CN105254324A - Air-entrapping steam curing component prepared from construction waste and preparation method thereof - Google Patents
Air-entrapping steam curing component prepared from construction waste and preparation method thereof Download PDFInfo
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- CN105254324A CN105254324A CN201510634352.7A CN201510634352A CN105254324A CN 105254324 A CN105254324 A CN 105254324A CN 201510634352 A CN201510634352 A CN 201510634352A CN 105254324 A CN105254324 A CN 105254324A
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- building waste
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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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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses an air-entrapping steam curing component prepared from construction waste and a preparation method thereof. The air-entrapping steam curing component is composed of, by weight, 76-90% of construction waste powder, 0-8% of lime powder, 9.995-23.98% of water-soluble polymer compound water solution and 0.005-0.02% of foaming agents, wherein the construction waste powder is one or more of waste concrete powder, waste brick powder, waste glass powder and waste mortar powder; the lime powder is one or both of quick lime powder and hydrated lime powder; the water-soluble polymer compound is one or more of polyvinyl alcohol, hydroxypropyl methyl cellulose, polyacrylamide, sodium polyacrylate and sodium alginate, and the concentration by weight percentage of the water-soluble polymer compound water solution ranges from 0.05% to 1%. The air-entrapping steam curing component has the advantages of being low in cost and good in quality, conforming to requirements for energy conservation and emission reduction and the like.
Description
Technical field
The invention belongs to building material technical field, particularly relate to steam-cured component of aerating of a kind of building waste making and preparation method thereof.
Background technology
Building waste refers to that people are in the general designation being engaged in the dregs, waste and old concrete, waste and old masonry and other wastes that produce in the activity in production of the construction industries such as removal, construction, finishing, repairerment.Along with the acceleration of industrialization, urbanization process, construction industry is also simultaneously fast-developing, and accompany and the building waste of generation is increasing, the quantity of Chinese architecture rubbish has accounted for more than 1/3 of municipal wastes total amount.Within 2014, China produces building waste 2,400,000,000 tons; and in the gesture of surging year by year; main with air storage or land-fill method process at present; this processing mode occupies a large amount of soils; and cause serious environmental pollution; seriously injure the existence of the mankind, to building waste recycling be protection of the environment, the preferred approach that economizes on resources.But the reuse ratio of the current building waste of China only about 5%, mainly be applied as: (1) makes building foundation bed course or road cushion, (2) after fragmentation, concrete building bricks, paving brick etc. is produced, (3) by waste concrete, useless brick through pulverizing, shaping, sieve and make aggregate and substitute sandstone.First method consumption very little, for the building waste of flood tide, be an utterly inadequate amount, and require the building waste adopting high strength, second method have employed cement, and the brick made is of poor quality, can only be used for the place that requirement is low, the third method is the maximum application mode of current building waste, but its performance of aggregate be made up of building waste is far worse than natural sandstone, many important buildings (as motorway, Highrise buildings, bridge etc.) do not allow to adopt, and limit its application.
Building Energy in use is very huge; development insulating wall material runs off with the energy reducing architectural exterior-protecting construction; it is one of major measure improving building energy utilising efficiency; insulating wall material can be divided into building block, brick and sheet material three major types purposes; the concrete segment of non-sintered that what wherein consumption was maximum is; mainly contain ceramsite concrete blocks, normal concrete building block, flyash, sand, slag air-entrained concrete building block, these all need to adopt cement, are highly energy-consuming, high pollution product.In addition as application number 200720177788.9 discloses a kind of pouring socket type multi-hole self-heat insulating building blocks, application number 201120122142.7 discloses one and block structure is designed to cavity, and then fill the technology of heat insulation foam, application number 200710000014.3 discloses a kind of building block technique of moth slabstone clamping styrofoam.The insulation blocks that these patent documentations are introduced, or poor stability (as adopted the organic polymer materials such as polyphenyl), otherwise structural manufacturing process is complicated, waste utilization rate is low, cost is high, limits their application.
Summary of the invention
In order to the problem that the recycling problem and building energy consumption that solve building waste are better high, the object of this invention is to provide that a kind of cost is low, quality good, steam-cured component of aerating made of building waste meeting energy-saving and emission-reduction requirement and preparation method thereof.
