JP2017193686A - Surface impregnation material and structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface impregnation material having no change of appearance of a structure such as concrete, capable of applying proper amount by one application operation even when a construction surface is a wall or a roof and excellent in permeability.SOLUTION: There is provided a surface impregnation material containing alkoxysilane, polyoxyethylene polyoxybutylene glycol and water, the alkoxysilane is represented by the general formula (1), and existing in a zone surrounding lines connecting coordinates A and B, coordinates B and C, coordinates C and D and coordinates D and A when coordinate (X,Y) is plotted in a graph where X is pts.mass of polyoxyethylene polyoxybutylene glycol and Y is pts.mass of water based on 100 pts.mass of alkoxysilane. RSi(OR)(1), where Rrepresents an alkyl group having 5 to 12 carbon atoms or the like, Rrepresents an alkyl group having 1 to 4 carbon atoms and n represents 1 or 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a surface impregnated material and a structure used for various construction works in the civil engineering and construction fields.

  Concrete and mortar, etc. used in various structures are inherently excellent in durability, but because they have pores, moisture, salt, carbon dioxide, etc. permeate through the pores depending on the structure and usage environment. , Some may deteriorate. Such deterioration causes a decrease in strength and a loss of the structure.

  A water absorption preventing material having an alkoxysilane has been disclosed for application to the surface of a structure having such pores to suppress or prevent the penetration of moisture, salt, carbon dioxide and the like.

JP 2003-221576 A JP 2009-280716 A

  However, when the construction surface of the structure having pores is a wall or ceiling, the applied material flows downward (sagging), so that the material falls as droplets when applied on the ceiling surface, and On the wall surface, there was a problem that the impregnation depth near the upper part was insufficient. In addition, in order to apply an appropriate amount, an operation process in which application is repeated several times is necessary. Furthermore, if the coating interval becomes long, the material may react to start forming a water-repellent layer, which may hinder deep penetration.

  The present invention has been made in view of the above circumstances, and it is possible to apply an appropriate amount in one application operation even if the construction surface is a wall or ceiling without changing the appearance of a structure such as concrete. It is an object of the present invention to provide a surface impregnating material that is capable of providing high permeability. Moreover, an object of this invention is to provide the structure excellent in durability.

  As a result of intensive studies to achieve the above object, the present inventors have used a specific alkoxysilane, a specific polyoxyalkylene glycol, and water, and further satisfying a specific condition so that the surface It has been found that the workability and permeability of the impregnating material can be improved, and the present invention has been completed.

That is, the present invention contains an alkoxysilane, polyoxyethylene polyoxybutylene glycol, and water, and the alkoxysilane is represented by the following general formula (1). When the mass part of oxybutylene glycol is X and the mass part of water is Y, and the coordinates (X, Y) are plotted on the graph, the coordinates (9, 10.5) and the coordinates (37, 29) are connected. Line segment, line segment connecting coordinates (37, 29) and coordinates (37, 44), line segment connecting coordinates (37, 44) and coordinates (9, 15), and coordinates (9, 15) and coordinates Provided is a surface impregnated material in a region surrounded by a line segment connecting (9, 10.5).
R ¹ _n Si (OR ² ) _4-n (1)
(In the formula, R ¹ represents an alkyl group having 5 to 12 carbon atoms or a phenyl group, and n represents 1 or 2. When n is 2, R ¹ may be the same as or different from each other. R ² represents an alkyl group having 1 to 4 carbon atoms, and a plurality of R ² may be the same or different from each other.

  Even if the construction surface is a wall or a ceiling, the surface impregnating material of the present invention can be applied in an appropriate amount by a single application operation and has excellent permeability. That is, by applying the surface impregnating material of the present invention to the surface of a structure having pores such as concrete and mortar, a specific alkoxysilane penetrates deeply into the structure, and cement contained in concrete and mortar, etc. A water-repellent layer or a water-repellent part is formed in the vicinity of the surface of the structure by reacting with a component or the like, and penetration of moisture, salt, carbon dioxide, or the like can be suppressed or prevented. In addition, when the surface impregnating material contains polyoxyethylene polyoxybutylene glycol and water, sagging of the surface impregnating material can be suppressed. For this reason, even if the construction surface is a wall or a ceiling, the surface impregnation material of the present invention can be applied in an appropriate amount by a single application operation and can maintain excellent permeability.

In the surface impregnated material of the present invention, polyoxyethylene polyoxybutylene glycol is preferably represented by the following general formula (2). Thereby, it becomes possible to further suppress the sagging of the surface impregnating material.
_{HO- (C 2 H 4 O)} n - (C 4 H 8 O) m - (C 2 H 4 O) n -H (2)
(In the formula, n represents 10 to 20, and m represents 20 to 35.)

  The present invention comprises a main body portion containing a cement component, a water repellent layer formed on the main body portion, and at least one of a water repellent portion formed inside the main body portion, and the water repellent layer and the water repellent layer. The section provides a structure including a reaction product of the alkoxysilane and the cement component contained in the surface impregnated material. Since the structure of the present invention has at least one of a water repellent layer and a water repellent part, it can suppress or prevent the penetration of moisture, salt, carbon dioxide, etc., and maintain a structure with excellent durability over a long period of time. it can.

  According to the present invention, even if the construction surface is a wall or a ceiling without changing the appearance of a structure such as concrete, it is possible to apply an appropriate amount in a single application operation. It is possible to provide a surface-impregnated material excellent in suppressing the above.

  Since the structure of the present invention has at least one of a water-repellent layer and a water-repellent part formed by a reaction between a specific alkoxysilane and a cement component contained in the surface impregnated material in the vicinity of the structure surface, It is possible to suppress or prevent the penetration of moisture, salinity, carbon dioxide, etc., and maintain a structure with excellent durability over a long period of time. Therefore, the structure of the present invention can contribute to reduction of life cycle cost.

It is a graph which shows the relationship between content (mass part) of polyoxyethylene polyoxybutylene glycol and content (mass part) of water with respect to 100 mass parts of alkoxysilanes. It is a schematic cross section of the structure concerning one embodiment.

<Surface impregnating material>
One embodiment of the surface impregnated material of the present invention will be described below. The surface impregnating material of this embodiment is a surface impregnating material used for applying to the surface of a structure having pores such as concrete and mortar, and includes alkoxysilane, polyoxyethylene polyoxybutylene glycol, and water. Containing.

  The alkoxysilane is an alkoxysilane represented by the following general formula (1). By containing such alkoxysilane, a water repellent layer or a water repellent part is formed in the vicinity of the surface of the structure having pores by reacting with cement components contained in concrete or mortar, etc. Infiltration of carbon or the like can be suppressed or prevented.

R ¹ _n Si (OR ² ) _4-n (1)

In general formula (1), R ¹ represents an alkyl group having 5 to 12 carbon atoms or a phenyl group, and n represents 1 or 2. When n is 2, R ¹ may be the same as or different from each other. R ² represents an alkyl group having 1 to 4 carbon atoms, and a plurality of R ² may be the same as or different from each other. By having such R ¹ and R ² , the alkoxysilane penetrates deeply into the structure, and it becomes easy to form a water-repellent layer or a water-repellent part having a good blocking performance.

  Specific examples of the alkyl group having 5 to 12 carbon atoms include a pentyl group, a hexyl group, an octyl group, a decyl group, and a dodecyl group. These may be linear, branched, or cyclic, but are preferably linear.

  Examples of the alkoxysilane represented by the general formula (1) include hexyltrimethoxysilane, octyltrimethoxysilane, decyltrimethoxysilane, hexyltriethoxysilane, octyltriethoxysilane, decyltriethoxysilane, and dihexyldiethoxysilane. And alkyltrialkoxysilanes and dialkyldialkoxysilanes such as phenyltrimethoxysilane, phenyltriethoxysilane, diphenyldimethoxysilane, and diphenyldiethoxysilane.

In the formula (1), n is preferably 1. By using an alkoxysilane in which n is 1, that is, an alkoxysilane having one R ¹ group and three OR ² groups, a hydrolysis reaction with a cement component contained in concrete or mortar easily occurs. Thus, it becomes easy to form a water repellent layer or a water repellent portion in the vicinity of the structure surface.

