CN112851189A - Concrete admixture and preparation method and application thereof - Google Patents
Concrete admixture and preparation method and application thereof Download PDFInfo
- Publication number
- CN112851189A CN112851189A CN202110246539.5A CN202110246539A CN112851189A CN 112851189 A CN112851189 A CN 112851189A CN 202110246539 A CN202110246539 A CN 202110246539A CN 112851189 A CN112851189 A CN 112851189A
- Authority
- CN
- China
- Prior art keywords
- concrete
- parts
- concrete admixture
- water
- admixture
- 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
Links
Classifications
-
- 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
- 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of concrete materials, and particularly discloses a concrete admixture and a preparation method and application thereof. The concrete admixture comprises the following components in parts by weight: 10-20 parts of water reducing agent, 0.1-0.4 part of epsilon-polylysine hydrochloride, 0.1-0.5 part of sodium starch octenyl succinate, 0.4-0.6 part of glycerol, 1-3 parts of modified sorbitol and 80-85 parts of water. The concrete admixture can be used as an admixture for ready-mixed concrete and special concrete. The concrete admixture provided by the invention is applied to the condition of high-temperature powder materials, avoids the rapid setting or false setting phenomenon of concrete, ensures the normal setting time of the concrete and small time loss of the concrete, also ensures the mechanical property and the durability of the hardened concrete, and has extremely high application and popularization values.
Description
Technical Field
The invention relates to the technical field of concrete materials, in particular to a concrete admixture and a preparation method and application thereof.
Background
The concrete is the most important building material in the building industry, and has the advantages of rich raw materials, low price, advanced process, high strength, good durability, small deformation performance and the like. Ready-mixed concrete is concrete produced at a mixing plant, transported to the point of use by means of a transport device and delivered as a mixture. The concrete raw materials can generate chemical reaction along with the time lapse after being mixed and stirred in water, and the adverse effects can be generated on the workability of the concrete, the compatibility of additives and other raw materials, the workability and the like, so that the premixed concrete needs to be conveyed to a required construction site within a specified time, and simultaneously, higher requirements are provided for the performance of the concrete. In addition, because the active powder material in the concrete can generate higher temperature in the process of calcining or grinding (cement or mineral admixture), the powder is not precipitated and can be used after leaving a factory, the active powder material is directly mixed and stirred with other raw materials in the concrete in the presence of water, the premixed concrete can generate the phenomenon of rapid solidification or pseudo-solidification due to overhigh temperature in the process of transportation or construction, the concrete loss is overlarge with time, and concrete and engineering quality accidents are easy to occur.
Disclosure of Invention
Aiming at the problems in the existing concrete construction process, the invention provides a concrete admixture and a preparation method and application thereof, and the concrete admixture is applied to the condition of high-temperature powder materials to avoid the rapid setting or false setting phenomenon of concrete, ensure the normal setting time of the concrete and the small time loss of the concrete, and simultaneously ensure the mechanical property and the durability of the hardened concrete.
In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:
a concrete admixture comprises the following components in parts by weight: 10-20 parts of water reducing agent, 0.1-0.4 part of epsilon-polylysine hydrochloride, 0.1-0.5 part of sodium starch octenyl succinate, 0.4-0.6 part of glycerol, 1-3 parts of modified sorbitol and 80-85 parts of water.
