Method for preparing splitting tiles by using Tai lake silt
A silt and drying technology, applied in the field of making split bricks by using Taihu silt, can solve the problems of poor mechanical properties, secondary pollution, soil damage, etc., and achieve excellent flexural strength, good erosion resistance, and avoid secondary pollution. Effect
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Embodiment 1
[0018] 1. Ingredients are made according to the following weight percentages: 1. Taihu Lake silt 35% (moisture content 35%), feldspar 33% (average particle size 30mm), kaolin 23%, quartz 4%, mica 2%, water 6%, Interface agent 2%.
[0019] 2. Dry and pulverize the Taihu Lake silt into fine granules first, when the water content reaches 35%, then mix it with the above materials evenly and then through vacuum extrusion, use an extruder to preform under the pressure of 20MPa, and the molding time is 2 Second.
[0020] 3. After the extruded bricks are placed under natural conditions for 3 hours, they are dried in a drying room at a temperature of 110°C for 5 hours, and then fired in a kiln for 9 hours at a temperature of 1120°C. The kiln yields the finished split brick. The average shrinkage rate is 4.1~4.5%, the average flexural strength is 26.7~28.9MPa, the average compressive strength is 18.7MPa, the frost resistance is -30~+30c, the color difference is less than 0.2, the seis...
Embodiment 2
[0022] 1. Ingredients are made according to the following weight percentages: 1. Taihu Lake silt 30% (moisture content 28%), feldspar 35% (average particle size 25mm), kaolin 17%, quartz 5%, mica 3%, water 7%, Interface agent 3%.
[0023] 2. Dry and crush Taihu Lake silt into fine particles first, so that the moisture content reaches 28%, then mix with the above materials evenly and then through vacuum extrusion, use an extruder to preform under the pressure of 13MPa, and the molding time is 3 Second.
[0024] 3. After the extruded bricks are placed under natural conditions for 2 hours, they are dried in a drying room at a temperature of 113°C for 4 hours, and then fired in a kiln for 8 hours at a temperature of 1140°C. The kiln yields the finished split brick. The average shrinkage rate is 3.9~4.5%, the average flexural strength is 23.4~24.5MPa, the average compressive strength is 19.8.MPa, the frost resistance is -29~+29c, the color difference is less than 0.15, the seismi...
Embodiment 3
[0026] 1. Ingredients are made according to the following weight percentages: 1. Taihu Lake silt 25% (moisture content 30%), feldspar 40% (average particle size 23mm), kaolin 20%, quartz 4%, mica 5%, water 5%, Binder 1%.
[0027] 2. Dry and pulverize Taihu Lake silt into fine granules first, when the moisture content reaches 30%, then mix with the above materials evenly and then through vacuum extrusion, use extruder to preform under 16MPa pressure condition, and the molding time is 4 Second.
[0028] 3. After the extruded bricks are placed under natural conditions for 1 hour, they are dried in a drying room at a temperature of 115°C for 4.5 hours, and then fired in a kiln for 7 hours at a temperature of 1160°C. The kiln yields the finished split brick. The average shrinkage rate is 4.3~4.5%, the average flexural strength is 23.3~25.5MPa, the average compressive strength is 18.MPa, the frost resistance is -31~+31c, the color difference is less than 0.16, the seismic intensit...
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