CN111499255A - Pervious concrete reinforcing stabilizer and preparation method thereof - Google Patents
Pervious concrete reinforcing stabilizer and preparation method thereof Download PDFInfo
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- CN111499255A CN111499255A CN202010308424.XA CN202010308424A CN111499255A CN 111499255 A CN111499255 A CN 111499255A CN 202010308424 A CN202010308424 A CN 202010308424A CN 111499255 A CN111499255 A CN 111499255A
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- pervious concrete
- concrete
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- stabilizer
- concrete reinforcing
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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
Abstract
The invention belongs to the field of pervious concrete, and particularly discloses a pervious concrete reinforcing stabilizer and a preparation method thereof, wherein the pervious concrete reinforcing stabilizer can greatly improve the compressive strength of the obtained concrete on the premise of ensuring good water permeability of pervious concrete, and the 3-day strength is improved by 30%, the 7-day strength is improved by 20%, and the 28-day strength is improved by 15%; the service performance of the pervious concrete is effectively improved, and the technical problem that the strength performance and the water permeability of the existing pervious concrete are difficult to take into account is solved; under the condition of ensuring the same concrete compressive strength, the pervious concrete reinforcing agent can also improve the frost resistance and the stability of the concrete, and compared with the common concrete, the frost resistance is improved by 50 percent, and the stability is improved by 80 percent; the water concrete reinforcing stabilizer is applied to the production of pervious concrete, greatly improves the performance of the pervious concrete, can effectively solve a series of rainwater drainage problems, and has important social benefits.
Description
Technical Field
The invention belongs to the field of pervious concrete, and particularly relates to a pervious concrete reinforcing stabilizer and a preparation method thereof.
Background
With the construction of modern cities, the earth surface is gradually covered by buildings or concrete, and the covering of the waterproof materials has great negative influence on the ecological environment of the cities. The groundwater cannot be supplemented, the groundwater level is lowered, and the ground is caused to sink; rainwater can be discharged only through the urban drainage pipe network, and waterlogging is easily caused when the rainwater is large or the urban drainage pipe network fails; coastal areas can also cause reverse flow of seawater. On one hand, the urban afforestation consumes a large amount of irrigation water; on the other hand, a large amount of rainwater can not be utilized, which causes waste of water resources. Under the background, the pervious concrete becomes a research hotspot and a novel material which is widely popularized and applied, and embodies the sustainable development concept of 'symbiosis with the environment'.
Pervious concrete is also called porous concrete, sand-free concrete and pervious terrace. The porous light concrete is prepared by mixing aggregate, cement and water, does not contain fine aggregate, and has the characteristics of air permeability, water permeability and light weight because a thin layer of cement slurry is coated on the surface of coarse aggregate and is mutually bonded to form a honeycomb structure with uniformly distributed pores.
However, the research on the performance of ecological concrete in China is late, the application is only in the starting stage, and the contradiction between the water permeability and the strength of the permeable concrete is difficult to solve at present. The reason is that: to increase the strength, a large amount of glue (cement and fly ash) needs to be added or the porosity needs to be reduced, so that the porosity is reduced and the water permeability coefficient is naturally reduced.
Therefore, it is necessary to develop a permeable concrete reinforcing stabilizer that ensures good permeability and high concrete strength.
Disclosure of Invention
The invention provides a rough surface agent for concrete and a preparation method thereof, which can greatly improve the compressive strength of the obtained concrete on the premise of ensuring the good water permeability of the pervious concrete and solve the technical problem that the strength performance and the water permeability of the existing pervious concrete are difficult to be considered simultaneously.
The technical scheme of the invention is realized as follows:
a pervious concrete reinforcing stabilizer comprises the following raw materials in parts by weight:
preferably, the reinforcing agent is fumed silica or nanoscaled silica.
Preferably, the water reducing agent is one or more of a polycarboxylic acid powder high-efficiency water reducing agent, a naphthalene water reducing agent, an aliphatic water reducing agent and a sulfamic acid water reducing agent.
Preferably, the air entraining agent is a rosin thermopolymer and/or a rosin soap.
Preferably, the stabilizer is hydroxypropyl methyl cellulose.
Preferably, the carrier is fly ash or powdered ore.
