CN112551964B - Antibacterial cement mortar and preparation and application methods thereof - Google Patents
Antibacterial cement mortar and preparation and application methods thereof Download PDFInfo
- Publication number
- CN112551964B CN112551964B CN202110056602.9A CN202110056602A CN112551964B CN 112551964 B CN112551964 B CN 112551964B CN 202110056602 A CN202110056602 A CN 202110056602A CN 112551964 B CN112551964 B CN 112551964B
- Authority
- CN
- China
- Prior art keywords
- antibacterial
- cement mortar
- tap water
- quartz sand
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
-
- 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
- C04B2111/2092—Resistance against biological degradation
Abstract
The invention relates to antibacterial cement mortar and a preparation method and an application method thereof, wherein the antibacterial cement mortar comprises the following raw materials in parts by weight: 9.5-14 parts of cement, 0.5-1 part of metakaolin, 25-48 parts of quartz sand, 0.01-0.03 part of an antibacterial agent and 5-9 parts of deionized water; the invention selects different nano photocatalytic materials to be mixed as the antibacterial main material for ensuring the stability of the antibacterial effect; the antibacterial agent is respectively attached to the surface of quartz sand, dispersed in cement and deionized water, and then the antibacterial agent, the cement and the deionized water are mixed to prepare antibacterial cement mortar, so that the dispersion unevenness and material loss caused by single-mode doping are reduced, the dispersibility of the antibacterial agent in the cement mortar and the exposure number of reactive active sites are ensured, and the aim of effective antibacterial is fulfilled.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to antibacterial cement mortar and preparation and application methods thereof.
Background
The cement mortar is an engineering material which is prepared by mixing cement, fine aggregate and water as main raw materials and has strength after hardening, and is mainly used for masonry, plastering, decoration engineering and the like. Since cement mortar is exposed to air for a long time, a large amount of bacteria is easily accumulated in the surface layer or cracks thereof. How to effectively relieve the erosion damage of bacteria to the mortar structure has gradually attracted extensive attention of expert scholars. At present, the bactericide is sprayed or coated on the surface of mortar to achieve the bactericidal effect, and the common bactericidal coating comprises a coating doped with the bactericide, a coating doped with a nano photocatalytic material and the like, but the problems in practical application are as follows:
(1) the mortar is exposed to the external environment for a long time, and if the bactericidal coating is directly coated on the surface of the mortar, the service life of the mortar is short, and the mortar is easy to damage or peel off from the surface layer of the mortar; after the film is broken or peeled off, although the film can be repeatedly applied and repaired, resources such as manpower and materials are continuously input, and the maintenance cost is high.
(2) The common bactericide is mostly a chemical preparation, and the bactericide is sprayed on the surface of the cement mortar, so that certain corrosive damage can be caused to the structure of the mortar, and the service life of the cement mortar is influenced; and the application of chemical preparations such as bactericides causes certain pollution to the surrounding environment. In addition, the chemical bactericide can only kill bacteria, but cannot decompose substances such as endotoxin released after death, and the residual substances provide nutrition for new bacteria along with the accumulation of the bacteria again, so that the corrosion damage of the bacteria to the mortar structure is not relieved.
(3) Because the nano photocatalytic material is easy to adsorb and agglomerate, the nano photocatalytic material is directly doped into cement or sand and is difficult to be uniformly mixed with the cement and the sand. Even if the nano photocatalytic material is added after being uniformly dispersed in water, the dispersibility of the nano photocatalytic material cannot be guaranteed, more nano photocatalytic materials remain on the inner wall or the bottom of the container, the material loss is more, a large error is generated on the doping amount of the nano photocatalytic materials, and the sterilization effect in the using process is influenced.
(4) The environment of the cement mortar is generally complex and severe, and the cement mortar is strongly alkaline and has longer cement hydration time. The nanometer photocatalytic material has the problems of reduced photocatalytic performance or structural damage and the like in cement mortar, and if only one nanometer material is adopted for photocatalytic sterilization, once the performance of the nanometer material is inhibited, the photocatalytic effect of the cement mortar is seriously influenced.
Therefore, in order to better exert the antibacterial performance of the nano photocatalytic material and improve the service life of the cement mortar, it is necessary to design an antibacterial cement mortar and preparation and application methods thereof to solve the above problems.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides antibacterial cement mortar and preparation and application methods thereof, which do not influence the durability of the cement mortar and can achieve the effect of long-term effective antibacterial.
