JP6377415B2 - Surface impregnating material and structure - Google Patents

Description

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

  Concrete, mortar, etc. used for 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 or a defect of the structure.

  A water absorption preventing material having an alkoxysilane is disclosed for applying to the surface of a structure having such pores to suppress or prevent permeation of moisture, salt or carbon dioxide.

JP 2003-221576 A JP 2009-280716 A

  However, if the construction surface of the structure with pores is a wall or ceiling, the applied material will flow downward (sag), so the material will fall as droplets on the ceiling surface, near the top on the wall surface There were problems such as insufficient impregnation depth. In addition, in order to apply an appropriate amount, it is necessary to apply several times repeatedly, and when the application interval becomes longer, the material reacts to form a water repellent layer, and the material is deeper than that. Sometimes impeded the penetration.

  The present invention has been made in view of the above circumstances, and even if the construction surface is a wall or a ceiling, it is possible to apply an appropriate amount in a single application operation, and the surface is excellent in suppressing sagging An object is to provide an impregnating material. Moreover, an object of this invention is to provide the structure excellent in durability.

  As a result of diligent studies to achieve the above object, the present inventors have found that the use of a specific alkoxysilane, a higher fatty acid amide, and a solvent can improve the permeability of the surface impregnating material. The invention has been completed.

That is, this invention provides the surface impregnation material which has alkoxysilane, a higher fatty acid amide, and a solvent, and alkoxysilane is represented by following formula (1).
R ¹ _n Si (OR ² ) _4-n (1)
(In the formula, R ¹ represents a phenyl group which may be substituted with an alkyl group having 5 to 12 carbon atoms or an alkyl group having 1 to 4 carbon atoms, and n represents 1 or 2. When n is 2, R ¹ may be the same 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 impregnated 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 or mortar, a specific alkoxysilane penetrates into the structure, and the cement component contained in the concrete or mortar It forms a water-repellent layer in the vicinity of the surface of the structure by reacting with the like, and can suppress or prevent the penetration of moisture, salt, carbon dioxide and the like. Moreover, it is possible to suppress sagging of the surface impregnating material by having a higher fatty acid amide, and even if the construction surface is a wall or a ceiling, an appropriate amount can be applied by a single application operation.

  The preferable aspect of the surface impregnation material of this invention is shown below. In the present invention, it is more preferable to appropriately combine these aspects.

  The surface impregnated material of the present invention preferably has a viscosity at a temperature of 20 ° C. and a rotational speed of 0.5 rpm (rotation / minute) of 1000 mPa · s or more. By setting it as such a range, it becomes possible to suppress the dripping of a surface impregnation material still more fully.

  In this invention, the structure obtained by apply | coating the above-mentioned surface impregnation material to the structure surface is provided. Since the structure of the present invention has a water repellent layer formed by reacting with the surface impregnating material, it suppresses or prevents the penetration of moisture, salt, carbon dioxide, etc., and has a structure with excellent durability over a long period of time. Can be maintained.

  ADVANTAGE OF THE INVENTION According to this invention, even if a construction surface is a wall or a ceiling, it is possible to apply | coat an appropriate amount by one application | coating operation | work, and can provide the surface impregnation material excellent in suppression of sagging.

  Since the structure of the present invention reacts with the surface impregnating material to form a water-repellent layer near the structure surface, it suppresses or prevents the penetration of moisture, salt, carbon dioxide, etc., and has excellent durability over a long period of time. The structure can be maintained. Therefore, the structure of the present invention can contribute to reduction of life cycle cost.

<Surface impregnating material>
A preferred 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 contains alkoxysilane, a higher fatty acid amide, and a solvent. .

  The alkoxysilane is an alkoxysilane represented by the following formula (1). By containing such alkoxysilane, a water repellent layer is formed near the surface of the structure having pores by reacting with cement components contained in concrete, mortar, etc., and penetration of moisture, salt, carbon dioxide, etc. Can be suppressed or prevented.

R ¹ _n Si (OR ² ) _4-n (1)

In formula (1), R ¹ represents a phenyl group which may be substituted with an alkyl group having 5 to 12 carbon atoms or an alkyl group having 1 to 4 carbon atoms, 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 , it becomes easy for the alkoxysilane to penetrate deeply into the structure.

  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.

