JP2008115026A - Cement formulation, tiled wall and determination method of cement formulation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cement formulation which can be easily and correctly determined to be a cement formulation of the specific kind, and also to provide a tiled wall using the cement formulation. <P>SOLUTION: The cement formulation includes cement and fine aggregate and is characterized by further including coloring fine particles which are used for the determination of the hardened cement product of the above cement formulation. A sample is taken out from a wall and dissolution treatment is carried out with hydrogen chloride. The residue is observed by a microscope to find the presence of the coloring particles. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cement composition for forming a tile base, a tile wall using the cement composition, and a method for discriminating whether a tile base or the like is formed of a predetermined cement composition. And about.

  In order to prevent peeling of the tile, it is important to properly form a mortar base. For that purpose, it is necessary to use a cement composition having a composition suitable for tile foundation formation, add an appropriate amount of water so as to achieve a specified water cement ratio, knead, and coat with cocoon. Therefore, in recent years, a cement preparation for a tile base is commercially available from a tile manufacturer, and it has been recommended that a tile builder use the cement composition.

  From such a background, it is desired to be able to confirm at the time of occurrence of a peeling accident that the foundation of the constructed tile wall is formed of a designated cement composition.

In JP-A-11-1354, a fluorescent dye is mixed with a concrete powder additive to determine whether or not the placed concrete contains the additive based on the presence or absence of fluorescence. A method is described.
JP-A-11-1354

  Even if the fluorescent dye is mixed in the additive as in JP-A-11-1354, the amount is very small when viewed from the whole cement preparation, and it is difficult to accurately discriminate by producing clear fluorescence. is there. In addition, mixing a large amount of dye is disadvantageous in cost and may cause poor curing.

  An object of this invention is to provide the cement composition which can determine easily and correctly whether it is a predetermined cement composition, and the tile wall using this cement composition. It is another object of the present invention to provide a method capable of easily and accurately determining whether a cement hardened material such as a tile base is formed using a predetermined cement formulation. .

  The cement preparation of the present invention (Claim 1) contains a colored fine particle for discriminating that it is a cement hardened product using the cement preparation in a cement preparation containing cement and fine aggregate. It is characterized by this.

  The cement formulation according to claim 2 is characterized in that, in claim 1, the colored fine particles are colored silica sand.

  A cement composition according to claim 3 is characterized in that in claim 2, silica sand is colored by baking an inorganic pigment on the silica sand.

  A cement composition according to claim 4 is the cement composition according to any one of claims 1 to 3, wherein the colored fine particles have an average particle size of 0.02 to 0.5 mm and a content of 0.2 to 5%. It is characterized by this.

  A cement preparation according to claim 5 is characterized in that, in any one of claims 1 to 4, the colored fine particles are chromatic or black.

  A cement preparation according to claim 6 is characterized in that, in any one of claims 1 to 4, the colored fine particles are red.

  A cement composition according to a seventh aspect is the cement composition according to any one of the first to sixth aspects, which is a mortar cement composition for forming a tile base.

  The tile wall of the present invention (invention 8) is a tile wall in which a tile foundation is formed on a wall surface with a cement composition, and a tile is pasted thereon, and the cement composition is any one of claims 1 to 7. It is the cement formulation as described in the item.

  In the method for discriminating a cement composition according to the present invention (Claim 9), after collecting a portion of a hardened cement material, it is crushed, the crushed material is dissolved with an acid, and the residue is observed under a microscope, so The presence or absence is discriminated, and it is discriminated whether it is a hardened cement formed by a cement preparation containing colored fine particles.

  In the present invention, since the colored fine particles are contained in the cement composition, it is determined whether or not the colored fine particles are contained in the tile base, so that the tile base is formed by the cement composition of the present invention. Whether or not can be determined accurately and easily.

  In order to make this determination, a sample is taken from a hardened cement material such as a tile wall, crushed, dissolved with an acid, and observed with a microscope to determine whether the residue contains colored fine particles.

  The colored fine particles are preferably colored silica sand, and silica sand colored by baking an inorganic pigment is excellent in durability and is suitable.

  When inorganic pigment fine particles having an average particle diameter of 0.02 to 0.5 mm are used and the mixing ratio is 0.2 to 5%, the colored fine particles are hardly observed with the naked eye, whereas the microscope According to observation, fine inorganic pigment particles are clearly recognized.

  The present invention is suitable for discriminating a cement composition used for a tile base, but can also be used for discriminating a cement composition used for concrete.

  Hereinafter, the present invention will be described in more detail.

  The cement formulation of the present invention contains cement, fine aggregate and colored fine particles. As the cement of the cement composition for tile base, early-strength cement is suitable, but normal Portland cement, white cement, or the like may be used. The amount of cement in the cement composition for tile base is preferably 45 to 65% by weight, particularly preferably about 50 to 60% by weight.

  As the fine aggregate, silica sand may be used, but a lightweight fine aggregate such as perlite may be further contained.

  The average particle size of the silica sand as the fine aggregate is preferably about 0.05 to 0.5 mm.

  In the case of a cement composition for tile base, the amount of silica sand as fine aggregate is preferably 15 to 25% by weight, particularly 18 to 22% by weight. The blending amount of pearlite is preferably 1 to 5% by weight, particularly 2 to 4% by weight.

  As the colored fine particles, fine particles colored in chromatic colors such as red, blue, yellow, and green, which are easily noticeable, or black are preferable, and among them, fine particles colored in red that are easily identified with a microscope are preferable.

  The average particle size of the fine particles is preferably about 0.02 to 0.5 mm.

  Silica sand is suitable as the material for the fine particles. In order to color quartz sand, it is preferable to bake an inorganic pigment. The colored layer formed on the silica sand surface by baking an inorganic pigment is robust and does not fade over a long period of time. In order to bake the inorganic pigment on the silica fine particles, a mixture of the inorganic pigment and a glass component (for example, sodium silicate component) of a slight amount (for example, about 10 to 50% by weight of the inorganic pigment) is made into a slurry, and the silica sand fine particles are contained in this slurry. After dipping, it is preferably pulled and dried, and then fired at about 500 to 700 ° C. By adjusting the adhesion amount of the inorganic pigment, the color density can be adjusted.

  Bengala is preferred as the red inorganic pigment. Cobalt or the like is suitable as the blue inorganic pigment, Aode or the like is suitable as the yellow inorganic pigment, and carbon black or the like is suitable as the black inorganic pigment.

  The colored fine particles are not limited to silica sand colored with an inorganic pigment, and fine particles obtained by crushing or pulverizing colored rocks such as iron ore and zircon sand may be used.

  The content of the colored fine particles in the tile base cement composition is preferably about 0.2 to 5% by weight, particularly about 0.5 to 2.0% by weight.

  The cement formulation of the present invention may contain other formulations. For example, calcium carbonate may be added to improve fire resistance, whiteness, adjustment of shrinkage rate, and the like. Further, in order to prevent cracking of the mortar, a fiber such as nylon may be blended. Furthermore, you may mix | blend additives, such as a water retention agent, workability | operativity improving agent, a water reducing agent, and AE agent.

  In order to form a mortar base using the cement composition of the present invention, water is added to the cement composition so that the water-cement ratio is 40 to 60%, and the mixture is kneaded, and then applied to the wall surface with a wrinkle. After curing until the mortar has a predetermined strength, it is tiled using an elastic adhesive.

  In order to confirm whether or not the base is formed using the cement composition of the present invention when a tile peeling accident occurs, a part of the base is collected with a chisel, etc. After pulverizing to a diameter of 10 mm or less, for example, an average particle diameter of about 5 to 10 mm, placing in an acid, preferably 10% hydrochloric acid, stirring while heating as necessary to dissolve and remove cement components and calcium carbonate, and then washing with water Then, it may be dried and observed with a microscope to determine the presence or absence of colored fine particles.

  Examples and comparative examples will be described below.

Example 1
A cement formulation of the following formulation was prepared by weighing each material and then mixing with a blender.
Early strength cement 55 parts by weight Silica sand (average particle size 0.1 mm) 19.5 parts by weight Colored silica sand (red, average particle size 0.1 mm) 0.5 parts by weight Calcium carbonate 20 parts by weight Perlite (average particle size 1.5 mm) ) 3 parts by weight Workability improver 2 parts by weight Water retention agent 0.12 parts by weight Add 32 parts by weight of water to 100 parts by weight of this cement preparation and knead. Formed.

  After 3 days, the tile base surface made of this mortar was tiled using an elastic adhesive.

  Further, 100 g of a sample was collected by covering a part of the tile base surface. After this was crushed with a hammer, 10 g was taken out, poured into 10% hydrochloric acid, and stirred at room temperature for 1 hour to dissolve the cement components.

Thereafter, the residue was filtered off, washed with water and dried. The surface of the dried product was observed with a 150 × microscope and photographed. As a result, it was recognized that an average of 50 red fine particles were dispersed per 1 cm ^{2 of} the photograph.

Comparative Example 1
In Example 1, a cement formulation having the same formulation was prepared except that the colored silica sand was not added to the cement formulation.

  Water was added to the cement formulation at the same water cement ratio as described above, and the mixture was kneaded and applied to the wall surface. Three days later, a sample was collected, similarly subjected to crushing and hydrochloric acid dissolution treatment, and the residue was observed under a microscope, but no red fine particles were observed.

  From this Example and Comparative Example, it was recognized that according to the present invention, it can be easily and reliably determined whether the mortar is a predetermined cement formulation.

Claims (9)

  A cement preparation containing cement and fine aggregate, comprising a colored fine particle for discriminating that it is a hardened cement using the cement preparation.   The cement preparation according to claim 1, wherein the colored fine particles are colored silica sand.   The cement preparation according to claim 2, wherein the silica sand is colored by baking an inorganic pigment on the silica sand.   The cement preparation according to any one of claims 1 to 3, wherein the colored fine particles have an average particle size of 0.02 to 0.5 mm and a content of 0.2 to 5%.   The cement preparation according to any one of claims 1 to 4, wherein the colored fine particles are chromatic or black.   The cement preparation according to any one of claims 1 to 4, wherein the colored fine particles are red.   The cement composition according to any one of claims 1 to 6, wherein the cement composition is a mortar cement composition for forming a tile base.   8. A tile wall in which a tile base is formed on a wall surface with a cement composition, and a tile is attached thereon, and the cement composition is the cement composition according to any one of claims 1 to 7. And tile wall.   A portion of the hardened cement material was collected and then crushed, the crushed material was dissolved with acid, and the residue was observed with a microscope to determine the presence or absence of colored fine particles. A method for discriminating a cement composition, comprising discriminating whether the cement is a cured product.