In order to achieve the purpose, the invention adopts the following technical scheme: the antibacterial cement mortar comprises the following raw materials in parts by weight: 9.5-14 parts of cement, 0.5-1 part of metakaolin, 25-48 parts of quartz sand, 0.01-0.03 part of an antibacterial agent and 5-9 parts of deionized water; the antibacterial agent consists of an antibacterial main material and an antibacterial auxiliary material; the antibacterial main material is the equal mass combination of nano titanium dioxide, nano graphite phase carbon nitride and nano zirconium dioxide; the antibacterial auxiliary material is any one of nano hexagonal boron nitride, nano silicon dioxide and nano calcium carbonate.
The weight ratio of the antibacterial main material to the antibacterial auxiliary material is 1: 0.1-0.3.
The preparation of the antibacterial agent comprises the following steps: simultaneously adding the antibacterial main material and the antibacterial auxiliary material into tap water with the volume of 20-45 minutes, ultrasonically dispersing for 20-45 minutes, filtering to remove tap water, and then ball-milling for 1.5-3.5 hours by using a ball mill to uniformly mix to obtain an antibacterial agent; whereinV 1=(50~300)V 2WhereinV 2Is the sum of the stacking volume of the antibacterial main material and the stacking volume of the antibacterial auxiliary material.
The preparation method of the antibacterial cement mortar comprises the following steps:
the method comprises the following steps: dividing the antibacterial agent into three parts by weight, and recording as a first antibacterial agent, a second antibacterial agent and a third antibacterial agent;
step two: uniformly dispersing a first antibacterial agent in tap water to obtain lubricating membrane liquid; volume of said tap waterV 3=(0.4~0.8)V 4WhereinV 4The stacking volume of the quartz sand;
step three: stirring quartz sand, airing on a mesh screen for 25-40 minutes, and then placing in an oven for heating and drying; adding the dried quartz sand into the lubricating film liquid, stirring for 6-10 minutes, pouring into a tray, placing in an oven, heating and drying to enable the antibacterial agent to be attached to the surface of the quartz sand, and obtaining the film-attached quartz sand;
step four: adding the second antibacterial agent, cement and metakaolin into a stirrer, mixing and stirring for 2-4.5 minutes, adding the film-coated quartz sand, and continuously stirring for 1-2 minutes to obtain a composite mixture;
step five: adding the third antibacterial agent into deionized water, and uniformly stirring and dispersing to obtain an antibacterial solution; and pouring the antibacterial liquid into the composite mixture, and stirring for 2-3 minutes to obtain the antibacterial cement mortar.
The temperature of the oven is 80-120 ℃; when the stacking thickness of the dried quartz sand is 3-5 cm, stirring the quartz sand once every 50-70 minutes; the heating and drying time is 160-320 minutes.
The quartz sand stirring and washing is to stir and wash the quartz sand in tap water for 5-8 minutes by adopting a stirring and washing barrel.
The application method of the antibacterial cement mortar comprises the following steps of smearing the antibacterial cement mortar on the surface of the existing masonry structure or concrete structure:
the method comprises the following steps: after blowing and dust removal, spraying tap water to wet the surface of the structure;
step two: after the tap water is sprayed for 10-35 minutes, coating the bonding slurry on the surface of the structure; then uniformly smearing the antibacterial cement mortar on the surface of the structure, wherein the smearing thickness is 15-35 mm; the adhesive slurry comprises the following raw materials in parts by weight: 5 parts of cement, 0.004-0.008 part of antibacterial agent and 2.2-3 parts of deionized water;
step three: and after finishing the painting of the antibacterial cement mortar for 8-12 hours, spraying tap water for curing, timing from the first time of spraying tap water, and spraying tap water every 12 hours, wherein the curing time is not less than 7 days.
The volume of the sprayed tap water is determined according to the temperature of the surface of the structure: the temperature is 5-13.9 ℃, and the volume of sprayed tap water per square meter is 160-220 ml; the temperature is 14-21.9 ℃, and the volume of sprayed tap water per square meter is 220-280 ml; the temperature is 22-27.9 ℃, and the volume of sprayed tap water per square meter is 280-350 ml; the temperature is 28-35 ℃, and the volume of sprayed tap water per square meter is 350-420 ml.
Compared with the prior art, the invention has the beneficial effects that:
1. the nano photocatalytic material is adopted as an antibacterial agent to be doped into the cement mortar, so that the durability of the cement mortar is not influenced, and the antibacterial effect can be achieved for a long time; different nano photocatalytic materials are selected and mixed to serve as an antibacterial main material for ensuring the stability of the antibacterial effect; meanwhile, the antibacterial auxiliary materials are matched, so that the antibacterial main materials are uniformly dispersed in the cement mortar, and the antibacterial effect of the cement mortar is obviously improved.
