JP2007132006A - Non-slip structure of pavement surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-slip structural body capable of also improving legibility and a material cost or a maintenance repair cost and a non-slip effect and its durability in a pavement surface. <P>SOLUTION: In the non-slip structural body of the pavement surface making a granular material attached to the surface of an aggregate located on the surface layer of the pavement among aggregates constituting a pavement by a resin binder, the non-slip structural body of the pavement surface is characterized in that the granular material includes a crushed stone particle obtained by crushing a black color system igneous rock and/or a black color system sedimentary rock, the constitutive ratio of the crushed stone grain in the granular material is within a range of 40 to 100 mass%, the rate of passage to a screen with 0.125 mm of an aperture of the granular material is not more than 10 mass% and that the rate of passage to a screen with 3.35 mm of an aperture of the granular material is not less than 90 mass%. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to the field of paving materials used for paving surfaces such as roads, parking lots, plazas, bus terminals, and the like, and more specifically to an anti-slip structure in which an anti-slip material is attached to the surface of the paving material. It is.

  Conventionally, in order to prevent slipping of vehicles, pedestrians and the like on the pavement surface, there has been a method of increasing the slip resistance value by spraying and bonding hard aggregate on the pavement surface as seen in Non-Patent Document 1.

  On page 29 of this document, as hard aggregates, naturally produced silica sand, emery, silica, etc., and artificially produced calcined bauxite, special hard slag, fused alumina, various kinds of Abrasives are listed.

However, these hard aggregates have a drawback that they are expensive because they are prepared for special applications. In addition, since there are generally many white materials and the pavement surface approaches white, there is a problem of increasing glare for viewers such as passers and drivers due to reflection from sunlight and oncoming vehicle lights at night. . Moreover, even if the road marking object is painted with white paint, there is a drawback that it is difficult to distinguish it from the road surface. In addition, there are many cases where the adhesive strength between aggregates is insufficient or the adhesive strength gradually decreases, and the aggregate is released from the pavement surface. There were problems such as incurring cost increases.
"Paving Construction Handbook", Japan Road Association, published on December 13, 2013, pages 162-163

  The present invention solves the above-mentioned conventional problems, has a slip prevention effect and durability on the pavement surface, improves visibility, and further reduces the total cost including not only the material cost but also the freight cost. An object of the present invention is to provide a non-slip structure that is reduced in quality and stable in quality.

    That is, the present invention is an anti-skid structure for a paved surface in which granular materials are attached to the surface of the aggregate located in the surface layer portion of the paving among the aggregates constituting the paving via a resin binder, The granular material includes crushed stone particles obtained by pulverizing black igneous rock and / or black sedimentary rock, and the composition ratio of the crushed stone particles in the granular material is within a range of 40 to 100% by mass. The slippage of a paving surface is characterized in that the passage rate of a 0.125 mm sieve is 10% by mass or less and the pass rate of the granular material to a 3.35 mm sieve is 90% by mass or more. It is a structure.

   ADVANTAGE OF THE INVENTION According to this invention, the durable slip prevention effect can be provided to a pavement surface comparatively easily and uniformly at low cost. On the other hand, unlike conventional anti-slip materials, it is finished in black, so the brightness of the pavement surface can be suppressed, the glare of the viewer due to reflection from the pavement surface can be avoided, and contrast with the road marking with white paint It becomes clear. Black granulates are often used as tile or other ceramic raw materials, and therefore, the production areas of light-colored granulates, which are often used in the same way, are often relatively close to produce mixed granulates. There is no need for extra material fare. In addition, the black granular material can be diverted as a single product for various uses, and therefore the product quality such as particle size, purity and color variation is stable.

  The anti-slip structure for a paved surface according to the present invention is obtained by attaching particulate matter to a surface of an aggregate located in a surface layer portion of a base pavement (base pavement) via a resin binder.

  As the base pavement that becomes the base of the paved surface, resin mortar pavement in which resin mortar mixed with aggregate and resin binder is paved in layers may be used, or resin mortar mixed with aggregate and resin binder is opened asphalt concrete Resin mortar rubbing pavement coated in the voids in the surface layer of the pavement may be used.

