CN109020390A - A kind of 100% Replacement rate regenerated aggregate concrete of low slump loss - Google Patents
A kind of 100% Replacement rate regenerated aggregate concrete of low slump loss Download PDFInfo
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- CN109020390A CN109020390A CN201811022240.6A CN201811022240A CN109020390A CN 109020390 A CN109020390 A CN 109020390A CN 201811022240 A CN201811022240 A CN 201811022240A CN 109020390 A CN109020390 A CN 109020390A
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- Prior art keywords
- regenerated
- replacement rate
- aggregate
- concrete
- slump loss
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B20/10—Coating or impregnating
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of 100% Replacement rate regenerated aggregate concretes of low slump loss, belong to the recycled concrete field in architectural engineering.It includes that cement, water, flyash, ground granulated blast furnace slag, yellow ground, Gel Treatment regenerated coarse aggregate and high efficiency water reducing agent cooperate according to a certain percentage.Wherein, Gel Treatment solution is formulated according to a certain percentage by calcareous material, siliceous material and water.Compared with traditional regenerated aggregate concrete, the aggregate Replacement rate is larger (100%), has accomplished the effective use of recycled aggregate.And the concrete initial fluidity is preferable, and Slump Time losing of Large is able to satisfy engineer application needs much smaller than general full substitution regenerated aggregate concrete.
Description
Technical field
The invention belongs to the recycled concrete field in architectural engineering, in particular to a kind of low slump loss
100% Replacement rate regenerated aggregate concrete.
Background technique
It is real that recycled aggregate is made by screening, being crushed, after shaping for the production of regeneration concrete for discarded concrete
The important channel of existing discarded concrete effective use.But it is unsatisfactory from the point of view of the utilization power of current recycled aggregate.With regeneration
The usual intensity of regeneration concrete made from aggregate is lower, poor fluidity, Slump Time losing of Large are larger.Itself main reason is that,
The usual grain shape of recycled aggregate is bad, and there are old mortar and the attachment of a large amount of impurity in surface.The old mortar on surface will lead to Regenerated Bone
Expect the remote ultranatural aggregate of water absorption rate, influences the mobility of concrete, and the bad cement slurry that also results in of grain shape can not be fully wrapped around
Recycled aggregate is so as to cause concrete flowability decline.In addition, the lasting water suction of recycled aggregate also causes regeneration concrete to collapse
Spend the remote ultranatural aggregate concrete of gradual loss.The above unfavorable factor causes mixing plant Replacement rate when using recycled aggregate
Lower (usually≤30%), and preparation strength is generally not high (C20~C30).
Summary of the invention
The invention proposes a kind of novel regenerated aggregate concretes.It, should compared with traditional regenerated aggregate concrete
Aggregate Replacement rate is larger (100%), has accomplished the effective use of recycled aggregate.And the concrete initial fluidity compared with
It is good, and Slump Time losing of Large is able to satisfy engineer application needs much smaller than general full substitution regenerated aggregate concrete.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of 100% Replacement rate regenerated aggregate concrete of low slump loss, including cement, water, flyash, granulation are high
Furnace slag powders, yellow ground, Gel Treatment regenerated coarse aggregate and high efficiency water reducing agent cooperate according to a certain percentage.
The beneficial effects of the present invention are:
100% Replacement rate regenerated aggregate concrete of low slump loss of the invention, belonging to has smaller slump warp
When the full substitution regenerated aggregate concrete that loses.It is different from common full substitution regenerated aggregate concrete, the spy that aggregate passes through
Different processing, fine gel particles are effectively filled with the micropore on recycled aggregate surface, reduce the water absorption rate of recycled aggregate.By force
The boundary strength of recycled aggregate and new mortar is changed.And the powder dress particle after gel drying also promotes regenerated aggregate concrete
Mobile performance.
Further, 100% Replacement rate regenerated aggregate concrete of the low slump loss is by cement, water, fine coal
Ash, ground granulated blast furnace slag, yellow ground, Gel Treatment regenerated coarse aggregate and high efficiency water reducing agent composition, match ratio (kg/m3)
Are as follows:
Further, the ground granulated blast furnace slag grade is one of S95, S105, S115.
Further, the yellow ground fineness modulus is 2.3~3.0.
Further, the high efficiency water reducing agent is that polycarboxylic acids is compounded with calcium lignosulfonate, water-reducing rate >=20%.
Further, the Gel Treatment regenerated coarse aggregate impregnates regenerated coarse aggregate by processing solution, and places after taking out
It dries.
