CN108164208A - A kind of nano silicon dioxide regeneration concrete and preparation method thereof - Google Patents

A kind of nano silicon dioxide regeneration concrete and preparation method thereof Download PDF

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Publication number
CN108164208A
CN108164208A CN201711238375.1A CN201711238375A CN108164208A CN 108164208 A CN108164208 A CN 108164208A CN 201711238375 A CN201711238375 A CN 201711238375A CN 108164208 A CN108164208 A CN 108164208A
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CN
China
Prior art keywords
silicon dioxide
nano silicon
regeneration concrete
water
cement
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Pending
Application number
CN201711238375.1A
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Chinese (zh)
Inventor
许跃青
冯文贤
谢钢
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Guangdong University of Technology
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Guangdong University of Technology
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Priority to CN201711238375.1A priority Critical patent/CN108164208A/en
Publication of CN108164208A publication Critical patent/CN108164208A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02Granular materials, e.g. microballoons
    • C04B14/04Silica-rich materials; Silicates
    • C04B14/06Quartz; Sand
    • C04B14/062Microsilica, e.g. colloïdal silica
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention discloses a kind of nano silicon dioxide regeneration concrete and preparation method thereof, which is prepared by raw material cement, recycled aggregate, fine aggregate, water, nano silicon dioxide and water-reducing agent polycarboxylic acids, the cement:Recycled aggregate:Fine aggregate:Water:Nano silicon dioxide:The mass ratio of water-reducing agent is 1:(3.4~3.8):(1.7~2.1):(0.58~0.63):(0.025~0.035):(0.015~0.02), the ratio of mud of the nano silicon dioxide regeneration concrete is 1:5.1~5.9.Present invention improves the mechanical properties and physical property of regeneration concrete, significantly improve the intensity of regeneration concrete, obtain a kind of New Building Materials, so as to be used widely in the changeable architectural engineering of environment.

Description

A kind of nano silicon dioxide regeneration concrete and preparation method thereof
Technical field
The invention belongs to New Building Materials technical fields, regenerate coagulation more particularly, to a kind of nano silicon dioxide Soil and preparation method thereof.
Background technology
With the development of Chinese Urbanization construction, a large amount of untreated building castoffs be transported to countryside air storage or It is simply lower to fill.Only China in 2016 just produces up to 3,500,000,000 tons of building waste, and comprehensive utilization ratio is right less than 5% Natural ecological environment causes serious pollution and threatens.Building castoff is become into recycled aggregate by processing, can not only be reduced Its environmental pollution brought, and a large amount of land resource can be saved, there is higher economic benefit and social benefit.It is but sharp For regeneration concrete compared with normal concrete, water absorption rate and shrinking percentage are higher made of recycled aggregate, and hole is bigger and strong Spend relatively low, these defects limit the promotion and application of regeneration concrete to a certain extent.
Nano material refers to particle of the grain size between 1~100nm, since hardening of cement slurry is by numerous particle (aquations Gel of calcium silicate) and numerous nano size voids (fault of construction) and larger-size crystallinity hydrated product composition, will have The nano silicon dioxide of corpuscular property and high activity is incorporated into regeneration concrete, and the micropore in hardening of cement slurry can be played Filing effect is effectively improved porosity and pore structure, improves the intensity and durability of regeneration concrete.
Invention content
The purpose of the invention is to overcome defect of the existing technology, a kind of nano silicon dioxide regeneration coagulation is provided Soil.
Another object of the present invention is to provide the preparation method of above-mentioned nano silicon dioxide regeneration concrete.This method energy Enough nano silicon dioxide is allowed to be uniformly distributed among regeneration concrete, reduce the agglomeration of nano silicon dioxide, receive simultaneously Rice silica can fill minute crack and hole in regeneration concrete, improve the compression strength of regeneration concrete, operation Simply, it is highly practical.
Above-mentioned purpose of the present invention is achieved by the following technical programs:
A kind of nano silicon dioxide regeneration concrete is by raw material cement, recycled aggregate, fine aggregate, water, nanometer titanium dioxide Silicon and water-reducing agent are prepared, the cement:Recycled aggregate:Fine aggregate:Water:Nano silicon dioxide:Water-reducing agent polycarboxylic acids Mass ratio is 1:(3.4~3.8):(1.7~2.1):(0.58~0.63):(0.025~0.035):(0.015~0.02), institute The ratio of mud for stating nano silicon dioxide regeneration concrete is 1:5.1~5.9.