  As the aggregate, an elastic aggregate such as a rubber chip may be employed in addition to ceramic.

  Examples of the resin binder include urethane resin, epoxy resin, methyl methacrylate resin (MMA resin) and the like.

  The resin binder is originally used to bond and fix the aggregates together, but there is a concern that the slip resistance value is lowered if the surface layer of the aggregates is still resin-coated.

  Therefore, it is important to attach granular materials as in the present invention. By firmly attaching the granular material, an excellent anti-slip effect can be achieved.

  It is important that the granular materials include crushed stone particles (hereinafter, also referred to as “black crushed stone particles”) obtained by pulverizing black igneous rocks and / or black sedimentary rocks. These granular materials have an excellent anti-slip effect, and by including at least one kind, the pavement surface can be made dark, and passers and drivers by reflection from sunlight and nighttime oncoming light. This is because the glare for the viewer is reduced, and when the road marking object is painted with white paint, it is easy to distinguish it from the road surface.

  Igneous rocks and sedimentary rocks often contain colored minerals, and may be obtained as black rocks required in the present invention. In addition, it is suitable as a rock to be applied to the present invention because it is easily pulverized to a desired particle size and has no gloss or is hard.

  Black igneous rocks include volcanic rocks, plutonic rocks, basalts, andesite. Black sedimentary rocks are classified into conglomerates, sandstones, etc. depending on the particle size of the constituent particles. In the present invention, sandstones are preferably crushed.

  As the black crushed stone particles, it is preferable that the luminance ratio with respect to the artificial emery abrasive # 30 as a standard is 60 to 180%. By setting it to 180% or less, a good black color can be exhibited. The luminance ratio is preferably as low as possible from the point of contrast with the white paint, but may be as low as about 60%.

  As a constituent ratio of the black crushed stone particles in the granular material, it is important to be 40 to 100% by mass. By setting it to 40% by mass or more, there is an excellent effect that the brightness of the pavement surface can be suppressed when attached to the surface of the pavement, the glare caused by reflection can be reduced, and the road marking with white paint can be emphasized. be able to.

  Moreover, it is also preferable that the granular material contains a light-colored granular material together with black crushed stone particles. Due to the contrast between the black crushed stone particles and the light-colored granular materials, the granular materials in the anti-slip structure of the present invention become conspicuous. Less uniform spraying is possible.

  The brightness ratio of the light-colored granular material is 300 to 1000% when the mixed black crushed stone is used as a reference, and 400 to 1200% when the artificial emery abrasive # 30 is used as a reference. Is preferred. Depending on the contrast between the black crushed stone particles and the light-colored granular materials, the black crushed stone particles are 300% or more based on the standard, or the artificial emery abrasive # 30 is 400% or more based on the contrast. An effect can be obtained. On the other hand, the effect of suppressing excessive glare and maintaining road marking with white paint is maintained by setting it to 1000% or less based on black crushed stone particles or 1200% or less based on artificial emery abrasive # 30. can do.

  As the light-colored granular material, for example, it is preferable to employ at least one of tile scrap, silica sand, and glass particles because the above luminance ratio range can be achieved and it can be obtained as an inexpensive raw material.

  The composition ratio of the light-colored granular material in the granular material is preferably 5 to 60% by mass. By setting it as 5 mass% or more, the effect by the contrast of the above-mentioned black crushed stone particle | grains and a light-colored granular material can be acquired. Moreover, 60 mass% of an upper limit is based on the same reason as the lower limit (40 mass%) of the composition ratio of black crushed stone particles.

  As the size of the granular material, it is important that the passing rate with respect to a sieve having an opening of 0.125 mm is 10% by mass or less and the passing rate with respect to a sieve having an aperture of 3.35 mm is 90% by mass or more. When the passing rate with respect to a sieve having a mesh size of 0.125 mm exceeds 10% by mass, the above-mentioned granular material is too small, and sufficient slip resistance cannot be obtained, and it is easy to be scattered when sprayed on a paving surface. Arise. On the other hand, if the passing rate with respect to a sieve having a mesh opening of 3.35 mm is less than 90% by mass, the above-mentioned granular material will be too large, the adhesion strength will not increase, and particle loss will easily occur due to vehicle traffic etc. Problems also arise.

