CN1850701A - Environment-protective building waste-material dry-mixed sand slurry and its preparing method - Google Patents
Environment-protective building waste-material dry-mixed sand slurry and its preparing method Download PDFInfo
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- CN1850701A CN1850701A CNA2006100191273A CN200610019127A CN1850701A CN 1850701 A CN1850701 A CN 1850701A CN A2006100191273 A CNA2006100191273 A CN A2006100191273A CN 200610019127 A CN200610019127 A CN 200610019127A CN 1850701 A CN1850701 A CN 1850701A
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- Prior art keywords
- discarded concrete
- flyash
- gelling material
- phosphogypsum
- cement
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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 invention relates to a building waste dry-mixed mortar and the preparing method, characterized in that it is prepared mainly of waste concrete gelled material 100 weight shares, fly ash 1-40 weight shares, phosphorous plaster 1-5 weight shares and cement 0-5 weight shares, where the waste concrete gelled material is made by the following process: burning crushed waste concrete blocks at 540-570 deg.C for 0.5-1 h, making frictional separation on the burnt waste concrete blocks by mechanical force, and screening by 4.75 mm sieve mesh so that the screening is the waste concrete gelled material. And it has obvious economic and environmental benefits and is a low-cost ecological environmental- protection building material.
Description
Technical field
The present invention relates to a kind of building waste-material dry-mixed sand slurry and preparation method thereof.
Background technology
Produced a large amount of discarded concretes in recent years in the maintenance of various engineering structures and old building, demolishing process, how handling these discarded concretes has become a problem that urgently will solve.Meanwhile, be used to produce concrete natural resource and be tending towards shortage, produce high-quality material of construction and will cause increasing the weight of day by day of carrying capacity of environment.Therefore, reclaim high-quality regeneration aggregate or mortar from discarded concrete, the instead of part natural resources is produced material of construction, is to protect national resource, and improves environment, advances an important channel of Sustainable development.
At present, extensively carried out the work of discarded concrete regeneration both at home and abroad, for example the fragmentation of building castoff concrete is made the regenerated coarse aggregate of certain particle diameter, can substitute the natural aggregate of part, be applied to the bed course of high-grade highway, soft soil roadbed stable component, the aspects such as slop protection material of steady basic unit of water and highway, river levee.In addition, also regeneration aggregate is used to make plastics products for building such as building block, Paving bricks, lattice brick.
But prepare in the shattering process of regenerated aggregate at discarded concrete, people also do not carry out the rational and effective utilization to a large amount of fine particles that produce.These tiny particles exist characteristics such as surface irregularity, porosity height, intensity are low, water-intake rate height, have influenced the characteristic of raw product again, thereby usually are considered to not have the waste material of utility value and abandon.Studies show that the mortar small-particle that produces in the discarded concrete shattering process accounts for 15% of discarded concrete total amount.The waste concrete that the present annual construction of China produces has more than 100,000,000 tons approximately, will produce a large amount of fine powders in the regeneration process, this part resource abandon the waste that certainly will cause second environmental pollution and resource.
Summary of the invention
The object of the present invention is to provide a kind of intensity height, environment-protective building waste-material dry-mixed sand slurry with low cost and preparation method thereof.
To achieve these goals, technical scheme of the present invention is: a kind of environment-protective building waste-material dry-mixed sand slurry, it is characterized in that it mainly is prepared from by discarded concrete gelling material, flyash, phosphogypsum and cement raw material, the shared parts by weight of each component are: 100 parts of discarded concrete gelling material, flyash 1-40 part, phosphogypsum 1-5 part, cement 0-5 part; The discarded concrete gelling material is 540-570 ℃ of calcining 0.5-1 hour with the waste concrete block after the fragmentation, carry out mechanical force friction separation to calcining heat treated waste concrete block, sieve through the 4.75mm screen cloth, minus mesh is the discarded concrete gelling material.
The shared parts by weight of described cement raw material are: 1-5 part.
