JPS60152561A - Asphalt molding - Google Patents

Abstract

PURPOSE:To provide the titled molding having excellent water-tightness, waterproofness, flexibility, impact resistance, etc. by blending a specified glass fiber strand with asphalt or mixture of asphalt, a filler and a fine aggregate and molding the resulting mixture. CONSTITUTION:0.5-10vol% glass fiber having a length of 12mm. or above is incorporated in an asphalt mixture obtd. by mixing asphalt having a softening point (ring and ball method) of 40-130 deg.C and a penetration (25 deg.C) of 10-120, a filler (e.g. talc) and 0-90wt% fine aggregate. The mixture is put in a mold having the required shape and molded into a plate or block. EFFECT:Asphalt moldings having excellent resistance to heat, cold and shearing, dimensional stability, strength and damping properties can be obtd. USE:Waterproof material, vibration insulator, paving material, joint filler for the joints of structures, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides waterproofing systems suitable for waterproofing levees, waterways, reservoirs, bridges, buildings, structures, precious objects, etc., prefectural protection materials suitable for vibration isolation of buildings, equipment, etc., and pavements. This invention relates to asphalt moldings suitable for forming paving plates, paving blocks, etc. suitable for surface repair, thin layer surface treatment, etc.

Waterproof lining materials for embankments, waterways, reservoirs, etc. are made of asphalt panels, which are made by mixing asphalt with filler, fine aggregate, etc., and formed into a plate shape, or they are coated with non-woven fabric such as glass fiber on both sides. The one attached is used. This asphalt panel has excellent flexibility and has the advantage of being able to follow the movement of the ground, but on the other hand, if the panel is directly exposed to sunlight during the 9th season, it may soften and sag due to its own weight. It becomes brittle in winter and has the disadvantage of being susceptible to shocks. Therefore, there is a need for an asphalt panel that has excellent dimensional stability, does not sag in the summer, does not become brittle in the winter, and is resistant to impact.

The inventors fd, continuous strand manoto of long glass fli Affj, glass a&lD, composite stratification of asphalt, asphalt mixture, etc. by chopped strand 6) I [As a result of repeated research, -
We were able to develop an asphalt panel that met your requirements.

Furthermore, we investigated other applications and found that the present invention could be used for vibration isolation, paving, etc., as well as #ili-equipped bronoblocks, thereby completing the present invention. In other words, by incorporating an appropriate amount of glass fiber strands into asphalt or an asphalt mixture, molded products can significantly improve durability, strength, impact resistance, durability, etc. This is because it not only improves on the shortcomings, but also has many excellent points.

The present invention is directed to asphalt or asphalt mixed with filler, fine aggregate, etc./111
Add glass fiber strands with a length of 12 mm or more to the compound.
The gist of this article is an asphalt molded product characterized by being formed into a plate shape, block shape, etc., with the asphalt contained therein at a ratio of 5 to 10% by volume.

Asphalt as referred to in the present invention, asphalt such as straight asphalt, semi-prone asphalt, blown asphalt, Gianotsupron asphalt, propane deasphalt, asphalt compound, natural asphalt, etc., and rubber or thermoplastic polymers in these asphalts. Modified asphalt whose physical properties have been modified by mixing 1/1 with process oil, lubricating oil, plasticizer, animal and vegetable oils, natural resins and their derived resins, heat It also includes those to which plastic synthetic resins, liquid rubber, anthracene oil, softeners, tar, etc. are added.

The above asphalts may be used alone or in combination of two or more. The physical properties of asphalt include a softening point (ring and ball method) of 40 to 130°C, preferably (io
~120°C and a penetration (25°C) of 10 to 1201, preferably 10 to 8Q, and is selected depending on the type of molded product and its use.