2. According to the invention, the antibacterial agent is respectively attached to the surface of the quartz sand, dispersed in the cement and the deionized water, and then the three are mixed to prepare the antibacterial cement mortar, so that the dispersion unevenness and material loss caused by single doping are reduced, the dispersibility of the antibacterial agent in the cement mortar is ensured, the exposure number of reactive active sites is ensured, and the aim of effective antibacterial is achieved.
3. According to the invention, the antibacterial agent is attached to the surface of the quartz sand to form a lubricating film, so that the antibacterial agent has good antibacterial and sterilizing effects on bacteria on the contact interface of cement and quartz sand; in addition, the quartz sand is hard and has strong acid-base corrosion resistance; metakaolin can be hydrated with cement to improve the hydration degree of cement; both quartz sand and metakaolin can improve the bacterial erosion resistance of cement mortar.
4. The antibacterial agent adopted by the invention can not only rapidly kill bacteria under the illumination condition, but also decompose lipid substances such as endotoxin released after the bacteria die, effectively relieve the corrosion damage of the bacteria to the mortar structure, and the antibacterial agent can repeatedly play an antibacterial role under the illumination condition.
Detailed Description
The invention provides antibacterial cement mortar and preparation and application methods thereof. In order to further explain the technical means and effects of the present invention, the following detailed description of the present invention is provided in conjunction with the embodiments.
The antibacterial cement mortar in the embodiment comprises the following raw materials in parts by weight: 9.5-14 parts of cement, 0.5-1 part of metakaolin, 25-48 parts of quartz sand, 0.01-0.03 part of an antibacterial agent and 5-9 parts of deionized water;
the antibacterial agent consists of an antibacterial main material and an antibacterial auxiliary material; the antibacterial main material is the equal mass combination of nano titanium dioxide, nano graphite phase carbon nitride and nano zirconium dioxide; the antibacterial auxiliary material is any one of nano hexagonal boron nitride, nano silicon dioxide and nano calcium carbonate.
The weight ratio of the antibacterial main material to the antibacterial auxiliary material is 1: 0.1-0.3.
The preparation of the antibacterial agent comprises the following steps: simultaneously adding the antibacterial main material and the antibacterial auxiliary material into tap water with the volume of 20-45 minutes, ultrasonically dispersing for 20-45 minutes, filtering to remove tap water, and then ball-milling for 1.5-3.5 hours by using a ball mill to uniformly mix to obtain an antibacterial agent; whereinV 1=(50~300)V 2WhereinV 2Is the sum of the stacking volume of the antibacterial main material and the stacking volume of the antibacterial auxiliary material.
The preparation method of the antibacterial cement mortar comprises the following steps:
the method comprises the following steps: dividing the antibacterial agent into three parts by weight, and recording as a first antibacterial agent, a second antibacterial agent and a third antibacterial agent;
step two: uniformly dispersing a first antibacterial agent in tap water to obtain lubricating membrane liquid; volume of said tap waterV 3=(0.4~0.8)V 4WhereinV 4The stacking volume of the quartz sand;
step three: stirring quartz sand, airing on a mesh screen for 25-40 minutes, and then placing in an oven for heating and drying; adding the dried quartz sand into the lubricating film liquid, stirring for 6-10 minutes, pouring into a tray, placing in an oven, heating and drying to enable the antibacterial agent to be attached to the surface of the quartz sand, and obtaining the film-attached quartz sand;
step four: adding the second antibacterial agent, cement and metakaolin into a stirrer, mixing and stirring for 2-4.5 minutes, adding the film-coated quartz sand, and continuously stirring for 1-2 minutes to obtain a composite mixture;
step five: adding the third antibacterial agent into deionized water, and uniformly stirring and dispersing to obtain an antibacterial solution; and pouring the antibacterial liquid into the composite mixture, and stirring for 2-3 minutes to obtain the antibacterial cement mortar.
The quartz sand stirring and washing is to stir and wash the quartz sand in tap water for 5-8 minutes by adopting a stirring and washing barrel.
