JPS593061Y2 - Formwork material for concrete foundation piles - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a formwork material for concrete foundation piles manufactured using difficult-to-disintegrate waste obtained in the waste paper recycling process as the main raw material.

Traditionally, the formwork used to form concrete foundation piles was made exclusively of wood, but the price of wood has recently skyrocketed, and there has been a demand for new materials to replace it.

For this reason, trials were conducted to use cardboard instead of wooden boards, but when a large amount of concrete is poured, such as when forming concrete foundation piles, the water in the concrete dissolves the cardboard and the weight The problem was that it could not hold up and collapsed.

On the other hand, in the process of manufacturing recycled paper by disintegrating waste paper, corrugated paper, etc. into fibers using a disintegrating machine such as a kneader, a tough fiber substance that does not disintegrate easily remains on the strainer of the disintegrating machine. The large amount of remaining material had been disposed of, but there was no proper way to dispose of it, and it was contributing to pollution.

The present invention aims to provide a formwork material for concrete foundation piles that can be manufactured at low cost by using the above-mentioned waste.

To explain the present invention in detail with reference to an example diagram, used paper9 corrugated paper, which is normally collected as waste, contains small metal pieces such as staplers, duct tape, glue, etc. that are used to construct packaging boxes, etc. Contaminants such as adhesives, vinyl strings, small plastic pieces, dirt, etc. are mixed in, but if this is passed through the disintegration machine as is, these contaminants will be removed by approximately 10%.
A moderately difficult to disintegrate tough fibrous material remains on the strainer.

In the present invention, the raw material is prepared by blending 3 to 7% asphalt emulsion with a small amount of sulfuric acid bread soil, either with or without the impurities.

This raw material is formed into a thick paper body containing 30 to 70% moisture using a known cylinder paper machine, and this thick paper body is molded into a thick paper body using a mold under a pressure of 30 kg/cm2. Temperature 160-2
It is dried by hot pressing at 50° C. for about 5 minutes to form the plate-shaped body 1 shown in FIG.

As another molding method, the raw material is poured into a dehydration mold, vacuum dehydrated, and then heated and compression molded in a hot pressure mold to obtain the plate-shaped body 1 shown in FIG.

Note that there are a plurality of through holes 2, 2, . . . on both end edges of the plate-shaped body 1.
are arranged in a row, the plate-shaped body is wound into a cylindrical shape, and the rivets 3, 3... are inserted into the through holes 2, 2... at the overlapping portions of the both side edges. By doing so, it can be used as the formwork material of the present invention.

The asphalt emulsion mixed into the raw material prevents moisture from penetrating, and the water absorption rate of the finished formwork material can be kept below 30%.In addition, the asphalt emulsion is heated and pressed in the mold. It can combine with fibers to give products a unique stickiness.

Furthermore, the sulfuric acid pan acts as a fixing agent for fixing the asphalt emulsion onto the fibers.

Figure 3 shows the measured state of this formwork material 1, where 4 shows the concrete pile poured into the ground, 5 shows the reinforcing bars, and 6 shows the concrete poured into the formwork material 1. .

As is clear from the above examples, the formwork material of the present invention has the following effects.

(b) Since it uses waste as raw material, it prevents pollution.

(b) Manufacturing costs are low because the raw materials are cheap and can be obtained in large quantities.

(c) It is lightweight and easy to handle because it can be stored in an unfolded state.

) It can be assembled by one person and is easier to assemble than wooden formwork.

(e) Addition of asphalt emulsion suppresses water permeability and increases strength, so concrete 1 is less likely to be damaged by pressure.

(F) Since it can be obtained at a low cost, it can be used by embedding it without having to remove it like wooden formwork after concrete hardens, which saves the trouble of removing it and shortens the construction period.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a perspective view of the plate-shaped body when it is unfolded, Fig. 2 is a perspective view of the plate-shaped body when it is assembled into a formwork, and Fig. 3 is a perspective view of the plate-like body when it is assembled into a formwork. It is a longitudinal cross-sectional view showing the state. 1...Plate-shaped body, 2...Through hole, 3...
···rivet.

Claims (1)

[Scope of utility model registration request] Waste paper 9 Asphalt emulsion is added together with sulfuric acid bread to the tough fiber material that is discharged due to difficulty in disintegrating during the disintegration process of corrugated paper, etc., and this is dehydrated and hot-pressed into a plate shape and dried. A formwork material for a concrete foundation pile, characterized in that a plurality of through holes are arranged in a row on the edge, the plate-like body is wound into a cylindrical shape, and the overlapping portions of both side edges are fixed with rivets.