CN105481308A - Hybrid fiber regenerated concrete, and preparation thereof - Google Patents
Hybrid fiber regenerated concrete, and preparation thereof Download PDFInfo
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- CN105481308A CN105481308A CN201510907299.3A CN201510907299A CN105481308A CN 105481308 A CN105481308 A CN 105481308A CN 201510907299 A CN201510907299 A CN 201510907299A CN 105481308 A CN105481308 A CN 105481308A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to a hybrid fiber regenerated concrete, and preparation thereof. Each cubic meter of the hybrid fiber regenerated concrete comprises 0.5kg of alkali-resistant glass fiber, 0.5kg of polypropylene fiber, 400kg of cement, 100kg of flyash, 175kg of water, 1000kg of recycled coarse aggregate, and 750kg of sand. According to the invention, waste cement is taken as an ecological construction material, and enhanced hybrid fiber is added so as to prepare an enhanced ecological wall material with relatively high toughness and ductility, and building waste treatment problems and novel building material requirement problems can be solved.
Description
Technical field
The invention belongs to building material technical field, relate to novel assembled ecological composite Mixed Architecture on the middle and senior level, also can be used in the structural system of common building, particularly a kind of assorted fibre regeneration concrete and preparation thereof.
Background technology
Dwelling construction is as the conventional industries of China, be in the extensive production phase for a long time, the energy and raw materials consumption excessive, industrialization degree is not high, labour productivity and with low content of technology, structure formation is single, construction quality and function poor, particularly the seismic seeurity of housing structure and comfortableness in urgent need to be improved.Original ecological composite structure and the vertical confining part of concrete organically combine by seminar, mutually learn from other's strong points to offset one's weaknesses, respectively draw advantage, propose assembled ecological composite Mixed Architecture on the middle and senior level.At present, China's body of wall major part adopts or traditional material, finding novel material of construction has become the problem that seminar needs solution at present badly.
Recycled concrete not only solves part environmental issue, and has maximally utilised resource, meets the strategy of Sustainable Construction Industry, is one of concrete important measures of development green ecological.Because regenerated coarse aggregate surface irregularity, corner angle are many, and surface is wrapped in the large and sand-cement slurry that water-intake rate is high in a considerable amount of space, add the damage accumulation of concrete blocks in disintegration, shattering process, there is a large amount of microfracture in its inside, cause the Workability of Regenerated Concrete of mixing to be deteriorated, limit its range of application.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, play the advantage of assorted fibre regeneration concrete, the object of the present invention is to provide a kind of assorted fibre regeneration concrete and preparation thereof, discarded concrete is utilized to do ecological architectural material, add enhancing assorted fibre wherein, make the enhancing ecological wall material with higher toughness, better ductility, both can solve the process problem of building waste, the needs of problems of New Building Materials can be solved again.
To achieve these goals, the technical solution used in the present invention is:
A kind of assorted fibre regeneration concrete, contains in every cubic meter of concrete: alkali resistant glass fibre 0.5kg, polypropylene fibre 0.5kg, cement 400kg, flyash 100kg, water 175kg, regenerated coarse aggregate 1000kg and sand 750kg.
Wherein the amount of alkali resistant glass fibre can be 0.3kg, and polypropylene fibre 0.7kg, or alkali resistant glass fibre 0.7kg, polypropylene fibre 0.3kg, be substituted in such scheme.
Described cement is normal silicate complex cement, and label is 32.5, and configuration intensity is C30.
Described regenerated coarse aggregate is sieved by the discarded concrete taking from construction site and obtains, its particle diameter 10 ~ 20mm.
Present invention also offers the preparation method of described assorted fibre regeneration concrete, comprise the steps:
The first step, prepares regenerated coarse aggregate;
Second step, the regeneration aggregate that saturation plane is done and required cement, flyash mix and blend 1min, then add required water 50% stirs 1min again;
3rd step, puts into remaining required water and fully stirs, making them be dispersed in water, then add in the stirring thing of second step gained together with sand, stir 2min by polypropylene fibre and alkali resistant glass fibre;
4th step, vibrates after the final gained stirring thing of the 3rd step is put into die for molding;
5th step, the product after the 4th step being vibrated is put into standard curing room and is carried out maintenance.
The preparation method of described regenerated coarse aggregate is:
To take from discarded concrete advanced pedestrian's work primary crushing in construction site, the regeneration aggregate after primary crushing carries out secondary breaking with crusher again, is sieved by the aggregate pulp classifier after secondary breaking, gets the aggregate that particle diameter is 10 ~ 20mm.
