CN103936368B - C40 level simple grain level regeneration self-compacting concrete and preparation method thereof - Google Patents
C40 level simple grain level regeneration self-compacting concrete and preparation method thereof Download PDFInfo
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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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Abstract
The invention discloses a kind of C40 level simple grain level regeneration self-compacting concrete, the raw material components that it is characterized in that described self-compacting concrete is cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and additive, and the water-cement ratio of self-compacting concrete is 0.32; Wherein mark calculating raw material components is by weight: cement 1 parts by weight; Regenerated coarse aggregate 0.63～1.38 parts by weight; Natural coarse aggregate 0.61～1.48 parts by weight; Fine aggregate 1.71 parts by weight; Water 0.40 parts by weight; Additional water 0.03～0.07 parts by weight; Flyash 0.25 parts by weight; Additive 0.007～0.010 parts by weight. The mobility of this regeneration self-compacting concrete, fillibility, education resistance, through time loss and intensity all meet related request. When constructability, reduce concrete production cost. Meanwhile, can also solve the problem of building waste processing, alleviate the pressure of resource exhaustion, environmental protection, preparation method is simple, is applicable to suitability for industrialized production.
Description
Technical field
The invention belongs to building material technical field, be specifically related to be a kind of adopt in building demolition thing, contain broken on a small quantityThe discarded concrete of brick replaces the side of part natural coarse aggregate preparation regeneration self-compacting concrete as simple grain level regenerated coarse aggregateMethod.
Background technology
Self-compacting concrete (SelfCompactingConcrete or Self-ConsolidatingConcrete letterClaim SCC) refer under self gravitation effect, can flow, closely knit, even if there is also filling template completely of fine and close reinforcing bar, togetherTime obtain fine homogenieity, and do not need the concrete of extraneous vibration. Preparation self-compacting concrete is generally by additive, glueThe selection of knot material and coarse-fine aggregate and collocation and meticulous mix-design, by concrete yield stress be reduced to be enough to byThe shear stress producing because of deadweight overcomes, and concrete flowability is increased, and has again enough plastic viscosities simultaneously, makes aggregate suspendIn cement mortar, there is not segregation and bleeding problem, can freely trickle and abundant filling template in space, form closely knit and equalEven jelling structure.
Remove and the shortening in building service life itself has caused a large amount of building waste concretes. And at present about againThe research of growing concrete mainly concentrates on and utilizes discarded concrete to be processed into regeneration aggregate to prepare normal concrete. Self-compaction coagulationSoil is a kind of high performance concrete, there is very high mobility and in casting process, do not emanate, bleeding not, can be without shakingSmash and be full of masterplate and parcel reinforcing bar concrete. What existing regeneration aggregate was prepared self-compacting concrete employing is all to connectThe regeneration aggregate of continuous grating, the regeneration aggregate production process of continuous grading is loaded down with trivial details. The present invention therefore.
Summary of the invention
The object of the invention is to provide a kind of C40 level simple grain level regeneration self-compacting concrete, solved in prior art fromAir-free concrete needs the regeneration aggregate of continuous grading to produce, and operation is numerous and diverse, and the cost of material needing is asked compared with high-technologyTopic.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
A kind of C40 level simple grain level regeneration self-compacting concrete, is characterized in that the raw material components of described self-compacting concreteFor cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and additive, and self-compacting concreteWater-cement ratio is 0.32; Wherein mark calculating raw material components is by weight:
Cement 1 parts by weight;
Regenerated coarse aggregate 0.63～1.38 parts by weight;
Natural coarse aggregate 0.61～1.48 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.03～0.07 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.007～0.010 parts by weight.
In preferred technical scheme: described self-compacting concrete by weight mark calculating raw material components is:
Cement 1 parts by weight;
Regenerated coarse aggregate 0.63～1.02 parts by weight;
Natural coarse aggregate 1.02～1.48 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.03～0.07 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.007～0.010 parts by weight.