  The size of the granular material within the above-mentioned regulations can be adjusted by appropriately pulverizing.

  Further, it is preferable that the granular material is sprayed and attached before the resin binder in the resin mortar is completely cured.

  Further, in order to increase the adhesion strength, a treatment for adhering a small amount of resin to the surface of the granular material may be performed in advance.

The amount of the granular material applied is preferably 25 to 1000 g per 1 m ^{2 of} the paved surface. By setting it to 25 g or more, the initial slip resistance value and the slip resistance value after change with time can be made sufficient. Moreover, by setting it as 1000 g or less, dropping of an excess granular material can be prevented, and it can make it difficult to impair the characteristics which the resin pavement, such as water permeability performance, sound absorption property, silence, freezing suppression performance, have. In consideration of workability, material cost, etc., 300 g or less is more preferable.

  It is preferable that the granular material is attached to the pavement surface in such a manner that at least a part of the granular material is buried in a resin binder. In order to attach in such a form, it is good to roll using a tire roller, a compactor, etc. after spraying a granular material. At that time, it is preferable to take measures such as placing a release sheet on the pavement surface or sticking to a rolling roller so that the resin binder does not adhere to the rolling machine.

[Measuring method]
(1) Luminance ratio The reference sample was spread on the bat so that the bottom of the bat was sufficiently hidden, and the luminance was measured with a luminance meter LS-100 manufactured by Minolta. The luminance of the sample to be evaluated was measured under the same conditions as this, and the ratio of the luminance with the luminance value of the reference sample as the denominator and the luminance of the sample to be evaluated as the numerator was calculated as a percentage. The n number was 3, and the average value was calculated.

(2) Particle size determination Granules were sieved with a sieve screen defined in JIS Z 8801-1-2000, and the particle size was determined.

  The granular material is divided into 500 g × 2, one 500 g is passed through a sieve screen having an opening of 3.35 mm, a frame diameter of 200 mm, and a depth of 60 mm, and the passing rate is measured, and the other 500 g is opened with an opening of 0.125 mm. The passing rate was measured through a sieve net having a diameter of 200 mm and a depth of 60 mm, and expressed as a mass fraction of passing portions in each opening.

(3) Slip resistance value Measured according to “Pendulum skid resistance tester method” described in “6-5 Method for measuring slip resistance of pavement surface” of Pavement Test Method Handbook (issued by Japan Road Association) The temperature was corrected by the equation, and the value was converted into British slip resistance value (BPN) C ₂₀ at 20 ° C.
C ₂₀ = −0.0071t ² + 0.9301t−15.79 + C _t
t (° C.): road surface temperature C _t at the time of _measurement: measured value of BPN at t ° C. C _20: as durability evaluation of the correction value or even slip of BPN to 20 ° C., stainless steel wire brush the measured surface Then, it was rubbed strongly for 30 reciprocations to observe the wear situation and the same measurement / conversion as above was performed.

(4) Road marking distinguishability Visually, the white line paint on the road surface that was easy to visually recognize was marked with ○, and the mark that was difficult to visually recognize was marked with ×.

[Example 1]
(Base pavement)
100 parts by mass of ceramic aggregate (artificial colored aggregate obtained by firing) having a particle size of 1.4 to 3.35 mm and 10 parts by mass of epoxy resin (Ameniflex (registered trademark) R manufactured by Toray Industries, Inc.) were mixed. The composition was paved in a 10 mm thick layer on the surface of the asphalt pavement to form a base pavement.

(Dispersion of granular materials)
90 parts by mass of black sandstone crushed stone No. 4 (particle size 0.3 to 1.18 mm) as black crushed particles and 10 parts by mass of tile waste as light-colored granular materials were mixed. The luminance ratio of black crushed stone particles based on artificial emery abrasive # 30 is 150%, and the luminance ratio of light-colored granular materials based on artificial emery abrasive # 30 is 550%. Black crushed stone particles The luminance ratio of the light-colored granular material with reference to 370 was 370%. Further, the passing rate of the mixed granular material with respect to a sieve having an aperture of 0.125 mm was 0% by mass, and the passing rate with respect to a sieve having an aperture of 3.35 mm was 100% by weight.

