CN1830874A - Method for producing steam-pressing silicate products by waste concrete - Google Patents
Method for producing steam-pressing silicate products by waste concrete Download PDFInfo
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- CN1830874A CN1830874A CNA200510053577XA CN200510053577A CN1830874A CN 1830874 A CN1830874 A CN 1830874A CN A200510053577X A CNA200510053577X A CN A200510053577XA CN 200510053577 A CN200510053577 A CN 200510053577A CN 1830874 A CN1830874 A CN 1830874A
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- Prior art keywords
- waste concrete
- silicate products
- pressing
- pressing silicate
- produce steam
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A silicate product (building aerocrete block, hollow building block, brick, or slab) is prepared from waste concrete, lime and selective powdered coal ash, sand and steel slags through crushing and grinding the waste concrete, mixing with others, and shaping under steam pressure.
Description
Technical field
The invention belongs to building material technical field, relating to the waste concrete is main raw material, adopts and steams the method that compression technology is produced steam-pressing silicate products.
Background technology
Along with the development of society, the raising of economic level, urban construction and municipal administration, road construction and maintenance etc. all can produce a large amount of waste concretes.
The traditional processing mode of waste concrete mainly is to topple over and backfill.Abroad the waste concrete that ruining buildings is obtained cleans, and reclaims waste concrete as concrete aggregate by fragmentation.But domestic and international research finds that waste concrete is used in the concrete as the secondary aggregate, concrete density, workability, hardness, ultrasonic wave speed and ultimate compression strength variation.Chinese patent CN1107558C has also announced the recovery method of concrete waste material.
The later stage eighties 20th century plays China and has put into effect a series of policies, rules to limit the production and the use of solid clay brick, encourages to adopt novel wall material energetically.The main raw material(s) that is used to make novel wall material at present has flyash, sand and cement etc., the existing problem that novel wall material ubiquity intensity is lower, drying shrinkage is bigger.Seek new starting material, and improve novel wall material intensity, reduction novel wall material drying shrinkage, the problem that must consider when becoming production and using materials for wall.
Summary of the invention
The purpose of this invention is to provide a kind of method of utilizing waste concrete to produce steam-pressing silicate products.
Technical scheme of the present invention is: with levigate powder to certain fineness after the waste concrete fragmentation, add an amount of lime, produce silicate products such as air-entrained concrete building block, holllow building block and autoclaved brick, sheet material under autoclaved condition.
A kind of method of utilizing waste concrete to produce steam-pressing silicate products is characterized in that: a) the waste concrete piece is crushed to granularity less than 50mm; B) with the waste concrete piece of fragmentation levigate to granularity less than 2mm, form the available twice-laid stuff; C) twice-laid stuff and the lime that described waste concrete is made, and add a certain amount of water, the solid mass ratio of water is 0.25, mixes the back and make steam-pressing silicate products under autoclaved condition.This mixture is adobe or sheet material at the forming under the pressure of 5MPa, and constant temperature steams and pressed 6 hours in the autoclave of the saturated vapor pressure of 1.3MPa, goes out still.
Lime generally accounts for 5～40% of solid total mass, and lime preferably accounts for 5～35% of solid total mass.Flyash, sand powder, slag or slag material partly can also be replaced twice-laid stuff that described waste concrete makes mixes the back make steam-pressing silicate products under autoclaved condition with lime.The replacement amount of flyash, sand powder, slag or slag material is 10～80% of a waste concrete quality, and lime accounts for 5～40% of solid total mass.Lime preferably accounts for 5～35% of solid total mass.
Waste concrete can also be broken into the fragment below the 50mm, levigate then to specific surface area greater than 300m
2The powder of/kg; In levigated waste concrete powder (flyash, sand powder, steel-making slag powder etc. that can mix 10～80% mass ratioes replace the waste concrete powder), the aluminium powder that adds 0.8 ‰ (mass ratioes), (water-solid ratio is 0.50 to add a certain amount of water, mass ratio), stir, add fine grinding quicklime again, stir.Then the mixture that stirs is injected mould, quiet stop 2 hours after, cutting, constant temperature steams and pressed 6 hours in the autoclave of the saturated vapor pressure of 1.3MPa, goes out still.
The present invention adopts as above technical scheme, has effectively utilized solid waste, has avoided the complicated processes with the broken classification use of waste concrete, has avoided the secondary pollution problem in the regeneration process.Adopt the technical program, the present relatively novel wall material of made steam-pressing silicate products has the intensity height, shrinks little characteristics.Waste concrete regeneration method required equipment of the present invention is simple, and economic benefit and social benefit are obvious, help alleviating carrying capacity of environment simultaneously, the protection environment.
Specific embodiments
Embodiment one:
Step 1 is broken into fragment below the 50mm, the levigate then granularity to 2mm with waste concrete;
Step 2, the fine grinding quicklime (or white lime of corresponding amount) that adds 25% (mass ratio) in levigated waste concrete particulate stirs, and adds a certain amount of water (water-solid ratio is 0.25, mass ratio), stirs;
Step 3 is adobe or sheet material with the mixture that stirs at the forming under the pressure of 5MPa, and constant temperature steams and pressed 6 hours in the autoclave of the saturated vapor pressure of 1.3MPa, goes out still.
Embodiment two:
Step 1 is broken into fragment below the 50mm with waste concrete, levigate then to specific surface area greater than 300m
2The powder of/kg;
Step 2, in levigated waste concrete powder (flyash, sand powder, steel-making slag powder or the slag powders that can mix 10～80% mass ratioes replace the waste concrete powder), the aluminium powder that adds 0.8 ‰ (mass ratioes), (water-solid ratio is 0.50 to add a certain amount of water, mass ratio), stir, add the fine grinding quicklime of 25% (mass ratio), stir;
Step 3 is injected mould with the mixture that stirs, quiet stop 2 hours after, cutting, constant temperature steams and pressed 6 hours in the autoclave of the saturated vapor pressure of 1.3MPa, goes out still.