The technical scheme realizing the object of the invention employing is:
The steam-cured component of aerating that building waste provided by the invention makes, is made up of the raw material of following weight percent:
Building waste powder 76 ~ 90%, lime powder 0 ~ 8%, the water-soluble high-molecular compound aqueous solution 9.995 ~ 23.98%, whipping agent 0.005 ~ 0.02%;
Described building waste powder is one or more in waste concrete powder, useless brick powder, waste glass powder, useless grey starch;
Described lime powder is one or both in calcium lime powder and dry hydrate, requires that effective calcium oxide or calcium hydroxide content are greater than 70%;
Described water-soluble high-molecular compound is one or more in polyvinyl alcohol, Vltra tears, polyacrylamide, sodium polyacrylate, sodium alginate, and the weight percent concentration of the water-soluble high-molecular compound aqueous solution is 0.05 ~ 1%.
Described component comprises building block, brick, sheet material.
Preferably, described useless brick powder is one or more in waste water adobe powder, waste slag brick powder, useless Dinas brickes powder, useless common brick powder, useless tile powder, useless refractory brick powder.
Preferably, the fineness of described building waste powder and lime powder is particle diameter <0.1mm, and 200 mesh sieve screen over-sizes are no more than 5%.
Preferably, described whipping agent is the one in gas-forming property whipping agent and bleed whipping agent.
Preferably, described gas-forming property whipping agent is the one in aluminium powder, aluminium powder cream and hydrogen peroxide.
Preferably, described bleed whipping agent is the one in triterpenoid saponin air entrapment agent, sodium abietate air entrapment agent and sodium alkyl sulfate air entrapment agent.
The preparation method of the steam-cured component of described aerating provided by the invention, comprises the following steps:
Step 1, by water-soluble for described macromolecular compound, is mixed with the aqueous solution that weight percent concentration is 0.05 ~ 1%;
Step 2, pulverizes described building waste and unslaked lime, levigate to particle diameter <0.1mm, 200 mesh sieve screen over-size <5%, or replaces unslaked lime 100 order ~ 200 mesh sieves to divide extracting screen underflow with white lime;
Step 3, is converted to the aqueous solution by building waste powder 76 ~ 90%, lime powder 0 ~ 8%, the water-soluble high-molecular compound aqueous solution 9.995 ~ 23.98%(), the weight percent of whipping agent 0.005 ~ 0.02% weighed raw material;
Step 4, makes adobe by the stirring of load weighted for step 3 building waste powder, lime powder and the water-soluble high-molecular compound aqueous solution, pressure forming;
Step 5, the adobe of step 4 being made is transplanted in autoclave, and at 160 DEG C ~ 200 DEG C, steam press maintenance is after 10 ~ 60 minutes, goes out still, the demoulding, is cut into half-mature adobe;
Step 6, the half-mature adobe of step 5 being made is transferred to autoclave again, steam press maintenance 2.5 ~ 8 hours at 180 DEG C ~ 210 DEG C, then goes out still maintenance more than 2 days, namely obtains the steam-cured component of finished product aerating (building block, brick, sheet material etc.).
The intensity of steam curing cement component (as stake, pipe, electric pole etc.) is CaO and SiO higher than the concrete reason of natural curing
2under hydrothermal conditions (optimum temps 180 DEG C ~ 220 DEG C), tobermorite (5CaO6SiO is generated
25H
2o), another also have the hydrated product such as C-S-H gel and mirabilitum crystallina pomegranate stone, and normal temperature curing concrete only has C-S-H gel, and the intensity of tobermorite is higher than C-S-H gel.
All CaO and SiO is contained in concrete in building waste, cement brick, cinder brick, common brick, ceramic tile, refractory brick, mortar
2, containing SiO in glass
2particularly in waste concrete containing more than 16% the non-hydrated cement of (different according to the length of concrete service time) and calcium hydroxide, also maintain the activity of former cement, inherently intensity can be produced, therefore for waste concrete building waste, only need add a small amount of CaO or do not add CaO also can steam-cured go out the steam-cured component of some strength.
In the present invention, lime powder additional proportion needs to decide according to the kind of building waste, form tobermorite, batching mole ratio (CaO/SiO
2) preferably between 0.75 ~ 0.95, if more than 80% of building waste powder is waste concrete powder, then only need add the lime powder of less than 2% or not add lime powder, because waste concrete itself also has the non-aquation of cement of more than 16%, containing calcium source in unhydrated cement, even also containing appropriate calcium hydroxide in the cement of aquation; For waste glass powder, because of not calcic source, require that the ratio adding lime powder is higher, need about 8%; For useless common brick powder, useless refractory brick powder and useless tile powder, because calcic source is less, need add the lime powder of 4 ~ 8%, general building waste is the mixture of various raw material, and just ratio is different, magnesium oxide in lime, magnesium hydroxide have the effect close with lime, but Performance Ratio lime is poor.
