CN102826796B - Fragment of brick made with the composition containing mud and building waste and preparation method thereof - Google Patents
Fragment of brick made with the composition containing mud and building waste and preparation method thereof Download PDFInfo
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- CN102826796B CN102826796B CN201110159511.4A CN201110159511A CN102826796B CN 102826796 B CN102826796 B CN 102826796B CN 201110159511 A CN201110159511 A CN 201110159511A CN 102826796 B CN102826796 B CN 102826796B
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- mud
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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
Abstract
The present invention relates to the preparation method of the fragment of brick that a kind of use is made containing the composition of mud and building waste, the method comprises the following steps: mud, exciting agent contact with industrial residue mixing by (1), obtain binding agent, wherein, the water-content of described mud is more than 80 % by weight, and described exciting agent contains water glass and alkali metal hydroxide; (2) aggregate is mixed with the described binding agent obtained in step (1), then carry out shaping and solidification.The invention still further relates to the fragment of brick prepared by described method.In the present invention, not only to without concentrated or recycle merely through mud concentrated simply, but also can recycle building waste; In addition, prepared according to the methods of the invention fragment of brick has higher ultimate compression strength, and its Leaching is lower.
Description
Technical field
The present invention relates to the preparation method of the fragment of brick that a kind of use is made containing the composition of mud and building waste, and the fragment of brick that the use prepared by the method is made containing the composition of mud and building waste.
Background technology
The mud produced in sewage treatment process, its water content is usually more than 95 % by weight.Even if after conventional concentration, its water content also only can be reduced to more than 80 % by weight.Under normal circumstances, in order to recycle described mud, need to dewater further to it, so that its water content is reduced to less than 60 % by weight.But when described sludge condensation is about 80 % by weight to water content, the solid matter in described mud and water form colloid, are difficult to further dehydration under normal conditions, and only just can realize further dehydration under high pressure, high heat condition.Therefore, the highly energy-consuming under high pressure, condition of high voltage significantly limit the recycling of mud.
Summary of the invention
The object of the invention is to need to carry out the degree of depth to mud and concentrate to overcome in prior art the shortcoming just can recycled, provide a kind of preparation method of fragment of brick, the method can to without concentrated or recycle merely through mud concentrated simply, and obtainedly have higher physical strength and the lower fragment of brick of Leaching.
The invention provides the preparation method of the fragment of brick that a kind of use is made containing the composition of mud and building waste, the method comprises the following steps:
(1) mud, exciting agent are contacted with industrial residue mixing, obtain binding agent, wherein, the water-content of described mud is more than 80 % by weight, and described exciting agent contains water glass and alkali metal hydroxide;
(2) aggregate is mixed with the described binding agent obtained in step (1), be then adobe by gained mixture forming, and this adobe is solidified.
Present invention also offers the fragment of brick that a kind of use is made containing the composition of mud and building waste, wherein, this fragment of brick is obtained by described method of the present invention.
In the preparation method of described fragment of brick provided by the invention, directly can utilize without concentrated or merely through simple concentrated mud, thus achieve without concentrated or merely through the recycling of simple concentrated mud.
In the preparation method of described fragment of brick provided by the invention, described aggregate can be various building waste, thus can realize the recycling to building waste.
And in the present invention, industrial residue can be used as the formation raw material of binding agent, and therefore, the present invention also achieves the recycling to industrial residue.
In addition, owing to usually containing a certain amount of toxic pollutant in mud, as heavy metal and the difficult organic pollutant etc. decomposed, and after the formed material chance water retting adopting mud to make, these toxic pollutants can ooze out and cause environmental pollution, thus have certain Leaching.But, in described method of the present invention, owing to have employed the binding agent be made up of mud, exciting agent and industrial residue, toxic pollutant in mud can lock and remain in the solid ingredient of mud by this binding agent, makes the Leaching of prepared according to the methods of the invention fragment of brick lower.
In addition, the fragment of brick that prepared by method according to the present invention has higher physical strength.
Embodiment
The invention provides the preparation method of the fragment of brick that a kind of use is made containing the composition of mud and building waste, the method comprises the following steps:
(1) mud, exciting agent are contacted with industrial residue mixing, obtain binding agent, wherein, the water-content of described mud is more than 80 % by weight, and described exciting agent contains water glass and alkali metal hydroxide;
(2) aggregate is mixed with the described binding agent obtained in step (1), be then adobe by gained mixture forming, and this adobe is solidified.
