KR900007077B1 - Hardening composition and method for producing thereof - Google Patents

Abstract

A woody fiber-reinforcing hardening material compsn. comprises 55-70% paper sludge of at most 10% water content, 5-25% inorganic hydraulic cement, 0.5-10% lime, 0.5-2% sodium silicate, 0.01-2% water-soluble polymer resin, 3-10% gypsum, 0.05-2% hardening promotive, 0.5-4% noninflammable agent, 1-11% filler, 0.011% water-lowering agent, 0.5- 2% blowing agent and 30-70% blending water. The hardening material has a good durability and soundproof.

Description

Composition of wood fiber-reinforced cured product and preparation method thereof

The present invention relates to a composition and a method for producing the wood fiber reinforcement using a sludge that is discarded because it can no longer be used after making a product using wood, pulp, paper, etc. as a raw material in a paper mill.

In other words, since paper sludge is generated in large quantities in each paper mill, it is a fact that it is very difficult to dispose of it as a pollutant that pollutes the surrounding environment as well as water quality.

The present invention recovers paper sludge, which is an industrial waste material having such defects, and forms and hardens it into various forms such as plates, bricks, and pillars as raw materials, and construction materials such as boards (tex) and wood substitutes for ceiling construction. In order to prevent pollution by making industrial materials and at the same time, to contribute to the development of national industry by promoting economic benefits and saving of existing resources, the present invention will be described in detail as follows.

In the present invention, about 55-70% of the paper sludge dried to some extent, as a binder, about 10-25%, quicklime and slaked lime about 0.5-10%, sodium silicate 0.5-2%, and water-soluble curable resin about 0.01- 2%, dihydrate gypsum (CaSO ₄ 2H ₂ O) and anhydrous gypsum (CaSO ₄ ) about 3-10%, curing accelerator about 0.05-2%, nonflammable about 0.5-4%, filler about 1-11%, water reducing agent 0.01 -1%, 0.5-2% of blowing agent, added to the mixture of about 30-70% of the total mixture, kneaded uniformly and plate or brick or column under pressure or atmospheric pressure at 0-300kg / cm ₂ It is molded into a shape such as, and then cured by means such as normal temperature or normal pressure or steam curing to produce a strong and elastic algebraic hardened body as a binder in the above composition; Hydraulic cements such as portland cement, blast furnace slag cement, crude steel cement and alumina cement are used, and as water-soluble curable resins, vinyl acetate resin, acrylic resin, PVA, phenolic resin, etc. are used, and as a curing accelerator: calcium chloride, chloride Barium, sodium chloride, magnesium chloride, etc. are used, As a nonflammable agent; Ammonium phosphate, ammonium dihydrogen phosphate, ammonium sulfate, borax, antimony trioxide, titanium dichloro acetate, and as a filler; Powders (325 mesh or less), such as diatomaceous earth, limestone, silica, briquettes, etc. are preferable.

The sludge of the waste paper used as the raw material of the present invention is a relatively short wood fiber, which is crosslinked with the hardened particles in the hardener tissue to impart strong elasticity and tensile strength, and the hardened water-soluble polymer resin is crosslinked with the hardened fiber. By hardening the hardened structure, it will prevent dry shrinkage and not break at the same time. Especially, the composition of the waste paper used in the present invention is wood fiber and filler (inorganic) in a ratio of 7: 3. Because of the composition, the wood fiber of the sludge is combined with the inorganic binder and the filler to be buried in the hardened tissue of the present invention, so that it has an incombustible flame retardancy, and when the flame retardant is added, micelles (fine capillaries) It penetrates into the inside and the non-flammability is reinforced to increase safety. It will be.

Particularly, one of the features of the present invention is the addition of quicklime and slaked lime to induce pozzolan reactions with siliceous in the sludge or filler, which results in high strength, resulting in strength reinforcement reaction with hydration of cement, and thus filler particles of calcium silicate. (CaO, SiO ₂ xH ₂ O) was formed to be a strong bond. In addition, the cured product made of the composition of the present invention has a different density depending on the amount of the raw material blended and the molding pressure curing conditions. The structure has characteristics that can be utilized for various purposes arbitrarily in accordance with its use characteristics, such as the strength characteristics are improved by forming a stronger hardened body.

In general, building interior materials such as ceiling boards and partitions are non-combustible, but most of these interior materials are calcium silicate-based reinforcing fibers, which are mixed with asbestos. Building materials using gypsum as binders are non-flammable, but they are pyrolysis due to high heat in case of fire, which emits sulfuric anhydride, which is very toxic to humans. .

Gypsum slowly decomposes the crystal water at 45 ℃ or higher, and completely decomposes at 350 ℃ or higher.

However, the cured body formed of the composition of the present invention is not at all dangerous as described above, does not decompose well even at high temperatures, has high bending strength (bending fracture strength), is flame retardant and excellent in heat insulation (simpleness), sound insulation and durability. As the specific gravity is light and the workability is improved, the practical use value is further enhanced. The test results according to the test specification of the building interior board (KSF 4031) are as follows. .

Example 1

Sludge 68.4%

Portland Cement 17.1%

Water Soluble Acrylic Resin 1.7%

Ammonium Phosphate 0.8%

Limestone Powder (100 Mesh) 11.4%

Calcium Chloride 0.6%

(The above unit is WT%)

The amount of coma is about 40% of the total amount.