The mixed granular material was sprayed at a spraying amount of 200 g / m ² before the epoxy resin of the base pavement was cured.

(Rolling and curing)
Immediately after the spraying, a film was laid on the sprayed layer, and the tire roller was reciprocated twice to roll the film. Thereafter, it was cured for 3 hours.

  After confirming that the resin was cured, the sliding resistance was measured and found to be 77 at the initial stage and 73 after the brush wear.

[Examples 2 and 3, Comparative Examples 1 to 4]
Examples 2 and 3 and Comparative Examples 1 to 4 were carried out in the same manner as in Example 1 except that the breakdown of the granular materials and the application amount were changed as shown in Tables 1 and 2. In Example 2 and Comparative Example 3, black basalt was mechanically pulverized as black crushed stone particles to a particle size of 0.2 to 0.85 mm. In Comparative Example 1, grayish white No. 4 crushed stone (particle size: 0.3 to 1.18 mm) was used instead of black crushed stone.

  In Examples 1 to 3, due to the mixture of light-colored particles with respect to black crushed stone particles, the state of dispersion could be grasped when sprayed on the pavement surface, and it was possible to spray evenly. Also, the slip resistance was high both at the initial stage and after the brush wear. Moreover, since the composition ratio of the black crushed stone particles was 40% by weight or more, there was no glare due to road reflection, and the road marking discrimination with white paint was also high.

  In Comparative Example 1, grayish white crushed stone particles were used, so that after slipping material was attached to the surface of the pavement material, it turned whitish and there was glare due to reflection, and the road marking with white paint was difficult to identify.

  In Comparative Example 2, the composition ratio of tile waste was high, and after attaching a non-slip material to the surface of the pavement material, it became whitish, there was glare due to reflection, and the road marking with white paint was difficult to identify.

  In Comparative Example 3, since the particle size of the granular material was large, the anti-slip effect was small, and there were many missing particles due to brush wear, and the anti-slip effect was likely to be lowered.

  Comparative Example 4 was a case where no anti-slip material was attached. Since the resin mortar was exposed on the surface, the slip resistance value was low.

[Examples 4-6, Comparative Examples 5-8]
(Base pavement)
After applying a urethane resin primer to the surface of the 13 mm top water-permeable asphalt pavement, a gap between the surface aggregates was rubbed with a composition in which 100 parts by mass of rubber chip aggregate and 20 parts by mass of urethane resin were mixed, It was a base pavement.

(Dispersion of granular materials)
The granular material having the same breakdown as that used in each of Examples 1 to 3 and Comparative Examples 1 to 4 was sprayed in an amount corresponding to each of Examples 1 to 3 and Comparative Examples 1 to 4.

(Rolling and curing)
Each was carried out in the same manner as in Example 1.

  The sliding resistance value, glare, and road marking discrimination by white line paint were the same as those in Examples 1 to 3 and Comparative Examples 1 to 4 corresponding to the granular materials and the coating amount used.

Claims (5)

Of the aggregates that make up the pavement, it is a non-slip structure on the pavement surface in which the granular material is attached to the surface of the aggregate located on the surface layer of the pavement via a resin binder, and the granular material is black Of the igneous rock and / or black sedimentary rock, the composition ratio of the crushed stone particles in the granular material is within a range of 40 to 100% by mass, and the opening of the granular material is 0. 0%. An anti-skid structure for a paved surface, wherein a passage rate for a 125 mm sieve is 10% by mass or less, and a pass rate for the 3.35 mm sieve of the granular material is 90% by mass or more. The anti-skid structure for a paved surface according to claim 1, wherein the crushed stone grains have a luminance ratio of 60 to 180% when the artificial emery abrasive # 30 is used as a reference. The paving surface slip-proof structure according to claim 1 or 2, wherein the granular material includes a light-colored granular material together with the crushed stone particles. 4. The anti-skid structure for a paved surface according to claim 3, wherein the light-colored granular material has a luminance ratio of 400 to 1200% based on the artificial emery abrasive # 30. The non-slip structure for a paved surface according to any one of claims 1 to 4, wherein the amount of the granular material sprayed is 25 to 1000 g per 1 m ² of the paved surface.