CN114524648A - Inorganic waterproof material and preparation method thereof - Google Patents
Inorganic waterproof material and preparation method thereof Download PDFInfo
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- CN114524648A CN114524648A CN202210256952.4A CN202210256952A CN114524648A CN 114524648 A CN114524648 A CN 114524648A CN 202210256952 A CN202210256952 A CN 202210256952A CN 114524648 A CN114524648 A CN 114524648A
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- sodium bicarbonate
- sodium carbonate
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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
- C04B28/04—Portland 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
- 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
-
- 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of waterproof materials, and particularly relates to an inorganic waterproof material and a preparation method thereof, wherein the inorganic waterproof material is prepared from the following raw materials in parts by weight: 70-80 parts of silicate cement, 100 parts of fine river sand and 110 parts of sodium carbonate, 10-15 parts of sodium carbonate, 5-10 parts of sodium bicarbonate, 1-3 parts of a water reducing agent and 30-40 parts of water; the invention firstly hydrates the cement, generates calcium silicate hydrate and calcium hydroxide after hydration, then adds sodium carbonate and sodium bicarbonate into the hydrated base material, the sodium carbonate reacts with the calcium hydroxide to generate insoluble calcium carbonate, in situ fills up the fine pores in the base material, the base material is compacted, then carries out heat preservation treatment on the system, the sodium bicarbonate is heated and decomposed to generate gas carbon dioxide, and the carbon dioxide gas can enter the pores due to higher fluidity of the gas, thereby further filling the fine pores in the system, reducing the defect porosity in the system and improving the anti-permeability performance of the base material.
Description
Technical Field
The invention belongs to the technical field of waterproof materials, and particularly relates to an inorganic waterproof material and a preparation method thereof.
Background
The waterproof material is mainly used in the building engineering, the water leakage is an important problem to be overcome in the building engineering, the waterproof material can be roughly divided into a flexible material and a rigid material at present, the flexible material mainly refers to that organic raw materials are adopted, a waterproof layer is constructed on the surface of the material through chemical modification, and the waterproof layer contains a large number of hydrophobic groups, so that the defect that the material is aged or the mechanical property is reduced along with the prolonging of time, and the waterproof effect cannot be maintained for a long time; the rigid material uses cement as a main raw material, improves the compactness of the interior of the cement by adding effective components, and makes up for the defects of the cement, thereby improving the waterproof effect, but because the cement raw material has cracks and a gap structure and is distributed in the material in an irregular form, the cement raw material is not easy to be completely filled or eliminated, and the leakage problem is not solved.
Disclosure of Invention
In order to solve the technical problems, the invention provides an inorganic waterproof material and a preparation method thereof, portland cement and fine river sand are used as main base materials, the main base materials are hydrated firstly, then sodium carbonate is added to react with hydration products, insoluble solids are generated in situ, base material cracks and gaps are directly filled in situ, then carbon dioxide gas generated by decomposition of the sodium carbonate is used for filling the base materials, the gas has strong liquidity, the base materials can be filled, micro closed-pore bubbles are formed, the gas is used for further filling the remained cracks and gaps, the defects of the base materials are reduced, the defect of water passing is prevented, and the problem of material leakage is solved.
The invention is realized by the following technical scheme.
The first purpose of the invention is to provide an inorganic waterproof material, which is prepared from the following raw materials in parts by weight: 70-80 parts of Portland cement, 110 parts of fine river sand, 10-15 parts of sodium bicarbonate, 5-10 parts of sodium bicarbonate, 1-3 parts of a water reducing agent and 30-40 parts of water.
Preferably, the water reducing agent is an FDN water reducing agent or a UNF water reducing agent.
The second purpose of the invention is to provide a preparation method of the inorganic waterproof material, which comprises the following steps:
s1, weighing the following raw materials in parts by weight: 70-80 parts of Portland cement, 110 parts of fine river sand, 10-15 parts of sodium bicarbonate, 5-10 parts of sodium bicarbonate, 1-3 parts of a water reducing agent and 30-40 parts of water;
and S2, mixing the raw materials weighed in the S1, adding water, uniformly stirring, and carrying out heat preservation treatment to obtain the inorganic waterproof material.
