CN109053080A - Environmentally friendly high ductility cement-base composite material of one kind and preparation method thereof - Google Patents

Environmentally friendly high ductility cement-base composite material of one kind and preparation method thereof Download PDF

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Publication number
CN109053080A
CN109053080A CN201811065946.0A CN201811065946A CN109053080A CN 109053080 A CN109053080 A CN 109053080A CN 201811065946 A CN201811065946 A CN 201811065946A CN 109053080 A CN109053080 A CN 109053080A
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China
Prior art keywords
cement
base composite
water
environmentally friendly
ductility
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Pending
Application number
CN201811065946.0A
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Chinese (zh)
Inventor
高丹盈
吕铭艳
杨林
孟阳
汤寄予
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Zhengzhou University
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Zhengzhou University
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Priority to CN201811065946.0A priority Critical patent/CN109053080A/en
Publication of CN109053080A publication Critical patent/CN109053080A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • C04B28/06Aluminous 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 environmentally friendly high ductility cement-base composite materials and preparation method thereof, and it consists of the following components in terms of mass percentage: recycled fine aggregate 18%~26%, fiber 0.2%~9%, water 13%~26%, cement 32%~45%, admixture 12%~21%, water-reducing agent 0~2%, reinforcing agent 0~2%.Environmentally friendly high ductility cement-base composite material prepared by the present invention, compared with prior art, recycled fine aggregate broken using discarded concrete, after screening process substitutes natural siliceous sand, the high ductility cement-base composite material haveing excellent performance can not only be prepared, and building waste is consumed in large quantities, environmental pollution is reduced, is economized the land resource, while saving the non-renewable resources such as a large amount of sandstone.High ductility cement-base composite material prepared by the present invention can be widely used for the fields such as building, water conservancy and traffic, can not only be directly used as structural material, it can also be used to the maintenance and reinforcing of existing structure.