In preferred technical scheme: described self-compacting concrete by weight mark calculating raw material components is:
Cement 1 parts by weight;
Regenerated coarse aggregate 1.02～1.38 parts by weight;
Natural coarse aggregate 0.61～1.02 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.03～0.07 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.007～0.010 parts by weight.
In preferred technical scheme: described self-compacting concrete by weight mark calculating raw material components is:
Cement 1 parts by weight;
Regenerated coarse aggregate 0.63 parts by weight;
Natural coarse aggregate 1.48 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.03 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.010 parts by weight.
In preferred technical scheme: described self-compacting concrete by weight mark calculating raw material components is:
Cement 1 parts by weight;
Regenerated coarse aggregate 1.02 parts by weight;
Natural coarse aggregate 1.02 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.05 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.008 parts by weight.
In preferred technical scheme: described self-compacting concrete by weight mark calculating raw material components is:
Cement 1 parts by weight;
Regenerated coarse aggregate 1.38 parts by weight;
Natural coarse aggregate 0.61 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.07 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.007 parts by weight.
In preferred technical scheme: described regenerated coarse aggregate be by by the discarded concrete in building waste through sorting,Fragmentation and screening, remove and be less than 9.50mm and be greater than after the particle of 20mm, is processed into aggregate size scope 10～20mm'sParticle diameter section is regenerated coarse aggregate.
In preferred technical scheme: described natural coarse aggregate adopts the rubble of 5～20mm continuous size fraction, and apparent density is2.75g/cm3, bulk density is 1.35g/cm3, water absorption rate is 0.45%.
In preferred technical scheme: the apparent density of described regenerated coarse aggregate is controlled at 2.35g/cm3, bulk density controlAt 1.23g/cm3, water absorption rate is controlled at 4.76%.
In preferred technical scheme: described fine aggregate is medium sand; Described cement is PO42.5 Portland cement; InstituteStating flyash is I level flyash.
Another object of the present invention is to provide a kind of preparation side of described C40 level simple grain level regeneration self-compacting concreteMethod, is characterized in that said method comprising the steps of:
(1) preparation of regenerated coarse aggregate: the discarded concrete in building waste, through sorting, broken and screening, is removed littleIn 9.50mm and being greater than after the particle of 20mm, be processed into regenerated coarse aggregate with aggregate size in 10～20mm particle diameter section;
(2) take cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and outer by match ratioAdd agent, feed intake and then start and stir according to the order of regenerated coarse aggregate, natural coarse aggregate, fine aggregate, cement, flyash and additiveMix machine, dry mixing 1～2min;
(3) add load weighted water and additional water, continue to stir 1～2min and obtain described C40 level simple grain level againBe conigenous air-free concrete.
Term explanation
Cement in technical solution of the present invention, includes but not limited to portland cement or other blended cements etc. Its mesosilicic acidSalt cement, includes but not limited to low-heat portland cement, Portland cement, early strength silicate cement, super early strength silicateCement, moderate-heat portland cement, sulfate resisting Portland cement etc. In addition, blended cement, include but not limited to blast-furance cement,Silica cement, pulverized fuel ash cement etc. As cement, portland cement is preferred, wherein, and Portland cement, middle hot siliconAcid salt cement or low-heat portland cement are preferred. The label of cement is the index of cement " intensity ". The intensity of cement is tableShow the size that unit are is stressed, after referring to that cement adds water and mixes and stirs, solid degree after condensing, hardening (intensity of cement withThe ratios that add water in temperature, humidity and cement when mineralogical composition, the grain fineness of composition cement, sclerosis etc. are because haveClose). It is 42.5 Portland cement that PO42.5 Portland cement is strength grade.
