CN107162458B - A kind of super-retarder extending concrete coagulating time and its application method - Google Patents
A kind of super-retarder extending concrete coagulating time and its application method Download PDFInfo
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- CN107162458B CN107162458B CN201710398105.0A CN201710398105A CN107162458B CN 107162458 B CN107162458 B CN 107162458B CN 201710398105 A CN201710398105 A CN 201710398105A CN 107162458 B CN107162458 B CN 107162458B
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- Prior art keywords
- water
- retarder
- super
- slow setting
- setting component
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
Abstract
The invention discloses super-retarders and its application method that one kind can extend concrete coagulating time, it is compounded by slow setting component, water-reducing agent component and water, slow setting component accounts for the 2.0-4.0wt% of gross weight, and water-reducing agent component accounts for the 30-85wt% of gross weight, and surplus is water；The slow setting component is formed by one of the waste liquid generated during sugar refinery production sodium gluconate and aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid, four sodium of aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid sodium, 1-hydroxy ethylidene-1,1-diphosphonic acid potassium or multiple combinations, and it is 30-70wt% that waste liquid, which accounts for the ratio of slow setting component,.Super-retarder of the invention substantially prolongs the setting time of concrete, flowing degree of net paste of cement gradual loss is obviously reduced after incorporation, it is obviously reduced when retarder is not added in slump-loss ratio within the long period, the appearance of temperature peak of hydration is postponed, temperature peak of hydration value is reduced, and intensity also has increase；With additive compatibility it is good, improve the quality stability of concrete product, greatly reduce cost.
Description
Technical field
The present invention relates to super-retarders and its application method that one kind can extend concrete coagulating time, belong to concrete
Preparation field.
Background technique
Retarder is a kind of common concrete admixture, and the condensation of cement can be delayed to harden, and postpones temperature peak of hydration and goes out
The existing time reduces temperature peak of hydration value, prevents mass concrete from thermal cracking occur；Further by adjusting high efficiency water reducing agent
With the adaptability of cement, concrete mix slump-loss is reduced, the fresh concrete long period is made to keep plasticity, in favor of
The transport of concrete is poured and is vibrated, and improves construction efficiency.Therefore, retarder is largely used in mass concrete, pumping
Construction and certain special construction technologies under concrete, hot climate.Currently, common retarder be broadly divided into organic and
Inorganic.Organic mainly include hydroxycarboxylic acid and its salt, carbohydrate and carbohydrate, lignosulfonates, polyalcohol and its
Derivative etc.；Inorganic mainly includes phosphate, borax etc., but uses the setting time of these retarder concrete general only
At more than ten hour, and the compatibility of these retarder and other additives was bad, is difficult to ensure uniform mixing；In addition, slow
Solidifying agent higher cost, improves production cost.
Summary of the invention
In view of the above-mentioned problems of the prior art, when can extend concrete coagulation the object of the present invention is to provide one kind
Between, reduce concrete mix slump-loss, with additive compatibility it is good, promoted concrete product quality stability, can
To substantially reduce the concrete ultra-retarding agent and its application method of cost.
To achieve the above object, the technical solution adopted by the present invention is that: one kind can extend the super slow of concrete coagulating time
Solidifying agent, is compounded, slow setting component accounts for the 2.0-4.0wt% of gross weight, water-reducing agent group by slow setting component, water-reducing agent component and water
Divide the 30-85wt% for accounting for gross weight, surplus is water；The waste liquid that the slow setting component is generated in the process by sugar refinery production sodium gluconate
With aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid, four sodium of aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid sodium, hydroxy ethylidene
One of di 2 ethylhexyl phosphonic acid potassium or multiple combinations form, and it is 30-70wt% that waste liquid, which accounts for the ratio of slow setting component,；The water-reducing agent group
It is divided into aliphatic water reducing agent or polycarboxylate water-reducer.
Preferably, it is 30-50wt% that the waste liquid, which accounts for the ratio of slow setting component,.
Preferably, the gluconic acid sodium content in the waste liquid is more than or equal to 35wt%, and solid content is more than or equal to 50wt%.
The present invention also provides the application methods that one kind can extend the super-retarder of concrete coagulating time, including walk as follows
It is rapid:
Step 1: the waste liquid and aminotrimethylenephosphonic acid, hydroxy ethylidene that will be generated during sugar refinery production sodium gluconate
One of di 2 ethylhexyl phosphonic acid, four sodium of aminotrimethylenephosphonic acid, 1-hydroxy ethylidene-1,1-diphosphonic acid sodium, 1-hydroxy ethylidene-1,1-diphosphonic acid potassium or a variety of mixing
At slow setting component, the ratio that waste liquid accounts for slow setting component is 30-70wt%；
Step 2: the slow setting component of step 1 is mixed with water-reducing agent, water and compounds to form super-retarder, slow setting component accounts for super
The 2.0-4.0wt% of retarder gross weight, water-reducing agent account for the 30-85wt% of super-retarder gross weight, and surplus is water；
Step 3: the super-retarder of step 2 is added in concrete, volume 1.5-2.0wt% is uniformly mixed.
