JPS60141902A - Improvement in goose asphalt pavement - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in dozen asphalt pavements. Booth asphalt is a bituminous mixture that is poured using the fluidity of the mixture at high temperatures and spread evenly with a finisher or trowel.

Its physical properties are impermeable and highly waterproof (and has excellent shore abrasion resistance, so it has traditionally been used for bridge pavement, especially for bridges with steel deck slabs.
It is widely used in places where compaction is difficult.Also, since this booth asphalt is a bituminous mixture with no nitrogen pores, its properties are greatly influenced by the bituminous material used, and it cannot be used normally. Compared to asphalt mixtures, it has lower flow resistance (and has the disadvantage that its paved surface is more likely to rut during high temperatures in the summer).

Therefore, the new asphalt pavement will be made of natural asphalt (T, L, A), flattened asphalt with a viscosity of 60 U, and thermoplastic resin (T) with a softening point of 60 U or more, which is compatible with asphalt. Generally, an improving material such as 100) is added.

However, the flow resistance and cracking resistance of booth asphalt are in a trade-off relationship, and booth asphalt that primarily focuses on flow resistance cracks due to vibration shock, temperature stress, etc. Countermeasures against cracks in pavement surfaces are becoming a major problem.

Therefore, when formulating Booth asphalt, we are currently designing the formulation to suppress the degree of flow resistance modification by modifiers to prevent cracking. Its properties are subtly affected by the time it takes to make a shoe, and it may become prone to cracking due to overheating, excessive shoeing, etc.

The present invention aims to simultaneously improve the impact resistance, cracking resistance, and flow resistance of booth asphalt, which have these drawbacks. The system was constructed as follows regarding the improvement of one-booth asphalt pavement.

That is, the present invention relates to the improvement of booth asphalt decoration, which is characterized in that in booth asphalt pavement, fiber materials are mixed in the booth asphalt in the desired form of fibers, threads, ropes, or woven fabrics. According to the present invention having the above structure, by mixing steel fibers of 0.5 to 3.0 valley thickness into the conventional booth asphalt, it is possible to form a woven or woven cloth made of glass fibers with a single layer or multiple layers. This has the effect of significantly improving flow resistance, cracking resistance, impact resistance, etc.

Examples of the present invention will be described in detail below.

Example (1) Aggregate blend No. 6 aggregate 19.8% 178.2 to No. 7 aggregate 32.6% 293.4KP Screenings 9.8% 88.2Kp Medium Sand (N3) 11.
3% 101.7) F# filler 26.5chi 33
8.9~ Total 100.0 Chi 900. OKg (2) Binder blend asphalt 60/80 90chi 95 to 2M possible eJ4
J]k('f'R1oO) 5% 5 to 9 Total 10
0% 9 to 100 (3) Steel fiber combination + 3) -1 Steel fiber 1.5 each &% 9 to 50 (31-b S5--A-yl fiber 1.0% by volume
33 to 9 (31-3 steel fiber 2.0 volume skin 67 to 9 However, joint density - 8 = 2.4 t /
m', steel fiber ratio B, -=8, the following formula, J
: 9W output.

1.000t÷2.4t/iXO, o15X8=0.0
5t (4) Mixing Put the above steel fibers from 16.7~ into a plastic bag, and put the 3 pieces in the bag directly into a mixer by hand, and the mixing time was 20 seconds for dry and 45 seconds for wet. 1 piece.

Under the above conditions, the dispersion of steel fibers is good without the generation of fiber balls, and the Reuel viscosity is 220.
C, it took 15 seconds, and there was no problem with workability.

The steel tiles made in this way can be efficiently spread on the construction surface by applying some vibration.

After construction, the specimen was cut out after a certain curing period and subjected to a simple bending test and a wheel tracking test.

A 5X10X30crn specimen was used for the simple bending test. The humidity is OC and 15U twice, and the loading speed is 5.
The results are shown in Figures 1 and 2 when the test was carried out at 0w/min, and the results were compared by comparing the amount of steel fiber mixed into the booth asphalt at 1.0%, 1.5%, and 2.0%. did.

From this test result, the fiber booth showed remarkable ductility even in the OC brittle region, withstood a heavy load even after breaking, and the amount of strain at 200 Ky load and 100 Ky load after rupture is shown in Table 1. As shown, it was found that the increase was several times that of conventional booth asphalt.

