CN110482928A - It is a kind of using recycled fine aggregate as self-repair concrete of carrier and preparation method thereof - Google Patents
It is a kind of using recycled fine aggregate as self-repair concrete of carrier and preparation method thereof Download PDFInfo
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- CN110482928A CN110482928A CN201910693055.8A CN201910693055A CN110482928A CN 110482928 A CN110482928 A CN 110482928A CN 201910693055 A CN201910693055 A CN 201910693055A CN 110482928 A CN110482928 A CN 110482928A
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- fine aggregate
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- 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 discloses a kind of using recycled fine aggregate as self-repair concrete of carrier and preparation method thereof, the self-repair concrete includes concrete batching and selfreparing recycled fine aggregate, by volume percentage, selfreparing recycled fine aggregate accounts for the 5%~25% of self-repair concrete；The selfreparing recycled fine aggregate is made of recycled fine aggregate dipping Bacillus pasteurii bacterium solution；The OD value 1.2~1.8 of Bacillus pasteurii bacterium solution, using the cement in concrete as calculating benchmark, the volume volume of Bacillus pasteurii bacterium solution is 25%.The present invention uses recycled fine aggregate carrier, when solving in the past using other carriers, the problem that carrier mechanical strength is low, microbial activity conservation degree is poor, inconvenient equally plays the good effect of concrete structure performance of construction refuse resource, microorganism selfreparing.
Description
Technical field
It is especially a kind of to review one's lessons by oneself compound using recycled fine aggregate as carrier the invention belongs to special construction material technical field
Solidifying soil and preparation method thereof.
Background technique
It is largely old to build with the continuous quickening of Chinese Urbanization scale and quickly propelling for building Socialist New
Build object dismounting will generate numerous concrete, brick, watt etc. wastes.According to the portion's of building statistics is lived, will be created to the year two thousand twenty China
30,000,000,000 square metres of house, resulting building castoff is up to 5,000,000,000 tons.China's concrete industry year consumes sandstone simultaneously
About 15,000,000,000 tons/year, about 2,000,000,000 tons/year of cement are consumed, if things go on like this China's ecological environment will can't bear the heavy load.It is conventionally employed at present
The mode of burial handle abandoned building to occupy it is a large amount of bury rubbish land used, can also bring it is a series of about natural environment,
The problems such as energy, resource, sustainable development.Building waste is turned waste into wealth at that time, it will be the emphasis research and development that rubbish recycles
Project.It discarded mixed building is processed into recycled fine aggregate is used for the preparation of regeneration concrete and not only solve environmental pollution and ask
Topic, also achieves resource reutilization, reduces the waste of resource and the energy.
Recycled fine aggregate is by recycled concrete aggregate after the treatment process such as broken, cleaning, screening, and obtained partial size is
The aggregate of 0~5mm is the product formed after natural aggregate is condensed with cement base aquation.Wherein, recycled fine aggregate is in shattering process
In by biggish external force, be easy to appear a large amount of fine slight cracks in the inside that gathers materials, loose porous state is revealed in inside.Institute
Having it as enhancing cement base microbe self-repair concrete carrier using the microscopic spaces structure that recycled fine aggregate has has
Certain feasibility, while being its higher matrix strength energy of carrier compared to regeneration brick aggregate under same partial size and expanded perlite
The mechanical property and waterproof impervious characteristic for making self-repair concrete are significantly improved.
Micro-organisms bacillus can generate someization by certain calcium mineralising reaction mechanism at cell gemma in nature
Object is closed, so that cramming or cohering contact water oxygen has a hole medium interface.These later substances are proved to be some different shapes
Calcium carbonate and class calcium carbonate inorganic compound, these processes control deposition process by thallus completely independent of environment.It is suitable when having
Calcium mineralization is carried out when the environment of conjunction, and suspend mode is carried out when being unsatisfactory for reaction condition.Most microorganisms are not mainly with
Calcium carbonate is deposited with form, the deposition process is larger by such environmental effects and is not related to special structural form.Due to coagulation
The main component of soil is substantially exactly calcium salt, therefore using the ability of this calcium carbonate induction and deposition of micro-organisms bacillus to mixed
Solidifying soil cracking seam carries out selfreparing and has feasibility, and bacillus has more efficient reparation efficiency to make to regenerate in alkaline environment
Fine aggregate has specific carrier advantage.
