JP3459509B2 - Asphalt pavement structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aggregate, rubber particles as a constituent material, a filler, and a high-viscosity modified asphalt having a large porosity. The present invention relates to a technique for forming a pavement structure in which the rubber particles are dispersed over the entire cross section of the pavement and protrude from the surface . As in the present invention, rubber particles are mixed into a pavement having a large porosity as a constituent material to form a pavement structure that is dispersed over the entire cross-section of the pavement and protrudes from the surface to provide a stable road surface, and that the traffic noise is reduced. There is no technology that has been able to simultaneously achieve the reduction, high drainage, and freezing suppression effects on the same pavement, and it is a completely new technology. [0002] The present invention is capable of dispersing and absorbing the impact caused by the load of a running vehicle, and therefore has excellent durability such as flow resistance and abrasion resistance. An object is to provide a stable road surface for heavy traffic with little occurrence of phenomena. Further, traffic noise due to traffic vehicles is reduced. An object is to provide a so-called sound-reducing pavement. Further, the present invention has a high drainage property, and aims to quickly drain rainwater from a pavement body and to contribute to safe running of a vehicle such as a hydroplaning phenomenon and splash prevention. It is still another object of the present invention to provide a road surface having an effect of suppressing freezing, in which a frozen layer attached to the road surface is crushed and separated by a load of a traveling vehicle in a cold region in winter. That is, in the present invention, to provide such a stable road surface for heavy traffic, traffic noise reduction, high drainage, freezing suppression effect is expressed simultaneously on the same pavement, and in cold regions in winter as well as in warm regions The challenge is to demonstrate the effect. [0003] The asphalt pavement structure described in claim 1 has a porosity between aggregates of 10 to 40%.
Rubber particles are mixed as a constituent material into a pavement having a high porosity, and the pavement has a pavement structure that is dispersed over the entire cross section of the pavement and protrudes from the road surface. With this pavement structure, a stable road surface can be provided for heavy traffic, and at the same time, traffic noise reduction, high drainage, and freezing suppression effects can be simultaneously exhibited on the same pavement . [0004] The particle size are mixed in A Sufuaruto paving material 1
If rubber particles of 0 to 1 mm and weight ratio of 1 to 10% are dispersed in the entire cross section of the pavement and protrude from the road surface, the pavement is highly elastic and can absorb and absorb the impact caused by the load of the traveling vehicle. It has the effect of doing. Further, the porosity between the aggregates is 10 to 40.
%, It has the effect of dispersing and absorbing shocks due to load, and has the effect of having a large sound absorbing property, and these have a synergistic effect to provide durability such as fluid resistance and abrasion resistance. In addition to providing a stable road surface even for heavy traffic by reducing road rutting and road surface wear phenomena, it is possible to provide a road noise within a frequency range of 250 to 3,000 Hz, which is a frequency range of traffic noise caused by traffic load.
A so-called sound-reducing pavement having a sound absorption of 0% or more. Further, since such a pavement has a water permeability of 1 × 10 ^-1 cm / sec or more, rainwater is quickly drained from the pavement to prevent a hydroplaning phenomenon and splashing. It has a so-called drainage function that contributes to the safe traffic of vehicles. Further, such a pavement has the effect of crushing and separating a frozen layer on the road surface caused by rainfall, snowfall, etc. in a cold region in winter at low temperatures, and is excellent in durability and sound reduction as well as freezing. It also has an inhibitory effect.
As described above, the present invention can provide a stable road surface for heavy traffic, and at the same time, can reduce traffic noise, have high drainage properties, and have an effect of suppressing freezing on the same pavement. Therefore, it is effective not only in warm regions but also in cold regions in winter. It is effective not only on general roads but also on heavy traffic roads. DETAILED DESCRIPTION OF THE INVENTION (1) A blended design aggregate and a filler are described in “Asphalt Pavement Outlines” (sixth edition published on April 6, 1990) published by the Japan Road Association. Use the quality you have . [0008] rubber particles are those of quality for the paving, i.e., dispersed throughout pavement, and low noise to protrude on the surface, for measuring the anti-freezing effect, traffic vehicle load and tire wear and has a moderate durability and weather resistance, cold resistance to weather changes, also manufactured, for protruding the road surface as well as distributed across the cross-section of the paving process above as pavement, particle size 10~1mm , With a weight ratio of 1-10%
Use what you have done. Rubber particles are 1 to 10% by weight
Use within the range. The synthetic particle size of the paving material is used within the range shown in the table shown in FIG . Shop Paneling void ratio is adjusted to be within a range of 10-40%. [0010] Asphalt usually uses a high-viscosity modified asphalt. In particular, the effect is further increased by using a high-viscosity modified asphalt manufactured by Obayashi Road Co., Ltd. The high-viscosity modified asphalt is manufactured by installing a rubber / resin-based thermoplastic elastomer on straight asphalt, bonding them in a three-dimensional stitch shape, and performing a multi-step process in a dedicated plant so as to be uniform. When using other commercially available high-viscosity modified asphalt, it is necessary to test and determine whether the quality is suitable for this pavement. Design asphalt amount is 3 ~