Table 1 A wheel tracking test was conducted to confirm the elongation of strain after rupture of the conventional booth and the fiber booth and the flow resistance of the fiber booth.

Table 2 shows test values for specimens in which the volume of steel fiber mixed in the booth asphalt was changed to 1.0%, 1.5%, and 2.0%.

Table 2 Foil Tracking Test As shown in Table 2 above, 7 Eyeberg Goose has lower flow resistance than the conventional Booth, and is a dog with excellent flow resistance.

As for the impact resistance, we dropped a 4.5 kg steel ball from a height of 45 crn on the test specimen and investigated the number of drops until it broke.
On the other hand, the fiber booth (containing 1.5% steel fiber) was easily destroyed in 473 times, showing 6 times the impact resistance of regular booth asphalt.

Regarding the workability of the above-mentioned steel fiber booth, since fiber booths are constructed by pouring, they must have fluidity during construction. Although fluidity decreases by mixing fibers, fluidity during construction can be ensured by increasing the amount of binder in proportion to the amount of fibers. Further, it is also possible to apply vibration to a part by a desired method during leveling.

The above-mentioned fibers are not limited to steel; glass fibers, synthetic resin fibers, natural fibers such as hemp, and mineral fibers can be used alone or in combination. Furthermore, instead of being in the form of fibers, thread or cloth-like materials can be mixed. As shown in Figure 3, as shown in Figure 3, a normal booth asphalt bottom layer 1 with a thickness of 2 crn is laid on the construction area, a glass fiber knitted fabric 2 is laid on top of it, and goose asphalt is placed on top of it. ) & layer 3 to a thickness of 2 CTH to integrate the glass fiber knitted fabric 2 into a sandwich-like structure.

The glass fiber knitted fabric 2 has the following characteristics: Warp: 4,630'l'EX Z Cotton Thread: 9,260'l'EXl Main direction Renaud continuous weave density Warp: 0.5 threads per inch Weft: 1.0 threads per inch The surface of the glass fiber is chemically treated to improve adhesion to asphalt, giving it strong tensile strength.

The glass fiber cloth 2 can be multi-layered instead of being thin, and the fiber booth shown in the first embodiment can also be used in combination. According to this embodiment, the textile fabric 2 is flexible and has a high tensile strength, and has sub-fluidity of booth asphalt.

Excellent impact resistance and crack resistance.

[Brief explanation of the drawing]

FIG. 1 is a table showing the results of the OC bending strength test of the F-bar booth asphalt pavement according to the present invention.
Figure 2 is a table showing the results of the bending strength test at 15C. FIG. 3 is a sectional view showing a normal state in which a glass fiber knitted fabric is inserted into booth asphalt in the form of a sand inch, and FIG. 4 is a plan view of the glass fiber cloth. 1...Booth asphalt bottom layer 2...Glass fiber cloth 3...Darth asphalt surface layer 4F 1 Figure 3 Description Japanese Patent Application No. 58-251915 2, Title of the Invention Improvement of Booth Asphalt Pavement 3, Relation to the Amendment 1 Case Applicant Address Name Taisei Road Co., Ltd. 4 Agent Address Toshin, Chiyo LIJ-ku, Tokyo 101 11J2-chome 1
No. 11 Name (6441) Patent Attorney Michizo Isono Phone: (03) 863-5855 (Representative) 5. Date of amendment order: March 27, 1980 (shipment date) 1. Contents of amendment (1) Specification Page 10, line 9, the text "F- is not shown in the table..." is corrected to "1 is shown in the figure...". (2) In the same IO line [-Results not shown in table...]
I am correcting this by saying, ``I don't show the results, but I use figures...''.

Claims (1)

[Scope of Claims] (Improvement of 11 dozen asphalt pavement characterized in that the fibrous material is mixed in the booth asphalt in the desired form of fibers, yarns, ropes, and woven fabrics) (2) A patent characterized in that the fiber material to be mixed in the booth asphalt is steel fiber mixed in the form of fibers in an amount of 0.5 to 3.0 volume per 100% volume of the booth asphalt. Claim 1
Improving the dozen asphalt pavement described in Section ◇ (31 nil) The fiber material to be mixed in the goose asphalt is glass fiber in the form of a woven fabric between the bottom and surface of the dozen asphalt pavement/German style -l or multiple sandwiching. The improvement of the dozen asphalt pavement according to claim 1, characterized in that the asphalt pavement is made into one piece.