Micro-organisms bacillus, which mainly passes through, forms precipitation of calcium carbonate realization reparation at gemma under aerobic environment.Along with carbon
Transformation (the CO of hydrochlorate balance2To HCO3 -And CO3 2-), the calcium ion in concrete medium reacts with carbanion, thus
Assemble to form insoluble calcium carbonate CaCO to microbial spores3Deposit makes crack self-healing and achievees the purpose that reparation.Its
Mineralization process is that aerobic respiration metabolism substrate generates CO2, with the OH in solution-Reaction generates HCO3 -, then under alkaline condition
With the Ca in cement slurry2+The reaction was continued generates CaCO3Crystal.
Summary of the invention
The purpose of the present invention is to provide a kind of using recycled fine aggregate as the self-repair concrete of carrier, bioactivity height,
Structure durability is good, good in economic efficiency.
Another object of the present invention is to provide a kind of using recycled fine aggregate as the preparation side of the self-repair concrete of carrier
Method, to obtain the microorganism self-repair concrete that bioactivity is high, structure durability is good, good in economic efficiency, easy to operate.
The technical solution for realizing the aim of the invention is as follows:
It is a kind of using recycled fine aggregate as the self-repair concrete of carrier, the self-repair concrete includes concrete batching
With selfreparing recycled fine aggregate, by volume percentage, selfreparing recycled fine aggregate accounts for the 5%~25% of self-repair concrete；
The selfreparing recycled fine aggregate is made of recycled fine aggregate dipping Bacillus pasteurii bacterium solution；Bacillus pasteurii bacterium solution
OD value 1.2~1.8, using the cement in concrete as calculating benchmark, the volume volume of Bacillus pasteurii bacterium solution is 25%.
Optionally, by volume percentage, selfreparing recycled fine aggregate accounts for the 15% of self-repair concrete.
Optionally, the process of recycled fine aggregate dipping Bacillus pasteurii bacterium solution are as follows: negative pressure of vacuum 0.5Mpa item
Dipping absorption 20min under part.
Optionally, the recycled fine aggregate is the metaling that concrete construction rubbish is formed after crushing；It is described again
It is 0~5mm, apparent density 2518kg/m that raw fine aggregate, which is partial size,3, bulk density 1255kg/m3, porosity 56%, crush index
It is 14.5%, robustness 7.8%, moisture content 1.08%, 24 hours water absorption rates are 8.91%.
Optionally, it counts in mass ratio, the concrete batching is water: sand: stone: cement=0.3~0.6:3.10~
3.5:1.60~2.00:1.00~1.50.
Optionally, the cement is 42.5 grades of PO, density 3100kg/m3；The apparent density of the sand is
2724.8kg/m3, water absorption rate 1.02%, fineness modulus 2.18；The apparent density of the natural rubble is 2801.8kg/m3,
Water absorption rate is 0.47%, crush index 5.99.
It is a kind of using recycled fine aggregate as the preparation method of the self-repair concrete of carrier, the self-repair concrete includes
Concrete and selfreparing recycled fine aggregate, by volume percentage, selfreparing recycled fine aggregate account for self-repair concrete 5%~
25%；The selfreparing recycled fine aggregate is made of recycled fine aggregate dipping Bacillus pasteurii bacterium solution, recycled fine aggregate leaching
The process of stain Bacillus pasteurii bacterium solution are as follows: dipping absorption 20min under the conditions of negative pressure of vacuum 0.5Mpa；Bacillus pasteurii bacterium solution
OD value 1.2~1.8；Using the cement in concrete as calculating benchmark, the volume volume of Bacillus pasteurii bacterium solution is 25%；It will
Concrete batching is mixed with selfreparing recycled fine aggregate to be mixed and stirred up to self-repair concrete.
Optionally, by volume percentage, selfreparing recycled fine aggregate accounts for the 15% of self-repair concrete.
