CN111548090A - Sea wall protection mortar - Google Patents
Sea wall protection mortar Download PDFInfo
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- CN111548090A CN111548090A CN202010424180.1A CN202010424180A CN111548090A CN 111548090 A CN111548090 A CN 111548090A CN 202010424180 A CN202010424180 A CN 202010424180A CN 111548090 A CN111548090 A CN 111548090A
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- resin particles
- chelating agent
- mortar
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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)
- Revetment (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses sea wall protection mortar which comprises the following components in parts by weight: 60-75 parts of sand, 20-30 parts of cement, 2-10 parts of gypsum and 0.5-5 parts of chelated water-absorbing resin particles, wherein the chelated water-absorbing resin particles comprise water-absorbing resin particles and a chelating agent chelated on the water-absorbing resin particles, and the chelating agent is formed by combining one or more of calcium salt, magnesium salt, iron salt and aluminum salt. After the conventional seawall protection mortar engineering is finished, the seawall protection mortar is added with water and stirred uniformly, and then construction is carried out on the surface of a seawall splash zone. The sea wall protection mortar provided by the invention contains an expansion material which can absorb water and expand under the action of seawater, the expansion material is in a dormant state when being soaked in common water, and can expand to block cracks under the action of seawater, so that the sea wall is slowed down to continuously erode a sea wall splash zone, the protection effect of the sea wall is enhanced, and the service life of the sea wall is prolonged.
Description
Technical Field
The invention belongs to the technical field of seawall protection materials, and particularly relates to protection mortar capable of preventing sea water from eroding seawalls.
Background
The seawall refers to a dike built in a protection area for defending waves and tidal water, and is generally formed by combining a wave-proof reinforced concrete structure and a tide-blocking seepage-proofing soil body. The sea wall wave-attack-preventing structural material is formed by pouring cement reinforced concrete, is used as an important barrier for coastal storm tide defense and life and property safety protection of the masses, and has higher requirements on the safety and reliability. The seawall can be divided into three parts at the position of seawater: areas that are totally immersed in seawater throughout the year, areas that are not totally immersed in seawater throughout the year, and splash zones that are occasionally immersed in seawater. The area which is not soaked by the seawater all the year round is relatively in a stable environment, and the damage to the retarded soil is relatively less. The area completely soaked in seawater all the year round is mainly soaked by chloride ions in seawater, and the chloride ions take away calcium ions in cement along with the invasion of concrete cracks, so that the steel bars are accelerated to be oxidized and corroded to become thin. Causing the peeling of the concrete and the overall instability of the structure at the cracks. And the splash zone is in a dry-wet cycle state throughout the year in the rising tide and the falling tide. On one hand, the concrete material is easy to be damaged and cracked in a dry-wet cycle, the concentration of chloride ions is increased in a drying period, the damage is accelerated, and seawater further penetrates into the concrete material to cause larger concrete damage. In the long run, the seawall is completely collapsed.
Disclosure of Invention
In order to solve the problem of cracks in a splash zone of the seawall caused by dry-wet circulation, the invention aims to provide the seawall protective mortar which can prevent seawater from continuously eroding the seawall through concrete cracks caused by the dry-wet circulation.
The sea wall protection mortar provided by the invention contains an expansion material which can absorb water and expand under the action of seawater, the expansion material is in a dormant state when being soaked in common water, and can expand to block cracks under the action of seawater, so that the continuous invasion of seawater is slowed down, and the sea wall protection mortar and internal reinforcing steel bars are protected.
After the seawall protection mortar engineering is finished, the seawall protection mortar provided by the invention is added with water and stirred uniformly, and then the construction can be carried out on the surface of the seawall. In the mixing process of the sea wall protection mortar and the clear water, the water-absorbing expansion material does not generate water-absorbing expansion in the alkaline mortar mixing liquid because of surface treatment. After the mortar is finally set, if the mortar is cracked and damaged in the dry-wet circulation of seawater, the treating agent on the surface of the internal water-absorbing expansion material is damaged under the action of the seawater, and the water-absorbing expansion material absorbs water to expand to block the cracks, so that the seawater is prevented from continuously eroding the sea wall, and the effect of protecting the sea wall is achieved.
