CN109704676A - A kind of impervious regeneration concrete and preparation method thereof - Google Patents

A kind of impervious regeneration concrete and preparation method thereof Download PDF

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Publication number
CN109704676A
CN109704676A CN201910050529.7A CN201910050529A CN109704676A CN 109704676 A CN109704676 A CN 109704676A CN 201910050529 A CN201910050529 A CN 201910050529A CN 109704676 A CN109704676 A CN 109704676A
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parts
coarse aggregate
concrete
water
regenerated coarse
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高宜信
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Jiangsu Shengda Fei Building Materials Co Ltd
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Jiangsu Shengda Fei Building Materials Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a kind of impervious regeneration concretes and preparation method thereof, belong to technical field of concrete, its key points of the technical solution are that a kind of impervious regeneration concrete, including following component: cement, coarse aggregate, regenerated coarse aggregate, fine aggregate, flyash, slag powders, water-reducing agent, composite expanding agent and water;Based on parts by weight, the composite expanding agent includes 25-30 parts of gypsum, 5-10 parts of bauxite, 10-20 parts of calcium oxide, 6-8 parts of sepiolite powder, 6-8 parts of silicon powder and 4-6 parts of redispersible latex powder.The present invention replaces part of coarse aggregates using regenerated coarse aggregate, and the recycling of resource may be implemented;By composite expanding agent and cementitious material, gather materials and the mixing of water-reducing agent, it is possible to reduce the hole of concrete improves the compactness of concrete, improves the anti-permeability performance of concrete, improves the service life of concrete.

Description

A kind of impervious regeneration concrete and preparation method thereof
Technical field
The present invention relates to technical field of concrete, more specifically, it is related to a kind of impervious regeneration concrete and its preparation Method.
Background technique
Common concrete, which refers to, makees cementitious material with cement, with sand, masonry aggregate, according to demand, after adding additive Cooperate by a certain percentage with water, it is agitated obtained by cement concrete;It is at low cost due to the abundant raw materials of concrete, have Good plasticity, therefore the yield of the annual concrete in China is in incremental trend.But with the development that China modernizes, newly The construction in city and the transformation in old city can be such that concrete debris gradually increases, therefore recycling for concrete debris is also got over It is more taken seriously, which also promotes the development of regeneration concrete.
Regeneration concrete refers to discarded concrete block after broken, cleaning, classification, is compounded by a certain percentage with grade It closes, partly or entirely replaces the natural aggregates such as sandstone, add novel concrete made of cement, water etc. are matched.Regeneration concrete is pressed The combining form gathered materials can have following several situations: gather materials all regenerated aggregates;Coarse aggregate is regenerated aggregate, fine aggregate is Natural sand;Coarse aggregate is natural rubble or cobble, fine aggregate are regenerated aggregate;Regenerated aggregate substitutes part coarse aggregate or thin collection Material.
Compared with natural aggregate, the inside of regenerated aggregate has a large amount of microscopic checks, and porosity is larger, this causes by regenerating Concrete impermeability made of gathering materials is poor, this can reduce the durability of concrete mix, and influence concrete uses the longevity Life, therefore the anti-permeability performance of concrete how is improved, it is a problem to be solved.
Summary of the invention
One of the objects of the present invention is to provide a kind of impervious regeneration concretes, replace portion by using regenerated coarse aggregate Divide coarse aggregate, the recycling of resource may be implemented;By composite expanding agent and cementitious material, gather materials and the mixing of water-reducing agent, The hole that concrete can be reduced improves the compactness of concrete, improves the anti-permeability performance of concrete, improves the use of concrete Service life.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of impervious regeneration concrete, based on parts by weight, including following component: 130-150 parts of cement, coarse aggregate 450-470 Part, 400-420 parts of regenerated coarse aggregate, 500-520 parts of fine aggregate, 60-80 parts of flyash, 40-60 parts of slag powders, water-reducing agent 5-7 Part, 10-20 parts of composite expanding agent and 130-140 parts of water;
Based on parts by weight, the composite expanding agent includes 25-30 parts of gypsum, 5-10 parts of bauxite, 10-20 parts of calcium oxide, sea 6-8 parts of afrodite powder, 6-8 parts of silicon powder and 4-6 parts of redispersible latex powder.
