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A kind of straw composite building material and its preparation method

A technology for composite building materials and straw, applied in the field of building materials, can solve the problems of low strength, poor frost resistance, and small straw content, and achieve the effects of improving thermal insulation performance, excellent thermal insulation performance, and large dosage.

Active Publication Date: 2019-06-25
JILIN JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a straw composite building material, which solves technical problems such as low strength of straw cement-based composite materials, poor frost resistance, and small straw content.

Method used

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  • A kind of straw composite building material and its preparation method
  • A kind of straw composite building material and its preparation method
  • A kind of straw composite building material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Take the corn stalks and crush them to 1-20mm filaments and fully dry them. After drying, carry out carbonization treatment in a vacuum state: carbonize under constant pressure nitrogen protection for 10 minutes, and the carbonization temperature is 200°C. Take out the stalks and wait until they drop to room temperature and seal them for later use. ;

[0025] 2) Take 50kg of sodium hydroxide and 30kg of sodium hydroxide as the alkali component materials, mix and stir evenly for use;

[0026] 3) Weigh 40 kg of slag, 10 kg of fly ash, 10 kg of alkali component, 4 kg of surface carbonized straw, 2 kg of silica fume, 2 kg of calcined diatomite, 1 kg of cement clinker, 25 kg of water and step 1) 2 kg of carbonized corn stalks on the surface of the mixture, and stir evenly after mixing;

[0027] 4) Mix the raw materials in step 1) and step 3) and perform mechanical stirring, run at low speed and slowly add 10kg of the alkali component solution in step 2) for mixing, stir ...

Embodiment 2

[0029] 1) Take the corn stalks and crush them to 1-20mm filaments and fully dry them. After drying, carry out carbonization treatment in a vacuum state: carbonize under constant pressure nitrogen protection for 20 minutes, and the carbonization temperature is 250°C. Take out the stalks and wait until they drop to room temperature and seal them for later use. ;

[0030] 2) Weigh 60kg of alkali component material water glass and 40kg of sodium hydroxide, mix and stir evenly for later use;

[0031] 3) Weigh 55 kg of slag, 20 kg of fly ash, 15 kg of alkali component, 10 kg of surface carbonized straw, 8 kg of silica fume, 4 kg of calcined diatomite, 3 kg of cement clinker, 40 kg of water and the surface carbonization of step 1) Corn stalks 10kg, mixed and stirred evenly;

[0032] 4) Mix the raw materials in step 1) and step 3) and then mechanically stir, run at low speed and slowly add the alkali component solution in step 2) for mixing, stir at a low speed of 60±2r / min for 90 se...

Embodiment 3

[0034] 1) Take the corn stalks and crush them to 1-20mm filaments and fully dry them. After drying, carry out carbonization treatment in a vacuum state: carbonize under constant pressure nitrogen protection for 25 minutes, and the carbonization temperature is 300°C. Take out the stalks and wait until they drop to room temperature and seal them for later use. ;

[0035] 2) Weigh 65kg of alkali component material water glass and 45kg of sodium hydroxide, mix and stir evenly for use;

[0036] 3) Weigh 60 kg of slag, 25 kg of fly ash, 20 kg of alkali component, 15 kg of carbonized straw on the surface, 10 kg of silica fume, 8 kg of calcined diatomite, 4 kg of cement clinker, 45 kg of water and the surface of step 1). 20kg of carbonized corn stalks, mixed and stirred evenly;

[0037] 4) Mix the raw materials in step 1) and step 3) and then mechanically stir, run at low speed and slowly add 20kg of the alkali component solution in step 2) for mixing, stir at a low speed of 60±2r / mi...

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Abstract

The invention discloses a straw compounded building material and a preparation method thereof provides a novel compound building material and a preparation method thereof. The surface properties of straw can be effectively improved, and accordingly the problem that the straw and a cement base material are difficult to bond. In addition, the novel compound straw material is a green and environment-friendly resource which are rich and cheap in composition and ingredient selection, and the novel compound material having the strength properties including compression resistance, fracture resistance and freezing resistance and having very excellent thermal insulation properties can be obtained.

Description

Technical field: [0001] The invention discloses a straw composite building material and a preparation method thereof, relates to a novel straw cement-based composite material and a novel method for modifying the surface of corn straw, and belongs to the technical field of building materials. Background technique: [0002] The main component of corn stalks is cellulose, etc. When the straw husk is mixed into the cement-based material, the cellulose is decomposed into monosaccharides when it encounters an alkaline solution, and the sugars contain many -OH functional groups. 2+ At the same time, the hydroxyl group is easy to associate with water molecules through hydrogen bonds, so that a layer of solvated water film is formed on the surface of cement particles, which hinders the hydration process, which will lead to the strength of cementitious materials especially Severe loss of early strength. In addition, the appearance of straw skin obtained by scanning electron microscop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B20/02C04B111/20
CPCC04B20/023C04B28/04C04B2111/20C04B2201/32C04B2201/50C04B18/141C04B18/08C04B12/04C04B22/062C04B18/248C04B18/146C04B14/08
Inventor 肖力光李静瑶刘喜旭李诺
Owner JILIN JIANZHU UNIVERSITY
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