CN111253129A - Preparation method of seawater calcareous sand basalt fiber cement-based composite material - Google Patents
Preparation method of seawater calcareous sand basalt fiber cement-based composite material Download PDFInfo
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- CN111253129A CN111253129A CN202010105547.3A CN202010105547A CN111253129A CN 111253129 A CN111253129 A CN 111253129A CN 202010105547 A CN202010105547 A CN 202010105547A CN 111253129 A CN111253129 A CN 111253129A
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- seawater
- calcareous sand
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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
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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
- C04B2111/24—Sea water resistance
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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
- C04B2111/74—Underwater applications
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- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a preparation method of a seawater calcareous sand basalt fiber cement-based composite material, which comprises the following steps: 1) treatment of seawater: adding 10 g of sulfate reducing bacteria into each liter of seawater; 2) reinforcing calcareous sand: firstly, putting calcareous sand into seawater, and then adding anhydrous calcium chloride; secondly, adding urea and stirring uniformly; thirdly, adding the pasteurella bacillus powder and stirring uniformly; 3) etching basalt fibers: firstly, fermenting carbohydrate by lactic acid bacteria to generate lactic acid; secondly, putting the basalt fiber into lactic acid to be soaked for 48 hours; 4) mixing the seawater treated in the step 1), the calcareous sand reinforced in the step 2) and the basalt fiber etched in the step 3) with the portland cement uniformly, and curing to obtain the cement-based composite material. The preparation method of the cement-based composite material provided by the invention can be used for preparing the cement-based composite material with higher quality by locally using materials in the areas with deficient data and higher transportation cost, such as islands.
Description
Background
Nowadays, the construction of islands in the world is in the vogue, particularly China invests huge investment in constructing islands in the open sea in recent years, the islands are far away, high-quality materials required for construction are deficient, particularly various raw materials of cement-based materials can be only conveyed outside, the cost is extremely high if the raw materials are conveyed from the continent, local materials can be improved at low cost, and a large amount of cost can be saved if the raw materials are locally obtained.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of a seawater calcareous sand basalt fiber cement-based composite material, which can improve the material on site in a low-cost mode to form a high-quality cement-based composite material.
Therefore, the preparation method of the seawater calcareous sand basalt fiber cement-based composite material provided by the invention comprises the following steps:
1) treatment of seawater: adding 10 g of sulfate reducing bacteria into each liter of seawater, uniformly stirring, and reacting sulfate ions in the seawater by the sulfate reducing bacteria to generate hydrogen sulfide gas;
2) reinforcing calcareous sand: firstly, putting calcareous sand into seawater, and then adding anhydrous calcium chloride to adjust the concentration of calcium ions in the seawater to 0.5-1.3 mol/L; secondly, adding urea and stirring uniformly; thirdly, adding the pasteurella bacillus powder, uniformly stirring, and standing for 24 hours;
3) etching basalt fibers: firstly, fermenting carbohydrate by lactic acid bacteria to generate lactic acid; secondly, putting the basalt fiber into lactic acid to be soaked for 48 hours;
4) mixing the seawater treated in the step 1), the calcareous sand reinforced in the step 2) and the basalt fiber etched in the step 3) with portland cement uniformly to obtain seawater calcareous sand basalt fiber cement slurry, and curing to obtain the cement-based composite material.
Further, the gas released in step 1) is passed into a sodium hydroxide solution.
Further, the seawater in the step 2) per liter contains 60g of urea, 20g of pasteurella bacteria powder and 1000g of calcareous sand.
Further, a seawater treatment tank is configured in the step 1), the seawater treatment tank is provided with a first water pump connected with seawater through a water delivery pipe, the seawater is delivered into the seawater treatment tank through the water delivery pipe by a seawater delivery pump, and the sulfate reducing bacteria are directly thrown into the seawater treatment tank; the step 2) is provided with a calcareous sand reinforcing pool, the calcareous sand reinforcing pool is connected with a seawater treatment pool through an intermediate pipeline, an electric control valve for controlling opening and closing and a second water pump are arranged on the intermediate pipeline, the calcareous sand reinforcing pool firstly extracts treated seawater from the seawater treatment pool, secondly, calcareous sand is thrown into the calcareous sand reinforcing pool, and thirdly, anhydrous calcium chloride is thrown into the calcareous sand reinforcing pool; then, urea is put into the calcareous sand reinforcing pool; then, adding bacillus pasteurii powder into the calcareous sand reinforcing pool; the step 3) is provided with a basalt fiber etching pool, lactic acid bacteria and carbohydrate are put into the basalt fiber etching pool, and after the lactic acid bacteria ferment the carbohydrate to generate lactic acid, the basalt fiber is put into the lactic acid in the basalt fiber etching pool; and 4) configuring a mixing and stirring tank, wherein the mixing and stirring tank is directly connected with the seawater treatment tank through an intermediate pipeline, a valve for controlling opening and closing and a third water pump are arranged at the position of the intermediate pipeline, the third water pump conveys the treated seawater to the mixing and stirring tank, the calcareous sand in the calcareous sand reinforcing tank is directly grabbed and thrown into the mixing and stirring tank by adopting an excavator, the basalt fiber in the basalt fiber etching tank is directly grabbed and thrown into the mixing and stirring tank by adopting the excavator, and finally, silicate cement and stones are thrown into the mixing and stirring tank.