  The phenyl group which may be substituted with an alkyl group having 1 to 4 carbon atoms refers to a phenyl group or a phenyl group in which any hydrogen atom on the phenyl group is substituted with an alkyl group having 1 to 4 carbon atoms. The number of the alkyl group having 1 to 4 carbon atoms in the phenyl group substituted with the alkyl group having 1 to 4 carbon atoms is not particularly limited, but is preferably 1 to 3, and more preferably 1. Specific examples of the phenyl group substituted with an alkyl group having 1 to 4 carbon atoms include a methylphenyl group and an ethylphenyl group.

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

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 or the like contained in concrete or mortar easily occurs. Thus, it becomes easy to form a water repellent layer in the vicinity of the surface of the structure.

  In the formula (1), as the alkoxysilane in which n is 1, alkyltrialkoxy such as hexyltrimethoxysilane, octyltrimethoxysilane, decyltrimethoxysilane, hexyltriethoxysilane, octyltriethoxysilane, decyltriethoxysilane, etc. Silane; phenyltrialkoxysilane 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, the balance between permeability and reactivity is further improved, and a better water-repellent layer is formed near the surface of the structure having pores, such as moisture, salinity and carbon dioxide. It can be expected to suppress or prevent the penetration.

  The higher fatty acid amide refers to a fatty acid amide having a long chain fatty acid having 12 or more carbon atoms. The fatty acid may be a saturated fatty acid or an unsaturated fatty acid.

  Carbon number of higher fatty acid amide becomes like this. Preferably it is 12-30, More preferably, it is 16-28, More preferably, it is 18-26, Most preferably, it is 20-24.

  Specific examples of the higher fatty acid amide include erucic acid amide, behenic acid amide, stearic acid amide, oleic acid amide, palmitic acid amide, myristic acid amide, lauric acid amide and the like. Suitable commercially available products include Neutron, BMT, PNT, SNT (all trade names, Nippon Seika Co., Ltd.), Diamond, Amide, Nikka Amide, Methylolamide (all trade names, Nippon Kasei Co., Ltd.), etc. Is mentioned.

  The content of the higher fatty acid amide is preferably 0.2 to 5 parts by mass, more preferably 0.4 to 4 parts by mass, and still more preferably 0.6 to 3 parts per 100 parts by mass of the alkoxysilane. It is a mass part, Most preferably, it is 0.8-2.5 mass part. Here, the content of the higher fatty acid amide is the mass of the higher fatty acid amide alone that does not contain a solvent. When the content of the higher fatty acid amide is in the above range, the sagging prevention property when applied to the wall or ceiling functions more reliably, and the workability is improved.

  The higher fatty acid amide is preferably used by mixing a powdered higher fatty acid amide and a solvent described later to form a paste, that is, in a state having fluidity and viscosity. By using the paste-like higher fatty acid amide, the sagging of the surface impregnating material can be more sufficiently suppressed even when the construction surface is a wall or a ceiling. The pasty higher fatty acid amide may be a solution or a suspension (dispersion).

  The solvent is preferably one that can dissolve the powdered higher fatty acid amide. Specifically, for example, alcohols such as methanol, ethanol, isopropyl alcohol, n-butanol, isobutanol and benzyl alcohol; esters such as ethyl acetate and butyl acetate; aromatic hydrocarbons such as xylene; water and the like Can be used alone or in combination.

  The content of the higher fatty acid amide in the pasty higher fatty acid amide is preferably 1 to 50% by mass, more preferably 5 to 40% by mass, and still more preferably based on the total mass of the higher fatty acid amide and the solvent. Is 8 to 32% by mass.

  As the pasty higher fatty acid amide, a commercially available product can be used. Suitable commercial products include talen, flonon (both trade names, Kyoeisha Chemical Co., Ltd.) and the like.

  The surface-impregnated material of the present embodiment can contain other components in addition to alkoxysilane, higher fatty acid amide, and solvent 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 20 rpm at a temperature of 20 ° C. is preferably 100 to 1100 mPa · s, more preferably 110 to 900 mPa · s, and further preferably 300 to 800 mPa · s. Particularly preferably, it is 350 to 700 mPa · s. This viscosity was measured using a BH viscometer with a rotation speed of 20 rpm and a rotor No. 2 is measured. When the viscosity of the surface impregnated material at a temperature of 20 ° C. and a rotation speed of 20 rpm is in the above range, even if the construction surface is a wall or a ceiling, the sagging prevention function functions more reliably and the workability is improved.

