Riverway sludge self-heat preserving sintering porous brick and production method thereof

Abstract

The invention relates to a heat-insulating wall body material for a building, and discloses a riverway sludge self heat-insulating sintered porous brick and preparation thereof. The riverway sludge self heat-insulating sintered porous brick comprises the following raw materials in percentage by mass: 30 to 50 percent of riverway sludge, 20 to 40 percent of riverway sludge dry powder, 20 to 30 percent of cinder and 1 to 8 percent of microporous forming materials. The riverway sludge self heat-insulating sintered porous brick has superior self heat-insulating property, and can realize building energy conservation by more than 50 percent in the aspect of enclosure of a common building structure.

Description

technical field

[0001] The invention relates to a thermal insulation wall material for building, in particular to a self-insulation sintered porous brick produced by utilizing river mud and a preparation method thereof. Background technique

[0002] River silt is one of the important types of municipal solid waste. Due to the direct discharge of sewage for many years in urban rivers, a large amount of inorganic and organic substances have accumulated in the river mud, which has become a secondary pollution source through diffusion and exchange with the overlying water body. The dredging of waterways, rivers, lakes and other densely covered water networks in my country will produce a lot of silt, and with the planning and upgrading of Shanghai's river channels, more river silt will be produced. How to effectively, adapt measures to local conditions, and recycle river silt is of great significance to avoid secondary pollution, recycle resources, and suggest a conservation-ori...

Examples

Embodiment 1

[0025] The river silt sintered porous brick is made by mixing river silt, river silt dry powder, cinder, and microporous forming agent, making billets, drying and firing. The mass ratio of river silt, river silt dry powder, coal slag, and wood chip microporous forming agent is 50%: 29%: 20%: 1%. The preparation process is as figure 1 As shown, mix the aged and dried river silt, cinder, and sawdust, add appropriate amount of water, fully stir, roll, and vacuum-extrude the adobe. The rectangular through holes on the adobe are longitudinally arranged in an orderly manner. The through-holes in adjacent columns are staggered from each other, and the width of the hole is about 15mm; the thickness of the hole wall is 15mm. After sintering at a high temperature of 950°C, a 90×115×240mm self-insulating sintered brick is made, and its thermal conductivity is 0.28W / (m K), and the heat transfer coefficient of a 240mm wall made of self-insulating bricks is 1.34W / (m 2 · K).

Embodiment 2

[0027] The river silt sintered porous brick is made by mixing river silt, river silt dry powder, cinder, and microporous forming agent, making billets, drying and firing. The mass ratio of river silt, river silt dry powder, coal slag, and straw microporous forming agent is 50%: 28%: 20%: 2%. Mix the aged and dried river silt, cinder, and microporous forming agent, add appropriate amount of water, fully stir, roll, and vacuum-extrude the adobe. The rectangular through holes on the adobe are longitudinally and orderly arranged. Adjacent through-holes are staggered from each other, with a width of about 22mm and a wall thickness of 15mm. After sintering at a high temperature of 1000°C, a 90×115×240mm self-insulating sintered brick is made, and its thermal conductivity is 0.24W / (m K), and the heat transfer coefficient of a 240mm wall made of self-insulating bricks is 1.01W / (m 2 · K).

Embodiment example 3

[0029] The river silt sintered porous brick is made by mixing river silt, river silt dry powder, cinder and microporous forming agent, making billets, drying and firing, and the mass ratio of river silt, river silt dry powder, coal slag and microporous forming agent is 45 %: 29%: 22%: 4%. Mix the aged and dried river silt, cinder, and microporous forming agent, add appropriate amount of water, fully stir, roll, and vacuum-extrude the adobe. The rectangular through holes on the adobe are longitudinally and orderly arranged. Adjacent through-holes are staggered from each other, and the width of the hole is about 20mm; the thickness of the hole wall is 12mm. Sintered at a high temperature of 1050°C to make 90×115×240mm self-insulating sintered bricks, the thermal conductivity is 0.20W / (m K), and the heat transfer coefficient of a 240mm wall made of self-insulating bricks is 0.85W / (m 2 · K).

technical field

[0001] The invention relates to a thermal insulation wall material for building, in particular to a self-insulation sintered porous brick produced by utilizing river mud and a preparation method thereof. Background technique

[0002] River silt is one of the important types of municipal solid waste. Due to the direct discharge of sewage for many years in urban rivers, a large amount of inorganic and organic substances have accumulated in the river mud, which has become a secondary pollution source through diffusion and exchange with the overlying water body. The dredging of waterways, rivers, lakes and other densely covered water networks in my country will produce a lot of silt, and with the planning and upgrading of Shanghai's river channels, more river silt will be produced. How to effectively, adapt measures to local conditions, and recycle river silt is of great significance to avoid secondary pollution, recycle resources, and suggest a conservation-ori...

Examples

Embodiment 1

[0025] The river silt sintered porous brick is made by mixing river silt, river silt dry powder, cinder, and microporous forming agent, making billets, drying and firing. The mass ratio of river silt, river silt dry powder, coal slag, and wood chip microporous forming agent is 50%: 29%: 20%: 1%. The preparation process is as figure 1 As shown, mix the aged and dried river silt, cinder, and sawdust, add appropriate amount of water, fully stir, roll, and vacuum-extrude the adobe. The rectangular through holes on the adobe are longitudinally arranged in an orderly manner. The through-holes in adjacent columns are staggered from each other, and the width of the hole is about 15mm; the thickness of the hole wall is 15mm. After sintering at a high temperature of 950°C, a 90×115×240mm self-insulating sintered brick is made, and its thermal conductivity is 0.28W / (m K), and the heat transfer coefficient of a 240mm wall made of self-insulating bricks is 1.34W / (m 2 · K).

Embodiment 2

[0027] The river silt sintered porous brick is made by mixing river silt, river silt dry powder, cinder, and microporous forming agent, making billets, drying and firing. The mass ratio of river silt, river silt dry powder, coal slag, and straw microporous forming agent is 50%: 28%: 20%: 2%. Mix the aged and dried river silt, cinder, and microporous forming agent, add appropriate amount of water, fully stir, roll, and vacuum-extrude the adobe. The rectangular through holes on the adobe are longitudinally and orderly arranged. Adjacent through-holes are staggered from each other, with a width of about 22mm and a wall thickness of 15mm. After sintering at a high temperature of 1000°C, a 90×115×240mm self-insulating sintered brick is made, and its thermal conductivity is 0.24W / (m K), and the heat transfer coefficient of a 240mm wall made of self-insulating bricks is 1.01W / (m 2 · K).

Embodiment example 3

[0029] The river silt sintered porous brick is made by mixing river silt, river silt dry powder, cinder and microporous forming agent, making billets, drying and firing, and the mass ratio of river silt, river silt dry powder, coal slag and microporous forming agent is 45 %: 29%: 22%: 4%. Mix the aged and dried river silt, cinder, and microporous forming agent, add appropriate amount of water, fully stir, roll, and vacuum-extrude the adobe. The rectangular through holes on the adobe are longitudinally and orderly arranged. Adjacent through-holes are staggered from each other, and the width of the hole is about 20mm; the thickness of the hole wall is 12mm. Sintered at a high temperature of 1050°C to make 90×115×240mm self-insulating sintered bricks, the thermal conductivity is 0.20W / (m K), and the heat transfer coefficient of a 240mm wall made of self-insulating bricks is 0.85W / (m 2 · K).

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