The technical scheme adopted by the invention is as follows:
the seawall protection mortar is characterized by comprising the following components in parts by weight:
60-75 parts of sand
20-30 parts of cement
2-10 parts of gypsum
0.5-5 parts of chelate water-absorbing resin particles
The chelated water-absorbing resin particles comprise water-absorbing resin particles and a chelating agent chelated on the water-absorbing resin particles, wherein the chelating agent is formed by combining one or more of calcium salt, magnesium salt, iron salt and aluminum salt.
The seawall protection mortar is characterized in that the chelating agent comprises the following components in parts by weight:
0-30 parts of calcium chloride
2-55 parts of magnesium chloride hexahydrate
5-60 parts of ferric trichloride
0-40 parts of aluminum trichloride.
The seawall protection mortar is characterized in that the chelating agent comprises the following components in parts by weight:
2-20 parts of calcium chloride
5-40 parts of magnesium chloride hexahydrate
5-60 parts of ferric trichloride
2-40 parts of aluminum trichloride.
The seawall protection mortar is characterized in that the chelating agent comprises the following components in parts by weight:
2-20 parts of calcium chloride
5-20 parts of magnesium chloride hexahydrate
5-30 parts of ferric trichloride
2-30 parts of aluminum trichloride.
The sea wall protection mortar is characterized in that the water-absorbing resin is acrylate water-absorbing resin, the main component of the common acrylate water-absorbing resin is sodium polyacrylate, the acrylic acid salt water-absorbing resin has extremely high water-absorbing expansion rate, and the acrylic acid salt water-absorbing resin is directly used in mortar powder to be mixed with water, so that a large amount of water can be absorbed and expanded, and the mortar cannot be mixed to form certain strength. But after certain treatment of chelating agent, the mixing of the mortar is not affected. The cation in the sodium polyacrylate is sodium ion of univalent cation, so that the water-absorbent resin has extremely high water-absorption expansion rate. When the sodium polyacrylate water-absorbing resin is in the environment of high-valence cations (such as calcium ions, magnesium ions, aluminum ions, iron ions and the like), the sodium ions in the water-absorbing resin are replaced by the high-valence cations, so that the water-absorbing expansion rate is greatly reduced or even basically not expanded, and the process is called chelation. The deeply chelated water-absorbing resin particles can be expanded again only by the presence of a chelating-releasing substance, in an environment with sufficient sodium ions, high-valence cations can be replaced by the sodium ions, and the water-absorbing resin recovers the water-absorbing capacity again. The seawater contains a large amount of sodium ions which can be used as a de-chelating substance to enable the water-absorbent resin particles to continuously absorb water and expand, so that cracks are blocked, and more seawater is prevented from continuously eroding the sea wall.
The seawall protection mortar is characterized in that the chelate water-absorbent resin particles are deeply chelated in a specific chelating agent for a certain time, and then are drained and dried, so that water swelling does not occur when alkaline mortar is mixed and does not form strength, and the preparation method comprises the following steps:
1) adding a chelating agent into clear water, and fully stirring until the chelating agent is completely dissolved to obtain a chelating agent solution;
2) adding water-absorbent resin particles into the chelating agent solution, keeping stirring to enable the chelating agent to be adsorbed on the surfaces of the water-absorbent resin particles, then taking out the water-absorbent resin particles, draining water, and drying to obtain the chelated water-absorbent resin particles.