  In the formula (1), as the alkoxysilane in which n is 1, alkyltrialkoxy such as hexyltrimethoxysilane, octyltrimethoxysilane, decyltrimethoxysilane, hexyltriethoxysilane, octyltriethoxysilane and decyltriethoxysilane Silanes and phenyltrialkoxysilanes such as phenyltrimethoxysilane and phenyltriethoxysilane.

  The molecular weight of the alkoxysilane represented by the formula (1) is preferably 190 to 340, more preferably 200 to 300. When the molecular weight of the alkoxysilane is in the above range, a water-repellent layer or a water-repellent part capable of improving the balance between permeability and reactivity and improving durability near the surface of the structure having pores. It can be expected to suppress or prevent the penetration of moisture, salt, carbon dioxide and the like.

  The impregnation depth of the mortar substrate impregnated with alkoxysilane is preferably 2.2 mm or more, more preferably 2.5 mm or more, further preferably 3.0 mm or more, and particularly preferably 3.5 mm or more. It is. The alkoxysilane used for the surface impregnation material is preferably selected to have such impregnation performance. Here, the impregnation depth is a value obtained in accordance with “6.2 Impregnation depth test” of “17. Test method of surface impregnated material (draft)” of JSCE K-571-2010.

  The water permeation suppression ratio of the mortar substrate impregnated with alkoxysilane is preferably 75% or more, and more preferably 80% or more. The alkoxysilane used for the surface impregnating material is preferably selected to have such a water permeation suppression ratio. Here, the water permeation suppression ratio is calculated by calculating the water permeation ratio (%) in accordance with “6.3 Water Permeability Test” in “17. Test Method for Surface Impregnated Material (Draft)” in JSCE K-571-2010. The value obtained by subtracting the water permeability ratio (%) from 100% is shown.

  A conventionally well-known thing can be used for polyoxyethylene polyoxybutylene glycol, and a commercial item can also be used as it is. Polyoxyethylene polyoxybutylene glycol can be obtained, for example, by reacting ethylene oxide and tetrahydrofuran with water using an acid as a catalyst. However, the manufacturing method is not limited to this. Since polyoxyethylene polyoxybutylene glycol has high solubility in alkoxysilane, it is possible to increase the viscosity of the surface impregnating material without hindering the action of alkoxysilane.

The polyoxyethylene polyoxybutylene glycol is preferably represented by the following general formula (2). Thereby, it becomes possible to further suppress the sagging of the surface impregnating material.
_{HO- (C 2 H 4 O)} n - (C 4 H 8 O) m - (C 2 H 4 O) n -H
(In the formula, n represents 10 to 20, and m represents 20 to 35.)

  The content of polyoxyethylene polyoxybutylene glycol is preferably 9 to 37 parts by mass, more preferably 10 to 36 parts by mass, and still more preferably 11 to 35 parts by mass with respect to 100 parts by mass of alkoxysilane. is there. When the content of the polyoxyethylene polyoxybutylene glycol is in such a range, the sagging of the surface impregnating material can be more sufficiently suppressed.

  As the water, tap water, industrial water, ion exchange water, pure water such as distilled water, ultrapure water such as Milli Q water, or the like can be used. Tap water may be used because it is easily available and economically inexpensive.

  The water content can be adjusted in the range of 10.5 to 44 parts by mass with respect to 100 parts by mass of alkoxysilane, for example, in accordance with the content of polyoxyethylene polyoxybutylene glycol.

  In the surface impregnated material of this embodiment, with respect to 100 parts by mass of alkoxysilane, the mass part of polyoxyethylene polyoxybutylene glycol is X, the mass part of water is Y, and the coordinates (X, Y) are graphs (X− Y line diagram), a line segment connecting coordinates (9, 10.5) and coordinates (37, 29), a line segment connecting coordinates (37, 29) and coordinates (37, 44), Surrounded by a line segment connecting coordinates (37, 44) and coordinates (9, 15) and a line segment connecting coordinates (9, 15) and coordinates (9, 10.5) (four line segments) In the area. Here, the enclosed area is a concept including what is on the line segment. In FIG. 1, coordinates (9, 10.5) are indicated by coordinates A, (37, 29) are indicated by coordinates B, (37, 44) are indicated by coordinates C, and (9, 15) are indicated by coordinates D.

  The (X, Y) of the surface impregnated material of the present embodiment is a line segment connecting the coordinates (10, 12.5) and the coordinates (36, 30), the coordinates (36, 30) and the coordinates (36, 41. 5), a line segment connecting coordinates (36, 41.5) and coordinates (10, 14.5), and coordinates (10, 14.5) and coordinates (10, 12.5) Is preferably in the region surrounded by the line segments (four line segments) connecting the coordinates (11, 14) and the coordinates (35, 30.5), the coordinates (35, 30.5). )) And the coordinates (35, 39) and the line (three lines) connecting the coordinates (35, 39) and the coordinates (11, 14). More preferred. As the water content Y increases, the preferred range of the polyoxyethylene polyoxybutylene glycol content X increases, so the viscosity tends to be easily adjusted. For this reason, in the region surrounded by the four line segments or the three line segments, the range of X can expand as Y increases.

  The surface impregnating material of the present embodiment can contain other components in addition to alkoxysilane, polyoxyethylene polyoxybutylene glycol, and water as long as the effects of the present invention are not significantly impaired. Examples of other components include dyes.

  The viscosity of the surface impregnated material of this embodiment at a rotation speed of 0.5 rpm at a temperature of 20 ° C. is preferably 300 mPa · s or more, more preferably 350 mPa · s or more, and further preferably 400 mPa · s or more. This viscosity was measured using a BH viscometer with a rotational speed of 0.5 rpm and a rotor No. 3 is measured. When the viscosity is in such a range, sagging can be further suppressed even if the construction surface is a wall or a ceiling. The viscosity of the surface impregnated material at a temperature of 20 ° C. and a rotation speed of 0.5 rpm is not particularly limited, but is preferably 10,000 mPa · s or less, more preferably 7000 mPa · s or less, and even more preferably 5000 mPa · s or less. Particularly preferred is 3000 mPa · s or less, and most preferred is 2000 mPa · s or less.

The coating amount of the surface impregnating material of the present embodiment is not particularly limited, but is preferably 100 to 500 g / m ² , more preferably 150 to 400 g / m ² by one application to the surface of the structure. More preferably 175 to 375 g / m ² , particularly preferably 200 to 350 g / m ² . By applying at such an application amount, the balance between the above-described alkoxysilane permeability and sagging suppression is further improved, and the penetration of moisture, salt, carbon dioxide, etc. is sufficiently suppressed near the structure surface. A water repellent layer or a water repellent part can be formed. Moreover, it is excellent also in workability.

The application amount of alkoxysilane applied by one application to the structure surface is not particularly limited, but is preferably 100 to 500 g / m ² , more preferably 120 to 400 g / m ² , Preferably it is 130-350 g / m < ² >.

  The method for producing a surface impregnated material of the present embodiment includes a step of adding polyoxyethylene polyoxybutylene glycol to at least alkoxysilane and heating and mixing, a step of further mixing water, and then cooling the resulting mixture. It is preferable to provide a process. The heating and mixing step can be performed at a temperature of 50 to 70 ° C. for 0.1 to 1 hour, for example. Thereby, polyoxyethylene polyoxybutylene glycol dissolves in alkoxysilane, and an alkoxysilane solution can be prepared. Moreover, after preheating alkoxysilane to 50-70 degreeC previously, you may add and mix polyoxyethylene polyoxybutylene glycol. In the water mixing step, water can be added, for example, in a state where the alkoxysilane solution is kept at 50 to 70 ° C. The cooling step can be performed by natural cooling or the like, and is cooled to room temperature (for example, 25 ° C.). The stirrer used in the heating and mixing step, the water mixing step and the cooling step is not particularly limited as long as it can be uniformly mixed and dispersed. For example, a stirrer such as a dissolver can be used. Moreover, it is preferable to continue stirring with a stirrer from the viewpoint of stabilizing the solution during the heating and mixing step, the water mixing step, and the cooling step.

<Structure>
FIG. 2 is a schematic cross-sectional view of a structure according to an embodiment. The structure 10 of the present embodiment includes a main body portion 20 containing a cement component, at least one of a water repellent layer 40 formed on the main body portion and a water repellent portion 50 formed inside the main body portion. Prepare. The water repellent layer 40 constitutes a surface portion of the structure 10 on the main body portion 20. The water repellent part 50 is a part formed by impregnating the surface impregnating material in the main body part 20. The water repellent layer 40 and the water repellent part 50 contain a reaction product of an alkoxysilane and a cement component contained in the surface impregnated material. The structure of the present embodiment can be obtained by applying the surface impregnating material described above to the surface of concrete, mortar or the like used in various structures. Since the structure of this embodiment has a water-repellent layer or a water-repellent part formed by a reaction between a specific alkoxysilane contained in the surface impregnated material and a cement component, etc., moisture, salt, carbon dioxide, etc. Can be prevented or prevented, and a structure with excellent durability can be maintained over a long period of time.

  The impregnation depth of the surface impregnating material in the structure of the present embodiment is preferably 2.2 mm or more, more preferably 2.5 mm or more, further preferably 3.0 mm or more, and particularly preferably 3. 5 mm or more, and most preferably 4.0 mm or more. Here, the impregnation depth is a value obtained in accordance with “6.2 Impregnation depth test” of “17. Test method of surface impregnated material (draft)” of JSCE K-571-2010.

  The water permeation suppression ratio of the structure of the present embodiment is preferably 75% or more, and more preferably 80% or more. Here, the water permeation suppression ratio is calculated by calculating the water permeation ratio (%) in accordance with “6.3 Water Permeability Test” in “17. Test Method for Surface Impregnated Material (Draft)” in JSCE K-571-2010. The value obtained by subtracting the water permeability ratio (%) from 100% is shown.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment.

The contents of the present invention will be described in more detail below using examples and comparative examples. However, the present invention is not limited to the following examples.
(Experimental example 1)
[Materials used]
The alkoxysilanes 1-19 shown in Table 1 were prepared. Table 1, the hydrophobic group of the alkoxysilane (R ^1), the carbon number of the hydrophobic water group (R ^1), and are shown together molecular weight.

  The alkoxysilane of Table 1 was apply | coated to the mortar board | substrate surface with the application quantity shown in Table 2 using a brush, and the impregnation depth and the water-permeable suppression ratio were measured. The production method of the mortar substrate and the measurement method of the impregnation depth and the water permeation suppression ratio are as follows.

[Production of mortar substrate]
It was prepared according to “5.1.1 Preparation of Mortar Substrate” in “17. Test Method of Surface Impregnated Material (Draft)” of JSCE K-571-2010.

[Alkoxysilane Evaluation Method]
(1) Impregnation depth It was performed in accordance with “6.2 Impregnation depth test” of “17. Test method of surface impregnated material (draft)” of JSCE K-571-2010.
(2) Permeability suppression ratio Calculate the permeation ratio (%) based on “6.3 Permeability Test” in “17. Test Method of Surface Impregnated Material (Draft)” of JSCE K-571-2010. A value obtained by subtracting the water permeability ratio (%) was defined as a “water permeability suppression ratio”.

From Table 2, the alkoxysilanes 1 and 2 not having R ¹ did not satisfy both or one of the impregnation depth of 2.2 mm or more and the water permeation suppression ratio of 75% or more. Further, the alkoxysilane 3 to 9 R ¹ is an alkyl group or a vinyl group having 1 to 4 carbon atoms, impregnation depth 2.2mm or more and permeability suppression ratio did not meet one or both of 75% or more . In addition, alkoxysilanes 16 to 19 in which R ¹ is an alkyl group having a glycidoxy group or a methacryloxy group had a water permeation suppression ratio of 75% or more, but did not satisfy the condition of an impregnation depth of 2.2 mm or more.

From Table 2, alkoxysilane 10 to 15 ^{R 1} is an alkyl group or a phenyl group having 5 to 12 carbon atoms, impregnation depth 2.2mm or more and permeability suppression ratio meets the 75% or more of both conditions It was.

(Example 1, Comparative Example 1)
[Materials used]
The raw materials shown in the following (1) to (3) were prepared.

(1) Polyoxyethylene polyoxybutylene glycol A: HO— (C ₂ H ₄ O) _n — (C ₄ H ₈ O) _m — (C ₂ H ₄ O) _n —H (n = 15, m = 27) , Shape: powder)
(2) Polyoxyethylene polyoxypropylene glycol B: HO— (C ₂ H ₄ O) _n — (C ₃ H ₆ O) _m — (C ₂ H ₄ O) _n —H (n = 8, m = 17) , Shape: powder)
_{C: HO- (C 2 H 4} O) n - (C 3 H 6 O) m - (C 2 H 4 O) n -H (n = 2.5, m = 34, shape: powder)
_{D: HO- (C 2 H 4} O) n - (C 3 H 6 O) m - (C 2 H 4 O) n -H (n = 15, m = 34, shape: powder)
(3) Water Tap water

  After the alkoxysilanes 14 and 15 were stirred with a magnetic stirrer and heated to 60 ° C., the raw materials shown in the above (1) and (2) were added in the proportions shown in Table 3 and mixed for 3 minutes to obtain a solution. While maintaining the solution at 60 ° C., water in the ratio shown in Table 3 was added, and naturally cooled to 20 ° C. with stirring to prepare surface impregnated materials 1 to 18.

  FIG. 1 shows the content (parts by mass) of polyoxyethylene polyoxybutylene glycol with respect to 100 parts by mass of alkoxysilane on the horizontal axis and the content of water (parts by mass) with respect to 100 parts by mass of alkoxysilane on the vertical axis. It is the graph which plotted the composition of each surface impregnation material to show. In FIG. 1, four straight lines are a straight line connecting coordinates (9, 10.5) and coordinates (37, 29), a straight line connecting coordinates (37, 29) and coordinates (37, 44), and a coordinate (37 , 44) and the coordinates (9, 15), and the straight line connecting the coordinates (9, 15) and the coordinates (9, 10.5). The plot of circles (black circles and white circles) in FIG. The triangle (black triangle and white triangle) plot in FIG. 1 uses alkoxysilane 15. The black circle plots (surface impregnated materials 3, 5-7) and the black triangle plots (surface impregnated materials 16-18) are the line segments and coordinates connecting coordinates (9, 10.5) and coordinates (37, 29). A line segment connecting (37, 29) and coordinates (37, 44), a line segment connecting coordinates (37, 44) and coordinates (9, 15), and coordinates (9, 15) and coordinates (9, 10). 5) in the region surrounded by the line segments (four line segments).

[Evaluation of surface impregnated material]
The viscosities and surface colors of the surface impregnated materials 1 to 18 were evaluated. The results are shown in Table 4. Moreover, each evaluation was performed by the method shown below.

(1) Viscosity Under the conditions of a temperature of 20 ° C., the viscosity at a rotational speed of 0.5 rpm, 20 rpm, and 100 rpm is measured using a BH type viscometer (B type viscometer BH, rotor No. 3 manufactured by Toki Sangyo Co., Ltd.). It was measured. Here, if it was 300 mPa · s or more at 0.5 rpm, there was no sagging. Note that rpm represents the number of rotations per minute.

(2) Surface color A surface impregnated material was applied to a horizontal mortar substrate using an applicator so that the thickness was 225 μm in the horizontal direction, and the degree of the coated surface of the mortar substrate was visually confirmed after 2 weeks. .
A: Colorless (no difference in surface color between the surface impregnated material and mortar substrate)
B: Slightly colored (surface impregnated material applied portion is slightly colored)
C ... Coloring (surface impregnation material application part is colored)

  As shown in Table 4, in the surface impregnating materials 3, 5 to 7, and 16 to 18, the viscosity was 300 mPa · s or more at a rotation speed of 0.5 rpm, and good results were shown (Examples 1-1 to 1). -7). Also, good results were shown for the appearance. On the other hand, the surface impregnated materials 1, 2, 4, and 15 had a viscosity of less than 300 mPa · s at a rotation speed of 0.5 rpm. (Comparative Examples 1-1 to 1-3, 1-11). Moreover, in the surface impregnation materials 8-14 which mix | blended polyoxyethylene polyoxypropylene glycol, isolation | separation generate | occur | produced and the surface impregnation material could not be prepared (Comparative Examples 1-4 to 1-10).

(Example 2)
The impregnation depth and the water permeation suppression ratio with respect to the mortar substrate were evaluated using the surface impregnated materials 3, 5-7, and 16-18. The results are shown in Table 5. Here, the test body was prepared by applying the surface impregnated material to the mortar substrate by applying the roller once with the application amount shown in Table 5. A method for producing a mortar substrate and a method for evaluating each specimen are as follows.

[Production of mortar substrate]
It was prepared according to “5.1.1 Preparation of Mortar Substrate” in “17. Test Method of Surface Impregnated Material (Draft)” of JSCE K-571-2010.

[Evaluation method]
(1) Impregnation depth In accordance with “6.2 Impregnation depth test” of “17. Test method for surface impregnated material (draft)” of JSCE K-571-2010, the impregnation depth of the test specimen in each example Was evaluated.
(2) Permeability inhibition ratio Based on “6.3 Permeability Test” in “17. Test Method of Surface Impregnated Material (Draft)” of JSCE K-571-2010, the permeation ratio (%) of each specimen was calculated. The value obtained by subtracting the water permeability ratio (%) from 100% was taken as the “water permeability suppression ratio” in each example.

  As shown in Table 5, in Examples 2-1 to 2-7 using the surface impregnating materials 3, 5 to 7, and 16 to 18, the impregnation depth was all 3.0 mm or more, which was a favorable result. . Moreover, the water permeability suppression ratio was 80% or more, which was a good result.

  According to the present invention, even if the construction surface is a wall or a ceiling, it is possible to apply an appropriate amount in one application operation, and to provide a surface impregnating material excellent in permeability and suppression of sagging. Can do. In addition, the structure of the present invention reacts with the surface impregnating material to form a water repellent layer near the surface of the structure, thereby suppressing or preventing the penetration of moisture, salt, carbon dioxide, etc. It is possible to maintain an excellent structure and contribute to reduction of life cycle cost.

  DESCRIPTION OF SYMBOLS 10 ... Structure, 20 ... Main-body part, 40 ... Water-repellent layer, 50 ... Water-repellent part.

Claims (3)

Containing alkoxysilane, polyoxyethylene polyoxybutylene glycol, and water,
The alkoxysilane is represented by the following general formula (1):
When the mass part of the polyoxyethylene polyoxybutylene glycol is X, the mass part of the water is Y, and the coordinates (X, Y) are plotted on the graph with respect to 100 parts by mass of the alkoxysilane, the coordinate (9 , 10.5) and coordinates (37, 29), line segments connecting coordinates (37, 29) and coordinates (37, 44), coordinates (37, 44) and coordinates (9, 15). And a surface impregnated material in a region surrounded by a line segment connecting the coordinates (9, 15) and the coordinates (9, 10.5).
R ¹ _n Si (OR ² ) _4-n (1)
(In the formula, R ¹ represents an alkyl group having 5 to 12 carbon atoms or a phenyl group, and n represents 1 or 2. When n is 2, R ¹ may be the same as or different from each other. R ² represents an alkyl group having 1 to 4 carbon atoms, and a plurality of R ² may be the same or different from each other. The surface-impregnated material according to claim 1, wherein the polyoxyethylene polyoxybutylene glycol is represented by the following general formula (2).
_{HO- (C 2 H 4 O)} n - (C 4 H 8 O) m - (C 2 H 4 O) n -H (2)
(In the formula, n represents 10 to 20, and m represents 20 to 35.) A main body containing a cement component;
A water repellent layer formed on the main body portion, and at least one of a water repellent portion formed inside the main body portion,
The said water-repellent layer and the said water-repellent part are structures containing the reaction product of the said alkoxysilane and the said cement component contained in the surface impregnation material of Claim 1 or 2.

Images