantly
2. compound according to claim 1, the warm-mixed asphalt binder is warm-mixing agent by weight ratio: modifying asphalt=4:96 forms.
3. compound according to claim 1 and 2, wherein, coarse aggregate is basalt.
4. compound according to claim 1 and 2, wherein, fine aggregate is limestone.
5. compound according to claim 1 and 2, wherein, breeze is limestone.
6. the constructional method of a continuous traffic construction asphalt adopts the arbitrary described compound of claim 1-5, and the drop temperature of its compound is 135-155 ℃, and first pressing is adopted 11 ~ 15 tons of Steel Roller vibroroller cmpactings 1 ~ 3 time; The multiple pressure adopts 20 ~ 30 tons of pneumatic-tired rollers to roll 3 ~ 6 times; Final pressure is used 9 ~ 13 tons of steel wheeled vibratories 1 ~ 2 time, static pressure 1 time.
7. constructional method according to claim 6, described first pressing is adopted 13 tons of Steel Roller vibroroller cmpactings 2 times; The multiple pressure adopts 26 tons of pneumatic-tired rollers to roll 4 times; Final pressure is used 11 tons of Steel Roller vibroroller cmpactings 1 time, static pressure 1 time.
8. constructional method according to claim 7, wherein, described drop temperature is 145 ℃, the first pressing temperature is 122 ℃.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230195A (en) * | 2014-08-15 | 2014-12-24 | 黑龙江省交通科学研究所 | Graduation of Heilongjiang adjusting type asphalt concrete |
| CN104386949A (en) * | 2014-10-15 | 2015-03-04 | 北京建筑大学 | Reparation method and construction method of warm mix asphalt mixture |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602583A (en) * | 2009-07-10 | 2009-12-16 | 武汉理工大学 | A kind of warm-mixed auxiliary agent for asphalt mixture and preparation method thereof |
| CN102635047A (en) * | 2012-04-17 | 2012-08-15 | 中交二公局第三工程有限公司 | Large-span bridge deck composite structure layer construction technology |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602583A (en) * | 2009-07-10 | 2009-12-16 | 武汉理工大学 | A kind of warm-mixed auxiliary agent for asphalt mixture and preparation method thereof |
| CN102635047A (en) * | 2012-04-17 | 2012-08-15 | 中交二公局第三工程有限公司 | Large-span bridge deck composite structure layer construction technology |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230195A (en) * | 2014-08-15 | 2014-12-24 | 黑龙江省交通科学研究所 | Graduation of Heilongjiang adjusting type asphalt concrete |
| CN104386949A (en) * | 2014-10-15 | 2015-03-04 | 北京建筑大学 | Reparation method and construction method of warm mix asphalt mixture |
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Application publication date: 20130102 |