The invention takes deeply chelated water-absorbing resin particles as an expandable material, and the expandable material is uniformly mixed with sand, cement, gypsum and the like according to a certain proportion to prepare the novel seawall protection mortar. After the conventional seawall protection mortar engineering is finished, the seawall protection mortar is added with water and stirred uniformly, and then construction is carried out on the surface of a seawall splash zone. After long-term dry-wet circulation, the protective mortar on the surface of the splash zone of the sea wall cracks and is damaged, seawater enters the cracks and contacts with the water-absorbing resin in the cracks, sodium ions in the seawater replace calcium and magnesium ions of the chelating agent, and the water-absorbing resin recovers the water-absorbing capacity again to continue to absorb water and expand. The water-absorbing resin particles after water absorption expansion block the mortar cracks, slow down the seawater to continue to erode the sea wall splash zone, enhance the protective effect of the sea wall and prolong the service life of the sea wall.
The invention has the advantages that:
1. the problem of the sea wall splash zone because of dry wet cycle takes place damaged easily is solved.
2. The protection effect of the protection mortar is improved.
3. The service performance and the service life of the seawall are improved.
4. The problem of seawall protection is solved.
The core of the invention is that the water-absorbing resin particles are deeply chelated and can be used as gravel, and do not absorb water and expand in the process of mixing with mortar; when the mortar is damaged by dry-wet circulation, seawater is contacted with the chelated water-absorbent resin particles, and in a large amount of sodium ion environment, the sodium ions replace high-valence cations in the chelating agent, so that the water-absorbent resin recovers the water-absorbing expansion capacity. The water-absorbing resin absorbs water to expand to block cracks caused by dry-wet circulation and prevent seawater from continuously eroding the sea wall. The intelligent waterproof effect is achieved, the using effect of the protective mortar is greatly improved, and the service life of the seawall is prolonged.
Detailed Description
The present invention is further illustrated by the following examples, which should not be construed as limiting the scope of the invention.
In the following examples and comparative examples:
the water-absorbing resin is acrylate water-absorbing resin, and is purchased from Nantong Byssen chemical Co., Ltd;
gypsum was purchased from Mount Taishan Gypsum, Inc.;
the particle sizes of the chelating water-absorbing resin particles, the gypsum and the sand are all 30-50 meshes;
the cement is ordinary silico-hydrochloric acid cement with the strength grade of 42.5R.
Example 1:
the sea wall protection mortar comprises the following components in parts by weight: 65 parts of sand, 30 parts of cement, 3 parts of gypsum and 2 parts of chelating water-absorbing resin particles.
The preparation method of the chelated water-absorbing resin particles comprises the following steps:
1) adding 40g of chelating agent into 300mL of clear water, and fully stirring until the chelating agent is completely dissolved to obtain a chelating agent solution;
2) adding 50g of water-absorbent resin particles into the chelating agent solution obtained in the step 1), keeping stirring to enable the chelating agent to be adsorbed on the surfaces of the water-absorbent resin particles, carrying out chelating treatment on the surfaces of the water-absorbent resin particles by using the chelating agent, taking out the water-absorbent resin particles, draining off water, and drying to obtain the chelated water-absorbent resin particles.
Wherein the chelating agent consists of the following components in parts by weight:
5 portions of calcium chloride
Magnesium chloride hexahydrate of 20 parts
45 parts of ferric trichloride
And 2 parts of aluminum trichloride.
The seawall protective mortar is prepared by the raw material formula of the example 1, and the conventional preparation method is adopted: mixing 65 parts by weight of sand, 30 parts by weight of cement, 3 parts by weight of gypsum and 2 parts by weight of chelating water-absorbent resin particles, adding 12.5 parts by weight of water, uniformly stirring, and curing at normal temperature to completely evaporate water in the mixture to obtain the sea wall protective mortar.
Example 2:
the sea wall protection mortar has the same component ratio as that in example 1, except that the component ratio of the chelating agent is different, and the other operation conditions are the same as those in example 1.
The chelating agent of example 2 is composed of the following components in parts by weight:
10 portions of calcium chloride
Magnesium chloride hexahydrate of 5 parts
20 parts of ferric trichloride
30 parts of aluminum trichloride.