In the present invention, described mud is the mixture of solid sediment and the water obtained in sewage treatment process.The present invention can use without concentrated mud, also can use the mud obtained merely through simple concentration.The mud without any processed obtained after the described mud without concentrating refers to sewage disposal, its water-content is generally more than 95 % by weight, is preferably 95-99 % by weight.The mud that the mud obtained after the described mud obtained merely through simple concentration refers to sewage disposal obtains after conventional concentration (as gravity concentration method, floatation thickening method, belt gravity concentration method, centrifugal concentrating method etc.), its water-content is generally 80-95 % by weight.
In the present invention, described mud is preferably without concentrated mud, and namely water-content is the mud of 95-99 % by weight.
In the present invention, the sewage obtaining described mud can be industrial sewage, sanitary sewage etc., and described industrial sewage such as can for being derived from the production waste in paper mill, production waste, the production waste in dressing-works, the production waste etc. of refinery of weaving length.
According to described method provided by the invention, in order to ensure that described binding agent has higher cohesive strength, prepared according to the methods of the invention fragment of brick is made to have higher physical strength, and prevent the toxic pollutant in mud from leaching and contaminate environment, make the Leaching of prepared according to the methods of the invention fragment of brick lower, in step (1), the weight ratio of the consumption of described mud, exciting agent and industrial residue is preferably (0.2-0.6): (0.2-0.5): 1, more preferably (0.3-0.5): (0.25-0.4): 1.
In the present invention, there is no particular limitation for described industrial residue, can be various routine containing SiO
2and Al
2o
3industrial residue.In the preferred case, SiO in described industrial residue
2and Al
2o
3total content preferably account for more than 30 % by weight, more preferably account for more than 50 % by weight, as 50-70 % by weight.Under further preferable case, SiO in described industrial residue
2and Al
2o
3weight ratio be 1: 0.1-10, be preferably 1: 0.2-5.In most preferred situation, described industrial residue is flyash and/or slag.
In the present invention, select described exciting agent that activeconstituents in industrial residue can not only be excited (as SiO
2and Al
2o
3) react, to produce good tackiness, but also can play the toxic pollutant in locking mud, the Leaching making method according to the present invention prepare fragment of brick is lower.In the preferred case, in described exciting agent, the content of water glass is 60-90 % by weight, is more preferably 50-80 % by weight; The content of alkali metal hydroxide is 10-40 % by weight, is more preferably 20-50 % by weight.Usually, described exciting agent exists with the form of the aqueous solution containing water glass and alkali metal hydroxide, and in this case, in the weight ratio of above-mentioned mud, exciting agent and industrial residue, the weight of described exciting agent refers to the weight of component in addition to water, such as, when component in addition to water in described exciting agent be water glass and alkali metal hydroxide time, then the weight of described exciting agent refers to the gross weight of water glass and alkali metal hydroxide.
In the present invention, described alkali metal hydroxide can be such as one or more in sodium hydroxide, potassium hydroxide etc.
In the present invention, mud, exciting agent and industrial residue are mixed the special requirement of the condition that contacts, such as described mixing contact can contact 10-120 minute at room temperature to 80 DEG C.
According to described method provided by the invention, for the ease of shaping, relative to the described aggregate of 100 weight parts, the content of described binding agent is preferably 5-100 weight part, is preferably 10-40 weight part.
In the present invention, described aggregate can be the pellet playing skeleton and filling effect of various routine, such as, can be one or more in rubble, silica sand and building waste (rubble, cement block, dregs, rejected material etc. as produced in construction process).Under preferable case, described aggregate is described building waste, as cement block, rubble, fragment of brick etc.Under this preferable case, the present invention can realize recycling building waste.
In the present invention, the particle size of described aggregate is preferably 5-30mm.Ultimate range on the surface that described particle size refers to particles of aggregates between any two points.When the particle size preparing the material being used as described aggregate is larger, described method also comprises carries out fragmentation to this material, makes its particle size reach above-mentioned numerical range.
A preferred embodiment of the invention, described method is also included in the process mixed with the described binding agent obtained in step (1) by aggregate and adds reodorant, to remove the peculiar smell existed in described mud.
In the present invention, there is no particular limitation for described reodorant, and the material can removing the peculiar smell in described mud of various routine is all applicable in the present invention.In the preferred case, described reodorant is calcium oxide and/or calcium hydroxide.Under this preferable case, calcium oxide and/or calcium hydroxide effectively can not only remove the peculiar smell in described mud, but also can play a part to accelerate fix and improve the physical strength of the fragment of brick finally prepared.