Further, lactic acid bacteria ferment the carbohydrates including glucose or fructose or lactose, and the lactic acid bacteria include lactobacillus bulgaricus (lactobacillus-lactobacillus) which produces D-type lactic acid by homolactic fermentation using glucose or fructose or lactose.
The invention provides the following technical effects:
1) sulfate reducing bacteria convert sulfate ions (SO) in seawater4 2-) Reduction to hydrogen sulfide (H)2S) gas is released, thereby reducing sulfate ions (SO) in seawater4 2-) Damage to the cement body.
2) The calcareous sand has porous surface and low compactness, and the main component of the calcareous sand is calcium carbonate. In the soaking process, the pasteurella bacillus hydrolyzes urea to generate carbonate, reacts with calcium ions to generate calcium carbonate, and fills the surface of the calcareous sand to ensure that the calcareous sand is compact and the strength is increased.
3) Because the basalt fiber contains calcium oxide, magnesium oxide and the like, and reacts with lactic acid to generate soluble and insoluble lactate, the surface of the fiber is rough (raised or concave), the surface bonding force with common silicate cement slurry is improved, and the fiber has good tensile property.
4) The performances of the seawater, the calcareous sand and the basalt fiber which can be obtained by the island are greatly improved after the improvement, and the seawater calcareous sand basalt fiber cement-based composite material prepared by adopting the seawater calcareous sand basalt fiber cement-based composite material can obtain good performances.
Drawings
Fig. 1 is a schematic structural view of a preparation system used in the preparation method of the seawater calcareous sand basalt fiber cement-based composite material of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are provided for illustration only and are not intended to limit the invention.
Referring to fig. 1, the preparation method of the seawater calcareous sand basalt fiber cement-based composite material provided by the invention comprises the following steps:
1) treatment of seawater: adding 10 g of sulfate reducing bacteria into each liter of seawater, stirring uniformly, and adding sulfate ions (SO) in the seawater by the sulfate reducing bacteria4 2-) Reaction to produce hydrogen sulfide (H)2S) gas; wherein the released gas is passed into a sodium hydroxide solution to form sodium sulfide (Na)2S) solution, reduction of hydrogen sulfide (H)2S) pollution of gas and reduction of sulfate ions (SO) in seawater4 2-) Damage to the cement body.
2) Reinforcing calcareous sand: firstly, putting calcareous sand into seawater, wherein the seawater contains calcium and magnesium ions, and then adding anhydrous calcium chloride to adjust the concentration of the calcium ions in the seawater to 0.5-1.3 mol/L; secondly, adding urea and stirring uniformly; thirdly, adding the pasteurella bacillus powder, uniformly stirring, and standing for 24 hours; wherein the content of urea in seawater is 60g/L, and the content of the Paenibacillus pasteurianus in seawater is 20 g/L.
3) Etching basalt fibers: firstly, fermenting carbohydrate by lactic acid bacteria to generate lactic acid; secondly, putting the basalt fiber into lactic acid to be soaked for 48 hours;
4) mixing the seawater treated in the step 1), the calcareous sand reinforced in the step 2) and the basalt fiber etched in the step 3) with portland cement uniformly to obtain seawater calcareous sand basalt fiber cement slurry, and curing to obtain the cement-based composite material.