Description

Environmentally friendly high ductility cement-base composite material of one kind and preparation method thereof
Technical field
The present invention relates to a kind of environmentally friendly high ductility cement-base composite materials and preparation method thereof, belong to construction material Field.
Background technique
In building engineering field, environmentally friendly material, which refers to, will recycle benefit after industry or urban waste taking back and process With using no or little natural resources and the energy, realize the maximization of the utilization of resources and the minimum of environmental pollution.Natural sand stone bone The production of material need to excavate massif, can not be ignored to the destruction of environment, and the natural sand stone resource in China is close to withered at present It exhausts.At the same time, existing waste and old building of removing is needed in Urbanization Construction, produces a large amount of building waste, wherein discarding Concrete proportion is maximum, and about 41%.The most air storage of building waste at present not only occupies cultivated land, destroys soil, dirt Water body and air are contaminated, and influences city appearance, the serious development for restricting city.Thus, discarded concrete is crushed, is sieved Prepare high ductility cement-base composite material to substitute quartz sand after point equal processing, both can be reduced to the usage amount of natural sand stone with Yield solves the problems, such as that natural sand stone aggregate is increasingly exhausted, the dependence to natural resources is effectively reduced, and can reasonably disappear Existing building waste is consumed, is turned waste into wealth, mitigates building waste and is polluted caused by natural environment, product is played to sustainable development The facilitation of pole.
High ductility cement-base composite material has the characteristics of strain hardening, multiple crack growth, and the resistance to dynamic behavior of bending resistance tension is excellent It is different, it is provided simultaneously with stronger resistance to deformation and energy dissipation capability.In addition, high ductility cement-base composite material environment or environment with All had under load coupling excellent freezing and thawing performance, alkali resistant silicate reaction performance, low water and ion permeability energy, compared with Strong self-healing performance, improve concrete itself lack brittle break caused by ductility under extreme load and because of durability not The problem of being destroyed under normal load caused by foot.But raw material of the sand as high ductility cement-base composite material, while being also me The most widely used foundation engineering material of state's large-scale construction project, belongs to non-renewable resources, and inevitable in production process Bring environmental pollution in ground.Therefore, development resources saving, environmentally friendly high ductility cement-base composite material have great answer With value and social effect.
Currently, the application of recycled aggregate focuses primarily upon regenerated coarse aggregate, for substituting natural coarse aggregate (lime stone etc.) Concrete is prepared, but since regenerated coarse aggregate corner angle are excessive, spicule large percentage generates a large amount of inner transverse crackles when broken The problems such as, so that it compared with natural aggregate, crush index is big, porosity is big, apparent density is low, these defects result in regeneration Concrete strength is low, and durability is poor, limits the application field of regeneration concrete, so that the utilization rate of recycled aggregate is very low; Meanwhile producing the fine aggregate that coarse aggregate sieves and not being effectively utilized, still based on accumulation.The present invention is to regenerate Fine aggregate prepares high ductility cement-base composite material, turns waste into wealth as raw material, not only with good economic efficiency, and And huge social benefit can be brought.
Summary of the invention
The present invention prepares environmentally friendly high ductility cement-base composite material by raw material of recycled fine aggregate, a large amount of to consume Building waste discharges soil, turns waste into wealth, realize the sustainable development of building trade.
To achieve the above object, the technical solution adopted by the present invention are as follows:
Environmentally friendly high ductility cement-base composite material of one kind and preparation method thereof, according to mass percent, by following components Composition:
Recycled fine aggregate 18%~26%
Fiber 0.2%~9%
Admixture 12%~21%
Water 13%~26%
Cement 32%~45%
Water-reducing agent 0~2%
Reinforcing agent 0 ~ 2%.
The recycled fine aggregate, which refers to, to be obtained by building wastes such as discarded concretes through broken, screening, and maximum particle diameter does not surpass 1.18mm is crossed, and is configured according to theory of high packing.
The fiber refer to artificial synthetic fiber or glass fibre or one or both of natural fiber or steel fibre and It is two or more to be combined, and fibre length is not less than 6mm.
The admixture refer to flyash, slag, silicon ash, metakaolin etc. have pozzolanic activity mineral admixture and Industrial by-products can be one or more kinds of compound.
The cement is the cement of portland cement or aluminate cement or sulphate aluminium cement or other kinds.
The water-reducing agent be polycarboxylic acids or how be or it is other series have high water reducing rate water-reducing agent.
The reinforcing agent is the sulfate or carbonate of alkali or alkaline earth metal.
The environmentally friendly high ductility cement-base composite material, preparation method includes the following steps:
(1) cement, recycled fine aggregate, admixture are weighed according to each material quality percentage, and poured into blender, stirred at low speed 1~2 minute;
(2) water-reducing agent and water are weighed, and water-reducing agent is dissolved in the siccative being added in blender after water, stirs at low speed 2~3 points It is bell at even slurry;
(3) fiber is weighed, and fiber is sprinkled into slurry, is first stirred at low speed 1 minute, then high-speed stirred 30 seconds equal to fiber dispersion It is even;