Fillers include stone powder obtained by crushing limestone and igneous rocks, carbonated lime powder, lime, talc, clay, gravel soil, bentonite,
Gypsum, fly ash, cement, iron oxide, ferrite, carbon, graphite, mica powder, iron sand, ash, silica powder, glass powder, pigment, constitution 1, wood chips, wood powder, sawdust, cork powder, powdered rubber, thread These include rubber, short fiber asbestos, glass fiber, rock wool, natural fiber, semi-synthetic fiber, synthetic fiber, carbon fiber, metal fiber, etc.

For the fine F4 sand, sand such as river sand, sea sand, mountain sand, crushed stone screening, crushed sand, iron sand, sintered ash sand, etc. are used.

Asphalt can be used either without or as a mixture with fillers, fine aggregates, etc., but it is usually used with fillers, fine aggregates, etc. mixed therein. At that time, the ratio of filler, fine aggregate, etc. to be mixed is approximately 0 to 9 (l weight %) to the asphalt mixture. The ratio of filler and fine aggregate depends on the properties of the asphalt panel being made,
Depending on the application, there is a wide range of options to choose from, such as filler only, and fine bone only. When asphalt is used by mixing a large amount of filler, fine aggregate, etc. in a specific axial amount, asphalt with a relatively low softening point can be selected, but in other cases, asphalt with a relatively high softening point can be used. desirable,.

A glass fiber strand with a length of 12 or more means a strand in which a large number of glass fibers f (I) are bundled with a sizing agent.
Chopped strands cut to lengths of 2 to 5Q mrn, rovings made from bundles of continuous strands gathered without twisting, cut to lengths of 12 lengths or more with a chimitzver gun, etc. Alternatively, continuous glass fiber strands or chopped strands with a length of 12 iWm or more are bulkily stacked and entwined to form a mat of an appropriate thickness (for example, a continuous strand cloak) for $p.

The asphalt molded product of the present invention is produced by adding glass fiber strands having a length of 12+am or more (hereinafter simply glass fiber ) of 0.5 to 10% by volume
It is molded into a plate shape with a proportion of . When the length of the glass fiber is less than L'2 mm, the reinforcing effect of the fiber is not sufficient. Moreover, since it is a strand, it has good dispersion and can be used in large quantities. Glass fiber amount is 0
．． When the amount is less than 5% by volume, the reinforcing effect of the fibers is not sufficient.

The greater the amount of glass fiber, the greater the reinforcing effect and the ability to function as a composite material. However, if the amount exceeds 10% by volume, uniform dispersion becomes difficult due to entanglement between the fibers and asphalt. Although the asphalt molded article of the present invention can be produced by various methods, the main method is as follows.

(1) Glass fibers are mixed with heated and molten asphalt or a heated asphalt mixture, and this is formed into a plate shape. Various methods can be used to form the material, including pouring it into a plate and cooling it and cutting it into a fixed size, pouring it into a mold and cooling it, and filling it into a mold and press-forming it.

(2) A glass fiber strand mat is placed in a formwork, and heated and molten asphalt or a heated asphalt mixture is poured into it to fill the gaps between the fibers and form it into a plate shape.

(3) Pour asphalt or an asphalt mixture into a mold, spread a strand mat on top of it, pour asphalt or an asphalt mixture over it, and fill it to form a plate.

(4) Chopped strands or rovings of glass fiber are cut and simultaneously or alternately sprayed with asphalt or an asphalt mixture to form a plate of a predetermined thickness.

(5) Pouring asphalt or an asphalt mixture and scattering glass fibers into a mold are carried out simultaneously or alternately to form a plate of a predetermined thickness.

Press molding can still be applied to the above, and plates and blocks can be made by cutting the molded product to an appropriate size.

The asphalt molded product of the present invention contains a large amount of long glass fiber strands, which are combined with the matrix asphalt or asphalt mixture to form a composite and strengthen the matrix.
Cold resistance, dimensional stability, strength, shear resistance, impact resistance, etc. are significantly improved. Moreover, it has no voids and is watertight, so it has excellent waterproof properties.

The asphalt molded product of the present invention is molded into a plate shape, a protrusion shape, etc., but it can also be molded into a rod shape.

