KR100595427B1 - The manufacturing method and composition of nonsintering natural hydraulic lime mortar - Google Patents

Abstract

The present invention, with 35 to 65 parts by weight of hydrated lime, 5 to 20 parts by weight of quicklime, 15 to 25 parts by weight of natural calcium carbonate, 25 to 35 parts by weight of natural cement for initial strength correction, natural anhydrous gypsum 1 ~ 5 parts by weight, optionally 0-5 parts by weight of ocher, 0-0.05 parts by weight of natural fiber, 0-0.03 parts by weight of anionic surfactant based on olefin sulfonate for improving workability, is added to the lime powder The present invention relates to a non-plastic natural hydraulic lime mortar composition prepared by mixing aggregate or general quartz sand with a lime powder: aggregate weight ratio of 1: 3 to 1: 5, and a method of manufacturing the same.

Description

The non-plastic natural hydraulic lime mortar composition and its manufacturing method

The present invention relates to a non-plastic, natural hydraulic lime mortar composition as a building material, which is functionally effective for breathability and humidity control, and a method of manufacturing the same.

Lime is a building material that has been used with stone and soil since ancient times, and it has been widely used as an eco-friendly building material because of its breathability and humidity control function.

Lime has been mainly used as interior finishing materials such as stone masonry and soil wall, but its use has been limited due to low strength and cracking.

In order to solve this drawback, Korean Laid-Open Patent Publication (Spec. 2000-0031492) is based on lime, mixed and pulverized silica, clay and the like, and then hydrothermally synthesized for 24 hours at a high temperature of 150 to 250 ° C. to increase strength. Patents for producing reinforced interior and exterior molding materials have been disclosed. In addition, Korean Laid-open Patent Publication (Special 2001-0001814) is characterized in that it contains glass fiber and gypsum in lime, and after forming the slurry into slurry and supplying CO ₂ , applying a heat of 60 ° C. It is a method of manufacturing.

However, the conventional techniques are molded lime building materials which have improved strength under curing conditions under high temperature and high pressure in order to compensate for low strength of lime as a building material, and most of them must be accompanied by heat. There is a problem that is not suitable for applications that must be finished in an irregular shape.

Recently, in Europe, limestone from certain mountain regions is calcined at 1,000 to 1,200 ° C for 3 days to produce natural lime containing hydraulic minerals to compensate for the low strength of lime, but also using a long time calcining process and a specific grade of limestone. It has the disadvantage that it should be done.

In order to solve the above problems, the present invention is used for construction of lime, more specifically, hydrated lime, quicklime, natural calcium carbonate, hydraulic natural cement, natural anhydrous gypsum, loess, natural fiber, anionic surfactant In this way, a non-plastic natural hydraulic lime composition can be prepared by simply drying and mixing without compromising the calcining process, and at the same time, having a unique function of lime. It is a technical object of the present invention to provide an amorphous, non-plastic, natural hydraulic lime mortar composition and a method for preparing the same by mixing sand.

In order to achieve the above object, with 35 to 65 parts by weight of hydrated lime, 5 to 20 parts by weight of quicklime, 15 to 25 parts by weight of natural calcium carbonate, 25 to 35 parts by weight of natural cement for initial strength correction, for minimum variation 1-5 parts by weight of natural anhydrous gypsum, optionally 0-5 parts by weight of ocher, 0-0.05 parts by weight of natural fiber, 0-0.03 parts by weight of anionic surfactant based on olefin sulfonate to improve workability. The present invention relates to a non-plastic natural hydraulic lime mortar composition prepared by mixing feldspar aggregate or ordinary quartz sand with a lime powder: aggregate weight ratio of 1: 3 to 1: 5 in a lime powder and a method of manufacturing the same.

Referring to the manufacturing method of the present invention in detail as follows. Natural cement made of clay limestone for initial strength improvement in 35 ~ 65 parts by weight of hydrated lime, 5 ~ 20 parts by weight of quicklime, 15 ~ 25 parts by weight of natural calcium carbonate 25 to 35 parts by weight, 1 to 5 parts by weight of natural anhydrous gypsum for minimum variation is added to combine the hydraulic lime powder composition, so that the composition is 14 to 25 parts by weight based on the total mortar composition. It is optionally added 0-5 parts by weight of ocher, 0-0.05 parts by weight of natural fiber of straw of 3 cm or less, and 0-0.03 parts by weight of anionic surfactant of olefin sulfonate type for improving workability. 75 to 83 parts by weight of feldspar aggregate or ordinary quartz sand having a particle size distribution of 0.075 to 4.5 mm is mixed in the combination to form a final composition. The composition is prepared by homogeneously mixing using a gravity-free powder mixer. Table 1 shows the physical and chemical properties of the hydraulic lime powder composition, and Table 2 shows the formulation of the mortar composition.

Referring to the functional mechanism of each composition used in the present invention is as follows. Quicklime (CaO) during lime has the effect of reducing the shrinkage by volume expansion as calcined lime (Ca (OH) ₂ ) with heat when water is applied, and lime (Ca (OH) ₂ ) is a typical plowing material. CO ₂ reaction with (carbonated) in the air by the screen and finally natural limestone (CaCO ₃₎ and gradually increasing the strength. The slaked lime particles do not bond with each other because they do not have a bonding force by themselves, but bond between particles in the process of natural limestone reaction due to long-term reaction with CO ₂ .

Scheme 1 CaO + H ₂ O → Ca (OH) ₂ + CO ₂ → CaCO ₃ + H ₂ O

Therefore, the lime system has a porous structure unlike the cement system due to such a hardened structure, and thus the moisture permeability and absorption rate are high, and thus the humidity can be controlled. The lime system also has antibacterial and antifungal functions due to alkalinity. Natural calcium carbonate is an inorganic filler that acts to enhance the coloring effect and smoothness.Natural cement has hydrophobic properties to form CSH gel by reaction with water to improve the initial strength, and natural anhydrous gypsum is a natural cement. It reacts with the hydraulic mineral of (calcium aluminate type) to form an expandable ettringite, thereby reducing dry shrinkage and suppressing cracking. On the other hand, natural fiber plays a role of preventing the transformation of the mortar cured body to prevent cracking and to enhance the bonding strength between particles, anionic surfactants by entraining the air when kneading with mortar and water ball bearing It works to improve the workability by the effect. Natural anhydrous gypsum, natural cement, ocher, natural fiber, anionic surfactant, etc., added to the lime system cause problems of abnormal expansion, strength reduction, and lime intrinsic functionality when excessively added. Addition is preferred.

Table 1 Physical and chemical properties of non-plastic natural hydraulic lime powder

Physical properties Whiteness (L value) 90㎛ sieve residual rate (%) 200㎛ sieve residual rate (%) Unit weight (kg / L) Heavy weight Powder level (cm ² / g) 72-78 0.3 to 0.5 0 0.58 to 0.62 2.56 to 2.75 9,500-11,600 Chemical properties SiO ₂ Al ₂ O ₃ Fe ₂ O ₃ CaO MgO K ₂ O Na ₂ O SO ₃ Ig.loss unit(%) 9.5 to 10.5 1.3 to 1.7 0.3 to 0.5 60 to 66 1.2 to 1.4 0.2 to 0.3 0.01 2.3 to 2.9 17-25

Table 2 Non-plastic natural hydraulic lime dry mortar blend composition (unit: parts by weight)

division Slaked lime quicklime Natural calcium carbonate Natural cement Natural Gypsum ocher Natural fiber Anionic surfactant aggregate 5-16 1-5 2 ~ 6 3 ~ 8 0.1-1.2 0-5 0-0.05 0-0.03 75-83

Hereinafter, the present invention will be described in detail through examples.

Example 1

1st process

Olefin sulfo to improve workability in 19.99kg of non-plastic natural hydraulic lime powder mixed with 10kg of hydrated lime, 1.5kg of quicklime, 1.5kg of natural calcium carbonate, 3kg of natural calcium carbonate, 5kg of natural cement, and 0.49kg of natural anhydrite. Non-plastic natural hydraulic lime composition was prepared by adding 0.01 kg of anionic anionic surfactant.

2nd process

Non-plastic natural hydraulic lime mortar is prepared by mixing 80 kg of feldspar aggregate or ordinary quartz sand having a particle size of 0.075 to 4.5 mm to a non-plastic natural hydraulic lime composition prepared in the first step for 10 minutes in a gravity-free mixer. It was.

Example 2

1st process

200kg 95% non-plastic natural hydraulic hydraulic lime powder mixed with 10kg of hydrated lime, 1.5kg of quicklime, 1.5kg of natural calcium carbonate, 3kg of natural calcium carbonate, 5kg of natural anhydrous gypsum and 0.464kg of natural anhydrous gypsum. A non-plastic natural hydraulic lime composition was prepared by adding 0.03 kg of dry straw, 0.03 kg of natural fiber, and 0.006 kg of an olefin sulfonate anionic surfactant for improving workability.

2nd process

Non-plastic natural hydraulic lime mortar is prepared by mixing 80 kg of feldspar aggregate or ordinary quartz sand having a particle size of 0.075 to 4.5 mm to a non-plastic natural hydraulic lime composition prepared in the first step for 10 minutes in a gravity-free mixer. It was.

Example 3

11kg of non-plastic natural hydraulic lime powder mixed with 11kg of hydrated lime, 1.7kg of quicklime, 1.7kg of natural carbonate, 2.5kg of natural calcium carbonate, 6kg of natural cement, 0.765kg of natural anhydrous gypsum A non-plastic natural hydraulic lime composition was prepared by adding 0.03 kg of natural fiber, which is 3 cm or less of dry straw, and 0.005 kg of an olefin sulfonate-based anionic surfactant for improving workability.

2nd process

Non-plastic natural hydraulic lime mortar is prepared by mixing 75 kg of feldspar aggregate or ordinary quartz sand having a particle size of 0.075 to 4.5 mm in a zero gravity mixer for 10 minutes in 25 kg of the non-plastic natural hydraulic lime composition prepared in the first step. It was.

Experimental Example (1)

The non-plastic natural hydraulic lime mortar prepared in Example 1 was used as a specimen, and various performance evaluations were performed. Table 3 shows the compounding ratio of the examples and Table 4 shows the results of the performance evaluation.

Experimental Example (2)

The non-plastic natural hydraulic lime mortar prepared in Example 2 was prepared as a specimen, and various performance evaluations were performed. Table 5 shows the compounding ratio of the examples and Table 6 shows the results of the performance evaluation.

Experimental Example (3)

The non-plastic natural hydraulic lime mortar prepared in Example 3 was prepared as a specimen and subjected to various performance evaluations. Table 7 shows the compounding ratio of the examples and Table 8 shows the results of the performance evaluation.

Comparative Experimental Example (1 to 15)

For comparison with the examples, a hydrous lime product from a European production area was obtained and mortared, and then a standard specimen was prepared. (Comparative Example 1) A comparative experiment was conducted to find the optimum composition ratio in each Example. . The comparative experiment compounding ratio of Example 1 is shown in Table 3, and the performance evaluation results are shown in Table 4 (Comparative Examples 2-6).

The comparative experiment compounding ratio of Example 2 is shown in Table 5, and the performance evaluation results are shown in Table 6 (Comparative Examples 7-11). The comparative experiment compounding ratio of Example 3 is shown in Table 7, and the performance evaluation results are shown in Table 8 (Comparative Examples 12-15).

Table 3 Combination Composition of Example 1 and Comparative Examples (1 to 6) (unit: parts by weight)

division Slaked lime quicklime Natural calcium carbonate Natural cement Natural Gypsum Anionic surfactant Calcined Hydraulic Lime aggregate water Example 1 10 1.5 3.0 5 0.49 0.01 80 20 Comparative Example 1 20 80 20 Comparative Example 2 10 1.0 3.0 5 0.99 0.01 80 20 Comparative Example 3 10 2.0 2.5 5 0.49 0.01 80 20 Comparative Example 4 10 2.5 2.0 5 0.49 0.01 80 20 Comparative Example 5 10 3.0 1.6 5 0.39 0.01 80 20 Comparative Example 6 10 4.0 0.7 5 0.29 0.01 80 20

Table 4 Performance evaluation results of Example 1 and Comparative Examples (1 to 6)

division Compressive strength (kgf / cm ² ) Setting time (hours: minutes) Conservative (Wt%) Air volume (Vol%) Water absorption coefficient ratio (kg / m ² h ^0.5 ) Length change rate (%) Moisture Permeability (Sd (m)) Thickness (m): 0.01 7 days 28 days First closing Example 1 25 34 5:25 7:25 59 21 2.95 0.06 0.10 Comparative Example 1 11 19 9:40 14:40 61 10 4.45 0.08 0.10 Comparative Example 2 23 31 6:10 8:15 58 22 2.54 0.07 0.13 Comparative Example 3 22 31 5:20 7:40 56 21 2.71 0.08 0.12 Comparative Example 4 22 29 5:05 7:40 56 24 2.65 0.08 0.11 Comparative Example 5 23 33 5:05 7:15 53 20 2.87 0.10 0.11 Comparative Example 6 21 29 4:50 7:05 51 22 3.02 0.09 0.10

Table 5 Combination Composition of Example 2 and Comparative Examples (7 to 11) (unit: parts by weight)

division Slaked lime quicklime Natural calcium carbonate Natural cement Natural Gypsum Natural fiber Anionic surfactant aggregate water Example 2 10 1.5 3.0 5 0.464 0.03 0.006 80 20 Comparative Example 7 10 1.5 3.0 5 0.490 0.010 80 20 Comparative Example 8 10 1.5 3.0 5 0.482 0.01 0.008 80 20 Comparative Example 9 10 1.5 3.0 5 0.473 0.02 0.007 80 20 Comparative Example 10 10 1.5 3.0 5 0.455 0.04 0.005 80 20 Comparative Example 11 10 1.5 3.0 5 0.446 0.05 0.004 80 20

Table 6 Performance evaluation results of Example 2 and Comparative Examples (7 to 11)

division Compressive strength (kgf / cm ² ) Setting time (hours: minutes) Conservative (Wt%) Air volume (Vol%) Water absorption coefficient ratio (kg / m ² h ^0.5 ) Length change rate (%) Moisture Permeability (Sd (m)) Thickness (m): 0.01 7 days 28 days First closing Example 2 25 34 5:05 7:00 56 19 2.90 0.03 0.10 Comparative Example 7 25 34 5:25 7:25 59 21 2.95 0.06 0.10 Comparative Example 8 24 34 5:20 7:45 59 22 2.92 0.06 0.10 Comparative Example 9 24 33 5:20 7:40 57 20 2.87 0.05 0.11 Comparative Example 10 19 29 5:00 6:50 55 19 2.71 0.03 0.10 Comparative Example 11 19 27 5:05 6:45 55 18 2.73 0.03 0.10

Table 7 Combination Composition of Example 3 and Comparative Examples (12 to 15) (unit: parts by weight)

division Slaked lime quicklime Natural calcium carbonate Natural cement Natural Gypsum ocher Natural fiber Anionic surfactant aggregate water Example 3 11 1.7 2.5 6 0.765 3 0.03 0.005 75 21 Comparative Example 12 15 1.5 3.0 5 0.465 0.03 0.005 75 21 Comparative Example 13 14 1.5 2.9 5 0.565 One 0.03 0.005 75 21 Comparative Example 14 12 1.5 2.8 6 0.665 2 0.03 0.005 75 21 Comparative Example 15 10 1.5 1.7 7 0.765 4 0.03 0.005 75 21

Table 8 Performance evaluation results of Example 3 and Comparative Examples (12 to 15)

division Compressive strength (kgf / cm ² ) Setting time (hours: minutes) Conservative (Wt%) Air volume (Vol%) Water absorption coefficient ratio (kg / m ² h ^0.5 ) Length change rate (%) Moisture Permeability (Sd (m)) Thickness (m): 0.01 7 days 28 days First closing Example 3 24 33 5:45 8:10 53 24 3.04 0.04 0.09 Comparative Example 12 22 31 5:05 7:15 62 20 2.98 0.04 0.11 Comparative Example 13 22 30 5:30 7:55 57 20 2.96 0.05 0.10 Comparative Example 14 21 31 5:55 8:00 55 21 2.98 0.04 0.10 Comparative Example 15 20 29 6:15 8:30 51 25 3.07 0.06 0.09

Since the present invention as described above is used only by mixing the water in the field, it is easy to construct, and having both the hardness and the hydraulic properties at the same time, to compensate for the low initial strength of the disadvantage of lime, by the reaction of gypsum and hydraulic minerals It minimizes the volume change, and in the long run, lime becomes calcified by reacting with carbon dioxide in the air, thereby gradually improving the surface strength and durability, and having a breathability and humidity control function due to the porous structure. In addition, it is excellent in coloring effect, its use is various as a high-quality interior and exterior irregular shape finish.

Claims (3)

In the non-plastic natural hydraulic lime mortar composition, 35 to 65 parts by weight of hydrated lime, 5 to 20 parts by weight of quicklime, 15 to 25 parts by weight of natural calcium carbonate, 25 to 35 parts by weight of natural cement made of clay limestone, 1-5 parts by weight of natural anhydrous gypsum, 0-5 parts by weight of ocher, 0 ~ 0.05 parts by weight of natural fiber which is 1 ~ 3 cm dry straw, and 0 ~ 0.03 parts by weight of anionic surfactant based on olefin sulfonate for improved workability A non-plastic natural hydraulic lime mortar composition comprising 17 to 25 parts by weight of non-plastic natural hydraulic composition composed of 75 to 83 parts by weight of feldspar aggregate or general quartz sand having a particle size of 0.075 to 4.5 mm. The method according to claim 1, wherein the non-plastic natural hydraulic lime composition is 35 to 65 parts by weight of hydrated lime, 5 to 20 parts by weight of quicklime, 15 to 25 parts by weight of natural calcium carbonate, 25 to 35 parts by weight of natural cement made of clay limestone, 1-5 parts by weight of natural anhydrous gypsum for minimum variation, 0-5 parts by weight of ocher, 0-0.05 parts by weight of natural fiber, 1 ~ 3 cm dry straw, 0 ~ 0.03 weight of olefin sulfonate-based anionic surfactant for improved workability Non-plastic natural hydraulic hydraulic mortar composition characterized in that the composition In the method for producing non-plastic natural hydraulic lime mortar, 1st process 200-mesh 95 to 100% of hydrated lime, 35 to 65 parts by weight of quicklime, 5 to 20 parts by weight of quicklime, 15 to 25 parts by weight of natural calcium carbonate, 25 to 35 parts by weight of natural cement made of clay limestone, minimum variation 1-5 parts by weight of natural anhydrous gypsum, 0-5 parts by weight of ocher, 0 ~ 0.05 parts by weight of natural fiber, 1 ~ 3cm dry straw, 0 ~ 0.03 parts by weight of anionic surfactant based on olefin sulfonate to improve workability To prepare a non-plastic natural hydraulic lime composition 2nd process 17 to 25 parts by weight of the non-plastic natural hydraulic lime composition prepared in the first step is mixed with feldspar aggregate or ordinary quartz sand having a particle size of 0.075 ~ 4.5mm to 75 to 83 parts by weight and mixed in a zero gravity mixer for 10 minutes. Non-fired natural hydraulic lime mortar manufacturing method characterized in that the manufacturing.