CN110104982A - Application method of the curing agent in ultra-high performance concrete in alkaline residue - Google Patents
Application method of the curing agent in ultra-high performance concrete in alkaline residue Download PDFInfo
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- CN110104982A CN110104982A CN201910304512.XA CN201910304512A CN110104982A CN 110104982 A CN110104982 A CN 110104982A CN 201910304512 A CN201910304512 A CN 201910304512A CN 110104982 A CN110104982 A CN 110104982A
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- Prior art keywords
- alkaline residue
- curing agent
- ultra
- high performance
- performance 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/0006—Waste inorganic materials
Abstract
The invention belongs to building material technical fields, and in particular to application method of the curing agent in ultra-high performance concrete in a kind of alkaline residue.This method replaces the silicon ash in ultra-high performance concrete using quality such as curing agents in alkaline residue, and the amount ranges of curing agent are the 3%~5% of cementitious material quality in alkaline residue, and the quality of the additional water of curing agent is 30%~60% of curing agent quality in alkaline residue in alkaline residue;It adds in alkaline residue after curing agent, the 28d age compression strength of ultra-high performance concrete does not reduce, and the self-constriction of 3d age reduces by 20% or more.The present invention provides a kind of methods for efficiently using alkaline residue, additionally it is possible under the premise of guaranteeing ultra-high performance concrete intensity, the self-constriction of ultra-high performance concrete be effectively reduced, and can reduce the cost of ultra-high performance concrete.
Description
Technical field
The invention belongs to building material technical fields, and in particular to curing agent is in ultra-high performance concrete in a kind of alkaline residue
Application method.
Background technique
Ultra-high performance concrete has superelevation durability and superhigh intensity, and it is in recent years that compression strength, which is more than 100MPa,
The novel concrete sill to grow up, water-cement ratio are usually 0.14 to 0.20, and since water-cement ratio is low, self-constriction is very big,
It easilys lead to crack.
It is the effective way for solving the problems, such as this using interior curing agent, but existing research shows that adds high-hydroscopicity tree
The interior curing agent of rouge can reduce concrete strength while reducing ultra-high performance concrete self-constriction, and it is new not to be badly in need of exploitation
Reduce the interior curing agent of concrete strength.
Alkaline residue is ammonia-soda process soda ash and the waste residue generated.China is currently maximum soda manufacture state in the world, often
The alkaline residue that year generates because producing soda ash is up to 3,000,000 tons, and so a large amount of alkaline residue causes many problem of environmental pollutions.But alkali
Slag chloride ion content is high, and the mass of ion score under absolute dry condition can reach 10%, so that the secondary use of alkaline residue is difficult
It is heavy.Alkaline residue utilization rate in China's only has 3~4% at present, and main processing ways are stockpiling or fill out extra large processing, brings to environment
The problems such as such as " white sea " phenomenon.
Early-stage study finds there is large quantity micropore gap in alkaline residue, and the structure of alkaline residue can carry out water suction and release water, reach
The effect of interior maintenance;Concrete will not be made to generate hole there is a phenomenon where particle atrophy simultaneously, therefore as interior curing agent
It is feasible.
Applicant early period alkaline residue is dechlorinated after, with flyash intergrinding powder, replace slag and powder as interior curing agent
Coal ash is added in ultra-high performance concrete.Result of study shows that it can reduce the self-constriction of ultra-high performance concrete, but same
When can reduce the working performance and 28d compression strength of concrete.Therefore, being badly in need of exploitation a kind of can keep ultra-high performance concrete
The method that 28d compression strength does not reduce and ultra-high performance concrete self-constriction can be effectively reduced.
Summary of the invention
The technical problems to be solved by the present invention are: keeping very-high performance mixed how using alkaline residue as interior curing agent
Coagulate soil 28d compression strength do not reduce in the case where, the self-constriction of ultra-high performance concrete can be effectively reduced, realize become give up into
It is precious.
In order to solve the above-mentioned technical problem, it is mixed in very-high performance that the purpose of the present invention is to provide curing agents in a kind of alkaline residue
Application method in solidifying soil.
To achieve the goals above, The technical solution adopted by the invention is as follows:
Application method of the curing agent in ultra-high performance concrete in a kind of alkaline residue is replaced with quality such as curing agents in alkaline residue
Silicon ash is added in ultra-high performance concrete, and the amount ranges of curing agent are the 3%~5% of cementitious material quality, alkaline residue in alkaline residue
The quality of the additional water of interior curing agent is 30%~60% of curing agent quality in alkaline residue;
Curing agent is that the waste residue alkaline residue of ammonia-soda process soda ash is successively dechlorinated, breaks up and dried in the alkaline residue,
Interior conserving material obtained by powder is made with fly cutter or mill again, chloride ion content is lower than 0.30wt%, and partial size is greater than
The granule content of 0.080mm is less than 10wt%.
Preferably, the water-cement ratio range of the ultra-high performance concrete is 0.14~0.20, and compression strength is greater than
100MPa。
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) in the alkaline residue that uses of the present invention curing agent be by alkaline residue successively by dechlorination, break up and dry, then with fly cutter or
Interior conserving material obtained by powder is made in mill, and particle is thinner, and without mixing material is added, interior maintenance effect is good,
There are positive influences to intensity.