(4) related die is processed in design as needed, and is assembled complete;The slurry being stirred is poured into mold, vibratory compaction, in advance Demoulding after supporting 24 hours continues maintenance to 28 days, obtains environmentally friendly high ductility cement-base composite material.
Compared with prior art, the present invention having the advantage that
(1) recycled fine aggregate broken using discarded concrete, after screening process substitutes quartz sand and prepares Gao Yan as raw material Property cement-base composite material, largely consume building waste, mitigate environmental pollution, discharge soil.
(2) turn waste into wealth, resource reutilization can not only save a large amount of natural resources, and the height haveing excellent performance is made Ductility cement-base composite material, with good economic efficiency and social benefit.
Specific embodiment
Example given below but is not to be construed as to the scope of the present invention to further explanation of the invention Limitation, some nonessential improvement and tune that person skilled in art makes the present invention according to the content of aforementioned present invention It is whole, still fall within protection scope of the present invention.
Example 1:
Raw material ratio is as follows:
Recycled fine aggregate 23.8%
Vinal 0.98%
Flyash 17.85%
Water 14.58%
Cement 41.26%
High efficiency water reducing agent 0.83%
Reinforcing agent 0.5%.
Wherein, recycled fine aggregate is obtained by discarded concrete crushing and screening, and maximum particle diameter is no more than 1.18mm, according to close The theoretical configuration of accumulation;40 microns of vinal Average equivalent diameter, average length 12mm, tensile strength is greater than 1500MPa;Admixture is flyash;Cement is 42.5 portland cements;High efficiency water reducing agent is polycarboxylate water-reducer;Reinforcing agent is Sodium sulphate.The high ductility cement-base composite material being prepared according to previous process, the performance after standard curing 28d are as follows: Flexural strength 22.23MPa, compression strength 77.33MPa.
Example 2:
Raw material ratio is as follows:
Recycled fine aggregate 22.56%
Vinal 1.1%
Silicon ash 16.92%
Water 19.74%
Cement 39.48%
High efficiency water reducing agent 0.2%
Reinforcing agent 0%.
Wherein, recycled fine aggregate is obtained by discarded concrete crushing and screening, and maximum particle diameter is no more than 1.18mm, according to close The theoretical configuration of accumulation;40 microns of vinal Average equivalent diameter, average length 12mm, tensile strength is greater than 1500MPa;Admixture is silicon ash;Cement is 42.5 portland cements;High efficiency water reducing agent is polycarboxylate water-reducer.According to aforementioned work The high ductility cement-base composite material that skill is prepared, the performance after standard curing 28d are as follows: flexural strength 18.01MPa, Compression strength 55.2MPa.
Example 3:
Raw material ratio is as follows:
Recycled fine aggregate 21.14%
Polypropylene fibre 0.82%
Flyash 16.08%
Water 24.13%
Cement 37.27%
High efficiency water reducing agent 0
Reinforcing agent 0.6%.
Wherein, recycled fine aggregate is obtained by discarded concrete crushing and screening, and maximum particle diameter is no more than 1.18mm, according to close The theoretical configuration of accumulation;Polypropylene fibre is 45 microns of Average equivalent diameter, average length 19mm, and tensile strength is greater than 458MPa's Pencil monofilament;Admixture is flyash;Cement is 42.5 portland cements;High efficiency water reducing agent is polycarboxylate water-reducer;Reinforcing agent For sodium sulphate.The high ductility cement-base composite material being prepared according to previous process, the performance after standard curing 28d is such as Under: flexural strength 8.9MPa, compression strength 39.4MPa.
Example 4:
Raw material ratio is as follows:
Recycled fine aggregate 22.19%
Vinal 1.47%
Flyash 26.8%
Water 21.75%
Cement 27.2%
High efficiency water reducing agent 0.19%
Reinforcing agent 0.4%.
Wherein, recycled fine aggregate is obtained by discarded concrete crushing and screening, and maximum particle diameter is no more than 1.18mm, according to close The theoretical configuration of accumulation;40 microns of vinal Average equivalent diameter, average length 12mm, tensile strength is greater than 1500MPa;Admixture is flyash;Cement is 42.5 portland cements;High efficiency water reducing agent is polycarboxylate water-reducer;Reinforcing agent is Sodium carbonate.The high ductility cement-base composite material being prepared according to previous process, the performance after standard curing 28d are as follows: Flexural strength 14.3MPa, compression strength 46.2MPa.
Example 5:
Raw material ratio is as follows:
Recycled fine aggregate 22.45%
Polypropylene fibre 1.2%
Slag 17.58%
Water 17.57%
Cement 40.99%
High efficiency water reducing agent 0.21%
Reinforcing agent 2%.
Wherein, recycled fine aggregate is obtained by discarded concrete crushing and screening, and maximum particle diameter is no more than 1.18mm, according to close The theoretical configuration of accumulation;40 microns of vinal Average equivalent diameter, average length 12mm, tensile strength is greater than 1500MPa;Admixture is slag;Cement is 42.5 portland cements;High efficiency water reducing agent is polycarboxylate water-reducer;Reinforcing agent is sulphur Sour calcium.The high ductility cement-base composite material being prepared according to previous process, the performance after standard curing 28d are as follows: anti- Roll over intensity 20.61MPa, compression strength 69.83MPa.
Example 6:
Raw material ratio is as follows:
Recycled fine aggregate 22.45%
Steel fibre 5.2%
Slag 17.58%
Water 17.57%
Cement 40.99%
High efficiency water reducing agent 0.21%
Reinforcing agent 2%.
Wherein, recycled fine aggregate is obtained by discarded concrete crushing and screening, and maximum particle diameter is no more than 1.18mm, according to close The theoretical configuration of accumulation;Steel fibre diameter 0.2mm, length 13mm;Admixture is slag;Cement is 42.5 portland cements;It is high Effect water-reducing agent is polycarboxylate water-reducer;Reinforcing agent is calcium sulfate.The high ductility cement base being prepared according to previous process is compound Material, the performance after standard curing 28d are as follows: flexural strength 24MPa, compression strength 72.3MPa.