Optionally, it counts in mass ratio, the concrete batching is water: sand: stone: cement=0.3~0.6:3.10~
3.5:1.60~2.00:1.00~1.50；
The cement is 42.5 grades of PO, density 3100kg/m3；The apparent density of the sand is 2724.8kg/m3, inhale
Water rate is 1.02%, fineness modulus 2.18；The apparent density of the natural rubble is 2801.8kg/m3, water absorption rate is
0.47%, crush index 5.99.
Optionally, the recycled fine aggregate is the metaling that concrete construction rubbish is formed after crushing；
The partial size of the recycled fine aggregate is 0~5mm, apparent density 2518kg/m3, bulk density 1255kg/m3, hole
Gap rate 56%, crush index 14.5%, robustness 7.8%, moisture content 1.08%, 24 hours water absorption rates are 8.91%.
Advantages of the present invention are as follows:
The present invention, as carrier, compares other carriers using recycled fine aggregate, and carrier preparation is simple, intensity is high, micro- life
Object activity keeps preferable, easy to operate, while realizing building waste and turn waste into wealth, and also improves the mechanical property of concrete structure
Energy and impervious, the effect of enhancing cement base selfreparing efficiency.And also give the ability of concrete damage selfreparing, In
Just voluntarily effectively being repaired occurs in the initial stage of distress in concrete, and greatly reduces big caused by the reparation of crack developing later period
Amount expense greatly increases safety, economy and the durability of concrete structure.
The present invention is described in further detail With reference to embodiment.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is embodiment one, two and three using recycled fine aggregate as the self-repair concrete 28d average crack reparation of carrier
Width versus figure；
Fig. 2 is that embodiment one is repaired by the self-repair concrete 0d (left side) of carrier and (right side) crack 28d of recycled fine aggregate
Effect contrast figure；
Fig. 3 is that embodiment two is repaired by the self-repair concrete 0d (left side) of carrier and (right side) crack 28d of recycled fine aggregate
Effect contrast figure；
Fig. 4 is that embodiment three is repaired by the self-repair concrete 0d (left side) of carrier and (right side) crack 28d of recycled fine aggregate
Effect contrast figure；
Fig. 5 is that embodiment one, two and three is apparent as the self-repair concrete crack occurrence form of carrier using recycled fine aggregate
Figure；
Fig. 6 is 10000 times of electron microscope pictures of reparation product of embodiment one.
Specific embodiment
Recycled fine aggregate is process by the concrete rubbish in building castoff, and the partial size for concrete batching is not
Particle greater than 5mm.The concrete particle of the main surface attachment cement slurry formed after broken including discarded concrete, Behavior of Hardened Cement Paste
Particle and a small amount of broken stone.The production process of recycled fine aggregate are as follows: primary election is carried out to raw material, classification stacks, removes reinforcing bar
Deng；By repeatedly sorting, removal soil, light materials, reinforcing bar, organic matter etc.；Primary crushing, screening, second-time breakage, screening, separation,
Flushing etc. obtains recycled fine aggregate.
The recycled fine aggregate that the present invention uses is derived from concrete construction rubbish, is that natural aggregate and cement base aquation condense
The building stones that the product formed afterwards is formed after crushing.There are a little part of cement package, rough surface in its surface of recycled fine aggregate, interior
Portion makes it in the performances such as intensity, water absorption rate lower than natural fine aggregate, index is as follows: regenerating thin bone there are microscopic spaces
It is 0~5mm, apparent density 2518kg/m that material, which is partial size,3, bulk density 1255kg/m3, porosity 56%, crush index is
14.5%, robustness 7.8%, moisture content 1.08%, 24 hours water absorption rates are 8.91%.Because recycled fine aggregate had been crushed
By biggish external force in journey, a large amount of fine slight cracks are easy to appear in the inside that gathers materials, the state of microscopic spaces is revealed in inside.
Therefore the microscopic spaces structure inside recycled fine aggregate has it as enhancing cement base microbe self-repair concrete carrier tool
There is feasibility, while compared to its higher matrix strength can make selfreparing coagulation using expanded perlite or regeneration brick aggregate as carrier
The properties of soil are significantly improved.