Preferably, the cement is 42.5R portland cements.
Preferably, the fine aggregate is the common river sand of continuous grading, and the grain size of the fine aggregate is 1~5mm.
Preferably, the recycled aggregate is the recycled aggregate of continuous grading, the grain size of the recycled aggregate for 1~ 10mm。
Preferably, the grain size of the nano silicon dioxide is 1~50nm, the content of the nano silicon dioxide >= 99%.
Preferably, the water-reducing rate of the polycarboxylic acids is 25~40%.
The preparation method of above-mentioned nano silicon dioxide regeneration concrete, comprises the following specific steps that:
S1. cement, recycled aggregate and fine aggregate are mixing uniformly to form mixture A;
S2. after stirring polycarboxylic acids and water, nano silicon dioxide stirring is added, makes nano silicon dioxide complete Full dispersion, obtains mixed liquid B;
S3. mixed liquid B is added in mixture A and stirred, stirred evenly, pour out molding after be nano silicon dioxide again Growing concrete.
Preferably, the time stirred described in step S1 is 120~180 seconds.
Preferably, the time stirred described in step S3 is 120~180 seconds.
Compared with prior art, the invention has the advantages that:
1. compared to common regeneration concrete, the intensity of nano silicon dioxide regeneration concrete prepared by method of the invention It significantly improves, so as to be used widely in the changeable architectural engineering of environment, there are extensive market prospects.
2. the present invention according to recycled aggregate porosity it is high the characteristics of, on the basis of existing regeneration concrete manufacturing method, Improve the mechanical property of regeneration concrete and physical property using the nano silicon dioxide with high pozzolanic activity.Due to receiving The cost of rice silica is higher, by improving its preparation process, it is possible to reduce the reunion of nano silicon dioxide makes its exploitation value Value maximizes.
3. preparation method proposed by the present invention have it is easy to operate, highly practical, nano silicon dioxide is uniformly dispersed, coagulation The characteristics of native good fluidity.
Specific embodiment
The content further illustrated the present invention with reference to specific embodiment, but should not be construed as limiting the invention. Unless otherwise specified, the conventional means that technological means used in embodiment is well known to those skilled in the art.Except non-specifically Illustrate, reagent that the present invention uses, method and apparatus is the art conventional reagent, method and apparatus.
The cement that the present invention uses in embodiment is purchased for stone well board 42.5R portland cements from Guangzhou cement factory;Again Raw aggregate is the recycled aggregate of continuous grading, and grain size 1-10mm, the sand used is the common river sand of continuous grading, maximum particle diameter For 5mm;Nano silicon dioxide is hydrophilic, is purchased in Guangdong Gu De resins Co., Ltd, grain size is no more than 50nm, specific surface area For 200m2/g;Water-reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid, purchases the positive force perseverance new material Co., Ltd in Guangzhou.
Embodiment 1
1. it prepares:
(1) quality of each component is weighed up in proportion, and each component mass ratio is cement:Recycled aggregate:Fine aggregate:Water:Nanometer Silica:Water-reducing agent polycarboxylic acids=1:3.5:1.8:0.59:0.031:0.02, the water ash of nano silicon dioxide regeneration concrete Than 1:5.3.
(2) cement, recycled aggregate, fine aggregate in blender are stirred 120 seconds, is mixing uniformly to form mixture;
(3) after stirring water-reducing agent polycarboxylic acids and most water (60%-70%), then it is gradually added into nanometer Silica, while with glass bar craft high-speed stirred, stirred in plus nano silica, until nano silicon dioxide is complete Dispersion, obtains the mixed liquor of three;
(4) among the mixed liquor of step (3) being added to the mixture of step (2), at the same remaining water cleaning dress is mixed Blender is poured into together again after closing the container of liquid, is stirred 120 seconds in blender, is uniformly mixing to obtain regeneration concrete mix Object pours out molding to get nano silicon dioxide regeneration concrete.
2. performance test:After tested the slump of nano silicon dioxide regeneration concrete manufactured in the present embodiment be 28mm, 7 It intensity reaches 37.2Mpa, and the intensity of 28 days reaches 40.3Mpa, and workability is good.
