KR100780489B1 - Eco friendly antifungal mortar - Google Patents

Abstract

An environment-friendly antimicrobial mortar is provided to have antibacterial, antifungal, and deodorant characteristics, decompose and remove a polluter of a sick house syndrome, and improve a residential environment. An environment-friendly antimicrobial mortar is obtained by mixing 60-80 wt% of sand with 20-40 wt% of a binder to produce a mixture(a), and blending the mixture(a), effective microorganisms(b), and water(c). The effective microorganism comprises a mixture of one or more selected from photosynthetic bacteria, aerobic bacteria, bioactive materials, yeast, and lactobacilli. The effective microorganism is mixed in an amount of 1-20wt% based on 100 wt% of the water.

Description

Eco-friendly antibacterial mortar {ECO FRIENDLY ANTIFUNGAL MORTAR}

1 is a photograph showing the antimicrobial test results of environmentally friendly antibacterial mortar according to the present invention.

Figure 2 is a graph showing the deodorization test (HCHO) of environmentally friendly antibacterial mortar according to the present invention.

Figure 3a and Figure 3b is a photograph showing the results of the deodorizing test of volatile organic compounds (VOCs) of environmentally friendly antibacterial mortar according to the general mortar and the present invention, respectively.

Figure 4 is a photograph showing the antifungal test results of environmentally friendly antibacterial mortar according to the present invention

Figures 5a and 5b is a mortar construction site improved the cracking and quality of environmentally friendly antibacterial mortar according to the invention and the general mortar, respectively.

Figure 6a and Figure 6b is a photograph of the field core to improve the organization and watertightness of the general mortar and environmentally friendly antibacterial mortar according to the present invention, respectively.

The present invention relates to an eco-friendly antibacterial mortar (Dry Ready Mixed Cement Mortar), more specifically by adding a useful microorganisms (Effective Microorganisms) to the general mortar mixes by providing antibacterial and deodorizing power and anti-fungal properties to the mortar itself After mortar pouring, it removes its own toxicity and blocks harmful microorganisms around the mortar surface with its own purification, antibacterial and deodorizing ability to create a more comfortable indoor environment.In particular, it removes factors such as VOC, HOHC and Toluene. It is about an eco-friendly antibacterial mortar that can relieve sick house syndrome.

In general, mortar (Dry Ready Mixed Cement Mortar) is a mixed design of various standards at the manufacturing plant, and the mixing ratio of dry sand, which is the raw material, and the binder (mixture mainly composed of cement) in the ratio of 2.5-4: 1 It is then delivered to the construction site by a transport vehicle (BULK TRUCK) in a dry state, and mixed with water with a weight ratio of about 12-22%. Quality control of the product is carried out during the delivery process, and the test criteria should be in accordance with the Korean Industrial Standard (K.S). In the quality process test method, water retention, air volume, compressive strength, etc. should meet the test criteria. Specifically, water retention (Wt%) is 65 ~ 75% or more, air volume (Vol%) is 27 or less, and age 28 days compressive strength (N / mm2) should be more than 9 ~ 21. Dry Ready Cement Mortar manufactured through these test standards and mixing process is delivered to the construction site, mixed with water and placed on the floor and wall of the structure.

However, the existing mortars used to date are only simple materials for plastering floors or walls of construction sites, and have no functionality other than plastering materials after hardening and release internal harmful air due to their own toxicity and cracking. The environmental problems are continuously raised.

Mortars generally used are strong alkalis with a Ph of 12.5-13. Hazardous factors such as carbon dioxide (CO ₂ ), ammonia basic gas, and radon (Rn) can cause harmful effects to the indoor environment when hardening raw materials cement. These harmful factors cause sick house syndrome. In particular, the healthy mortar ph is 12-13, but the oxidizing bacteria cannot be activated, but when carbonated under the influence of carbon dioxide and the pH is reduced to 8-9, the dominant oxidizing bacteria multiply first, and the surface ph is lowered to proliferate the sulfated bacteria. In this case, the aerobic sulfated bacterium tiobacillus tiooxidance is actively active to produce sulfuric acid, and in particular, since sulfuric acid is a strong acid, mortar cement is dissolved by neutralization reaction and the strength of mortar decreases. There is. In addition, when sulfate ions move inside and become supersaturated, monosulfate is converted into ethringite, which roughens the hardened structure of cement, generates cracks, accelerates the invasion of corrosive substances, and shortens the lifespan. There are many problems such as worsening the environment.