In preparation technology of the present invention, in order to make polypropylene fibre and alkali resistant glass fibre can be evenly distributed in concrete, have employed Secondary mixing.Polypropylene fibre and alkali resistant glass fibre are placed in and drop into stirring thing after water stirs and mix and stir, make two kinds of fibers be dispersed in regeneration concrete, unlikely unity.Mixing assorted fibre regeneration concrete must not adopt seawater, extra large sand, forbids disastrously to add villaumite.Except afore mentioned rules, assorted fibre regeneration concrete other materials used, should meet regulation raw materials used about Steel Concrete in current specifications.
Compared with prior art, the shortcomings such as the present invention, from the angle of Eco, can overcome Traditional Ecological materials for wall ductility poor, easy to crack, its good toughness, ductility and resistance to cleavage can meet the demand of seminar to New Building Materials well.Not only solving part environmental issue, and maximally utilised resource, meet the strategy of Sustainable Construction Industry, is one of concrete important measures of development green ecological.
Accompanying drawing explanation
Fig. 1 is assorted fibre regeneration concrete cubic compressive strength of the present invention test damage-form schematic diagram, and in figure, lines represents crack.
Fig. 2 is assorted fibre regeneration concrete cubes tensile splitting strength of the present invention test damage-form schematic diagram, and in figure, lines represents crack.
Fig. 3 is assorted fibre regeneration concrete cubic compressive strength of the present invention test test block crack partial schematic diagram, and in figure, fine rule represents fiber.
Fig. 4 is normal concrete cubic compressive strength test damage-form schematic diagram, and in figure, lines represents crack.In figure, dotted portion represents and comes off.
Fig. 5 is normal concrete cubes tensile splitting strength test damage-form schematic diagram, and in figure, lines represents crack.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.
Embodiment 1
A kind of assorted fibre regeneration concrete, contains in every cubic meter of concrete: alkali resistant glass fibre 0.5kg, polypropylene fibre 0.5kg, cement 400kg, flyash 100kg, water 175kg, regenerated coarse aggregate 1000kg and sand 750kg.
Cement is normal silicate complex cement, and label is 32.5, and configuration intensity is C30.
Regenerated coarse aggregate is sieved by the discarded concrete taking from construction site and obtains, its particle diameter 10 ~ 20mm.
The preparation method of this assorted fibre regeneration concrete, comprises the steps:
The first step, prepares regenerated coarse aggregate;
Second step, the regeneration aggregate that saturation plane is done and required cement, flyash mix and blend 1min, then add required water 50% stirs 1min again;
3rd step, puts into remaining required water and fully stirs, making them be dispersed in water, then add in the stirring thing of second step gained together with sand, stir 2min by polypropylene fibre and alkali resistant glass fibre;
4th step, vibrates after the final gained stirring thing of the 3rd step is put into die for molding;
5th step, the product after the 4th step being vibrated is put into standard curing room and is carried out maintenance.
Wherein, the preparation method of regenerated coarse aggregate is:
To take from discarded concrete advanced pedestrian's work primary crushing in construction site, the regeneration aggregate after primary crushing carries out secondary breaking with crusher again, is sieved by the aggregate pulp classifier after secondary breaking, gets the aggregate that particle diameter is 10 ~ 20mm.
In preparation technology of the present invention, in order to make polypropylene fibre and alkali resistant glass fibre can be evenly distributed in concrete, have employed Secondary mixing.Polypropylene fibre and alkali resistant glass fibre are placed in and drop into stirring thing after water stirs and mix and stir, make two kinds of fibers be dispersed in regeneration concrete, unlikely unity.Mixing assorted fibre regeneration concrete must not adopt seawater, extra large sand, forbids disastrously to add villaumite.Except afore mentioned rules, assorted fibre regeneration concrete other materials used, should meet regulation raw materials used about Steel Concrete in current specifications.
Embodiment 2
The amount of alkali resistant glass fibre is 0.3kg, and polypropylene fibre 0.7kg, all the other amounts of components are consistent with embodiment 1.
Embodiment 3
The amount of alkali resistant glass fibre is 0.7kg, and polypropylene fibre 0.3kg, all the other amounts of components are consistent with embodiment 1.
The present invention mixes a certain amount of assorted fibre (alkali resistant glass fibre and polypropylene fibre) by a certain percentage in regeneration concrete.In hybrid fiber concrete: on the one hand, the glass fibre that Young's modulus is high plays strongthener, when the lower generation expansion of the effect of carrying outside of the fine crack in concrete, fibres span plays bridge joint effect between the cracks, alleviate the stress concentration of crack tip, add the expansion resistance in crack, improve concrete resistance to cleavage; On the other hand, the low but tension set of modular ratio concrete is wanted much bigger polypropylene fibre to significantly improve concretely to split after strain ability, form multiple location, multiple spot cracking.
