CN113372054A - Method for greatly improving water-washed sand concrete impermeability by powder-liquid double doping - Google Patents
Method for greatly improving water-washed sand concrete impermeability by powder-liquid double doping Download PDFInfo
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- CN113372054A CN113372054A CN202110829189.5A CN202110829189A CN113372054A CN 113372054 A CN113372054 A CN 113372054A CN 202110829189 A CN202110829189 A CN 202110829189A CN 113372054 A CN113372054 A CN 113372054A
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- impermeability
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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
- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
Abstract
The invention discloses a method for greatly improving the impermeability of washed sand concrete by double doping powder and liquid, which is characterized in that a solid expanding agent and a liquid compacting agent are added in the stirring process of concrete, wherein the concrete consists of the following components in parts by weight: 400 parts of cement, 15-50 parts of mineral powder, 20-60 parts of fly ash, 800 parts of artificial sand, 250 parts of river sand, 800 parts of stone, 5-20 parts of a water reducing agent, 200 parts of water, 20-50 parts of an expanding agent and 0.5-2 parts of a compacting agent; according to the invention, the expanding agent and the compacting agent can effectively improve the anti-permeability performance of the washed sand concrete, and the expanding agent and the compacting agent are simultaneously added into the concrete, so that a synergistic effect can be achieved, the anti-permeability performance of the concrete is greatly improved, and the concrete structure has great practical significance for special requirements.
Description
Technical Field
The invention relates to the technical field of concrete engineering, in particular to a method for greatly improving the impermeability of washed sand concrete by double doping of powder and liquid.
Background
Waterproof concrete (water light concrete) is a concrete which has high impermeability and meets waterproof requirements.
The design of the mix proportion of the traditional waterproof concrete basically adopts a single-doped expanding agent, an additive, steel fibers, synthetic fibers and the like to improve the waterproof grade, although the design requirement can be met, the engineering practice depends on the pouring and maintenance of a construction site to a great extent, particularly, the maintenance of the waterproof concrete is required to be not less than 14 days according to the standard requirement, the condition is more prominent particularly for washing sand concrete, washing artificial sand is poor in aggregate distribution relative to river sand particles, relatively thick, not smooth enough in the clear edge angle of the particle surface, small in stacking density, and bleeding, poor in workability and relatively poor in frost resistance and impermeability of the prepared concrete are easy to occur. And due to the addition of a plurality of external conditions, some projects cannot be maintained strictly according to the requirements of standard specifications, so that the impermeability of the concrete is not high and cannot meet the high standard requirements of impermeability of special projects.
In view of the above, there is a need to develop a method for effectively improving the impermeability of washed sand concrete.
Disclosure of Invention
The invention aims to provide a method for greatly improving the impermeability of washed sand concrete by double doping powder and liquid, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for greatly improving the impermeability of washed sand concrete by powder-liquid double doping is characterized in that a solid expanding agent and a liquid compacting agent are added in the stirring process of the concrete, wherein the concrete consists of the following components in parts by weight: 400 parts of cement, 15-50 parts of mineral powder, 20-60 parts of fly ash, 800 parts of artificial sand, 250 parts of river sand, 800 parts of stone, 5-20 parts of a water reducing agent, 200 parts of water, 20-50 parts of an expanding agent and 0.5-2 parts of a compacting agent.
As a further scheme of the invention: the expanding agent is powder, and the particle diameter of the expanding agent is less than 80 mu m.
As a further scheme of the invention: the content of free calcium oxide in the expanding agent is 35-85 wt%.
As a further scheme of the invention: the compacting agent is prepared from the following raw materials in parts by weight: 10-15 parts of water reducing agent, 5-10 parts of silica sand, 2-8 parts of kaolin, 2-5 parts of sodium hydroxide, 0.5-2 parts of aminotriethanol, 0.5-1 part of citric acid and 15-30 parts of water.
As a still further scheme of the invention: the preparation method of the compacting agent comprises the following steps: dissolving sodium hydroxide in water; adding silica sand and kaolin, stirring and mixing uniformly, and heating to boil; cooling to 70-90 deg.C, adding aminotriethanol and citric acid, stirring at 70-90 deg.C for 65-80min, adding water reducing agent, and mixing to obtain the compacting agent.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the expanding agent and the compacting agent can effectively improve the anti-permeability performance of the washed sand concrete, and the expanding agent and the compacting agent are simultaneously added into the concrete, so that a synergistic effect can be achieved, the anti-permeability performance of the concrete is greatly improved, and the concrete structure has great practical significance for special requirements.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the method for greatly improving the impermeability of washed sand concrete by powder-liquid double doping, a solid expanding agent and a liquid compacting agent are added in the stirring process of the concrete, and the concrete consists of the following components in parts by weight: 400 parts of cement, 15-50 parts of mineral powder, 20-60 parts of fly ash, 800 parts of artificial sand, 250 parts of river sand, 800 parts of stone, 5-20 parts of a water reducing agent, 200 parts of water, 20-50 parts of an expanding agent and 0.5-2 parts of a compacting agent.
The expanding agent is powder, and the particle diameter of the expanding agent is less than 80 mu m.
The content of free calcium oxide in the expanding agent is 35-85 wt%.
The compacting agent is prepared from the following raw materials in parts by weight: 10-15 parts of water reducing agent, 5-10 parts of silica sand, 2-8 parts of kaolin, 2-5 parts of sodium hydroxide, 0.5-2 parts of aminotriethanol, 0.5-1 part of citric acid and 15-30 parts of water.
The preparation method of the compacting agent comprises the following steps: dissolving sodium hydroxide in water; adding silica sand and kaolin, stirring and mixing uniformly, and heating to boil; cooling to 70-90 deg.C, adding aminotriethanol and citric acid, stirring at 70-90 deg.C for 65-80min, adding water reducing agent, and mixing to obtain the compacting agent.
Example 1:
in the embodiment, the concrete comprises 333 parts of cement, 26 parts of mineral powder, 28 parts of fly ash, 616 parts of artificial sand, 200 parts of river sand, 920 parts of stones, 12.6 parts of water reducing agent, 34 parts of expanding agent, 1.03 parts of compacting agent and 176 parts of water, wherein 2347 parts are mixed, poured and maintained according to concrete structure engineering construction specifications.
Comparative example 1:
in the comparative example, the concrete comprises 333 parts of cement, 26 parts of mineral powder, 28 parts of fly ash, 616 parts of artificial sand, 200 parts of river sand, 920 parts of stones, 12.6 parts of water reducing agent, 34 parts of expanding agent and 177 parts of water, and 2347 parts of compacting agent is not added in total, and stirring, pouring and maintenance are carried out according to the concrete structure engineering construction specification.
Comparative example 2:
in the comparative example, the concrete comprises 333 parts of cement, 42 parts of mineral powder, 46 parts of fly ash, 616 parts of artificial sand, 200 parts of river sand, 920 parts of stones, 12.6 parts of water reducing agent, 1.03 parts of compacting agent and 176 parts of water, wherein no expanding agent is added, and 2347 parts are calculated.
Comparative example 3:
in the comparative example, concrete comprises 333 parts of cement, 42 parts of mineral powder, 46 parts of fly ash, 616 parts of artificial sand, 200 parts of river sand, 920 parts of stones, 12.6 parts of water reducing agent and 177 parts of water, and 2347 parts in total without adding an expanding agent and a compacting agent, and is stirred, poured and maintained according to concrete structure engineering construction specifications.
And (3) detecting the impermeability:
the concrete sample blocks prepared in example 1 and comparative examples 1 to 3 were tested for impermeability, according to the impermeability test method of concrete (performed with reference to T0568-2005), and the results are shown in table 1:
| group of | Example 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Impermeability (Water pressure: MPa) | 1.6 | 1.0 | 1.0 | 0.6 |
TABLE 1
The data in table 1 show that the expansive agent and the compacting agent can effectively improve the impermeability of the washed sand concrete, and the expansive agent and the compacting agent are simultaneously added into the concrete to play a synergistic effect, so that the impermeability of the concrete is greatly improved, and the concrete has great practical significance on concrete structures with special requirements.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (5)
1. A method for greatly improving the impermeability of washed sand concrete by powder-liquid double doping is characterized in that: adding a solid expanding agent and a liquid compacting agent in the stirring process of concrete, wherein the concrete consists of the following components in parts by weight: 400 parts of cement, 15-50 parts of mineral powder, 20-60 parts of fly ash, 800 parts of artificial sand, 250 parts of river sand, 800 parts of stone, 5-20 parts of a water reducing agent, 200 parts of water, 20-50 parts of an expanding agent and 0.5-2 parts of a compacting agent.
2. The method for greatly improving the impermeability of washed sand concrete by double doping powder and liquid according to claim 1, wherein the method comprises the following steps: the expanding agent is powder, and the particle diameter of the expanding agent is less than 80 mu m.
3. The method for greatly improving the impermeability of washed sand concrete by double doping powder and liquid according to claim 1, wherein the method comprises the following steps: the content of free calcium oxide in the expanding agent is 35-85 wt%.
4. The method for greatly improving the impermeability of washed sand concrete by double doping powder and liquid according to claim 1, wherein the method comprises the following steps: the compacting agent is prepared from the following raw materials in parts by weight: 10-15 parts of water reducing agent, 5-10 parts of silica sand, 2-8 parts of kaolin, 2-5 parts of sodium hydroxide, 0.5-2 parts of aminotriethanol, 0.5-1 part of citric acid and 15-30 parts of water.
5. The method for greatly improving the impermeability of washed sand concrete by double doping powder and liquid according to claim 4, wherein the method comprises the following steps: the preparation method of the compacting agent comprises the following steps: dissolving sodium hydroxide in water; adding silica sand and kaolin, stirring and mixing uniformly, and heating to boil; cooling to 70-90 deg.C, adding aminotriethanol and citric acid, stirring at 70-90 deg.C for 65-80min, adding water reducing agent, and mixing to obtain the compacting agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829189.5A CN113372054A (en) | 2021-07-22 | 2021-07-22 | Method for greatly improving water-washed sand concrete impermeability by powder-liquid double doping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110829189.5A CN113372054A (en) | 2021-07-22 | 2021-07-22 | Method for greatly improving water-washed sand concrete impermeability by powder-liquid double doping |
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| CN202110829189.5A Pending CN113372054A (en) | 2021-07-22 | 2021-07-22 | Method for greatly improving water-washed sand concrete impermeability by powder-liquid double doping |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276053A (en) * | 2021-12-16 | 2022-04-05 | 民乐县建源建材有限责任公司 | Waterproof concrete modified by cfs-s 2 concrete waterproof compacting agent and preparation method thereof |
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2021
- 2021-07-22 CN CN202110829189.5A patent/CN113372054A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276053A (en) * | 2021-12-16 | 2022-04-05 | 民乐县建源建材有限责任公司 | Waterproof concrete modified by cfs-s 2 concrete waterproof compacting agent and preparation method thereof |
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