CN104529335B - Discarded fired brick regeneration C35 steel fiber reinforced concrete and preparation method thereof - Google Patents
Discarded fired brick regeneration C35 steel fiber reinforced concrete and preparation method thereof Download PDFInfo
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- CN104529335B CN104529335B CN201410799864.4A CN201410799864A CN104529335B CN 104529335 B CN104529335 B CN 104529335B CN 201410799864 A CN201410799864 A CN 201410799864A CN 104529335 B CN104529335 B CN 104529335B
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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 present invention relates to a kind of discarded fired brick regeneration C35 steel fiber reinforced concrete and preparation method thereof, formulated by cement, steel fibre, discarded fired brick regenerated coarse aggregate, fine aggregate, water and water reducer 1:0.096 ~ 0.160:1.679 in mass ratio ~ 1.737:0.653 ~ 0.817:0.367～0.397:0.006 ~ 0.01.Gained steel fiber reinforced concrete workability of the present invention, mobility, water-retaining property are functional, and its preparation process is simple and environmentally-friendly, it is easier to construction.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of discarded fired brick regeneration C35 steel fiber reinforced concrete
And preparation method thereof.
Background technology
Along with constantly the accelerating of Urbanization in China, the deepening continuously and the paving in succession of old city transformation of new countryside construction
Opening, is removed in substantial amounts of house, town and country, and the brickbat watt garbage of generation unprecedentedly increases, China existing about 400 × 109m3Building,
Future will progressively be converted into building solid castoff in 100 years；In 50 years of past, China at least produces 200 × 109m3Viscous
Cob brick goods；In future 50 years, these clay brick goods also translate into building solid castoff.At present, China's building is useless
Gurry is stacked total amount and has been reached 70 × 109T, the building solid castoff of year demolition of buildings generation is 2 × 109More than t, the most absolutely
Major part, without any process, is just transported to countryside air storage or landfill, need to consume substantial amounts of cultivated land resource, is clearing simultaneously
With being scattered and the problem such as airborne dust in stacking process, serious environmental problem and social effects of pollution are caused.Therefore, discarded fired brick
Recycling become problem demanding prompt solution.
The correlational study achievement preparing concrete with useless fired brick is the abundantest, and major defect is following side
Face: (1) useless fired brick aggregate is relatively low due to density, easily occurs rising phenomenon during vibrating, and aggregate distribution is uniform not, leads
Causing concrete batching intensity relatively low, concrete strength elemental range is: C10 level ~ C20 level；(2) coarse aggregate Replacement rate is relative
Relatively low.Owing to useless brick aggregate intensity is low relative to natural aggregate, therefore, the height of Replacement rate directly affects the pressure resistance of concrete
Degree.In order to improve the rank of concrete, Replacement rate can only be reduced, have impact on the recycling of discarded fired brick；(3) with useless brick
Regenerated aggregate concrete prepared by aggregate, because aggregate water absorption is relatively big, makes that crack-resistant performance of concrete is poor, it is bigger to shrink.
Summary of the invention
It is an object of the invention to provide a kind of discarded fired brick regeneration C35 steel fiber reinforced concrete, intensity stabilization, and easily
Property, mobility, water retention property are good.
Another object of the present invention is to provide the preparation method of a kind of discarded fired brick regeneration C35 steel fiber reinforced concrete,
Step is simple and environmentally-friendly, it is easy to construction.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of discarded fired brick regeneration C35 steel fiber reinforced concrete, by cement, steel fibre, discarded fired brick regenerated coarse aggregate,
Fine aggregate, water and water reducer 1:0.096 ~ 0.160:1.679 in mass ratio ~ 1.737:0.653 ~ 0.817:0.367～0.397:
0.006 ~ 0.01 is formulated.
According to above-mentioned discarded fired brick regeneration C35 steel fiber reinforced concrete, described cement is P. O 42.5 normal silicate
Cement.