Claims (8)

1. a kind of environmentally friendly high ductility cement-base composite material, it is characterised in that: according to mass percent, by following components Composition:
Recycled fine aggregate 18%~26%
Fiber 0.2%~9%
Admixture 12%~21%
Water 13%~26%
Cement 32%~45%
Water-reducing agent 0~2%
Reinforcing agent 0~2%.
2. the environmentally friendly high ductility cement-base composite material of one kind according to claim 1, it is characterised in that: it is described again Raw fine aggregate, which refers to, to be obtained by building wastes such as discarded concretes through broken, screening, and maximum particle diameter is no more than 1.18mm, and according to Theory of high packing configuration.
3. the environmentally friendly high ductility cement-base composite material of one kind according to claim 1, it is characterised in that: the fibre Dimension refers to artificial synthetic fiber or glass fibre or one or both of natural fiber or steel fibre and two or more compound, and Fibre length is not less than 6mm.
4. the environmentally friendly high ductility cement-base composite material of one kind according to claim 1, it is characterised in that: described to mix It closes material and refers to that flyash, slag, silicon ash, metakaolin etc. have the mineral admixture and industrial by-products of pozzolanic activity, it can To be one or more kinds of compound.
5. the environmentally friendly high ductility cement-base composite material of one kind according to claim 1, it is characterised in that: the water Mud is the cement of portland cement or aluminate cement or sulphate aluminium cement or other kinds.
6. the environmentally friendly high ductility cement-base composite material of one kind according to claim 1, it is characterised in that: described to subtract Aqua be polycarboxylic acids or how be or it is other series have high water reducing rate water-reducing agent.
7. the environmentally friendly high ductility cement-base composite material of one kind according to claim 1, it is characterised in that: the increasing Strong agent is the sulfate or carbonate of alkali or alkaline earth metal.
8. the environmentally friendly high ductility cement-base composite material of one kind according to claim 1, it is characterised in that: preparation side Method the following steps are included:
(1) cement, recycled fine aggregate, admixture are weighed according to each material quality percentage, and poured into blender, stirred at low speed 1~2 minute;
(2) water-reducing agent, reinforcing agent and water are weighed, and water-reducing agent, reinforcing agent are dissolved in the siccative being added in blender after water, Stir at low speed 2~3 minutes formation even slurries;
(3) fiber is weighed, and fiber is sprinkled into slurry, is first stirred at low speed 1 minute, then high-speed stirred 30 seconds or more, until fine Dimension is uniformly dispersed;
(4) related die is processed in design as needed, and is assembled complete;The slurry being stirred is poured into mold, vibratory compaction, in advance Demoulding after supporting 24 hours continues maintenance to 28 days, obtains environmentally friendly high ductility cement-base composite material.
CN201811065946.0A 2018-09-13 2018-09-13 Environmentally friendly high ductility cement-base composite material of one kind and preparation method thereof Pending CN109053080A (en)