Product and method in order to enable those skilled in the art to better understand the present invention, illustrate to prepare with embodiment below
Journey.Simultaneously compared with comparative example, to illustrate advantages of the present invention.
Concrete batching common in tradition or industry is mixed with selfreparing recycled fine aggregate and carries out selfreparing by the present invention
The preparation of concrete, common concrete batching is generally water, cement, sand, stone, the ingredient of the concrete in tradition or industry
Than for 0.40:3.15:1.69:1.00.
As calculating benchmark, the volume volume of Bacillus pasteurii bacterium solution is cement mentioned in the present invention using in concrete
25%.Being primarily due to the ratio of mud is the principal element for influencing concrete performance, and being subject to cement consumption can be accurately preferable
Reduce the preparation error of concrete performance；Bacterium solution volume volume be 25% based on lot of experimental data analysis obtain its for take into account through
Ji property and the optimum volume ratio for repairing efficiency.
If not otherwise specified, the equipment that the present invention uses is this field conventional equipment.
If not otherwise specified, the material that the present invention uses is commercially available.
Embodiment one:
It is a kind of using recycled fine aggregate as the production method of the self-repair concrete of carrier, comprising steps of
Step 1: recycled fine aggregate is derived from the civilian and commercial building dismantling concrete rubbish of conventional construction, first artificially removes it
In the impurity such as glass, timber, fiber, plastics, reinforcing bar, then by jaw crushing crusher machine, screening process, finally by its people
Work filters out dipping of the recycled aggregate as recycled fine aggregate, for microorganism that particle size range is 0~5mm；
Step 2: above-mentioned recycled fine aggregate carrier is obtained into selfreparing using immersion way dipping microbial inoculum is vacuumized
Recycled fine aggregate；Purchased from the Bacillus pasteurii bacterium solution of Shaanxi Institute of Microbiology, the OD value of Bacillus pasteurii bacterium solution is
1.6, after 0~-4 DEG C of low temperature are placed 12 hours, first takes bacterium solution to be placed in negative-pressure vacuum pump, add recycled fine aggregate carrier and vibrate and shake
The even more uniform distribution that is allowed to adsorbs 20min, transfer regenerates thin bone on recycled aggregate surface under the conditions of negative pressure of vacuum is 0.5Mpa
Expect that drying to constant weight in 40 DEG C of 12~16h of drying of constant temperature in baking oven, i.e., the weight difference that drying front and back weighs twice is no more than 2mg
.The fluid nutrient medium of microbial inoculum is mixed by organic protein with sodium carbonate liquor and sodium bicarbonate solution,
The mass ratio of middle sodium carbonate liquor and sodium bicarbonate solution and organic protein is 10%~18%, the Baume degrees of sodium carbonate liquor
For 25 to 40 ° of B é.
Step 3: water, sand, stone and the cement that design concrete mix is 0.40:3.15:1.69:1.00.By volume hundred
Divide than meter, selfreparing recycled fine aggregate volume volume is the 15% of total self-repair concrete volume, is with the cement in concrete
Calculating benchmark, the volume volume of Bacillus pasteurii bacterium solution are 25%.The adding method of recycled fine aggregate particle is in concrete
It is added when stirring, concrete component uses self-compacting concrete.
Step 4: pouring the concrete to concrete component by designed match ratio, and conserve molding, then manufacture
Repairing effect is observed in crack.Wherein, preparation method is that machine stirring prepares self-repair concrete, and stands after specimen molding
Preset cracks after 7d are conserved under the conditions of 85 ± 5%RH and 22 ± 2 DEG C after 48h demoulding；Test specimen is adopted through electronic-hydraulic servo pressure testing machine
Preset cracks are loaded with line-of-sight course, specific method is to debug press machine to load with the rate of 0.05mm/min, when the tension of test specimen
There is the crack 0.1~0.3mm and stops loading and unloading after holding lotus 90s in side bottom；Test specimen sprinkling maintenance simultaneously passes through
150X crack observer and electronic scanner microscope measure repairing performance.
