CN110104983A - Application method of the curing agent in concrete in alkaline residue - Google Patents

Application method of the curing agent in concrete in alkaline residue Download PDF

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Publication number
CN110104983A
CN110104983A CN201910304523.8A CN201910304523A CN110104983A CN 110104983 A CN110104983 A CN 110104983A CN 201910304523 A CN201910304523 A CN 201910304523A CN 110104983 A CN110104983 A CN 110104983A
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CN
China
Prior art keywords
alkaline residue
curing agent
concrete
quality
residue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910304523.8A
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Chinese (zh)
Inventor
姚丁语
杨医博
严与珩
张迪
郭文瑛
岳晓东
林浩钜
林钰
张鸿昱
王恒昌
辛展文
韦含辛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
South China University of Technology SCUT
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South China University of Technology SCUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by South China University of Technology SCUT filed Critical South China University of Technology SCUT
Priority to CN201910304523.8A priority Critical patent/CN110104983A/en
Publication of CN110104983A publication Critical patent/CN110104983A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B22/00Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/0006Waste inorganic materials

Abstract

The invention belongs to building material technical fields, and in particular to application method of the curing agent in concrete in a kind of alkaline residue.This method replaces cement using quality such as curing agents in alkaline residue, and the amount ranges of curing agent are the 4%~6% of cementitious material quality in alkaline residue;The water-cement ratio of concrete is in 0.20 to 0.40 range, and the additional water consumption of curing agent increases with water-cement ratio in alkaline residue and linear reduction, range are 0%~40% of curing agent quality in alkaline residue.It adds in alkaline residue after curing agent, the 28d age compression strength of 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, the self-constriction of concrete can be effectively reduced, and can reduce the cost of concrete under the premise of guaranteeing concrete strength.