Preferably, in S2, the raw material mixing mode specifically is: firstly, mixing portland cement, fine river sand and a water reducing agent, adding water, uniformly stirring, standing to prepare a premix, then adding sodium bicarbonate and sodium bicarbonate, uniformly stirring, standing, and standing at 50-60 ℃ for heat preservation to prepare the inorganic waterproof material.
Preferably, in S2, the premix is left to stand for 20-30min to hydrate the system.
Preferably, in S2, after adding sodium bicarbonate and sodium bicarbonate, standing for 15-20min to react sodium carbonate with calcium hydroxide to generate insoluble calcium carbonate, so as to fill up the fine pores in the base material in situ.
Preferably, in S2, standing and maintaining the temperature for 20-30min to ensure that the sodium bicarbonate is heated and decomposed to generate gaseous carbon dioxide.
Compared with the prior art, the invention has the following beneficial effects:
the invention takes portland cement and fine river sand as main base materials, firstly the portland cement and the fine river sand are mixed with a water reducing agent and water to hydrate the cement, the portland cement contains a large amount of tricalcium silicate, the tricalcium silicate hydrates to generate calcium silicate hydrate and calcium hydroxide, then sodium carbonate and sodium bicarbonate are added into the hydrated base materials, the sodium carbonate reacts with the calcium hydroxide to generate insoluble calcium carbonate, the micro pores in the base materials are filled in situ, the base materials are compacted, then the system is subjected to heat preservation treatment, the sodium bicarbonate is heated and decomposed to generate gaseous carbon dioxide, and the carbon dioxide gas can enter the pores due to higher fluidity of the gas, so that the micro pores in the system are further filled, the defect porosity in the system is reduced, and the anti-permeability performance of the base materials is improved; the waterproof paint has the advantages of cheap and easily-obtained raw materials, good waterproof effect and simple preparation method, and is suitable for industrial production.
Detailed Description
In order to make the technical solutions of the present invention better understood and enable those skilled in the art to practice the present invention, the following examples and data are provided for further illustration, but the examples are not intended to limit the present invention.
The experimental methods and the detection methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials are commercially available, unless otherwise specified.
The invention has the conception that the Portland cement and the fine river sand are used as main base materials, the Portland cement and the fine river sand are firstly mixed with a water reducing agent and water to hydrate the cement, the Portland cement contains a large amount of tricalcium silicate, the tricalcium silicate hydrates to generate calcium silicate hydrate and calcium hydroxide, then sodium carbonate and sodium bicarbonate are added into the hydrated base materials, the sodium carbonate reacts with the calcium hydroxide to generate insoluble calcium carbonate, the fine pores in the base materials are filled in situ, the base materials are compacted, then the system is subjected to heat preservation treatment, the sodium bicarbonate is heated and decomposed to generate gas carbon dioxide, and the carbon dioxide gas can enter the gaps due to higher fluidity of the gas, so that the fine pores in the system are further filled, the defect void ratio in the system is reduced, and the anti-permeability performance of the base materials is improved; the waterproof paint has the advantages of cheap and easily-obtained raw materials, good waterproof effect and simple preparation method, and is suitable for industrial production.
Example 1
An inorganic waterproof material is prepared from the following raw materials in parts by weight: 70 parts of portland cement, 100 parts of fine river sand, 10 parts of sodium carbonate, 5 parts of sodium bicarbonate, 1 part of an FDN water reducing agent and 30 parts of water.
The preparation method of the inorganic waterproof material comprises the following steps:
s1, weighing the following raw materials in parts by weight: 70 parts of Portland cement, 100 parts of fine river sand, 10 parts of sodium carbonate, 5 parts of sodium bicarbonate, 1 part of an FDN water reducing agent and 30 parts of water;
s2, firstly, mixing the portland cement, the fine river sand and the water reducing agent, adding water, uniformly stirring, standing for 20min to prepare a premix, then adding sodium carbonate and sodium bicarbonate, uniformly stirring, standing for 15min, standing at 50 ℃ and keeping the temperature for 20min to prepare the inorganic waterproof material.