  The viscosity of the surface impregnated material of the present embodiment at a rotation speed of 0.5 rpm at a temperature of 20 ° C. is preferably 1000 mPa · s or more, more preferably 1200 mPa · s or more, and further preferably 1500 mPa · s or more, Particularly preferably, it is 1800 mPa · s or more. This viscosity was measured using a BH viscometer with a rotational speed of 0.5 rpm and a rotor No. 2 is measured. When the viscosity of the surface impregnated material at a rotation speed of 0.5 rpm at a temperature of 20 ° C. is in the above-mentioned range, even if the construction surface is a wall or a ceiling, the sagging prevention function functions more reliably. The upper limit of the viscosity of the surface impregnated material at a rotation speed of 0.5 rpm at a temperature of 20 ° C. is not particularly limited, but is, for example, 15000 mPa · s or less, preferably 13000 mPa · s or less, more preferably 12000 mPa · s or less. More preferably, it is 11000 mPa · s or less.

  The viscosity of the surface impregnated material of the present embodiment at a rotation speed of 100 rpm at a temperature of 20 ° C. is preferably 500 mPa · s or less, more preferably 450 mPa · s or less, still more preferably 400 mPa · s or less, particularly preferably. Is 350 mPa · s or less. This viscosity was measured using a BH viscometer with a rotation speed of 100 rpm and a rotor No. 2 is measured. When the viscosity of the surface impregnated material at a rotation speed of 100 rpm at a temperature of 20 ° C. is in the above range, workability and workability are improved. The lower limit of the viscosity of the rotation speed of 100 rpm at a temperature of 20 ° C. of the surface impregnating material is not particularly limited, but is, for example, 10 mPa · s or more, preferably 20 mPa · s or more, more preferably 30 mPa · s or more, More preferably, it is 40 mPa · s or more.

  The TI value (RPM0.5 / RPM100) at a temperature of 20 ° C. of the surface impregnated material is preferably 30 to 60, more preferably 35 to 55, still more preferably 38 to 52, and particularly preferably 40 to 50. Here, the TI value is a value (ratio) obtained by dividing the viscosity obtained at the rotation speed of 0.5 rpm by the viscosity obtained at the rotation speed of 100 rpm in the above-described viscosity measurement, and represents a thixotropic coefficient. When the TI value at a temperature of 20 ° C. of the surface impregnated material is in the above range, the sagging prevention function functions more reliably and the workability is improved.

The coating amount of the surface impregnating material is preferably 100 to 500 g / m ² , more preferably 150 to 400 g / m ² , further preferably 200 to 375 g / m ² , and particularly preferably 250 to 350 g / m ^2. a m ^2. The surface-impregnated material of this embodiment can be applied in the above-described application amount by one application to the structure. By applying at such an application amount, the balance between the above-described alkoxysilane permeability and sag prevention properties is further improved, and repellent properties that sufficiently suppress the penetration of moisture, salt, carbon dioxide, etc. in the vicinity of the structure surface. An aqueous layer can be formed. Moreover, it is excellent also in workability.

  The method for producing a surface impregnated material of the present embodiment includes a step of mixing a powdered higher fatty acid amide and a solvent to obtain a paste-like higher fatty acid amide, a step of mixing alkoxysilane and a pasty higher fatty acid amide, It is preferable to provide.

  In the step of mixing the powdered higher fatty acid amide and the solvent to obtain the pasty higher fatty acid amide, the mixing is preferably performed while heating to 40 ° C. or higher.

  The stirrer used in the step of mixing the alkoxysilane and pasty higher fatty acid amide is not particularly limited as long as it can be uniformly mixed and dispersed. For example, a stirrer with high shearing force such as a dissolver should be used. Is preferred. The dispersion time is preferably set to a time during which higher fatty acid amide aggregates are not visually confirmed.

<Structure>
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 for various structures. Since the structure of this embodiment has a water-repellent layer formed by reacting with the surface impregnating material, it suppresses or prevents the penetration of moisture, salt, carbon dioxide, etc., and has a structure with excellent durability over a long period of time. Can be maintained.

  2. 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. It is especially preferable that it is 5 mm or more. It is preferable to select an alkylalkoxysilane having 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 structure according to this embodiment is preferably 80% or more, and more preferably 85% 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.

  Hereinafter, the present invention will be described in more detail with reference to 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 80% 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 is 2.2mm or more and permeability suppression ratio did not meet one or both of 80% or more . Also, alkoxysilane 16-19 ^{wherein R 1} has a glycidoxy group or a methacryloxy group, impregnation depth does not satisfy the above conditions 2.2 mm. Furthermore, the alkoxysilane 19 did not satisfy the condition that the water permeation suppression ratio was 80% 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 80% of both conditions It was.

