JPS59203740A - Water-penetrating pavement material and manufacture - 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] It is an object of the present invention to allow rainwater to infiltrate into the ground to ensure a sufficient water supply to street trees, and to prevent large amounts of rainwater from concentrating and flowing into sewers and rivers. This invention relates to a sidewalk paving material that has sufficient water permeability for water use, and a method for producing the same.

Conventional water-permeable sidewalk paving materials are porous sintered ceramic materials, and because they are high-temperature sintered products, they are not only expensive and expensive, but also slippery and difficult to walk on, especially when wet with ice. was there.

In view of the above-mentioned circumstances, the object of the first invention is to achieve low cost in terms of both raw material cost and manufacturing cost, and to
The purpose of the present invention is to provide a water-permeable sidewalk paving material that is non-slip and comfortable to walk on.

The feature of the water-permeable sidewalk paving material according to the first invention is that it is a hardened cement product whose aggregate is granulated slag obtained by melting waste, and its effects are as follows.

In other words, it uses granulated slag obtained by melting waste such as industrial waste, sewage sludge, and municipal garbage.
The cost of raw materials can be extremely low, and it is also extremely effective in terms of waste treatment and resource conservation. Moreover, it is a hardened cement product.

Not only is no thermal energy required for molding, but
Equipment for manufacturing can be easily constructed.

Furthermore, this point is a major feature, but granulated slag
By nature, the coarse grain ratio is high; in other words, fine aggregates made from natural river sand and mountain sand have a coarse grain ratio of 2.3~! , is about 0, but the main issue is 1
The coarse grain ratio of the granulated slag is about J, 0-g, j, and when molded with cement, it has a porous filling structure F and a particle size distribution that tends to break, so it is made to have water permeability. There is no need for special particle size adjustment, and therefore manufacturing costs can be extremely low. Overall, we are able to provide permeable sidewalk pavement VR that is extremely inexpensive compared to conventional products, and is advantageous in terms of manufacturing and resource saving. Became.

Furthermore, the friction coefficient of the surface of the molded product is lower than that of conventional products, especially due to the fact that the particles of granulated slag have an appropriately angular shape and an appropriate size. It has become possible to obtain a sidewalk paving material that is noticeably slippery and therefore slip-resistant and easy to walk on without requiring any special processing, and which is also excellent in terms of safety.

An object of the second invention is to provide a method for manufacturing the excellent water-permeable sidewalk paving material according to the first invention in an extremely simple manner.

The characteristic means of the manufacturing method according to the second invention is that the granulated slag, cement and water obtained by melting the waste are mixed so that the cement becomes immediately Jjθ to jθθ with respect to the granulated slag/go, and Mix the mixture so that the weight ratio of cement to water is □~□/θOθ 1000, put the mixture into a mold, and pressurize the mixture in the mold with a pressure of 3~/θh/at. Its functions and effects are as follows.

Simply add granulated slag, cement and water.

By simply mixing the mixture at an appropriate ratio, placing it in a mold, applying light pressure for a while and leaving it there, you can create a sidewalk paving material that has sufficient water permeability as specified, is non-slip, and is easy to walk on. Therefore, safe and excellent performance sidewalk paving materials can be produced in Okura very easily in terms of equipment and labor.

Next, examples will be shown.

Granulated slag obtained by quenching molten slag from incineration of sewage sludge with water/-, ordinary Portland cement) yyo
h, and water/θJK? A slag mortar was prepared by mixing in the following proportions.

The particle size structure of the granulated slag used and the difference between it and the particle size structure of general fine aggregate are shown in the table below.

Next, as shown in Fig. 1, the rectangular cylindrical form (2) is removably inserted into the box-like form fl, and the rectangular cylindrical form (2) is removably inserted into the box-like form fl.
2) Filled with slag mortar, the filled slag mortar (3) was compacted with a weak force of approximately j If/- using a pressing tool.

Next, remove the rectangular cylindrical formwork (2) and remove the slag mortar (3).
) is filled with ordinary cement mortar prepared separately, compact the mortar again with a weak force as before, leave the mortar to harden, and place the cured product into a box-shaped formwork. As shown in Fig. 2, a part of the granulated slag (6) is exposed. Got it in condition.

Next, when the properties of the cured slag mortar material (5) were measured, the bulk specific gravity was 2. θ, the permeability coefficient is about /θ-2 or more, the dry friction coefficient is about 7j, the wet friction coefficient (measurement method according to ASTM E 303-66T) is about 20, and the wet state But the rest didn't change,
It had sufficient water permeability and was non-slip and easy to walk on.

Another example is shown below.

The waste that is the raw material for granulated slag may be of any type, and the type of shattered cement may be selected from known ones, and the shape and dimensions of the sidewalk paving material, size, etc. may be changed as appropriate. For example, it is possible to omit the above-mentioned ordinary hardened mortar for reinforcement (4).

- The method for manufacturing the sidewalk paving material according to the first invention is not particularly limited, and any suitable means can be used.

In the second invention, the mixing ratio of granulated slag, cement and water is 360% of cement to granulated slag/-
Njθθ, desirably yoo-ys.

The weight ratio should be set to /θθθ ~ /θOθ, and the pressure applied to the mixture in the formwork should be set so that the bulk specific gravity of the cured slag mortar product is less than 2.3. 3
~10-1 Preferably #i:y-.

In addition, mixing, injection into formwork, and pressurization can be done manually.
Appropriate equipment may be used, and the shape, dimensions, material, structure, etc. of the formwork can be changed freely.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the manufacturing method of the present invention, and FIG. 2 is a perspective view showing an embodiment of the sidewalk paving material of the present invention. 3

Claims (1)

[Claims] ■ A permeable sidewalk paving material that is a hardened cement product whose aggregate is granulated slag obtained by melting waste. ■ The granulated slag, cement and water obtained by melting the waste are granulated slag/m' [whereas the cement is 33
0-6004 and the weight ratio of cement to water is □~□ /θθθ /θOθ, put the mixture into a mold, and the mixture in the mold, A method for manufacturing a water-permeable sidewalk paving material, which is cured by applying pressure at a pressure of 3 to /θh/at.