Further, the processing solution includes calcareous material, siliceous material and water, wherein calcareous material and siliceous material
Weight ratio be the total weight ratio of 0.3~3:1, the weight of water and calcareous material and siliceous material be 5~30:1.
Further, the processing solution is white gels liquid.
Detailed description of the invention
Fig. 1 is the 100% Replacement rate regenerated aggregate concrete slump of low slump loss in the embodiment of the present invention one
Schematic diagram；
Fig. 2 is 100% Replacement rate regenerated aggregate concrete compression strength of low slump loss in the embodiment of the present invention one
Schematic diagram；
Fig. 3 be the embodiment of the present invention one in low slump loss 100% Replacement rate regenerated aggregate concrete in through handling
The schematic diagram of coarse aggregate afterwards.
Specific embodiment
A kind of 100% Replacement rate regenerated aggregate concrete of low slump loss of the invention, including cement, water, fine coal
Ash, ground granulated blast furnace slag, yellow ground, Gel Treatment regenerated coarse aggregate and high efficiency water reducing agent cooperate according to a certain percentage and
At.Wherein, cement is P.O42.5 ordinary portland cement, and ground granulated blast furnace slag grade includes S95, S105, S115, fine coal
Ash is II flyash for meeting national Specification, and coarse aggregate is to meet as defined in " GB/T25177-2010 " standard 5~25
Diameter regenerated coarse aggregate, the fineness modulus of yellow ground are 2.3~3.0, and high efficiency water reducing agent is to imitate water-reducing agent during polycarboxylic acids is compounded with calcium lignosulfonate,
Water-reducing rate >=20%, water are ordinary tap water.
Wherein, Gel Treatment regenerated coarse aggregate the production method is as follows:
Processing solution includes calcareous material, siliceous material and water, and wherein the weight ratio of calcareous material and siliceous material is 0.3
~3:1, the weight and calcareous material of water and the total weight ratio of siliceous material are 5~30:1；The processing made of aforementioned formula
Solution is white gels liquid；
Then processing solution is impregnated into recycled aggregate, ventilation is placed in after taking-up, is dried at drying, until surface is without obvious water
When mark remains.Obtained Gel Treatment regenerated coarse aggregate is as shown in Figure 3.
Embodiment 1:
Using the concrete match ratio of common recycled aggregate such as shown in table 1-1:
Table 1-1 uses the concrete mix (kg/m of common recycled aggregate3)
| Water | P.O42.5 cement | Flyash | Ground granulated blast furnace slag | Yellow ground | Regenerated coarse aggregate | High efficiency water reducing agent volume |
| 210 | 190 | 70 | 90 | 850 | 1050 | 3.7 |
Working performance and mechanical property using the concrete of common recycled aggregate are measured as shown in table 1-2:
Table 1-2 uses the working performance and mechanical property of common regenerated aggregate concrete
Embodiment 2:
The cooperation of Gel Treatment regenerated aggregate concrete is such as shown in table 2-1:
Table 2-1 Gel Treatment regenerated aggregate concrete match ratio (kg/m3)
| Water | P.O42.5 cement | Flyash | Ground granulated blast furnace slag | Yellow ground | Gel Treatment regenerated coarse aggregate | High efficiency water reducing agent volume |
| 210 | 190 | 70 | 90 | 850 | 1050 | 3.7 |
Unlike the first embodiment: using Gel Treatment regenerated coarse aggregate instead of common regenerated coarse aggregate, Qi Tabu
Suddenly same as Example 1 with parameter.
The working performance and mechanical property for measuring Gel Treatment regenerated aggregate concrete are as shown in table 2-2:
The working performance and mechanical property of table 2-2 Gel Treatment regenerated aggregate concrete
Its slump schematic diagram such as Fig. 1, compression strength schematic diagram such as Fig. 2.
In general, replace natural aggregate preparation regeneration concrete difficulty higher entirely with recycled aggregate, main reason is that
Recycled aggregate water absorption rate is high, even if the slump, workability are preferable when regeneration concrete discharges, but after a period of time, due to again
The lasting water sorption of raw aggregate, can become dry concrete, lose basic workability.In face of this feelings
Condition generallys use the measure that concrete is sent to water supplement behind building site in engineering.But water is added in the regenerated aggregate concrete after stiff
It is easy isolation afterwards, and is easy to the engineering defects such as crack, hole occur after concrete hardening.In addition, ratio of mud rising can also make
Strength of recycled aggregate concrete decline.It is high that the above unfavorable factor results in the full substitution regenerated aggregate concrete difficulty of production.
