KR960011332B1 - Process for the preparation of a brick - Google Patents

Abstract

The water permeable brick is made by screening a crushed material of 0.5 to 5 mm, which is obtained by crushing waste red brick, waste tile and waste pottery; adding 8-20 wt.% fine powder of 0.5 mm or less from the remaining crushed material; mixing and stirring 8-15 wt.% organic binder to mold a brick body; forming a mixture layer of a ceramic spheroid having an average size of 0.5 to 3 mm, the organic binder and water glass on one side of the brick body; and firing the brick at a temperature of 1,000 - 1,250 deg. C for 2-2.5 hours.

Description

Permeable brick with ceramic concrete layer and its manufacturing method

Definition of Terms

The pulverized aggregate such as waste pottery refers to particles obtained by crushing discarded red brick, waste tile, and waste pottery into 0.5 to 5 millimeters in size. The fine particle pulverized product refers to particles of 0.5 millimeter or less that are produced when pulverizing aggregated aggregates such as waste ceramics.

Currently used bricks can be divided into two types: cement brick and red brick. The red brick is vacuum-mixed by mixing clay with water, extruded into a rectangular nozzle hole of a certain standard, cut into a predetermined standard length, and dried and fired. ) Is manufactured.

The red brick thus manufactured can be easily purchased in large quantities as a raw material, and it uses relatively homogeneous and plastic branched clay. However, when branched clay is used, it cannot generally be colored other than red, and it must be fired at a relatively high temperature (1100 ~ 1250 ℃), resulting in high heat energy consumption and uneven shrinkage of around 10%.

Although the strength of the red bricks produced in this way is good, it is not permeable and irregular shrinkage during sintering prevents the surface from becoming a smooth flat surface. There are many occasions when you need to supplement your work.

The present invention solves the above disadvantages of the general red brick manufactured using the branched clay and at the same time has a strong strength, good water permeability and little or no water retention, and the brick surface is beautiful. The present invention relates to the manufacture of permeable bricks suitable for exterior and permeable floor pavement.

The water-permeable brick of the present invention is an aggregate of pulverized red bricks, waste tiles, waste ceramics, etc. in the size of 0.5 to 5 millimeters as aggregate, without adding clay, and instead of adding a certain amount of particulate pulverized powder. By forming a brick body by acting as a binder, a ceramic concrete layer is formed on one side of the brick body.

Bricks, such as floor walkways, have a constant size and high strength, and at the same time have good permeability. When clay is used as a caking agent for crushed aggregates such as waste ceramics, bricks having good strength and good permeability cannot be obtained. In other words, too little clay adds strength and too much clay results in water permeability. However, when the fine particle pulverized material is used as a caking additive, a permeable brick having both good strength and permeability can be obtained, and the optimum mixing amount of the fine particle pulverized is also wide.

Currently there are more than 2000 manufacturers of bricks, tiles, ceramics, etc. in these companies, a large amount of defective products are generated, and a large part of these defective products are not used and are buried in the ground or thrown away in secluded places. It causes. However, in the present invention, such waste resources can be recycled to reduce soil pollution and reduce costs.

In the present invention, the red bricks, waste tiles, and waste ceramics discarded are used, so that once the solids are calcined, the strength is high, and there is little or no shrinkage during the remixed firing. This is due to the high water permeability and water repellent. Furthermore, red bricks, tiles, and ceramics are manufactured primarily through raw material refining or raw material mixing, so there is no need to go through the process of sorting raw material or in some cases, such as when using branched clay. There is an advantage.

In addition, the fine powder is superior to clay in its plasticity and sinterability, and the glaze contained in them has fluidity even at low temperature to prevent deformation during firing and to reinforce the strength of the manufactured brick after firing. .

Referring to the manufacturing method of the water-permeable brick of the present invention in detail according to the process drawing is as follows.

Process chart

Aggregate crushing: Raw materials such as used red brick waste tiles and waste pottery are crushed with JAW CRUSHER or IMPACT CRUSHER, and then aggregate is crushed through ROLL CRUSHER. This pulverization twice is for increasing the content of the fine particles.

Sorting: The pulverized aggregate is sorted with a vibrating net, and 0.5 mm to 5 mm is collected as aggregate, and finely divided particles of 0.5 mm or less are collected separately so that they can be used as clay.

Aggregate: Selected storage of discarded red bricks, waste ceramics, etc., which are ground to 0.5 mm to 5 mm.

Mixing I: After mixing 8-15% by weight of the organic binder (Binder) in the form of an aqueous solution to the aggregate, and stirred and mixed. This mixing is to ensure that the finely divided particles evenly adhere to the aggregate surface in the next step (mixing II), and the organic binder had the best strength of 1% to 3% CMC aqueous solution.

Mixing II: Add about 8 to 20% of the fine particle pulverization in the weight ratio to the aggregate mixed with the organic binder aqueous solution, and mix for 5 minutes with a bladed mixer.

First Molding: A mixture of aggregate and fine particle pulverized mixture is poured into a mold, and the mold is first shaken by applying a pressure of 1.5㎏ / ㎠ or more while vibrating the mold. In this case, however, the thickness of the molding should be 4mm to 10mm thinner than the rated specification for the ceramic concrete layer to be added in the next step of the brick (secondary pressing).

Ceramic sphere mixture: A ceramic sphere having a particle diameter of 0.5 to 3 millimeters is added to the ceramic sphere in a weight ratio of 3% to 5% of an organic binder solution, and the same weight of glaze and water glass (Water Glass) Add an aqueous solution and mix thoroughly.

The organic binder aqueous solution used is an aqueous solution of 1% to 3% of PVA or CMC, and the aqueous solution of glaze and water glass is an aqueous solution of 2.5% to 3.5% in terms of anhydrous glass. In this case, the ceramic sphere mixture used had a higher strength with a higher ratio of spheres having a smaller particle diameter.

Second press molding: The first press molding is placed on the mold to make ceramic sphere layer of 4 to 10 millimeters thick on it, and the mixture of ceramic spheres is poured and vibrated under pressure of 1.5㎏ / ㎠ Molding ensures that the thickness of the final molding conforms to the normal specification of the brick. However, in order to increase the adhesive strength of the upper and lower, it may be prepared by the method of vibration pressing in the secondary press molding after pulverizing the lower raw material by vibration only without applying pressure during the primary molding.

Drying: The permeable brick has a large pore structure and is easy to dry, and it is generally effective to air dry at a temperature of 50 ° C to 150 ° C.

Firing: The water-permeable ceramic brick of the present invention is produced by baking the completely dried in this manner at 1000 ° C to 1100 ° C for 2 hours to 2 hours. However, if higher strength of the permeable brick is required, it can be fired over the same time at 1100 ° C to 1250 ° C.

Comparative tests of bricks prepared with ceramic layers formed with ceramic layers prepared by the method of the present invention using coarse clay (branch or riverside clay) under the same conditions showed that there was a difference in strength as follows. It was.

Permeability bricks produced by the method of the present invention is only 8% to 20% of the amount of particulate pulverization acting as clay compared to the method using the clay, so that the permeability can be saved because the permeability is doubled, and also included in the particulate pulverization The glaze increased the cohesiveness, and a lot of raw materials with low fire resistance were added, so that a permeable brick of excellent strength as shown above was obtained even by firing at a temperature lower than that of clay, that is, 1000 to 1100 ° C. In addition, when giving a different color from the red brick to the fine particle pulverization used in the manufacturing method of the present invention, a small amount of a coloring agent or a coloring chemical may be added to give a color.

Claims (2)

Shredded red bricks, waste tiles, waste ceramics, etc. are shredded to a size of 0.5mm to 5mm, and aggregates are added, and 8% to 20% of fine powder of 0.5mm or less is added to the waste, and the weight ratio is 8 The brick body is formed by mixing and stirring the organic binder (Binder) of -15%, and a mixture layer of ceramic spheres, organic binder and water glass having a size of 0.5 millimeters to 3 millimeters is formed on one surface of the main body, and 1000 to 1250. A method for producing a water-permeable brick produced by baking at 2 ° C. for 2 hours and 2 hours. The water-permeable brick manufactured by the manufacturing method of claim 1.