Calcium lime powder by mechanical disintegration, need be met water reaction and generates calcium hydroxide, generate fresh calcium hydroxide because unslaked lime reacts with water in brickmaking process, active strong, therefore effect is better than white lime, white lime is formed by the caustic lime block digestion that adds water, and does not need to pulverize, cost is low.
Macromolecular compound both can improve raw green strength, and also can improve the intensity of adobe after steam pressure, and add-on is few, cost is low.
Steam pressure temperature in the inventive method, pressure and steam pressure time, because the Hydrothermal Synthesis temperature range that tobermorite crystallization is desirable is 180 DEG C ~ 220 DEG C, temperature is high, crystallization velocity is fast, require that the time of steam pressure is short, temperature is low then contrary, but temperature is high, then saturated vapour pressure is large, high to the requirement of withstand voltage of autoclave, therefore the present invention adopts the steam pressure temperature of 180 DEG C ~ 210 DEG C, corresponding pressure is 1.4MPa ~ 1.90MPa, when adopting the steam pressure temperature of 180 DEG C, the steam pressure time is 8 hours, be 6 hours when 190 DEG C, be 4 hours when 200 DEG C, be 2.5 ~ 3 hours when 210 DEG C.
Beneficial effect of the present invention:
Relative to prior art, advantage of the present invention is as follows:
1, the aerated-block density 700Kg/m of preparation
3left and right, thermal conductivity≤0.16w/mk, ultimate compression strength>=5MPa, be greater than concrete segment national standard.
2, substantially all adopt building waste, greatly alleviate the burden of building waste landfill and process, turn waste into wealth, meet energy-saving and emission-reduction requirement.
3, adopt building waste make starting material, solve raw-material come source problem, reduce cost.
4, water-soluble high-molecular compound can improve just base and product strength, and has the effect of stabilise bubbles.
Technical scheme of the present invention is further illustrated below in conjunction with embodiment.
Embodiment
Embodiment 1
With the steam-cured component of aerating that building waste makes, obtained by the raw material of following weight per-cent: waste concrete powder 90%, weight percent concentration are the Vltra tears aqueous solution 9.995%, the aluminium powder 0.005% of 0.5%.
The preparation method of the steam-cured component of described aerating comprises the following steps:
1, described Vltra tears and water are mixed and heated to 100 DEG C, make the Vltra tears aqueous solution that weight percent concentration is 0.5%;
2, by levigate for waste concrete to particle diameter <0.1mm, 200 mesh sieve screen over-size <5%;
3, described raw material is pressed described proportioning weighing;
4, blank is made in the raw material weighed up mixing, stirring, pressure forming;
5, the blank of forming is transferred to autoclave, at 160 DEG C steam-cured 40 minutes, goes out still, the demoulding, cutting;
6, the blank that step 5 is made is transferred to autoclave again, at 200 DEG C steam-cured 4 hours, then goes out still maintenance more than 2 days, namely obtain the steam-cured component of finished product aerating (building block, brick, sheet material etc.).
Embodiment 2
With the steam-cured component of aerating that building waste makes, obtained by the raw material of following weight per-cent: waste concrete 55%, useless common brick powder 21%, calcium lime powder 4%, weight percent concentration are polyvinyl alcohol water solution 19.99%, the aluminium powder cream 0.01% of 1%.
In calcium lime powder, the content of free calcium oxide is greater than 70%.
The preparation method of the steam-cured component of described aerating, except waste concrete and unslaked lime being pulverized in step 2, levigate to particle diameter <0.1mm, outside 200 mesh sieve screen over-size <5%, all the other are with embodiment 1.
Embodiment 3
With the steam-cured component of aerating that building waste makes, obtained by the raw material of following weight per-cent: useless common brick powder 82%, dry hydrate 8%, weight percent concentration are polyacrylamide solution 9.99%, the triterpenoid saponin air entrapment agent 0.01% of 1%.
In dry hydrate, available hydrogen calcium oxide content is greater than 70%.
The preparation method of the steam-cured component of described aerating, except replacing calcium lime powder with dry hydrate, all the other are with embodiment 2.
Embodiment 4
With the steam-cured component of aerating that building waste makes, obtained by the raw material of following weight per-cent: waste slag brick powder 38%, useless tile powder 38%, calcium lime powder 5%, dry hydrate 3%, weight percent concentration are polyacrylamide solution 15.985%, the sodium abietate air entrapment agent 0.015% of 1%.
In calcium lime powder, the content of free calcium oxide is greater than 70%, and in dry hydrate, available hydrogen calcium oxide content is greater than 70%.
The preparation method of the steam-cured component of described aerating is with embodiment 2.