As it can be seen that the present invention provides a kind of full substitution regenerated aggregate concrete with smaller Slump Time losing of Large.With
Common full substitution regenerated aggregate concrete is compared, 100% Replacement rate regenerated aggregate concrete aggregate of the low slump loss
The specially treated of process, fine gel particles are effectively filled with the micropore on recycled aggregate surface, reduce recycled aggregate
Water absorption rate.Enhance the boundary strength of recycled aggregate and new mortar.And the powder dress particle after gel drying also promotes Regenerated Bone
Expect the mobile performance of concrete.Compared with traditional regenerated aggregate concrete, the aggregate Replacement rate is larger
(100%), the effective use of recycled aggregate has been accomplished.And the concrete initial fluidity is preferable, and Slump Time losing of Large is remote
Less than general full substitution regenerated aggregate concrete, it is able to satisfy engineer application needs.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to scope of the claims.
Claims (8)
1. a kind of 100% Replacement rate regenerated aggregate concrete of low slump loss, it is characterised in that: including cement, water, fine coal
Ash, ground granulated blast furnace slag, yellow ground, Gel Treatment regenerated coarse aggregate and high efficiency water reducing agent cooperate according to a certain percentage and
At.
2. 100% Replacement rate regenerated aggregate concrete of low slump loss according to claim 1, it is characterised in that:
100% Replacement rate regenerated aggregate concrete of the low slump loss be by cement, water, flyash, ground granulated blast furnace slag,
Yellow ground, Gel Treatment regenerated coarse aggregate and high efficiency water reducing agent composition, match ratio (kg/m3) are as follows:
3. 100% Replacement rate regenerated aggregate concrete of low slump loss according to claim 2, it is characterised in that:
The ground granulated blast furnace slag grade is one of S95, S105, S115.
4. 100% Replacement rate regenerated aggregate concrete of low slump loss according to claim 2, it is characterised in that:
The yellow ground fineness modulus is 2.3~3.0.
5. 100% Replacement rate regenerated aggregate concrete of low slump loss according to claim 2, it is characterised in that:
The high efficiency water reducing agent is that polycarboxylic acids is compounded with calcium lignosulfonate, water-reducing rate >=20%.
6. 100% Replacement rate regenerated aggregate concrete of low slump loss according to claim 1, it is characterised in that:
The Gel Treatment regenerated coarse aggregate impregnates regenerated coarse aggregate by processing solution, and is placed to dry after taking out.
7. 100% Replacement rate regenerated aggregate concrete of low slump loss according to claim 6, it is characterised in that:
The processing solution includes calcareous material, siliceous material and water, and wherein the weight ratio of calcareous material and siliceous material is 0.3~3:
1, the weight and calcareous material of water and the total weight ratio of siliceous material are 5~30:1.
8. 100% Replacement rate regenerated aggregate concrete of low slump loss according to claim 6, it is characterised in that:
The processing solution is white gels liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811022240.6A CN109020390A (en) | 2018-09-04 | 2018-09-04 | A kind of 100% Replacement rate regenerated aggregate concrete of low slump loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811022240.6A CN109020390A (en) | 2018-09-04 | 2018-09-04 | A kind of 100% Replacement rate regenerated aggregate concrete of low slump loss |
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| CN109020390A true CN109020390A (en) | 2018-12-18 |
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| CN201811022240.6A Pending CN109020390A (en) | 2018-09-04 | 2018-09-04 | A kind of 100% Replacement rate regenerated aggregate concrete of low slump loss |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110407493A (en) * | 2019-09-03 | 2019-11-05 | 福建省鑫坤建设工程有限公司 | A method of concrete is prepared using building waste |
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| WO2017082747A1 (en) * | 2015-11-13 | 2017-05-18 | Instituto Superior Técnico | High-performance concrete made with no natural aggregates and its preparation |
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Patent Citations (3)
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| WO2017082747A1 (en) * | 2015-11-13 | 2017-05-18 | Instituto Superior Técnico | High-performance concrete made with no natural aggregates and its preparation |
| CN107382114A (en) * | 2017-08-02 | 2017-11-24 | 上海建工集团股份有限公司 | Waste and old concrete regeneration aggregate surface processing device and method |
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Non-Patent Citations (2)
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| 吴勇 等: "聚羧酸高效减水剂与木质素磺酸盐减水剂复配性能研究", 《江西建材》 * |
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| CN110407493A (en) * | 2019-09-03 | 2019-11-05 | 福建省鑫坤建设工程有限公司 | A method of concrete is prepared using building waste |
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Application publication date: 20181218 |