As for concrete aggregate, can list coarse aggregate and fine aggregate. Here in self-compacting concrete, add,As coarse aggregate and the fine aggregate of aggregate. As coarse aggregate, can list river gravel, sea gravel, mountain gravel, rubble, slag brokenStone etc., as fine aggregate, can list river sand, extra large sand, mountain sand etc. In addition, coarse aggregate and fine aggregate can be according to common pointsClass (screening etc.) is distinguished.
In addition,, in this concrete, consider every 1m from the viewpoint that obtains sufficient intensity3This concrete is preferably 700～1000kg, more preferably 800～900kg, in addition, the every 1m of the content of coarse aggregate3Concrete is preferably 800～1100kg, more excellentElect 850～950kg as. This concrete for example can obtain in the following way: add cement additive, flyash to waterIn mud, form cement composition, then water and aggregate are added in this cement composition and mixed, obtain thus. But, byIn concrete of the present invention as long as contain above-mentioned cement additive in its composition, therefore, can be time prepared by concreteAdd. Described fine aggregate is medium sand, and described additive is polycarboxylate water-reducer, and described cement is PO42.5 normal silicate waterMud, described flyash is I level flyash.
In addition, in concrete, further contain concrete admixture. Concrete admixture is in ready-mixed concrete processMix, account for cement quality below 5%, can significantly improve concrete performance. As preferably, concrete admixture is water reducer.As water reducer, can apply ad lib the works such as water reducer, AE water reducer, high-performance water reducing agent, high performance AF dehumidifying agentFor the known material of water reducer using in concrete. The water reducer of polybasic carboxylic acid system is preferred. Water reducer is in cement groupContent in compound is preferably 0.8～3.0 quality %. In addition, water reducer can not contain as cement additive, but in systemWhen standby concrete, add.
High-performance water reducing agent, includes but not limited to naphthalene series high-efficiency water-reducing agent, high-efficiency water-reducing agent of poly-carboxylic acid and aliphatic high-efficiencyWater reducer. Wherein naphthalene series high-efficiency water-reducing agent is naphthalenesulfonate formaldehyde condensation compound. Aliphatic high-efficiency water reducing agent is that acetone sulfonation is syntheticThe burnt aldehyde of carbonyl. Polycarboxylate water-reducer (PolycarboxylateSuperplasticizer) is a kind of high-performance water reducing agent,Be a kind of cement dispersants during cement concrete uses, chemically can be divided into two classes, taking main chain as methacrylic acid, side chainFor hydroxy-acid group and MPEG (Methoxypolyethyleneglycol), polyester-type structure. Another is for main chain is for gathering thirdOlefin(e) acid, side chain is Vinylalcoholpolyethyleneglycol, polyether-type structure.
Aggregate plays the granular loose material of skeleton or filling effect in concrete. Aggregate is as the master in concreteWant raw material, in building, play skeleton and supporting role. The aggregate that particle diameter is greater than 4.75mm is called coarse aggregate, is commonly called as stone. ConventionalHave two kinds, rubble and a cobble. Rubble is that natural rock or rock are made through Mechanical Crushing, screening, and particle diameter is greater than 4.75mm'sRock particles. Cobble is by weathering, potamic transport and sorting, accumulation form, particle diameter is greater than 4.75mm rock particles.2.4 times of persons of average grain diameter that the length of cobble and gravel particle is greater than the affiliated corresponding grade of this particle are elongated piece; Thickness is littleIt is sheet-like particle (average grain diameter refers to the mean value of this grade superior and inferior limit of particle size) in 0.4 times of person of average grain diameter. Cobble for building,Rubble should meet the technical requirement of standard GB/T/T14685-2001 " cobble for building, rubble ". Below particle diameter 4.75mmAggregate is called fine aggregate, is commonly called as sand. Sand is divided into natural sand, artificial sand two classes by product source. Natural sand is to be removed by weathering, currentFortune and sorting, accumulation form, particle diameter is less than the rock particles of 4.75mm, but does not comprise the particle of soft rock, decayed rock. My godSo sand comprises river sand, lake sand, mountain sand and desalted sea sand. Artificial sand is the Machine-made Sand through processing except soil, the general designation of mixed sand.