The present invention is to solve the above problems, by providing antibacterial activity, decomposition and deodorization, anti-fungal properties to the mortar itself by blocking the source of harmful microorganisms such as bacteria, bacteria around the mortar pour surface to create a more comfortable indoor environment The purpose of the present invention is to provide an eco-friendly antibacterial mortar that can dramatically improve the living environment by decomposing and removing the causes of sick house syndrome such as volatile organic compounds (VOCs), formate (HOHC) and toluene.

Another object of the present invention is to inhibit the formation of sulfuric acid after curing mortar in addition to environmentally friendly conditions to prevent stiffness of the mortar to increase the strength and to improve the durability and water tightness to significantly reduce dry shrinkage cracking and settlement cracking, etc. To extend the life of the structure and to further improve the quality and reliability of the product.

Eco-friendly antibacterial mortar according to the present invention for achieving the above object is characterized in that the mixture of sand, binder, water and useful microbial group.

In addition, the present invention may be made by further mixing the admixture.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

Eco-friendly antibacterial mortar according to the present invention is a cultured by mixing an appropriate amount of the effective microorganisms with water (water used) prior to placing in a dry cement mortar prepared in general, specifically, the mortar as a whole 60 to 80 weight% of dry sand and 20 to 40 weight% of binder are mixed with respect to 100 weight%. 12 to 22 parts by weight of water (water used) is mixed with respect to 100 parts by weight of the total mortar of such a composition. 1 to 20% by weight of 100% by weight of water (used water) is replaced with useful microorganisms and mixed and cultured.

And, if necessary, 0.01 to 10 parts by weight of the admixture may be mixed with respect to 100 parts by weight of the total binder.

The dry sand according to the embodiment of the present invention is sand dried in a dryer of a manufacturing plant, and the content of sand (Wt%) (0.15 m / m sieve fraction) is 75 to 82% or less and the maximum size of sand (m / m) 95% (Wt%) or more pass through 4.0 ~ 5.6% 100 (Wt%) or more pass through 4.75 ~ 6.7%.

In the case of the sand is mixed with the binder in a dry state in the factory and transported to the site, and is poured into the structure as a dough mixed with water and useful microorganisms before pouring.

The binder according to an embodiment of the present invention is a mixture of one or more selected from cement, fly ash, shrinkage reducing agent (expansive agent), gypsum (lime) in a proportion according to the formulation and test specifications.

In the case of such a binder, if less than 20% by weight of the total weight of the dry cement mortar is mixed, it may cause deterioration of the integrity, such as the strength of the mortar, and when it exceeds 40% by weight, the mortar strength increases, but temperature cracking occurs due to heat of hydration. Can affect.

The admixture may be used as a mixture of air entrainer, thickener, glidant, and characteristic improving agent according to the item-specific use and test specifications.

Effective Microorganisms are a mixture of one or more bacteria selected from photosynthetic bacteria, lactic acid bacteria, aerobic bacteria, yeasts, and physiologically active substances.The mixed amount is water (used in appropriate proportions according to the item and test standard). 1-20% by weight of 100% of the total weight is mixed and cultured instead of water.

At this time, the mixed amount of the useful microbial group is within the limited numerical range as a ratio with respect to the total weight of water (used water) used in the dry cement mortar dough, but by reducing the amount of water mixed in the mortar by the amount of the mixed mortar Ensure that the total weight and volume are always constant and maintain a constant workability. If the useful microbial group is substituted by 20% by weight or more with respect to 100% by weight of water, the amount of water used is reduced by the amount of the microbial group, and the physical properties are disadvantageous. When the amount is less than 1% by weight, the effect by the microbial group is insufficient. Therefore, the microbial group is cultured by mixing 1 to 20% by weight of 100% of the total weight of water (used water).

