JP2010053597A - Woody pavement material, and method of paving road surface and method of paving slope using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a woody pavement material, using wood chips having high heat island prevention effects. <P>SOLUTION: This woody pavement material is obtained by mixing wood chip, pit sand, cement, solidification material, and water. The wood chip is sawdust of 6-10 mm manufactured, by crushing scrap wood such as pruned wood and thinned wood. The cement is normal Portland cement. The solidification material is a "bittern" which is a base liquid remaining after salt is removed from seawater and which is formed mainly of magnesium chloride. The mixing ratio of the wood chip and the pit sand is 10:1 to 8:3 by volume, the mixing ratio of the cement by volume is 3% of the total use amount of the wood chip and the pit sand, and the mixing ratio of the solidification material by volume is 4% of the use amount of cement. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wood-based pavement suitable for use in pavement of roads such as sidewalks and bicycle paths in parks, gardens, and slopes such as sidewalks.

  In recent years, wood-based pavement materials using wood chips obtained by finely pulverizing waste materials such as pruned trees and thinned wood, and pavement methods using wood-based pavement materials have been proposed. As conventional coating methods, there are known a method in which wood chips are spread on a road surface and a special emulsion is dispersed and hardened, and a wood chip is mixed with a binder and a coagulant to spread on a road surface and solidified. Patent Document 1 proposes a pavement material used in the latter method.

Such wood-based pavement has the following advantages over asphalt pavement and the like.
(1) Environmental properties: Thinned wood and pruned trees are reused as chips, which is excellent in terms of environmental protection.
(2) Water permeability: Since it has high permeability such as rainwater, it is difficult to collect water.
(3) Cushioning property: Elasticity peculiar to wood chips can reduce the burden on the legs and waist during walking.
(4) Weed control: Weeding can be prevented by paving the inside of the planting ridge, and maintenance costs can be saved.
(5) Landscape: By using a translucent binder as a binder, the natural color of wood appears and the landscape is excellent.
JP 2008-75394 A

  Here, in recent years, a heat island phenomenon caused by asphalt pavement or the like has become a problem.

  An object of the present invention is to realize a wood-based pavement material using a wood chip that is excellent in the heat island phenomenon preventing effect while maintaining the advantages of the wood-based pavement material.

  Another object of the present invention is to propose a road pavement method and a slope pavement method using a wooden pavement material excellent in the effect of preventing the heat island phenomenon.

In order to solve the above problems, the present invention provides:
A wooden paving material manufactured by mixing wood chips, mountain sand, cement, solidifying agent and water,
Wood chips are 6mm to 10mm sawdust produced by crushing waste materials such as pruned trees and thinned wood.
Cement is usually Portland cement,
The solidifying agent is "Nigari", the main component of magnesium chloride, which is the remaining mother liquor obtained by removing salt from seawater.
The mixing ratio of wood chips and mountain sand is 10: 1 to 8: 3 by volume,
The cement volume ratio is 3% with respect to the total amount of wood chips and mountain sand used.
The mixing volume ratio of the solidifying agent is characterized by 4% of the amount of cement used.

Next, the present invention is a road pavement method using the wood-based pavement of this configuration,
Wood chips and mountain sand are kneaded at a ratio of 10: 1, and cement is added and kneaded, and then water and a solidifying agent are added and kneaded to prepare the wood-based paving material,
This wood-based pavement material is spread on a crushed stone roadbed formed on the road surface to be paved at a predetermined thickness,
Rolling and rolling the leveled wooden pavement material with a roller to form a wooden pavement surface layer with a thickness of 5 cm or more,
Cover this wooden pavement surface layer with a curing sheet and perform curing for a predetermined period of time,
After that, the curing sheet is removed to dry curing.

Further, the present invention is a slope pavement method using the above-structured wood-based pavement material,
Wood chips and mountain sand are kneaded at a ratio of 8: 3, and cement is added thereto and kneaded. Then, water and a solidifying agent are added and kneaded to prepare the wood-based paving material,
This wooden paving material is sprayed on the slope of the object to be paved at a pressure of ² to 3 kg / cm ² to form a wooden paving surface layer having a thickness of 5 cm or more,
Cover this wooden pavement surface layer with a curing sheet and perform curing for a predetermined period of time,
After that, the curing sheet is removed to dry curing.

  The road surface and slope surface paved using the wood-based paving material of the present invention are excellent in environmental performance, water permeability, cushioning properties, herbicidal properties, and scenic properties, and in comparison with Alfalt pavement etc. It was confirmed that the phenomenon prevention effect was excellent.

  Below, with reference to drawings, the example of the wooden paving material and the paving method to which the present invention is applied is described.

  Wood-based pavement materials were prepared by kneading wood chips, mountain sand, and cement at a blending ratio in the case of thickness T = 5 cm shown in Table 1. Wood chips are 6 mm to 10 mm sawdust produced by pulverizing waste materials (hardwood, conifers) such as pruned trees and thinned wood. The cement is usually Portland cement (JIS R 5210). The mixing ratio of wood chips and mountain sand was 10: 1 by volume, and the mixing volume ratio of cement was 3% with respect to the total usage of wood chips and mountain sand.