The invention also provides a preparation method of the pervious concrete reinforcing stabilizer, which comprises the following steps:
weighing a reinforcing agent, a water reducing agent, an air entraining agent, a stabilizer and a carrier according to parts by weight;
and adding the reinforcing agent, the water reducing agent, the air entraining agent, the stabilizing agent and the carrier into a mixer, and uniformly mixing to obtain the pervious concrete reinforcing stabilizing agent.
The invention provides a pervious concrete reinforcing stabilizer and a preparation method thereof, and the pervious concrete reinforcing stabilizer has the following advantages:
1) on the premise of ensuring good water permeability of the pervious concrete, the pervious concrete reinforcing stabilizer can greatly improve the compressive strength of the obtained concrete, the strength of the pervious concrete is improved by 30 percent in 3 days, the strength of the pervious concrete is improved by 20 percent in 7 days, and the strength of the pervious concrete is improved by 15 percent in 28 days; the service performance of the obtained pervious concrete is effectively improved, the technical problem that the strength performance and the water permeability of the existing pervious concrete are difficult to be considered is solved, the synchronous improvement of the strength performance and the water permeability of the pervious concrete is realized, and the application field of the pervious concrete is widened;
2) under the condition of ensuring the same concrete compressive strength, the pervious concrete reinforcing agent can also improve the frost resistance and the stability of the concrete, and compared with the common concrete, the frost resistance is improved by 50 percent, and the stability is improved by 80 percent;
3) the water concrete reinforcing stabilizer is applied to the production of pervious concrete, greatly improves the performance of the pervious concrete, can effectively solve a series of rainwater drainage problems, and has important social benefits.
Detailed Description
The invention provides a pervious concrete reinforcing stabilizer which comprises the following raw materials in parts by weight:
on the premise of ensuring good water permeability of the pervious concrete, the pervious concrete reinforcing stabilizer can greatly improve the compressive strength of the obtained concrete, the 3-day strength is improved by 30%, the 7-day strength is improved by 20%, and the 28-day strength is improved by 15%; the service performance of the obtained pervious concrete is effectively improved, the technical problem that the strength performance and the water permeability of the existing pervious concrete are difficult to be considered is solved, the synchronous improvement of the strength performance and the water permeability of the pervious concrete is realized, and the application field of the pervious concrete is widened; under the condition of ensuring the same concrete compressive strength, the pervious concrete reinforcing agent can also improve the frost resistance and the stability of the concrete, and compared with the common concrete, the frost resistance is improved by 50 percent, and the stability is improved by 80 percent; the water concrete reinforcing stabilizer is applied to the production of pervious concrete, greatly improves the performance of the pervious concrete, can effectively solve a series of rainwater drainage problems, and has important social benefits.
The reinforcing agent is used for enhancing the compressive strength of concrete; in an embodiment of the invention, the reinforcing agent is fumed silica or nanoscopic silica. Wherein, the weight portion of the reinforcing agent is 5 to 7 portions; in the embodiment of the invention, the weight part of the reinforcing agent is 5.5-6.5 parts; in a preferred embodiment, the reinforcing agent is present in 6 parts by weight.
The water reducing agent is beneficial to the dispersion of concrete particles, reduces the unit water consumption and improves the fluidity of concrete. In the embodiment of the invention, the water reducing agent is one or more of a polycarboxylic acid water reducing agent, a naphthalene water reducing agent, an aliphatic water reducing agent and a sulfamic acid water reducing agent. Wherein the water reducing agent is 5-7 parts by weight; in the embodiment of the invention, the weight part of the water reducing agent is 5.5-6.5 parts; in a preferred embodiment, the water reducing agent is present in an amount of 6.2 parts by weight.
The air entraining agent can improve frost resistance and workability. In an embodiment of the invention, the air entraining agent is a rosin thermopolymer and/or a rosin soap. Wherein the air entraining agent accounts for 0.03 to 0.04 weight part; in the embodiment of the invention, the weight part of the air entraining agent is 0.033-0.036; in a preferred embodiment, the air entraining agent is present in an amount of 0.035 parts by weight.
The air entraining agent is a powder.