An application method of antibacterial cement mortar is to paint the antibacterial cement mortar on the surface of an existing masonry structure or a concrete structure, and comprises the following steps:
the method comprises the following steps: after blowing and dust removal, spraying tap water to wet the surface of the structure;
step two: after the tap water is sprayed for 30 minutes, coating the bonding slurry on the surface of the structure; then uniformly smearing the antibacterial cement mortar on the surface of the structure, wherein the smearing thickness is 20 mm; the adhesive slurry comprises the following raw materials in parts by weight: 5 parts of cement, 0.006 part of antibacterial agent and 2.8 parts of deionized water;
step three: and after finishing the coating of the antibacterial cement mortar for 10 hours, spraying tap water for maintenance, timing from the first time of spraying tap water, and spraying tap water every 12 hours, wherein the maintenance time is not less than 7 days.
The volume of the sprayed tap water is determined according to the temperature of the surface of the structure: the temperature is 5-13.9 ℃, and the volume of sprayed tap water per square meter is 200 ml; the temperature is 14-21.9 ℃, and the volume of spraying tap water per square meter is 240 ml; the temperature is 22-27.9 ℃, and the volume of the sprayed tap water per square meter is 300 ml; the temperature is 28-35 ℃, and the volume of the sprayed tap water per square meter is 360 ml.
The particle size of the antibacterial main material is 40-100 nm; the particle size of the antibacterial auxiliary material is 20-50 nm.
The particle size of the quartz sand is 0.25-4.75 mm; the cement is any one of portland cement, ordinary portland cement, slag portland cement and fly ash portland cement; the temperature of the deionized water is 22-28 ℃; the frequency adopted by ultrasonic dispersion is 18-26 kHz. The ball milling rotating speed is 120-200 r/min.
When the quartz sand is 0.4-0.8 times of the stacking volume, the antibacterial agent is favorably dispersed and attached, the heating and drying time can be shortened, and the stirring uniformity of the quartz sand in the lubricating film liquid is not influenced.
The surface of the structure is wetted, and the wetted surface of the structure is coated with the bonding slurry, so that the bonding strength of the antibacterial cement mortar and the structure is increased, and the falling probability of the antibacterial cement mortar is reduced; the maintenance time is calculated from the first start of spraying tap water.
When the surface temperature of the wall is lower than 5 ℃ or higher than 35 ℃, the painting construction of the antibacterial cement mortar is not carried out.
The preparation process of the bonding slurry comprises the following steps: adding the antibacterial agent and cement into a stirrer, uniformly mixing and stirring, and then adding deionized water and stirring for not less than 2 minutes; the painting thickness of the bonding slurry is not more than 3 mm.
The temperature of the oven is 80-120 ℃; when the stacking thickness of the dried quartz sand is 3-5 cm, stirring the quartz sand once every 50-70 minutes; the heating and drying time is 160-320 minutes.
Example 1:
in the embodiment, the antibacterial cement mortar comprises the following raw materials in parts by weight: 11 parts of cement, 0.75 part of metakaolin, 32 parts of quartz sand, 0.015 part of antibacterial agent and 5.5 parts of deionized water;
the antibacterial main material is the equal mass combination of nano titanium dioxide, nano graphite phase carbon nitride and nano zirconium dioxide; the antibacterial auxiliary material is nano hexagonal boron nitride.
In this example, the weight ratio of the antibacterial main material to the antibacterial auxiliary material is 1: 0.15.
In this example, the antibacterial agent was produced by the following steps: simultaneously adding the antibacterial main material and the antibacterial auxiliary material into tap water, performing ultrasonic dispersion for 35 minutes, filtering to remove the tap water, and then performing ball milling for 1.6 hours by using a ball mill to uniformly mix to obtain an antibacterial agent; wherein the volume of the tap water is 100 times of the sum of the accumulation volume of the antibacterial main material and the accumulation volume of the antibacterial auxiliary material.
In the embodiment, the preparation method of the antibacterial cement mortar comprises the following steps:
the method comprises the following steps: dividing the antibacterial agent into three parts by weight, and recording as a first antibacterial agent, a second antibacterial agent and a third antibacterial agent;
step two: uniformly dispersing a first antibacterial agent in tap water to obtain a lubricating membrane liquid; the volume of tap water is 0.45 times of the accumulation volume of the quartz sand;
step three: stirring quartz sand, airing on a mesh screen for 35 minutes, and then placing in an oven for heating and drying at 80-120 ℃; adding the dried quartz sand into the lubricating film liquid, stirring for 7 minutes, pouring into a tray, placing in an oven, heating and drying to make the antibacterial agent adhere to the surface of the quartz sand, and obtaining the film-coated quartz sand;
step four: adding the second antibacterial agent, cement and metakaolin into a stirrer, mixing and stirring for 2.5 minutes, adding the film-coated quartz sand, and continuously stirring for 2 minutes to obtain a composite mixture;
step five: adding the third antibacterial agent into deionized water, and uniformly stirring and dispersing to obtain an antibacterial solution; and pouring the antibacterial liquid into the composite mixture, and stirring for 2 minutes to obtain the antibacterial cement mortar.
