Building bricks sintered from fly ash and red sandstone, and preparation technique

A preparation process and technology of fly ash, applied in the field of building materials, can solve the problems of subsidence, waste of resources, softening of particles, etc., and achieve the effects of improving product quality, strengthening mixing effect, and sufficient hydration reaction

Inactive Publication Date: 2007-05-09
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Red sandstone exists in large quantities in road construction in mountainous areas, but the natural strength of red sandstone is low, and it is easy to disintegrate, break and soften when exposed to water, which can easily cause roadbed water damage, landslides, subsidence and other diseases. It is a bad filling roadbed The material is often treated as spoil, and the strength of red sandstone in mountainous areas varies greatly due to differences in mineral composition and cementing substances. Under the action of atmospheric environment or dry-wet cycle, the rock blocks collapse, the particles soften, and the strength decreases. The nature of the project is very poor, prone to water and soil erosion, resulting in waste of resources

Method used

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  • Building bricks sintered from fly ash and red sandstone, and preparation technique

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Grind the red sandstone, the particle size is 0.080mm square hole sieve and sieve the remaining 5%, then take fly ash, red sandstone and bentonite according to the weight ratio of 50:45:5, put them in the mixer, and stir the dry materials ;

[0020] 2. Take 22 parts by weight of water and pour it into the dry material one after another, and then use a mixer for secondary mixing;

[0021] 3. Aging the mixed mud for 1.5 hours to fully moisten the mud and dry it naturally or in an oven to dry its excess water to increase its plasticity;

[0022] 4. Hand mold the aged mud into adobe of load-bearing bricks;

[0023] 5. Dry the adobe made in an oven at 100°C;

[0024] 6. Sinter the dried adobe at 1080°C for 1.5 hours.

[0025] The compressive strength of the prepared load-bearing brick product is 17.58MPa, and the water absorption rate is 10.23%, meeting the national standard requirement of MU15 in GB / T5101-1998 "Sintered Ordinary Brick".

Embodiment 2

[0027] 1. Grind the red sandstone, the particle size is 0.080mm square hole sieve and sieve the remaining 5%, then take fly ash, red sandstone and kaolin according to the weight ratio of 55:40:5, put them in the mixer, and stir the dry materials ;

[0028] 2. Take 18 parts by weight of water and pour it into the dry material one after another, and then use a mixer for secondary mixing;

[0029] 3. Aging the mixed mud for 2 hours to fully moisten the mud, dry it naturally or dry its excess water in an oven to increase its plasticity;

[0030] 4. Molding the aged mud into adobe of porous brick;

[0031] 5. Dry the adobe made in an oven at 90°C;

[0032] 6. Sinter the dried adobe at 1050°C for 1.5 hours.

[0033] The obtained non-load-bearing brick product has a compressive strength of 13.56MPa and a porosity of 26.25%, meeting the national standard requirements of MU10 in GB13544-2000 "Sintered Porous Brick".

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Abstract

This invention discloses a method for preparing construction bricks by sintering fly ashes and red sandstone. The raw materials comprise: fly ashes, red sandstone, plasticizer (kaolin or bentonite), and water at a weight ratio of (50-60) :( 40-50) :( 1-5) :( 18-30). The fly ashes are the mass fly ashes from fluidized bed furnace and piled on the material field. The red sandstone is from waste roadbed materials or lost natural resources in mountain areas. The construction bricks can be used for bearing or non-bearing inner and outer walls. The method has such advantages as simple process, easy operation, high efficiency, low sintering temperature, low energy consumption, high performance and wide applications.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a building brick prepared by utilizing fly ash and red sandstone and a preparation process thereof. Background technique [0002] my country is the third largest country in the world for fly ash emissions. The annual discharge of fly ash in the power industry exceeds 100 million tons, and the utilization rate is only about 38%. At present, the main raw materials for preparing fly ash sintered bricks are fly ash clay, fly ash shale, fly ash coal gangue, etc., but there is no report on the use of red sandstone to prepare fly ash building bricks. Red sandstone is widely distributed in my country. It is a kind of red, dark red or brown mudstone, sandy mudstone, argillaceous fine sandstone, argillaceous or sandy rock and other sedimentary rocks rich in iron oxides. Red sandstone exists in large quantities in road construction in mountainous areas, but the natur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B33/135C04B33/04
CPCY02P40/60
Inventor 郝成伟吴伯麟杨云涛吴文辉张静雅
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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