By using above-mentioned technical proposal, part of coarse aggregates is replaced using regenerated coarse aggregate, the sharp again of resource may be implemented With;By composite expanding agent and cementitious material, gather materials and the mixing of water-reducing agent, it is possible to reduce the hole of concrete improves mixed The compactness for coagulating soil, improves the anti-permeability performance of concrete, improves the service life of concrete.
Further, the composite expanding agent is prepared with the following method: by 25-30 parts of gypsum, 5-10 parts of bauxite, oxygen Change 6-8 parts of calcium 10-20 parts, 6-8 parts of sepiolite powder and silicon powder grinding 20-30min, adds 4-6 parts of redispersible creams Rubber powder continues to grind 30-40min, after crossing the screening of 600-800 mesh, obtains composite expanding agent.
By using above-mentioned technical proposal, composite expanding agent has expansion rate compatible with concrete, it is ensured that Stable and lasting expansion, filling concrete shrinks the gap generated, and composite expanding agent also contributes to gather materials and cement Cohesive force, further increase the compactness of concrete, improve the anti-permeability performance of concrete.
Further, the coarse aggregate is the natural rubble of 5-25mm continuous grading, clay content < 1%.
By using above-mentioned technical proposal, the natural rubble of continuous grading can accumulate the overlap joint bone to form dense packing effect Frame reduces the porosity of concrete, improves the intensity of concrete, to improve the anti-permeability performance of concrete.
Further, the apparent density of the regenerated coarse aggregate is 2680-2700kg/m3, clay content < 2.0%, water absorption rate For 4.0-4.5%.
By using above-mentioned technical proposal, the clay content and water absorption rate of regenerated coarse aggregate are controlled, concrete can be improved Performance stability.
Further, the fine aggregate is sand in IIth area, apparent density 2650-2670kg/m3, particle diameter 0.5- 0.25mm, clay content < 1.0%.
By using above-mentioned technical proposal, the gradation of sand is preferable in IIth area, and particle is more rounded, smooth, particle shape is good, It is preferable with the workability of concrete mix, it can be filled into the gap between cement and coarse aggregate, reduce the sky of concrete Gap improves the anti-permeability performance of concrete.
Further, the flyash is I grade of flyash of F class, and the fineness (45 μm of square hole screens tail over) < 6% of flyash needs Water ratio < 95%, loss on ignition < 3.5%, water content < 0.2%.
By using above-mentioned technical proposal, contain volcano active constituent in flyash, it is possible to reduce the dosage of cement reduces The heat of hydration of cement;By control fineness of pulverized-coal ash, water demand ratio, loss on ignition and water content, allow flyash fill to In the gap of concrete, the compactness of concrete is improved, improves the anti-permeability performance of concrete;Flyash can also improve concrete Mobility, cohesiveness and the water-retaining property of mix make concrete mix be easy to pump, pouring molding, and can reduce the slump Gradual loss.
Further, the slag powders are S95 grade slag powder, density 2.8-3.0g/cm3, specific surface area 420- 450m2/ kg, activity index (7d) are 85-90%, and activity index (28d) is 95-100%, fluidity ratio >=95%, water content For 0.2-0.6%.
By using above-mentioned technical proposal, the addition of slag powders can reduce water consumption, reduce the dosage of cement, reduce water The heat of hydration of mud, slag powders have good chemical activity, and slag powders can be filled into the cement in concrete after mixing with water In gap between fine aggregate, the compactness of concrete is improved, improves the anti-permeability performance of concrete.
Further, the water-reducing agent is polycarboxylate high performance water-reducing agent.
By using above-mentioned technical proposal, polycarboxylic acid series high efficiency water reducing agent belongs to the high efficiency water reducing agent of a new generation, can drop Low water usage amount reduces the dosage of cement, and small on the influence of other performances of concrete, has absorption dispersion, wetting and lubricates Effect, the workability of concrete can be improved.
The second object of the present invention is to provide a kind of preparation method of impervious regeneration concrete.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of preparation method of impervious regeneration concrete, includes the following steps:
S1: being crushed discarded concrete, and the prefabricated regenerated coarse aggregate that partial size is 5-25mm is obtained after screening;
S2: prefabricated regenerated coarse aggregate being placed in acid maceration extract and impregnates 2-3h, prefabricated regenerated coarse aggregate and acid maceration extract Weight ratio is 1:2;Then prefabricated regenerated coarse aggregate is immersed in the water 10-20s, taking-up drains 4-5h, then places it in 80-90 1-2h is toasted at a temperature of DEG C, obtains regenerated coarse aggregate;
S3: based on parts by weight, by 130-150 parts of cement, 450-470 parts of coarse aggregate, 400-420 parts of regenerated coarse aggregate, thin bone 500-520 parts of material, 60-80 parts of flyash, 40-60 parts of slag, 5-7 parts of water-reducing agent, 10-20 parts of composite expanding agent and 130- 140 parts of water, stir evenly, and obtain impervious regeneration concrete.