In above scheme, water-reducing agent is polycarboxylate water-reducer.
In above scheme, it is preferred that slow setting component accounts for the 4.0wt% of super-retarder gross weight, polycarboxylic acids in the step 2
Water-reducing agent component accounts for the 30wt% of super-retarder gross weight.
Compared with prior art, present invention has the advantage that
(1) super-retarder of the invention substantially prolongs the setting time of concrete, has postponed the appearance of temperature peak of hydration, drop
Low temperature peak of hydration value；Flowing degree of net paste of cement gradual loss is obviously reduced after incorporation, after extended periods slump-loss ratio
It is obviously reduced when retarder is not added, and concrete strength also has increase.When the ratio that waste liquid accounts for slow setting component is 30wt%-
50wt%, when being used in compounding with water-reducing agent to flowing degree of net paste of cement gradual loss, concrete slump gradual loss, condensation
Between and intensity function and effect than waste liquid account for slow setting component ratio be 70wt% when effect it is more preferable.Especially and polycarboxylic acids
(slow setting component volume 4.0wt%) setting time can reach 72 hours when water-reducing agent is used in compounding.
(2) compatibility of super-retarder and water-reducing agent of the present invention is good, and solution is uniform, show with additive compatibility it is good,
Improve the quality stability of concrete product.
(3) present invention makees raw material using the waste liquid generated during sugar refinery production sodium gluconate, greatly reduces cost,
It transports, is easy to use, being not necessarily to Manual material feeding, it can be achieved that automation dispensing waste liquid, has saved labour, reduced labor intensity, mentioned
High production efficiency, improves the competitiveness of product in market.
Specific embodiment
Below with reference to embodiment, invention is further described in detail.
The slow setting component of different ratio is designed first, and is mixed with water-reducing agent, water and be re-dubbed super-retarder sample.Water-reducing agent
Using the aliphatic high-efficiency water reducing agent of Xuzhou Zhu Jian building materials Science and Technology Ltd. production, polycarboxylate water-reducer；Glucose in waste liquid
Sour sodium content is 35wt%, solid content 50wt%.Super-retarder sample specifically matches as shown in table 1:
Table 1
Observe each super-retarder solution example being configured to, waste liquid account for respectively slow setting component ratio be 30wt%,
It is all visible respectively by the volume compounding aliphatic and polycarboxylate water-reducer of 0,2.0wt% and 4.0wt% when 50wt%, 70wt%
Sample solution is uniform, not stratified, illustrates that retarder is good with water reducer compatibility.
Each super-retarder sample is added respectively and is entered in concrete, its shadow to concrete of specific data characterization is passed through
It rings.
(1) influence of the super-retarder incorporation to flowing degree of net paste of cement and gradual loss is as shown in table 2:
Table 2
After super-retarder is added, 60 minutes and 120 minutes flowing degree of net paste of cement gradual loss are obviously reduced, and waste liquid
Holding effect when the ratio for accounting for slow setting component is 30wt% and 50wt% than 70wt% is good.
(2) influence of the super-retarder incorporation to concrete slump loss is as shown in table 3:
Table 3
As it can be seen that concrete 120 minutes and 180 minutes after super-retarder slump-loss ratios, which are added, is not added retarder in table
When be obviously reduced, and when waste liquid account for slow setting component ratio be 30wt% or 50wt% and with polycarboxylic acids water reducing agent compositional use
When (4.0wt% that slow setting component accounts for super-retarder), i.e., when concrete test number is S-12, S-13,180 minutes slump damages
It loses very small.
(3) influence of the super-retarder incorporation to concrete coagulating time is as shown in table 4:
Table 4
As seen from Table 4, the setting time of concrete is obviously prolonged than blank sample after addition super-retarder, when waste liquid accounts for slow setting
The ratio of component is 30wt% or 50wt% and compounds volume in 4.0wt% with aliphatic water reducing agent, i.e., concrete test is compiled
Number be S-5, S-6 when, final setting time can reach more than 53 hours；When waste liquid account for slow setting component ratio be 30wt% or
50wt% and with polycarboxylic acids water reducing agent compositional volume in 4.0wt%, i.e. concrete test number final set when being S-12, S-13
Time can reach 72 hours, and when the ratio that waste liquid accounts for slow setting component is 70wt%, final setting time can be shorter, is 69 small
When.
(4) influence of the super-retarder incorporation to concrete strength (C30) is as shown in table 5:
Table 5
As seen from Table 5, concrete sample 7 days and 28 days concrete crushing strengths after super-retarder is added compare blank sample
All it is significantly improved.