Compared with the prior art, the concrete admixture provided by the invention has the advantages that the hydration speed of the active cementing material can be delayed by adding a specific amount of epsilon-polylysine hydrochloride, sodium starch octenyl succinate, glycerol, modified sorbitol and a water reducing agent for compounding, so that the compatibility of the concrete admixture and other raw materials is improved, the phenomenon of rapid setting or pseudo setting of concrete when the high-temperature (80-90 ℃) powder cementing material is hydrated is avoided, the long-distance transportation of the ready-mixed concrete is ensured, and the workability of the concrete is improved. Meanwhile, the concrete admixture provided by the invention can obviously reduce the time loss value of concrete in a high-temperature environment, when the temperature of a high-temperature powder material or the environment is below 60 ℃, the time loss of the concrete is zero, the long-time high-quality state of the concrete is ensured, the construction performance, the thixotropic property and the rheological property of the concrete are improved, the phenomena of quick setting and pseudo setting caused by overhigh temperature of the powder material entering a factory in the production process of the concrete are solved, and the concrete admixture is suitable for concrete with various pumping construction requirements and premixed concrete with various pouring modes. The concrete admixture provided by the invention is applied to the condition of high-temperature powder materials, avoids the phenomenon of rapid setting or pseudo setting of concrete, ensures the normal setting time of the concrete and small time loss of the concrete, and simultaneously ensures the mechanical property and the durability of the hardened concrete, thereby having extremely high application and popularization values.
Preferably, the composition comprises the following components in parts by weight: 15 parts of water reducing agent, 0.2 part of epsilon-polylysine hydrochloride, 0.3 part of octenyl succinic acid starch sodium, 0.5 part of glycerol, 2 parts of modified sorbitol and 82 parts of water.
The limitation of the content of each component of the preferable concrete admixture can further improve the comprehensive use performance of the concrete and further reduce the loss value of the concrete due to high temperature.
Preferably, the water reducing agent is a polycarboxylate water reducing agent, and BASF (BASF) polycarboxylate water reducing agent RHEOPLUS 411 of Kyowa Kay chemical Co., Ltd can be selected.
Preferably, the modified sorbitol is modified sorbitol containing alkenyl and sulfonic groups; the structural formula of the modified sorbitol containing alkenyl and sulfonic group is as follows:
the preferable modified sorbitol containing alkenyl and sulfonic group can further relieve the rapid setting or pseudo setting phenomenon of the concrete under the high temperature condition, so that the time loss value of the concrete under the high temperature condition of 80-90 ℃ is less than 5 mm.
Preferably, the preparation method of the modified sorbitol containing alkenyl and sulfonic acid groups comprises the following steps: adding glucose and sodium bisulfite into water to react to generate a reaction solution containing sorbitol sulfonate; adding alumina into the reaction solution, and reacting at the temperature of 150-160 ℃ to obtain the modified sorbitol containing alkenyl and sulfonic groups. The water is added in an amount to provide glucose and NaHSO3Can be completely dissolved; the Al is2O3The mass ratio of the glucose to the glucose is 1: 0.2-0.5; the alumina is used as a catalyst, and under the conditions of 150-160 ℃ and the existence of the alumina, the sorbitol sulfonate undergoes elimination reaction to generate the modified sorbitol containing alkenyl and sulfonic groups.
Preferably, the molar ratio of the glucose to the sodium bisulfite is 1: 1-1.2.
The invention also provides a preparation method of the concrete admixture. The preparation method at least comprises the following steps: and adding the epsilon-polylysine hydrochloride, sodium starch octenyl succinate, glycerol and modified sorbitol into water, uniformly mixing, and adding the water reducing agent to obtain the concrete admixture.
Compared with the prior art, the preparation method of the concrete admixture provided by the invention is simple to operate, low in preparation cost, free of investment in special equipment and suitable for popularization and application.
The invention also provides the ready-mixed concrete which comprises the concrete admixture.
Preferably, the ready-mixed concrete comprises the following components in parts by weight: 20-30 parts of cement, 8-10 parts of fly ash, 180 parts of aggregate, 0.8-1 part of concrete admixture and 10-15 parts of water.
The concrete admixture is added into the premixed concrete and applied to the concrete, so that the using amount of a single-component concrete cementing material (cement) can be effectively reduced, the phenomenon of quick setting or false setting of the premixed concrete is avoided, the setting time of the premixed concrete is prolonged, the construction performance of the premixed concrete is effectively improved, and the cost of the single-component concrete is reduced by 10-40 yuan.