The stabilizer can increase the viscosity of concrete particles, so that water in the concrete is restrained, and the compressive strength of the concrete can be improved while the water permeability of the concrete can be ensured. In an embodiment of the invention, the stabilizer is hydroxypropyl methylcellulose, which is a fast dissolving type. Wherein, the weight portion of the stabilizer is 0.5 to 1.5; in the embodiment of the invention, the weight portion of the stabilizer is 0.8-1.2 portions; in a preferred embodiment, the weight part of the stabilizer is 1 part.
In the invention, the weight portion of the carrier is 30-40; in the examples of the present invention, the weight part of the carrier is 35 to 37 parts; in a preferred embodiment, the weight part of the carrier is 36.4 parts.
It is noted that the carrier is fly ash or mineral powder.
The invention also provides a preparation method of the pervious concrete reinforcing stabilizer, which comprises the following steps:
weighing a reinforcing agent, a water reducing agent, an air entraining agent, a stabilizer and a carrier according to parts by weight;
and adding the reinforcing agent, the water reducing agent, the air entraining agent, the stabilizing agent and the carrier into a mixer, and uniformly mixing to obtain the pervious concrete reinforcing stabilizing agent.
Wherein, the reinforcing agent, the water reducing agent, the air entraining agent, the stabilizing agent and the carrier are all the same as above, and are not repeated herein.
The pervious concrete reinforcing stabilizer prepared by the preparation method can greatly improve the compressive strength, frost resistance and stability of the obtained concrete on the premise of ensuring good water permeability of the pervious concrete, can effectively solve a series of rainwater drainage problems by applying the reinforcing stabilizer to the production of the pervious concrete, and has important social benefits.
In order to further illustrate the present invention, the following will describe a pervious concrete reinforcing stabilizer and a preparation method thereof in detail with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The pervious concrete reinforcing stabilizer comprises the following raw materials in parts by weight:
the preparation method of the pervious concrete reinforcing stabilizer comprises the following steps:
weighing gas-phase silicon dioxide, a sulfamic acid water reducing agent, rosin thermopolymer, hydroxypropyl methyl cellulose and fly ash according to parts by weight;
adding gas-phase silicon dioxide, a sulfamic acid water reducing agent, rosin thermopolymer, hydroxypropyl methyl cellulose and fly ash into a mixer, and uniformly mixing to obtain the pervious concrete reinforcing stabilizer.
Example 2
The pervious concrete reinforcing stabilizer comprises the following raw materials in parts by weight:
weighing nanoscale silicon dioxide, an aliphatic water reducing agent, rosin soap, hydroxypropyl methyl cellulose and fly ash in parts by weight;
adding the meter-grade silicon dioxide, the aliphatic water reducing agent, the rosin soap, the hydroxypropyl methyl cellulose and the fly ash into a mixer, and uniformly mixing to obtain the pervious concrete reinforcing stabilizer.
Example 3
The pervious concrete reinforcing stabilizer comprises the following raw materials in parts by weight:
weighing nanoscale silicon dioxide, a naphthalene water reducer, rosin soap, hydroxypropyl methyl cellulose and mineral powder in parts by weight;
adding the nano-scale silicon dioxide, the naphthalene water reducer, the rosin soap, the hydroxypropyl methyl cellulose and the mineral powder into a mixer, and uniformly mixing to obtain the pervious concrete reinforcing stabilizer.
Example 4
The pervious concrete reinforcing stabilizer comprises the following raw materials in parts by weight:
weighing gas-phase silicon dioxide, polycarboxylic acid powder high-efficiency water reducing agent, rosin thermopolymer, rosin soap, hydroxypropyl methyl cellulose and mineral powder in parts by weight;
adding gas-phase silicon dioxide, polycarboxylic acid powder high-efficiency water reducing agent, rosin thermopolymer, rosin soap, hydroxypropyl methyl cellulose and mineral powder into a mixer, and uniformly mixing to obtain the pervious concrete reinforcing stabilizer.
Example 5
The pervious concrete reinforcing stabilizer comprises the following raw materials in parts by weight:
the preparation method of the pervious concrete reinforcing stabilizer comprises the following steps:
weighing gas-phase silicon dioxide, polycarboxylic acid powder high-efficiency water reducing agent, rosin thermopolymer, hydroxypropyl methyl cellulose and fly ash in parts by weight;
adding gas-phase silicon dioxide, polycarboxylic acid powder high-efficiency water reducing agent, rosin thermopolymer, hydroxypropyl methyl cellulose and fly ash into a mixer, and uniformly mixing to obtain the pervious concrete reinforcing stabilizer.
