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 PDFInfo
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- 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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- Prior art keywords
- cement
- base composite
- composite material
- high ductility
- water
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions 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
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions 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
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, 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
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.
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Cited By (11)
| 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 |
| CN114032724A (en) * | 2021-09-18 | 2022-02-11 | 同济大学 | Assembled recycled concrete rural pavement |
| 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 |
| CN115124288A (en) * | 2022-07-13 | 2022-09-30 | 新余学院 | High-strength recycled concrete and preparation method thereof |
| CN116535158A (en) * | 2023-04-11 | 2023-08-04 | 武汉大学 | Corrosion-resistant high-limestone-doped high-ductility cement-based composite material and preparation method thereof |
| CN117342833A (en) * | 2023-12-05 | 2024-01-05 | 石家庄铁道大学 | Ultra-high ductility geopolymer recycled concrete and preparation method thereof |
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| 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 |
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Cited By (13)
| 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 |
| CN114032724A (en) * | 2021-09-18 | 2022-02-11 | 同济大学 | Assembled recycled concrete rural pavement |
| 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 |
| CN115124288A (en) * | 2022-07-13 | 2022-09-30 | 新余学院 | High-strength recycled concrete and preparation method thereof |
| CN116535158A (en) * | 2023-04-11 | 2023-08-04 | 武汉大学 | Corrosion-resistant high-limestone-doped high-ductility cement-based composite material and preparation method thereof |
| CN117342833A (en) * | 2023-12-05 | 2024-01-05 | 石家庄铁道大学 | Ultra-high ductility geopolymer recycled concrete and preparation method thereof |
| CN117342833B (en) * | 2023-12-05 | 2024-01-30 | 石家庄铁道大学 | Ultra-high ductility geopolymer recycled concrete and preparation method thereof |
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Application publication date: 20181221 |
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| RJ01 | Rejection of invention patent application after publication |