Experimental result sees figures.1.and.2, concrete cubic compressive strength experimental basis GB/T50081-2002 " normal concrete mechanical property tests method standard " carries out, sample dimensions used is 150mm × 150mm × 150mm, three pieces one group, " 5000KN microcomputer controlled electro-hydraulic servo pressure experiment machine " is used to measure.Concrete cubic compressive strength experimental basis GB/T50081-2002 " normal concrete mechanical property tests method standard " carries out, sample dimensions used is 150mm × 150mm × 300mm, three pieces one group, " 300KN electronic universal tester DNS300 " is used to measure.
Fig. 1 is the damage-form schematic diagram of one piece of representative assorted fibre regeneration concrete cubic compressive strength test, can select embodiment 1 product.There is following characteristics in the damage-form of test specimen: in compressive strength of concrete process of the test, and the crack originally occurred, near the top layer, side of test block, is the longitudinal slit parallel with loading direction.Along with the increase of load, test specimen progressively develops into inclined crack by pressure-break.Along with the continuation of load increases, inclined crack is constantly to two ends expansion, and the final pyramidal plane that formed destroys.
Fig. 2 is the damage-form schematic diagram of one piece of representative assorted fibre regeneration concrete cubes tensile splitting strength test, can select embodiment 1 product.There is following characteristics in the damage-form of test specimen: at the loading initial stage, and regeneration concrete surface finds no crack and occurs.Along with the increase of load, the stress in regeneration concrete constantly increases, and its face center starts to occur crack.Along with the continuation of load increases, crack is developed gradually near filler strip, and fracture width increases gradually, finally regenerates on coagulation and is split.
Test-results shows, two kinds of fiber blendings are than the good toughness not mixing or singly mix fibrous concrete, thus improve the disadvantageous effect that regenerated coarse aggregate self-defect brings to concrete, to reaching the object improving regeneration concrete ductility and improve the performances such as cracking resistance, provide theoretical foundation for engineering is actual.
By this cube specimen rupture test, analyze its test situation and can compare with normal concrete or singly mix fibrous concrete, resistance to compression and the cleavage strength damage-form of regeneration hybrid fiber concrete have larger difference:
(1) during the ultimate compression strength of assorted fibre regeneration concrete is tested, assorted fibre regeneration concrete test specimen, stress destruction ftractures, but do not occur peeling off broken phenomenon, as seen from Figure 3, because there is certain interception in blending fibre transections crack, fiber assume responsibility for stress, and respectively comparatively even to dispersion.Normal concrete test specimen, stress destruction ftractures, and occurs peeling off broken phenomenon.
(2) the Split-tension of Rolled damage-form of assorted fibre regeneration concrete.Initial from loading, hold to last test specimen and can't stand load, stitch wide increase and be split.The regeneration concrete that its time length of destroying does not add fiber or singly mixes fiber will be grown, and has obvious and complete splitting surface.
(3) assorted fibre regeneration concrete cubes destructive process is found out, the effect of blending fiber makes to be destroyed immediately, and blending fiber serves the effect that toughness reinforcing resistance is split really.Compare from intensity, the great function that assorted fibre regeneration concrete plays in the base because of blending fiber, can absorb very large failure energy, the regeneration concrete causing strength ratio general wants high.
Claims (6)
1. an assorted fibre regeneration concrete, is characterized in that, contains in every cubic meter of concrete: alkali resistant glass fibre 0.5kg, polypropylene fibre 0.5kg, cement 400kg, flyash 100kg, water 175kg, regenerated coarse aggregate 1000kg and sand 750kg.
2. assorted fibre regeneration concrete according to claim 1, it is characterized in that, described cement is normal silicate complex cement, and label is 32.5, and configuration intensity is C30.
3. assorted fibre regeneration concrete according to claim 1, is characterized in that, described regenerated coarse aggregate is sieved by the discarded concrete taking from construction site and obtains, its particle diameter 10 ~ 20mm.
4. the preparation method of assorted fibre regeneration concrete described in claim 1, is characterized in that, comprise the steps:
The first step, prepares regenerated coarse aggregate;
Second step, the regeneration aggregate that saturation plane is done and required cement, flyash mix and blend 1min, then add required water 50% stirs 1min again;
3rd step, puts into remaining required water and fully stirs, making them be dispersed in water, then add in the stirring thing of second step gained together with sand, stir 2min by polypropylene fibre and alkali resistant glass fibre;
4th step, vibrates after the final gained stirring thing of the 3rd step is put into die for molding;
5th step, the product after the 4th step being vibrated is put into standard curing room and is carried out maintenance.