Taking the pervious concrete reinforcing stabilizer prepared in the example 5 as an example, the pervious concrete reinforcing stabilizer is added into common concrete, and the adding amount of the pervious concrete reinforcing stabilizer prepared in the example 5 is 5.0 percent of the weight of the common concrete, and the pervious concrete reinforcing stabilizer is taken as an experimental group; the compressive strength of the pervious concrete as a blank control group was tested, wherein the compressive strength is shown in table 1:
TABLE 1 results of the experiment
The results are as follows:
1) compared with common concrete, the pervious concrete reinforcing stabilizer provided by the invention can improve the 3-day strength of the concrete by 30%, the 7-day strength by 20% and the 28-day strength by 15%.
2) Compared with common concrete, the pervious concrete reinforcing stabilizer provided by the invention can improve the frost resistance of the concrete by 50%.
3) Compared with common concrete, the pervious concrete reinforcing stabilizer provided by the invention can improve the stability of the concrete by 80%.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The pervious concrete reinforcing stabilizer is characterized by comprising the following raw materials in parts by weight:
2. the pervious concrete reinforcing stabilizer according to claim 1, characterized in that the reinforcing agent is fumed silica or nano-scale silica.
3. The pervious concrete reinforcing and stabilizing agent of claim 1, characterized in that the water reducing agent is one or more of polycarboxylic acid powder high-efficiency water reducing agent, naphthalene water reducing agent, aliphatic water reducing agent and sulfamic acid water reducing agent.
4. The pervious concrete reinforcing stabilizer according to claim 1, characterized in that the air-entraining agent is a rosin thermopolymer and/or a rosin soap.
5. The pervious concrete reinforcing stabilizer of claim 1, characterized in that the stabilizer is hydroxypropyl methyl cellulose.
6. The pervious concrete reinforcing stabilizer according to claim 1, characterized in that the carrier is fly ash or mineral powder.
7. A method for preparing a pervious concrete reinforcing stabilizer according to any one of claims 1 to 6, characterized in that it comprises the following steps:
weighing a reinforcing agent, a water reducing agent, an air entraining agent, a stabilizer and a carrier according to parts by weight;
and adding the reinforcing agent, the water reducing agent, the air entraining agent, the stabilizing agent and the carrier into a mixer, and uniformly mixing to obtain the pervious concrete reinforcing stabilizing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010308424.XA CN111499255A (en) | 2020-04-18 | 2020-04-18 | Pervious concrete reinforcing stabilizer and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010308424.XA CN111499255A (en) | 2020-04-18 | 2020-04-18 | Pervious concrete reinforcing stabilizer and preparation method thereof |
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| CN111499255A true CN111499255A (en) | 2020-08-07 |
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| CN202010308424.XA Pending CN111499255A (en) | 2020-04-18 | 2020-04-18 | Pervious concrete reinforcing stabilizer and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0401180D0 (en) * | 2004-01-20 | 2004-02-25 | Tarmac Ltd | Water management system |
| CN106698996A (en) * | 2017-02-27 | 2017-05-24 | 江西省建筑材料工业科学研究设计院 | Water retention reinforcing agent of permeable concrete |
| CN107117856A (en) * | 2017-06-13 | 2017-09-01 | 刘翠芬 | Pure pulvis pervious concrete reinforcing agent and its application method with nanometer humidification |
-
2020
- 2020-04-18 CN CN202010308424.XA patent/CN111499255A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0401180D0 (en) * | 2004-01-20 | 2004-02-25 | Tarmac Ltd | Water management system |
| CN106698996A (en) * | 2017-02-27 | 2017-05-24 | 江西省建筑材料工业科学研究设计院 | Water retention reinforcing agent of permeable concrete |
| CN107117856A (en) * | 2017-06-13 | 2017-09-01 | 刘翠芬 | Pure pulvis pervious concrete reinforcing agent and its application method with nanometer humidification |
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Application publication date: 20200807 |
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