Embodiment 5
With the steam-cured component of aerating that building waste makes, obtained by the raw material of following weight per-cent: waste concrete powder 25%, useless common brick powder 25%, waste glass powder 23%, dry hydrate 7%, weight percent concentration are aqueous sodium polyacrylate 23.98%, the sodium alkyl sulfate air entrapment agent 0.02% of 0.05%.
In dry hydrate, available hydrogen calcium oxide content is greater than 70%.
The preparation method of the steam-cured component of described aerating is with embodiment 2.
Embodiment 6
With the steam-cured component of aerating that building waste makes, obtained by the raw material of following weight per-cent: waste concrete powder 25%, useless refractory brick powder 25%, useless grey starch 24%, calcium lime powder 6%, weight percent concentration are sodium alginate aqueous solution 19.98%, the hydrogen peroxide 0.02% of 1%.
In calcium lime powder, the content of free calcium oxide is greater than 70%.
The preparation method of the steam-cured component of described aerating is with embodiment 2.
The detection of autoclaved brick intensity through there being constitutional law regular inspection to survey unit of each embodiment, result is as shown in the table:
As seen from the above table, the ultimate compression strength of the steam-cured component of aerating that the present invention's building waste makes reaches the requirement of B06 level air-entrained concrete building block in GB11968-2006, and thermal conductivity is low, high insulating effect.
Above embodiment; it is only section Example of the present invention; instead of whole embodiment, neither be used for limiting the scope of the invention, equivalents done on the basis of technique scheme or the alternative scope that all should fall into the claims in the present invention and protect.
Claims (8)
1., with the steam-cured component of aerating that building waste makes, it is characterized in that being made up of the raw material of following weight percent:
Building waste powder 76 ~ 90%, lime powder 0 ~ 8%, the water-soluble high-molecular compound aqueous solution 9.995 ~ 23.98%, whipping agent 0.005 ~ 0.02%;
Described building waste powder is one or more in waste concrete powder, useless brick powder, waste glass powder, useless grey starch;
Described lime powder is one or both in calcium lime powder and dry hydrate, requires that effective calcium oxide or calcium hydroxide content are greater than 70%;
Described water-soluble high-molecular compound is one or more in polyvinyl alcohol, Vltra tears, polyacrylamide, sodium polyacrylate, sodium alginate, and the weight percent concentration of the water-soluble high-molecular compound aqueous solution is 0.05 ~ 1%.
2. the steam-cured component of aerating of building waste making according to claim 1, is characterized in that described component is building block, brick, sheet material.
3. the steam-cured component of aerating that makes of building waste according to claim 1, is characterized in that described useless brick powder is one or more in waste water adobe powder, waste slag brick powder, useless Dinas brickes powder, useless common brick powder, useless tile powder, useless refractory brick powder.
4. the steam-cured component of aerating of building waste making according to claim 1, it is characterized in that the fineness of described building waste powder and lime powder is particle diameter <0.1mm, 200 mesh sieve screen over-sizes are no more than 5%.
5. the steam-cured component of aerating that makes of building waste according to claim 1, is characterized in that described whipping agent is the one in gas-forming property whipping agent and bleed whipping agent.
6. the steam-cured component of aerating of building waste making according to claim 5, is characterized in that described gas-forming property whipping agent is the one in aluminium powder, aluminium powder cream and hydrogen peroxide.
7. the steam-cured component of aerating of building waste making according to claim 5, is characterized in that described bleed whipping agent is the one in triterpenoid saponin air entrapment agent, sodium abietate air entrapment agent and sodium alkyl sulfate air entrapment agent.