The invention also provides concrete which is obtained by solidifying and hardening the premixed concrete.
The concrete provided by the invention has higher strength and durability and higher comprehensive use performance.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A concrete admixture comprises the following components in parts by weight: 10 parts of polycarboxylic acid water reducing agent, 0.1 part of epsilon-polylysine hydrochloride, 0.1 part of starch sodium octenyl succinate, 0.4 part of glycerol, 1 part of modified sorbitol containing alkenyl and sulfonic groups and 80 parts of water.
Wherein the polycarboxylate superplasticizer is BASF (BASF) polycarboxylate superplasticizer RHEOPLUS 411 of Kyong chemical Co., Ltd;
the preparation method of the modified sorbitol containing alkenyl and sulfonic groups comprises the following steps: adding glucose and sodium bisulfite into waterCarrying out reaction to generate a reaction solution containing sorbitol sulfonate; adding alumina into the reaction solution, and reacting at 150 ℃ to obtain the modified sorbitol containing alkenyl and sulfonic groups. The water is added in an amount to provide glucose and NaHSO3Can be completely dissolved, the Al2O3The mass ratio of the glucose to the glucose is 1: 0.2.
The ready-mixed concrete containing the concrete admixture comprises the following components in parts by weight: 20 parts of cement, 8 parts of fly ash, 150 parts of aggregate, 0.8 part of concrete admixture and 10 parts of water. Wherein the aggregate is river sand.
After the ready-mixed concrete was hardened, the concrete was tested for its properties, and the test results are shown in table 1.
Example 2
A concrete admixture comprises the following components in parts by weight: 20 parts of polycarboxylic acid water reducing agent, 0.4 part of epsilon-polylysine hydrochloride, 0.5 part of starch sodium octenyl succinate, 0.6 part of glycerol, 3 parts of modified sorbitol containing alkenyl and sulfonic groups and 85 parts of water.
Wherein the polycarboxylate superplasticizer is BASF (BASF) polycarboxylate superplasticizer RHEOPLUS 411 of Kyong chemical Co., Ltd;
the preparation method of the modified sorbitol containing alkenyl and sulfonic groups comprises the following steps: adding glucose and sodium bisulfite into water to react to generate a reaction solution containing sorbitol sulfonate; adding alumina into the reaction solution, and reacting at 160 ℃ to obtain the modified sorbitol containing alkenyl and sulfonic groups. The water is added in an amount to provide glucose and NaHSO3Can be completely dissolved, the Al2O3The mass ratio of the glucose to the glucose is 1: 0.5.
The ready-mixed concrete containing the concrete admixture comprises the following components in parts by weight: 30 parts of cement, 10 parts of fly ash, 180 parts of aggregate, 1 part of concrete admixture and 15 parts of water. Wherein the aggregate is river sand.
After the ready-mixed concrete was hardened, the concrete was tested for its properties, and the test results are shown in table 1.
Example 3
A concrete admixture comprises the following components in parts by weight: 15 parts of polycarboxylic acid water reducing agent, 0.2 part of epsilon-polylysine hydrochloride, 0.3 part of starch sodium octenyl succinate, 0.5 part of glycerol, 2 parts of modified sorbitol containing alkenyl and sulfonic groups and 82 parts of water.
Wherein the polycarboxylate superplasticizer is BASF (BASF) polycarboxylate superplasticizer RHEOPLUS 411 of Kyong chemical Co., Ltd;
the preparation method of the modified sorbitol containing alkenyl and sulfonic groups comprises the following steps: adding glucose and sodium bisulfite into water to react to generate a reaction solution containing sorbitol sulfonate; adding alumina into the reaction solution, and reacting at 155 ℃ to obtain the modified sorbitol containing alkenyl and sulfonic groups. The water is added in an amount to provide glucose and NaHSO3Can be completely dissolved, the Al2O3The mass ratio of the glucose to the glucose is 1: 0.3.