Further, the asphalt molded product of the present invention can be made into various shapes and sizes for ease of handling depending on the intended use.

For example, in the case of a plate-shaped molded product, in addition to a plate with nothing attached on both sides, it is also possible to have pressure-sensitive adhesive on both or one side and attach a release paper to it. In this case, remove the release paper before use. The pressure-sensitive adhesive surface improves adhesion to the substrate. Furthermore, aggregates such as crushed stone, mineral aggregates such as emery, or colored aggregates may be arranged and bonded in one or two rows on the surface of the molded plate. The back side can be left blank, coated with mineral powder, or coated with a pressure-sensitive adhesive and a release paper. The aggregate surface finish not only serves as a protective layer, but also serves as anti-slip pavement, colored pavement, etc. when used on paved surfaces. Moreover, mineral powder particles can also be applied to both sides of the molded plate. In addition, non-woven fabric, cloth, reticulated cloth, paper, metal foil (including those treated with asphalt and those not treated) are bonded to both or one side of the molded plate, and mineral powder particles are added to the surface. It can also be made into something like that.

In terms of size, plate-shaped molded products can vary in thickness from about 3 rims to about 100 inches. If it is thicker than this, it can be laminated. It is usually supplied in quantities of about 5 to 30 pieces. The width is from about 30crn to 2n]
It is supplied up to about 200cm, but this can also be narrow or wide.

Blocks can be molded one by one, but they can also be made by cutting plates. A rod shape is made by cutting a plate, but it can also be made by directly forming it into a rod shape.

The asphalt molded product of the present invention is used after being molded into a plate shape, block shape, rod shape, etc., and has the following characteristics and excellent effects.

(1) Made of composite material reinforced by dispersing a large amount of glass fiber strands of length 12 or more in a matrix of asphalt or asphalt mixture, and has no voids, so it has excellent watertightness and waterproofness. There is.

(2) It has excellent flexibility, is resistant to loads, shearing, bending, impact, etc., and has excellent heat resistance, cold resistance, and dimensional stability.

For example, when the asphalt molded product according to the present invention is used as a waterproof lining for embankments, ponds, etc., it has the flexibility to follow ground subsidence and movement, and also has heat resistance, cold resistance,
It has good dimensional stability and will not sag or break even on slopes.

Moreover, even if it is laid directly on top of the earth and sand that forms the underlying ground, it will not be damaged even if it is piled up on top of it, so waterproofness can be maintained effectively.

If a plate-shaped molded product is used for a paved surface, since it has good dimensional stability, the plate will not stretch due to traffic and will fit into the paved surface and become an integral part, resulting in a thin layer and a good paved surface.

Not only is it good for maintenance and repair, but it also has excellent wear resistance.
It also provides a surface treatment that is resistant to tire chains, spiked tires, etc. Items with aggregate added to the surface can also be treated to prevent slipping. .

Even if a bridge surface (for example, a pedestrian bridge) is paved with a plate-shaped molded product or a block-shaped molded product, it has good dimensional stability, so it conforms well to the deck slab, and it is possible to create a durable pavement with a thin layer.

(3) Excellent anti-vibration effect.

When used for paving steel slabs on pedestrian bridges, it not only functions as a waterproofing and paving material, but also provides vibration and soundproofing properties.

Furthermore, by attaching molded plates to the steel decks of railway viaducts, etc., which also serve as walking paths, pedestrian paths that can be used as both vibration and soundproofing can be created.

Since the asphalt molded product of the present invention has characteristics and effects such as confinement, it can be effectively used in various forms such as waterproofing materials, camera-preventing materials, and paving materials. It can also be effectively used as a filling material for joints in folded structures.

In addition, as a special purpose, it can be applied to cores of dams, etc., and impermeable walls.

It is also possible to create cushioned pavements suitable for surfaces such as tennis courts, playgrounds, etc.

Next, an experimental example showing the effect of mixing glass fiber strands into asphalt to form a composite and Example 2.3 will be explained.

Experimental example 1゜Preparation of specimen Charatz blown asphalt (softening point 115℃, penetration degree (25℃) 40) heated and melted at 180℃ was 3 to 4
Pour into a 4 x 4 x 16 crn steel mold with the thickness of the pipe. Glass fiber chopped strands (37 strands in length) are immediately sprinkled on this surface. Furthermore, Charatz blown asphalt is poured on top of this, and chopped glass fiber strands are also spread. By repeating this process about 10 times, a 4 x 4 x 16 crn specimen is made.

This specimen contains 25 g of glass fiber, the specific gravity of the glass fiber is 2.72, and the volume of the specimen is 4 x 4 x 16 = 2.
The amount of glass fiber in 56CJ is 3.6% by volume.

Similarly, only Charatz blown asphalt was poured into a steel formwork (4 x 4 x 16 cIn) to create a 4 x 4 x 16 α specimen.

For these specimens, the bending strength (20
℃), compressive strength (20℃) and impact test (-10℃)
I did it. The loading speed for bending strength and compressive strength is 1 m.
It is l1lZ minutes. In the impact test, the specimen was cooled in salt water ice at -10° C. for 2 hours, and a steel ball 9 was dropped from a height of α, and the state of fracture was observed with the naked eye. The test results are shown in the table below.

Table Example 1 40% by weight of asphalt heated and melted at a ratio of 10-2050 parts by weight of 1゜prown asphal, 20-3050 parts by weight of plain asphal, 20% by weight of coarse sand, 20% by weight of fine sand, 12% by weight of stone powder Pour a heat-mixed asphalt mixture of 71L5% asbestos and 3M% cork powder into the formwork to a depth of 3 to 471Im, and immediately place glass fiber chopped strands (length 37cm) on top of the asphalt mixture.
mm). Furthermore, an asphalt mixture is poured on top of this, and glass fiber Chida Nobu strands are sprinkled on top. This process was further repeated to create an asphalt panel with a thickness of 15 mm.

This asphalt panel has a specific gravity of 156 and a bending strength (2
C1'C) 311cg / C11, deflection F at that time
jT 12 mm, tensile strength in tensile test (2
0 °C) to 14 g/al.

Extensometer 10 mm, page impact test (0°C) 1n] Good with no damage.

Example 2 An asphalt mixture is prepared by heating and mixing 80 parts by weight of Charatz blown asphalt 30~/10 (softening point 118°C, hardening degree (25°C) 38), 5 parts by weight of asbestos powder, and 15 parts by weight of stone powder. .

A glass fiber strand mat with a thickness of about 13mm is laid in the formwork, and a heat-melted and interlocking asphalt a compound is poured on top of it to create a watertight asphalt panel with a thickness of about 3mm. .

Example 3 On the top surface of the asphalt panel of Example 2, bone phase, which was prepared by heating No. 7 crushed stone and adding 60 to 8015% by weight of straight asphalt to cover the surface, was spread, and the crushed stones were arranged and bonded to the surface by pressing with a roller. I was able to get asphalt panels.

Example 4 Charatsu blown asphalt: 30-40 35 weight 3i)%, blown asphalt 10-20 35 weight 3i)%, asbestos 711. 15% by volume of glass fiber Chiyonobustra/do (length 20m+n) was added and mixed to an asphalt mixture heated and mixed at a ratio of 5% by weight of talc, poured into a plate shape, cooled, and then mixed between rolls. A watertight asphalt panel with a thickness of 15 mm was obtained by pressing.

Examples 1, 2, 3, and 4 are all effective as waterproof materials, reflection crank prevention materials, and pavement maintenance and repair materials. Furthermore, the asphalt panel of Example 3 is suitable for surface treatment.

patent applicant

Claims (1)

[Claims] Asphalt or filler on asphalt, fine/[
! 12 pieces of asphalt mixture with 6L of
An asphalt molded product characterized in that it is formed into a plate shape, block shape, etc., with glass fiber strands of 0.5 to 10% by volume incorporated therein.