Claims (9)
1. a method of utilizing waste concrete to produce steam-pressing silicate products is characterized in that: a) the waste concrete piece is crushed to granularity less than 50mm; B) with the waste concrete piece of fragmentation levigate to granularity less than 2mm, form the available twice-laid stuff; C) twice-laid stuff and the lime that described waste concrete is made, and add a certain amount of water, the solid mass ratio of water is 0.25, mixes the back and make steam-pressing silicate products under autoclaved condition.
2. the method for utilizing waste concrete to produce steam-pressing silicate products according to claim 1 is characterized in that: add a certain amount of water, the solid mass ratio of water is 0.25, mixes the back and make steam-pressing silicate products under autoclaved condition.
3. the method for utilizing waste concrete to produce steam-pressing silicate products according to claim 2, it is characterized in that: lime accounts for 5～40% of solid total mass.
4. the method for utilizing waste concrete to produce steam-pressing silicate products according to claim 4, it is characterized in that: lime accounts for 5～35% of solid total mass.
5. the method for utilizing waste concrete to produce steam-pressing silicate products according to claim 1 is characterized in that: flyash, sand powder, steel-making slag powder or slag powders material are partly replaced twice-laid stuff that described waste concrete makes mix with lime and then make steam-pressing silicate products under autoclaved condition.
6. the method for utilizing waste concrete to produce steam-pressing silicate products according to claim 5, it is characterized in that: the replacement amount of flyash, sand powder, slag or slag material is 10～80% of a waste concrete quality, and lime accounts for 5～40% of solid total mass.
7. the method for utilizing waste concrete to produce steam-pressing silicate products according to claim 6, it is characterized in that: lime accounts for 5～35% of solid total mass.
8. according to the described method of utilizing waste concrete to produce steam-pressing silicate products of one of claim 1-7, described mixture is adobe or sheet material at the forming under the pressure of 5MPa, and constant temperature steams and pressed 6 hours in the autoclave of the saturated vapor pressure of 1.3MPa, goes out still.
9. the method for utilizing waste concrete to produce steam-pressing silicate products according to claim 1 is broken into fragment below the 50mm with waste concrete, levigate then to specific surface area greater than 300m
2The powder of/kg; The adding mass ratio is 0.8 ‰ aluminium powder in levigated waste concrete powder, adds a certain amount of water, and the solid mass ratio of water is 0.50, stirs, and adds fine grinding quicklime again, stirs; Then the mixture that stirs is injected mould, quiet stop 2 hours after, cutting, constant temperature steams and pressed 6 hours in the autoclave of the saturated vapor pressure of 1.3MPa, goes out still.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510053577XA CN1332905C (en) | 2005-03-10 | 2005-03-10 | Method for producing steam-pressing silicate products by waste concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510053577XA CN1332905C (en) | 2005-03-10 | 2005-03-10 | Method for producing steam-pressing silicate products by waste concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1830874A true CN1830874A (en) | 2006-09-13 |
| CN1332905C CN1332905C (en) | 2007-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510053577XA Expired - Fee Related CN1332905C (en) | 2005-03-10 | 2005-03-10 | Method for producing steam-pressing silicate products by waste concrete |
Country Status (1)
| Country | Link |
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| CN (1) | CN1332905C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955375A (en) * | 2010-09-15 | 2011-01-26 | 浙江工业大学 | Method for recycling waste concrete broken fine particles |
| CN102765917A (en) * | 2012-06-30 | 2012-11-07 | 安徽中龙建材科技有限公司 | Method capable of utilizing city inorganic waste to produce aerated hollow brick |
| CN103435315A (en) * | 2013-08-15 | 2013-12-11 | 太原钢铁(集团)有限公司 | Method for preventing surface blistering of fly ash steam-pressing brisk |
| CN109369128A (en) * | 2018-10-19 | 2019-02-22 | 户县融基建材有限责任公司 | A kind of method and its building block using building waste and mill tailings preparation building block |
| CN110252768A (en) * | 2019-06-17 | 2019-09-20 | 中国矿业大学 | A kind of quick-fried solution waste concrete component separation method of steam pressure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010003718A (en) * | 1999-06-24 | 2001-01-15 | 김영창 | Interial and exterial finish building material of building structure using a stone panel and manufacturing method of it |
| CN1290630C (en) * | 2003-09-18 | 2006-12-20 | 黄浩庭 | Recovering method of waste concrete and use of recovered material |
-
2005
- 2005-03-10 CN CNB200510053577XA patent/CN1332905C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955375A (en) * | 2010-09-15 | 2011-01-26 | 浙江工业大学 | Method for recycling waste concrete broken fine particles |
| CN102765917A (en) * | 2012-06-30 | 2012-11-07 | 安徽中龙建材科技有限公司 | Method capable of utilizing city inorganic waste to produce aerated hollow brick |
| CN103435315A (en) * | 2013-08-15 | 2013-12-11 | 太原钢铁(集团)有限公司 | Method for preventing surface blistering of fly ash steam-pressing brisk |
| CN109369128A (en) * | 2018-10-19 | 2019-02-22 | 户县融基建材有限责任公司 | A kind of method and its building block using building waste and mill tailings preparation building block |
| CN110252768A (en) * | 2019-06-17 | 2019-09-20 | 中国矿业大学 | A kind of quick-fried solution waste concrete component separation method of steam pressure |
| CN110252768B (en) * | 2019-06-17 | 2023-09-26 | 中国矿业大学 | Autoclaved exploded waste concrete component separation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1332905C (en) | 2007-08-22 |
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