Cement is 42.5 grades of PO, density 3100kg/m3；Recycled fine aggregate is that partial size is 0~5mm, apparent density
2518kg/m3, bulk density 1255kg/m3, porosity 56%, crush index 14.5%, robustness 7.8%, moisture content is
1.08%, 24 hours water absorption rates are 8.91%.The apparent density of sand is 2724.8kg/m3, water absorption rate 1.02%, fineness modulus
It is 2.18；The apparent density of natural rubble is 2801.8kg/m3, water absorption rate 0.47%, crush index 5.99.
As shown in Fig. 2, 28d is almost complete to repair state as a result, it has been found that the embodiment crack repairing effect is preferable.
As shown in fig. 6, repairing substance CaCO3More uniform regular polygon crystal is presented, it is viscous with tiling or stacking form
At fine aggregate and mortar hole, this can effectively improve the corrosion resistance in crack occurrence face and promote crack after repair knot
The homogenieity at place.
Embodiment two:
Self-repair concrete of the recycled fine aggregate of this implementation column for carrier, quality mixture ratio 0.40:3.15:
Water, sand, stone and the cement of 1.69:1.00.
Recycled fine aggregate is that the preparation method of the self-repair concrete of carrier is the same as example 1 in the embodiment, different
Place is that recycled fine aggregate volume volume is taken to account for the 5% of the total volume of concrete of selfreparing as carrier.
As shown in figure 3, comparative example one, it is found that the embodiment crack repairing effect is unobvious, 28d repairing effect one
As.
Embodiment three:
Self-repair concrete of the recycled fine aggregate of this implementation column for carrier, quality mixture ratio 0.40:3.15:
Water, sand, stone and the cement of 1.69:1.00.
Recycled fine aggregate is that the preparation method of the self-repair concrete of carrier is the same as example 1 in the embodiment, different
Place is that recycled fine aggregate volume volume is taken to account for the 25% of the total volume of concrete of selfreparing as carrier.
As shown in figure 4, comparative example one, two finds that the embodiment crack repairing effect is good, 28d repairing effect is slightly lower
In embodiment one, but it is better than embodiment two.
As shown in Figure 1,5%, 15% and 25% volume volume recycled fine aggregate of comparison repairs situation, it is thus found that volume is mixed
Amount is outstanding for 15% self-repair concrete repairing effect.
As shown in figure 5, the crack occurrence form of the test specimen of 5%, 15% and 25% volume volume of comparison is different.
Table 1 is using recycled fine aggregate as the self-repair concrete fracture width comparison diagram of carrier
As shown in table 1, the self-repair concrete in above-described embodiment one is good in same time internal fissure reparation degree outline
Concrete in embodiment three, and it is superior to embodiment two, the selfreparing recycled fine aggregate that volume volume is 15% has
Best selfreparing performance, average crack repair width total amount be respectively 1.43 times of volume volume 5%, 25%,
1.16 times, and the mechanical property of final measurement embodiment one and waterproof impervious characteristic result are also above embodiment two and embodiment
Three.It can be seen that the self-repair concrete in embodiment one can enhance cement base selfreparing efficiency by recycled fine aggregate, and by certainly
The higher mechanical property of body, reaches better repairing effect, has preferable practicability and economy.
Comparative example one:
In order to compare (the preparation and index parameter referenced patents number of expanded perlite: CN of expanded perlite carrier
109320144A) pass through under the influence of different time sections fracture reparation process, the same terms with recycled fine aggregate carrier
The acquisition observation of 150x crack observer takes the crack Dian Chu to repair width characterization repairing effect, mix ratio and preparation process and leaching
Stain mode is the same as example 1.
Crack repairing effect under 2 different time of table
As shown in table 2, wherein all there is different degrees of reparation phenomenon in 7 days two kinds of carriers, comparison discovery regenerates thin bone
Material carrier show the microorganism remediation time earlier, crack repair the higher feature of total amount, repairing effect was most at 28 days for test specimen
Obviously, there is the good behaviour that mark point almost heals.Although expanded perlite carrier also had certain repair to imitate at 7 days
Fruit, but crack repairing effect is unobvious, individual test specimens occurred repairing effect at 14 days and are better than recycled fine aggregate carrier phenomenon, and 28
It when crack repair and be greatly improved, but it is repaired total amount and is slightly below the reparation total amount of recycled fine aggregate carrier.Expanded pearlite
The reparation total amount of rock vehicle group 28d accounts for about 87% that recycled fine aggregate repairs total amount.