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN110357541A (en) * 2019-08-12 2019-10-22 广东新瑞龙生态建材有限公司 A kind of recycled fine aggregate concrete and preparation method thereof
CN110498647A (en) * 2019-07-23 2019-11-26 东北电力大学 A kind of fiber reinforcement type recycled fine aggregate cement-base composite material
CN111018437A (en) * 2019-12-10 2020-04-17 郑州大学 Ultrahigh-toughness waste brick-concrete regeneration mixture and preparation method and application thereof
CN112939537A (en) * 2021-03-12 2021-06-11 湖北工业大学 Recycled concrete containing composite fibers and preparation method thereof
CN113004009A (en) * 2021-04-24 2021-06-22 上海石化安东混凝土有限公司 Environment-friendly high-strength concrete and preparation method thereof
CN113999582A (en) * 2021-11-26 2022-02-01 甘肃中研同创材料科技有限责任公司 Water-based building garbage waterproof coating and preparation method thereof
CN114133799A (en) * 2021-11-26 2022-03-04 甘肃中研同创材料科技有限责任公司 Building waste anticorrosive paint and preparation method thereof

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CN106380147A (en) * 2016-09-29 2017-02-08 万玉君 High-temperature-resistant high-ductility fiber-reinforced cement-base composite material and preparation method thereof
CN107235684A (en) * 2017-06-21 2017-10-10 福州大学 A kind of recycled fine aggregate ultra-high performance concrete and its application method
CN107954656A (en) * 2017-11-01 2018-04-24 同济大学 A kind of regenerative micro powder concrete with superelevation ductility and preparation method thereof
CN108285310A (en) * 2018-03-08 2018-07-17 东南大学 A kind of ultra-high performance concrete and preparation method thereof prepared using discarded concrete recycled fine aggregate

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Publication number Priority date Publication date Assignee Title
CN104211358A (en) * 2014-09-11 2014-12-17 中国中材国际工程股份有限公司 Rapid-hardening early strength high-ductility cement-based composite material and preparation method thereof
CN106380147A (en) * 2016-09-29 2017-02-08 万玉君 High-temperature-resistant high-ductility fiber-reinforced cement-base composite material and preparation method thereof
CN107235684A (en) * 2017-06-21 2017-10-10 福州大学 A kind of recycled fine aggregate ultra-high performance concrete and its application method
CN107954656A (en) * 2017-11-01 2018-04-24 同济大学 A kind of regenerative micro powder concrete with superelevation ductility and preparation method thereof
CN108285310A (en) * 2018-03-08 2018-07-17 东南大学 A kind of ultra-high performance concrete and preparation method thereof prepared using discarded concrete recycled fine aggregate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110498647A (en) * 2019-07-23 2019-11-26 东北电力大学 A kind of fiber reinforcement type recycled fine aggregate cement-base composite material
CN110498647B (en) * 2019-07-23 2021-10-08 东北电力大学 Fiber-reinforced recycled fine aggregate cement-based composite material
CN110357541A (en) * 2019-08-12 2019-10-22 广东新瑞龙生态建材有限公司 A kind of recycled fine aggregate concrete and preparation method thereof
CN111018437A (en) * 2019-12-10 2020-04-17 郑州大学 Ultrahigh-toughness waste brick-concrete regeneration mixture and preparation method and application thereof
CN112939537A (en) * 2021-03-12 2021-06-11 湖北工业大学 Recycled concrete containing composite fibers and preparation method thereof
CN113004009A (en) * 2021-04-24 2021-06-22 上海石化安东混凝土有限公司 Environment-friendly high-strength concrete and preparation method thereof
CN113999582A (en) * 2021-11-26 2022-02-01 甘肃中研同创材料科技有限责任公司 Water-based building garbage waterproof coating and preparation method thereof
CN114133799A (en) * 2021-11-26 2022-03-04 甘肃中研同创材料科技有限责任公司 Building waste anticorrosive paint and preparation method thereof

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Application publication date: 20181221