By using above-mentioned technical proposal, prefabricated regenerated coarse aggregate is after the immersion of peracidity maceration extract, acid maceration extract In H+It can be reacted with the cement-hydrate on prefabricated regenerated coarse aggregate, remove the sand being wrapped in outside prefabricated regenerated coarse aggregate Slurry, reduces its surface roughness, improves the surface property of prefabricated regenerated coarse aggregate, regenerated coarse aggregate and each original after treatment Material mixing, can improve the workability of concrete mix.
Further, the acid maceration extract is prepared with the following method: based on parts by weight, by 10-20 parts of carboxymethyls Cellulose is added in the dilution heat of sulfuric acid of 80-90 parts of 30-40wt%, stirs 10-15min with the speed of 300-400r/min, Suspension is made, 30-40 parts of nano silicas and 2-4 parts of dodecyl dimethyl oxidations then will be added in suspension Amine stirs 10-20min with the speed of 300-400r/min, obtains acid maceration extract.
H by using above-mentioned technical proposal, in acid maceration extract+It can remove and be wrapped in outside prefabricated regenerated coarse aggregate Mortar reduces its surface roughness;And carboxymethyl cellulose, nano silica and dodecyl in acid maceration extract Dimethyl amine can be filled into the fine cracks of regenerated coarse aggregate, reduce the porosity and water suction of regenerated coarse aggregate Rate improves the intensity of regenerated coarse aggregate, so as to improve the intensity and anti-permeability performance of concrete.
In conclusion the present invention has the advantages that compared with the prior art
1. replacing part of coarse aggregates using regenerated coarse aggregate, the recycling of resource may be implemented;Pass through composite expanding agent and gelling Material gathers materials and the mixing of water-reducing agent, it is possible to reduce the hole of concrete improves the compactness of concrete, improves concrete Anti-permeability performance, improve the service life of concrete;
2. composite expanding agent has expansion rate compatible with concrete, it is ensured that water is filled in stable and lasting expansion Mud shrinks the gap generated, and composite expanding agent also contributes to the cohesive force gathered materials with cement, further increases coagulation The compactness of soil, improves the anti-permeability performance of concrete;
3. the H in acid maceration extract+The mortar being wrapped in outside prefabricated regenerated coarse aggregate can be removed, its surface roughness is reduced; And carboxymethyl cellulose, nano silica and the dodecyldimethylamine oxide in acid maceration extract can fill to In the fine cracks of regenerated coarse aggregate, the porosity and water absorption rate of regenerated coarse aggregate are reduced, the intensity of regenerated coarse aggregate is improved, So as to improve the intensity and anti-permeability performance of concrete.
Specific embodiment
Invention is further described in detail below.
One, the gypsum in the following preparation example of the preparation example of composite expanding agent is selected from the production of Chemical Co., Ltd.'s Jinan tomorrow The technical grade land plaster that article No. is 01;Bauxite is selected from the aluminium alum that the article No. of Lingshou County dragon gold mine product process plants is 1810 Soil;Sepiolite powder is selected from the sepiolite powder that the article No. of Lingshou County dragon gold mine product process plants is 1809;Silicon powder is selected from normal The silicon powder that the article No. of Zhou Rongao new chemical materials Co., Ltd production is RA-sp1250;Redispersible latex powder uses moral The 5010N type redispersible latex powder of state watt gram production.
The preparation example 1 of composite expanding agent: by gypsum 25kg, bauxite 5kg, calcium oxide 10kg, sepiolite powder 6kg and silicon 4kg redispersible latex powder is added after grinding 20min in micro mist 6kg, continues to grind 300min, after crossing the screening of 600 meshes, obtains Composite expanding agent.
The preparation example 2 of composite expanding agent: by gypsum 27.5kg, bauxite 7.5kg, calcium oxide 15kg, sepiolite powder 7kg with And 5kg redispersible latex powder is added after silicon powder 7kg grinding 25min, and continue to grind 35min, after crossing the screening of 700 meshes, Obtain composite expanding agent.
The preparation example 3 of composite expanding agent: by gypsum 30kg, bauxite 10kg, calcium oxide 20kg, sepiolite powder 8kg and 6kg redispersible latex powder is added after grinding 30min in silicon powder 8kg, continues to grind 40min, after crossing the screening of 800 meshes, obtains To composite expanding agent.
The preparation example 4 of composite expanding agent: this preparation example and the preparation example of composite expanding agent 1 the difference is that, raw material In be not added with redispersible latex powder.
Two, the carboxymethyl cellulose in the following preparation example of preparation example of acid maceration extract is selected from the more more new materials of U.S. in Guangzhou The carboxymethyl cellulose that the article No. of Co., Ltd's production is CA-F03;Nano silica is selected from the model of Germany watt gram production The nano silica of N20;Dodecyldimethylamine oxide is the model of Guangzhou Hong Lin Chemical Industry Science Co., Ltd production The dodecyldimethylamine oxide of OB-02.
The preparation example 1 of acid maceration extract: 10kg carboxymethyl cellulose is added to the dilution heat of sulfuric acid of 80kg, 30wt% In, 10min is stirred with the speed of 300r/min, suspension is made, then will be added in suspension 30kg nano silica with And 2kg dodecyldimethylamine oxide, 10min is stirred with the speed of 300r/min, obtains acid maceration extract.
The preparation example 2 of acid maceration extract: 15kg carboxymethyl cellulose is added to the dilution heat of sulfuric acid of 85kg, 35wt% In, 12.5min is stirred with the speed of 350r/min, suspension is made, 35kg nano silica then will be added in suspension And 3kg dodecyldimethylamine oxide, 15min is stirred with the speed of 350r/min, obtains acid maceration extract.
The preparation example 3 of acid maceration extract: 20kg carboxymethyl cellulose is added to the dilution heat of sulfuric acid of 90kg, 40wt% In, 15min is stirred with the speed of 400r/min, suspension is made, then will be added in suspension 40kg nano silica with And 4kg dodecyldimethylamine oxide, 20min is stirred with the speed of 400r/min, obtains acid maceration extract.
The preparation example 4 of acid maceration extract: this preparation example and the preparation example 1 of acid maceration extract the difference is that, raw material In be not added with carboxymethyl cellulose, nano silica and dodecyldimethylamine oxide.
The preparation example 5 of acid maceration extract: this preparation example and the preparation example 1 of acid maceration extract the difference is that, raw material In be not added with carboxymethyl cellulose and dodecyldimethylamine oxide.
The preparation example 6 of acid maceration extract: this preparation example and the preparation example 1 of acid maceration extract the difference is that, raw material In be not added with dodecyldimethylamine oxide.
Three, the poly carboxylic acid series water reducer in embodiment following embodiment is raw selected from Quzhou Xi Weimai building materials Science and Technology Ltd. The XF-25 type high-efficiency water-reducing agent of poly-carboxylic acid of production.
Embodiment 1: a kind of impervious regeneration concrete is prepared with the following method:
S1: being crushed discarded concrete, and the prefabricated regenerated coarse aggregate that partial size is 5-25mm is obtained after screening;
S2: prefabricated regenerated coarse aggregate being placed in acid maceration extract and impregnates 2h, the weight of prefabricated regenerated coarse aggregate and acid maceration extract Amount is than being 1:2;Then prefabricated regenerated coarse aggregate is immersed into 10s in clear water, taking-up drains 4h, then places it in 80 DEG C of temperature Lower baking 1h, obtains regenerated coarse aggregate;Acid maceration extract is selected from acid maceration extract prepared by the preparation example 1 of acid maceration extract;
S3: by the ordinary portland cement 130kg, coarse aggregate 450kg, regenerated coarse aggregate 400kg, fine aggregate of P.O.42.5 500kg, flyash 60kg, slag 40kg, polycarboxylic acid series high efficiency water reducing agent 5kg, composite expanding agent 10kg and 130kg water, are stirred It mixes uniformly, obtains impervious regeneration concrete;Composite expanding agent is selected from composite expanding agent prepared by the preparation example 1 of composite expanding agent;
Wherein, coarse aggregate is the natural rubble of 5-25mm continuous grading, clay content < 1%;The apparent density of regenerated coarse aggregate is 2680kg/m3, clay content < 2.0%, water absorption rate 4.0%;Fine aggregate is sand in IIth area, apparent density 2650kg/m3, particle Diameter is 0.5-0.25mm, clay content < 1.0%;Flyash is I grade of flyash of F class, fineness (45 μm of square hole screen sieves of flyash It is remaining) < 6%, water demand ratio < 95%, loss on ignition < 3.5%, water content < 0.2%;Slag powders are S95 grade slag powder, and density is 2.8g/cm3, specific surface area 420m2/ kg, activity index (7d) they are 85%, and activity index (28d) is 95%, fluidity ratio >= 95%, water content 0.2%.
Embodiment 2: a kind of impervious regeneration concrete is prepared with the following method:
S1: being crushed discarded concrete, and the prefabricated regenerated coarse aggregate that partial size is 5-25mm is obtained after screening;
S2: prefabricated regenerated coarse aggregate being placed in acid maceration extract and impregnates 2.5h, prefabricated regenerated coarse aggregate and acid maceration extract Weight ratio is 1:2;Then prefabricated regenerated coarse aggregate is immersed into 15s in clear water, taking-up drains 4.5h, then places it in 85 DEG C At a temperature of toast 1.5, obtain regenerated coarse aggregate;Acid dipping prepared by the preparation example 2 that acid maceration extract is selected from acid maceration extract Liquid;
S3: by the ordinary portland cement 140kg, coarse aggregate 460kg, regenerated coarse aggregate 410kg, fine aggregate of P.O.42.5 510kg, flyash 70kg, slag 50kg, polycarboxylic acid series high efficiency water reducing agent 6kg, composite expanding agent 15kg and 135kg water, are stirred It mixes uniformly, obtains impervious regeneration concrete;Composite expanding agent is selected from composite expanding agent prepared by the preparation example 2 of composite expanding agent;
Wherein, coarse aggregate is the natural rubble of 5-25mm continuous grading, clay content < 1%;The apparent density of regenerated coarse aggregate is 2410kg/m3, clay content < 2.0%, water absorption rate 4.25%;Fine aggregate is sand in IIth area, apparent density 2660kg/m3, Grain diameter is 0.5-0.25mm, clay content < 1.0%;Flyash is I grade of flyash of F class, fineness (45 μm of square hole screens of flyash Tail over) < 6%, water demand ratio < 95%, loss on ignition < 3.5%, water content < 0.2%;Slag powders are S95 grade slag powder, and density is 2.9g/cm3, specific surface area 435m2/ kg, activity index (7d) they are 88%, and activity index (28d) is 98%, fluidity ratio >= 95%, water content 0.4%.
Embodiment 3: a kind of impervious regeneration concrete is prepared with the following method:
S1: being crushed discarded concrete, and the prefabricated regenerated coarse aggregate that partial size is 5-25mm is obtained after screening;
S2: prefabricated regenerated coarse aggregate being placed in acid maceration extract and impregnates 3h, the weight of prefabricated regenerated coarse aggregate and acid maceration extract Amount is than being 1:2;Then prefabricated regenerated coarse aggregate is immersed into 20s in clear water, taking-up drains 5h, then places it in 90 DEG C of temperature Lower baking 2h, obtains regenerated coarse aggregate;Acid maceration extract is selected from acid maceration extract prepared by the preparation example 3 of acid maceration extract;
S3: by the ordinary portland cement 150kg, coarse aggregate 470kg, regenerated coarse aggregate 420kg, fine aggregate of P.O.42.5 520kg, flyash 80kg, slag 60kg, polycarboxylic acid series high efficiency water reducing agent 7kg, composite expanding agent 20kg and 140kg water, are stirred It mixes uniformly, obtains impervious regeneration concrete;Composite expanding agent is selected from composite expanding agent prepared by the preparation example 3 of composite expanding agent;
Wherein, coarse aggregate is the natural rubble of 5-25mm continuous grading, clay content < 1%;The apparent density of regenerated coarse aggregate is 2420kg/m3, clay content < 2.0%, water absorption rate 4.5%;Fine aggregate is sand in IIth area, apparent density 2670kg/m3, particle Diameter is 0.5-0.25mm, clay content < 1.0%;Flyash is I grade of flyash of F class, fineness (45 μm of square hole screen sieves of flyash It is remaining) < 6%, water demand ratio < 95%, loss on ignition < 3.5%, water content < 0.2%;Slag powders are S95 grade slag powder, and density is 3.0g/cm3, specific surface area 450m2/ kg, activity index (7d) they are 90%, and activity index (28d) is 100%, fluidity ratio >= 95%, water content 0.6%.
Four, comparative example comparative example 1: the difference of this comparative example and embodiment 1 is pointed out to be, is not added in raw material composite expanded Agent.
Comparative example 2: the difference of this comparative example and embodiment 1 points out to be, the composite expanding agent in raw material is selected from compound swollen Composite expanding agent prepared by the preparation example 4 of swollen dose of preparation example.
Comparative example 3: the difference of this comparative example and embodiment 1 points out to be, the acid maceration extract in S2 is selected from acid dipping Acid maceration extract prepared by the preparation example 4 of liquid.
Comparative example 4: the difference of this comparative example and embodiment 1 points out to be, the acid maceration extract in S2 is selected from acid dipping Acid maceration extract prepared by the preparation example 5 of liquid.
Comparative example 5: the difference of this comparative example and embodiment 1 points out to be, the acid maceration extract in S2 is selected from acid dipping Acid maceration extract prepared by the preparation example 6 of liquid.
Five, performance test: by the performance of embodiment 1-3 and comparative example the 1-5 concrete prepared as follows into Row test, test result is shown in table 1.
1. Anti-Chloride Ion Penetration: according to GB/T50082-2009, " normal concrete long-term behaviour and endurance quality are tried Test method standard " in quick chloride ion transport Y-factor method Y testing standard test block chloride ion penetration depth.
2. water resistant permeance property: according to GB/T50082-2009 " common coagulation scholar long-term behaviour and endurance quality test side Method standard " in the testing standard test block of pressurization step by step infiltration depth.
3. impermeability pressure: according to GB/T50082-2009 " common coagulation scholar long-term behaviour and endurance quality test method mark It is quasi- " impermeability pressure of testing standard test block.
4. compression strength: making standard according to GB/T50081-2016 " common coagulation scholar mechanical test method standard " Test block, and the compression strength of measurement standard test block maintenance 1d, 7d and 28d.
5. early anti-cracking behavior energy: being made according to GB/T50081-2016 " common coagulation scholar mechanical test method standard " Reference block, calculating concrete casting, measurement obtains total cracking in the crack number and unit area of unit area afterwards for 24 hours Area.
Table 1
As can be seen from the above data, concrete prepared by the present invention has good waterproof, impervious salt performance, have excellent Impermeability pressure and early anti-cracking behavior energy, and have preferable compression strength.
It is not added with composite expanding agent in comparative example 1, compared to embodiment 1, concrete is waterproof, impervious in comparative example 1 Salt, impermeability pressure, compression strength and early anti-cracking behavior can be decreased obviously, and illustrate that the composite expanding agent in the present invention can be bright It is aobvious to improve the impervious of concrete, cracking resistance and compression strength.
It is not added with redispersible latex powder in composite expanding agent in comparative example 2, compared to embodiment 1, in comparative example 2 Waterproof, impervious salt, impermeability pressure, compression strength and the early anti-cracking behavior of concrete can be decreased obviously, and be illustrated compound swollen Redispersible latex powder in swollen dose helps to improve the impervious of concrete, cracking resistance and compression strength.
Carboxymethyl cellulose, nano silica and dodecyl two are not included in acid maceration extract in comparative example 3 Methyl oxidation amine, compared to embodiment 1, waterproof, impervious salt, impermeability pressure and the compression strength of concrete in comparative example 3 It is decreased obviously, illustrates when handling prefabricated regenerated coarse aggregate, carboxymethyl cellulose, nano silica and 12 Alkyl dimethyl amine oxide is filled into the hole of regenerated coarse aggregate, and the compactness and intensity of regenerated coarse aggregate are improved, thus Improve the anti-permeability performance and compression strength of concrete.
Carboxymethyl cellulose and dodecyldimethylamine oxide, phase are not included in acid maceration extract in comparative example 4 Compared with embodiment 1, waterproof, impervious salt, impermeability pressure and the compression strength of concrete are decreased obviously in comparative example 4, phase Compared with comparative example 3, waterproof, impervious salt, impermeability pressure and the compression strength of concrete have changing more by a small margin in comparative example 4 It is kind, illustrate that the nano silica in acid maceration extract can improve the intensity and compactness of regenerated coarse aggregate, if but only When comprising nano silica, nano silica is poor in the dispersibility of dilute sulfuric acid, to the filling effect of regenerated coarse aggregate compared with Difference.
Dodecyldimethylamine oxide is not included in acid maceration extract in comparative example 5, compared to comparative example 4, comparison Waterproof, impervious salt, impermeability pressure and the compression strength of concrete make moderate progress in example 5, illustrate that carboxymethyl cellulose can be with The dispersibility for improving nano silica, improves the suspension of nano silica, can fill into regenerated coarse aggregate, Improve the intensity and compactness of regenerated coarse aggregate;Waterproof, impervious salt, impermeability pressure and compression strength is still in comparative example 5 Lower than the above-mentioned performance of embodiment, illustrate that dodecyldimethylamine oxide can promote the peptizaiton of carboxymethyl cellulose, Dodecyldimethylamine oxide and carboxymethyl cellulose and used time, which have, to act synergistically, and can significantly improve the impervious of concrete Performance and compression strength.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this All by the protection of Patent Law in the scope of the claims of invention.

Claims (10)

1. a kind of impervious regeneration concrete, it is characterised in that: based on parts by weight, including following component:
130-150 parts of cement, 450-470 parts of coarse aggregate, 400-420 parts of regenerated coarse aggregate, 500-520 parts of fine aggregate, flyash 60-80 parts, 40-60 parts of slag powders, 5-7 parts of water-reducing agent, 10-20 parts of composite expanding agent and 130-140 parts of water;
Based on parts by weight, the composite expanding agent includes 25-30 parts of gypsum, 5-10 parts of bauxite, 10-20 parts of calcium oxide, sea 6-8 parts of afrodite powder, 6-8 parts of silicon powder and 4-6 parts of redispersible latex powder.
2. a kind of impervious regeneration concrete according to claim 1, it is characterised in that: the composite expanding agent is using as follows Method preparation: by 25-30 parts of gypsum, 5-10 parts of bauxite, 10-20 parts of calcium oxide, 6-8 parts of sepiolite powder and silicon powder 6-8 Part grinding 20-30min, adds 4-6 parts of redispersible latex powders, continues to grind 30-40min, crosses the screening of 600-800 mesh Afterwards, composite expanding agent is obtained.
3. a kind of impervious regeneration concrete according to claim 1, it is characterised in that: the coarse aggregate is that 5-25mm is continuous The natural rubble of gradation, clay content < 1%.
4. a kind of impervious regeneration concrete according to claim 1, it is characterised in that: the regenerated coarse aggregate it is apparent close Degree is 2680-2700kg/m3, clay content < 2.0%, water absorption rate 4.0-4.5%.
5. a kind of impervious regeneration concrete according to claim 1, it is characterised in that: the fine aggregate is sand in IIth area, Apparent density is 2650-2670kg/m3, particle diameter 0.5-0.25mm, clay content < 1.0%.
6. a kind of impervious regeneration concrete according to claim 1, it is characterised in that: the flyash is I grade of fine coal of F class Ash, the fineness (45 μm of square hole screens tail over) < 6% of flyash, water demand ratio < 95%, loss on ignition < 3.5%, water content < 0.2%.
7. a kind of impervious regeneration concrete according to claim 1, it is characterised in that: the slag powders are S95 grades of slags Powder, density 2.8-3.0g/cm3, specific surface area 420-450m2/ kg, activity index (7d) are 85-90%, activity index (28d) is 95-100%, fluidity ratio >=95%, water content 0.2-0.6%.
8. a kind of impervious regeneration concrete according to claim 1, it is characterised in that: the water-reducing agent is that polycarboxylic-acid is high Performance water-reducing agent.
9. a kind of preparation method of impervious regeneration concrete, characterized by the following steps:
S1: being crushed discarded concrete, and the prefabricated regenerated coarse aggregate that partial size is 5-25mm is obtained after screening;
S2: prefabricated regenerated coarse aggregate being placed in acid maceration extract and impregnates 2-3h, prefabricated regenerated coarse aggregate and acid maceration extract Weight ratio is 1:2;Then prefabricated regenerated coarse aggregate is immersed in the water 10-20s, taking-up drains 4-5h, then places it in 80-90 1-2h is toasted at a temperature of DEG C, obtains regenerated coarse aggregate;
S3: based on parts by weight, by 130-150 parts of cement, 450-470 parts of coarse aggregate, 400-420 parts of regenerated coarse aggregate, thin bone 500-520 parts of material, 60-80 parts of flyash, 40-60 parts of slag, 5-7 parts of water-reducing agent, 10-20 parts of composite expanding agent and 130- 140 parts of water, stir evenly, and obtain impervious regeneration concrete.
10. a kind of preparation method of impervious regeneration concrete according to claim 9, it is characterised in that: the acid leaching Stain liquid is prepared with the following method: based on parts by weight, 10-20 parts of carboxymethyl celluloses being added to 80-90 parts of 30-40wt% Dilution heat of sulfuric acid in, 10-15min is stirred with the speed of 300-400r/min, suspension is made, then will be added in suspension 30-40 parts of nano silicas and 2-4 parts of dodecyldimethylamine oxide stir 10- with the speed of 300-400r/min 20min obtains acid maceration extract.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110156405A (en) * 2019-06-25 2019-08-23 长安大学 A kind of plateau impermeability concrete material and preparation method thereof
CN110818330A (en) * 2019-11-23 2020-02-21 青岛汇鑫混凝土有限公司 Recycled aggregate concrete and preparation method thereof
CN110963763A (en) * 2019-12-25 2020-04-07 青岛康力商砼工程有限公司 Anti-permeability recycled concrete and preparation method thereof
CN111362638A (en) * 2020-03-13 2020-07-03 深圳市金得益建材有限公司 Novel recycled concrete mortar and preparation method thereof
CN111978056A (en) * 2020-08-27 2020-11-24 中国建筑材料科学研究总院有限公司 Modified material of low-quality aggregate and treatment method
CN110156405B (en) * 2019-06-25 2021-10-01 长安大学 Plateau impervious concrete material and preparation method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104446081A (en) * 2014-11-27 2015-03-25 上海申御特种建材有限公司 Concrete expansion agent and preparation method thereof
CN104529338A (en) * 2015-01-12 2015-04-22 杭州绿怡新型建材有限公司 Ultrahigh-strength cement-based grouting material
CN106186953A (en) * 2016-07-17 2016-12-07 临汾市华基新型建材有限公司 A kind of sponge concrete
CN108623266A (en) * 2018-08-13 2018-10-09 武汉华强新型建筑材料有限公司 A kind of regeneration concrete and its production technology
CN108975815A (en) * 2018-08-13 2018-12-11 武汉华强新型建筑材料有限公司 A kind of regeneration concrete manufacture craft
CN109095865A (en) * 2018-10-29 2018-12-28 中国建材检验认证集团北京天誉有限公司 A kind of recycled high performance concrete material and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104446081A (en) * 2014-11-27 2015-03-25 上海申御特种建材有限公司 Concrete expansion agent and preparation method thereof
CN104529338A (en) * 2015-01-12 2015-04-22 杭州绿怡新型建材有限公司 Ultrahigh-strength cement-based grouting material
CN106186953A (en) * 2016-07-17 2016-12-07 临汾市华基新型建材有限公司 A kind of sponge concrete
CN108623266A (en) * 2018-08-13 2018-10-09 武汉华强新型建筑材料有限公司 A kind of regeneration concrete and its production technology
CN108975815A (en) * 2018-08-13 2018-12-11 武汉华强新型建筑材料有限公司 A kind of regeneration concrete manufacture craft
CN109095865A (en) * 2018-10-29 2018-12-28 中国建材检验认证集团北京天誉有限公司 A kind of recycled high performance concrete material and preparation method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110156405A (en) * 2019-06-25 2019-08-23 长安大学 A kind of plateau impermeability concrete material and preparation method thereof
CN110156405B (en) * 2019-06-25 2021-10-01 长安大学 Plateau impervious concrete material and preparation method thereof
CN110818330A (en) * 2019-11-23 2020-02-21 青岛汇鑫混凝土有限公司 Recycled aggregate concrete and preparation method thereof
CN110963763A (en) * 2019-12-25 2020-04-07 青岛康力商砼工程有限公司 Anti-permeability recycled concrete and preparation method thereof
CN111362638A (en) * 2020-03-13 2020-07-03 深圳市金得益建材有限公司 Novel recycled concrete mortar and preparation method thereof
CN111978056A (en) * 2020-08-27 2020-11-24 中国建筑材料科学研究总院有限公司 Modified material of low-quality aggregate and treatment method

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