TWI670155B - Sintered brick - Google Patents

Abstract

A brick raw material comprising waste, and the waste comprises waste glass and sludge ash. The amount of the waste glass ranges from 40% by weight or more to less than 100% by weight based on the total amount of the raw material for the brick, and the amount of the sludge ash is more than 0% by weight to 60% by weight or less. The invention provides a sintered brick which is formed by sintering a raw material for the brick, and has a compressive strength range of more than 15 MPa and a water absorption range of less than 15%.

Description

Sintered brick

The present invention relates to a building component, and more particularly to a sintered brick.

General business waste, such as ash (such as fly ash or bottom slag), waste glass, and toxic waste after heat treatment and incineration of waste sludge, is often disposed of by landfill because it has no reuse value. However, the burying method has problems such as high landfill cost, difficult site search, waste of land resources, and secondary pollution to the environment. Therefore, how to effectively reuse business waste, especially the ash formed by heat treatment of waste sludge, has become a topic that has been widely studied.

Accordingly, it is an object of the present invention to provide a raw material for bricks.

Thus, the raw material for brick of the present invention contains waste. The waste includes waste glass and sludge ash, and the amount of the waste glass ranges from 40% by weight or more to less than 100% by weight based on the total amount of the raw materials for the brick, and the amount of the sludge ash is It is more than 0 wt% to 60 wt% or less.

Another object of the present invention is to provide a sintered brick which can be used as an environmentally friendly green building material and which complies with the provisions of the Republic of China standard CNS382.

Therefore, the sintered brick of the present invention is formed by sintering a brick raw material, and has a compressive strength range of more than 15 MPa and a water absorption range of less than 15%, wherein the brick raw material contains waste, and the waste includes waste glass. And sludge sludge ash, and the amount of the waste glass ranges from 40% by weight or more to less than 100% by weight based on the total amount of the raw materials for the brick, and the amount of the sludge ash is more than 0% by weight to 60wt %the following.

The effect of the present invention is that by using the sludge ash as a raw material for forming a sintered brick, it is possible to reduce the secondary pollution of the sludge ash to the environment, and to regain the utilization value of the sludge ash. In addition, after the sintering process is controlled by the ratio of the components in the waste and the sintering treatment, the formed sintered brick can meet the requirements of the Republic of China standard CNS382, and the sintered brick is formed by using waste, and thus can be used as an environmentally friendly type. Green building materials.

The contents of the present invention will be described in detail below.

<Brick materials>

[waste glass]

Preferably, the amount of the waste glass ranges from 40% by weight to 50% by weight based on 100% by weight of the total of the raw materials for the brick. The waste glass is from a glass recycling plant. The physical form of the waste glass may be in the form of powder or chips. The waste glass can be used as it is, or it can be used after pretreatment. The pre-processing includes a drying process and utilizes #100 Screen screening process. Alternatively, the waste glass is dried and used before being used as a raw material for bricks.

[sludge ash]

The sludge ash refers to ash (such as fly ash or bottom slag) formed by heat treatment (for example, incineration) of waste sludge. Preferably, the amount of the sludge ash is in the range of more than 0% by weight to 50% by weight or less based on 100% by weight of the total of the raw materials for the brick. The waste sludge comes from a sludge treatment plant. The waste sludge is, for example, but not limited to, organic sludge or inorganic sludge. The organic sludge is, for example, a biological sludge produced by a biological treatment program or a sludge containing a volatile (VS) solid content of more than 30%. The inorganic sludge is, for example, a chemical sludge produced by a physical or chemical treatment process, or a sludge containing a volatile (VS) solid content of less than 30%. The sludge ash can be used as it is, or it can be used after pretreatment. The pre-processing includes a drying program, a first screening program, a fragmentation program, a grinding program, and a second screening program. The purpose of this first screening procedure is to remove debris. This second screening procedure was performed using a #100 screen. Alternatively, the sludge ash is dried and used before being used as a raw material for bricks.

The raw material for bricks of the present invention further comprises clay.

[clay]

Preferably, the amount of the clay ranges from more than 0% by weight to less than 20% by weight based on 100% by weight of the total of the raw materials for the brick. More preferably, the amount of the clay ranges from 10% by weight to 20% by weight based on 100% by weight of the total of the raw materials for the brick. The clay is from the biography Brick and Kiln Factory. The clay can be used directly or after pre-treatment. The pre-processing includes a drying program, a first screening program, a fragmentation program, a grinding program, and a second screening program. The purpose of this first screening procedure is to remove debris. This second screening procedure was performed using a #100 screen. Alternatively, the clay is dried and used before being used as a raw material for bricks.

<sintered brick>

The sintered brick of the present invention is formed by sintering the raw material for brick described above. The temperature and time of the sintering treatment are adjusted in accordance with the raw material for the sintered brick. The sintering treatment has a temperature in the range of 900 ° C to 1000 ° C. The time of the sintering treatment (including the time of temperature rise, temperature hold, and temperature drop) ranges from 55 hours to 60 hours.

Before the sintering treatment, the soil conservation treatment, the exhaust treatment, the molding treatment, the shaping treatment, the mold release treatment, or the drying treatment can be selectively performed. The soil-removing treatment, the exhaust treatment, the forming treatment, the shaping treatment, the mold release treatment, and the drying treatment can be performed by the conventional soil forming treatment, the exhaust treatment, the forming treatment, the shaping treatment, the mold release treatment, and the drying treatment. condition.

The sintered brick of the present invention can be applied to fields such as construction, civil engineering, and gardening.

The invention will be further illustrated by the following examples, but it should be understood that these examples are for illustrative purposes only and should not be construed as limit.