The content is adjusted within the range of 8%, but is adjusted so that the porosity is within the range of 10 to 40% and the stability of the pavement can be ensured. Since the the present invention incorporating rubber particles into the pavement body having a large porosity, wheel tracking test, permeability test, to confirm the stability performs labeling test like adjusting. (2) Production This paving material is produced in a usual asphalt plant. First, the aggregate heated to a temperature of 185 ° C. or lower is charged into the mixer. Next, rubber particles at room temperature are charged, and a filler is further charged, and an appropriate time is selected within a range of 15 to 30 seconds to perform dry mixing . [0012] The following Ide, the modified asphalt of high viscosity 18
The mixture is heated to 5 ° C. or less and put into a mixer, and wet-mixed for 30 to 40 seconds . ( 3) Pavement The pavement material produced in this manner is laid on a pavement surface with a small amount of human power, and with a large amount of asphalt finisher. The material temperature at this time is 140 to 170 ° C. At this time, in the case of machine construction, while laying down, fully compact with a tamper and vibrator of an asphalt finisher . [0014] The laid-out break-in was paving material, the material temperature is 160
When the temperature has dropped to about ℃ or less, the compact is compacted using a load roller . Examples of the compaction machine, can be used, for example loading roller. Various kinds of road rollers can be used.In this pavement material, rubber particles are dispersed throughout the pavement and adjusted so as to protrude to the surface. In addition to this, it is necessary to secure a porosity of 10 to 40%, and it is appropriate to use an iron wheel roller about 2 to 4 times so that compaction is not excessive. When the pavement material has dropped to approximately 50 ° C. or less, it is used for transportation. The pavement constructed in this way has excellent durability such as fluidity resistance and wear resistance, and reduces the rutting of the road surface and the phenomenon of road surface wear, and provides a stable road surface even for heavy traffic. Furthermore, it has a sound-reducing property that absorbs traffic noise caused by traffic vehicles, has a drainage function during rainfall, and has an effect of suppressing freezing in cold winter regions. The pavement structure according to the present invention has a particle size of 10 to 1
mm rubber particles are mixed in a weight ratio of 1 to 10%,
Since the rubber particles are dispersed throughout the cross section of the pavement and protrude also on the road surface, the pavement is highly elastic and has the function of dispersing and absorbing the impact due to the load of the traveling vehicle, and the rubber particles are It reduces traffic noise and has the effect of suppressing freezing, in which the frozen layer adhering to the road surface is crushed and separated by the load of the traveling vehicle during cold winter. Further, the porosity between the aggregates is adjusted to be 10 to 40%, and has an effect of dispersing and absorbing the impact due to the load and an effect of having a large sound absorbing property. A synergistic effect results in a pavement rich in elasticity and sound absorption. If this structure is used for pavement, the impact due to the load of the traveling vehicle is dispersed and absorbed, and the durability such as flow resistance and abrasion resistance is excellent, and the rutting of the road surface and the phenomenon of road surface wear are reduced. The road surface is stable even for heavy traffic, and since it is rich in sound absorption, traffic noise caused by traffic vehicles is reduced, resulting in a so-called sound-reducing pavement. Furthermore, it has the function of draining rainwater promptly from the pavement, and also has the effect of suppressing freezing in winter. That is, the effects of the present invention are as follows. The dynamic stability by the wheel tracking test, which is an indicator of the flow resistance, is 5% for ordinary asphalt mixtures.
While it is about 00 times / mm, the pavement according to the present invention shows 1,500 times / mm or more. The labeling test value, which is an index of wear resistance, is about 10 to 15 mm for a normal asphalt mixture, whereas it is 5 mm or less for the pavement according to the present invention. The pavement structure according to the present invention has a sound absorption coefficient of about 10% or more in a range of 250 to 3,000 Hz which is a high frequency range of traffic noise. In the pavement structure according to the present invention, 1 × 10 ^-2 cm
/ Sec or more. Furthermore, because of such a pavement structure, at a low temperature in a winter cold region, at a low temperature, there is an effect of suppressing freezing, which crushes and separates a frozen layer on a road surface surface caused by rainfall, snowfall, or the like by a traffic load. Difficult to do, but will be evidenced by reduced traffic accidents, faster road exposure after snowfall than other types of adjacent pavements, and reduced snow-cold work

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a table showing a composite particle size of a pavement material according to an embodiment of the present invention.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 5-321206 (JP, A) JP 5-32446 (JP, A) JP 5-214708 (JP, A) JP 6 279684 (JP, A) JP-A-3-177344 (JP, A) JP-A-7-54304 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C04B 26/00 C08L 95 / 00 E01C 7/26

Claims (1)

(57) [Claims 1] An aggregate and a particle size of 10 to 1 as a constituent material
mm, rubber particles having a weight ratio of 1 to 10%, a filler, and a high-viscosity modified asphalt, and a porosity of 10%.
An asphalt pavement structure in which the rubber particles are dispersed over the entire cross section of the pavement and protrude from the surface.