CN105174852A - Recycled aggregate concrete and preparation method thereof - Google Patents
Recycled aggregate concrete and preparation method thereof Download PDFInfo
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- CN105174852A CN105174852A CN201510686280.0A CN201510686280A CN105174852A CN 105174852 A CN105174852 A CN 105174852A CN 201510686280 A CN201510686280 A CN 201510686280A CN 105174852 A CN105174852 A CN 105174852A
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses recycled aggregate concrete and a preparation method thereof. The recycled aggregate concrete comprises the following raw materials by weight percent: 15 to 20 percent of cement, 5 to 15 percent of water, 15 to 25 percent of third mixed additive, 38 to 63 percent of coarse aggregate, 0.3 to 1 percent of modified wood fiber-containing polyurethane modified epoxy resin flexibilizing emulsion, 0.1 to 0.5 percent of lauryl sodium sulfate, 0.1 to 0.5 percent of sodium gluconate, 0.1 to 0.5 percent of water glass, 0.5 to 1 percent of polyacrylate, and the sum of weight percent of the raw materials is 100 percent; and the coarse aggregate is the waste concrete renewable coarse aggregate or a mixture of waste concrete renewable coarse aggregate and natural coarse aggregate. The renewable aggregate concrete has good impact resistance, earthquake resistance and crack resistance, the pressure resisting strength of the recycled aggregate concrete in 28 days can reach 80 to 100 MPa, and the recycled aggregate concrete is applicable to a load-bearing structure.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of regenerated aggregate concrete and preparation method thereof.
Background technology
Both at home and abroad regeneration concrete quality and Original concrete and mortar performance, Original concrete deterioration extent, relation between breaking method and new compound composition are studied, think that content of mortar plays material impact to mensuration regeneration concrete performance in the original concrete sand-cement slurry agglutinate sticked on regeneration aggregate, the quality of mortar and interface region and original concrete.Recycled concrete strength characteristic is subject to as Matrix-concrete strength, the ratio of coarse-fine aggregate in original concrete, the impact of some key factors such as abrasion loss and water-absorbent of the when regeneration aggregate of maximum aggregate size and Aggregate of recycled concrete maximum particle diameter in original concrete, in addition, also there are certain influence effect water cement ratio, maximum aggregate size and dry mixing time to recycled concrete strength characteristic.
In actual applications, domestic situation also has a certain distance with external.Due to the data of domestic shortage original concrete, this makes the control of regeneration concrete quality have certain difficulty, thus in use, must test the performance of regeneration aggregate and regeneration concrete.Result of study shows simultaneously, if admixture such as energy admixture active superfine mineral powder and high efficiency water reducing agent etc., by certain technological approaches, modification is carried out to regeneration aggregate, can be made into that intensity is high, the High-performance green concrete of good endurance, thus be widely used in load larrying member, this will have more obvious social benefit, economic benefit and environmental benefit, but, at present to the antidetonation of regenerated aggregate concrete load larrying member and the experimental study of shock resistance aspect little, corresponding is with it that the Research on recycled aggregate concrete of applicable load larrying member is little.
Summary of the invention
The object of the present invention is to provide a kind of regenerated aggregate concrete and preparation method thereof, gained regenerated aggregate concrete has good shock resistance, antidetonation and resistance to cleavage, is applicable to the preparation of load larrying member, can make up the domestic deficiency studied in this respect at present.
For achieving the above object, the present invention adopts following technical scheme:
A kind of regenerated aggregate concrete, its raw material composition percentage is: cement 15-20%, water 5-15%, the 3rd mixed additive 15-25%, coarse aggregate 38%-63%, the toughness reinforcing emulsion 0.3-1% of polyurethane modified epoxy resin, sodium lauryl sulphate 0.1-0.5%, Sunmorl N 60S 0.1-0.5%, water glass 0.1-0.5%, polyacrylic ester 0.5-1% containing innovation wood fiber, and the weight percentage sum of above-mentioned each raw material is 100%;
Described coarse aggregate is the mixture of waste and old concrete regenerated coarse aggregate or waste and old concrete regenerated coarse aggregate and natural coarse aggregate;
Described waste and old concrete regeneration aggregate is obtained after broken, sorting, screening, cleaning, drying by waste and old concrete.