The preparation method of above-mentioned a kind of environment-protective building waste-material dry-mixed sand slurry is characterized in that it comprises the steps:
1), the preparation of discarded concrete gelling material: the waste concrete block after the fragmentation was calcined 0.5-1 hour at 540-570 ℃, carry out mechanical force friction separation to calcining heat treated waste concrete block, sieve through the 4.75mm screen cloth, minus mesh is the discarded concrete gelling material;
2), be: 100 parts of discarded concrete gelling material by the shared parts by weight of each component, flyash 1-40 part, phosphogypsum 1-5 part, cement 0-5 part is chosen discarded concrete gelling material, flyash, phosphogypsum and cement raw material, with discarded concrete gelling material, flyash, phosphogypsum and cement mix product.Product strength rate range 5-18Mpa, mean density 1.9g/cm
3
The natural aggregate that described friction is separated into calcining heat treated waste concrete block and particle diameter 20mm mixes by 1: 1 mass ratio, places circular cylinder body (as ball mill) grinding 10-20 minute of rotation, passes through the 4.75mm screen cloth and sieves.
Described natural aggregate is basalt or a Wingdale hard, wear-resistant light.
The present invention adopts the waste concrete block after the fragmentation to calcine 0.5-1 hour at 540-570 ℃, makes the discarded concrete activation; Discarded concrete reduces the cohesive strength of gathering materials with hydrated cement paste on the one hand in heat-processed, be easy to make separating of former gather materials phase and mortar phase; Slough the part combination water of cement slurry in the discarded concrete on the other hand, generate Ca
2SiO
4, dehydrations such as CaO and multiple unformed material mutually, it has the rehydration activity, and can excite flyash to participate in hydration reaction.
Discover that this (discarded concrete gelling material, flyash, phosphogypsum and cement) mixes can obtain higher material mechanical performance.Because the activation bonding component phase (hydrate dehydration phase) that calcination processing obtains has certain rehydration ability, and the relative flyash of this dehydration has excitation.In addition, phosphogypsum also can be used as the sulphate activation agent of flyash and the retardant of dehydration phase aquation.Therefore, the activity of mixing back flyash by proper proportion is fully excited, and can obtain higher mortar final strength.Contain a large amount of active SiO in the flyash
2, Al
2O
3, the Ca (OH) of activation bonding component and water effect generation
2Constantly be diffused into the vitreous surface of flyash, generate hydrated calcium silicate with hydraulic gelling property and drated calcium aluminate etc.A certain amount of phosphogypsum mix the serviceability of having improved mixture, make dry-mixed mortar be unlikely to snap cure, and phosphogypsum and Ca (OH)
2Effect generates compounds such as ettringite, has improved the interface structure of slurry and sand grains, has improved middle and later periods intensity.
By systematic testing research, measure test specimen 3d respectively, 7d, the mechanical strength performance of 28d, cement mixing content is brought up to amplitude that 0.1 o'clock intensity improves and little from 0.05 as can be seen from Table 1, and single group ultimate compression strength maximum value results from cement mixing content and only is 5% o'clock of activation bonding component phase quality, promptly the 5th group.The final ultimate compression strength mean value of three groups of samples that does not mix cement has as can be seen from Table 2 fully also surpassed 5MPa.When the angle that reduces material cost and pursue the best price/performance ratio is adjusted proportioning, cement mixing content can be defined as the concrete powder quality 5% in addition still less.
The present invention mix a spot of cement or fully not water mixing mud can obtain the dry-mixed mortar material of different intensity grades, main raw material(s) is building and industrial solid castoff, and material cost is cheap, can absorb industry byproduct and rejected material in a large number, economic benefit is obvious, and environmental benefit is obvious; Have lightweight, high-strength, workability good, the characteristics easily of constructing, and is a kind of material of construction of ecological, environmental protective cheaply.This product (a kind of environment-protective building waste-material dry-mixed sand slurry) is a kind of building mortar, is mainly used in building build field, is the important consolidating material of blockwork moulding.