(Example 1, Comparative Example 1)
[Materials used]
The raw materials shown in the following (1) to (6) were prepared.

(1) Higher fatty acid amide A: 26 carbon atoms, shape (paste), higher fatty acid amide content: 10% by mass, butyl acetate content: 70% by mass, total content of ethanol and methanol: 20% by mass
B: Carbon number 22, shape (paste-like), higher fatty acid amide content: 30% by mass, solvent content mainly composed of benzyl alcohol: 70% by mass
C: Carbon number 18, shape (powder), higher fatty acid amide content: 100% by mass
(2) Phosphate ester, shape (powder)
(3) Hydrogenated castor oil, shape (powder)
(4) Aromatic amide, shape (powder)
(5) Fumed silica A: average particle diameter 80 nm, shape (powder)
B: Average particle diameter 12 nm, shape (powder)
(6) Porous silica A: Average particle diameter 3.9 μm, shape (powder)
B: Average particle diameter 2.7 μm, shape (powder)

  Surface impregnation materials were blended in the proportions shown in Tables 3 and 4 with the above-mentioned (1) to (6) and the alkoxysilane 14 of Table 1. The numerical values in the higher fatty acid amides A and B in Table 3 indicate parts by mass that do not contain a solvent.

[Preparation of surface impregnating material]
The formulations shown in Table 3 and Table 4 were prepared so that the surface impregnating material was 500 g.

  For example, the surface impregnated material 1 uses higher fatty acid amide A. Since the higher fatty acid amide contained in the higher fatty acid amide A is 10% by mass, 15.1 parts by mass of the higher fatty acid amide A is added to 100 parts by mass of the alkoxysilane. When 500 g of the surface impregnated material 1 is prepared, the alkoxysilane is 434.4 g and the higher fatty acid amide A is 65.6 g.

  A specific method for preparing the surface impregnated material 1 is as follows. First, 65.6 g of higher fatty acid amide A was added to 200 g of alkoxysilane, and the mixture was stirred with a stirrer until there was no pasty mass to obtain a dispersion. It was confirmed by visual observation that the dispersion was uniformly dispersed. Next, 234.4 g of the remaining alkoxysilane was added to the dispersion and stirred for about 10 minutes to obtain 500 g of the surface impregnated material 1. The surface impregnation materials 2 to 5 using the higher fatty acid amide A or the higher fatty acid amide B were similarly prepared.

  In the surface impregnating material 6, 11.11 parts by mass of higher fatty acid amide C is added to 100 parts by mass of alkoxysilane. When 500 g of the surface impregnated material 6 is prepared, the alkoxysilane is 450.0 g and the higher fatty acid amide is C50.0 g.

  A specific method for preparing the surface impregnated material 6 is as follows. First, 200 g of alkoxysilane and 50.0 g of higher fatty acid amide C were stirred with a stirrer to obtain a dispersion. It was confirmed by visual observation that the dispersion was uniformly dispersed. Next, 250.0 g of the remaining alkoxysilane was added to the dispersion and stirred for about 10 minutes to obtain 500 g of the surface impregnated material 6. Similarly, surface impregnation materials 7 to 14 using phosphate ester, hydrogenated castor oil, aromatic amide, fumed silica A, fumed silica B, porous silica A, or porous silica B are prepared. It was.

  Here, the stirrer is T.W. K. Robomix T. K. Homodisper 2.5 type (Primics Co., Ltd.) was used.

[Evaluation method of surface impregnated material]
The viscosity, TI value (thixotropy coefficient), sagging property, and storage property of each formulation of the prepared surface impregnated material were evaluated. The evaluation results are as shown in Table 5. Moreover, each evaluation was performed by the method shown below.