  Furthermore, an appropriate amount of a solidifying agent and an appropriate amount of water were added to these and kneaded. As the solidifying agent, “Nigari”, which is the remaining mother liquor obtained by removing salt from seawater, mainly composed of magnesium chloride was used. As this solidifying agent, for example, a commercially available product under the name “Purple Magic” can be used. The blending amount (kg) of the solidifying agent was 4% of the cement usage (kg).

  FIG. 1 is a process diagram showing a road surface paving process using a wooden paving material. If it demonstrates with reference to this figure, first, the kneading | mixing operation | work which prepares a wood type paving material with the mixture ratio published in Table 1 will be performed (S1: kneading process). The kneading operation may be performed at a factory or at a construction site. In this kneading operation, 1350 liters of a wooden pavement material was kneaded with a mixer. First, wood chips and mountain sand were put into a mixer and kneaded for 5 minutes. Next, cement was put into the mixer and kneaded for 10 minutes. Next, water and a solidifying agent were added to the mixer and kneaded for 10 minutes. In this way, a wooden paving material was prepared by kneading for a total of 25 minutes.

  Next, the wooden pavement was transported to the work place and spread on the pavement road surface (S2: spread leveling step). Here, on the road surface, a crushed stone roadbed was formed in advance by laying crushed stone with a predetermined thickness. The leveling thickness was set to 5 cm after the roller rolling operation in the next step.

  Thereafter, a roller rolling operation (S3: roller rolling step) was performed to form a woody pavement surface layer having a thickness of about 5 cm.

  Next, the wooden pavement surface layer was covered with a curing sheet (vinyl sheet) and cured for 3 days (S4: curing process). Thereafter, the curing sheet was removed and dried and cured for 3 days (S5: drying curing process) to obtain a wooden paved surface (S6).

  In addition, what is necessary is just to employ | adopt the compounding ratio of the column of thickness T = 7cm in Table 1 in the case of forming a wood-type pavement surface layer with a thickness of 7 cm and 10 cm.

  Next, a heat island phenomenon prevention effect measurement test was performed on the wooden pavement surface. In the test, the temperature change of the wooden pavement surface and the asphalt pavement surface under the same environmental temperature was measured. The measurement positions were performed immediately near the pavement surface, an aerial position 50 cm from the pavement surface, an aerial position 100 cm from the pavement surface, and an aerial position 200 cm from the pavement surface. FIG. 2 is a graph showing an example of test results.

  As can be seen from this graph, the test confirmed that the wood-based pavement surface according to the present invention has an average temperature near the surface that is 2 ° C. lower than that of the asphalt pavement surface. Further, even at a position 100 cm above the surface, it was confirmed that the wood-based pavement surface according to the present invention was about 1 ° C. lower than the asphalt pavement surface.

  Furthermore, according to the test by the present inventors, it has been confirmed that various properties such as water permeability and cushioning properties are equivalent to or better than those of conventional wood-based pavement materials using wood chips.

It is a general | schematic process figure which shows the Example of the road surface pavement method using the wooden paving material to which this invention is applied. It is a graph which shows an example of a heat island prevention effect measurement test.

Explanation of symbols

S1 Kneading step S2 Transporting and leveling step S3 Roller rolling step S4 Curing step S5 Dry curing step

Claims (3)

A wooden paving material manufactured by mixing wood chips, mountain sand, cement, solidifying agent and water,
Wood chips are 6mm to 10mm sawdust produced by crushing waste materials such as pruned trees and thinned wood.
Cement is usually Portland cement,
The solidifying agent is a bittern bite mainly composed of magnesium chloride, which is the remaining mother liquor obtained by removing salt from seawater.
The mixing ratio of wood chips and mountain sand is 10: 1 to 8: 3 by volume,
The cement volume ratio is 3% with respect to the total amount of wood chips and mountain sand used.
A wood-based paving material characterized in that the mixing volume ratio of the solidifying agent is 4% of the amount of cement used. A road surface paving method using the wooden paving material according to claim 1,
Wood chips and mountain sand are kneaded at a ratio of 10: 1, and cement is added and kneaded, and then water and a solidifying agent are added and kneaded to prepare the wood-based paving material,
This wood-based pavement material is spread on a crushed stone roadbed formed on the road surface to be paved at a predetermined thickness,
Rolling and rolling the leveled wooden pavement material with a roller to form a wooden pavement surface layer with a thickness of 5 cm or more,
Cover this wooden pavement surface layer with a curing sheet and perform curing for a predetermined period of time,
After that, the road pavement method is characterized by removing the curing sheet and drying and curing. A slope pavement method using the wooden pavement according to claim 1,
Wood chips and mountain sand are kneaded at a ratio of 8: 3, and cement is added thereto and kneaded. Then, water and a solidifying agent are added and kneaded to prepare the wood-based paving material,
This wooden paving material is sprayed on the slope of the object to be paved at a pressure of ² to 3 kg / cm ² to form a wooden paving surface layer having a thickness of 5 cm or more,
Cover this wooden pavement surface layer with a curing sheet and perform curing for a predetermined period of time,
Then, the slope pavement method is characterized by removing the curing sheet and drying and curing.

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