Description of drawings
Fig. 1 is preparation technology's schema of the present invention
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
A kind of environment-protective building waste-material dry-mixed sand slurry, it is mainly formed by discarded concrete gelling material, flyash and phosphogypsum feedstock production, and the shared parts by weight of each component are: 100 parts of discarded concrete gelling material, 1 part in flyash, 1 part of phosphogypsum.
The preparation method of above-mentioned a kind of environment-protective building waste-material dry-mixed sand slurry, it comprises the steps:
1), the preparation of discarded concrete gelling material: the waste concrete block after the fragmentation was calcined 0.5-1 hour 540-570 ℃ (optimum temps is 550 ℃), carry out mechanical force friction separation to calcining heat treated waste concrete block, the natural aggregate of calcining heat treated waste concrete block and particle diameter 20mm mixes by 1: 1 mass ratio, described natural aggregate is hard, the basalt of wear-resistant light or Wingdale, place the circular cylinder body (as ball mill) of rotation to grind 10-20 minute, sieve through the 4.75mm screen cloth, minus mesh is the discarded concrete gelling material;
2), be: 100 parts of discarded concrete gelling material by the shared parts by weight of each component, 1 part in flyash, phosphogypsum is chosen discarded concrete gelling material, flyash and phosphogypsum raw material for 1 part, with discarded concrete gelling material, flyash and phosphogypsum mix product.
Embodiment 2:
A kind of environment-protective building waste-material dry-mixed sand slurry, it is mainly formed by discarded concrete gelling material, flyash and phosphogypsum feedstock production, and the shared parts by weight of each component are: 100 parts of discarded concrete gelling material, 10 parts in flyash, 2 parts of phosphogypsums.
Its preparation method is with embodiment 1.
Embodiment 3:
A kind of environment-protective building waste-material dry-mixed sand slurry, it is mainly formed by discarded concrete gelling material, flyash and phosphogypsum feedstock production, and the shared parts by weight of each component are: 100 parts of discarded concrete gelling material, 40 parts in flyash, 5 parts of phosphogypsums.
Its preparation method is with embodiment 1.
Embodiment 4:
A kind of environment-protective building waste-material dry-mixed sand slurry, it mainly is prepared from by discarded concrete gelling material, flyash, phosphogypsum and cement raw material, and the shared parts by weight of each component are: 100 parts of discarded concrete gelling material, 1 part in flyash, 1 part of phosphogypsum, 1 part of cement.Phosphogypsum and flyash are dry phosphogypsum and the flyash of crossing, and cement is 42.5
#Ordinary Portland cement.
The preparation method of above-mentioned a kind of environment-protective building waste-material dry-mixed sand slurry, it comprises the steps:
1), the preparation of discarded concrete gelling material: the waste concrete block after the fragmentation was calcined 0.5-1 hour 540-570 ℃ (optimum temps is 550 ℃), carry out mechanical force friction separation to calcining heat treated waste concrete block, the natural aggregate of calcining heat treated waste concrete block and particle diameter 20mm mixes by 1: 1 mass ratio, described natural aggregate is hard, the basalt of wear-resistant light or Wingdale, place the circular cylinder body (as ball mill) of rotation to grind 10-20 minute, sieve through the 4.75mm screen cloth, minus mesh is the discarded concrete gelling material;
2), be: 100 parts of discarded concrete gelling material by the shared parts by weight of each component, 1 part in flyash, 1 part of phosphogypsum, cement is chosen discarded concrete gelling material, flyash, phosphogypsum and cement raw material for 1 part, with discarded concrete gelling material, flyash, phosphogypsum and cement mix product.
Embodiment 5:
A kind of environment-protective building waste-material dry-mixed sand slurry, it mainly is prepared from by discarded concrete gelling material, flyash, phosphogypsum and cement raw material, and the shared parts by weight of each component are: 100 parts of discarded concrete gelling material, 40 parts in flyash, 5 parts of phosphogypsums, 5 parts of cement.
Its preparation method is with embodiment 4.
