CN111484268A - Workability agent for enhancing concrete strength - Google Patents

Workability agent for enhancing concrete strength Download PDF

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Publication number
CN111484268A
CN111484268A CN202010312496.1A CN202010312496A CN111484268A CN 111484268 A CN111484268 A CN 111484268A CN 202010312496 A CN202010312496 A CN 202010312496A CN 111484268 A CN111484268 A CN 111484268A
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concrete
agent
parts
water reducing
strength
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陈集芳
黄俊辉
贺海量
林绍喜
张卓义
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Hunan Zhenhai New Material Technology Co ltd
Guangdong Liuhe New Building Materials Co ltd
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Hunan Zhenhai New Material Technology Co ltd
Guangdong Liuhe New Building Materials Co ltd
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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

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to the technical field of concrete additives, and relates to an peaceability agent for enhancing concrete strength, which comprises the following components in parts by weight: 60-80 parts of water; 5-10 parts of a water reducing agent; 1-3 parts of disodium clodronate; 0.5-1 part of 2, 5-ditert octyl hydroquinone; 0.1-0.2 part of sodium tripolyphosphate. The invention has the advantages that the water reducing effect of the water reducing agent is not easily influenced by the powder content and the mud content in concrete aggregate, and the compressive strength of concrete is not easily influenced.

Description

Workability agent for enhancing concrete strength
Technical Field
The invention relates to the technical field of concrete additives, in particular to an peaceability agent for enhancing the strength of concrete.
Background
At present, the workability agent is an additive which can improve poor workability or great slump loss of fresh concrete caused by poor raw materials or argillaceous components brought by the raw materials within a certain period of time, but has no obvious influence on the setting time and the air content of the concrete.
However, the workability agent can only improve the influence of the difference of the raw materials of the fresh concrete on the slump and the development degree of the concrete, the influence of the mud content in the concrete on the water reducing agent is difficult to solve, the water reducing agent is sensitive to mud and stone powder in concrete aggregate, when the mud content or the powder content in a concrete system is higher, the water reducing rate of the water reducing agent is easily influenced, and even the compressive strength of the concrete can be influenced, so that the improvement space still exists.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a workability agent for reinforcing the strength of concrete.
Aiming at the defects in the prior art, the invention also aims to provide a preparation method of the workability agent for enhancing the concrete strength.
The above object of the present invention is achieved by the following technical solutions:
the workability agent for enhancing the strength of the concrete comprises the following components in parts by mass:
60-80 parts of water;
5-10 parts of a water reducing agent;
1-3 parts of disodium clodronate;
0.5-1 part of 2, 5-ditert octyl hydroquinone;
0.1-0.2 part of sodium tripolyphosphate.
By adopting the technical scheme, the disodium clodronate, the 2, 5-ditert octyl hydroquinone and the sodium tripolyphosphate are matched with each other in a synergistic manner, so that the workability agent is favorable for better adsorbing soil in concrete aggregate, and the slump and the expansion degree of the concrete added with the workability agent are less susceptible to the influence of raw materials of the concrete; meanwhile, the influence of the mud content and the powder content in the concrete aggregate on the water reducing agent is favorably reduced, so that the water reducing effect of the water reducing agent is better, and the compressive strength of the concrete is favorably improved to a certain extent.
The present invention in a preferred example may be further configured to: the paint also comprises the following components in parts by mass:
15-20 parts of sodium phosphate.
By adopting the technical scheme, the disodium clodronate, the 2, 5-ditert octyl hydroquinone and the sodium tripolyphosphate in the workability agent are favorably and uniformly dispersed by adding the sodium phosphate, so that the mutual synergistic cooperation of the disodium clodronate, the 2, 5-ditert octyl hydroquinone and the sodium tripolyphosphate is favorably promoted, the workability agent is favorably and better adsorbed soil and powder in concrete aggregate, and the slump and the expansion degree of the concrete added with the workability agent are more difficultly influenced by raw materials of the concrete; meanwhile, the water reducing effect of the water reducing agent is not easily influenced by the mud content and the powder content in the concrete aggregate, and the compressive strength of the concrete is improved to a certain extent.
The present invention in a preferred example may be further configured to: the water reducing agent is a polycarboxylic acid water reducing agent.
By adopting the technical scheme, the polycarboxylate water reducing agent is used as the water reducing agent, so that the influence of the mud content and the powder content in concrete aggregate on the water reducing effect of the water reducing agent can be reduced better, and the compressive strength of concrete can be improved better to a certain extent.
The present invention in a preferred example may be further configured to: the paint also comprises the following components in parts by mass:
2-5 parts of sodium gluconate.
By adopting the technical scheme, the workability of the concrete added with the workability agent can be better improved by adding the sodium gluconate, so that the compressive strength of the concrete is higher.
The present invention in a preferred example may be further configured to: the paint also comprises the following components in parts by mass:
0.5-1 part of phosphorous acid.
By adopting the technical scheme, the phosphorous acid and the sodium gluconate are added to be matched with each other in a synergistic manner, so that the action of the sodium gluconate is promoted better, and the compressive strength of the concrete is improved better.
The present invention in a preferred example may be further configured to: the paint also comprises the following components in parts by mass:
0.2-0.8 part of mannuronic acid.
By adopting the technical scheme, the mannuronic acid is added, so that the soil adsorption performance of the peaceability agent is favorably improved, the mud content and the powder content in the concrete aggregate are more difficultly influenced on the collapse degree of the concrete added with the peaceability agent, meanwhile, the influence of the mud content and the powder content in the concrete aggregate on the water reducing effect of the water reducing agent is favorably reduced, and the compressive strength of the concrete is favorably improved to a certain extent.
The present invention in a preferred example may be further configured to: the composition also comprises the following components in percentage by mass:
0.1 to 0.3 portion of rosin resin.
By adopting the technical scheme, the addition of the rosin resin is beneficial to better improving the slump and the expansion degree of the concrete, so that the slump and the expansion degree of the concrete are more difficult to be influenced by the raw material of the concrete.
The second aim of the invention is realized by the following technical scheme:
a preparation method of a workability agent for enhancing the strength of concrete comprises the following steps:
step (1), adding water and a water reducing agent into a reaction vessel, and uniformly mixing to form a premix;
step (2), adding sodium tripolyphosphate and disodium clodronate into the premix, and uniformly mixing to form an intermediate mixed solution;
and (3) adding the rest components into the intermediate mixed solution, and uniformly mixing to obtain the workability agent for enhancing the strength of the concrete.
By adopting the technical scheme, the components are favorably and better dispersed and uniformly matched with each other in a synergistic way by controlling the adding sequence of the components, so that the soil adsorption performance of the workability agent is favorably improved, and the slump and the expansion degree of the concrete are more difficultly influenced by the raw materials of the concrete; meanwhile, the influence of the concrete raw materials on the water reducing effect of the water reducing agent is favorably reduced to a certain extent, so that the compressive strength of the concrete is higher.
The present invention in a preferred example may be further configured to: in the step (3), after the rest components are added, the temperature is raised to 45-55 ℃, and then the mixture is stirred and mixed uniformly.
By adopting the technical scheme, through controlling the mixing temperature in the step (3), the components are favorably dissolved and uniformly mixed and dispersed better, so that the components are favorably cooperated with each other better, the obtained peaceful agent is favorably prepared for better adsorbing the soil in the concrete aggregate, the concrete raw material is more difficultly influenced on slump and expansion, and meanwhile, the water reducing effect of the water reducing agent is more difficultly influenced by the mud content and the powder content in the concrete aggregate, so that the compressive strength of the concrete is higher.
In summary, the invention includes at least one of the following beneficial technical effects:
1. by adopting the mutual synergistic cooperation of disodium clodronate, 2, 5-ditert octyl hydroquinone and sodium tripolyphosphate, the workability agent is favorable for better adsorbing soil in concrete aggregate, so that the slump and the expansion degree of the concrete added with the workability agent are less susceptible to the influence of raw materials of the concrete;
2. by adopting the mutual synergistic cooperation of disodium clodronate, 2, 5-ditert octyl hydroquinone and sodium tripolyphosphate, the influence of the mud content and the powder content in concrete aggregate on the water reducing agent is favorably reduced, so that the water reducing effect of the water reducing agent is better, and the compressive strength of concrete is favorably improved to a certain extent;
3. the sodium phosphate is added, so that the synergistic cooperation of disodium clodronate, 2, 5-ditert octyl hydroquinone and sodium tripolyphosphate is promoted better, the slump and the expansion degree of the concrete added with the workability agent are less susceptible to the influence of raw materials of the concrete, the water reducing effect of the water reducing agent is less susceptible to the influence of the mud content and the powder content in concrete aggregate, and the compressive strength of the concrete is improved to a certain extent;
4. through controlling the adding sequence of each component, the components are favorably and better dispersed and uniformly matched with each other in a synergistic manner, the soil adsorption performance of the admixture is favorably and better improved, the slump and the expansion degree of the concrete are more difficultly influenced by the concrete raw material, the influence of the concrete raw material on the water reducing effect of the water reducing agent is favorably and better reduced to a certain extent, and the compressive strength of the concrete is higher.
Drawings
FIG. 1 is a process flow diagram of a method of preparing a workability agent for reinforcing concrete according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the following examples, the naphthalene sulfonate water reducing agent is a naphthalene sulfonate water reducing agent of the model SNF-B of Hubei Aijin chemical Co.
In the following examples, the sulfamate water reducer is 25-97 model number sulfamate water reducer available from Jinan Yongquan commercial Co.
In the following examples, a polycarboxylic acid water reducing agent having a product number of PC180 from Jiangsu Longtao building materials Co.
In the following examples, disodium clodronate was prepared from disodium clodronate available from Nanjing Sanshu Biotech Co., Ltd, having a product number of 22560-50-5.
In the following examples, 2, 5-di-tert-octylhydroquinone was 2, 5-di-tert-octylhydroquinone available from Langtson Biotech Co., Ltd., product number 903-19-5, Zhongshan.
In the following examples, sodium tripolyphosphate, which is 2284 available from national health biotechnology limited of Bao chicken, is used.
In the following examples, sodium phosphate of Mo L-L JZUE-912121, which is available from Dongyang chemical Co., Ltd, was used.
In the following examples, sodium gluconate available from Shandong-West Asia chemical industry Co., Ltd.; trade name: xy11632 was used.
In the following examples, phosphorous acid having a product number of CZAZ028 from Ozun composite New Material Co., Ltd, Changzhou was used.
In the following examples, mannuronic acid of 6814-36-4, available from Hangzhou high-tech chemical Co.
In the following examples, rosin resin from sanderian chemical limited was used as the rosin resin.
Example 1
The raw materials and the contents of the raw materials are shown in table 1, and the unit of the content of each component in table 1 is kg.
Referring to fig. 1, the invention discloses a preparation method of a workability agent for enhancing concrete strength, comprising the following steps:
step (1), adding water and a water reducing agent into a 150L stirring kettle, stirring at the rotating speed of 250r/min, and uniformly stirring and mixing to form a premix.
And (2) adding sodium tripolyphosphate and disodium clodronate into the premix while stirring, and uniformly stirring and mixing to form an intermediate mixed solution.
And (3) adding 2, 5-ditert octyl hydroquinone into the intermediate mixed solution while stirring, raising the temperature to 45 ℃, and uniformly stirring and mixing to obtain the workability agent for enhancing the strength of the concrete.
In this example, the water reducing agent is a naphthalene sulfonate water reducing agent.
Example 2
The difference from example 1 is that:
the components and contents of the raw materials are shown in table 1;
the temperature in step (3) was 50 ℃.
Example 3
The difference from example 1 is that:
the components and contents of the raw materials are shown in table 1;
the temperature in step (3) was 55 ℃.
Example 4
The difference from example 1 is that:
the components and contents of the raw materials are shown in table 1;
the temperature in step (3) was 52 ℃.
TABLE 1
Figure BDA0002458182490000081
Examples 5 to 8
The difference from example 1 is that: the components and contents of the raw materials are shown in table 2.
TABLE 2
Figure BDA0002458182490000082
Figure BDA0002458182490000091
Example 9
The difference from example 4 is that: the water reducing agent is sulfonate water reducing agent.
Example 10
The difference from example 4 is that: the water reducing agent is a polycarboxylic acid water reducing agent.
Examples 11 to 14
The difference from example 1 is that: the components and contents of the raw materials are shown in table 3.
TABLE 3
Figure BDA0002458182490000092
Examples 15 to 18
The difference from example 1 is that: the components and contents of the raw materials are shown in table 4.
TABLE 4
Figure BDA0002458182490000101
Examples 19 to 22
The difference from example 1 is that: the components and contents of the raw materials are shown in table 5.
TABLE 5
Figure BDA0002458182490000102
Examples 23 to 26
The difference from example 1 is that: the components and contents of the raw materials are shown in table 6.
TABLE 6
Figure BDA0002458182490000111
Examples 27 to 30
The difference from example 1 is that: the components and contents of the raw materials are shown in table 7.
TABLE 7
Figure BDA0002458182490000112
Examples 31 to 34
The difference from example 1 is that: the components and contents of the raw materials are shown in table 8.
TABLE 8
Figure BDA0002458182490000121
Comparative examples 1 to 6
The difference from example 1 is that: the components and contents of the raw materials are shown in table 9.
TABLE 9
Figure BDA0002458182490000122
Figure BDA0002458182490000131
Test 1
Using 240kg/m360kg/m of cement3780kg/m of fly ash3Sand, 1050kg/m3Stone, 60kg/m3Fine aggregate and 160kg/m3Water was mixed with stirring, and 12kg of the workability agent prepared in the above examples and comparative examples was added thereto, respectively, and mixed with stirring to form concrete samples, and in addition, concrete samples to which the conventional workability agent was added were used as a control.
The fine aggregate is sample 1 which is environment-friendly recycled stone powder in a stone yard, the fine aggregate is sample 2 which is river sand, and the fine aggregate is sample 3 which is environment-friendly recycled ground stone powder.
And detecting the initial slump (mm), the expansion (mm), the 2h slump (mm) and the expansion (mm) of the concrete sample according to a 3.1 slump and slump expansion method in GB/T50080-2002 Standard of Performance test methods of common concrete mixtures.
Wherein, the fineness modulus of the environment-friendly recycled stone powder in the stone yard is 3.2, and the mud content is 6.9%; the fineness modulus of the river sand is 2.6, and the mud content is 5.9%; the fineness modulus of the environment-friendly recovered ground stone powder is 3.0, and the mud content is 7.3%; the traditional workability agent is the workability agent with the product number of 879656 which is purchased from Guangdong water stone desublimation energy-saving building materials science and technology Limited company.
The test data of test 1 are shown in Table 10.
Watch 10
Figure BDA0002458182490000132
Figure BDA0002458182490000141
Figure BDA0002458182490000151
Test 2
The concrete samples in test 1 were tested for 7d compressive strength (MPa) and 28d compressive strength (MPa) according to the third Chapter cubic compressive strength test in GBJ51-85, general concrete mechanical Properties test methods.
The test data of test 2 are shown in Table 11.
TABLE 11
Figure BDA0002458182490000161
Figure BDA0002458182490000171
Figure BDA0002458182490000181
According to the comparison of the data of examples 4 to 8 in table 10 and table 11, the addition of sodium phosphate is beneficial to better improve the slump and the expansion of the concrete added with the prepared workability agent, so that the slump and the expansion of the concrete added with the workability agent are less susceptible to the influence of the concrete raw materials; meanwhile, the water reducing effect of the water reducing agent is not easily influenced, and the compressive strength of the concrete is favorably improved to a certain extent.
According to the comparison of the data of the example 4 and the examples 9 to 10 in the table 10 and the table 11, the water reducing effect of the water reducing agent is less affected by the content of the powder and the content of the mud in the concrete aggregate by controlling the type of the water reducing agent; meanwhile, the water reducing effect of the water reducing agent is not easily influenced by the concrete raw materials, and the compressive strength of the concrete is improved to a certain extent.
According to the comparison of the data of the examples 4 and 11-22 in the tables 10 and 11, the sodium gluconate is added independently, so that the influence of the mud content and the powder content of the concrete raw material on the water reducing effect of the water reducer is favorably reduced, and the compressive strength of the concrete added with the workability agent is favorably improved to a certain extent; through adding phosphorous acid alone, the compressive strength's of concrete that has added and has had little influence to the peaceful agent influence, only when sodium gluconate and phosphorous acid are mutually cooperateed, just can reduce the influence of the mud content and the powder content of concrete raw materials to the water reducing effect of water-reducing agent better for the compressive strength of concrete is higher.
According to the comparison of the data of the example 4 and the examples 23-26 in the tables 10 and 11, the mannuronic acid is added, so that the influence of the mud content and the powder content of the concrete aggregate on the slump and the expansion of the concrete added with the workability agent can be favorably reduced, and the slump and the expansion of the concrete added with the workability agent are less easily influenced by the mud content and the powder content of the concrete aggregate; meanwhile, the water reducing effect of the concrete added with the peaceralization agent is not easily influenced by the mud content and the powder content in the concrete aggregate, and the compressive strength of the concrete is favorably improved.
According to the comparison of the data of example 4 and examples 27 to 30 in tables 10 and 11, the addition of the rosin resin is beneficial to better improve the slump and the expansion of the concrete added with the workability agent, so that the slump and the expansion of the concrete added with the workability agent are less susceptible to the influence of the mud content and the powder content in the concrete aggregate.
According to the data comparison between the example 4 and the comparative examples 1 to 6 in tables 10 and 11, only when disodium clodronate, 2, 5-ditert octyl hydroquinone and sodium tripolyphosphate are synergistically matched with each other, the slump and the expansion degree of the concrete added with the workability agent can be better improved, so that the slump and the expansion degree of the concrete added with the workability agent are less susceptible to the influence of the mud content and the powder content in the concrete aggregate; meanwhile, the method is favorable for better reducing the influence of the mud content and the powder content in the concrete aggregate on the water reducing effect of the water reducing agent, so that the compressive strength of the concrete is higher.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (9)

1. The workability agent for reinforcing the strength of concrete is characterized by comprising the following components in parts by weight: the paint comprises the following components in parts by mass:
60-80 parts of water;
5-10 parts of a water reducing agent;
1-3 parts of disodium clodronate;
0.5-1 part of 2, 5-ditert octyl hydroquinone;
0.1-0.2 part of sodium tripolyphosphate.
2. A workability agent for reinforcing the strength of concrete according to claim 1, characterized in that: the paint also comprises the following components in parts by mass:
15-20 parts of sodium phosphate.
3. A workability agent for reinforcing the strength of concrete according to any of claims 1-2, characterized in that: the water reducing agent is a polycarboxylic acid water reducing agent.
4. A workability agent for reinforcing the strength of concrete according to any of claims 1-2, characterized in that: the paint also comprises the following components in parts by mass:
2-5 parts of sodium gluconate.
5. A workability agent for reinforcing the strength of concrete according to claim 4, characterized by: the paint also comprises the following components in parts by mass:
0.5-1 part of phosphorous acid.
6. A workability agent for reinforcing the strength of concrete according to any of claims 1-2, characterized in that: the paint also comprises the following components in parts by mass:
0.2-0.8 part of mannuronic acid.
7. A workability agent for reinforcing the strength of concrete according to any of claims 1-2, characterized in that: the composition also comprises the following components in percentage by mass:
0.1 to 0.3 portion of rosin resin.
8. A method of preparing a workability agent for reinforcing the strength of concrete according to any of claims 1-7, characterized in that: the method comprises the following steps:
step (1), adding water and a water reducing agent into a reaction vessel, and uniformly mixing to form a premix;
step (2), adding sodium tripolyphosphate and disodium clodronate into the premix, and uniformly mixing to form an intermediate mixed solution;
and (3) adding the rest components into the intermediate mixed solution, and uniformly mixing to obtain the workability agent for enhancing the strength of the concrete.
9. A method of preparing a workability agent for reinforcing concrete strength according to claim 8, characterized in that: in the step (3), after the rest components are added, the temperature is raised to 45-55 ℃, and then the mixture is stirred and mixed uniformly.
CN202010312496.1A 2020-04-20 2020-04-20 Workability agent for enhancing concrete strength Withdrawn CN111484268A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102101791A (en) * 2011-02-23 2011-06-22 江苏博特新材料有限公司 High-temperature resistant cement emulsified asphalt mortar material
CN102718430A (en) * 2012-06-29 2012-10-10 山东华伟银凯建材科技股份有限公司 Mud content inhibitor for concrete doped with polycarboxylic acid type water reducer and preparation method and application method of mud content inhibitor
CN109665746A (en) * 2018-12-27 2019-04-23 广州华隆建筑材料有限公司 A kind of cement water reducing agent and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102101791A (en) * 2011-02-23 2011-06-22 江苏博特新材料有限公司 High-temperature resistant cement emulsified asphalt mortar material
CN102718430A (en) * 2012-06-29 2012-10-10 山东华伟银凯建材科技股份有限公司 Mud content inhibitor for concrete doped with polycarboxylic acid type water reducer and preparation method and application method of mud content inhibitor
CN109665746A (en) * 2018-12-27 2019-04-23 广州华隆建筑材料有限公司 A kind of cement water reducing agent and preparation method thereof

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Application publication date: 20200804