Description

Application method of the curing agent in concrete in alkaline residue
Technical field
The invention belongs to building material technical fields, and in particular to user of the curing agent in concrete in a kind of alkaline residue Method.
Background technique
Concrete is common construction material, but when its water-cement ratio is lower than 0.42, understands the aquation due to cement and generate Self-constriction phenomenon, and reduced with water-cement ratio, self-constriction increases.The self-constriction of concrete is also to lead to the important original of concrete cracking Cause.
It is the effective way for solving the problems, such as this using interior curing agent, but existing research shows that existing organic interior feeding After protecting agent (such as super absorbent resin) and inorganic interior curing agent (such as haydite) admixture, the same of concrete self-shrinkage is being reduced When, it will usually different degrees of reduction concrete strength is badly in need of the new interior curing agent for not reducing concrete strength of exploitation.
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 concrete.Result of study shows that it can reduce the self-constriction of concrete, but can reduce concrete simultaneously Working performance and 28d compression strength.Therefore, it is badly in need of developing one kind and is able to maintain concrete 28d compression strength and does not reduce and can be effective The method for reducing concrete self-shrinkage.
Summary of the invention
The technical problems to be solved by the present invention are: keeping concrete 28d anti-how using alkaline residue as interior curing agent Compressive Strength do not reduce in the case where, the self-constriction of concrete can be effectively reduced, realization is turned waste into wealth.
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide curing agents in a kind of alkaline residue in concrete Application method.
To achieve the goals above, The technical solution adopted by the invention is as follows:
Application method of the curing agent in concrete in a kind of alkaline residue replaces cement with quality such as curing agents in alkaline residue, adds Enter in concrete, the amount ranges of curing agent are the 4%~6% of cementitious material quality in alkaline residue;The water-cement ratio of concrete exists 0.20~0.40, the additional water consumption of curing agent increases with water-cement ratio in alkaline residue and linear reduction, amount ranges are in alkaline residue The 0%~40% of curing agent quality;
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 flour mill again, chloride ion content is lower than 0.30wt%, and partial size is big It is less than 10wt% in the granule content of 0.080mm.
It is furthermore preferred that the amount ranges of curing agent are the 5% of cementitious material quality in the alkaline residue.
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 concrete does not reduce, and 3d age Self-constriction reduces by 20% or more.
(3) cement is the highest cementitious material of price in concrete, replaces cement with alkaline residue, can effectively reduce cost, can To realize the efficient utilization of curing agent in alkaline residue.
(4) industrial waste alkaline residue can be efficiently used, every cubic meter of concrete can utilize 20 kilograms to 30 kilograms of alkaline residue.With The concrete amount that annual water-cement ratio is 0.20~0.40 is that 1 billion cubic meter calculates, and can consume alkaline residue 200~3,000,000 ton.
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 concrete in a kind of alkaline residue.
Curing agent is prepared using fly cutter flour mill in alkaline residue, chloride ion content 0.20wt%, and partial size is greater than 0.08mm Granule content be 8wt%.Water-binder ratio 0.20, the quality such as curing agent replace cement in alkaline residue, and curing agent is mixed in alkaline residue Amount is the 4.0% of cementitious material quality, and additional water flowing rate is 40% of curing agent quality in alkaline residue;By standard GB/T/T 50081-2002 and GB/T 50082-2009 detection, compared to the blank control group that curing agent in alkaline residue is not added, the 28d of concrete Compression strength, which improves 0.5%, 3d self-constriction, reduces by 31.1%.
Embodiment 2
The present embodiment provides application method of the curing agent in concrete in a kind of alkaline residue.
Curing agent is prepared using mill flour mill in alkaline residue, chloride ion content 0.21wt%, and partial size is greater than 0.08mm Granule content be 5wt%.Water-binder ratio 0.30, the quality such as curing agent replace cement in alkaline residue, and curing agent is mixed in alkaline residue Amount is the 5.0% of cementitious material quality, and additional water flowing rate is 20% of curing agent quality in alkaline residue;By standard GB/T/T 50081-2002 and GB/T 50082-2009 detection, compared to the blank control group that curing agent in alkaline residue is not added, the 28d of concrete Compression strength, which improves 1.2%, 3d self-constriction, reduces by 28.4%.
Embodiment 3
The present embodiment provides application method of the curing agent in concrete in a kind of alkaline residue.
Curing agent is prepared using fly cutter flour mill in alkaline residue, chloride ion content 0.09wt%, and partial size is greater than 0.08mm Granule content be 8wt%.Water-binder ratio 0.40, the quality such as curing agent replace cement in alkaline residue, and curing agent is mixed in alkaline residue Amount is the 6.0% of cementitious material quality, is not spiked with additional water flowing rate;By standard GB/T/T 50081-2002 and GB/T 50082- 2009 detections, compared to the blank control group that curing agent in alkaline residue is not added, the 28d compression strength of concrete improves 2.3%, 3d from receipts Contracting reduces by 38.1%.
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 concrete in a kind of alkaline residue, it is characterised in that: taken with quality such as curing agents in alkaline residue For cement, it is added in concrete, the amount ranges of curing agent are the 4%~6% of cementitious material quality in alkaline residue;The water of concrete The additional water consumption of glue ratio curing agent in 0.20~0.40, alkaline residue increases with water-cement ratio and linear reduction, amount ranges are The 0%~40% 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, then is used in the alkaline residue Interior conserving material obtained by powder is made in fly cutter or mill flour mill, and chloride ion content is lower than 0.30wt%, and partial size is greater than The granule content of 0.080mm is less than 10wt%.
2. application method of the curing agent in concrete in alkaline residue according to claim 1, it is characterised in that: the alkali The amount ranges of curing agent are the 5% of cementitious material quality in slag.
CN201910304523.8A 2019-04-16 2019-04-16 Application method of the curing agent in concrete in alkaline residue Pending CN110104983A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910304523.8A CN110104983A (en) 2019-04-16 2019-04-16 Application method of the curing agent in concrete in alkaline residue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910304523.8A CN110104983A (en) 2019-04-16 2019-04-16 Application method of the curing agent in concrete in alkaline residue

Publications (1)

Publication Number Publication Date
CN110104983A true CN110104983A (en) 2019-08-09

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CN201910304523.8A Pending CN110104983A (en) 2019-04-16 2019-04-16 Application method of the curing agent in concrete in alkaline residue

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111348857A (en) * 2020-03-26 2020-06-30 张延年 Concrete activator and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060144299A1 (en) * 2003-07-04 2006-07-06 Kazunori Takada Method for reducing autogeneous shrinkage of super high strength concrete
CN106186769A (en) * 2016-07-15 2016-12-07 华南理工大学 Preparation method and application are dried in a kind of alkaline residue water-retaining agent and revolution thereof
CN106167362B (en) * 2016-07-15 2019-01-18 华南理工大学 A kind of alkaline residue water-retaining agent and the preparation method and application thereof
CN208727679U (en) * 2018-07-18 2019-04-12 广东聚盈化工有限公司 A kind of efficient blocky paint pulverizer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060144299A1 (en) * 2003-07-04 2006-07-06 Kazunori Takada Method for reducing autogeneous shrinkage of super high strength concrete
CN106186769A (en) * 2016-07-15 2016-12-07 华南理工大学 Preparation method and application are dried in a kind of alkaline residue water-retaining agent and revolution thereof
CN106167362B (en) * 2016-07-15 2019-01-18 华南理工大学 A kind of alkaline residue water-retaining agent and the preparation method and application thereof
CN208727679U (en) * 2018-07-18 2019-04-12 广东聚盈化工有限公司 A kind of efficient blocky paint pulverizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111348857A (en) * 2020-03-26 2020-06-30 张延年 Concrete activator and preparation method thereof

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Application publication date: 20190809