Embodiment 6:
A kind of environment-protective building waste-material dry-mixed sand slurry, it mainly is prepared from by discarded concrete gelling material, flyash, phosphogypsum and cement raw material, and the shared parts by weight of each component are: 100 parts of discarded concrete gelling material, 20 parts in flyash, 2 parts of phosphogypsums, 2 parts of cement.
Its preparation method is with embodiment 4.
The selective value (parts by weight) that discarded concrete gelling material, flyash, phosphogypsum and cement raw material are different obtains varying strength by above-mentioned preparation method, sees Table 1, table 2, table 3.
7 days intensity levels of table 1 orthogonal test
| Sequence number | Water-solid ratio | The discarded concrete gelling material | Cement | Flyash | Phosphogypsum | Folding strength (MPa) | Ultimate compression strength (MPa) |
| 1 2 3 4 5 6 7 8 9 | 0.26 0.25 0.28 0.23 0.22 0.23 0.22 0.24 0.23 | 1 1 1 1 1 1 1 1 1 | 0.00 0.00 0.00 0.05 0.05 0.05 0.10 0.10 0.10 | 0.00 0.20 0.40 0.00 0.20 0.40 0.00 0.20 0.40 | 0.01 0.02 0.03 0.02 0.03 0.01 0.03 0.01 0.02 | 1.6 2.1 1.4 3.0 3.4 2.8 4.3 3.2 2.8 | 4.3 8.4 8.2 7.6 14.7 12.2 13.7 12.2 14.1 |
28 days intensity levels of table 2 orthogonal test
| Sequence number | Water-solid ratio | The discarded concrete gelling material | Cement | Flyash | Phosphogypsum | Folding strength (MPa) | Ultimate compression strength (MPa) |
| 1 2 3 4 5 6 7 8 9 | 0.26 0.25 0.28 0.23 0.22 0.23 0.22 0.24 0.23 | 1 1 1 1 1 1 1 1 1 | 0.00 0.00 0.00 0.05 0.05 0.05 0.10 0.10 0.10 | 0.00 0.20 0.40 0.00 0.20 0.40 0.00 0.20 0.40 | 0.01 0.02 0.03 0.02 0.03 0.01 0.03 0.01 0.02 | 1.7 3.7 2.3 3.0 4.4 3.0 4.0 4.3 4.9 | 4.7 10.7 9.7 8.7 18.4 15.7 17.6 17.7 21.9 |
Proportioning of table 3 Three Estate (weight part) and intensity level
| Grade | Water consumption | The discarded concrete gelling material | Cement | Flyash | Phosphogypsum | Folding strength (MPa) | Ultimate compression strength (MPa) |
| M5 M10 M15 | 0.23 0.23 0.22 | 1 1 1 | 0.05 0.05 0.05 | 0.00 0.40 0.20 | 0.02 0.01 0.03 | 3.0 3.0 4.4 | 8.7 15.7 18.4 |
Claims (4)
1. environment-protective building waste-material dry-mixed sand slurry, it is characterized in that it mainly is prepared from by discarded concrete gelling material, flyash, phosphogypsum and cement raw material, the shared parts by weight of each component are: 100 parts of discarded concrete gelling material, flyash 1-40 part, phosphogypsum 1-5 part, cement 0-5 part; The discarded concrete gelling material is 540-570 ℃ of calcining 0.5-1 hour with the waste concrete block after the fragmentation, carry out mechanical force friction separation to calcining heat treated waste concrete block, sieve through the 4.75mm screen cloth, minus mesh is the discarded concrete gelling material.
2. a kind of environment-protective building waste-material dry-mixed sand slurry according to claim 1 is characterized in that: the shared parts by weight of described cement raw material are: 1-5 part.
3. the preparation method of a kind of environment-protective building waste-material dry-mixed sand slurry as claimed in claim 1 is characterized in that it comprises the steps:
1), the preparation of discarded concrete gelling material: the waste concrete block after the fragmentation was calcined 0.5-1 hour at 540-570 ℃, carry out mechanical force friction separation to calcining heat treated waste concrete block, sieve through the 4.75mm screen cloth, minus mesh is the discarded concrete gelling material;
2), be: 100 parts of discarded concrete gelling material by the shared parts by weight of each component, flyash 1-40 part, phosphogypsum 1-5 part, cement 0-5 part is chosen discarded concrete gelling material, flyash, phosphogypsum and cement raw material, with discarded concrete gelling material, flyash, phosphogypsum and cement mix product.