Comparative example two:
In order to more highlight the repairing effect of recycled fine aggregate carrier, under equal conditions and impregnation method, use is identical
Regeneration brick aggregate (regeneration brick aggregate processing method and index referenced patents number: CN102218435A) under particle size range is to carry
Body as a comparison, is probed into and repairs the influence size of process in different number of days fracture, is acquired and is observed by 150x crack observer
The crack Dian Chu is taken to repair width characterization repairing effect；
Crack repairing effect under 3 different time of table
As shown in table 3, compare regeneration brick aggregate group, using recycled fine aggregate carrier microorganisms firing time earlier, it is whole
Body repairing effect is significantly better than regeneration brick aggregate group.Wherein recycled fine aggregate vehicle group is substantially better than in the crack repairing effect of 7d
The repairing effect of regeneration brick aggregate carrier, regeneration brick aggregate vehicle group almost do not occur repairing effect in 7d, and with the time
Extension be always maintained at inefficient repairing effect.Two kinds of carriers of 14d repairing effect relatively, have compared with the crack 7d compared with overhaul
It is multiple；Regeneration brick aggregate is that carrier also occurs certain repairing effect in 28d, and whole repairing effect is slightly below expanded perlite load
Body group, the reparation total amount of regeneration brick aggregate vehicle group 28d account for about 63% that recycled fine aggregate repairs total amount.
In the present embodiment, above-listed embodiment, to the purpose of the present invention, technical solution and a little carried out further in detail
Describe in detail it is bright, it should be noted that, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all
Within the spirit and principles in the present invention, made any modifications, equivalent replacements, and improvements etc. should be included in guarantor of the invention
Protect model.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the disclosure to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments disclosed in this hair, if its without prejudice to
The thought of the disclosure equally should be considered as the content that the disclosure is invented.
Claims (10)
1. a kind of using recycled fine aggregate as the self-repair concrete of carrier, which is characterized in that the self-repair concrete includes
Concrete batching and selfreparing recycled fine aggregate, by volume percentage, selfreparing recycled fine aggregate accounts for self-repair concrete
5%~25%；
The selfreparing recycled fine aggregate is made of recycled fine aggregate dipping Bacillus pasteurii bacterium solution；
The OD value 1.2~1.8 of Bacillus pasteurii bacterium solution, using the cement in concrete as calculating benchmark, Bacillus pasteurii bacterium
The volume volume of liquid is 25%.
2. according to claim 1 using recycled fine aggregate as the self-repair concrete of carrier, which is characterized in that press volume hundred
Divide than meter, selfreparing recycled fine aggregate accounts for the 15% of self-repair concrete.
3. according to claim 1 or 2 using recycled fine aggregate as the self-repair concrete of carrier, which is characterized in that described
Recycled fine aggregate dipping Bacillus pasteurii bacterium solution process are as follows: under the conditions of negative pressure of vacuum 0.5Mpa dipping absorption 20min.
4. according to claim 1 or 2 using recycled fine aggregate as the self-repair concrete of carrier, which is characterized in that described
Recycled fine aggregate be metaling that concrete construction rubbish is formed after crushing；
The recycled fine aggregate is that partial size is 0~5mm, apparent density 2518kg/m3, bulk density 1255kg/m3, porosity
56%, crush index 14.5%, robustness 7.8%, moisture content 1.08%, 24 hours water absorption rates are 8.91%.
5. according to claim 1 or 2 using recycled fine aggregate as the self-repair concrete of carrier, which is characterized in that press matter
For amount than meter, the concrete batching is water: sand: stone: cement=0.3~0.6:3.10~3.5:1.60~2.00:1.00~
1.50。
6. according to claim 5 using recycled fine aggregate as the self-repair concrete of carrier, which is characterized in that the water
Mud is PO42.5 grades, density 3100kg/m3；The apparent density of the sand is 2724.8kg/m3, water absorption rate 1.02%, fineness
Modulus is 2.18；The apparent density of the natural rubble is 2801.8kg/m3, water absorption rate 0.47%, crush index 5.99.