Hereinafter, the configuration and features of the present invention will be described in more detail with reference to various embodiments.

Example 1

The dry cement mortar standard (item) is used for flooring, and the mixing standard is set to 2.6: 1 by weight ratio of dry sand and binder, and the binder is 68% by weight of cement and 100% by weight of the binder. Weight percent and shrinkage reducing agent 18 weight percent.

That is, 720 kg of dry sand per 1TON, 190 kg of cement, 40 kg of fly ash, and 50 kg of shrinkage reducing agent are mixed, and then 0.02 kg of a thickener is further mixed with an admixture, and then useful microorganisms are substituted for water. That is, the amount of pure water used is 112 kg to 157 kg minus the mixed weight (13-18 kg) of the useful microorganisms.

The total amount of water used for 1 ton of mortar is 125 ~ 175kg, and the useful microbial group is mixed with water by pouring 13 ~ 18kg of water. In other words, the amount of pure water used is 112-157 kg, subtracting the mixed weight (13-18 kg) of the useful microbial group.

Table 1 and Table 2 below show the experimental results comparing the test results according to Example 1 of the present invention with PLA mortars before mixing useful microorganisms.

[Table 1] Anti-microbial mortar SLUMP FLOW change over time (for floor)

[Table 2] Eco-friendly antibacterial mortar test DATA SHEET

Example 2

The standard (item) of the dry cement mortar is used for general plastering, and the blending standard is set to a ratio of dry sand to binder content of 2.6: 1, and the binder is 93% by weight of cement and 100% by weight of the binder. By weight percent.

That is, 720 kg of dry sand, 260 kg of cement, and 20.0 kg of fly ash are mixed per ton, and 0.133 kg of thickener is mixed with the admixture, and 10% of the total weight of water together with water is added to it before pouring in the field. do.

The total amount of water used for 1 ton of mortar is 125-175 kg, and 13-18 kg of useful microorganisms are mixed with water and poured. At this time, the amount of water used is 112 ~ 157kg minus the mixed weight of useful microorganisms.

Table 3 and Table 4 below show the experimental results comparing the test results according to Example 2 of the present invention with PLA (mortar) before mixing of useful microorganisms.

[Table 3] Antimicrobial mortar SLUMP FLOW change over time

[Table 4] Eco-friendly antibacterial mortar test DATA SHEET

Example 3

Dry cement and mortar are used for plastering, and the mixing standard is set to 1.5: 1 of dry sand and binder amount, and binder is 63% by weight of cement and 32% by weight of fly ash. %, 5% by weight of expanding agent, and 3.7% by weight of admixture. That is, the binder is a mixture of cement, fly ash, expanding agent, admixture.

600 kg of dry sand, 252 kg of cement, 128 kg of fly ash, 20 kg of expanding agent, and 14.8 kg of admixture are mixed per ton, and 10% by weight of 100% by weight of water is replaced with useful microorganisms in the field.

The total amount of water used for 1 ton of mortar is 175 to 225 kg, and 18 to 23 kg of useful microorganisms are replaced with water and mixed with water. That is, pure water is 157-202 kg which subtracted the mixed weight (18-23 kg) of useful microorganisms.

Table 5 and Table 6 below show the experimental results of comparing the test results according to Example 3 of the present invention with PLA mortars before mixing of useful microorganisms.

[Table 5] Antimicrobial mortar SLUMP FLOW change over time (for spraying plastering)

[Table 6] Eco-friendly antibacterial mortar test DATA SHEET

Example 4

The dry cement mortar standard (item) is applied as a formula, and the blending standard is set to a ratio of dry sand to binder content of 1: 4, and the binder is mixed with 90% by weight of cement and 10% by weight of fly ash based on 100% by weight of the total binder. do.