4. the preparation method of a kind of environment-protective building waste-material dry-mixed sand slurry according to claim 1, it is characterized in that natural aggregate that described friction is separated into calcining heat treated waste concrete block and particle diameter 20mm mixes by 1: 1 mass ratio, place the circular cylinder body of rotation to grind 10-20 minute, sieve through the 4.75mm screen cloth.
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| CN101811848A (en) * | 2010-03-04 | 2010-08-25 | 彭昊 | Process for producing recycled dry-mixed mortar |
| CN101913804A (en) * | 2010-07-23 | 2010-12-15 | 邵阳市宝鑫高科新材开发有限公司 | Dry-mixed mortar material and preparation method thereof |
| CN101948280A (en) * | 2010-10-22 | 2011-01-19 | 山东建筑大学 | Method for preparing building mortar from waste concrete |
| CN101665369B (en) * | 2009-09-27 | 2011-11-09 | 山东建筑大学 | Comprehensive utilization method of waste concrete |
| CN101830682B (en) * | 2010-05-14 | 2012-09-05 | 武汉理工大学 | Plastering mortar prepared by using construction wastes and phosphogypsum |
| CN101691047B (en) * | 2009-09-01 | 2012-12-26 | 中国环境科学研究院 | Preparation method of electrolytic manganese slag autoclaved brick |
| CN106565165A (en) * | 2016-11-02 | 2017-04-19 | 墨宝股份有限公司 | Method of producing building mortar from waste concrete |
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| CN111747701A (en) * | 2020-05-28 | 2020-10-09 | 山西佳维新材料股份有限公司 | Premixed dry-mixed mortar and application thereof |
| CN114195440A (en) * | 2021-12-28 | 2022-03-18 | 武汉车都环保再生资源有限公司 | Method for preparing recycled material based on construction waste |
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| CN101665369B (en) * | 2009-09-27 | 2011-11-09 | 山东建筑大学 | Comprehensive utilization method of waste concrete |
| CN101811848A (en) * | 2010-03-04 | 2010-08-25 | 彭昊 | Process for producing recycled dry-mixed mortar |
| CN101830682B (en) * | 2010-05-14 | 2012-09-05 | 武汉理工大学 | Plastering mortar prepared by using construction wastes and phosphogypsum |
| CN101913804B (en) * | 2010-07-23 | 2012-10-03 | 邵阳市宝鑫高科新材开发有限公司 | Dry-mixed mortar material and preparation method thereof |
| CN101913804A (en) * | 2010-07-23 | 2010-12-15 | 邵阳市宝鑫高科新材开发有限公司 | Dry-mixed mortar material and preparation method thereof |
| CN101948280A (en) * | 2010-10-22 | 2011-01-19 | 山东建筑大学 | Method for preparing building mortar from waste concrete |
| CN106565165A (en) * | 2016-11-02 | 2017-04-19 | 墨宝股份有限公司 | Method of producing building mortar from waste concrete |
| CN107235646A (en) * | 2017-05-23 | 2017-10-10 | 贵州师范大学 | Concrete regenerating powder microdilatancy eco-cement and preparation method thereof |
| CN109574182A (en) * | 2019-01-24 | 2019-04-05 | 长江师范学院 | A kind of preparation method of acid waste water neutralizer |
| CN109574182B (en) * | 2019-01-24 | 2021-06-15 | 长江师范学院 | Preparation method of acid wastewater neutralizer |
| CN111747701A (en) * | 2020-05-28 | 2020-10-09 | 山西佳维新材料股份有限公司 | Premixed dry-mixed mortar and application thereof |
| CN114195440A (en) * | 2021-12-28 | 2022-03-18 | 武汉车都环保再生资源有限公司 | Method for preparing recycled material based on construction waste |
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