Example 3:
the sea wall protection mortar has the same component ratio as that in example 1, except that the component ratio of the chelating agent is different, and the other operation conditions are the same as those in example 1.
The chelating agent of example 3 is composed of the following components in parts by weight:
18 portions of calcium chloride
10 portions of magnesium chloride hexahydrate
5 parts of ferric trichloride
15 parts of aluminum trichloride.
The chelate water-absorbent resin particles prepared in examples 1 to 3 were subjected to a water absorption property test: the chelating water-absorbent resin particles are soaked in clear water or mortar slurry with a formula of M30 at room temperature for 7 days, and the water absorption expansion rate of the chelating water-absorbent resin particles is not more than 5%.
Comparative example 1:
the sea wall protection mortar comprises the following components in parts by weight: 67 parts of sand, 30 parts of cement and 3 parts of gypsum. It can be seen that the comparative example 1 differs from the component of example 1 in that "2 parts of the chelate water-absorbent resin particles are replaced with sand of the same weight".
The seawall protective mortar is prepared by the raw material formula of the comparative example 1, and the conventional preparation method is adopted: 67 parts of sand, 30 parts of cement and 3 parts of gypsum are mixed, 12.5 parts of water is added and uniformly stirred, and then the sea wall protective mortar is maintained at normal temperature to completely evaporate the water in the mixture, so that the sea wall protective mortar is prepared.
The compressive strength test of the seawall protection mortar prepared in the example 1 and the seawall protection mortar prepared in the comparative example 1 are respectively carried out by adopting the detection standard of GB/T25181-2010, and the results show that: the compressive strength of the seawall protective mortar of example 1 was approximately equivalent to that of the seawall protective mortar of comparative example 1.
The seawall protection mortar prepared in example 1 and comparative example 1 were subjected to a salt tolerance test, which was as follows: an aqueous solution containing 3.3% NaCl was prepared in advance and labeled as simulated seawater. And leaching the surface of the seawall protection mortar 2 times with simulated seawater every day in an outdoor natural environment, wherein the simulated seawater used for leaching each time is just used for wetting the surface of the seawall protection mortar, and naturally drying after each leaching. After 6 months of simulated seawater leaching, the results show that: the cracks occurred in both the seawall protection mortar of example 1 and comparative example 1, but the cracks occurred in the seawall protection mortar of comparative example 1 were deep, whereas the cracks occurred in the seawall protection mortar of example 1 were shallow, and the cracks were filled with transparent gel-like water-absorbing resin particles after water-swelling, which substantially prevented the water from penetrating further.
The statements in this specification merely set forth a list of implementations of the inventive concept and the scope of the present invention should not be construed as limited to the particular forms set forth in the examples.
Claims (6)
1. The sea wall protection mortar is characterized by comprising the following components in parts by weight:
60-75 parts of sand
20-30 parts of cement
2-10 parts of gypsum
0.5-5 parts of chelate water-absorbing resin particles
The chelated water-absorbing resin particles comprise water-absorbing resin particles and a chelating agent chelated on the water-absorbing resin particles, wherein the chelating agent is formed by combining one or more of calcium salt, magnesium salt, iron salt and aluminum salt.
2. The seawall protection mortar of claim 1, wherein the chelating agent comprises the following components in parts by weight:
0-30 parts of calcium chloride
2-55 parts of magnesium chloride hexahydrate
5-60 parts of ferric trichloride
0-40 parts of aluminum trichloride.
3. The seawall protection mortar of claim 2, wherein the chelating agent comprises the following components in parts by weight:
2-20 parts of calcium chloride
5-40 parts of magnesium chloride hexahydrate
5-60 parts of ferric trichloride
2-40 parts of aluminum trichloride.
4. The seawall protection mortar of claim 3, wherein the chelating agent comprises the following components in parts by weight:
2-20 parts of calcium chloride
5-20 parts of magnesium chloride hexahydrate
5-30 parts of ferric trichloride
2-30 parts of aluminum trichloride.