7. a kind of using recycled fine aggregate as the preparation method of the self-repair concrete of carrier, which is characterized in that the selfreparing
Concrete includes concrete and selfreparing recycled fine aggregate, and by volume percentage, selfreparing recycled fine aggregate, which accounts for, reviews one's lessons by oneself compound
The 5%~25% of solidifying soil；The OD value 1.2~1.8 of Bacillus pasteurii bacterium solution, using the cement in concrete as calculating benchmark, bar
The volume volume of family name's bacillus bacterium solution is 25%；
The selfreparing recycled fine aggregate is made of recycled fine aggregate dipping Bacillus pasteurii bacterium solution, recycled fine aggregate dipping
The process of Bacillus pasteurii bacterium solution are as follows: dipping absorption 20min under the conditions of negative pressure of vacuum 0.5Mpa；
Concrete batching is mixed with selfreparing recycled fine aggregate and is mixed and stirred up to self-repair concrete.
8. according to claim 7 using recycled fine aggregate as the preparation method of the self-repair concrete of carrier, feature exists
In by volume percentage, selfreparing recycled fine aggregate accounts for the 15% of self-repair concrete.
9. according to claim 7 or 8 using recycled fine aggregate as the preparation method of the self-repair concrete of carrier, feature
It is, counts in mass ratio, the concrete batching is water: sand: stone: cement=0.3~0.6:3.10~3.5:1.60~
2.00:1.00~1.50；
The cement is PO42.5 grades, density 3100kg/m3；The apparent density of the sand is 2724.8kg/m3, water absorption rate
It is 1.02%, fineness modulus 2.18；The apparent density of the natural rubble is 2801.8kg/m3, water absorption rate 0.47%, pressure
Broken index is 5.99.
10. it is according to claim 7 or 8 using recycled fine aggregate as the preparation method of the self-repair concrete of carrier, it is special
Sign is that the recycled fine aggregate is the metaling that concrete construction rubbish is formed after crushing；
The partial size of the recycled fine aggregate is 0~5mm, apparent density 2518kg/m3, bulk density 1255kg/m3, porosity
56%, crush index 14.5%, robustness 7.8%, moisture content 1.08%, 24 hours water absorption rates are 8.91%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910693055.8A CN110482928B (en) | 2019-07-30 | 2019-07-30 | Self-repairing concrete with recycled fine aggregate as carrier and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910693055.8A CN110482928B (en) | 2019-07-30 | 2019-07-30 | Self-repairing concrete with recycled fine aggregate as carrier and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110482928A true CN110482928A (en) | 2019-11-22 |
| CN110482928B CN110482928B (en) | 2021-09-28 |
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| CN111559889A (en) * | 2020-03-25 | 2020-08-21 | 西安建筑科技大学 | Self-repairing concrete, prefabricated recycled aggregate concrete composite floor slab and preparation method |
| CN112374844A (en) * | 2020-10-27 | 2021-02-19 | 广州市净水有限公司 | Process for preparing biological bricks by recycling municipal domestic sludge incineration ash |
| CN112851170A (en) * | 2021-01-27 | 2021-05-28 | 西交利物浦大学 | Method for strengthening recycled aggregate concrete by utilizing microbial denitrification phenomenon and recycled aggregate concrete |
| CN114873958A (en) * | 2022-06-07 | 2022-08-09 | 太原理工大学 | Crack self-repairing concrete suitable for sewage treatment tank and preparation method thereof |
| CN115340313A (en) * | 2022-01-17 | 2022-11-15 | 浙江理工大学 | Method for strengthening recycled aggregate by physical compound microbial technology |
| WO2022253355A1 (en) * | 2022-01-20 | 2022-12-08 | 河南理工大学 | Strengthening method for recycled aggregate using biological deposition |
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| CN114873958A (en) * | 2022-06-07 | 2022-08-09 | 太原理工大学 | Crack self-repairing concrete suitable for sewage treatment tank and preparation method thereof |
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