Example 2
An inorganic waterproof material is prepared from the following raw materials in parts by weight: 80 parts of portland cement, 110 parts of fine river sand, 15 parts of sodium carbonate, 10 parts of sodium bicarbonate, 3 parts of an FDN water reducing agent and 40 parts of water.
The preparation method of the inorganic waterproof material comprises the following steps:
s1, weighing the following raw materials in parts by weight: 80 parts of Portland cement, 110 parts of fine river sand, 15 parts of sodium carbonate, 10 parts of sodium bicarbonate, 3 parts of an FDN water reducing agent and 40 parts of water;
s2, firstly, mixing the portland cement, the fine river sand and the water reducing agent, adding water, uniformly stirring, standing for 30min to prepare a premix, then adding sodium carbonate and sodium bicarbonate, uniformly stirring, standing for 20min, standing at 60 ℃ and preserving heat for 30min to prepare the inorganic waterproof material.
Example 3
An inorganic waterproof material is prepared from the following raw materials in parts by weight: 75 parts of portland cement, 100 parts of fine river sand, 13 parts of sodium carbonate, 10 parts of sodium bicarbonate, 2 parts of an FDN water reducing agent and 35 parts of water.
The preparation method of the inorganic waterproof material comprises the following steps:
s1, weighing the following raw materials in parts by weight: 75 parts of portland cement, 100 parts of fine river sand, 13 parts of sodium carbonate, 10 parts of sodium bicarbonate, 2 parts of an FDN water reducing agent and 35 parts of water;
s2, firstly, mixing the portland cement, the fine river sand and the water reducing agent, adding water, uniformly stirring, standing for 25min to prepare a premix, then adding sodium carbonate and sodium bicarbonate, uniformly stirring, standing for 15min, standing at 55 ℃ and keeping the temperature for 25min to prepare the inorganic waterproof material.
Example 4
An inorganic waterproof material is prepared from the following raw materials in parts by weight: 72 parts of portland cement, 105 parts of fine river sand, 12 parts of sodium carbonate, 5 parts of sodium bicarbonate, 3 parts of an FDN water reducing agent and 30 parts of water.
The preparation method of the inorganic waterproof material comprises the following steps:
s1, weighing the following raw materials in parts by weight: 72 parts of Portland cement, 105 parts of fine river sand, 12 parts of sodium carbonate, 5 parts of sodium bicarbonate, 3 parts of an FDN water reducing agent and 30 parts of water;
s2, firstly, mixing the portland cement, the fine river sand and the water reducing agent, adding water, uniformly stirring, standing for 20-30min to prepare a premix, then adding sodium carbonate and sodium bicarbonate, uniformly stirring, standing for 15-20min, standing at 50-60 ℃ and keeping the temperature for 20-30min to prepare the inorganic waterproof material.
Example 5
An inorganic waterproof material is prepared from the following raw materials in parts by weight: 80 parts of portland cement, 110 parts of fine river sand, 15 parts of sodium carbonate, 6 parts of sodium bicarbonate, 3 parts of an FDN water reducing agent and 40 parts of water.
The preparation method of the inorganic waterproof material comprises the following steps:
s1, weighing the following raw materials in parts by weight: 80 parts of Portland cement, 110 parts of fine river sand, 15 parts of sodium carbonate, 6 parts of sodium bicarbonate, 3 parts of an FDN water reducing agent and 40 parts of water;
s2, firstly, mixing the portland cement, the fine river sand and the water reducing agent, adding water, uniformly stirring, standing for 20min to prepare a premix, then adding sodium carbonate and sodium bicarbonate, uniformly stirring, standing for 20min, standing at 60 ℃ and keeping the temperature for 25min to prepare the inorganic waterproof material.
Comparative example 1
The raw materials and the dosage of the inorganic waterproof material are the same as those in the embodiment 1;
the preparation method of the inorganic waterproof material comprises the following steps:
weighing raw materials with corresponding dosage, directly mixing all the raw materials, and standing at 50 deg.C for 20 min.