According to above-mentioned discarded fired brick regeneration C35 steel fiber reinforced concrete, described steel fibre is crotch shape, a diameter of
0.3 mm ~ 0.8 mm, a length of 30 mm ~ 40 mm, steel fibre tensile strength >=1100 N/mm2。
According to above-mentioned discarded fired brick regeneration C35 steel fiber reinforced concrete, described discarded fired brick regenerated coarse aggregate comes
From the discarded fired brick building waste removed in city-building, particle diameter d1Being 5 mm ~ 25 mm, bulk density is 1600 ~ 1700
kg/m3, crush index is 25～32%, and water absorption rate is 20 ~ 30%.
According to above-mentioned discarded fired brick regeneration C35 steel fiber reinforced concrete, described discarded fired brick regenerated coarse aggregate grain
Footpath d1Mass Distribution is: 5 mm≤d1≤ 10 mm are 20% ~ 25%, 10 mm ＜ d1≤ 16 mm are 25% ~ 30%, 16 mm ＜ d1≤
20 mm are 25% ~ 30%, 20 mm ＜ d1≤ 25 mm are 20% ~ 30%.
According to above-mentioned discarded fired brick regeneration C35 steel fiber reinforced concrete, described fine aggregate is fluvial sand or Machine-made Sand.
According to above-mentioned discarded fired brick regeneration C35 steel fiber reinforced concrete, described fine aggregate apparent density is 2500
kg/m3~2700 kg/m3, moisture content is 3 ~ 5%, particle diameter d2Scope is: 0.15 mm ~ 2.36 mm.
According to above-mentioned discarded fired brick regeneration C35 steel fiber reinforced concrete, described fine aggregate particle diameter d2Mass Distribution is:
0.15 mm≤d2≤ 0.3 mm is 9% ~ 13%, 0.3 mm ＜ d2≤ 0.6 mm is 25%～31%, 0.6 mm ＜ d2≤ 1.18 mm are
35%～42%, 1.18 mm ＜ d2≤ 2.36 mm are 20% ~ 25%.
According to above-mentioned discarded fired brick regeneration C35 steel fiber reinforced concrete, described water reducer is the efficient diminishing of polycarboxylic acids
Agent.
The preparation method of above-mentioned discarded fired brick regeneration C35 steel fiber reinforced concrete, comprises the following steps:
(1) discarded fired brick is broken, screening obtains regenerated coarse aggregate；
(2) cement, steel fibre, discarded fired brick regenerated coarse aggregate, fine aggregate, water and diminishing are prepared by above-mentioned mass ratio
Agent；
(3) moistening blender cylinder in advance, then puts into stirring by discarded fired brick regenerated coarse aggregate, steel fibre, cement
In machine, pre-stirring 2～3 min so that discarded fired brick regenerated coarse aggregate, steel fibre are uniform with cement mix；
(4) fine aggregate, water, water reducer are sequentially added in blender, mix 3 ~ 10 min, until mixture mixing is all
Even.
The positive beneficial effect of the present invention:
The present invention discards fired brick regeneration C35 steel fiber reinforced concrete and is regenerated thick bone by cement, steel fibre, discarded fired brick
Material, fine aggregate, water and water reducer are formulated, and steel fibre is scattered in around aggregate uniformly, the cement that cement, sand are formed with water
Mortar is wrapped in the surface of aggregate and steel fibre, the gap between filler aggregate and aggregate, aggregate and fiber, and plays lubrication work
With, make concrete mix have certain workability, aggregate, steel fibre are bonded to hard, close by the cement slurry after hardening
Real entirety.
Raw material of the present invention is discarded fired brick regenerated coarse aggregate and is come from the discarded fired brick building waste that city-building is removed,
Achieve the Appropriate application of resource；Steel fibre can promote useless brick aggregate to be uniformly distributed, and makes the aggregate will not be because of during vibrating
Density is relatively low and floats, and makes concrete stress frame more complete, and then fundamentally improves the comprcssive strength of concrete.