8. a preparation method for the steam-cured component of aerating as claimed in claim 1, is characterized in that comprising the following steps:
Step 1, by water-soluble for described macromolecular compound, is mixed with the aqueous solution that weight percent concentration is 0.05 ~ 1%;
Step 2, pulverizes described building waste and unslaked lime, levigate to particle diameter <0.1mm, 200 mesh sieve screen over-size <5%, or replaces unslaked lime 100 order ~ 200 mesh sieves to divide extracting screen underflow with white lime;
Step 3, has weighed raw material by the weight percent of building waste powder 76 ~ 90%, lime powder 0 ~ 8%, the water-soluble high-molecular compound aqueous solution 9.995 ~ 23.98%, whipping agent 0.005 ~ 0.02%;
Step 4, makes adobe by the stirring of load weighted for step 3 building waste powder, lime powder and the water-soluble high-molecular compound aqueous solution, pressure forming;
Step 5, the adobe of step 4 being made is transplanted in autoclave, and at 160 DEG C ~ 200 DEG C, steam press maintenance is after 10 ~ 60 minutes, goes out still, the demoulding, is cut into half-mature adobe;
Step 6, the half-mature adobe of step 5 being made is transferred to autoclave again, steam press maintenance 2.5 ~ 8 hours at 180 DEG C ~ 210 DEG C, then goes out still maintenance more than 2 days, namely obtains the steam-cured component of finished product aerating.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045559A (en) * | 2016-06-02 | 2016-10-26 | 湖州汇能新材料科技有限公司 | Aerated concrete slab preparation method |
| CN106045558A (en) * | 2016-06-02 | 2016-10-26 | 湖州汇能新材料科技有限公司 | Aerated concrete block preparation method |
| CN106277925A (en) * | 2016-08-18 | 2017-01-04 | 广东海顺新材料科技有限公司 | Decorative building material that a kind of silicate solid waste manufactures and preparation method thereof |
| CN106363773A (en) * | 2016-08-31 | 2017-02-01 | 宋艳荣 | Production process for aerated block steam-curing finished blank |
| CN106365570A (en) * | 2016-08-25 | 2017-02-01 | 济南轨道交通集团有限公司 | Autoclaved brick prepared from waste clay brick and preparation method thereof |
| CN106630880A (en) * | 2017-01-17 | 2017-05-10 | 张春涛 | Autoclaved aerated concrete blocks adopting sorted construction waste materials as all siliceous materials, as well as preparation method thereof |
| CN106966696A (en) * | 2017-04-06 | 2017-07-21 | 合肥欧克斯新型建材有限公司 | Permeable pavement brick and its preparation technology prepared by a kind of utilization architecture sediment |
| CN109320180A (en) * | 2018-11-28 | 2019-02-12 | 南京佳荣再生物资回收有限公司 | Utilize the preparation method of building castoff production composite brick |
| CN109369215A (en) * | 2018-12-27 | 2019-02-22 | 金陵科技学院 | A kind of preparation method of the renewable construction material of environmental protection |
| CN112549252A (en) * | 2020-12-09 | 2021-03-26 | 佛山市绿富域环保科技有限公司 | Preparation process of ecological brick taking household garbage incinerator slag as raw material |
| CN114716221A (en) * | 2022-04-21 | 2022-07-08 | 常州工学院 | Building solid waste autoclaved aerated concrete and preparation method thereof |
| CN116023085A (en) * | 2022-12-29 | 2023-04-28 | 上海浦东路桥(集团)有限公司 | Aerated concrete prepared based on decoration garbage reclaimed materials and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106045559A (en) * | 2016-06-02 | 2016-10-26 | 湖州汇能新材料科技有限公司 | Aerated concrete slab preparation method |
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| CN106277925A (en) * | 2016-08-18 | 2017-01-04 | 广东海顺新材料科技有限公司 | Decorative building material that a kind of silicate solid waste manufactures and preparation method thereof |
| CN106365570A (en) * | 2016-08-25 | 2017-02-01 | 济南轨道交通集团有限公司 | Autoclaved brick prepared from waste clay brick and preparation method thereof |
| CN106363773A (en) * | 2016-08-31 | 2017-02-01 | 宋艳荣 | Production process for aerated block steam-curing finished blank |
| CN106630880A (en) * | 2017-01-17 | 2017-05-10 | 张春涛 | Autoclaved aerated concrete blocks adopting sorted construction waste materials as all siliceous materials, as well as preparation method thereof |
| CN106966696A (en) * | 2017-04-06 | 2017-07-21 | 合肥欧克斯新型建材有限公司 | Permeable pavement brick and its preparation technology prepared by a kind of utilization architecture sediment |
| CN109320180A (en) * | 2018-11-28 | 2019-02-12 | 南京佳荣再生物资回收有限公司 | Utilize the preparation method of building castoff production composite brick |
| CN109369215A (en) * | 2018-12-27 | 2019-02-22 | 金陵科技学院 | A kind of preparation method of the renewable construction material of environmental protection |
| CN112549252A (en) * | 2020-12-09 | 2021-03-26 | 佛山市绿富域环保科技有限公司 | Preparation process of ecological brick taking household garbage incinerator slag as raw material |
| CN114716221A (en) * | 2022-04-21 | 2022-07-08 | 常州工学院 | Building solid waste autoclaved aerated concrete and preparation method thereof |
| CN116023085A (en) * | 2022-12-29 | 2023-04-28 | 上海浦东路桥(集团)有限公司 | Aerated concrete prepared based on decoration garbage reclaimed materials and preparation method thereof |
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