Embodiment 2
1. it prepares:
(1) quality of each component is weighed up in proportion, and each component mass ratio is cement:Recycled aggregate:Fine aggregate:Water:Nanometer Silica:Water-reducing agent polycarboxylic acids=1:3.8:1.9:0.57:0.029:0.018, the water of nano silicon dioxide regeneration concrete Gray scale 1:5.7.
(2) cement, recycled aggregate, fine aggregate in blender are stirred 180 seconds, is mixing uniformly to form mixture;
(3) after stirring water-reducing agent polycarboxylic acids and most water (60%-70%), then it is gradually added into nanometer Silica, while with glass bar craft high-speed stirred, stirred in plus nano silica, until nano silicon dioxide is complete Dispersion, obtains the mixed liquor of three;
(4) among the mixed liquor of step (3) being added to the mixture of step (2), at the same remaining water cleaning dress is mixed Blender is poured into together again after closing the container of liquid, is stirred 180 seconds in blender, is uniformly mixing to obtain regeneration concrete mix Object pours out molding to get nano silicon dioxide regeneration concrete.
2. performance test:The slump of nano silicon dioxide regeneration concrete prepared by embodiment is 25mm after tested, 7 days Intensity reach 39.9Mpa, the intensity of 28 days reaches 43.2Mpa, and workability is good.
Embodiment 3
1. it prepares:
(1) quality of each component is weighed up in proportion, and each component mass ratio is cement:Recycled aggregate:Fine aggregate:Water:Nanometer Silica:Water-reducing agent polycarboxylic acids=1:3.4:2.0:0.6:0.025:0.015, the water ash of nano silicon dioxide regeneration concrete Than 1:5.4.
(2) cement, recycled aggregate, sand are placed in blender and stirred 180 seconds, be mixing uniformly to form mixture;
(3) after stirring water-reducing agent polycarboxylic acids and most water (60%-70%), then it is gradually added into nanometer Silica, while with glass bar craft high-speed stirred, stirred in plus nano silica, until nano silicon dioxide is complete Dispersion, obtains the mixed liquor of three;
(4) among the mixed liquor of step (3) being added to the mixture of step (2), at the same remaining water cleaning dress is mixed Blender is poured into together again after closing the container of liquid, is stirred 180 seconds in blender, is uniformly mixing to obtain regeneration concrete mix Object pours out molding to get nano silicon dioxide regeneration concrete.
2. performance test:After tested the slump of nano silicon dioxide regeneration concrete manufactured in the present embodiment be 35mm, 7 It intensity reaches 37.1Mpa, and the intensity of 28 days reaches 39.5Mpa, and workability is good.
Embodiment 4
A kind of nano silicon dioxide regeneration concrete is by raw material cement, recycled aggregate, fine aggregate, water, nanometer titanium dioxide Silicon and water-reducing agent are prepared, wherein cement:Recycled aggregate:Fine aggregate:Water:Nano silicon dioxide:The matter of water-reducing agent polycarboxylic acids Amount is than being 1:3.4:1.7:0.58:0.035:0.016, the ratio of mud of the nano silicon dioxide regeneration concrete is 1:5.2.
Embodiment 5
A kind of nano silicon dioxide regeneration concrete is by raw material cement, recycled aggregate, fine aggregate, water, nanometer titanium dioxide Silicon and water-reducing agent are prepared, the cement:Recycled aggregate:Fine aggregate:Water:Nano silicon dioxide:Water-reducing agent polycarboxylic acids Mass ratio is 1:3.8:2.1:0.63:0.025:0.02, the ratio of mud of the nano silicon dioxide regeneration concrete is 1:5.9.
Embodiment 6
A kind of nano silicon dioxide regeneration concrete is by raw material cement, recycled aggregate, fine aggregate, water, nanometer titanium dioxide Silicon and water-reducing agent are prepared, the cement:Recycled aggregate:Fine aggregate:Water:Nano silicon dioxide:Water-reducing agent polycarboxylic acids Mass ratio is 1:3.6:1.7:0.58:0.03:0.02, the ratio of mud of the nano silicon dioxide regeneration concrete is 1:5.1.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine and simplification, Equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (9)

1. a kind of nano silicon dioxide regeneration concrete, which is characterized in that the regeneration concrete is by raw material cement, Regenerated Bone Material, fine aggregate, water, nano silicon dioxide and water-reducing agent are prepared, the cement:Recycled aggregate:Fine aggregate:Water:Nanometer Silica:The mass ratio of water-reducing agent polycarboxylic acids is 1:(3.4~3.8):(1.7~2.1):(0.58~0.63):(0.025~ 0.035):(0.015~0.02), the ratio of mud of the nano silicon dioxide regeneration concrete is 1:5.1~5.9.