Simultaneously as steel fibre and concrete have excellent adhesive property so that steel fibre can increase substantially the anti-of concrete
Fragility energy, carrying out of suppression crack, improve the mechanical property such as the comprcssive strength of concrete, split tensile strength prepared by useless fired brick aggregate
Energy.
It is functional that gained of the present invention discards fired brick regeneration C35 steel fiber reinforced concrete workability, mobility, water-retaining property,
Comprcssive strength, split tensile strength are high, and preparation process is simple and environmentally-friendly, it is easy to construction.
Detailed description of the invention
Embodiment 1
A kind of discarded fired brick regeneration C35 steel fiber reinforced concrete, by cement, steel fibre, discarded fired brick regenerated coarse aggregate,
1:0.096:1.679:0.653:0.397:0.006 in mass ratio is formulated for fine aggregate, water and water reducer.
Described cement is P. O 42.5 Portland cement.
Described discarded fired brick regenerated coarse aggregate bulk density is 1611 kg/m3, crush index is 31.8%, water absorption rate
30%, particle diameter d1Mass Distribution is: 5 mm≤d1≤ 10 mm are 22%, 10mm ＜ d1≤ 16mm is 30%, 16 mm ＜ d1≤20 mm
It is 26%, 20 mm ＜ d1≤ 25 mm are 22%.
Described fine aggregate is fluvial sand, and apparent density is 2527 kg/m3, moisture content 5%, particle diameter d2Scope is: 0.15 mm ~
2.36 mm, particle diameter is distributed as: 0.15 mm≤d2≤ 0.3 mm is 9%, 0.3 mm ＜ d2≤ 0.6 mm is 30%, 0.6 mm ＜ d2
≤ 1.18 mm are 36%, 1.18 mm ＜ d2≤ 2.36 mm are 25%.
Described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
Steel of the present invention is tested fine by GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard " regulation
The service behaviour of dimension concrete, the gained C35 steel fiber reinforced concrete slump is 80 mm.
Embodiment 2
A kind of discarded fired brick regeneration C35 steel fiber reinforced concrete, by cement, steel fibre, discarded fired brick regenerated coarse aggregate,
1:0.112:1.695:0.693:0.389:0.007 in mass ratio is formulated for fine aggregate, water and water reducer.
Described cement is P. O 42.5 Portland cement.
Described discarded fired brick regenerated coarse aggregate bulk density is 1632 kg/m3, crush index is 30.1%, water absorption rate
26%, particle diameter d1Mass Distribution is: 5 mm≤d1≤ 10 mm are 25%, 10mm ＜ d1≤ 16mm is 28%, 16 mm ＜ d1≤20 mm
It is 25%, 20 mm ＜ d1≤ 25 mm are 22%.
Described fine aggregate is Machine-made Sand, and apparent density is 2570 kg/m3, moisture content 4%, particle diameter d2Scope is: 0.15
Mm ~ 2.36 mm, particle diameter Mass Distribution is: 0.15 mm≤d2≤ 0.3 mm is 10%, 0.3 mm ＜ d2≤ 0.6 mm is 26%, 0.6
Mm ＜ d2≤ 1.18 mm are 40%, 1.18 mm ＜ d2≤ 2.36 mm are 24%.
Described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
Steel of the present invention is tested fine by GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard " regulation
The service behaviour of dimension concrete, the gained C35 steel fiber reinforced concrete slump is 80 mm.
Embodiment 3
A kind of discarded fired brick regeneration C35 steel fiber reinforced concrete, by cement, steel fibre, discarded fired brick regenerated coarse aggregate,
1:0.128:1.708:0.732:0.382:0.008 in mass ratio is formulated for fine aggregate, water and water reducer.
Described cement is P. O 42.5 Portland cement.
Described discarded fired brick regenerated coarse aggregate bulk density is 1651 kg/m3, crush index is 29.3%, water absorption rate
23%, particle diameter Mass Distribution is: 5 mm≤d1≤ 10 mm are 22%, 10mm ＜ d1≤ 16mm is 27%, 16 mm ＜ d1≤ 20 mm are
28%, 20 mm ＜ d1≤ 25 mm are 23%.