Referring to fig. 1, the preparation method of the invention is carried out in a seawater treatment tank 1, a calcareous sand reinforcing tank 2, a basalt fiber etching tank 3 and a mixing and stirring tank 4, wherein the step 1) is to configure the seawater treatment tank 1, the seawater treatment tank 1 is configured with a first water pump 6 connected with seawater through a water conveying pipe 5, the seawater is conveyed into the seawater treatment tank 1 through the water conveying pipe 5 by a seawater conveying pump, and the sulfate reducing bacteria are directly thrown into the seawater treatment tank 1; the step 2) is provided with a calcareous sand reinforcing tank 2, the calcareous sand reinforcing tank 2 is connected with a seawater treatment tank 1 through an intermediate pipeline, an electric control valve for controlling opening and closing and a second water pump 8 are arranged on the intermediate pipeline, the calcareous sand reinforcing tank 2 firstly extracts treated seawater from the seawater treatment tank, secondly, calcareous sand is added into the calcareous sand reinforcing tank 2, and thirdly, anhydrous calcium chloride is added into the calcareous sand reinforcing tank; then, urea is put into the calcareous sand reinforcing pool; then, adding the pasteurella bacillus powder into the calcareous sand reinforcing pool 2; the step 3) is to configure a basalt fiber etching pool 3, and add lactic acid bacteria and carbohydrates into the basalt fiber etching pool 3, wherein the carbohydrates comprise glucose or fructose or lactose through lactic acid bacteria fermentation, the lactic acid bacteria comprise lactobacillus bulgaricus (lactobacillus-lactobacillus) and perform homolactic fermentation by utilizing the glucose or the fructose or the lactose to generate D-type lactic acid, and after the lactic acid bacteria ferment the carbohydrates to generate lactic acid, the basalt fiber is put into the lactic acid of the basalt fiber etching pool 3; and 4) configuring a mixing and stirring tank 4, wherein the mixing and stirring tank 4 is directly connected with the seawater treatment tank 1 through an intermediate pipeline, a valve for controlling opening and closing and a third water pump 9 are arranged at the position of the intermediate pipeline, the third water pump 9 conveys the treated seawater to the mixing and stirring tank 4, the calcareous sand in the calcareous sand reinforcing tank 2 is directly grabbed and thrown into the mixing and stirring tank 4 by adopting an excavator, the basalt fiber in the basalt fiber etching tank 3 is directly grabbed and thrown into the mixing and stirring tank 4 by adopting the excavator, and then silicate cement and stones are thrown into the mixing and stirring tank 4 finally for constructing wave dams, surrounding guardrails, sea island foundations, wharfs, sea island underground spaces and the like.
Claims (9)
1. A preparation method of a seawater calcareous sand basalt fiber cement-based composite material is characterized by comprising the following steps of: the method comprises the following steps:
1) treatment of seawater: adding 10 g of sulfate reducing bacteria into each liter of seawater, uniformly stirring, and reacting sulfate ions in the seawater by the sulfate reducing bacteria to generate hydrogen sulfide gas;
2) reinforcing calcareous sand: firstly, putting calcareous sand into seawater, and then adding anhydrous calcium chloride to adjust the concentration of calcium ions in the seawater to 0.5-1.3 mol/L; secondly, adding urea and stirring uniformly; thirdly, adding the pasteurella bacillus powder, uniformly stirring, and standing for 24 hours;
3) etching basalt fibers: firstly, fermenting carbohydrate by lactic acid bacteria to generate lactic acid; secondly, putting the basalt fiber into lactic acid to be soaked for 48 hours;
4) mixing the seawater treated in the step 1), the calcareous sand reinforced in the step 2) and the basalt fiber etched in the step 3) with portland cement uniformly to obtain seawater calcareous sand basalt fiber cement slurry, and curing to obtain the cement-based composite material.
2. The method for preparing the seawater calcareous sand basalt fiber cement-based composite material as claimed in claim 1, which is characterized in that: introducing the gas released in step 1) into a sodium hydroxide solution.
3. The method for preparing the seawater calcareous sand basalt fiber cement-based composite material according to claim 1 or 2, which is characterized in that: the seawater in the step 2) contains 60g of urea, 20g of pasteurella bacteria powder and 1000g of calcareous sand per liter.