Example 1 Raw materials for bricks and sintered bricks

The waste is provided, and the waste includes 50% by weight of waste glass and 50% by weight of sludge ash, wherein the sludge ash is obtained by placing the waste sludge in a furnace at 850 ° C to 950 ° C for 4 hours of combustion. The bottom slag was treated and taken out under the furnace of the furnace, and the waste glass and the sludge ash were screened using a #100 sieve.

The waste glass, the sludge ash, and water are mixed to form a brick raw material, wherein the amount of the water is 0.3 times the amount of the waste.

The brick material is placed in a mold having a length of 20 cm, a width of 10 cm, and a height of 5 cm, and is sequentially subjected to exhaust treatment, soil conservation treatment, forming treatment, shaping treatment, mold release treatment, and drying treatment. And sintering treatment. In the exhaust treatment, the brick raw material is divided into several equal parts, and placed in the mold in batches, and each batch is tamped with a crucible bar to discharge air, and the components in the brick raw material are used. Can be stacked tightly. In the soil-removing treatment, the brick raw material is sealed and allowed to stand for 24 hours so that the components in the brick raw material are uniformly and sufficiently absorbed to increase the viscosity. In the forming process, the mold was pressurized at a pressure of 4 MPa. In the shaping treatment, the brick raw material protruding outside the mold is scraped off so that the formed brick can have a flat surface. In the demolding process, the mold is removed to form a brick. In the drying treatment, it was dried by air drying for 48 hours, and then dried in an oven at 70 ° C for 24 hours. In the sintering treatment, the temperature is raised from room temperature to 1,000 ° C at a heating rate of 35.7 ° C per hour. The charge was 28 hours, then, the temperature was kept at 1 hour, and then the temperature was lowered from 1,000 ° C to room temperature at a cooling rate of 35.7 ° C per hour for a total of 28 hours to form a length of 20 cm, a width of 10 cm and a height of 5 Divided bricks.

Example 2 and Comparative Examples 1 to 5

Example 2 and Comparative Examples 1 to 5 were carried out in the same manner as in Example 1, except that the ratio of each component in the raw material for bricks was as shown in Table 1, wherein the clay was sieved using #100 mesh. .

Evaluation project

Compressive strength measurement: In order to clearly understand the measurement process, the following description was made with the sintered brick of Example 1 and measured according to the specifications of CNS 382, and the sintered bricks of Example 2 and Comparative Examples 1 to 5 were also in the same manner. get on. Three sintered bricks of Example 1 were provided, and each of the sintered bricks was vertically cut into half bricks in the longitudinal direction of each of the sintered bricks by using a rock cutter to obtain three samples. Sample to be tested. The length and width of the sample to be tested were measured to determine the area A (unit: mm ² ) of the pressure receiving surface. Then, a thick paper sheet is placed on the pressure receiving surface, and the thickness of the thick paper sheet is such that when the thick paper sheet is placed on the pressure receiving surface, the top surface of the thick paper sheet is not affected by the unevenness of the pressure receiving surface. It is able to keep its top surface flat and then placed on a measuring platform of a compression testing machine (label: Hung Ta; model: HT-9501). The sample to be tested was pressurized at a load rate of 0.5 MPa per second, and pressurized until the sample was destroyed, and then the maximum value W (unit: N) of the load was recorded. The compressive strength (MPa) of each sample to be tested was W/A, and the compressive strength of the sample to be tested was summed and the average value (average compressive strength) was calculated.

Water absorption measurement: In order to clearly understand the measurement process, the following description was made with the sintered brick of Example 1 and measured according to the specifications of CNS 382, and the sintered bricks of Example 2 and Comparative Examples 1 to 5 were also carried out in the same manner. . The weight m1 of the three sintered bricks of Example 1 was measured using an electronic scale, and then immersed in clear water at a temperature of about 25 ° C for 24 hours, and then taken out and wiped with excess water on the surface with a damp cloth. And again using the electronic scale, measuring the weight m2 of the sintered bricks after soaking for 24 hours. The water absorption rate (%) of each of the sintered bricks of Example 1 was [(m2-m1)/m1] × 100%, and the absorption rates of the sintered bricks were aggregated and the average value (average water absorption rate) was calculated. .

In summary, the present invention can reduce the environmental pollution caused by the sludge ash by using the sludge ash as a raw material for forming the sintered brick, and the sludge ash can be reused. In addition, after the ratio of the components in the waste is controlled and subjected to the sintering treatment, the formed sintered brick can meet the requirements of the Republic of China standard CNS382, and the sintered brick is formed by using waste and the total amount of the waste is 40 wt% to 100 wt% can be used as an environmentally-friendly green building material, and the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the simple equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still Within the scope of the invention patent.

Claims (5)

A sintered brick is formed by sintering a brick raw material, and has a compressive strength range of more than 15 MPa and a water absorption range of less than 15%, wherein the brick raw material comprises waste, and the waste includes waste glass and sewage The sludge ash, and the amount of the waste glass ranges from 40% by weight or more to less than 100% by weight based on the total amount of the raw materials for the brick, and the amount of the sludge ash is more than 0% by weight to 60% by weight or less . The sintered brick according to claim 1, wherein the raw material for the brick further comprises clay. The sintered brick according to claim 2, wherein the amount of the clay ranges from more than 0% by weight to 20% by weight based on 100% by weight of the total of the raw materials for the brick. The sintered brick according to claim 3, wherein the amount of the clay ranges from 10% by weight to 20% by weight based on 100% by weight of the total of the raw materials for the brick. The sintered brick according to claim 4, wherein the amount of the waste glass ranges from 40% by weight to 50% by weight based on 100% by weight of the total of the raw materials for the brick.