Natural coarse aggregate of the present invention is general conventional coarse aggregate; And regenerated coarse aggregate is by giving up in building wasteAbandon concrete through sorting, broken and screening, remove and be less than 9.50mm and be greater than after the particle of 20mm, the aggregate size of being processed intoScope is in the particle diameter section of 10～20mm.
Flyash, is to receive and catch the thin ash getting off in the flue gas from coal combustion, and flyash is the main of coal-burning power plant's dischargeSolid waste. Flyash can be used as concrete admixture.
The present invention adopts simple grain level regeneration aggregate to prepare high performance flowing concrete not only to have simplified manufacturing procedure, andReduce cost. Current little about adopting simple grain level regeneration aggregate to prepare the research of high performance flowing concrete. Therefore, joinSelf-compaction regenerated aggregate concrete processed not only can effectively solve environment and the social concern that building waste causes, and also has certainEconomic benefit, and implemented the techno-economic policy that country economizes on resources, green is produced.
The object of the invention is to: provide discarded concrete that a kind of employing contains a small amount of brickbat as simple grain level coarse aggregateReplace part natural coarse aggregate and prepare the method for the self-compacting concrete of regenerating, reduce building waste, economize on resources, reduction is produced intoThis.
The raw material composition of C40 level simple grain level regeneration self-compacting concrete of the present invention comprises: cement, regenerated coarse aggregate, naturalCoarse aggregate, fine aggregate, water, additional water, flyash and additive, press cement weight than being cement: regeneration slightly between each material compositionAggregate: natural coarse aggregate: fine aggregate: water: additional water: flyash: additive=1: (0.63～1.38): (0.61～1.48):1.71: 0.40: (0.03～0.07): 0.25: (0.007～0.010), wherein water-cement ratio is 0.32. Further, described coagulationBetween each material composition of soil, be specially cement by cement weight ratio: regenerated coarse aggregate: natural coarse aggregate: fine aggregate: water: additionalWater: flyash: additive=1: 0.63: 1.48: 1.71: 0.40: 0.03: 0.25: 0.010, wherein water-cement ratio is 0.32. Enter oneStep, between described concrete each material composition, be specially cement by cement weight ratio: regenerated coarse aggregate: natural coarse aggregate: thinAggregate: water: additional water: flyash: additive=1: 1.02: 1.02: 1.71: 0.40: 0.05: 0.25: 0.008, wherein water-cement ratioBe 0.32. Further, between described concrete each material composition, be specially cement by cement weight ratio: regenerated coarse aggregate: daySo coarse aggregate: fine aggregate: water: additional water: flyash: additive=1: 1.38: 0.61: 1.71: 0.40: 0.07: 0.25:0.007, wherein water-cement ratio is 0.32.
In described building demolition thing discarded concrete as regenerated coarse aggregate Substitute For Partial natural rubble as coarse aggregateSubstitution rate be 30%～70%. Described regenerated coarse aggregate be contain a small amount of brickbat discarded concrete after jaw crushing crusher machineThe particle diameter obtaining through screening is again the simple grain grating of 10mm～20mm.
The invention still further relates to a kind of C40 level simple grain level regeneration self-compacting concrete preparation method, comprise the following steps:
(1) by the discarded concrete process sorting in building waste, broken and screening, screen out and be less than 9.50mm and be greater thanAfter the particle of 20mm, be processed into regenerated coarse aggregate with aggregate size in 10mm～20mm particle diameter section;
(2) for preventing sticky pot, take each material appropriate, mixing concrete, treats that mixer inwall is stained with cement mortar, takes outConcrete, takes cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and additional by match ratioAgent, feeds intake and then starts and stir according to the order of regenerated coarse aggregate, natural coarse aggregate, fine aggregate, cement, flyash and additiveMachine, dry mixing 1min～2min;
(3) add load weighted water and additional water, continue to stir 1min～2min.