4. The method for preparing the seawater calcareous sand basalt fiber cement-based composite material according to claim 1 or 2, which is characterized in that: the method comprises the following steps that 1) a seawater treatment pool is configured, the seawater treatment pool is provided with a first water pump connected with seawater through a water delivery pipe, the seawater is delivered into the seawater treatment pool through a seawater delivery pump through the water delivery pipe, and sulfate reducing bacteria are directly thrown into the seawater treatment pool; the step 2) is provided with a calcareous sand reinforcing pool, the calcareous sand reinforcing pool is connected with a seawater treatment pool through an intermediate pipeline, an electric control valve for controlling opening and closing and a second water pump are arranged on the intermediate pipeline, the calcareous sand reinforcing pool firstly extracts treated seawater from the seawater treatment pool, secondly, calcareous sand is thrown into the calcareous sand reinforcing pool, and thirdly, anhydrous calcium chloride is thrown into the calcareous sand reinforcing pool; then, urea is put into the calcareous sand reinforcing pool; then, adding bacillus pasteurii powder into the calcareous sand reinforcing pool; the step 3) is provided with a basalt fiber etching pool, lactic acid bacteria and carbohydrate are put into the basalt fiber etching pool, and after the lactic acid bacteria ferment the carbohydrate to generate lactic acid, the basalt fiber is put into the lactic acid in the basalt fiber etching pool; and 4) configuring a mixing and stirring tank, wherein the mixing and stirring tank is directly connected with the seawater treatment tank through an intermediate pipeline, a valve for controlling opening and closing and a third water pump are arranged at the position of the intermediate pipeline, the third water pump conveys the treated seawater to the mixing and stirring tank, the calcareous sand in the calcareous sand reinforcing tank is directly grabbed and thrown into the mixing and stirring tank by adopting an excavator, the basalt fiber in the basalt fiber etching tank is directly grabbed and thrown into the mixing and stirring tank by adopting the excavator, and finally, silicate cement and stones are thrown into the mixing and stirring tank.
5. The method for preparing the seawater calcareous sand basalt fiber cement-based composite material as claimed in claim 3, which is characterized in that: the method comprises the following steps that 1) a seawater treatment pool is configured, the seawater treatment pool is provided with a first water pump connected with seawater through a water delivery pipe, the seawater is delivered into the seawater treatment pool through a seawater delivery pump through the water delivery pipe, and sulfate reducing bacteria are directly thrown into the seawater treatment pool; the step 2) is provided with a calcareous sand reinforcing pool, the calcareous sand reinforcing pool is connected with a seawater treatment pool through an intermediate pipeline, an electric control valve for controlling opening and closing and a second water pump are arranged on the intermediate pipeline, the calcareous sand reinforcing pool firstly extracts treated seawater from the seawater treatment pool, secondly, calcareous sand is thrown into the calcareous sand reinforcing pool, and thirdly, anhydrous calcium chloride is thrown into the calcareous sand reinforcing pool; then, urea is put into the calcareous sand reinforcing pool; then, adding bacillus pasteurii powder into the calcareous sand reinforcing pool; the step 3) is provided with a basalt fiber etching pool, lactic acid bacteria and carbohydrate are put into the basalt fiber etching pool, and after the lactic acid bacteria ferment the carbohydrate to generate lactic acid, the basalt fiber is put into the lactic acid in the basalt fiber etching pool; and 4) configuring a mixing and stirring tank, wherein the mixing and stirring tank is directly connected with the seawater treatment tank through an intermediate pipeline, a valve for controlling opening and closing and a third water pump are arranged at the position of the intermediate pipeline, the third water pump conveys the treated seawater to the mixing and stirring tank, the calcareous sand in the calcareous sand reinforcing tank is directly grabbed and thrown into the mixing and stirring tank by adopting an excavator, the basalt fiber in the basalt fiber etching tank is directly grabbed and thrown into the mixing and stirring tank by adopting the excavator, and finally, silicate cement and stones are thrown into the mixing and stirring tank.
6. The method for preparing the seawater calcareous sand basalt fiber cement-based composite material according to claim 1 or 2, which is characterized in that: fermenting the carbohydrates including glucose or fructose or lactose by lactic acid bacteria including lactobacillus bulgaricus, and performing homolactic fermentation by using glucose or fructose or lactose to generate D-type lactic acid.
7. The method for preparing the seawater calcareous sand basalt fiber cement-based composite material as claimed in claim 3, which is characterized in that: fermenting the carbohydrates including glucose or fructose or lactose by lactic acid bacteria including lactobacillus bulgaricus, and performing homolactic fermentation by using glucose or fructose or lactose to generate D-type lactic acid.
8. The method for preparing the seawater calcareous sand basalt fiber cement-based composite material as claimed in claim 4, wherein the method comprises the following steps: fermenting the carbohydrates including glucose or fructose or lactose by lactic acid bacteria including lactobacillus bulgaricus, and performing homolactic fermentation by using glucose or fructose or lactose to generate D-type lactic acid.
9. The method for preparing the seawater calcareous sand basalt fiber cement-based composite material as claimed in claim 5, which is characterized in that: fermenting the carbohydrates including glucose or fructose or lactose by lactic acid bacteria including lactobacillus bulgaricus, and performing homolactic fermentation by using glucose or fructose or lactose to generate D-type lactic acid.
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