5. assorted fibre regeneration concrete according to claim 4, it is characterized in that, the preparation method of described regenerated coarse aggregate is:
To take from discarded concrete advanced pedestrian's work primary crushing in construction site, the regeneration aggregate after primary crushing carries out secondary breaking with crusher again, is sieved by the aggregate pulp classifier after secondary breaking.
6. assorted fibre regeneration concrete according to claim 4, it is characterized in that, the particle diameter of described regenerated coarse aggregate is 10 ~ 20mm.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106630839A (en) * | 2016-12-22 | 2017-05-10 | 东南大学 | Recycled aggregate for differentiating new and old mortar in carbonized concrete and preparation method thereof |
| CN106759874A (en) * | 2016-11-23 | 2017-05-31 | 成都大学 | A kind of environment-friendly type concrete structure |
| CN108069669A (en) * | 2018-01-11 | 2018-05-25 | 中国建材检验认证集团北京天誉有限公司 | A kind of glass fiber reinforced cement material being prepared using waste concrete |
| CN108164230A (en) * | 2018-01-11 | 2018-06-15 | 中国建材检验认证集团北京天誉有限公司 | A kind of glass fiber reinforced cement material being prepared using solid waste mixture |
| CN108387613A (en) * | 2017-12-29 | 2018-08-10 | 石家庄铁道大学 | A kind of recycled aggregate is to concrete interface transition region influence degree detection method |
| CN109650794A (en) * | 2018-12-29 | 2019-04-19 | 上海练定混凝土制品有限公司 | A kind of low slump loss concrete and preparation method thereof |
| CN110194627A (en) * | 2019-06-25 | 2019-09-03 | 安徽广宏园林建设有限公司 | A kind of regeneration concrete and preparation method thereof |
| CN111470829A (en) * | 2020-03-19 | 2020-07-31 | 南京鹿晶混凝土有限公司 | High-strength concrete and production process thereof |
| CN113277803A (en) * | 2021-03-10 | 2021-08-20 | 同济大学 | Fiber seawater sea sand recycled concrete and preparation method thereof |
| CN113336507A (en) * | 2021-07-14 | 2021-09-03 | 中铁建工集团有限公司 | Regenerated fiber concrete |
| CN113443874A (en) * | 2021-06-28 | 2021-09-28 | 武汉工程大学 | Nano calcium carbonate and polypropylene fiber synergistically enhanced recycled concrete and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759874A (en) * | 2016-11-23 | 2017-05-31 | 成都大学 | A kind of environment-friendly type concrete structure |
| CN106630839B (en) * | 2016-12-22 | 2019-04-30 | 东南大学 | For distinguishing the recycled aggregate and preparation method thereof of new old mortar in carbonated concrete |
| CN106630839A (en) * | 2016-12-22 | 2017-05-10 | 东南大学 | Recycled aggregate for differentiating new and old mortar in carbonized concrete and preparation method thereof |
| CN108387613B (en) * | 2017-12-29 | 2020-04-03 | 石家庄铁道大学 | Method for detecting influence degree of recycled aggregate on concrete interface transition region |
| CN108387613A (en) * | 2017-12-29 | 2018-08-10 | 石家庄铁道大学 | A kind of recycled aggregate is to concrete interface transition region influence degree detection method |
| CN108164230A (en) * | 2018-01-11 | 2018-06-15 | 中国建材检验认证集团北京天誉有限公司 | A kind of glass fiber reinforced cement material being prepared using solid waste mixture |
| CN108069669A (en) * | 2018-01-11 | 2018-05-25 | 中国建材检验认证集团北京天誉有限公司 | A kind of glass fiber reinforced cement material being prepared using waste concrete |
| CN109650794A (en) * | 2018-12-29 | 2019-04-19 | 上海练定混凝土制品有限公司 | A kind of low slump loss concrete and preparation method thereof |
| CN110194627A (en) * | 2019-06-25 | 2019-09-03 | 安徽广宏园林建设有限公司 | A kind of regeneration concrete and preparation method thereof |
| CN111470829A (en) * | 2020-03-19 | 2020-07-31 | 南京鹿晶混凝土有限公司 | High-strength concrete and production process thereof |
| CN113277803A (en) * | 2021-03-10 | 2021-08-20 | 同济大学 | Fiber seawater sea sand recycled concrete and preparation method thereof |
| CN113443874A (en) * | 2021-06-28 | 2021-09-28 | 武汉工程大学 | Nano calcium carbonate and polypropylene fiber synergistically enhanced recycled concrete and preparation method thereof |
| CN113336507A (en) * | 2021-07-14 | 2021-09-03 | 中铁建工集团有限公司 | Regenerated fiber concrete |
| CN113336507B (en) * | 2021-07-14 | 2022-08-30 | 中铁建工集团有限公司 | Regenerated fiber concrete |
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