The preparation method of described 3rd mixed additive comprises the steps:
1) slag is obtained steel-making slag powder after fragmentation, screening, magnetic separation, selection by winnowing classification, then by steel-making slag powder, the plaster of Paris, sandstone with ball mill grinding to 400-480m
2/ kg, obtains the first mixture;
2) flyash, mortar plasticizing powder and breeze are worn into the powder that median size is 3.0-6 μm, obtain the second mixture;
3) the first mixture and the second mixture are mixed to get described 3rd mixed additive;
Its raw materials used percentage is: slag 12-18%, plaster of Paris 8-15%, sandstone 10-15%, and flyash 15-25%, mortar plasticizing powder 10-15%, surplus are breeze.
The preparation method of described innovation wood fiber comprises the following steps:
1) wood powder after the activated process of 200 weight part is joined in the aqueous solution containing 60-80 weight part coupling agent, stir 0.4h post-heating to 60-62 DEG C, filter after stirring 5-8h again, gained wood powder is placed in industrial centrifugal machine, takes out after the centrifugal 15min of 500r/min;
2) by the wood powder after process at 50-55 DEG C after vacuum-drying 24h, be cooled to 20-28 DEG C, then wood powder and 100-150 parts by weight maleic anhydride graft copolymer are loaded in high-speed mixer, 300r/min rotates mixing 1-2h post-heating to 80-100 DEG C, after mixing 10-15min again under 400-450r/min, be cooled to 45 DEG C, blowing, obtain just batch mixing;
3) first batch mixing is loaded in twin screw extruder, in 160-170 DEG C, extrude after mixing 0.5h under 50-60r/min;
4) gained mixing materials pulverized, obtaining granularity is 50-70 object innovation wood fiber;
Described activation treatment is added in high-speed mixer by the wood powder of drying, stirs at 80-90 DEG C, and add the aluminate coupling agent of wood powder weight 2% at twice, and twice joining day interval 3-4min, stirs 5-6min after adding again;
Described coupling agent is silane coupling agent.
The preparation method of the described toughness reinforcing emulsion of polyurethane modified epoxy resin containing innovation wood fiber comprises the following steps:
1) 100-120 weight of polyester polyvalent alcohol is heated to 90-110 DEG C in 30min;
2) after then polyester polyol being cooled to 45 DEG C, adding 20-25 weight part diphenylmethanediisocyanate, then be warmed up to 70 DEG C, after reaction 3h, be cooled to room temperature;
3) add 10-12 weight part TriMethylolPropane(TMP) and 10-12 weight part 2,3-butanediol again, vibration stirs, and then with 150-200 parts by weight epoxy resin, 10-15 weight part triphenylphosphine joins in 80-100 part by weight of n-butanol together;
4) while stirring, in 0.6h, be warming up to 75 DEG C, and be cooled to 25-30 DEG C continue to stir 1h at 75 DEG C after, regulate the pH value to 8 of emulsion with ammoniacal liquor;
5) part by weight modified for 30-50 xylon is joined in step 4) gained emulsion at 25-30 DEG C, and continue to stir 1h at 25 DEG C, obtain the described toughness reinforcing emulsion of polyurethane modified epoxy resin containing innovation wood fiber;
Described ammoniacal liquor be containing ammonia massfraction be the aqueous solution of 25-28%.
The preparation method of described regenerated aggregate concrete is: the toughness reinforcing emulsion of polyurethane modified epoxy resin and the 3rd mixed additive, sodium lauryl sulphate, Sunmorl N 60S, water glass, polyacrylic ester, cement, coarse aggregate, water that contain innovation wood fiber are mixed in proportion, stir to carry out after 20-30min vibrating, pour into a mould, normal curing, obtain described regenerated aggregate concrete.