Under further preferable case, relative to the described aggregate of 100 weight parts, the content of described reodorant is 0.25-10 weight part, is preferably 0.5-5 weight part.
According to described method provided by the invention, there is no particular limitation for described shaping method, forming method is conveniently implemented, and described shaping method such as the filling of the compound of described aggregate and binding agent being built in a mold, or can carry out extrusion molding.
According to described method provided by the invention, described shaping after the adobe that obtains can be the shape of various routine, can be such as rectangular parallelepiped or square.There is no particular limitation for the size of described adobe, and such as, the length and width of described adobe and high ratio can be 1-10: 1-5: 1.
According to described method provided by the invention, the restriction that the condition of described solidification does not have, as long as shaping compound can be solidified, under preferable case, the condition of described solidification comprises: solidification value is room temperature to 100 DEG C, and set time is 2-24 hour.
According to described method provided by the invention, in order to make the fragment of brick of final preparation have higher intensity, preferably the fragment of brick obtained after overcuring being placed for some time (as 3-30 days) at ambient temperature, and then carrying out follow-up use.
Present invention also offers the fragment of brick prepared by aforesaid method.
The invention will be further described by the following examples.
Embodiment 1
Fragment of brick that the composition that the present embodiment contains mud and building waste for illustration of described use provided by the invention is made and preparation method thereof.
(1) preparation of exciting agent
The sodium hydroxide of the water glass of 65 weight parts and 35 weight parts is added in 200 weight parts waters, stirs, thus obtained exciting agent.
(2) preparation of binding agent
By the flyash of the mud (be derived from ChangPing, Beijing City treatment center of sewage, water-content is wherein about 97 % by weight) of 40 weight parts, 100 weight parts (be derived from electric power flyash industrial of Beijing, wherein, SiO
2content be about 25 % by weight, Al
2o
3content be about 25 % by weight, surplus is FeO, Fe
2o
3, CaO, TiO
2deng) and 30 weight parts above-mentioned steps (1) in the exciting agent of preparation be at room temperature uniformly mixed 30 minutes, thus obtained binding agent.
(3) the shaping and solidification of building material compositions
The cement block (particle size is 5-30mm) of 100 weight parts, the binding agent of 30 weight parts and the CaO of 3 weight parts are uniformly mixed, obtain building material compositions of the present invention.Then, described building material compositions is added and carries out shaping in mould, solidify 24 hours at 80 DEG C afterwards, then carry out the demoulding, and at room temperature place 28 days, thus obtain the fragment of brick A1 of 55mm × 115mm × 240mm, do not smelt a strange smell by nose.
Embodiment 2
Fragment of brick that the composition that the present embodiment contains mud and building waste for illustration of described use provided by the invention is made and preparation method thereof.
Method according to embodiment 1 prepares building material compositions, and make fragment of brick, difference is, in step (1), the add-on of water glass is 95 weight parts, the add-on of sodium hydroxide is 5 weight parts, thus the fragment of brick A2 of obtained 55mm × 115mm × 240mm, do not smelt a strange smell by nose.
Embodiment 3
Fragment of brick that the composition that the present embodiment contains mud and building waste for illustration of described use provided by the invention is made and preparation method thereof.
Method according to embodiment 1 prepares building material compositions, and make fragment of brick, difference is, in step (1), the add-on of water glass is 55 weight parts, the add-on of sodium hydroxide is 45 weight parts, thus the fragment of brick A3 of obtained 55mm × 115mm × 240mm, do not smelt a strange smell by nose.
Embodiment 4
Fragment of brick that the composition that the present embodiment contains mud and building waste for illustration of described use provided by the invention is made and preparation method thereof.
Method according to embodiment 1 prepares building material compositions, and make fragment of brick, difference is, in step (2), the add-on of described mud is 15 weight parts, and the add-on of described flyash is 100 weight parts, and the add-on of described exciting agent is 55 weight parts, thus the fragment of brick A4 of obtained 55mm × 115mm × 240mm, do not smelt a strange smell by nose.
Embodiment 5
Fragment of brick that the composition that the present embodiment contains mud and building waste for illustration of described use provided by the invention is made and preparation method thereof.
