CN109265038A - A kind of modification regeneration coarse aggregate and its method for preparing regeneration concrete - Google Patents
A kind of modification regeneration coarse aggregate and its method for preparing regeneration concrete Download PDFInfo
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- CN109265038A CN109265038A CN201811354413.4A CN201811354413A CN109265038A CN 109265038 A CN109265038 A CN 109265038A CN 201811354413 A CN201811354413 A CN 201811354413A CN 109265038 A CN109265038 A CN 109265038A
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- coarse aggregate
- regeneration
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- aggregate
- concrete
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
-
- 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
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of modification regeneration coarse aggregates, are obtained by the regenerated coarse aggregate of grade 5-10mm and 10-20mm by being uniformly mixed again with the ratio of 35%-45% ︰ 55%-65% after the immersion treatment in the waste mud liquid that solid content is 1%-9%.By the method that it prepares regeneration concrete: the modification regeneration coarse aggregate that volume ratio is 5%-25% being substituted natural coarse aggregate in equal volume, then mixes coarse aggregate, 30.56~32.45 natural sands, 9.80~10.20 cement, 2.65~2.75 flyash, 3.92~4.08 ground granulated blast furnace slags, 0.29~0.31 water-reducing agent and 7.64~7.96 drinking water for 45.79~48.61 and is stirred and is made.Modification regeneration coarse aggregate surface roughness of the present invention is low, porosity is low, water absorption rate is low, and crush index is high, and the regeneration concrete slump of production is low, and elasticity modulus is high, and contract with dry rate and creep are low.
Description
Technical field
The invention belongs to the field of building materials coagulation great soil group, it is related to a kind of modification regeneration coarse aggregate and its manufactured is suitable for
The regeneration concrete that concrete construction of the strength grade less than or equal to C40 pours.
Background technique
With rapid development of economy, in many big cities in China, the waste that building industry generates has been changed to public hazards.This
A little wastes not only cause serious destruction to environment, but also the space of existence is fought for the mankind, and seriously affect country can
Sustainable development.Therefore, exploitation reduces, recycles and utilize the new technology of waste material of buildings extremely urgent.
Waste material of buildings occurs mainly in the removal of old building and the building course of new building, therefore, reduces building
Object must just remove and build in engineering, using advanced management technology and removal building technology.It is well known that waste material of buildings
Generally it is made of broken concrete, clay brick and ceramic tile, sand and dust, sawdust, plastics and waste paper, old metal etc..Concrete is broken
Block is usually the maximum component part of waste material of buildings, can be used in substitution concrete by the broken concrete of crushing and screening
Natural aggregate or be used to do the basis of road.This type salvage material is just called recycled aggregates.Circular regeneration
Aggregate has been applied successfully in the building industry of some European and American developed countries, but is mainly used in non-structural concrete and road
On the basis of road, mainly due to recycled aggregate rough surface, porosity height, water absorption rate are high, crush index is low for this.Therefore, when again
When raw aggregate is used to manufacture concrete, the slump of concrete can be brought to be difficult to control, intensity is low, elasticity modulus decline, drying shrinkage
Rate and creep be high and the weakness such as durability difference, so as to cause recycled aggregate in structural concrete using very limited.Separately
Outer ready-mixed concrete enterprise is every year because rinsing mixer truck, a large amount of waste sludge slurries of mixing plant generation, these waste sludge slurries row
Generation large amount of sewage is run out, pollutes environment, and keep the sewage treatment in later period more difficult.
Summary of the invention
The object of the invention is to solve the above-mentioned problems in the prior art, provide a kind of modification regeneration coarse aggregate and
It prepares the method for regeneration concrete；Modification regeneration coarse aggregate surface roughness is low, porosity is low, water absorption rate is low for this, and crushing refers to
The regeneration concrete slump of absolute altitude, production is low, and intensity is high, and elasticity modulus is high, and contract with dry rate and creep are low, and durability becomes strong,
Quality is stablized, and mixture is functional, and application range is more and more wider, can be suitably used for the concrete that strength grade is less than or equal to C40
Construction casting；Resource has been saved in application of the invention, is effectively reduced the generation of building waste, is reduced ready-mixed concrete enterprise
Problem of environmental pollution.
