CN102584176B - Method for preparing ceramic wall and floor tile by utilizing construction waste - Google Patents

Abstract

The invention discloses a method for preparing a ceramic wall and floor tile by utilizing construction waste. The wall and floor tile is lower than 3.0 percent in water absorption and is higher than 15MPa in compression strength. According to the method for preparing the ceramic wall and floor tile by utilizing the construction waste, a ceramic glazed tile, a light tile (including a light insulating tile), an ultra-thin tile, a polished tile and the like can be directly prepared by taking the construction waste as a raw material by utilizing a traditional ceramic interior and exterior wall tile or floor tile production line. By adopting the technology provided by the invention, the utilization ratio of the construction waste is high, the water absorption of the wall and floor tile is low, the antifouling property is good, the strength is high and industrialization popularization is easy.

Description

A method of using construction waste to prepare ceramic wall and floor tiles

technical field

The invention relates to the field of resource utilization of construction waste, in particular to a method for preparing ceramic interior and exterior wall tiles and floor tiles with low water absorption, good antifouling performance and high strength by using construction waste, that is, construction waste.

Background technique

With the development of economy and urbanization, the speed of renovation and demolition of old buildings, construction of new buildings and infrastructure construction is also accelerating. According to statistics, my country demolishes 400 million square meters of old buildings every year, generating about 500 million tons of construction waste; 2 billion square meters of new buildings are built every year, generating more than 100 million tons of construction waste; 40 million tons of garbage. At present, the annual discharge of construction waste in my country has exceeded 640 million tons.

If such a large amount of construction waste is directly buried without proper treatment, it will not only pollute water and soil resources and the air environment, occupy land, but also waste my country's precious mineral resources and seriously hinder the sustainable development of my country's industry. Therefore, the resource utilization of construction waste has become the dream goal of the government and related industries and scientific and technological workers.

Up to now, the reports on resource utilization of construction waste include: "Method for making building materials with construction waste residue" (CN. 02121552.9), "A wall and floor brick produced from construction waste" (CN. and its manufacturing method" (CN.200510011401.8), "a non-fired porous insulation brick" (CN.200710024410.X), "building materials produced from construction waste and its preparation method" (CN.200810216033.4), "using phosphogypsum A method for solidifying construction waste to produce burn-free bricks" (CN.201010230572.0), a "method for producing cement products by reusing construction waste" (CN.201110132550.5), etc. However, these technologies use cement or phosphogypsum as a binder, and prepare blocks, road bricks, square bricks, mortar, cement admixtures, etc. through curing (burn-free). Because these bricks have not been fired, a large amount of cement or phosphogypsum is used to solidify them, the product has high water absorption (poor antifouling performance) and low strength, so it cannot be applied to interior and exterior wall tiles and floor tiles (in a strict sense, they are None of them are ceramics), and can only be used for low value-added blocks, road bricks, square bricks and mortar, cement admixtures, etc., and the utilization rate of construction waste is low.

In addition, some reports about using construction waste as raw materials to burn into bricks include: "A method for producing new building materials using construction waste and industrial waste residue" (CN.200310110163.7), "Coal gangue and construction waste hollow ceramic insulation board and its production method” (CN. 201010507514.8), etc. Although they have been fired, the products still have high water absorption (poor antifouling performance) and low strength, and cannot be applied to interior and exterior wall and floor tiles, and construction waste is used rate is also low (the latter can reach up to 30%).

The existing technology has problems such as low utilization rate of construction waste, high water absorption rate of the product (poor antifouling performance), low strength, and low added value. Requirements for resource utilization of discharged construction waste. Therefore, using construction waste as raw material, it is of great social and economic significance to develop a ceramic interior and exterior wall tile and floor tile preparation technology with high construction waste utilization rate, low product water absorption, good antifouling performance, and high strength.

Contents of the invention

The object of the present invention is to overcome the shortcomings in the above-mentioned prior art and provide a preparation technology for ceramic interior and exterior wall tiles and floor tiles with high utilization rate of construction waste, low water absorption, good antifouling performance and high strength.

The purpose of the present invention is achieved through the following technical solutions:

The ceramic interior and exterior wall tiles and floor tiles prepared from construction waste have a water absorption rate of less than 3.0% and a compressive strength greater than 15MPa.

The preparation method of ceramic wall and floor tile of the present invention comprises the following steps:

(1) In terms of parts by mass, weigh 10-100 parts of construction waste powder, 0-90 parts of ceramic clay, 0-10 parts of quartz, 0-15 parts of feldspar, and 0-90 parts of ceramic waste; Mixing, making uniform powder after ball milling or stirring or spray granulation.

(2) Form the above powder into a body of wall and floor tiles.

(3) Fire the above green body at 900-1260°C for 3-420 minutes to produce ceramic wall and floor tiles with low water absorption (good antifouling performance) and high strength.

Compared with the prior art, the advantages and beneficial effects of the present invention include: high utilization rate of construction waste, low water absorption (good antifouling performance), high strength, and all performance indicators meet the relevant standards for ceramic wall and floor tiles, Moreover, the existing ceramic wall and floor tile production lines can be directly used for production, which is easy for industrialization promotion.

Detailed ways

Below in conjunction with embodiment, the present invention is described in further detail:

Example 1

(1) In terms of parts by mass, weigh 10 parts of construction waste powder, 90 parts of ceramic clay, 2 parts of quartz, and 5 parts of feldspar; mix the above raw materials, add 100 parts of water, and after ball milling and spray granulation, pass 30 mesh sieve to obtain uniform powder.

(2) Press the above powder under 100MPa to make a floor tile body.

(3) The above green body was fired at 1080° C. for 30 minutes.

After firing, the water absorption rate of the sample is 0.5%, the compressive strength is 53MPa, and the bulk density is 2420kg/m ³ , which is suitable for ceramic floor tiles of buildings.

Example 2

(1) In terms of parts by mass, weigh 100 parts of construction waste powder, 10 parts of quartz, and 90 parts of ceramic waste; mix the above raw materials, and pass through an 80-mesh sieve after stirring to obtain a uniform powder.

(2) The above-mentioned powder is pressed under 10MPa to form an exterior wall brick body.

(3) The above green body was fired at 1260° C. for 3 minutes.

After firing, the water absorption rate of the sample is 0.9%, the compressive strength is 36MPa, the bulk density is 870kg/m ³ , and the thermal conductivity is 0.24w/mk. It is suitable for building energy-saving (light-weight heat insulation) ceramic exterior wall bricks.

Example 3

(1) In terms of parts by mass, weigh 50 parts of construction waste powder, 50 parts of ceramic clay, and 15 parts of feldspar; mix the above raw materials, add 50 parts of water, and pass through a 30-mesh sieve after ball milling and spray granulation. A homogeneous powder was obtained.

(2) Press the above-mentioned powder under 200MPa to make an interior wall brick body.

(3) The above green body was fired at 900° C. for 420 minutes.

After firing, the water absorption rate of the sample is 3.0%, the compressive strength is 15MPa, the bulk density is 1580kg/m ³ , and the thermal conductivity is 0.76w/mk. It is suitable for ceramic interior wall tiles of buildings.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (5)

1. A ceramic wall and floor tile utilizing construction waste to prepare, characterized in that, the water absorption rate of said wall and floor tile is 0.5%-3.0%, and the compressive strength is 15-36MPa, and is obtained by the following method: (1) In terms of parts by mass, weigh 10-50 parts of construction waste powder, 50-90 parts of ceramic clay, 0-2 parts of quartz, and 5-15 parts of feldspar, mix the above raw materials, and ball mill or stir or Uniform powder is obtained after spray granulation; (2) Form the above powder into a body of wall and floor tiles; (3) Fire the above body at 900-1260°C for 30-420 minutes to produce ceramic wall and floor tiles with low water absorption and high strength. 2. the preparation method of wall and floor tile described in claim 1, is characterized in that, comprises the following steps: (1) Mix construction waste powder, ceramic clay, quartz, feldspar, and make uniform powder after ball milling, stirring or spray granulation; (2) Form the above powder into a body of wall and floor tiles; (3) Fire the above body at 900-1260°C for 30-420 minutes to produce ceramic wall and floor tiles with low water absorption and high strength. 3. preparation method according to claim 2 is characterized in that, described ball mill is dry method ball mill or wet method ball mill; Described stirring is dry method agitation or wet method agitation; Described wet method ball mill or wet method agitation The amount of water added is 10-100 parts. 4. The preparation method according to claim 2, characterized in that, the molding is powder compression molding or extrusion molding, grouting molding, or injection molding. 5. The preparation method according to claim 2, wherein the ceramic wall and floor tiles are ceramic interior wall tiles, ceramic exterior wall tiles and ceramic floor tiles.