Example 2:
in the embodiment, the antibacterial cement mortar comprises the following raw materials in parts by weight: 11 parts of cement, 0.75 part of metakaolin, 32 parts of quartz sand, 0.015 part of antibacterial agent and 5.5 parts of deionized water; the antibacterial main material is the equal mass combination of nano titanium dioxide, nano graphite phase carbon nitride and nano zirconium dioxide; the antibacterial auxiliary material is nano silicon dioxide.
In this example, the weight ratio of the antibacterial main material to the antibacterial auxiliary material is 1: 0.15.
The method for preparing the antibacterial cement mortar of this embodiment is the same as that of embodiment 1.
Example 3:
in the embodiment, the antibacterial cement mortar comprises the following raw materials in parts by weight: 11 parts of cement, 0.75 part of metakaolin, 32 parts of quartz sand, 0.015 part of antibacterial agent and 5.5 parts of deionized water; the antibacterial main material is the equal mass combination of nano titanium dioxide, nano graphite phase carbon nitride and nano zirconium dioxide; the antibacterial auxiliary material is nano calcium carbonate.
In this example, the weight ratio of the antibacterial main material to the antibacterial auxiliary material is 1: 0.15.
The method for preparing the antibacterial cement mortar of this embodiment is the same as that of embodiment 1.
Comparative example 1: the antibacterial agent contains no antibacterial adjuvant
In the comparative example, the antibacterial cement mortar comprises the following raw materials in parts by weight: 11 parts of cement, 0.75 part of metakaolin, 32 parts of quartz sand, 0.015 part of antibacterial agent and 5.5 parts of deionized water; the antibacterial agent is the equal mass combination of nano titanium dioxide, nano graphite phase carbon nitride and nano zirconium dioxide.
The preparation method of the antibacterial cement mortar of the comparative example is the same as that of example 1.
Comparative example 2:
in the comparative example, the antibacterial cement mortar comprises the following raw materials in parts by weight: 11 parts of cement, 0.75 part of metakaolin, 32 parts of quartz sand, 0.015 part of antibacterial agent and 5.5 parts of deionized water; the antibacterial main material is the equal mass combination of nano titanium dioxide, nano graphite phase carbon nitride and nano zirconium dioxide; the antibacterial auxiliary material is nano calcium carbonate.
In the comparative example, the preparation method of the antibacterial cement mortar is carried out according to the following steps:
the method comprises the following steps: adding the cement and the metakaolin into a stirrer, mixing and stirring for 2.5 minutes, adding the quartz sand, and continuously stirring for 2 minutes to obtain a composite mixture;
step two: adding the antibacterial agent into deionized water, and stirring and dispersing to obtain an antibacterial liquid; and pouring the antibacterial liquid into the composite mixture, and stirring for 2 minutes to obtain the antibacterial cement mortar.
Comparative example 3:
in the comparative example, the antibacterial cement mortar comprises the following raw materials in parts by weight: 11 parts of cement, 0.75 part of metakaolin, 32 parts of quartz sand, 0.015 part of antibacterial agent and 5.5 parts of deionized water; the antibacterial main material is the equal mass combination of nano titanium dioxide, nano graphite phase carbon nitride and nano zirconium dioxide; the antibacterial auxiliary material is nano calcium carbonate.
In the comparative example, the preparation method of the antibacterial cement mortar is carried out according to the following steps:
the method comprises the following steps: adding the antibacterial agent, the cement and the metakaolin into a stirrer, mixing and stirring for 2.5 minutes, adding the quartz sand, and continuously stirring for 2 minutes to obtain a composite mixture;
step two: and pouring deionized water into the composite mixture, and stirring for 2 minutes to obtain the antibacterial cement mortar.
Comparative example 4: does not contain an antibacterial agent
In the comparative example, the antibacterial cement mortar comprises the following raw materials in parts by weight: 11 parts of cement, 0.75 part of metakaolin, 32 parts of quartz sand and 5.5 parts of deionized water.
The preparation method of the cement mortar of the comparative example comprises the following steps: adding the cement and the metakaolin into the stirrer, stirring for 2.5 minutes, adding the quartz sand, and continuing stirring for 2 minutes; then adding deionized water and stirring for 2 minutes to obtain cement mortar.