Method according to embodiment 1 prepares building material compositions, and make fragment of brick, difference is, in step (2), the add-on of described mud is 65 weight parts, and the add-on of described flyash is 100 weight parts, and the add-on of described exciting agent is 5 weight parts, thus the fragment of brick A5 of obtained 55mm × 115mm × 240mm, do not smelt a strange smell by nose.
Embodiment 6
Fragment of brick that the composition that the present embodiment contains mud and building waste for illustration of described use provided by the invention is made and preparation method thereof.
Method according to embodiment 1 prepares building material compositions, and makes fragment of brick, and difference is, in step (3), does not add CaO, thus obtains the fragment of brick A6 of 55mm × 115mm × 240mm, can smell slight peculiar smell by nose.
Embodiment 7
Fragment of brick that the composition that the present embodiment contains mud and building waste for illustration of described use provided by the invention is made and preparation method thereof.
Method according to embodiment 1 prepares building material compositions, and makes fragment of brick, and difference is, in step (3), the add-on of CaO is 0.2 weight part, thus the fragment of brick A7 of obtained 55mm × 115mm × 240mm, slight peculiar smell can be smelt by nose.
Embodiment 8
Fragment of brick that the composition that the present embodiment contains mud and building waste for illustration of described use provided by the invention is made and preparation method thereof.
(1) preparation of exciting agent
The sodium hydroxide of the water glass of 50 weight parts and 50 weight parts is added in 200 weight parts waters, stirs, thus obtained exciting agent.
(2) preparation of binding agent
By the flyash of the mud (be derived from ChangPing, Beijing City treatment center of sewage, water-content is wherein about 99 % by weight) of 30 weight parts, 100 weight parts (be derived from electric power flyash industrial of Beijing, wherein, SiO
2content be about 25 % by weight, Al
2o
3content be about 25 % by weight, surplus is FeO, Fe
2o
3, CaO, TiO
2deng) and 40 weight parts above-mentioned steps (1) in the exciting agent of preparation be at room temperature uniformly mixed 30 minutes, thus obtained binding agent.
(3) the shaping and solidification of building material compositions
The cement block (particle size is 5-30mm) of 100 weight parts, the binding agent of 40 weight parts and the CaO of 3 weight parts are uniformly mixed, obtain building material compositions of the present invention.Then, described building material compositions is added and carries out shaping in mould, solidify 24 hours at 80 DEG C afterwards, then carry out the demoulding, and at room temperature place 28 days, thus obtain the fragment of brick A8 of 55mm × 115mm × 240mm, do not smelt a strange smell by nose.
Embodiment 9
Fragment of brick that the composition that the present embodiment contains mud and building waste for illustration of described use provided by the invention is made and preparation method thereof.
(1) preparation of exciting agent
The sodium hydroxide of the water glass of 80 weight parts and 20 weight parts is added in 200 weight parts waters, stirs, thus obtained exciting agent.
(2) preparation of binding agent
By the flyash of the mud (be derived from ChangPing, Beijing City treatment center of sewage, water-content is wherein about 95 % by weight) of 50 weight parts, 100 weight parts (be derived from electric power flyash industrial of Beijing, wherein, SiO
2content be about 25 % by weight, Al
2o
3content be about 25 % by weight, surplus is FeO, Fe
2o
3, CaO, TiO
2deng) and 25 weight parts above-mentioned steps (1) in the exciting agent of preparation be at room temperature uniformly mixed 30 minutes, thus obtained binding agent.
(3) the shaping and solidification of building material compositions
The cement block (particle size is 5-30mm) of 100 weight parts, the binding agent of 10 weight parts and the CaO of 3 weight parts are uniformly mixed, obtain building material compositions of the present invention.Then, described building material compositions is added and carries out shaping in mould, solidify 24 hours at 80 DEG C afterwards, then carry out the demoulding, and at room temperature place 28 days, thus obtain the fragment of brick A9 of 55mm × 115mm × 240mm, do not smelt a strange smell by nose.
Test case
(1) ultimate compression strength of described fragment of brick A1-A9 is detected according to the method for JC/T945-2005.
(2) Leaching of described fragment of brick A1-A9 is detected according to the method for GB5085.3-2007, and according to the degree of Leaching, according to 0,1,2,3,4,5,6,7,8,9 and 10, Leaching is divided into 11 grades, wherein, numerical value larger expression Leaching is larger, 0 represents do not have Leaching, and 1 represents that Leaching is lower, and 10 represent that Leaching is higher.
Its detected result is as shown in table 1 below.