China has a large amount of forest tree resources, compare with carbon fiber, steel fiber, glass fibre, good fortune tap fiber, steel wire/steel screen fabric, polyvinyl alcohol fiber, trevira, durafiber etc., xylon wide material sources, cost be lower, be easy to processing and environmental friendliness.As the xylon of one of natural macromolecular material, containing a large amount of hydroxyl reactive group in its molecular chain, there is very strong wetting ability, can with the hydrated product in concrete formation process, as formed hydrogen bond equimolecular intermolecular forces between calcium hydroxide, gel of calcium silicate, ettringite etc., this is conducive to the microstress strain property of Concrete Structure.The present invention adopts a kind of innovation wood fiber to carry out toughness reinforcing to concrete first, this xylon first after through silane coupling agent and maleic anhydride graft terpolymer modified, its mechanical property is more excellent, and ageing-resistant and anti-hydrolytic performance significantly improves, it is a kind of desirable concrete toughened fiber material.
Epoxy resin has many advantages, as low in the chemical stability of excellence, erosion resistance, electrical apparatus insulation and shrinking percentage etc.But cross-linking density is high after single epoxy resin cure, in tridimensional network, there is the shortcomings such as internal stress is large, matter is crisp, poor impact resistance, easily cracking, be difficult to meet the toughness reinforcing engineering requirement of concrete, make it apply and be subject to certain restrictions.For a long time, carry out toughening modifying to epoxy resin is an important research contents always.Urethane is the polymer of a class excellent property, has high impact strength and excellent resistance to low temperature, both can be made to have complementary advantages with polyurethane modified epoxy resin.Epoxy resin latex is through polyurethane-modified, the structure of microcosmic interpenetrating(polymer)networks can be formed, thus make concrete material show good toughness, intensity, fatigue resistance and isotropy, add innovation wood processbearing astrocyte composite toughening material again, the effect of bi-material coordination plasticizing can be played better, bring great improvement to concrete performance.
Regenerated coarse aggregate has the shortcomings such as voidage is high, water-intake rate is high, crush index is low compared with natural coarse aggregate.Therefore, when regenerated coarse aggregate being used for manufacture concrete, concrete slump can be brought to be difficult to control, low, the Young's modulus of intensity declines, contract with dry rate and creep is high and degradation weakness under weather resistance, thus cause the application of regenerated coarse aggregate in structural concrete very limited.The present invention uses waste and old concrete regenerated coarse aggregate to substitute 20%-100% natural coarse aggregate, effectively can reduce the consumption of sand and stone resources, the solidification of epoxy resin and superfine mineral powder well can fill the hole of regenerated aggregate concrete, and add the density that polyacrylic ester can increase regenerated aggregate concrete, resistance to cleavage, shock resistance and anti-permeability performance, the use of composite toughening material also add the toughness of regenerated aggregate concrete, the regenerated aggregate concrete that the present invention is obtained has good shock resistance, antidetonation and resistance to cleavage, its 28 days ultimate compression strength can reach 80-100MPa, for high-strength and high-ductility regenerated aggregate concrete, be suitable for building bearing structure.
Embodiment
More being convenient to make content of the present invention understand, below in conjunction with embodiment, technical solutions according to the invention are described further, but the present invention being not limited only to this.
Coupling agent used is U.S.'s union carbide corporation's trade mark is the silane coupling agent of A-151 or A-171.
Waste and old concrete regeneration aggregate is by waste and old concrete crusher in crushing, sorts out the foreign material outside concrete, is then sieved out the regenerated coarse aggregate of 5mm by mesh screen, obtains with naturally to dry after clean water.
embodiment 1:
1. the preparation of innovation wood fiber:
1) add in high-speed mixer by the wood powder of drying, stir at 80 DEG C, and add the aluminate coupling agent of wood powder weight 2% at twice, twice joining day interval 3min, stirs 5min again after adding, obtains the wood powder after activation treatment;
2) wood powder after the activated process of 200 weight part is joined in the aqueous solution containing 60 weight part A-151 silane coupling agents, stir 0.4h post-heating to 60 DEG C, filter after stirring 8h again, gained wood powder is placed in industrial centrifugal machine, takes out after the centrifugal 15min of 500r/min;
3) by the wood powder after process at 50 DEG C after vacuum-drying 24h, be cooled to 20 DEG C, then wood powder and 100 parts by weight maleic anhydride graft copolymers are loaded in high-speed mixer, 300r/min rotates mixing 2h post-heating to 100 DEG C, after mixing 15min again under 400r/min, be cooled to 45 DEG C, blowing, obtain just batch mixing;
4) first batch mixing is loaded in twin screw extruder, in 160 DEG C, extrude after mixing 0.5h under 60r/min;
5) gained mixing materials pulverized, obtaining granularity is 50 object innovation wood fibers.