Determination of antibacterial Effect:
according to the raw material ratio and the preparation method of the above examples 1-3 and comparative examples 1-4, cement mortar test pieces with a diameter of 5cm and a thickness of 2cm are respectively prepared. After the test piece is maintained for 28 days, staphylococcus aureus and escherichia coli are used as test bacteria in the test, and the antibacterial effect is measured. The surface of the test piece is disinfected by 75% ethanol solution, and then is washed and soaked by sterile distilled water to constant weight, and then is placed in an ultra-clean transparent box body with constant temperature and constant humidity at 32 ℃ for later use. Respectively taking 1mL of the solution with the concentration of 105The cfu/mL bacterial liquid is inoculated on the surface of each test piece, and a xenon lamp light source is placed right above the test piece for irradiation. After the test piece inoculated with the bacterial liquid is irradiated for 60min, counting by using a microscope, and judging the antibacterial rate of the test piece according to the percentage difference of the colony number of the test piece and the colony number of the comparative example 2ν i ，ν i =(m-m i )/m×100%；mThe number of colonies after the light culture of comparative example 4;m i (i=1,2,3,4,5,6) represents the number of colonies after light culture of example 1, example 2, example 3, comparative example 1, comparative example 2 and comparative example 3, respectively. The calculation results are shown in table 1.
TABLE 1
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can make equivalent changes and modifications within the technical scope of the present invention disclosed by the present invention.
Claims (7)
1. An antibacterial cement mortar is characterized in that: the antibacterial cement mortar comprises the following raw materials in parts by weight: 9.5-14 parts of cement, 0.5-1 part of metakaolin, 25-48 parts of quartz sand, 0.01-0.03 part of an antibacterial agent and 5-9 parts of deionized water; the antibacterial agent comprises an antibacterial main material and an antibacterial auxiliary material; the antibacterial main material is the equal mass combination of nano titanium dioxide, nano graphite phase carbon nitride and nano zirconium dioxide; the antibacterial auxiliary material is any one of nano hexagonal boron nitride, nano silicon dioxide and nano calcium carbonate;
the manufacturing method of the antibacterial cement mortar comprises the following steps:
the method comprises the following steps: dividing the antibacterial agent into three parts by weight, and recording as a first antibacterial agent, a second antibacterial agent and a third antibacterial agent;
step two: uniformly dispersing the first antimicrobial agent in a volume ofV 3Obtaining lubricating membrane liquid from tap water; volume of said tap waterV 3=(0.4~0.8)V 4WhereinV 4The stacking volume of the quartz sand;
step three: stirring quartz sand, airing on a mesh screen for 25-40 minutes, and then placing in an oven for heating and drying; adding the dried quartz sand into the lubricating film liquid, stirring for 6-10 minutes, pouring into a tray, placing in an oven, heating and drying to enable the antibacterial agent to be attached to the surface of the quartz sand, and obtaining the film-attached quartz sand;
step four: adding the second antibacterial agent, cement and metakaolin into a stirrer, mixing and stirring for 2-4.5 minutes, adding the film-coated quartz sand, and continuously stirring for 1-2 minutes to obtain a composite mixture;
step five: adding the third antibacterial agent into deionized water, and uniformly stirring and dispersing to obtain an antibacterial solution; and pouring the antibacterial liquid into the composite mixture, and stirring for 2-3 minutes to obtain the antibacterial cement mortar.
2. The antibacterial cement mortar of claim 1, characterized in that: the weight ratio of the antibacterial main material to the antibacterial auxiliary material is 1: 0.1-0.3.
3. The antibacterial cement mortar of claim 1, characterized in that: the preparation method of the antibacterial agent comprises the following steps: the antibacterial main material and the antibacterial auxiliary material are added into the mixture by the volume V 1 Ultrasonically dispersing the mixture in tap water for 20-45 minutes, filtering to remove the tap water, and then ball-milling the mixture by using a ball mill for 1.5-3.5 hours to uniformly mix the mixture to obtain an antibacterial agent; whereinV 1=(50~300)V 2WhereinV 2Is the sum of the stacking volume of the antibacterial main material and the stacking volume of the antibacterial auxiliary material.
4. The antibacterial cement mortar of claim 1, characterized in that: the temperature of the oven is 80-120 ℃; when the stacking thickness of the dried quartz sand is 3-5 cm, stirring the quartz sand once every 50-70 minutes; the heating and drying time is 160-320 minutes.
5. The antibacterial cement mortar of claim 1, characterized in that: the quartz sand stirring and washing is to stir and wash the quartz sand in tap water for 5-8 minutes by adopting a stirring and washing barrel.