The invention belongs to building material technical field, the discarded concrete conduct that provides a kind of utilization to contain a small amount of brickbatSimple grain level regenerated coarse aggregate replaces the method that part natural coarse aggregate is prepared C40 level self-compacting concrete. This regeneration self-compaction is mixedSolidifying soil is made up of following component, and raw material composition comprises: cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water,Flyash and additive, press cement weight than being cement: regenerated coarse aggregate: natural coarse aggregate: fine aggregate: water between each material composition: additional water: flyash: additive=1: (0.63～1.38): (0.61～1.48): 1.71:0.40: (0.03～0.07): 0.25: (0.007～0.010), wherein water-cement ratio is 0.32. Have well according to the C40 level self-compacting concrete of above method preparationMobility, gap trafficability characteristic, education resistance, meet requirement of strength. When constructability, reduce concrete production cost,Preparation method is simple, is applicable to suitability for industrialized production.
With respect to scheme of the prior art, advantage of the present invention is:
The C40 level simple grain level regeneration self-compacting concrete that the present invention produces, material used uses except normal concreteOutside cement, stone, sand and four kinds of raw materials of water, also comprise the discarded concrete simple grain level regenerated coarse aggregate, the powder that contain a small amount of brickbatCoal ash and efficient polycarboxylate water-reducer. The mobility of prepared regeneration self-compacting concrete, fillibility, education resistance, through timeLoss and intensity all meet related request. When constructability, reduce concrete production cost. Meanwhile, can also solve and buildThe problem of building refuse processing, the pressure of alleviation resource exhaustion, environmental protection, preparation method is simple, is applicable to suitability for industrialized production.
Detailed description of the invention
Below in conjunction with specific embodiment, such scheme is described further. Should be understood that these embodiment are for explanationThe present invention and be not limited to limit the scope of the invention. The implementation condition adopting in embodiment can be done according to the condition of concrete producerFurther adjust, not marked implementation condition is generally the condition in normal experiment.
Embodiment:
(1) prepare raw material:
Cement: PO42.5 Portland cement, apparent density is 3.10g/cm3。
Flyash: 1 grade of flyash, apparent density 2.04g/cm3。
Sand: the medium sand that modulus of fineness is 2.36, apparent density is 2.65g/cm3, bulk density is 1.45g/cm3, moisture contentBe 0.4%.
Natural coarse aggregate: the rubble of 5～20mm continuous size fraction, apparent density is 2.75g/cm3, bulk density is 1.35g/cm3, water absorption rate is 0.45%.
Regenerated coarse aggregate: the discarded concrete in building waste, through sorting, broken and screening, is screened out and is less than 9.50mmBe greater than after the particle of 20mm, be processed into regenerated coarse aggregate with aggregate size in 10mm～20mm particle diameter section, apparent density is2.35g/cm3, bulk density is 1.23g/cm3, water absorption rate is 4.76%.
Additive: high-efficiency water-reducing agent of poly-carboxylic acid.
Water: running water.
(2) for preventing sticky pot, take each material appropriate, mixing concrete, treats that mixer inwall is stained with cement mortar, takes outFresh concrete, takes cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and outer by match ratioAdd agent, feed intake and then start and stir according to the order of regenerated coarse aggregate, natural coarse aggregate, fine aggregate, cement, flyash and additiveMix machine, dry mixing 1min～2min;
(3) add load weighted water and additional water, continue to stir 1min～2min.
C40 level simple grain level self-compaction regeneration concrete match ratio is as follows:
Test data:
Above-mentioned example is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art beCan understand content of the present invention and implement according to this, can not limit the scope of the invention with this. All according to the present invention essenceEquivalent transformation or modification that god's essence is done, within all should being encompassed in protection scope of the present invention.