Comparative example 2
An inorganic waterproof material, except that sodium carbonate was not contained, and the other components and amounts were the same as in example 1.
The preparation method is the same as example 1.
Comparative example 3
An inorganic waterproof material, except that it did not contain sodium bicarbonate, and the other components and amounts were the same as in example 1.
The preparation method is the same as example 1.
Comparative example 4
An inorganic waterproof material, except that sodium carbonate and sodium bicarbonate were not contained, and the remaining components and amounts were the same as in example 1.
The preparation method is the same as example 1.
The materials prepared in the above examples and comparative examples were characterized, the detection methods were all conventional methods, and the performance data are shown in table 1:
TABLE 1 Properties of materials prepared in the above examples and comparative examples
| Group of | Solids content | Water absorption rate | Water impermeability | Retention of tensile strength after immersion in water |
| Example 1 | 69.2％ | 10.3％ | 0.4MPa, 1h is impermeable | 86.7％ |
| Example 2 | 67.7％ | 9.4％ | 0.4MPa, 1h is impermeable | 84.1％ |
| Example 3 | 73.1％ | 11.2％ | 0.4MPa, 1h is impermeable | 85.4％ |
| Example 4 | 65.9％ | 12.2％ | 0.4MPa, 1h is impermeable | 83.9％ |
| Example 5 | 70.5％ | 8.9％ | 0.4MPa, 1h is impermeable | 87.5％ |
| Comparative example 1 | 65.2％ | 15.1％ | 0.4MPa, 1h water permeability | 75.2％ |
| Comparative example 2 | 61.4％ | 16.8％ | 0.4MPa, 1h water permeability | 69.5％ |
| Comparative example 3 | 63.8％ | 15.2％ | 0.4MPa, 1h water permeability | 72.9％ |
| Comparative example 4 | 57.6％ | 18.7％ | 0.4MPa, 1h water permeability | 61.3％ |
As can be seen from the results of Table 1, comparative example 1, which did not employ the charging method in the examples of the present invention, produced waterproof materials having reduced performance as compared with examples 1 to 5; the comparative example 2 and the comparative example 3 do not contain sodium carbonate and sodium bicarbonate respectively, the performance of the prepared waterproof material is also reduced respectively, and the waterproof performance is lowest when the comparative example 4 does not contain sodium carbonate and sodium bicarbonate at the same time, which shows that the waterproof performance of the material can be improved simultaneously by adding sodium ammonia and sodium bicarbonate into the base material, and the waterproof performance is further improved when the preparation method is matched, namely, the preparation is carried out in a specific adding mode, because the invention has a strict mechanism, in particular: the invention takes portland cement and fine river sand as main base materials, firstly the portland cement and the fine river sand are mixed with a water reducing agent and water to hydrate the cement, the portland cement contains a large amount of tricalcium silicate, the tricalcium silicate hydrates to generate calcium silicate hydrate and calcium hydroxide, then sodium carbonate and sodium bicarbonate are added into the hydrated base materials, the sodium carbonate reacts with the calcium hydroxide to generate insoluble calcium carbonate, the micro pores in the base materials are filled in situ, the base materials are compacted, then the system is subjected to heat preservation treatment, the sodium bicarbonate is heated and decomposed to generate gaseous carbon dioxide, and the carbon dioxide gas can enter the pores due to higher fluidity of the gas, so that the micro pores in the system are further filled, the defect porosity in the system is reduced, and the anti-permeability performance of the base materials is improved. The preparation method can ensure that three stages of hydration, calcium carbonate generation and carbon dioxide generation are carried out fully and sequentially, the three stages have the function of upper and lower connection, the hydration product is the raw material for generating the calcium carbonate, and after the calcium carbonate is filled in situ, the remained gaps are supplemented by the carbon dioxide, so that the gaps can be fully filled.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that such changes and modifications be included within the scope of the appended claims and their equivalents.
Claims (7)
1. The inorganic waterproof material is characterized by being prepared from the following raw materials in parts by weight: 70-80 parts of Portland cement, 110 parts of fine river sand, 10-15 parts of sodium carbonate, 5-10 parts of sodium bicarbonate, 1-3 parts of a water reducing agent and 30-40 parts of water.