(2) it adding in alkaline residue after curing agent as required, the 28d age compression strength of ultra-high performance concrete does not reduce, and
The self-constriction of 3d age reduces by 20% or more.
(3) silicon ash is most thin, the highest admixture of price in ultra-high performance concrete, replaces silicon ash with alkaline residue, can reduce
Water-reducing agent dosage can effectively reduce cost, and the efficient utilization of curing agent in alkaline residue may be implemented.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, embodiments of the present invention are not limited thereto.
For not specifically specified technological parameter, routine techniques progress can refer to.
Embodiment 1
The present embodiment provides application method of the curing agent in ultra-high performance concrete in a kind of alkaline residue.
Curing agent is prepared using fly cutter flour mill in alkaline residue, chloride ion content 0.24wt%, and partial size is greater than 0.080mm
Granule content be 8wt%.Ultra-high performance concrete water-cement ratio 0.18, curing agent volume is cementitious material quality in alkaline residue
4.0%, etc. quality replace silicon ash, additional water flowing rate be alkaline residue in curing agent quality 50%;By standard GB/T/T 31387-
2015 and GB/T 50082-2009 detection, compared to the blank control group that curing agent in alkaline residue is not added, ultra-high performance concrete
28d compression strength, which improves 1.0%, 3d self-constriction, reduces by 36.3%.
Embodiment 2
The present embodiment provides application method of the curing agent in ultra-high performance concrete in a kind of alkaline residue.
Curing agent is prepared using mill flour mill in alkaline residue, chloride ion content 0.20wt%, and partial size is greater than 0.080mm
Granule content be 6wt%.Ultra-high performance concrete water-cement ratio 0.14, curing agent volume is cementitious material quality in alkaline residue
3.0%, etc. quality replace silicon ash, additional water flowing rate be alkaline residue in curing agent quality 60%;By standard GB/T/T 31387-
2015 and GB/T 50082-2009 detection, compared to the blank control group that curing agent in alkaline residue is not added, the 28d pressure resistance of concrete
Degree, which improves 0.5%, 3d self-constriction, reduces by 24.1%.
Embodiment 3
The present embodiment provides application method of the curing agent in ultra-high performance concrete in a kind of alkaline residue.
Curing agent is prepared using fly cutter flour mill in alkaline residue, chloride ion content 0.05wt%, and partial size is greater than 0.080mm
Granule content be 9wt%.Ultra-high performance concrete water-cement ratio 0.20, curing agent volume is cementitious material quality in alkaline residue
5.0%, etc. quality replace silicon ash, additional water flowing rate be alkaline residue in curing agent quality 30%;By standard GB/T/T 31387-
2015 and GB/T 50082-2009 detection, compared to the blank control group that curing agent in alkaline residue is not added, the 28d pressure resistance of concrete
Degree, which improves 0.3%, 3d self-constriction, reduces by 35.5%.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by the embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by change, modification, substitution, combination and simplify,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (2)
1. application method of the curing agent in ultra-high performance concrete in a kind of alkaline residue, it is characterised in that: with curing agent in alkaline residue
Etc. quality replace silicon ash, be added ultra-high performance concrete in, the amount ranges of curing agent are the 3% of cementitious material quality in alkaline residue
~5%, the quality of the additional water of curing agent is 30%~60% of curing agent quality in alkaline residue in alkaline residue;
Curing agent is that the waste residue alkaline residue of ammonia-soda process soda ash is successively dechlorinated, breaks up and dried, then is used in the alkaline residue
Interior conserving material obtained by powder is made in fly cutter or mill, and chloride ion content is lower than 0.30wt%, and partial size is greater than 0.080mm's
Granule content is less than 10wt%.
2. application method of the curing agent in ultra-high performance concrete in alkaline residue according to claim 1, it is characterised in that:
The water-cement ratio range of the ultra-high performance concrete is 0.14~0.20, and compression strength is greater than 100MPa.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115490448A (en) * | 2021-06-17 | 2022-12-20 | 华南理工大学 | Method for reducing self-shrinkage of ultrahigh-performance concrete, high-strength concrete and high-strength mortar |
Citations (2)
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CN105693124A (en) * | 2016-01-20 | 2016-06-22 | 山东大学 | Preparation method and application method of fine reclaimed aggregate for concrete internal curing |
CN106167362A (en) * | 2016-07-15 | 2016-11-30 | 华南理工大学 | A kind of alkaline residue water-retaining agent and preparation method and application |
-
2019
- 2019-04-16 CN CN201910304512.XA patent/CN110104982A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105693124A (en) * | 2016-01-20 | 2016-06-22 | 山东大学 | Preparation method and application method of fine reclaimed aggregate for concrete internal curing |
CN106167362A (en) * | 2016-07-15 | 2016-11-30 | 华南理工大学 | A kind of alkaline residue water-retaining agent and preparation method and application |
Non-Patent Citations (1)
Title |
---|
普永强: "除氯碱渣用作内养护材料对混凝土性能影响及其机理研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115490448A (en) * | 2021-06-17 | 2022-12-20 | 华南理工大学 | Method for reducing self-shrinkage of ultrahigh-performance concrete, high-strength concrete and high-strength mortar |
CN115490448B (en) * | 2021-06-17 | 2023-07-18 | 华南理工大学 | Method for reducing self-shrinkage of ultra-high-performance concrete, high-strength concrete and high-strength mortar |
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Application publication date: 20190809 |
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