6. The use of the antibacterial cement mortar as claimed in claim 1, wherein: the method for smearing the antibacterial cement mortar on the surface of the existing masonry structure or concrete structure comprises the following steps:
the method comprises the following steps: after blowing and dust removal, spraying tap water to wet the surface of the structure;
step two: after the tap water is sprayed for 10-35 minutes, coating the bonding slurry on the surface of the structure; then uniformly smearing the antibacterial cement mortar on the surface of the structure, wherein the smearing thickness is 15-35 mm; the adhesive slurry comprises the following raw materials in parts by weight: 5 parts of cement, 0.004-0.008 part of antibacterial agent and 2.2-3 parts of deionized water;
step three: and after finishing the painting of the antibacterial cement mortar for 8-12 hours, spraying tap water for curing, timing from the first time of spraying tap water, and spraying tap water every 12 hours, wherein the curing time is not less than 7 days.
7. Use according to claim 6, characterized in that: the volume of the sprayed tap water is determined according to the temperature of the surface of the structure: the temperature is 5-13.9 ℃, and the volume of sprayed tap water per square meter is 160-220 ml; the temperature is 14-21.9 ℃, and the volume of sprayed tap water per square meter is 220-280 ml; the temperature is 22-27.9 ℃, and the volume of sprayed tap water per square meter is 280-350 ml; the temperature is 28-35 ℃, and the volume of sprayed tap water per square meter is 350-420 ml.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110056602.9A CN112551964B (en) | 2021-01-15 | 2021-01-15 | Antibacterial cement mortar and preparation and application methods thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110056602.9A CN112551964B (en) | 2021-01-15 | 2021-01-15 | Antibacterial cement mortar and preparation and application methods thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112551964A CN112551964A (en) | 2021-03-26 |
| CN112551964B true CN112551964B (en) | 2021-11-30 |
Family
ID=75035616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110056602.9A Active CN112551964B (en) | 2021-01-15 | 2021-01-15 | Antibacterial cement mortar and preparation and application methods thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112551964B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104857980A (en) * | 2015-04-21 | 2015-08-26 | 江苏大学 | Preparation method of hexagonal boron nitride ceramic material stable silver carbonate semiconductor |
| CN108546054A (en) * | 2018-07-26 | 2018-09-18 | 北京宝辰联合科技股份有限公司 | Permeable face layer mortar of a kind of high-strength automatically cleaning and preparation method thereof |
| CN109865528A (en) * | 2019-03-13 | 2019-06-11 | 高苑 | A kind of semiconductor light-catalyst material and its processing technology |
| CN110818329A (en) * | 2019-11-15 | 2020-02-21 | 广东特耐石新材料科技有限公司 | Self-cleaning outdoor artificial stone slab and preparation method thereof |
| CN111470814A (en) * | 2020-04-14 | 2020-07-31 | 广东盖特奇新材料科技有限公司 | Antibacterial and disinfectant inorganic high-performance composite fiber material and preparation method thereof |
| CN111517698A (en) * | 2020-04-14 | 2020-08-11 | 佛冈龙清电力器材有限公司 | Self-sterilization composite building material for public health environment and preparation method thereof |
| CN112537937A (en) * | 2021-01-15 | 2021-03-23 | 福州大学 | Antibacterial coarse aggregate and preparation method thereof |
| CN112608074A (en) * | 2021-01-15 | 2021-04-06 | 福州大学 | Antibacterial asphalt concrete and preparation method thereof |
| CN112624709A (en) * | 2021-01-15 | 2021-04-09 | 福州大学 | Antibacterial cement concrete and preparation method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001106607A (en) * | 1999-10-04 | 2001-04-17 | Kubota Corp | Antibacterial agent for preventing concrete/mortar from being deteriorated, and concrete or mortar containing antibacterial agent |
| CN100506927C (en) * | 2005-03-21 | 2009-07-01 | 刘景春 | Method for preparing nano-structural film with straggling effect for multiple substances and use thereof |
| CN104668441A (en) * | 2015-02-04 | 2015-06-03 | 繁昌县金科机电科技有限公司 | Preservative and antibacterial pre-coated sand capable of improving quality of castings and preparation method of pre-coated sand |
| CN105330246A (en) * | 2015-10-29 | 2016-02-17 | 合肥正拓装饰材料有限公司 | Composite water permeable brick having anti-bacterial effect |
| KR102129735B1 (en) * | 2018-04-12 | 2020-07-09 | 한국휴로드(주) | The ondol system of environment-friendly |