First purpose to realize the present invention, the technical solution of the invention is as follows: a kind of modification regeneration coarse aggregate,
It is made of following methods: the discarded concrete after hardening being broken into two kinds of grades of 5-10mm and 10-20mm again with sand making machine
Raw coarse aggregate；Two kinds of regenerated coarse aggregates are soaked in respectively and rinse mixer truck, the useless mud that the solid content that mixing plant generates is 1%-9%
In slurries, according to requirement circulation immersion 24 hours or more of 5 minutes of minimum stirring within an hour, with screening of being tiled, prevent
The aggregate for being only wrapped with waste mud liquid is mutually bonded to the cement block of large volume, to dry tack free or first goes water removal again for screenings is cool
It is cool to dry tack free；By treated partial size be 5-10mm modification regeneration coarse aggregate and partial size be 10-20mm modification regeneration
Coarse aggregate is uniformly mixed with the ratio of 35%-45% ︰ 55%-65%, is mixed into the modification regeneration coarse aggregate that partial size is 5-20mm.
Second purpose to realize the present invention, the technical solution of the invention is as follows: a kind of thick with above-mentioned modification regeneration
The method that aggregate prepares regeneration concrete, comprising the following steps:
(1) natural coarse aggregate is substituted in equal volume: the modification regeneration coarse aggregate is substituted in equal volume with the volume ratio of 5%-25%
It is spare to be prepared into mixing coarse aggregate for natural coarse aggregate；The particle size content of natural coarse aggregate: partial size accounts for 0-5%, partial size for 0-5mm's
10-20% is accounted for for 5-10mm, partial size is that 10-20mm accounts for 40-80%, and partial size is that 20mm or more accounts for 0-10%；
(2) regeneration concrete is prepared, by weight calculating, is made of following material, 45.79~48.61 mixing is thick
Aggregate, 30.56~32.45 natural sand, 9.80~10.20 cement, 2.65~2.75 flyash, 3.92~4.08 height
Furnace slag powders, 0.29~0.31 water-reducing agent and 7.64~7.96 drinking water；The water-reducing agent of the amount is dissolved in the amount
It is diluted in drinking water；Mixing coarse aggregate, natural sand, cement, flyash and the ground granulated blast furnace slag of the amount are poured into stirring
It being stirred in machine, after mixing evenly, the diminishing agent solution diluted is added and continues to stir, mixing time is not less than 30s,
It stirs evenly to get regeneration concrete.
It is further preferred that the water-reducing agent in the step (2) is poly carboxylic acid series water reducer.
The present invention impregnates the regenerated coarse aggregate of two kinds of grades with waste mud liquid respectively, is because regenerated coarse aggregate exists
Because being generated a large amount of micro-cracks by external force in preparation process, micro-crack can be filled and be bonded to waste mud liquid, and it is thick to improve regeneration
The disadvantages such as aggregate surface is coarse, corner angle are more, porosity is high, water absorption rate is big, crush index is low, partial size are the thick bone of regeneration of 5-10mm
The hole of the regenerated coarse aggregate of material filling 10-20mm forms good gradation, and formation surface roughness reduces, corner angle are rounded cunning,
Porosity reduces, water absorption rate reduces, the modification regeneration coarse aggregate that crush index is got higher.It is replaced in equal volume with the modification regeneration coarse aggregate
For natural coarse aggregate, natural resources have on the one hand been saved, have reduced the soil occupied to disposed waste processing, it on the other hand can be with
Guarantee the constancy of volume of regeneration concrete；Natural sand can fill the hole of coarse aggregate as fine aggregate；Cement is as inorganic glue
Gel material, before concrete hardening, cement and water form cement slurry and play lubricating action, assign concrete mix certain flowing
Property, cementation is played convenient for construction, after cement slurry hardening, sandstone aggregate is cementing integral, intensity is generated, hard water is become
Mudstone；Flyash and ground granulated blast furnace slag substitute cement as admixture, can with save the cost, improve later strength, be effectively relieved
The heat of hydration, and can reach waste utilization, protect the purpose of environment；Using poly carboxylic acid series water reducer as additive, can reduce
Coagulation local prescription water consumption improves concrete strength, and can improve concrete mixing physical property to reduce water-binder ratio
Energy.Cement, flyash, miberal powder and water form slurry, and natural sand formation cement mortar is filled and wrapped up before hydration reaction occurs,
Mortar fills and wraps up coarse aggregate；Over time, hydration reaction gradually carries out, and cement slurry starts to generate intensity, by day
Right sand is tightly bonded together with coarse aggregate.The regeneration concrete slump prepared with above-mentioned modification regeneration coarse aggregate is low, intensity
Height, elasticity modulus is high, and contract with dry rate and creep are low, and durability becomes strong, and quality is stablized, and mixture is functional, and application range is more next
It is wider, it can be suitably used for concrete construction of the strength grade less than or equal to C40 and pour.Resource has been saved in application of the invention, effectively
The generation for reducing building waste reduces ready-mixed concrete corporate environment pollution problem, realizes that Concrete Industry green can be held
Supervention exhibition.
Specific embodiment
The present invention will be further described combined with specific embodiments below.
Embodiment 1, the modification regeneration coarse aggregate of the present embodiment, is made of following methods: will be after hardening with sand making machine
Discarded concrete is broken into the regenerated coarse aggregate of two kinds of grades of 5-10mm and 10-20mm.Two kinds of regenerated coarse aggregates are impregnated respectively
In the waste mud liquid that the solid content for rinsing mixer truck, mixing plant generates is 5%, according to minimum stirring within an hour 5 minutes
It is required that circulation immersion 24 hours or more, with screening of being tiled, the aggregate for being wrapped with waste mud liquid is prevented mutually to be bonded to substantially
Long-pending cement block is cool to dry tack free by screenings.The modification regeneration coarse aggregate and partial size for being 5-10mm by treated partial size
For 10-20mm modification regeneration coarse aggregate with the ratio of 40% ︰ 60% be uniformly mixed, be mixed into partial size be 5-20mm modification again
Raw coarse aggregate.The method for preparing regeneration concrete with the modification regeneration coarse aggregate, comprising the following steps: (1) substitute day in equal volume
Right coarse aggregate: substituting natural coarse aggregate for the modification regeneration coarse aggregate with 10% volume ratio in equal volume, and it is thick to be prepared into mixing
Aggregate is spare.The particle size content of natural coarse aggregate: partial size is the arbitrary value of 0-5mm accounted in 0-5%, and partial size is that 5-10mm accounts for 10-
Arbitrary value in 20%, partial size are that 10-20mm accounts for the arbitrary value in 40-80%, and partial size accounts for any in 0-10% for 20mm or more
Value.(2) regeneration concrete is prepared, by weight calculating, is made of following material, the 46.25 mixing coarse aggregate,
30.87 natural sand, 9.90 cement, 2.67 flyash, 3.96 ground granulated blast furnace slag, 0.297 water-reducing agent and 7.72
Drinking water.The water-reducing agent of the amount is dissolved in the drinking water of the amount and being diluted；By the mixing coarse aggregate of the amount, naturally
Sand, cement, flyash and ground granulated blast furnace slag, which pour into blender, to be stirred, and after mixing evenly, the water-reducing agent diluted is added
Solution continues to stir, and mixing time is not less than 30s, stirs evenly to get regeneration concrete.Preferably, the step (2)
In water-reducing agent be poly carboxylic acid series water reducer.
1 5-10mm and 10-20mm regenerated coarse aggregate of table impregnates forward and backward performance comparison, observes regenerated coarse aggregate surface,
Before surface roughness after immersion is significantly better than immersion.As can be seen from the table: stacked area and apparent density all become after immersion
Greatly, porosity increases, water absorption rate reduces, and crush values are got higher.
Embodiment 2, other features of the modification regeneration coarse aggregate of the present embodiment are with embodiment 1, and only waste mud liquid generates
Solid content be 9%, the modification regeneration coarse aggregate that treated partial size is 5-10mm and the modification regeneration that partial size is 10-20mm are thick
Aggregate mixed proportion is 45% ︰ 55%.The present embodiment prepares in the method for regeneration concrete that other features are with embodiment 1, only
The volume ratio that modification regeneration coarse aggregate substitutes natural coarse aggregate in equal volume is 25；The mixing coarse aggregate accounts for 45.79, natural sand and accounts for
32.45, cement, which accounts for 10.00, flyash and accounts for 2.75, ground granulated blast furnace slag and account for 4.08, water-reducing agent and account for 0.31, drinking water, accounts for 7.96.
Embodiment 3, other features of the modification regeneration coarse aggregate of the present embodiment are with embodiment 1, and only waste mud liquid generates
Solid content be 1%, the modification regeneration coarse aggregate that treated partial size is 5-10mm and the modification regeneration that partial size is 10-20mm are thick
Aggregate mixed proportion is 35% ︰ 65%.The present embodiment prepares in the method for regeneration concrete that other features are with embodiment 1, only
The volume ratio that modification regeneration coarse aggregate substitutes natural coarse aggregate in equal volume is 5；The mixing coarse aggregate accounts for 48.61, natural sand and accounts for
30.56, cement, which accounts for 9.8, flyash and accounts for 2.65, ground granulated blast furnace slag and account for 3.92, water-reducing agent and account for 0.29, drinking water, accounts for 7.64.
Embodiment 4, other features of the modification regeneration coarse aggregate of the present embodiment are with embodiment 1, and only waste mud liquid generates
Solid content be 3%, the modification regeneration coarse aggregate that treated partial size is 5-10mm and the modification regeneration that partial size is 10-20mm are thick
Aggregate mixed proportion is 43% ︰ 57%.The present embodiment prepares in the method for regeneration concrete that other features are with embodiment 1, only
The volume ratio that modification regeneration coarse aggregate substitutes natural coarse aggregate in equal volume is 15；The mixing coarse aggregate accounts for 47.1, natural sand and accounts for
31.5, cement, which accounts for 10.2, flyash and accounts for 2.71, ground granulated blast furnace slag and account for 3.98, water-reducing agent and account for 0.298, drinking water, accounts for 7.80.
Embodiment 5, other features of the modification regeneration coarse aggregate of the present embodiment are with embodiment 1, and only waste mud liquid generates
Solid content be 7%, the modification regeneration coarse aggregate that treated partial size is 5-10mm and the modification regeneration that partial size is 10-20mm are thick
Aggregate mixed proportion is 38% ︰ 62%.The present embodiment prepares in the method for regeneration concrete that other features are with embodiment 1, only
The volume ratio that modification regeneration coarse aggregate substitutes natural coarse aggregate in equal volume is 20；The mixing coarse aggregate accounts for 47.9, natural sand and accounts for
31.9, cement, which accounts for 9.5, flyash and accounts for 2.74, ground granulated blast furnace slag and account for 4.02, water-reducing agent and account for 0.30, drinking water, accounts for 7.90.
Above-described embodiment be only it is preferably good and illustrative, those skilled in the art can also retouching according to this patent
It states, selection uses other equivalent technologies, these are all covered by the protection scope of this patent.
Claims (3)
1. a kind of modification regeneration coarse aggregate, it is characterised in that: it is made of following methods: will be discarded mixed after hardening with sand making machine
Solidifying soil is broken into the regenerated coarse aggregate of two kinds of grades of 5-10mm and 10-20mm；Two kinds of regenerated coarse aggregates are soaked in flushing respectively
The solid content that mixer truck, mixing plant generate is in the waste mud liquid of 1%-9%, according to the requirement of minimum stirring 5 minutes within an hour
Circulation immersion 24 hours or more, with screening of being tiled, the aggregate for being wrapped with waste mud liquid is prevented mutually to be bonded to large volume
Cement block to dry tack free or first goes water removal cool to dry tack free again for screenings is cool；By treated, partial size is 5-10mm's
Modification regeneration coarse aggregate and partial size are that the modification regeneration coarse aggregate of 10-20mm is uniformly mixed with the ratio of 35%-45% ︰ 55%-65%,
It is mixed into the modification regeneration coarse aggregate that partial size is 5-20mm.
2. a kind of method for preparing regeneration concrete with modification regeneration coarse aggregate described in claim 1, it is characterised in that: including
Following steps:
(1) natural coarse aggregate is substituted in equal volume: the modification regeneration coarse aggregate is substituted in equal volume with the volume ratio of 5%-25%
It is spare to be prepared into mixing coarse aggregate for natural coarse aggregate；The particle size content of natural coarse aggregate: partial size accounts for 0-5%, partial size for 0-5mm's
10-20% is accounted for for 5-10mm, partial size is that 10-20mm accounts for 40-80%, and partial size is that 20mm or more accounts for 0-10%；
(2) regeneration concrete is prepared, by weight calculating, is made of following material, 45.79~48.61 mixing is thick
Aggregate, 30.56~32.45 natural sand, 9.80~10.20 cement, 2.65~2.75 flyash, 3.92~4.08 height
Furnace slag powders, 0.29~0.31 water-reducing agent and 7.64~7.96 drinking water；The water-reducing agent of the amount is dissolved in the amount
It is diluted in drinking water；Mixing coarse aggregate, natural sand, cement, flyash and the ground granulated blast furnace slag of the amount are poured into stirring
It being stirred in machine, after mixing evenly, the diminishing agent solution diluted is added and continues to stir, mixing time is not less than 30s,
It stirs evenly to get regeneration concrete.
3. the method according to claim 2 for preparing regeneration concrete, it is characterised in that: the diminishing in the step (2)
Agent is poly carboxylic acid series water reducer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811354413.4A CN109265038A (en) | 2018-11-14 | 2018-11-14 | A kind of modification regeneration coarse aggregate and its method for preparing regeneration concrete |
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| CN201811354413.4A CN109265038A (en) | 2018-11-14 | 2018-11-14 | A kind of modification regeneration coarse aggregate and its method for preparing regeneration concrete |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109879619A (en) * | 2019-02-23 | 2019-06-14 | 陕西秦汉恒盛新型建材科技股份有限公司 | The intensifying method of recycled aggregate pervious concrete and preparation method thereof and its used recycled aggregate |
| CN110922080A (en) * | 2019-11-27 | 2020-03-27 | 长安大学 | Modified recycled coarse aggregate, permeable water-storing concrete and preparation method thereof |
| CN110981244A (en) * | 2019-12-30 | 2020-04-10 | 河北红墙新材料有限公司 | Concrete residual slurry treatment process |
| CN111875309A (en) * | 2020-06-22 | 2020-11-03 | 浙江二十冶建设有限公司 | Recycled concrete and preparation method and application thereof |
| CN112239332A (en) * | 2020-09-29 | 2021-01-19 | 江苏晨马建筑科技有限公司 | Preparation process of recycled concrete aggregate |
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| CN104829178A (en) * | 2015-04-21 | 2015-08-12 | 江苏德丰建设集团有限公司 | C30 grade steel-doped slag recycled aggregate self compacting concrete and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109879619A (en) * | 2019-02-23 | 2019-06-14 | 陕西秦汉恒盛新型建材科技股份有限公司 | The intensifying method of recycled aggregate pervious concrete and preparation method thereof and its used recycled aggregate |
| CN110922080A (en) * | 2019-11-27 | 2020-03-27 | 长安大学 | Modified recycled coarse aggregate, permeable water-storing concrete and preparation method thereof |
| CN110981244A (en) * | 2019-12-30 | 2020-04-10 | 河北红墙新材料有限公司 | Concrete residual slurry treatment process |
| CN111875309A (en) * | 2020-06-22 | 2020-11-03 | 浙江二十冶建设有限公司 | Recycled concrete and preparation method and application thereof |
| CN112239332A (en) * | 2020-09-29 | 2021-01-19 | 江苏晨马建筑科技有限公司 | Preparation process of recycled concrete aggregate |
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