800kg of dry sand per 1TON, 180kg of cement, 20kg of fly ash, 200g of air entrainer with admixture, and 10% by weight of total water together with water are added to the microorganisms in place. That is, the total amount of water used for 1 ton of mortar is 125 to 175 kg, and the useful microorganisms are mixed with 13 kg to 18 kg, which is 10% by weight of the total weight of water, together with water. It is 112-157 kg which subtracted (-18 kg).

Table 7 and Table 8 below show the experimental results of comparing the test results according to Example 4 of the present invention with PLA mortars before mixing useful microorganisms.

[Table 7] Antimicrobial mortar SLUMP FLOW change over time

[Table 8] Eco-friendly antibacterial mortar test DATA SHEET

Example 5

The dry cement mortar standard (item) is used for flooring, and the mixing standard is set at a ratio of dry sand and binder amount of 2.6: 1, and the binder is 68% by weight of cement and 14% by weight of fly ash, based on 100% by weight of the total binder. 18 wt% shrinkage reducing agent is mixed.

That is, 720 kg of dry sand per 190 tons, 190 kg of cement, 40 kg of fly ash, 50 kg of shrinkage reducing agent, and 0.02 kg of thickener with admixture, and then 10% by weight of useful microorganisms together with water Replace it instead. When the total amount of water used for 1 ton of mortar is 175kg, the useful microorganisms are mixed with 17.5kg water, which is 10% by weight of water, and the water is poured.The amount of water used is 157.5 minus the mixed weight of useful microorganisms (17.5kg). It is kg.

This test method was conducted to measure the limit of physical property change according to the substitution limit of useful microorganisms, and a dry cement mortar for floor was selected as a representative standard.

Table 9 and Table 10 below show the experimental results of comparing the test results according to Example 5 of the present invention with PLA mortars before mixing useful microorganisms.

[Table 9] Antimicrobial mortar SLUMP FLOW change over time

[Table 10] Eco-friendly antibacterial mortar test DATA SHEET

Looking at the test results through Comparative Example 1 to 5, the environmentally friendly antimicrobial mortar is more water-resistant than general mortar to prevent the initial dry shrinkage crack after construction, and the SLUMP FLOW appears high even under the same water (usage) use conditions It showed that workability improved a lot because of low LOSS.

The compressive strength was also improved by about 10 to 30% compared to the general mortar, which proved to be superior to the general mortar.

Looking at the test result value through the comparative example, it can be seen that as shown in Example 5, if the useful microbial substitution rate exceeds 20%, a problem of deterioration is caused.

Specifically, over 20% of useful microorganisms have high SLUMP FLOW and delayed curing and curing, as shown in the change over time, causing problems in construction. This causes mortar delay due to higher mortar water retention than the specified value, and causes the strength deterioration to W / M ratio more than the specified value. On the contrary, there is a problem that mortar performance is deteriorated. . Therefore, it is preferable that the substitution amount of the useful microorganism according to the embodiment of the present invention is appropriately substituted according to the mixing amount of raw materials and sub-materials according to the compounding standard within the range of 1% to 20% by weight of water (water used). . On the other hand, based on the effect of the physical property test through Example 1 to Example 5 described above to collect the specimen to analyze the environmental performance of the present invention was carried out an environmental evaluation test.

Specimens (test specimens) were 100m / m standard specimens as the on-site core standard and tested after 28 days of age.The test items were antimicrobial, deodorant (HCHO, VOCs), anti-fungal and crack initiation tests.The results are shown in the table below. 11 to Table 15. Here, BLANK refers to general mortar without mixing useful microorganisms.

Table 11 Antibacterial Test

Table 12: Formate (HCHO) deodorization test

[Table 13] Deodorization test of volatile organic compounds (VOCs)

Test Method (This test is an eco-friendly test result of the present invention conducted by Seoul National University)

1.Put the specimen into the VOCs generating container and seal

2. Generate VOCs for 12 hours at 60 ℃

3. Adsorption of VOCs generated in adsorption tube

4. Analysis of VOCs using GC-MS

Table 14 Antifungal Test

[Table 15] Antibacterial mortar cracking test

This test is a test result that checks the state of cracks of general mortar and antibacterial mortar represented by random selection of many casting sites.

As can be seen from Table 11 and the accompanying drawing 1, in the antibacterial test, the initial concentration of Pseudomonas aeruginosa was increased from 424CFU / 40p to 2,912CFU / 40p after 24 hours, but the antimicrobial mortar was 1CFU / 40p, which showed a reduction of 99.8%. The BLANK initial concentration was increased from 401CFU / 40p to 2,775CFU / 40p after 24 hours in P. aeruginosa antibacterial test, but the antibacterial mortar was 1CFU / 40g and showed a strong antimicrobial activity of 99.8%.

In addition, when looking at the results of formaldehyde (HCHO) deodorization test of Figure 12 and Figure 2, the concentration of BLANK after 70 minutes was 70ppm, whereas in the case of antibacterial mortar, the formate (HCHO) concentration was significantly reduced to 24ppm. (65.7% decrease)

In addition, the results of the deodorization test results of volatile organic compounds (VOCs) shown in Table 13 and FIGS. 3A and 3B show that the total generation of volatile organic compounds (VOCs) of BLANK is 219.5 ㎍, whereas the antimicrobial mortar containing useful microorganisms is 7.9 ㎍. The rate of reduction was 96.4%.

It is believed that this can significantly solve the problems caused by sick house syndrome by significantly reducing volatile organic compounds (VOCs) and formate (HCHO).

In addition, the antifungal test results of Table 14 and attached drawing 4 show that the fungal strains disappeared immediately after incubation of the fungal strains. Have

In addition, the results of the antimicrobial mortar cracking test results of Table 15 and FIGS. 5A and 5B show that the cracking rate was 73% lower than that of the general mortar, thereby suppressing cracking and increasing durability of the internal structure and improving workability.

Looking at this point, it can be seen that the eco-friendly antibacterial mortar according to the embodiment of the present invention has excellent eco-friendly ability and productability with both antibacterial and deodorizing ability, physical performance and the like.

6A and 6B are comparisons of the organization and watertightness of the environmentally friendly antimicrobial mortars according to the present invention and the conventional general mortar, respectively, as shown, the quantity of pores of the conventional general mortar of FIG. 6A and the present invention mortar of FIG. 6B. ) Shows a big difference. Through this, the mortar of the present invention can be seen that the tissue is dense, so that the durability is high and the water penetration can be minimized.

As described above, according to the environment-friendly antibacterial mortar according to the present invention, by culturing the effective microorganisms (Effective Microorganisms) in the mortar can improve the product quality and quality of the mortar.

In addition, due to its strong antibacterial and deodorizing ability and anti-fungal ability, the interior and exterior structures of apartments, etc. can be improved in an eco-friendly way, and the indoor environment can be drastically improved to solve the sick house syndrome.

In addition, the present invention can be mass-produced in a general production method in a general dry cement mixed mortar manufacturing company, it is used only by mixing with water (water used) when mixing before pouring in construction sites The method is also the same as the existing method, there is no problem in construction at all, and has improved workability and workability.

In addition, it has the effect of preventing the oxidation decay of the structure by the antioxidant action, strengthening the watertightness and durability of the structure structure and extending the life of the internal structure by preventing the crack.

Claims (5)

delete A useful microbial group (b) is mixed and cultured together with water (c) to the mixture (a) in which 60 to 80% by weight of sand and 20 to 40% of binder are mixed with respect to 100% by weight of the total weight, The useful microorganism group is a mixture of photosynthetic bacteria, aerobic bacteria, physiologically active substances, yeast, lactic acid bacteria is made of one or more, characterized in that 1 to 20% by weight substitution culture based on 100% by weight of the total water Eco-friendly antibacterial mortar. delete delete delete

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