Manufacturing method of autoclaved fly ash-lime brick

An autoclaved fly ash brick and a manufacturing method technology, applied in the field of building material manufacturing, can solve the problems of many bad bricks, insufficient strength of finished bricks, and insufficient reaction, so as to achieve improved utilization efficiency, high finished product strength, and bad brick rate low effect

Inactive Publication Date: 2014-12-31
陶安庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing manufacturing method for producing autoclaved fly ash bricks improperly controls the reaction temperature, time, pressure, water addition and other parameters, resulting in incomplete reaction, insufficient strength of finished bricks, and many bad bricks , the properties of compressive resistance, flexural resistance and frost resistance are not satisfactory.

Method used

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  • Manufacturing method of autoclaved fly ash-lime brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw materials are: 63% of fly ash, 20% of stone chips, 15% of lime, and 2% of gypsum in percentage by weight. , the amount of water added is 15% of the total weight of fly ash, stone chips, lime and gypsum, and the temperature of the stirring slurry is controlled at 42°C; the mixture is then sent to the digestion bin for digestion, and the mixture passes through 6 The digestion of 1 hour is sent to the wheel mill by the disc feeder located under the digestion bin for adding water and rolling; the amount of water added to the wheel mill is 3% of the total weight of fly ash, stone chips, lime, and gypsum;

[0022] The rolled blank is sent into the hydraulic brick machine to be pressed into adobe, and then put into the autoclave for curing. The autoclaved curing section includes four stages of vacuum, boost, constant pressure and step-down. The constant pressure stage The pressure in the autoclave is 1.1 MPa and the temperature is 180° C., and the depressurization stag...

Embodiment 2

[0024] The raw materials are: 63% of fly ash, 20% of stone chips, 15% of lime, and 2% of gypsum in percentage by weight. , the amount of water added is 10% of the total weight of fly ash, stone chips, lime and gypsum, and the temperature of the stirring slurry is controlled at 38°C; the mixture is then sent to the digestion bin for digestion, and the mixture passes through 5 The digestion of 1 hour is sent to the wheel mill by the disc feeder located under the digestion bin for adding water and rolling; the amount of water added to the wheel mill is 2% of the total weight of fly ash, stone chips, lime, and gypsum;

[0025] The rolled blank is sent into the hydraulic brick machine to be pressed into adobe, and then put into the autoclave for curing. The autoclaved curing section includes four stages of vacuum, boost, constant pressure and step-down. The constant pressure stage The pressure in the autoclave is 0.9 MPa and the temperature is 170° C., and the depressurization stag...

Embodiment 3

[0027] The raw materials are: 63% of fly ash, 20% of stone chips, 15% of lime, and 2% of gypsum in percentage by weight. , the amount of water added is 13% of the total weight of fly ash, stone chips, lime and gypsum, and the temperature of the stirring slurry is controlled at 40°C; the mixture is then sent to the digestion bin for digestion, and the mixture passes through 5.5 The digestion of 1 hour is sent to the wheel mill by the disc feeder arranged under the digestion bin for adding water and rolling; the amount of water added to the wheel mill is 2.5% of the total weight of fly ash, stone chips, lime and gypsum;

[0028] The rolled blank is sent into the hydraulic brick machine to be pressed into adobe, and then put into the autoclave for curing. The autoclaved curing section includes four stages of vacuum, boost, constant pressure and step-down. The constant pressure stage The pressure in the autoclave is 1.0 MPa and the temperature is 175° C., and the depressurization ...

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Abstract

The invention discloses a manufacturing method of an autoclaved fly ash-lime brick. The manufacturing method comprises a blending stirring process, a mixture digestion and rolling process, and a molding and maintaining process. In the blending stirring process, a use amount of water is 10-15% total amount of materials and a temperature is controlled in a range of 38-42 DEG C. In the mixture digestion and rolling process, a use amount of water is 2-3% total amount of the materials. The autoclaving maintaining process comprises vacuum-pumping, pressure increasing, pressure keeping and pressure reduction stages, wherein in the pressure keeping stage, pressure in an autoclave is in a range of 0.9-1.1MPa and a temperature is in a range of 170-180 DEG C. Through optimization of control of times and temperature parameters of various stages in manufacture, the manufacturing method improves raw material utilization efficiency. The autoclaved fly ash-lime brick finished product obtained by the manufacturing method has excellent performances of high strength, a low reject rate, pressure resistance, bending resistance and frost resistance.

Description

technical field [0001] The invention relates to the technical field of manufacturing methods of building materials, in particular to a manufacturing method of autoclaved fly ash bricks. Background technique [0002] The production of autoclaved fly ash bricks began in the early 1960s in my country and developed the fastest and most in the 1970s. Autoclaved fly ash bricks use power plant fly ash, quicklime and deglazed gypsum as the main raw materials, and add a certain amount of cinder or other aggregates. A new type of wall material made after curing. Autoclaved fly ash brick is also a new type of building material that saves energy and makes good use of waste. It saves energy in the production process compared with the production of general building materials. In recent years, my country's wall reform has increased, which has further promoted the production of autoclaved bricks and further improved the quality of autoclaved fly ash bricks. However, the existing manufact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
Inventor 陶安庆
Owner 陶安庆
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