Preparation method of anti-cracking autoclaved brick
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An autoclaved brick and anti-cracking technology, applied in the field of autoclaved bricks, can solve the problems of poor compressive strength and easy cracking, achieve good compression and crack resistance, not easy to crack or break, and save cultivated land resources
Inactive Publication Date: 2017-12-26
TONGLING FENGZE BUILDING MATERIALS TECH
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At present, the main problems in the production of autoclaved bricks in my country
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Embodiment 1
[0018] A preparation method of an anti-cracking autoclaved brick, comprising the steps of:
[0019] S1. Mix the modified chlorinated polyethylene glycol 400, fly ash, kaolin, and water evenly, add cement, water reducer, and curing agent, mix evenly, and press to form a premix;
[0020] S2. Sending the premix into the autoclaved room for curing to obtain anti-cracking autoclaved bricks.
Embodiment 2
[0022] A preparation method of an anti-cracking autoclaved brick, comprising the steps of:
[0023] S1. Mix 40 parts of modified chlorinated polyethylene glycol 400, 100 parts of fly ash, 20 parts of kaolin, and 20 parts of water in parts by weight, and add 10 parts of cement, 4 parts of water reducer and 1 part of curing agent. Uniform, compression molding, compression pressure is 24MPa, compression time is 4h, obtains premix;
[0024] S2. Send the premixed material into the autoclave room for curing for 20 hours, the steam pressure is 4 MPa, and the steam temperature is 220° C. to obtain anti-cracking autoclaved bricks.
Embodiment 3
[0026] A preparation method of an anti-cracking autoclaved brick, comprising the steps of:
[0027] S1. Mix 60 parts of modified chlorinated polyethylene glycol 400, 80 parts of fly ash, 30 parts of kaolin, and 15 parts of water in parts by weight, and add 20 parts of cement, 2 parts of water reducer and 2 parts of curing agent to mix Uniform, compression molding, compression pressure is 20MPa, compression time is 8h, obtains premix;
[0028] Modified chlorinated polyethylene glycol 400 is prepared by the following process: mix chlorinated polyethylene glycol 400 and oxidized starch, ultrasonically disperse, add sodium hydroxide and sodium lignosulfonate when the temperature rises, stir under nitrogen protection, cool, adjust The pH value of the system is neutral, and modified chlorinated polyethylene glycol 400 is obtained;
[0029] S2. Send the premixed material into the autoclave room for curing for 12 hours, the steam pressure is 6 MPa, and the steam temperature is 200° C...
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Abstract
The invention discloses a preparation method of an anti-cracking autoclaved brick. The preparation method comprises the following steps: evenly mixing modified chlorinated polyethylene glycol 400, fly ash, kaolin, and water, adding cement, a water reducer, and a curing agent, evenly mixing, pressing, moulding to obtain premix; delivering the premix to an autoclaving chamber, and carrying out curing to obtain the anti-cracking autoclaved brick. The modified chlorinated polyethylene glycol 400 is prepared by the following steps: mixing chlorinated polyethylene glycol 400 and oxidized starch, carrying out ultrasonic dispersion, heating, adding sodium hydroxide and sodium lignosulfonate, stirring under the protection of nitrogen gas, cooling, and adjusting the pH of the system to the neutral region to obtain the modified chlorinated polyethylene glycol 400. Fly ash is taken as the raw material to prepare the autoclaved brick, a large amount of cultivated land is saved, the water and air pollution is reduced, and the fly ash is converted into valuable resources and is effectively recovered and used. The manufacturing cost is low, the mould loss is little, the anti-compression strength of the brick is large, the structure is stable, and the brick is hard to break.
Description
technical field [0001] The invention relates to the technical field of autoclaved bricks, in particular to a preparation method of anti-cracking autoclaved bricks. Background technique [0002] With the rapid development of my country's economy, the demand for building bricks has doubled, especially the large number of demolition and construction projects in cities, making the demand for building bricks increasing. The standard bricks currently on the market mainly include clay bricks and shale bricks. Clay bricks are fired from clay, which requires excavation of arable land, resulting in a large loss of arable land resources. Shale bricks are made of shale and coal gangue, and the residual sulfur dioxide in the finished product is harmful to the human body. Therefore, research and development of building materials that can replace clay bricks and shale bricks has become a top priority. At present, autoclaved bricks are better than clay bricks and shale bricks in terms of ...
Claims
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