The above mixture was evenly kneaded, molded and cured at room temperature and atmospheric pressure to obtain a composition having the following physical properties.

Example 2

Sludge (slightly dried) 54.6%

Blast furnace slag cement 27.3%

0.7% water soluble vinyl acetate resin

Calcium Chloride 1.4%

Silica powder (60 mesh) 13.6%

2 gypsum 0.5%

Dihydrogen ammonium phosphate 0.3%

Slaked lime 1.6%

(The above unit is WT%)

The amount of coma is about 37% of the total amount.

The above mixture was mixed and steam cured to obtain a strong and excellent elastic composition, the characteristics of which are as follows.

Example 3

Sludge (slightly dried) 63.6%

Crude Steel Cement 19.1%

Water Soluble Carbonate Resin 0.8%

Sodium silicate (3 #) 3.7%

Briquette Ash Powder (100 Mesh) 12.7%

Water reducer (melment F-10) 0.1%

The amount of coma is; About 36% of total mixture.

The above composition was sufficiently mixed, kneaded and molded like a blended water, and then cured, thereby preparing a mixture having excellent thermal insulation, sound insulation, and workability.

Example 4

Sludge (slightly dried) 59.4%

Normal Cement 25.7%

Quicklime 0.9%

Barium Chloride 0.7%

Water Soluble PVA 1.5%

Antimony trioxide 3.9%

Diatomaceous Earth Powder (120 Mesh) 7.9%

(The above unit is WT%)

The amount of coma is about 35% of the total amount.

The above mixture was uniformly mixed and molded to form a light (weight specific gravity 0.9) plate with a large soundproofing effect and a thermal insulation effect, thereby obtaining a hardened product having a white processability.

Example 5

Sludge (slightly dried) 56.0%

Blast furnace slag cement 14.0%

Crude Steel Cement 14.9%

Arc Resin Latex 1.9%

Silica powder (40 mesh) 11.2%

Magnesium chloride 1.0%

Borax 0.3%

Anhydrous gypsum (CaSO ₄ ) 0.6%

Titanium Dichloracetate 0.1%

(The above unit is WT%)

The amount of coma is about 35% of the total amount.

The above composition was mixed and molded to obtain a cured product having excellent elasticity and excellent incombustibility.

Example 6

Sludge (slightly dried) 64.6%

Back cement 10.4%

Almina Cement 10.4%

Sodium chloride 1.1%

Slaked lime 1.8%

Metal salt acrylic acid solution 0.9%

Ammonium sulfate 1.6%

2 gypsum 0.6%

Anhydrous Gypsum 0.4%

Quartz powder 8.4%

(The above unit is WT%)

The amount of coma is about 36% of the total mixture.

The above mixture was uniformly kneaded, molded at a pressure of 50 kg / cm 2, and pressure cured with a pressurized steam of 10 kg / cm 2 to obtain a strong and elastic composition having a compressive strength of 300 kg / cm 2 and a bending strength of 82 kg / cm 2.

Example 7

Sludge (slightly dried) 59.8%

Normal Cement 22.8%

Slaked lime 2.0%

Ammonium Phosphate 1.2%

Silica Powder 9.0%

Barium Chloride 0.9%

Sodium silicate 2.1%

1.6% of blowing agent

Acryl soluble resin 0.6%

(The above unit is WT%)

The amount of coma is about 68% of the total mixture.

The above mixture was uniformly mixed, and then kneaded sufficiently as in the blended water to be molded and cured. The apparent specific gravity was 0.5% and the thermal conductivity (KCal / m 2 h ° C.) was 0.046.

However, the above embodiment is not limited thereto, and in particular, the amount of water contained in the sludge can be replaced by the amount of coma.

Claims (2)

Paper sludge dried with water content of about 10% or less is the main raw material, the above-mentioned paper sludge 55-70%, mineral hard cement 5-25%, quicklime and calcined lime 0.5-10%, sodium silicate 0.5-2%, 0.01-2% of water-soluble polyhydric resin, 3-10% of hydrated gypsum and anhydrous gypsum, 0.05-2% of hardening accelerator, 0.5-4% of non-flammable agent, 1-11% of filler below 325 mesh, 0.01-1% of water reducing agent It is prepared by adding the compounding water equivalent to 30-70% to the mixture and kneading it uniformly, and then molding it into the shape of a plate, a building material, etc. by using the dough to produce room temperature or steam curing (atmospheric pressure or pressure). A method for producing a wood fiber reinforced hardened body, characterized in that. Paper sludge dried with water content of about 10% or less is the main raw material, but the above-mentioned paper sludge 55-70%, mineral hardened sheet 5-25%, quicklime and slaked lime 0.5-10%, sodium silicate 0.5-2% , 0.01-2% of water-soluble polyester resin, 3-10% of dihydrate and anhydrous gypsum, 0.05-0.2% of hardening accelerator, 0.5-4% of nonflammable agent, 1-11% of filler less than 325 mesh, 0.01-1% of water reducing agent A composition of wood fiber-reinforced tablets, wherein the mixture is formulated with a blending water corresponding to 30-70% of the total mixture.