The ready-mixed concrete containing the concrete admixture comprises the following components in parts by weight: 25 parts of cement, 9 parts of fly ash, 160 parts of aggregate, 0.9 part of concrete admixture and 12 parts of water. Wherein the aggregate is river sand.
After the ready-mixed concrete was hardened, the concrete was tested for its properties, and the test results are shown in table 1.
Comparative example 1
The same amount of sodium gluconate was used instead of the sodium starch octenylsuccinate in example 1 and the other raw materials and preparation methods were the same as in example 1 to obtain a concrete admixture, ready-mixed concrete and concrete. The performance of the concrete was measured, and the results are shown in table 1.
Comparative example 2
The same amount of sorbitol was used in place of the modified sorbitol in example 1, and other raw materials and preparation methods were the same as in example 1, to obtain a concrete admixture, ready-mixed concrete and concrete. The performance of the concrete was measured, and the results are shown in table 1.
TABLE 1 Properties of the concretes
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A concrete admixture is characterized in that: the paint comprises the following components in parts by weight: 10-20 parts of water reducing agent, 0.1-0.4 part of epsilon-polylysine hydrochloride, 0.1-0.5 part of sodium starch octenyl succinate, 0.4-0.6 part of glycerol, 1-3 parts of modified sorbitol and 80-85 parts of water.
2. The concrete admixture according to claim 1, wherein: the paint comprises the following components in parts by weight: 15 parts of water reducing agent, 0.2 part of epsilon-polylysine hydrochloride, 0.3 part of octenyl succinic acid starch sodium, 0.5 part of glycerol, 2 parts of modified sorbitol and 82 parts of water.
3. The concrete admixture according to claim 1 or 2, wherein: the water reducing agent is a polycarboxylic acid water reducing agent.
4. The concrete admixture according to claim 1 or 2, wherein: the modified sorbitol is modified sorbitol containing alkenyl and sulfonic groups, and the structural formula of the modified sorbitol containing alkenyl and sulfonic groups is as follows:
5. the concrete admixture according to claim 1 or 2, wherein: the preparation method of the modified sorbitol containing alkenyl and sulfonic groups comprises the following steps: adding glucose and sodium bisulfite into water to react to generate a reaction solution containing sorbitol sulfonate; adding alumina into the reaction solution, and reacting at the temperature of 150-160 ℃ to obtain the modified sorbitol containing alkenyl and sulfonic groups.
6. The concrete admixture according to claim 5, wherein: the molar ratio of the glucose to the sodium bisulfite is 1: 1-1.2.
7. The method for producing a concrete admixture according to any one of claims 1 to 6, characterized by comprising: and adding the epsilon-polylysine hydrochloride, sodium starch octenyl succinate, glycerol and modified sorbitol into water, uniformly mixing, and adding the water reducing agent to obtain the concrete admixture.
8. A ready-mixed concrete, characterized in that: a concrete admixture comprising the concrete admixture as claimed in any one of claims 1 to 6.
9. The ready mixed concrete according to claim 8, wherein: the paint comprises the following components in parts by weight:
20-30 parts of cement, 8-10 parts of fly ash, 180 parts of aggregate, 0.8-1 part of concrete admixture and 10-15 parts of water.
10. A concrete obtained by setting and hardening the ready-mixed concrete according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246539.5A CN112851189A (en) | 2021-03-05 | 2021-03-05 | Concrete admixture and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110246539.5A CN112851189A (en) | 2021-03-05 | 2021-03-05 | Concrete admixture and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112851189A true CN112851189A (en) | 2021-05-28 |
Family
ID=75994090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110246539.5A Pending CN112851189A (en) | 2021-03-05 | 2021-03-05 | Concrete admixture and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112851189A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07138060A (en) * | 1993-11-10 | 1995-05-30 | Mitsubishi Materials Corp | Admixture for concrete, concrete mixture using the same and production of concrete |
| CN106186795A (en) * | 2016-07-08 | 2016-12-07 | 江苏苏博特新材料股份有限公司 | A kind of pervious concrete special additive and application thereof |
| CN107082958A (en) * | 2017-06-03 | 2017-08-22 | 合肥伊只门窗有限公司 | A kind of anti-fire door core board and fire resisting timber door |
| CN109678384A (en) * | 2019-01-23 | 2019-04-26 | 济南大学 | A kind of dedicated early-strength admixture of prefabricated components concrete |
-
2021
- 2021-03-05 CN CN202110246539.5A patent/CN112851189A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07138060A (en) * | 1993-11-10 | 1995-05-30 | Mitsubishi Materials Corp | Admixture for concrete, concrete mixture using the same and production of concrete |
| CN106186795A (en) * | 2016-07-08 | 2016-12-07 | 江苏苏博特新材料股份有限公司 | A kind of pervious concrete special additive and application thereof |
| CN107082958A (en) * | 2017-06-03 | 2017-08-22 | 合肥伊只门窗有限公司 | A kind of anti-fire door core board and fire resisting timber door |
| CN109678384A (en) * | 2019-01-23 | 2019-04-26 | 济南大学 | A kind of dedicated early-strength admixture of prefabricated components concrete |
Non-Patent Citations (2)
| Title |
|---|
| 王志江 等: "《有机化学》", 31 July 2019, 中国医药科技出版社 * |
| 赵佩瑾 等: "《医用化学基础》", 31 July 2007, 人民军医出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104310839B (en) | Concrete intensifier and preparation method | |
| CN105293974B (en) | A kind of concrete is combined super instant coagulant and its application method | |
| NO831591L (en) | ADDITIVE FOR HYDRAULIC CEMENT MIXTURES. | |
| CN110255955B (en) | Alkali-free liquid accelerator and preparation method and application thereof | |
| CN115073116B (en) | Grouting material containing steel slag solid waste base cementing material | |
| CN110194608B (en) | Concrete slump retaining agent and preparation method and application method thereof | |
| CN112279550B (en) | Concrete synergist and preparation method thereof | |
| CN114656600A (en) | Preparation method of high-solid-content early-strength polycarboxylate superplasticizer | |
| JP7038052B2 (en) | Liquid fast-strengthening agent for cement concrete | |
| CN110563376A (en) | concrete reinforcing agent suitable for being prepared from machine-made sand and preparation method of mother liquor of concrete reinforcing agent | |
| CN112521099A (en) | Production process of quick-setting concrete | |
| CN111943557A (en) | Composite dry-mixed mortar additive and preparation method thereof | |
| CN111978042A (en) | Environment-friendly composite quick-drying high-performance concrete | |
| CN115448633B (en) | Polycarboxylic acid desensitizer and preparation method thereof | |
| CN117735920A (en) | Preparation process of concrete containing cellulose water reducer | |
| CN112851189A (en) | Concrete admixture and preparation method and application thereof | |
| CN114920890B (en) | Viscosity-reducing additive and preparation method and application thereof | |
| JP2024123366A (en) | Mortar admixture, mortar composition, and mortar | |
| CN113173728B (en) | Alkali-free accelerator for resisting aggregate alkali activity reaction and preparation method thereof | |
| CN114455926A (en) | Cement-based rapid repair material and preparation method thereof | |
| CN113998916A (en) | Composite early strength agent for cement material in low-temperature environment and application thereof | |
| CN112159146A (en) | Novel environment-friendly alkali-free accelerator for concrete spraying and preparation process thereof | |
| CN109160762B (en) | Cement quick-hardening additive and application thereof | |
| CN107759756B (en) | Sulfamate water reducer and preparation method thereof | |
| CN110540401A (en) | sleeve grouting material for high-temperature steel bar connection and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210528 |