(1) Viscosity Viscosity at a rotational speed of 0.5 rpm, 20 rpm, and 100 rpm using a BH type viscometer (rotor No. 2) (B type viscometer BH manufactured by Toki Sangyo Co., Ltd.) at a temperature of 20 ° C. Was measured.
(2) TI value (RPM0.5 / RPM100)
The viscosity was obtained by dividing the viscosity at the rotation speed of 0.5 rpm by the viscosity at the rotation speed of 100 rpm.
(3) Sagging property A surface impregnating material is applied to a horizontally placed calcium silicate plate using an applicator so that the thickness is 225 μm in the horizontal direction. The presence or absence of flow in the direction was confirmed visually.
A: No sagging B: Almost sagging C: Sagging (4) Storage property The surface impregnated material was placed in a glass container and allowed to stand for 1 week, and the presence or absence of separation was visually confirmed.
A ... No separation C ... With separation

  As shown in Table 5, sagging occurred in Comparative Examples 1-1 to 1-4 using the surface impregnating materials 6 to 9. Moreover, in Comparative Examples 1-5 to 1-9 using the surface impregnating materials 10 to 14, the sagging property was good, but the storage property showed separation. Moreover, when the sagging property was confirmed about what was re-stirred so that the surface impregnation materials 10-14 which were stored and isolate | separated may become homogeneous, sagging generate | occur | produced.

  In Examples 1-1 to 1-5 of the surface impregnated materials 1 to 5, the viscosity (20 ° C.) at a rotation speed of 0.5 rpm was 1000 Pa · s or more. Moreover, the viscosity (20 degreeC) and TI value of rotation speed 20rpm were also favorable, and the favorable result was shown also about sagging property and storage property.

(Example 2, Example 3)
Using the surface impregnated material 5 in Table 3, the impregnation depth and the water permeation suppression ratio with respect to the mortar substrate and the concrete substrate were evaluated. The results are shown in Table 6 (mortar substrate) and Table 7 (concrete substrate). In Examples 2 and 3, the surface impregnated material was applied to the mortar substrate and the concrete substrate by a single roller application with the application amounts shown in Tables 6 and 7, and each test specimen was prepared. A method for producing a mortar substrate and a concrete substrate, and an evaluation method for each specimen are as follows.

[Production of mortar and concrete substrates]
It was produced in accordance with “5.1.1 Production of Mortar Substrate” and “5.1.2 Production of Concrete 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 6, in Examples 2-1 to 2-5 in which the surface impregnating material 5 was applied to the mortar substrate with each application amount, the impregnation depth was all 2.2 mm or more, and good results were obtained. Moreover, in Example 2-1, the water permeation suppression ratio was 80% or more, and good results were obtained.

  As shown in Table 7, in Example 3-1 in which the surface impregnation material 5 was applied to the concrete substrate, a better result was obtained in Example 2-1 applied to the mortar substrate in the impregnation depth and the water permeation suppression ratio. It was.

Example 4
Table 8 shows the results of evaluating the impregnation depth and the water permeation suppression ratio with respect to the mortar substrate using the surface impregnated material 2 of Table 3. In Example 4, the mortar substrate was installed so as to be a floor surface (lower surface), a wall surface (vertical surface), and a ceiling surface (upper surface), respectively, and the surface impregnating material was applied once by a roller with an application amount shown in Table 8. Each test body was prepared by coating on each mortar substrate. 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 8, in Examples 4-1 to 4-3 in which the surface impregnating material 2 was applied to the mortar substrate at each application amount, the impregnation depth was 2.2 mm or more on any application surface, and the water permeation suppression ratio was All were 80% or more, and good results were obtained.

  From the above, it is confirmed that the surface-impregnated material of each example can be applied in an appropriate amount by a single application operation even if the construction surface is a wall or a ceiling, and is excellent in suppressing sagging. It was done.

  ADVANTAGE OF THE INVENTION According to this invention, even if a construction surface is a wall or a ceiling, it is possible to apply | coat an appropriate amount by one application | coating operation | work, and can provide the surface impregnation material excellent in suppression of sagging. 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.

Claims (3)

Containing alkoxysilane, higher fatty acid amide, and solvent,
The alkoxysilane is at least one selected from the group consisting of phenyltriethoxysilane, hexyltriethoxysilane, and octylethoxysilane;
The content of the higher fatty acid amide is 0.8 to 2.5 parts by mass with respect to 100 parts by mass of the alkoxysilane.
The viscosity at a rotation speed of 20 rpm at a temperature of 20 ° C. is 350 to 700 mPa · s,
A surface-impregnated material having a TI value of 30 to 60 at a temperature of 20 ° C.   The surface-impregnated material according to claim 1, wherein the viscosity at a rotation speed of 0.5 rpm at a temperature of 20 ° C is 1000 mPa · s or more.   The structure obtained by apply | coating the surface impregnation material of Claim 1 or 2 to a structure surface.