Claims (4)
1. the super-retarder that one kind can extend concrete coagulating time, which is characterized in that its by slow setting component, water-reducing agent component and
Water compounds, and slow setting component accounts for the 2.0-4.0wt% of gross weight, and water-reducing agent component accounts for the 30-85wt% of gross weight, and surplus is water；Institute
Slow setting component is stated by the waste liquid and aminotrimethylenephosphonic acid, 1-hydroxy ethylene-1,1-diphosphonic of generation during sugar refinery production sodium gluconate
Acid, 1-hydroxy ethylidene-1,1-diphosphonic acid sodium are composed, and it is 30-70wt% that waste liquid, which accounts for the ratio of slow setting component,；The water-reducing agent group is divided into
Aliphatic water reducing agent or polycarboxylate water-reducer, the gluconic acid sodium content in the waste liquid are more than or equal to 35wt%, and solid content is greater than
Equal to 50wt%.
2. the super-retarder that one kind according to claim 1 can extend concrete coagulating time, which is characterized in that described useless
The ratio that liquid accounts for slow setting component is 30-50wt%.
3. the application method that one kind can extend the super-retarder of concrete coagulating time, which comprises the steps of:
Step 1: the waste liquid and aminotrimethylenephosphonic acid, 1-hydroxy ethylene-1,1-diphosphonic that will be generated during sugar refinery production sodium gluconate
Acid, 1-hydroxy ethylidene-1,1-diphosphonic acid sodium are mixed into slow setting component, and waste liquid accounts for the ratio of slow setting component for 30-70wt%, in the waste liquid
Gluconic acid sodium content is more than or equal to 35wt%, and solid content is more than or equal to 50wt%；
Step 2: the slow setting component of step 1 is mixed with water-reducing agent, water and compounds to form super-retarder, slow setting component accounts for extra retarded set
The 2.0-4.0wt% of agent gross weight, water-reducing agent account for the 30-85wt% of super-retarder gross weight, and surplus is water, and water-reducing agent is polycarboxylic acids diminishing
Agent；
Step 3: the super-retarder of step 2 is added in concrete, volume 1.5-2.0wt% is uniformly mixed.
4. one kind according to claim 3 can extend the application method of the super-retarder of concrete coagulating time, feature
It is, slow setting component accounts for the 4.0wt% of super-retarder gross weight in the step 2, and it is total that polycarboxylate water-reducer component accounts for super-retarder
The 30wt% of weight.
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Families Citing this family (10)
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| CN108424026B (en) * | 2018-05-10 | 2020-11-06 | 宁夏新华轩高新技术有限公司 | Polycarboxylic acid pumping agent and preparation method thereof |
| CN108585612A (en) * | 2018-05-18 | 2018-09-28 | 萧县沃德化工科技有限公司 | A kind of wet mixing mortar additive and its application |
| CN108821626A (en) * | 2018-09-20 | 2018-11-16 | 佛山市蓝瑞欧特信息服务有限公司 | The cement of slow setting is carried out by additive |
| CN109336452A (en) * | 2018-11-20 | 2019-02-15 | 福建建工建材科技开发有限公司 | A kind of surface retarders for concrete prefabricated element |
| CN111960718A (en) * | 2020-07-22 | 2020-11-20 | 浙江五龙新材股份有限公司 | Super-retarding efficient pumping aid and application thereof |
| CN112500023A (en) * | 2020-11-30 | 2021-03-16 | 亚泰集团长春建材有限公司 | Retarding concrete admixture and preparation method thereof |
| CN112521041B (en) * | 2020-12-07 | 2022-05-24 | 广东红墙新材料股份有限公司 | Small-molecule concrete retarder and preparation method thereof |
| CN113121149B (en) * | 2021-03-01 | 2022-09-16 | 交通运输部公路科学研究所 | Cement-based hydration heat inhibitor and preparation method of cement hydration heat inhibiting concrete |
| CN113511864A (en) * | 2021-07-12 | 2021-10-19 | 泉州三方建材有限公司 | Concrete |
| CN114163160B (en) * | 2021-11-24 | 2022-12-16 | 广东浪淘砂新型材料有限公司 | Activity retention agent for waste car washing slurry of mixing plant, and preparation method and application thereof |
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| JP2012036028A (en) * | 2010-08-04 | 2012-02-23 | Denki Kagaku Kogyo Kk | Spraying material and spraying method using the same |
| KR101363896B1 (en) * | 2012-08-20 | 2014-02-19 | 아주산업 주식회사 | Accelerate dry concrete mix composition |
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Effective date of registration: 20210423 Address after: 221000 Dahuang mountain village, Dahuang mountain, Xuzhou economic and Technological Development Zone, Jiangsu Province, No. 16 Patentee after: XUZHOU NATIONAL ECONOMIC DEVELOPMENT ZONE CHENGYI COMMERCIAL CONCRETE Co.,Ltd. Address before: 221000 17 Dahuangshan village, Dahuangshan Town, Gulou economic and Technological Development Zone, Xuzhou City, Jiangsu Province Patentee before: XUZHOU ZHUJIAN BUILDING MATERIALS TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20191122 Termination date: 20210531 |