Described fine aggregate is fluvial sand, and apparent density is 2605 kg/m3, moisture content 3%, particle size range is: 0.15 mm ~
2.36 mm, particle diameter Mass Distribution is: 0.15 mm≤d2≤ 0.3 mm is 10%, 0.3 mm ＜ d2≤ 0.6 mm is 28%, 0.6 mm
＜ d2≤ 1.18 mm are 39%, 1.18 mm ＜ d2≤ 2.36 mm are 23%.
Described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
Steel of the present invention is tested fine by GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard " regulation
The service behaviour of dimension concrete, the gained C35 steel fiber reinforced concrete slump is 80 mm.
Embodiment 4
A kind of discarded fired brick regeneration C35 steel fiber reinforced concrete, by cement, steel fibre, discarded fired brick regenerated coarse aggregate,
1:0.144:1.725:0.775:0.374:0.009 in mass ratio is formulated for fine aggregate, water and water reducer.
Described cement is P. O 42.5 Portland cement.
Described discarded fired brick regenerated coarse aggregate bulk density is 1673 kg/m3, crush index is 28.6%, water absorption rate
22%, particle diameter Mass Distribution is: 5 mm≤d1≤ 10 mm are 20%, 10mm ＜ d1≤ 16mm is 25%, 16 mm ＜ d1≤ 20 mm are
25%, 20 mm ＜ d1≤ 25 mm are 30%.
Described fine aggregate is Machine-made Sand, and apparent density is 2650 kg/m3, moisture content 3%, particle diameter d1Scope is: 0.15
Mm ~ 2.36 mm, particle diameter d2Mass Distribution is: 0.15 mm≤d2≤ 0.3 mm is 11%, 0.3 mm ＜ d2≤ 0.6 mm is 25%,
0.6 mm ＜ d2≤ 1.18 mm are 40%, 1.18 mm ＜ d2≤ 2.36 mm are 24%.
Described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
Steel of the present invention is tested fine by GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard " regulation
The service behaviour of dimension concrete, the gained C35 steel fiber reinforced concrete slump is 80 mm.
Embodiment 5
A kind of discarded fired brick regeneration C35 steel fiber reinforced concrete, by cement, steel fibre, discarded fired brick regenerated coarse aggregate,
1:0.160:1.737:0.817:0.367:0.010 in mass ratio is formulated for fine aggregate, water and water reducer.
Described cement is P. O 42.5 Portland cement.
Described discarded fired brick regenerated coarse aggregate bulk density is 1692 kg/m3, crush index is 25.1%, water absorption rate
20%, particle diameter d1Mass Distribution is: 5 mm≤d1≤ 10 mm are 22%, 10mm ＜ d1≤ 16mm is 28%, 16 mm ＜ d1≤20 mm
It is 30%, 20 mm ＜ d1≤ 25 mm are 20%.
Described fine aggregate is Machine-made Sand, and apparent density is 2690 kg/m3, moisture content 3%, particle diameter d2Scope is: 0.15
Mm ~ 2.36 mm, particle diameter d2Mass Distribution is: 0.15 mm≤d2≤ 0.3 mm is 13%, 0.3 mm ＜ d2≤ 0.6 mm is 25%,
0.6 mm ＜ d2≤ 1.18 mm are 42%, 1.18 mm ＜ d2≤ 2.36 mm are 20%.
Described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
Steel of the present invention is tested fine by GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard " regulation
The service behaviour of dimension concrete, the gained C35 steel fiber reinforced concrete slump is 80 mm.