2. nano silicon dioxide regeneration concrete according to claim 1, which is characterized in that the cement is 42.5R silicon Acid salt cement.
3. nano silicon dioxide regeneration concrete according to claim 1, which is characterized in that the fine aggregate is continuous The common river sand of grading, the grain size of the fine aggregate is 1~5mm.
4. nano silicon dioxide regeneration concrete according to claim 1, which is characterized in that the recycled aggregate is connects The recycled aggregate of continuous grading, the grain size of the recycled aggregate is 1~10mm.
5. nano silicon dioxide regeneration concrete according to claim 1, which is characterized in that the nano silicon dioxide Grain size for 1~50nm, content >=99% of the nano silicon dioxide.
6. nano silicon dioxide regeneration concrete according to claim 1, which is characterized in that the water-reducing rate of the polycarboxylic acids It is 25~40%.
7. according to the preparation method of claim 1-6 any one of them nano silicon dioxide regeneration concretes, which is characterized in that It comprises the following specific steps that:
S1. cement, recycled aggregate and fine aggregate are mixing uniformly to form mixture A;
S2. after stirring polycarboxylic acids and water, nano silicon dioxide stirring is added, nano silicon dioxide is made to divide completely It dissipates, obtains mixed liquid B;
S3. mixed liquid B is added in mixture A and stirred, stirred evenly, as nano silicon dioxide regeneration is mixed after pouring out molding Solidifying soil.
8. the preparation method of nano silicon dioxide regeneration concrete according to claim 7, which is characterized in that in step S1 The time of the stirring is 120~180 seconds.
9. the preparation method of nano silicon dioxide regeneration concrete according to claim 7, which is characterized in that in step S3 The time of the stirring is 120~180 seconds.
CN201711238375.1A 2017-11-30 2017-11-30 A kind of nano silicon dioxide regeneration concrete and preparation method thereof Pending CN108164208A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108546028A (en) * 2018-07-20 2018-09-18 郑州大学 A kind of Nano-meter SiO_22With the preparation method of PVA fiber reinforcement geopolymer mortars
CN108892424A (en) * 2018-07-20 2018-11-27 郑州大学 A kind of Nano-meter SiO_22With PVA fiber reinforcement geopolymer mortar
CN109485341A (en) * 2018-12-05 2019-03-19 谢建林 A kind of preparation method regenerating thermal insulation concrete
TWI667083B (en) * 2018-07-11 2019-08-01 成亞資源科技股份有限公司 Waste copper dioxide regeneration method for waste packaging materials
CN110590288A (en) * 2019-10-14 2019-12-20 上海浦盈混凝土有限公司 High-strength concrete and preparation process thereof
CN111003999A (en) * 2019-12-30 2020-04-14 河海大学 Hybrid nano particle enhanced ecological pervious concrete and preparation method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI667083B (en) * 2018-07-11 2019-08-01 成亞資源科技股份有限公司 Waste copper dioxide regeneration method for waste packaging materials
CN108546028A (en) * 2018-07-20 2018-09-18 郑州大学 A kind of Nano-meter SiO_22With the preparation method of PVA fiber reinforcement geopolymer mortars
CN108892424A (en) * 2018-07-20 2018-11-27 郑州大学 A kind of Nano-meter SiO_22With PVA fiber reinforcement geopolymer mortar
CN109485341A (en) * 2018-12-05 2019-03-19 谢建林 A kind of preparation method regenerating thermal insulation concrete
CN110590288A (en) * 2019-10-14 2019-12-20 上海浦盈混凝土有限公司 High-strength concrete and preparation process thereof
CN111003999A (en) * 2019-12-30 2020-04-14 河海大学 Hybrid nano particle enhanced ecological pervious concrete and preparation method thereof

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Application publication date: 20180615