2. containing the preparation of the toughness reinforcing emulsion of polyurethane modified epoxy resin of innovation wood fiber:
1) 100 weight of polyester polyvalent alcohols are heated to 110 DEG C in 30min;
2) after then polyester polyol being cooled to 45 DEG C, adding 20 weight part diphenylmethanediisocyanates, then be warmed up to 70 DEG C, after reaction 3h, be cooled to room temperature;
3) add 10 weight part TriMethylolPropane(TMP)s and 10 weight part 2,3-butanediols again, vibration stirs, and then with 150 parts by weight epoxy resin, 10 weight part triphenylphosphines join in 80 part by weight of n-butanol together;
4) while stirring, in 0.6h, be warming up to 75 DEG C, and be cooled to 25 DEG C continue to stir 1h at 75 DEG C after, regulate the pH value to 8 of emulsion with the ammonia soln containing ammonia massfraction being 25%;
5) 30 part by weight modified xylons are joined in step 4) gained emulsion at 25 DEG C, and continue to stir 1h at 25 DEG C, obtain the described toughness reinforcing emulsion of polyurethane modified epoxy resin containing innovation wood fiber.
3. the preparation of the 3rd mixed additive
1) slag is obtained steel-making slag powder after fragmentation, screening, magnetic separation, selection by winnowing classification, then by steel-making slag powder, the plaster of Paris, sandstone with ball mill grinding to 400m
2/ kg, obtains the first mixture;
2) flyash, mortar plasticizing powder and breeze are worn into the powder that median size is 4.0 μm, obtain the second mixture;
3) the first mixture and the second mixture are mixed to get described 3rd mixed additive;
Its raw materials used percentage is: slag 12%, the plaster of Paris 8%, sandstone 10%, and flyash 15%, mortar plasticizing powder 10%, surplus are breeze.
4. the preparation of regenerated aggregate concrete
The toughness reinforcing emulsion of polyurethane modified epoxy resin and the 3rd mixed additive, sodium lauryl sulphate, Sunmorl N 60S, water glass, polyacrylic ester, cement, waste and old concrete regeneration aggregate, natural coarse aggregate, water that contain innovation wood fiber are mixed in proportion, stir to carry out after 20min vibrating, pour into a mould, normal curing, obtain described regenerated aggregate concrete.
Its raw material composition percentage is: cement 15%, water 5%, the 3rd mixed additive 15%, natural coarse aggregate 20%, waste and old concrete regenerated coarse aggregate 43%, the toughness reinforcing emulsion 0.3% of polyurethane modified epoxy resin, sodium lauryl sulphate 0.1%, Sunmorl N 60S 0.5%, water glass 0.1%, polyacrylic ester 1% containing innovation wood fiber.
After testing, the present embodiment gained regenerated aggregate concrete 28 days ultimate compression strength is 86.7MPa, and 28 days cleavage strengths are 5.75MPa, and 28 days Young's modulus are 33.8GPa, show that regenerated aggregate concrete has good strength and toughness, be well positioned to meet the demand of building bearing structure.
embodiment 2:
1. the preparation of innovation wood fiber:
1) add in high-speed mixer by the wood powder of drying, stir at 85 DEG C, and add the aluminate coupling agent of wood powder weight 2% at twice, twice joining day interval 3min, stirs 6min again after adding, obtains the wood powder after activation treatment;
2) wood powder after the activated process of 200 weight part is joined in the aqueous solution containing 70 weight part A-171 silane coupling agents, stir 0.4h post-heating to 61 DEG C, filter after stirring 6h again, gained wood powder is placed in industrial centrifugal machine, takes out after the centrifugal 15min of 500r/min;
3) by the wood powder after process at 52 DEG C after vacuum-drying 24h, be cooled to 26 DEG C, then wood powder and 120 parts by weight maleic anhydride graft copolymers are loaded in high-speed mixer, 300r/min rotates mixing 1.5h post-heating to 90 DEG C, after mixing 13min again under 420r/min, be cooled to 45 DEG C, blowing, obtain just batch mixing;
4) first batch mixing is loaded in twin screw extruder, in 165 DEG C, extrude after mixing 0.5h under 55r/min;
5) gained mixing materials pulverized, obtaining granularity is 60 object innovation wood fibers.
2. containing the preparation of the toughness reinforcing emulsion of polyurethane modified epoxy resin of innovation wood fiber:
1) 110 weight of polyester polyvalent alcohols are heated to 95 DEG C in 30min;
2) after then polyester polyol being cooled to 45 DEG C, adding 23 weight part diphenylmethanediisocyanates, then be warmed up to 70 DEG C, after reaction 3h, be cooled to room temperature;
3) add 11 weight part TriMethylolPropane(TMP)s and 11 weight part 2,3-butanediols again, vibration stirs, and then with 180 parts by weight epoxy resin, 12 weight part triphenylphosphines join in 90 part by weight of n-butanol together;
4) while stirring, in 0.6h, be warming up to 75 DEG C, and be cooled to 28 DEG C continue to stir 1h at 75 DEG C after, regulate the pH value to 8 of emulsion with the ammonia soln containing ammonia massfraction being 26%;
5) 40 part by weight modified xylons are joined in step 4) gained emulsion at 28 DEG C, and continue to stir 1h at 25 DEG C, obtain the described toughness reinforcing emulsion of polyurethane modified epoxy resin containing innovation wood fiber.
3. the preparation of the 3rd mixed additive
1) slag is obtained steel-making slag powder after fragmentation, screening, magnetic separation, selection by winnowing classification, then by steel-making slag powder, the plaster of Paris, sandstone with ball mill grinding to 420m
2/ kg, obtains the first mixture;
2) flyash, mortar plasticizing powder and breeze are worn into the powder that median size is 5.6 μm, obtain the second mixture;
3) the first mixture and the second mixture are mixed to get described 3rd mixed additive;
Its raw materials used percentage is: slag 16%, the plaster of Paris 10%, sandstone 12%, and flyash 20%, mortar plasticizing powder 12%, surplus are breeze.
4. the preparation of regenerated aggregate concrete
The toughness reinforcing emulsion of polyurethane modified epoxy resin and the 3rd mixed additive, sodium lauryl sulphate, Sunmorl N 60S, water glass, polyacrylic ester, cement, waste and old concrete regeneration aggregate, natural coarse aggregate, water that contain innovation wood fiber are mixed in proportion, stir to carry out after 25min vibrating, pour into a mould, normal curing, obtain described regenerated aggregate concrete.
Its raw material composition percentage is: cement 18%, water 10%, the 3rd mixed additive 16%, natural coarse aggregate 25%, waste and old concrete regenerated coarse aggregate 28.6%, the toughness reinforcing emulsion 1% of polyurethane modified epoxy resin, sodium lauryl sulphate 0.5%, Sunmorl N 60S 0.1%, water glass 0.2%, polyacrylic ester 0.6% containing innovation wood fiber.
After testing, the present embodiment gained regenerated aggregate concrete 28 days ultimate compression strength is 84.7MPa, and 28 days cleavage strengths are 4.65MPa, and 28 days Young's modulus are 32.5GPa, show that regenerated aggregate concrete has good strength and toughness, be well positioned to meet the demand of building bearing structure.
embodiment 3:
1. the preparation of innovation wood fiber:
1) add in high-speed mixer by the wood powder of drying, stir at 90 DEG C, and add the aluminate coupling agent of wood powder weight 2% at twice, twice joining day interval 4min, stirs 6min again after adding, obtains the wood powder after activation treatment;
2) wood powder after the activated process of 200 weight part is joined in the aqueous solution containing 80 weight part A-151 silane coupling agents, stir 0.4h post-heating to 62 DEG C, filter after stirring 5h again, gained wood powder is placed in industrial centrifugal machine, takes out after the centrifugal 15min of 500r/min;
3) by the wood powder after process at 55 DEG C after vacuum-drying 24h, be cooled to 28 DEG C, then wood powder and 150 parts by weight maleic anhydride graft copolymers are loaded in high-speed mixer, 300r/min rotates mixing 1h post-heating to 80 DEG C, after mixing 10min again under 450r/min, be cooled to 45 DEG C, blowing, obtain just batch mixing;
4) first batch mixing is loaded in twin screw extruder, in 170 DEG C, extrude after mixing 0.5h under 50r/min;
5) gained mixing materials pulverized, obtaining granularity is 70 object innovation wood fibers.
2. containing the preparation of the toughness reinforcing emulsion of polyurethane modified epoxy resin of innovation wood fiber:
1) 120 weight of polyester polyvalent alcohols are heated to 90 DEG C in 30min;
2) after then polyester polyol being cooled to 45 DEG C, adding 25 weight part diphenylmethanediisocyanates, then be warmed up to 70 DEG C, after reaction 3h, be cooled to room temperature;
3) add 12 weight part TriMethylolPropane(TMP)s and 12 weight part 2,3-butanediols again, vibration stirs, and then with 200 parts by weight epoxy resin, 15 weight part triphenylphosphines join in 100 part by weight of n-butanol together;
4) while stirring, in 0.6h, be warming up to 75 DEG C, and be cooled to 30 DEG C continue to stir 1h at 75 DEG C after, regulate the pH value to 8 of emulsion with the ammonia soln containing ammonia massfraction being 28%;
5) 50 part by weight modified xylons are joined in step 4) gained emulsion at 30 DEG C, and continue to stir 1h at 25 DEG C, obtain the described toughness reinforcing emulsion of polyurethane modified epoxy resin containing innovation wood fiber.
3. the preparation of the 3rd mixed additive
1) slag is obtained steel-making slag powder after fragmentation, screening, magnetic separation, selection by winnowing classification, then by steel-making slag powder, the plaster of Paris, sandstone with ball mill grinding to 480m
2/ kg, obtains the first mixture;
2) flyash, mortar plasticizing powder and breeze are worn into the powder that median size is 6 μm, obtain the second mixture;
3) the first mixture and the second mixture are mixed to get described 3rd mixed additive;
Its raw materials used percentage is: slag 18%, the plaster of Paris 15%, sandstone 15%, and flyash 25%, mortar plasticizing powder 15%, surplus are breeze.
4. the preparation of regenerated aggregate concrete
The toughness reinforcing emulsion of polyurethane modified epoxy resin and the 3rd mixed additive, sodium lauryl sulphate, Sunmorl N 60S, water glass, polyacrylic ester, cement, waste and old concrete regeneration aggregate, water that contain innovation wood fiber are mixed in proportion, stir to carry out after 30min vibrating, pour into a mould, normal curing, obtain described regenerated aggregate concrete.
Its raw material composition percentage is: cement 20, water 15%, the 3rd mixed additive 25%, waste and old concrete regenerated coarse aggregate 38%, the toughness reinforcing emulsion 0.5% of polyurethane modified epoxy resin, sodium lauryl sulphate 0.3%, Sunmorl N 60S 0.2%, water glass 0.5%, polyacrylic ester 0.5% containing innovation wood fiber.
After testing, the present embodiment gained regenerated aggregate concrete 28 days ultimate compression strength is 92.7MPa, and 28 days cleavage strengths are 5.95MPa, and 28 days Young's modulus are 34.5GPa, show that regenerated aggregate concrete has good strength and toughness, be well positioned to meet the demand of building bearing structure.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. a regenerated aggregate concrete, it is characterized in that: its raw material composition percentage is: cement 15-20%, water 5-15%, the 3rd mixed additive 15-25%, coarse aggregate 38%-63%, the toughness reinforcing emulsion 0.3-1% of polyurethane modified epoxy resin, sodium lauryl sulphate 0.1-0.5%, Sunmorl N 60S 0.1-0.5%, water glass 0.1-0.5%, polyacrylic ester 0.5-1% containing innovation wood fiber, and the weight percentage sum of above-mentioned each raw material is 100%;
Described coarse aggregate is the mixture of waste and old concrete regenerated coarse aggregate or waste and old concrete regenerated coarse aggregate and natural coarse aggregate.
2. regenerated aggregate concrete according to claim 1, is characterized in that: the preparation method of described 3rd mixed additive comprises the steps:
1) slag is obtained steel-making slag powder after fragmentation, screening, magnetic separation, selection by winnowing classification, then by steel-making slag powder, the plaster of Paris, sandstone with ball mill grinding to 400-480m
2/ kg, obtains the first mixture;
2) flyash, mortar plasticizing powder and breeze are worn into the powder that median size is 4.0-6.6 μm, obtain the second mixture;
3) the first mixture and the second mixture are mixed to get described 3rd mixed additive;
Its raw materials used percentage is: slag 12-18%, plaster of Paris 8-15%, sandstone 10-15%, and flyash 15-25%, mortar plasticizing powder 10-15%, surplus are breeze.
3. regenerated aggregate concrete according to claim 1, is characterized in that: the preparation method of described innovation wood fiber comprises the following steps:
1) join in the aqueous solution containing coupling agent by the wood powder after activated process, stir 0.4h post-heating to 60-62 DEG C, then filter after stirring 5-8h, gained wood powder is placed in industrial centrifugal machine, takes out after the centrifugal 15min of 500r/min;
2) by the wood powder after process at 50-55 DEG C after vacuum-drying 24h, be cooled to 20-28 DEG C, then wood powder and maleic anhydride graft copolymer are loaded in high-speed mixer, 300r/min rotates mixing 1-2h post-heating to 80-100 DEG C, after mixing 10-15min again under 400-450r/min, be cooled to 45 DEG C, blowing, obtain just batch mixing;
3) first batch mixing is loaded in twin screw extruder, in 160-170 DEG C, extrude after mixing 0.5h under 50-60r/min;
4) gained mixing materials pulverized, obtaining granularity is 50-70 object innovation wood fiber;
Described activation treatment is added in high-speed mixer by the wood powder of drying, stirs at 80-90 DEG C, and add the aluminate coupling agent of wood powder weight 2% at twice, and twice joining day interval 3-4min, stirs 5-6min after adding again;
Described coupling agent is silane coupling agent.
4. regenerated aggregate concrete according to claim 1, is characterized in that: the preparation method of the described toughness reinforcing emulsion of polyurethane modified epoxy resin containing innovation wood fiber comprises the following steps:
1) polyester polyol is heated to 90-110 DEG C in 30min;
2) after then polyester polyol being cooled to 45 DEG C, add diphenylmethanediisocyanate, then be warmed up to 70 DEG C, after reaction 3h, be cooled to room temperature;
3) add TriMethylolPropane(TMP) and 2,3-butanediol again, vibration stirs, and then joins in propyl carbinol together with epoxy resin, triphenylphosphine;
4) while stirring, in 0.6h, be warming up to 75 DEG C, and be cooled to 25-30 DEG C continue to stir 1h at 75 DEG C after, regulate the pH value to 8 of emulsion with ammoniacal liquor;
5) innovation wood fiber is joined in step 4) gained emulsion at 25-30 DEG C, and continue to stir 1h at 25 DEG C, obtain the described toughness reinforcing emulsion of polyurethane modified epoxy resin containing innovation wood fiber;
Described ammoniacal liquor be containing ammonia massfraction be the aqueous solution of 25-28%.
5. regenerated aggregate concrete according to claim 1, it is characterized in that: its preparation method is: the toughness reinforcing emulsion of polyurethane modified epoxy resin and the 3rd mixed additive, sodium lauryl sulphate, Sunmorl N 60S, water glass, polyacrylic ester, cement, coarse aggregate, water that contain innovation wood fiber are mixed in proportion, stir to carry out after 20-30min vibrating, pour into a mould, normal curing, obtain described regenerated aggregate concrete.