2. The inorganic waterproofing material according to claim 1, wherein the water reducing agent is an FDN water reducing agent or an UNF water reducing agent.
3. The method for preparing an inorganic waterproof material according to claim 1, comprising the steps of:
s1, weighing the following raw materials in parts by weight: 70-80 parts of Portland cement, 110 parts of fine river sand, 10-15 parts of sodium carbonate, 5-10 parts of sodium bicarbonate, 1-3 parts of a water reducing agent and 30-40 parts of water;
and S2, mixing the raw materials weighed in the S1, uniformly stirring, and carrying out heat preservation treatment to obtain the inorganic waterproof material.
4. The method for preparing an inorganic waterproof material according to claim 3, wherein in S2, the raw material mixing mode is specifically as follows: firstly, mixing portland cement, fine river sand and a water reducing agent, adding water, uniformly stirring, standing to prepare a premix, then adding sodium carbonate and sodium bicarbonate, uniformly stirring, standing, and standing at 50-60 ℃ for heat preservation to prepare the inorganic waterproof material.
5. The method for preparing an inorganic waterproof material according to claim 4, wherein the premix is left to stand for 20 to 30min in S2.
6. The method for preparing an inorganic waterproof material according to claim 4, wherein sodium carbonate and sodium bicarbonate are added to S2, and then the mixture is left to stand for 15-20 min.
7. The method for preparing an inorganic waterproof material according to claim 4, wherein in S2, standing and heat preservation are carried out for 20-30 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210256952.4A CN114524648A (en) | 2022-03-16 | 2022-03-16 | Inorganic waterproof material and preparation method thereof |
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| CN202210256952.4A CN114524648A (en) | 2022-03-16 | 2022-03-16 | Inorganic waterproof material and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272065A (en) * | 2015-11-18 | 2016-01-27 | 南阳理工学院 | Cement-based permeable crystallization type waterproof material for buildings |
| CN106946518A (en) * | 2017-01-09 | 2017-07-14 | 华南理工大学 | A kind of accelerated cement base infiltration crystallization type selfreparing waterproof material and preparation method thereof |
| WO2017159884A1 (en) * | 2016-03-12 | 2017-09-21 | Ri Byong Hyok | High-performance permeable crystalline waterproof agent, its preparation method and waterproof construction method thereof |
| CN107973620A (en) * | 2017-12-28 | 2018-05-01 | 长沙善道新材料科技有限公司 | A kind of inorganic heat insulation mortar and preparation method thereof |
| CN110218058A (en) * | 2019-06-20 | 2019-09-10 | 祁彦民 | A kind of freeze proof material and restorative procedure |
| CN110550901A (en) * | 2018-05-31 | 2019-12-10 | 中环海化(厦门)船舶智能涂料有限公司 | Cement-based capillary crystalline waterproof coating |
-
2022
- 2022-03-16 CN CN202210256952.4A patent/CN114524648A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272065A (en) * | 2015-11-18 | 2016-01-27 | 南阳理工学院 | Cement-based permeable crystallization type waterproof material for buildings |
| WO2017159884A1 (en) * | 2016-03-12 | 2017-09-21 | Ri Byong Hyok | High-performance permeable crystalline waterproof agent, its preparation method and waterproof construction method thereof |
| CN106946518A (en) * | 2017-01-09 | 2017-07-14 | 华南理工大学 | A kind of accelerated cement base infiltration crystallization type selfreparing waterproof material and preparation method thereof |
| CN107973620A (en) * | 2017-12-28 | 2018-05-01 | 长沙善道新材料科技有限公司 | A kind of inorganic heat insulation mortar and preparation method thereof |
| CN110550901A (en) * | 2018-05-31 | 2019-12-10 | 中环海化(厦门)船舶智能涂料有限公司 | Cement-based capillary crystalline waterproof coating |
| CN110218058A (en) * | 2019-06-20 | 2019-09-10 | 祁彦民 | A kind of freeze proof material and restorative procedure |
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