Claims (8)
1. a C40 level simple grain level regeneration self-compacting concrete, is characterized in that the raw material components of described self-compacting concrete isCement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and additive, described regenerated coarse aggregate be byDiscarded concrete in building waste, through sorting, broken and screening, is removed and is less than 9.50mm and is greater than after the particle of 20mm, processingMake the simple grain graded aggregate of aggregate size scope at 10～20mm, and the water-cement ratio of self-compacting concrete is 0.32; Wherein pressParts by weight calculate raw material components:
Cement 1 parts by weight;
Regenerated coarse aggregate 0.63～1.38 parts by weight;
Natural coarse aggregate 0.61～1.48 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.03～0.07 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.007～0.010 parts by weight.
2. C40 level simple grain level regeneration self-compacting concrete according to claim 1, is characterized in that described self-compaction coagulationSoil calculates raw material components by weight:
Cement 1 parts by weight;
Regenerated coarse aggregate 0.63～1.02 parts by weight;
Natural coarse aggregate 1.02～1.48 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.03～0.07 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.007～0.010 parts by weight.
3. C40 level simple grain level regeneration self-compacting concrete according to claim 1, is characterized in that described self-compaction coagulationSoil calculates raw material components by weight:
Cement 1 parts by weight;
Regenerated coarse aggregate 1.02～1.38 parts by weight;
Natural coarse aggregate 0.61～1.02 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.03～0.07 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.007～0.010 parts by weight.
4. C40 level simple grain level regeneration self-compacting concrete according to claim 1, is characterized in that described self-compaction coagulationSoil calculates raw material components by weight:
Cement 1 parts by weight;
Regenerated coarse aggregate 0.63 parts by weight;
Natural coarse aggregate 1.48 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.03 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.010 parts by weight.
5. C40 level simple grain level regeneration self-compacting concrete according to claim 1, is characterized in that described self-compaction coagulationSoil calculates raw material components by weight:
Cement 1 parts by weight;
Regenerated coarse aggregate 1.02 parts by weight;
Natural coarse aggregate 1.02 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.05 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.008 parts by weight.
6. C40 level simple grain level regeneration self-compacting concrete according to claim 1, is characterized in that described self-compaction coagulationSoil calculates raw material components by weight:
Cement 1 parts by weight;
Regenerated coarse aggregate 1.38 parts by weight;
Natural coarse aggregate 0.61 parts by weight;
Fine aggregate 1.71 parts by weight;
Water 0.40 parts by weight;
Additional water 0.07 parts by weight;
Flyash 0.25 parts by weight;
Additive 0.007 parts by weight.
7. C40 level simple grain level according to claim 1 regeneration self-compacting concrete, is characterized in that described fine aggregate isSand; Described cement is PO42.5 Portland cement; Described flyash is I level flyash.
8. a preparation method for the regeneration of the C40 level simple grain level described in claim 1～7 any one self-compacting concrete, itsBe characterised in that and said method comprising the steps of:
(1) preparation of regenerated coarse aggregate: through sorting, broken and screening, removal is less than by the discarded concrete in building waste9.50mm and being greater than after the particle of 20mm, is processed into aggregate size scope and is the thick bone of regeneration in the particle diameter section of 10～20mmMaterial;
(2) take cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and additional by match ratioAgent, feeds intake and then starts and stir according to the order of regenerated coarse aggregate, natural coarse aggregate, fine aggregate, cement, flyash and additiveMachine, dry mixing 1～2min;
(3) add load weighted water and additional water, continue to stir 1～2min and obtain described C40 level simple grain level regeneration certainlyAir-free concrete.
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Effective date of registration: 20190227 Address after: 212000 No. 17 Huangshan South Road, Zhenjiang City, Jiangsu Province Patentee after: Zhenjiang Construction Group Co., Ltd. Address before: 215600 New Science and Education City of Changxing Road, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: INDUSTRY TECHNOLOGY RESEARCH INSTITUTE, ZHANGJIAGANG JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY |