CN112358228A - Concrete glue reducing agent and preparation method thereof - Google Patents
Concrete glue reducing agent and preparation method thereof Download PDFInfo
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- CN112358228A CN112358228A CN202011319433.5A CN202011319433A CN112358228A CN 112358228 A CN112358228 A CN 112358228A CN 202011319433 A CN202011319433 A CN 202011319433A CN 112358228 A CN112358228 A CN 112358228A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Colloid Chemistry (AREA)
Abstract
The invention relates to a concrete gel reducing agent and a preparation method thereof, wherein the concrete gel reducing agent is prepared by adding quaternary ammonium salt surfactant and silicone oil in a proper proportion into raw material components, during preparation, firstly adding methyl allyl polyoxyethylene ether polycarboxylate water reducing agent into water, then adding organic amine and organic alcohol for stirring reaction, then adding cellulose ether for stirring reaction for a certain time, and then adding a mixture of the quaternary ammonium salt surfactant and the silicone oil for stirring and mixing reaction to finally prepare the concrete gel reducing agent which is used in concrete. The concrete gel reducing agent can effectively reduce the manufacturing cost, can save 30 kilograms of cement consumption in each concrete with the weight of more than C30, and is compatible with conventional additives without any side effect.
Description
Technical Field
The invention belongs to the technical field of concrete admixtures, and particularly relates to a concrete glue reducing agent and a preparation method thereof.
Background
The concrete is an integral structure with certain strength formed by using cement as a gel material, adding fillers such as water, sand and stone and the like, and adding special concrete additives, and fully stirring to hydrate the cement. Concrete is widely applied to various construction projects as a building base material, and the demand for the concrete is continuously increased along with the continuous development of infrastructure.
After the concrete is fully stirred, the dispersion state of the cement in the concrete has great influence on the performance of the concrete, the better the cement is dispersed in the concrete, the higher the strength of the concrete is, namely, the better the cement is dispersed in the concrete under the condition of ensuring the strength of the concrete, the more the cement is dispersed in the concrete, and the consumption of the cement and/or other fillers can be greatly reduced, so that the production cost of the concrete is reduced. However, in actual conditions, about 20-30% of cement in concrete is not sufficiently dispersed and hydrated, and the cement basically only acts as a filler and does not play a role in enhancing the strength of concrete.
The concrete glue reducer is a novel concrete additive different from a concrete water reducer, is used for reducing the using amount of cement under the condition of ensuring the strength grade of concrete, and does not reduce the mechanical property of the concrete.
However, after the concrete glue reducing agent in the prior art is added, the cement dosage cannot be effectively reduced, and the problems of unstable concrete strength and the like are caused.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a concrete glue reducing agent and a preparation method thereof. The concrete gel reducing agent is used in concrete, obviously reduces the cement consumption, improves the mechanical property and compactness of the concrete, and improves the workability and volume stability of the concrete.
The technical scheme adopted by the invention is as follows:
the concrete gel reducing agent comprises the following raw material components:
18-22 parts of a methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
2-8 parts of organic amine;
0.5-2 parts by weight of organic alcohol;
1-4 parts by weight of cellulose ether;
0.1-0.3 parts by weight of quaternary ammonium salt surfactant;
0.1-0.5 parts by weight of silicone oil;
55-75 parts of water.
Further preferably, the concrete gel reducer comprises the following raw material components:
20 parts by weight of methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
5 parts of organic amine;
1.2 parts by weight of organic alcohol;
cellulose ether, 2.5 parts by weight;
0.2 part by weight of quaternary ammonium salt surfactant;
0.3 part by weight of silicone oil;
water, 65 parts by weight.
The organic amine is diethanolamine.
The organic alcohol is polyvinyl alcohol.
The cellulose ether is one or a mixture of more of carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose or ethyl cellulose.
The quaternary ammonium salt surfactant is alkyl quaternary ammonium salt surfactant.
The silicone oil is amino silicone oil.
The inventor of the application finds that cement in concrete can attract each other to form a flocculation structure after being stirred by adding water. The flocculation structure will wrap 10% -30% of water among cement particles, so that the water molecules can not flow freely and play a lubricating effect. The flocculation phenomenon of the cement can influence the contact area of cement particles and water, delay the hydration process of the cement and reduce the wrapping degree of cement slurry (namely, more sandstone aggregate cannot be wrapped). The water reducing agent can disperse a part of flocculation structure with weaker strength, so that water in the flocculation structure is released, the purpose of reducing the water consumption of concrete is achieved, but the part of flocculation structure with smaller size still exists, the flocculation structure (aggregate) with higher strength still exists, and the water reducing agent cannot effectively destroy the aggregates, so that cement particles and water in the aggregates cannot be released, and the hydration degree, the slurry wrapping degree and the fluidity of cement are influenced. Further, the inventor of the present application finds, through a great deal of creative work, that the prepared concrete glue reducing agent can effectively destroy the aggregate by using a proper proportion of methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent, organic amine, organic alcohol, cellulose ether, quaternary ammonium salt surfactant and silicone oil as raw materials and applying the prepared concrete glue reducing agent to concrete, because: the quaternary ammonium salt surfactant can effectively destroy electrostatic attraction, and the silicone oil is favorable for improving the fluidity of the particles, so that after the concrete gel reducing agent is added, the aggregates can be effectively destroyed, the contact area of the cement particles and water is increased, more sandstone aggregates can be wrapped by less cement, the mechanical property and compactness of concrete can be effectively improved while the cement amount is reduced, and the workability and the volume stability of the concrete are also improved.
The preparation method of the concrete gel reducing agent comprises the following steps:
(1) under the heating condition, adding the polycarboxylate superplasticizer into water, and fully and uniformly stirring for later use;
(2) adding the organic amine and the organic alcohol into the mixture obtained in the step (1), and stirring for reaction for later use;
(3) taking the quaternary ammonium salt surfactant and the silicone oil, and stirring and mixing uniformly to obtain a mixture of the quaternary ammonium salt surfactant and the silicone oil;
(4) and (3) adding cellulose ether into the mixture obtained in the step (2), stirring, then adding a mixture of quaternary ammonium salt surfactant and silicone oil, and stirring and mixing uniformly to obtain the concrete gel reducer.
In the step (1), the heating temperature is 25-40 ℃, and the stirring time is 0.5-1 h;
in the step (2), stirring and reacting for 20-30 min;
in the step (4), the cellulose ether is added and stirred for 2-8min, and the mixture of the quaternary ammonium salt surfactant and the silicone oil is added and stirred for 3-10 min.
The concrete gel reducing agent provided by the invention is used in concrete, can effectively increase the hydration degree of cement, obviously reduces the cement consumption, improves the mechanical property and compactness of the concrete, and improves the workability and volume stability of the concrete.
The preparation method of the concrete gel reducing agent comprises the steps of adding the polycarboxylic acid water reducing agent into water, then adding the organic amine and the organic alcohol for stirring reaction, then adding the cellulose ether for stirring reaction for a certain time, then adding the quaternary ammonium salt surfactant and the silicone oil mixture for stirring mixing reaction, and finally preparing the concrete gel reducing agent which is used in concrete. The concrete gel reducing agent can effectively reduce the manufacturing cost, can save 30 kilograms of cement consumption in each concrete with the weight of more than C30, and is compatible with conventional additives without any side effect.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The concrete gel reducing agent of the present application is commercially available, and any material may be used as long as the specified requirements are satisfied. In the following examples 1 part by weight represents 1 kg.
Example 1
The embodiment provides a concrete gel reducing agent, which is prepared from the following raw materials:
18 parts of methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
8 parts of diethanolamine;
0.5 part by weight of polyvinyl alcohol;
4 parts by weight of carboxymethyl cellulose;
0.1 part by weight of alkyl quaternary ammonium salt surfactant;
0.5 part by weight of amino silicone oil;
55 parts of water.
The preparation method of the concrete gel reducing agent comprises the following steps:
(1) under the heating condition, adding the methyl allyl polyoxyethylene ether polycarboxylic acid water reducer into water at 25 ℃, and fully stirring and mixing for 1h for later use;
(2) adding diethanolamine and polyvinyl alcohol into the mixture obtained in the step (1), and stirring and reacting for 20min for later use;
(3) taking an alkyl quaternary ammonium salt surfactant and amino silicone oil, and stirring and mixing uniformly to obtain a mixture of the alkyl quaternary ammonium salt surfactant and the amino silicone oil;
(4) and (3) adding carboxymethyl cellulose into the mixture obtained in the step (2), stirring for 2min, then adding the mixture of the alkyl quaternary ammonium salt surfactant and the amino silicone oil, and fully stirring and mixing for 3min to obtain the concrete gel reducer.
Example 2
The embodiment provides a concrete gel reducing agent, which is prepared from the following raw materials:
22 parts by weight of a methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
2 parts of diethanolamine;
2 parts by weight of polyvinyl alcohol;
1 part by weight of methyl cellulose;
0.3 part by weight of alkyl quaternary ammonium salt surfactant;
0.1 part by weight of amino silicone oil;
75 parts of water.
The preparation method of the concrete gel reducing agent comprises the following steps:
(1) under the heating condition, adding the methyl allyl polyoxyethylene ether polycarboxylic acid water reducer into water at the temperature of 40 ℃, and fully stirring and mixing for 0.5h for later use;
(2) adding diethanolamine and polyvinyl alcohol into the mixture obtained in the step (1), and stirring and reacting for 30min for later use;
(3) taking an alkyl quaternary ammonium salt surfactant and amino silicone oil, and stirring and mixing uniformly to obtain a mixture of the alkyl quaternary ammonium salt surfactant and the amino silicone oil;
(4) and (3) adding methyl cellulose into the mixture obtained in the step (2), stirring for 8min, then adding the mixture of the alkyl quaternary ammonium salt surfactant and the amino silicone oil, and fully stirring and mixing for 10min to obtain the concrete gel reducer.
Example 3
The embodiment provides a concrete gel reducing agent, which is prepared from the following raw materials:
20 parts by weight of methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
5 parts of diethanolamine;
1.2 parts by weight of polyvinyl alcohol;
2.5 parts by weight of carboxyethyl cellulose;
0.2 part by weight of alkyl quaternary ammonium salt surfactant;
0.3 part by weight of amino silicone oil;
water, 65 parts by weight.
The preparation method of the concrete gel reducing agent comprises the following steps:
(1) under the heating condition, adding the methyl allyl polyoxyethylene ether polycarboxylic acid water reducer into water at the temperature of 32 ℃, and fully stirring and mixing for 0.8h for later use;
(2) adding diethanolamine and polyvinyl alcohol into the mixture obtained in the step (1), and stirring and reacting for 25min for later use;
(3) taking an alkyl quaternary ammonium salt surfactant and amino silicone oil, and stirring and mixing uniformly to obtain a mixture of the alkyl quaternary ammonium salt surfactant and the amino silicone oil;
(4) and (3) adding carboxyethyl cellulose into the mixture obtained in the step (2), stirring for 5min, then adding the mixture of the alkyl quaternary ammonium salt surfactant and the amino silicone oil, and fully stirring and mixing for 6min to obtain the concrete gel reducer.
Example 4
The embodiment provides a concrete gel reducing agent, which is prepared from the following raw materials:
20 parts by weight of methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
6 parts of diethanolamine;
1.5 parts by weight of polyvinyl alcohol;
2 parts by weight of ethyl cellulose;
0.2 part by weight of alkyl quaternary ammonium salt surfactant;
0.4 part by weight of amino silicone oil;
60 parts of water.
The preparation method of the concrete gel reducing agent comprises the following steps:
(1) under the heating condition, adding the methyl allyl polyoxyethylene ether polycarboxylic acid water reducer into water at the temperature of 30 ℃, and fully stirring and mixing for 0.8h for later use;
(2) adding diethanolamine and polyvinyl alcohol into the mixture obtained in the step (1), and stirring and reacting for 26min for later use;
(3) taking an alkyl quaternary ammonium salt surfactant and amino silicone oil, and stirring and mixing uniformly to obtain a mixture of the alkyl quaternary ammonium salt surfactant and the amino silicone oil;
(4) and (3) adding ethyl cellulose into the mixture obtained in the step (2), stirring for 6min, then adding the mixture of the alkyl quaternary ammonium salt surfactant and the amino silicone oil, and fully stirring and mixing for 8min to obtain the concrete gel reducer.
Comparative example 1
The concrete glue reducing agent of the comparative example is different from the concrete glue reducing agent of the example 3 only in the difference of the types of the raw materials, the concrete glue reducing agent of the comparative example adopts raw materials which do not contain alkyl quaternary ammonium salt surfactants, other raw material components are the same as those of the concrete glue reducing agent of the example 3, and the concrete glue reducing agent of the comparative example comprises the following raw materials:
20 parts by weight of methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
5 parts of diethanolamine;
1.2 parts by weight of polyvinyl alcohol;
2.5 parts by weight of carboxyethyl cellulose;
0.3 part by weight of amino silicone oil;
water, 65 parts by weight.
Comparative example 2
The concrete glue reducing agent of the comparative example is different from the concrete glue reducing agent of the example 3 only in the types of raw materials, the raw materials adopted by the concrete glue reducing agent of the comparative example do not contain amino silicone oil, and other raw material components are the same, and the concrete glue reducing agent of the comparative example comprises the following raw materials:
20 parts by weight of methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
5 parts of diethanolamine;
1.2 parts by weight of polyvinyl alcohol;
2.5 parts by weight of carboxyethyl cellulose;
0.2 part by weight of alkyl quaternary ammonium salt surfactant;
water, 65 parts by weight.
Examples of the experiments
In order to verify the performance of the concrete gel reducers of the present invention, examples 3, 1 and 2, the following performance test experiments were performed. And taking concrete without any cement reducer as a reference group A, reducing the cement dosage to supplement sand and adding the concrete reducer described in example 3, comparative example 1 and comparative example 2, wherein the concrete with the cement dosage reduced and the concrete reducer added is sequentially a group B, a group C and a group D, the concrete with the cement dosage reduced and the concrete reducer added on the market is a group E, the concrete with the cement dosage reduced and the sand reduced and the concrete reducer not added is taken as a control group F, and the preparation ratios of different combined concrete are shown in Table 1.
The mixing amount of the concrete gel reducer in the embodiment is 0.6% of the cementing material in the concrete.
TABLE 1 composition of different concretes
The concrete performance test results are shown in table 2.
TABLE 2- -results of testing different concrete Properties
As can be seen from Table 2, after the cement amount is reduced, the performances of the group B (with the concrete gel reducer of example 3 added) are compared with those of the group C-E (with the concrete gel reducer of comparative example 1, the concrete gel reducer of comparative example 2 and the commercially available concrete gel reducer added), and it can be seen that the concrete gel reducer of the invention can effectively improve the mechanical properties and compactness of concrete compared with other groups of concrete gel reducers. In addition, quaternary ammonium salt surfactant and silicone oil in the raw material components of the concrete gel reducing agent must be added at the same time to better exert the synergistic effect, and the mechanical property and compactness of the concrete are improved to the maximum extent.
Compared with the group B and the group F, the concrete gel reducer is added in a certain proportion under the conditions of reducing the cement consumption and replenishing sandstone, so that the water consumption of single-component concrete is not reduced, the working performance of the obtained concrete is not influenced by the reduction of the cement consumption, and the strength of the concrete is improved.
Compared with the group F of the control group, the group B and the group F of the control group show that under the conditions of reducing the cement consumption and replenishing sandstone, the concrete gel reducing agent is added in a certain proportion, the water consumption of single concrete is not reduced, and the working performance of the obtained concrete can be improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The concrete gel reducing agent is characterized by comprising the following raw material components:
18-22 parts of a methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
2-8 parts of organic amine;
0.5-2 parts by weight of organic alcohol;
1-4 parts by weight of cellulose ether;
0.1-0.3 parts by weight of quaternary ammonium salt surfactant;
0.1-0.5 parts by weight of silicone oil;
55-75 parts of water.
2. The concrete gel reducing agent of claim 1, wherein the raw material components are:
20 parts by weight of methyl allyl polyoxyethylene ether polycarboxylic acid water reducing agent;
5 parts of organic amine;
1.2 parts by weight of organic alcohol;
cellulose ether, 2.5 parts by weight;
0.2 part by weight of quaternary ammonium salt surfactant;
0.3 part by weight of silicone oil;
water, 65 parts by weight.
3. The concrete degelling agent of claim 1, wherein the organic amine is diethanolamine.
4. The concrete degelling agent of claim 1, wherein the organic alcohol is polyvinyl alcohol.
5. The concrete size reducer according to claim 1, wherein the cellulose ether is one or a mixture of carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose or ethyl cellulose.
6. The concrete degelling agent of claim 1, wherein the quaternary ammonium salt surfactant is an alkyl quaternary ammonium salt surfactant.
7. The concrete degelling agent of claim 1, wherein the silicone oil is an amino silicone oil.
8. The preparation method of the concrete gel reducing agent according to any one of claims 1 to 7, which is characterized by comprising the following steps:
(1) under the heating condition, adding the polycarboxylate superplasticizer into water, and fully and uniformly stirring for later use;
(2) adding the organic amine and the organic alcohol into the mixture obtained in the step (1), and stirring for reaction for later use;
(3) taking the quaternary ammonium salt surfactant and the silicone oil, and stirring and mixing uniformly to obtain a mixture of the quaternary ammonium salt surfactant and the silicone oil;
(4) and (3) adding cellulose ether into the mixture obtained in the step (2), stirring, then adding a mixture of quaternary ammonium salt surfactant and silicone oil, and stirring and mixing uniformly to obtain the concrete gel reducer.
9. The preparation method of the concrete gel reducing agent according to claim 8, wherein in the step (1), the heating temperature is 25-40 ℃, and the stirring time is 0.5-1 h;
in the step (2), the stirring reaction time is 20-30 min.
10. The method for preparing the concrete gel reducing agent according to claim 8, wherein in the step (4), the stirring time is 2-8min after the cellulose ether is added, and the stirring time is 3-10min after the quaternary ammonium salt surfactant and the silicone oil mixture are added.
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