The preparation method of the discarded fired brick regeneration C35 steel fiber reinforced concrete that one of above-described embodiment 1～5 is arbitrarily described it
One, comprise the following steps:
(1) discarded fired brick is broken, screening obtains regenerated coarse aggregate；
(2) cement, steel fibre, discarded fired brick regenerated coarse aggregate, fine aggregate, water and diminishing are prepared by above-mentioned mass ratio
Agent；
(3) moistening blender cylinder in advance, then puts into stirring by discarded fired brick regenerated coarse aggregate, steel fibre, cement
In machine, pre-stirring 2 min so that discarded fired brick regenerated coarse aggregate, steel fibre are uniform with cement mix；
(4) fine aggregate, water, high-efficiency water-reducing agent of poly-carboxylic acid are sequentially added in blender, mix 3 ~ 10 min, until mix
Thing mix homogeneously.
The preparation method of the discarded fired brick regeneration C35 steel fiber reinforced concrete that one of above-described embodiment 1～5 is arbitrarily described it
Two, comprise the following steps:
(1) discarded fired brick is broken, screening obtains regenerated coarse aggregate；
(2) cement, steel fibre, discarded fired brick regenerated coarse aggregate, fine aggregate, water and diminishing are prepared by above-mentioned mass ratio
Agent；
(3) moistening blender cylinder in advance, then puts into stirring by discarded fired brick regenerated coarse aggregate, steel fibre, cement
In machine, pre-stirring 2 min so that discarded fired brick regenerated coarse aggregate, steel fibre are uniform with cement mix；
(4) fine aggregate, water, high-efficiency water-reducing agent of poly-carboxylic acid are sequentially added in blender, mix 3 ~ 10 min, until mix
Thing mix homogeneously.
The preparation method of the discarded fired brick regeneration C35 steel fiber reinforced concrete that one of above-described embodiment 1～5 is arbitrarily described it
Three, comprise the following steps:
(1) discarded fired brick is broken, screening obtains regenerated coarse aggregate；
(2) cement, steel fibre, discarded fired brick regenerated coarse aggregate, fine aggregate, water and diminishing are prepared by above-mentioned mass ratio
Agent；
(3) moistening blender cylinder in advance, then puts into stirring by discarded fired brick regenerated coarse aggregate, steel fibre, cement
In machine, pre-stirring 3 min so that discarded fired brick regenerated coarse aggregate, steel fibre are uniform with cement mix；
(4) fine aggregate, water, high-efficiency water-reducing agent of poly-carboxylic acid are sequentially added in blender, mix 3 ~ 10 min, until mix
Thing mix homogeneously.
Strength test
Testing procedure: the embodiment of the present invention 1～5 gained steel fiber reinforced concrete is the most disposably loaded die trial, during charging
Plug and pound along each die trial wall with spatula, then die trial is put on a vibration table, vibrate at twice, scrape off unnecessary the discarding of die trial mouth
Fired brick regenerated coarse aggregate steel fiber reinforced concrete, then with floating concrete curing box maintenance 24 h that puts into of spatula, form removal,
After move to concrete standard fog room in carry out maintenance, after 28 days take out.
According to the prescriptive procedure of GB/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", to discarded burning
Knot brick regenerated coarse aggregate steel fiber reinforced concrete test block carries out intensity detection, and test result is shown in Table 1.
The strength test results of table 1 embodiment of the present invention 1～5 gained steel fiber reinforced concrete
。
Claims (7)
1. a discarded fired brick regeneration C35 steel fiber reinforced concrete, it is characterised in that by cement, steel fibre, discarded fired brick again
Raw coarse aggregate, fine aggregate, water and water reducer 1:0.096～0.160:1.679 in mass ratio～1.737:0.653～0.817:
0.367～0.397:0.006～0.01 is formulated；Described discarded fired brick regenerated coarse aggregate comes from city-building and removes
Discarded fired brick building waste, particle diameter d1Being 5 mm～25 mm, bulk density is 1600 kg/m3～1700 kg/m3, crushing
Index is 25～32%, and water absorption rate is 20%～30%；Described discarded fired brick regenerated coarse aggregate particle diameter d1Mass Distribution is: 5
mm≤d1≤ 10 mm are 20%～25%, 10 mm ＜ d1≤ 16 mm are 25%～30%, 16 mm ＜ d1≤ 20 mm are 25%～30%,
20 mm ＜ d1≤ 25 mm are 20%～30%.
Discarded fired brick the most according to claim 1 regeneration C35 steel fiber reinforced concrete, it is characterised in that described cement is
P. O 42.5 Portland cement.
Discarded fired brick the most according to claim 1 regeneration C35 steel fiber reinforced concrete, it is characterised in that described steel is fine
Dimension is crotch shape, a diameter of 0.3 mm～0.8 mm, a length of 30 mm～40 mm, steel fibre tensile strength >=1100 N/
mm2。
Discarded fired brick the most according to claim 1 regeneration C35 steel fiber reinforced concrete, it is characterised in that described thin bone
Material is fluvial sand or Machine-made Sand, and described fine aggregate apparent density is 2500 kg/m3～2700 kg/m3, moisture content is 3%～5%,
Particle diameter d2Scope is: 0.15 mm～2.36 mm.
Discarded fired brick the most according to claim 4 regeneration C35 steel fiber reinforced concrete, it is characterised in that described thin bone
Material particle diameter d2Mass Distribution is: 0.15 mm≤d2≤ 0.3 mm is 9%～13%, 0.3 mm ＜ d2≤ 0.6 mm is 25%～31%,
0.6 mm ＜ d2≤ 1.18 mm are 35%～42%, 1.18 mm ＜ d2≤ 2.36 mm are 20%～25%.
Discarded fired brick the most according to claim 1 regeneration C35 steel fiber reinforced concrete, described water reducer is that polycarboxylic acids is high
Effect water reducer.
7. the preparation method of the discarded fired brick regeneration C35 steel fiber reinforced concrete described in a claim 1, it is characterised in that
Comprise the following steps:
(1) discarded fired brick is broken, screening obtains regenerated coarse aggregate；
(2) mass ratio as described in claim 1 prepare cement, steel fibre, discarded fired brick regenerated coarse aggregate, fine aggregate, water and
Water reducer；
(3) moistening blender cylinder in advance, then puts in blender by discarded fired brick regenerated coarse aggregate, steel fibre, cement,
Pre-stirring 2～3 min so that discarded fired brick regenerated coarse aggregate, steel fibre are uniform with cement mix；
(4) fine aggregate, water, water reducer are sequentially added in blender, stir 3～10 min, until mixture mix homogeneously.
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| CN105622014A (en) * | 2015-12-28 | 2016-06-01 | 郑州大学 | Multi-strength regeneration brick aggregate fiber concrete and preparing method thereof |
| CN106186853A (en) * | 2016-06-29 | 2016-12-07 | 攀枝花学院 | A kind of preparation method of regeneration concrete |
| CN106365570A (en) * | 2016-08-25 | 2017-02-01 | 济南轨道交通集团有限公司 | Autoclaved brick prepared from waste clay brick and preparation method thereof |
| CN108218319B (en) * | 2018-01-26 | 2020-10-30 | 湖南科技学院 | Steel fiber polystyrene particle regenerated thermal insulation concrete and preparation method thereof |
| CN108793840A (en) * | 2018-06-07 | 2018-11-13 | 西安理工大学 | A kind of high-durability regeneration concrete and preparation method thereof adding waste and old iron wire |
| CN108840622A (en) * | 2018-06-15 | 2018-11-20 | 湖南大学 | Aggregate C30 concrete of brick containing recycled sinter and preparation method thereof |
| CN109180091A (en) * | 2018-10-19 | 2019-01-11 | 中铁十八局集团有限公司 | A kind of machine-made sand concrete containing steel fibre |
| CN111393094A (en) * | 2019-01-03 | 2020-07-10 | 东莞市易发混凝土有限公司 | Recycled aggregate concrete and preparation method thereof |
| CN112777988A (en) * | 2021-03-26 | 2021-05-11 | 西安建筑科技大学 | Steel fiber recycled concrete with C40 strength grade |
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