| CN112551992B (en) * | 2021-01-15 | 2022-03-11 | 福州大学 | Artificial coarse aggregate with photocatalysis effect and preparation method thereof |
-
2021
- 2021-01-15 CN CN202110056602.9A patent/CN112551964B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104857980A (en) * | 2015-04-21 | 2015-08-26 | 江苏大学 | Preparation method of hexagonal boron nitride ceramic material stable silver carbonate semiconductor |
| CN108546054A (en) * | 2018-07-26 | 2018-09-18 | 北京宝辰联合科技股份有限公司 | Permeable face layer mortar of a kind of high-strength automatically cleaning and preparation method thereof |
| CN109865528A (en) * | 2019-03-13 | 2019-06-11 | 高苑 | A kind of semiconductor light-catalyst material and its processing technology |
| CN110818329A (en) * | 2019-11-15 | 2020-02-21 | 广东特耐石新材料科技有限公司 | Self-cleaning outdoor artificial stone slab and preparation method thereof |
| CN111470814A (en) * | 2020-04-14 | 2020-07-31 | 广东盖特奇新材料科技有限公司 | Antibacterial and disinfectant inorganic high-performance composite fiber material and preparation method thereof |
| CN111517698A (en) * | 2020-04-14 | 2020-08-11 | 佛冈龙清电力器材有限公司 | Self-sterilization composite building material for public health environment and preparation method thereof |
| CN112537937A (en) * | 2021-01-15 | 2021-03-23 | 福州大学 | Antibacterial coarse aggregate and preparation method thereof |
| CN112608074A (en) * | 2021-01-15 | 2021-04-06 | 福州大学 | Antibacterial asphalt concrete and preparation method thereof |
| CN112624709A (en) * | 2021-01-15 | 2021-04-09 | 福州大学 | Antibacterial cement concrete and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| Evaluation of the Antibacterial Activity of a Geopolymer Mortar Based on Metakaolin Supplemented with TiO2 and CuO Particles Using Glass Waste as Fine Aggregate;Mejia-de Gutierrez, Ruby et al;《Coatings》;20200209;第10卷(第2期);第1-16页 * |
| 新型光净化环保功能涂料的研制与开发;戴文新;《福建化工》;20040130(第04期);第21-25页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112551964A (en) | 2021-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111349356B (en) | Interior wall putty with mildew-proof function and preparation method thereof | |
| CN101519901A (en) | External decorative mortar system and construction process thereof | |
| CN108587342A (en) | A kind of nano titanium oxide photocatalysis disinfectant purification coating | |
| CN108795203A (en) | A kind of photocatalysis air-cleaning interior wall coating and preparation method thereof | |
| CN112624709B (en) | Antibacterial cement concrete and preparation method thereof | |
| CN113603427A (en) | Microbial erosion resistant protective concrete and preparation method thereof | |
| CN113912350A (en) | High-quality concrete based on nano bamboo fibers and preparation method thereof | |
| Farmani et al. | pH reduction through amendment of cement mortar with silica fume enhances its biological treatment using bacterial carbonate precipitation | |
| CN113004732A (en) | Formula and preparation method of antibacterial coating | |
| CN112551964B (en) | Antibacterial cement mortar and preparation and application methods thereof | |
| CN106587813B (en) | Multifunction wall material and preparation method thereof | |
| KR102416222B1 (en) | High-absorbable fiber based pill for healing concrete crack having function of controlling crack width and preparing method the same | |
| CN104987104A (en) | Inorganic dry powder paint composition and application method thereof | |
| CN112537937B (en) | Antibacterial coarse aggregate and preparation method thereof | |
| JP2006232870A (en) | Coating solution and its use | |
| CN114436616B (en) | Inorganic exterior wall mildew-proof stone-like paint | |
| CN111548666A (en) | Waterproof and bacteriostatic weakly-alkaline negative oxygen ion putty powder for purifying air and preparation method thereof | |
| CN107265999A (en) | A kind of nano-catalytic sterilizing gypsum ceiling board and preparation method thereof | |
| CN112608074B (en) | Antibacterial asphalt concrete and preparation method thereof | |
| CN114988792A (en) | Preparation method of environment-friendly building material | |
| CN105625666A (en) | Sand beach shell decorative sheet and manufacturing method thereof | |
| CN108822665A (en) | A kind of bactericidal inner wall coating and its construction method | |
| CN106220074B (en) | One kind being used for Marine reinforced concrete structure corrosion-resistant fungicidal paint and its coating processes | |
| CN111298838B (en) | Photocatalyst purifying agent for hydrophobic surface | |
| CN107500613A (en) | A kind of wall surfacing material diatom ooze and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |