WO2020119102A1

WO2020119102A1 - Degradable drainage board, material composition, and manufacturing process therefor

Info

Publication number: WO2020119102A1
Application number: PCT/CN2019/095220
Authority: WO
Inventors: 李德光; 肖望; 姜磊; 吉明; 张权
Original assignee: 江苏中联路基工程有限公司
Priority date: 2018-12-12
Filing date: 2019-07-09
Publication date: 2020-06-18
Also published as: CN109627799A

Abstract

A degradable drainage board, a material composition, and a manufacturing process therefor, related to the technical field of drainage boards. A degradable board body is manufactured with a plant fiber at 65-75% and a solid adhesive agent at 25-35% in terms of mass percent as raw materials and then covered with a layer of degradable filter to acquire the degradable drainage board. The board has readily available raw materials and is inexpensive, the manufacturing method is simple and easy, the manufactured drainage board is degradable, the drainage board loses drainage effects once degraded, thus preventing the subsidence of a constructed foundation, and provides great environmental friendliness and energy-saving performance.

Description

Degradable drainage board, material composition and preparation process thereof

Technical field

The invention belongs to the technical field of drainage boards, and particularly relates to a degradable drainage board, a material composition and a preparation process thereof.

Background technique

The existing drainage boards are all plastic drainage boards (as shown in Figure 1), and the main structure includes a board body and a screen 3 covering the outside of the board body. In order to improve the structural strength of the board body and improve the drainage smoothness, the board body usually includes an intermediate board 1 and support plates 2 provided on both sides of the middle plate 1. Insert the drainage board into the soft ground with a plug-in machine. Under the preload of the upper part, the void water in the soft ground is discharged from the plastic drainage board to the sand layer or the horizontal plastic drainage pipe on the upper pad, and then discharged from other places. Can accelerate the consolidation of soft ground.

However, the existing plastic drainage board is not degradable after it is inserted into the ground, which will pollute the environment. If it is taken out and recycled after use, it will take time and effort, greatly increasing the construction cost, and the plastic drainage board has been underground, which is easy to cause The foundation settlement after construction.

Summary of the invention

The purpose of the present invention is to provide a degradable drainage board, material composition and its preparation process in view of the deficiencies of the prior art. The raw materials are easily available, the cost is low, the preparation method is simple and easy, and the prepared drainage board is degradable and degradable After the drainage plate loses the drainage effect, the foundation will not settle after construction, and the environmental protection and energy saving are good.

The present invention provides the following technical solutions:

A material composition of a degradable drainage board includes plant fibers and a solid adhesive, the plant fiber has a mass percentage of 65-75%, and the solid adhesive has a mass percentage of 25-35%.

Preferably, the raw materials of the plant fiber include wheat straw, corn stover, bamboo fiber, pine fiber, coconut shell fiber, abaca fiber and rice husk powder. The mass fraction of each raw material is: 12-17 parts of wheat straw, corn 15-20 parts of straw, 6-11 parts of bamboo fiber, 20-25 parts of pine fiber, 5-13 parts of coconut fiber, 10-17 parts of abaca fiber, and 4-12 parts of rice husk powder.

Preferably, the mass fraction of each raw material in the plant fiber is: wheat straw 14-17 parts, corn straw 17-18 parts, bamboo fiber 8-10 parts, pine fiber 20-25 parts, coconut shell fiber 7-13 Parts, 12-15 parts of abaca fiber, 5-10 parts of rice husk powder.

A degradable drainage board includes a degradable board body, the degradable board body includes a plant fiber with a mass percentage of 65-75% and a solid adhesive of 25-35%, and the surface of the degradable board body is covered with a The degradable filter layer is composed of convex strips and grooves distributed between each other.

Preferably, the thickness of the convex strip is greater than or equal to 1 mm.

Preferably, the overall thickness of the degradable plate body is 3.5-6 mm.

Preferably, the corner where the convex strip is in contact with the groove is arc-shaped.

Preferably, the convex strip has a rectangular or trapezoidal cross-sectional shape.

A preparation process of degradable drainage board includes the following steps:

S1, according to the quality parts, 12-17 parts of wheat straw, 15-20 parts of corn straw, 6-11 parts of bamboo fiber, 20-25 parts of pine fiber, 5-13 parts of coconut shell fiber, 10-17 parts of abaca fiber , 4-12 parts of rice husk powder, mixing the raw materials to obtain plant fiber;

S2. Mix the plant fiber with a mass percentage of 65-75% and the solid adhesive of 25-35% and stir it evenly, then pass the platen device through the platen 3-5 times to compress it into a flat plate;

S3. Slot the flat plate obtained in S2 through a molding die to obtain a degradable plate body composed of convex strips and grooves distributed between each other;

S4. A layer of degradable filter is coated on the surface of the degradable plate to obtain the degradable drainage plate.

Preferably, the plant fiber in S2 is mixed with the solid adhesive and then heated to 120-180°C for pressing.

The beneficial effects of the present invention are: plant fiber and solid adhesive as raw materials, easy to obtain and low cost, plant fiber has degradable properties; the preparation process of the drainage board is simple and easy, and can be mass-produced; the prepared drainage board is degradable, The degraded drainage board loses the drainage effect, so that the foundation will not settle after construction, and the environmental protection and energy saving are good.

BRIEF DESCRIPTION

The drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the embodiments of the present invention are used to explain the present invention, and do not constitute a limitation of the present invention. In the drawings:

Figure 1 is a schematic diagram of the structure of the existing plastic drainage board;

2 is a schematic structural view of the degradable drainage board in Example 1;

3 is a schematic view of the structure of the degradable drainage board in Example 2. FIG.

The marks in the picture are: 1. middle plate; 2. support plate; 3. filter screen; 4. convex strip; 5. groove; 6. degradable filter screen; 7. corner.

detailed description

Example 1

S1. Mix the raw materials in the proportion of 12 parts of wheat straw, 15 parts of corn straw, 6 parts of bamboo fiber, 20 parts of pine fiber, 5 parts of coconut shell fiber, 10 parts of abaca fiber, and 4 parts of rice husk powder. Obtain plant fibers;

S2. Mix the plant fiber with a mass percentage of 75% and the solid adhesive with 25% and stir it evenly, then heat to 120°C, and press it with a plate pressing device five times to compress it into a flat plate;

S3. Slot the flat plate in S2 through a forming mold to obtain a degradable plate;

As shown in FIG. 2, the obtained degradable drainage board includes a degradable board body. The surface of the degradable board body is covered with a layer of degradable filter 6. The degradable board body is composed of convex strips 4 and grooves distributed between each other. 5. The corner 7 where the convex strip 4 and the groove 5 are in contact is rounded. The thickness of the convex strip 4 is equal to or greater than 1 mm. The overall thickness of the degradable body is 3.5-6 mm. The cross-sectional shape of the convex strip is rectangular. The structure and thickness of the degradable plate body can meet the hardness requirements, so that the drainage plate can be smoothly inserted into the ground for drainage; it can be degraded after being inserted into the ground for 7 months, so that the foundation will not settle after construction, and the environmental protection and energy saving are good.

Example 2

S1. Mix the raw materials in the proportion of 17 parts of wheat straw, 20 parts of corn straw, 11 parts of bamboo fiber, 25 parts of pine fiber, 13 parts of coconut shell fiber, 17 parts of abaca fiber, and 12 parts of rice husk powder. Obtain plant fibers;

S2. Mix the plant fiber with a mass percentage of 65% and a solid adhesive of 35% and stir it evenly, then heat to 180°C, and press the platen device through the platen three times to compress it into a flat plate;

As shown in FIG. 3, the obtained degradable drainage board includes a degradable board body, and the surface of the degradable board body is covered with a layer of degradable filter screen 6, and the degradable board body is composed of convex strips 4 and grooves distributed between each other 5. The corner 7 where the convex strip 4 and the groove 5 are in contact is rounded. The thickness of the convex strip 4 is equal to or greater than 1 mm. The overall thickness of the degradable body is 3.5-6 mm. The cross-sectional shape of the convex strip is trapezoidal. The structure and thickness of the degradable plate body can meet the hardness requirements, so that the drainage plate can be smoothly inserted into the underground for drainage; it can be degraded after being inserted underground for 6.5 months, so that the foundation will not settle after construction, and it has good environmental protection and energy saving.

Example 3

S1. Mix the raw materials in the proportion of 15 parts of wheat straw, 17 parts of corn straw, 10 parts of bamboo fiber, 22 parts of pine fiber, 10 parts of coconut shell fiber, 15 parts of abaca fiber, and 8 parts of rice husk powder. Obtain plant fibers;

S2. Mix the plant fiber with a mass percentage of 70% and the solid adhesive with 30% and stir it evenly, then heat to 140°C, press the plate with a plate pressing device four times, and compress it into a flat plate;

Example 4

S1. Mix the raw materials in the proportion of 14 parts of wheat straw, 17 parts of corn straw, 8 parts of bamboo fiber, 20 parts of pine fiber, 7 parts of coconut shell fiber, 12 parts of abaca fiber, and 5 parts of rice husk powder. Obtain plant fibers;

S2. Mix the plant fiber with a mass percentage of 65% and a solid adhesive of 35% and stir it evenly, then heat to 160°C, press the plate with a plate pressing device four times, and compress it into a flat plate;

As shown in FIG. 3, the obtained degradable drainage board includes a degradable board body, and the surface of the degradable board body is covered with a layer of degradable filter screen 6, and the degradable board body is composed of convex strips 4 and grooves distributed in phase 5. The corner 7 where the convex strip 4 and the groove 5 are in contact is rounded. The thickness of the convex strip 4 is equal to or greater than 1 mm. The overall thickness of the degradable body is 3.5-6 mm. The cross-sectional shape of the convex strip is trapezoidal. The structure and thickness of the degradable plate body can meet the hardness requirements, so that the drainage plate can be smoothly inserted into the ground for drainage; it can be degraded after being inserted into the ground for 7.5 months, so that the foundation will not settle after construction, and the environmental protection and energy saving are good.

The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still perform the foregoing embodiments The recorded technical solutions are modified, or some of the technical features are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

A material composition of a degradable drainage board is characterized by comprising plant fibers and a solid adhesive, the plant fiber has a mass percentage of 65-75%, and the solid adhesive has a mass percentage of 25-35%.
The material composition of a degradable drainage board according to claim 1, characterized in that the raw materials of the plant fiber include wheat straw, corn straw, bamboo fiber, pine fiber, coconut shell fiber, abaca fiber and rice Shell powder, the mass fraction of each raw material is: wheat straw 12-17 parts, corn straw 15-20 parts, bamboo fiber 6-11 parts, pine fiber 20-25 parts, coconut shell fiber 5-13 parts, abaca fiber 10-17 servings, 4-12 servings of rice husk powder.
The material composition of the degradable drainage board according to claim 2, wherein the mass fraction of each raw material in the plant fiber is: 14-17 parts of wheat straw, 17-18 parts of corn straw, bamboo 8-10 parts of fiber, 20-25 parts of pine fiber, 7-13 parts of coconut shell fiber, 12-15 parts of abaca fiber, 5-10 parts of rice husk powder.
A degradable drainage board, characterized in that it includes a degradable board body, the degradable board body includes a plant fiber with a mass percentage of 65-75% and a solid adhesive of 25-35%, and the degradable board body The surface is covered with a layer of degradable filter screen, and the degradable plate body is composed of convex strips and grooves distributed between each other.
The degradable drainage board according to claim 4, wherein the thickness of the convex strip is greater than or equal to 1 mm.
The degradable drainage board according to claim 4, wherein the overall thickness of the degradable board body is 3.5-6 mm.
The degradable drainage board according to claim 4, characterized in that the corner of the convex strip connecting with the groove is arc-shaped.
The degradable drainage board according to claim 4, wherein the cross-sectional shape of the convex strip is rectangular or trapezoidal.
A preparation process of degradable drainage board is characterized by comprising the following steps:

S1, according to the quality parts, 12-17 parts of wheat straw, 15-20 parts of corn straw, 6-11 parts of bamboo fiber, 20-25 parts of pine fiber, 5-13 parts of coconut shell fiber, 10-17 parts of abaca fiber , 4-12 parts of rice husk powder, mixing the raw materials to obtain plant fiber;

S2. Mix the plant fiber with a mass percentage of 65-75% and the solid adhesive of 25-35% and stir it evenly, then pass the platen device through the platen 3-5 times to compress it into a flat plate;

S3. Slot the flat plate obtained in S2 through a molding die to obtain a degradable plate body composed of convex strips and grooves distributed between each other;

S4. A layer of degradable filter is coated on the surface of the degradable plate to obtain the degradable drainage plate.
The preparation process of a degradable drainage board according to claim 9, wherein the plant fiber and solid adhesive in the S2 are mixed and heated to 120-180°C for pressing.