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| CN106316262A (en) * | 2016-08-23 | 2017-01-11 | 廊坊荣盛混凝土有限公司 | Process for preparing concrete with recycled coarse aggregates prepared by waste concrete |
| CN106380130A (en) * | 2016-08-26 | 2017-02-08 | 北海金匠水泥制品有限责任公司 | Cement brick containing building waste residue |
| CN106904996A (en) * | 2017-03-13 | 2017-06-30 | 阜阳市金木工艺品有限公司 | Enhanced low-absorption cement sill fibrous foam composite of a kind of granular polystyrene and preparation method thereof |
| WO2017132730A1 (en) * | 2016-02-02 | 2017-08-10 | Cycrete Pty. Ltd. | An apparatus, composition and method for recycling a material |
| CN107555896A (en) * | 2017-08-21 | 2018-01-09 | 暨南大学 | It is a kind of to excite slag and the standby admixture of coal ash for manufacturing and the high-strength concrete prepared using admixture with waterglass |
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| CN110563429A (en) * | 2019-09-20 | 2019-12-13 | 成都志达商品混凝土厂 | high-strength pervious concrete |
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| CN112876153A (en) * | 2021-04-21 | 2021-06-01 | 西安天盛混凝土有限公司 | Recycled concrete and preparation method thereof |
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| US10722902B2 (en) | 2016-02-02 | 2020-07-28 | Cycrete Pty, Ltd. | Apparatus, composition and method for recycling a material |
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| CN108191281A (en) * | 2017-12-29 | 2018-06-22 | 石家庄铁道大学 | A kind of regenerated aggregate concrete interfacial transition zone intensifying method |
| CN108191281B (en) * | 2017-12-29 | 2020-12-25 | 石家庄铁道大学 | Recycled aggregate concrete interface transition zone strengthening method |
| CN110272234A (en) * | 2018-03-13 | 2019-09-24 | 金玟九 | Utilize the polymer concrete of construction waste, the manufacturing method of the polymer concrete of industry waste material and utilization above method manufacture |
| CN108911618A (en) * | 2018-08-01 | 2018-11-30 | 合肥尚涵装饰工程有限公司 | A kind of preparation method of the hollow partition board of excellent in mechanical performance |
| CN109608152A (en) * | 2019-01-29 | 2019-04-12 | 杭州申华混凝土有限公司 | A kind of green strong concrete and its preparation process |
| CN110105014B (en) * | 2019-05-08 | 2021-08-06 | 温州市三箭混凝土有限公司 | High-performance concrete and preparation method thereof |
| CN110105014A (en) * | 2019-05-08 | 2019-08-09 | 温州市三箭混凝土有限公司 | A kind of high performance concrete and preparation method thereof |
| CN110357538A (en) * | 2019-08-01 | 2019-10-22 | 西安新意达建筑制品有限公司 | A kind of regeneration self-compacting concrete and preparation method thereof |
| CN110357538B (en) * | 2019-08-01 | 2021-09-24 | 西安新意达建筑制品有限公司 | Regenerated self-compacting concrete and preparation method thereof |
| CN110563429A (en) * | 2019-09-20 | 2019-12-13 | 成都志达商品混凝土厂 | high-strength pervious concrete |
| CN110563429B (en) * | 2019-09-20 | 2021-06-11 | 成都志达商品混凝土厂 | High-strength pervious concrete |
| CN111892359A (en) * | 2020-08-19 | 2020-11-06 | 彭材大 | Environment-friendly green concrete and preparation method thereof |
| CN112876153A (en) * | 2021-04-21 | 2021-06-01 | 西安天盛混凝土有限公司 | Recycled concrete and preparation method thereof |
| CN113998961A (en) * | 2021-12-13 | 2022-02-01 | 中国建筑西南设计研究院有限公司 | Anti-freezing concrete using solid anti-freezing agent and preparation method thereof |
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