Table 1
| Fragment of brick | A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 |
| Ultimate compression strength (MPa) | 36 | 20 | 18 | 25 | 24 | 29 | 31 | 35 | 36 |
| Leaching | 0 | 4 | 4 | 2 | 2 | 1 | 1 | 0 | 0 |
Can be found out by the data of upper table 1, prepared according to the methods of the invention fragment of brick has higher ultimate compression strength, and its Leaching is lower.
Claims (9)
1. a preparation method for the fragment of brick made with the composition containing mud and building waste, the method comprises the following steps:
(1) by mud, exciting agent and containing SiO
2and Al
2o
3industrial residue mixing contact, obtain binding agent, wherein, containing toxic pollutant in described mud, the water-content of described mud is more than 80 % by weight, described exciting agent contains water glass and alkali metal hydroxide, and the content of the water glass in described exciting agent is 80 % by weight, and the content of alkali metal hydroxide is 20 % by weight;
Described mud, exciting agent and containing SiO
2and Al
2o
3the weight ratio of consumption of industrial residue be 0.2-0.6: 0.5: 1;
Described containing SiO
2and Al
2o
3industrial residue be flyash and/or slag;
(2) mixed with the described binding agent obtained in step (1) by aggregate, relative to the described aggregate of 100 weight parts, the consumption of described binding agent is 5-100 weight part; Then be adobe by gained mixture forming, and this adobe is solidified;
Described aggregate is building waste.
2. method according to claim 1, wherein, in step (1), the condition of described mixing contact comprises: Contact Temperature is room temperature to 100 DEG C, and the time of contact is 2-24 hour.
3. method according to claim 1, wherein, in step (2), relative to the described aggregate of 100 weight parts, the consumption of described binding agent is 10-40 weight part.
4. the method according to claim 1 or 3, wherein, the particle size of described aggregate is 5-30mm.
5. method according to claim 1, wherein, described method is also included in the process mixed with the described binding agent obtained in step (1) by aggregate and adds reodorant, described reodorant is the material of the peculiar smell can removed in described mud, relative to the described aggregate of 100 weight parts, the content of described reodorant is 0.25-10 weight part.
6. method according to claim 5, wherein, described reodorant is calcium oxide and/or calcium hydroxide.
7. method according to claim 1 or 5, wherein, the condition of described solidification comprises: solidification value is room temperature to 100 DEG C, and set time is 2-24 hour.
8. method according to claim 1, wherein, described adobe is rectangular parallelepiped or square, and the length and width of described adobe and high ratio are 1-10: 1-5: 1.
9. with the fragment of brick that the composition containing mud and building waste is made, it is characterized in that, this fragment of brick is obtained by the method in claim 1-8 described in any one.
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|---|---|---|---|
| CN201110159511.4A CN102826796B (en) | 2011-06-14 | 2011-06-14 | Fragment of brick made with the composition containing mud and building waste and preparation method thereof |
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| CN201110159511.4A CN102826796B (en) | 2011-06-14 | 2011-06-14 | Fragment of brick made with the composition containing mud and building waste and preparation method thereof |
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| CN102826796B true CN102826796B (en) | 2016-04-27 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992090B (en) * | 2013-02-18 | 2015-11-25 | 晋江市闽亿再生资源有限公司 | A kind of environment-friendly baking-free bricks and preparation method thereof |
| CN106830860B (en) * | 2017-01-18 | 2018-11-23 | 邵阳市仲鹏实业有限公司 | A kind of environmental protection brick and preparation method thereof using building waste preparation |
| CN108285312B (en) * | 2018-04-02 | 2020-11-06 | 中钢集团马鞍山矿山研究院有限公司 | Resource utilization method of zinc hydrometallurgy jarosite slag and sewage treatment sludge |
| CN108439877B (en) * | 2018-04-02 | 2021-03-09 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for preparing solid bricks from solid waste generated in zinc hydrometallurgy |
| CN116253485A (en) * | 2023-03-07 | 2023-06-13 | 腾达建设集团股份有限公司 | Integrated treatment method for shield mud |
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| JP5091519B2 (en) * | 2007-03-28 | 2012-12-05 | 公益財団法人鉄道総合技術研究所 | Geopolymer composition and method for producing the same |
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| CN101113090A (en) * | 2007-07-22 | 2008-01-30 | 罗健泉 | Method for producing baking-free brick without odour and three-waste by using sewage plant sludge |
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