JPH0467522B2 - - Google Patents

Description

[Detailed description of the invention]

(Field of Industrial Application) The present invention is suitable for paving or repairing roads in cold regions that require wear resistance, airport runways, spillways and pressure tunnels of dam embankments, and marine concrete structures. This invention relates to improvements in wear-resistant materials used in In addition, hereinafter, the materials used for the above-mentioned paving and repair are collectively referred to as paving materials. (Prior Art) The surfaces of automobile roads and airport runways are paved with concrete or asphalt.
Additionally, the above-mentioned water conservancy structures and marine structures are made of concrete. (Problem to be Solved by the Invention) However, in cold regions, the spiked tires or chains of cars during the snow melting season can cause ruts on the road surface, and the dust thrown up can cause great harm to surrounding residents. This has become a major social problem. It has also been pointed out that on roads inside tunnels in cold regions, the ruts described above cause the dust thrown up into the air to obstruct visibility and impair safety. On the other hand, the pavement surface of an airport runway is subject to severe wear due to its characteristics, and the pavement surface is frequently repaired from the viewpoint of safety. Furthermore, the surfaces of water conservancy structures such as dams, marine concrete structures, etc. are easily eroded or destroyed by the action of mudflows, etc., and these also require periodic repair. Although concrete or asphalt has excellent compressive strength, it has poor bending strength, tensile strength, and abrasion resistance, which causes the above-mentioned problems. The present invention was developed in view of the above-mentioned circumstances, and aims to eliminate the above-mentioned problems by providing a new wear-resistant pavement material that has excellent shock absorption properties and has toughness such as wear resistance. It is something to do. (Means for Solving the Problems) In order to achieve the above object, the wear-resistant paving material of the present invention is a mortar composition consisting of cement, fine aggregate, and water, mixed with a solution of synthetic resin or synthetic rubber, or by kneading the emulsion, one or more types of fibers selected from glass fibers, synthetic resin fibers, carbon fibers, etc., and one or two types of hard aggregates selected from iron particles and iron pieces. The main purpose of this is to achieve the following goals. As the above-mentioned cement, Portland cement, early strength cement, medium heat cement, colored cement such as white, alumina cement, etc. are used.
Further, as the fine aggregate, No. 4 to No. 7 silica sand, fine sand, finely crushed blast furnace slag, etc. are used. The paving material of the present invention can be obtained by adding an appropriate amount of water to cement and fine aggregate to form a mortar composition, and adding and kneading the above-mentioned materials to the mortar composition. These additive materials will be explained below. () Regarding fibers: Glass fibers include alkali-resistant glass fibers made by mixing and melting 10 to 23% zirconium oxide in a glass composition, and synthetic resin fibers include vinyl chloride resin, polyethylene resin, or nylon resin fibers. is preferably adopted. Furthermore, carbon fiber
Kepler, asbestos, rock wool, etc. can also be used. The above-mentioned alkali-resistant glass fibers have a fiber diameter of around 0.5 mm, are bundled in 50 to 400 fibers, and have an optimal aspect ratio of about 60. Although any of these fibers can be used alone, it is desirable to use glass fiber alone or in combination with the other fibers mentioned above. () Regarding synthetic resin or synthetic rubber solutions or their emulsions (hereinafter referred to as synthetic resin liquids, etc.); Solutions of polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose, acrylic, etc.
or ethylene vinyl acetate, styrene butadiene,
Emulsions such as chloroprene are preferably employed. () Regarding hard aggregate; Iron grains are made by crushing and sifting furnace crushed waste discharged from the iron manufacturing process in which scrap iron or iron ore, etc. is reduced or oxidized in a blast furnace or electric furnace, and then magnetically sorted. Furnace crushed iron with a diameter of 15 mm and an iron content of 40% or more is most preferably used. In particular, this iron granule is a irregularly shaped granule with an uneven surface, and has slag and mineral debris stuck to the surface, and has good adhesion with the above cement and synthetic resin liquid, and is suitable for use in the matrix of pavement structures. It is held very stably within the structure due to its anchoring effect. In addition, powder, various types of waste iron particles, etc. can also be used. Further, as the iron piece, an iron piece cut from waste iron such as leftover material is used. These hard aggregates can be used alone or in combination. When adjusting the composition of each of the above materials, cement and fine aggregate are mixed, water and synthetic resin liquid etc. are added and kneaded, and the above fibers are added and mixed uniformly. Finally, hard aggregate is added and kneaded.
The mixing ratio is 30 to 150 parts by weight of fine aggregate to 100 parts by weight of cement, 3 to 20 parts by weight of synthetic resin liquid etc. (solid content ratio) to 100 parts of cement, and 0.5 to 100 parts of fiber. 5% by weight, and approximately the same amount to twice (by weight) of the hard aggregate as the above cement. (Function) When paving a road surface or the like using the abrasion-resistant paving material having the above structure, the surface to be paved is properly cured by sanding, and then paved while applying vibration. At this time, although the hard aggregate has a much higher specific gravity than the cement slurry, it is supported by the intertwined fibers, and the paving is done in a uniformly dispersed state without settling due to vibration. In cured and cured pavement structures, the tensile strength is 3 to 5 times that of ordinary concrete or mortar due to the bonding effect between the cured synthetic resin and fibers.
Impact resistance and scratch resistance are dramatically improved. also,
Since the hard aggregate is supported in a uniformly dispersed state in the cement matrix, there is extremely little wear even when cars equipped with spiked tires or chains drive on the paved surface, thus reducing the environmental impact around the road. This greatly contributes to improvements and also ensures safety within the tunnel. Furthermore, due to the action of the kneaded synthetic resin, etc., the water absorption rate is about one-tenth that of normal concrete, so there is no concern that it will crack due to freezing. Furthermore, if an airport runway is paved with the above-mentioned paving material, it will absorb the impact force applied during takeoff and landing of airplanes, and will not be worn out by strong frictional forces, extending its lifespan. Furthermore, if the above-mentioned paving material is applied to the surface of a dam, water conservancy structure, marine concrete structure, agricultural waterway, etc., abrasion and destruction caused by mudflow can be effectively prevented. (Example) Next, an example will be described. () Table 1 shows the blending ratios of the examples and comparative examples of the wear-resistant pavement material of the present invention.

[Table] () Test pieces were prepared from each of the above samples and tested for bending strength and abrasion resistance. The results are shown in Table 2.

【table】

[Table] The bending strength is measured in accordance with JISR5201.
The wear resistance test was conducted by measuring the wear depth per hour using a ball wear tester. From the results in Table 2, it is understood that the pavement material of the present invention has excellent wear resistance. Incidentally, when the same test was conducted on cement concrete and asphalt concrete used for paving general roads, the former had an average of 3.3 mm/hr and the latter had an average of 4.3 mm/hr. It is understood that the wear resistance is excellent. In particular, those using granulated iron (*3) have extremely tough surfaces, and if used for paving automobile roads, it is expected that wear caused by spiked tires, chains, etc. will be extremely reduced. In addition, the bending strength is generally not much different from the comparative example, but it is 3 to 5 times stronger than ordinary concrete or mortar, and this is due to the synergistic effect of the fibers and the kneaded synthetic resin liquid. It is assumed that this was granted. Furthermore, although the kneaded material was strongly stirred in the process of preparing the sample, it was confirmed that the hard aggregate did not settle and was uniformly dispersed. This is because the hard aggregate is supported by fibers intertwined with each other in the kneaded material and its settling is prevented. (Effects of the Invention) As described above, the wear-resistant paving material of the present invention has fibers such as glass fibers, synthetic resin liquid, and hard aggregate such as iron powder or iron pieces mixed in the mortar composition. The synergistic effect of the combination of fibers, synthetic resins, etc. strengthens the bending and tensile strength of the pavement structure, and the hard aggregate dramatically increases the wear resistance of the surface. If this is used for paving automobile roads or airport runways, wear caused by spiked tires and chains will be significantly reduced, environmental deterioration in the surrounding areas due to dust generation will be prevented, and safety in tunnels will also be ensured. , it also brings great benefits to runway maintenance. In addition, various water conservancy structures,
If this method is adopted for repairing marine concrete structures, wear and tear caused by mudflows will be significantly reduced. Furthermore, if white cement is used as the cement and is used as a substitute for the white marking line when paving the road, the white line itself is less likely to wear out and a semi-permanent marking function is guaranteed. In addition, since the paving material of the present invention contains synthetic resin etc.
The water absorption rate of the pavement surface is low, so there is no concern that cracks will occur due to freezing of water. The present invention, which has many noteworthy effects as described above, is extremely useful to society.

Claims (1)

[Claims] 1 A mortar composition consisting of cement, fine aggregate, and water, a solution of synthetic resin or synthetic comb, or an emulsion thereof, and one or more types of fibers selected from glass fibers, synthetic resin fibers, carbon fibers, etc. and one or two types of hard aggregate selected from iron particles and iron pieces.