5. The mortar for sea wall protection according to claim 1, wherein the water-absorbent resin is an acrylic acid salt water-absorbent resin.
6. The seawall protection mortar of claim 1, wherein the preparation method of the chelate water-absorbent resin particles comprises the following steps:
1) adding a chelating agent into clear water, and fully stirring until the chelating agent is completely dissolved to obtain a chelating agent solution;
2) adding water-absorbent resin particles into the chelating agent solution, keeping stirring to enable the chelating agent to be adsorbed on the surfaces of the water-absorbent resin particles, then taking out the water-absorbent resin particles, draining water, and drying to obtain the chelated water-absorbent resin particles.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010424180.1A CN111548090B (en) | 2020-05-19 | 2020-05-19 | Sea wall protection mortar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010424180.1A CN111548090B (en) | 2020-05-19 | 2020-05-19 | Sea wall protection mortar |
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| CN111548090A true CN111548090A (en) | 2020-08-18 |
| CN111548090B CN111548090B (en) | 2022-06-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112851274A (en) * | 2021-01-28 | 2021-05-28 | 中建三局第三建设工程有限责任公司 | High-impermeability cement-based repair mortar with self-sealing crack function and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1515628A (en) * | 1999-12-15 | 2004-07-28 | 株式会社日本触媒 | Water-absorbency resin composition |
| CN105217994A (en) * | 2015-10-29 | 2016-01-06 | 江苏苏博特新材料股份有限公司 | A kind of preparation method of starch base hydration heat of cement controlled material |
| CN106928607A (en) * | 2017-02-28 | 2017-07-07 | 江苏伊莱凯美新材料科技有限公司 | A kind of super absorbent resin oil/fat composition that can control water swelling time and its application |
| CN107010870A (en) * | 2017-03-30 | 2017-08-04 | 浙江鲁班建材科技股份有限公司 | Overlay expansion self-closed type waterproof roll particulate matter and preparation method thereof |
| CN110835249A (en) * | 2019-11-29 | 2020-02-25 | 浙江大学 | Ocean engineering rust-resisting and anti-cracking mortar and preparation and use methods thereof |
-
2020
- 2020-05-19 CN CN202010424180.1A patent/CN111548090B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1515628A (en) * | 1999-12-15 | 2004-07-28 | 株式会社日本触媒 | Water-absorbency resin composition |
| CN105217994A (en) * | 2015-10-29 | 2016-01-06 | 江苏苏博特新材料股份有限公司 | A kind of preparation method of starch base hydration heat of cement controlled material |
| CN106928607A (en) * | 2017-02-28 | 2017-07-07 | 江苏伊莱凯美新材料科技有限公司 | A kind of super absorbent resin oil/fat composition that can control water swelling time and its application |
| CN107010870A (en) * | 2017-03-30 | 2017-08-04 | 浙江鲁班建材科技股份有限公司 | Overlay expansion self-closed type waterproof roll particulate matter and preparation method thereof |
| CN110835249A (en) * | 2019-11-29 | 2020-02-25 | 浙江大学 | Ocean engineering rust-resisting and anti-cracking mortar and preparation and use methods thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112851274A (en) * | 2021-01-28 | 2021-05-28 | 中建三局第三建设工程有限责任公司 | High-impermeability cement-based repair mortar with self-sealing crack function and preparation method thereof |
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| CN111548090B (en) | 2022-06-10 |
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Inventor after: Xiang Chenye Inventor after: Xu Jiacheng Inventor after: Zeng Jiayun Inventor after: Zeng Yuyang Inventor after: Zeng Xin Inventor after: Xiang Xiaorui Inventor before: Chen Xihui Inventor before: Fu Bin Inventor before: Zeng Jiayun Inventor before: Zeng Yuyang Inventor before: Zeng Xin Inventor before: Xiang Xiaorui |
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