JPH05239803A - Facing method for concrete - Google Patents

Abstract

PURPOSE:To improve working efficiently by placing concrete containing the aggregates of specified grain size, on foundation material, and by pushing the facing aggregates of grain size larger than that of the aggregates into the concrete from the surface before the concrete is hardened, to set the facing aggregates to be hardened. CONSTITUTION:On a foundation concrete layer 12, concrete 14 including aggregates 13 consisting of stones and the like for the average grain size of 0.2-15mm is placed. After that, before the concrete 14 is hardened, the facing aggregates 15 of grain size larger than that of the aggregates 13 are placed on the surface, and pressure is applied to, and the partial section of the facing aggregates 15 is pushed into the concrete 14, and is hardened to be set. As a result, the facing aggregates 15 can be efficiently set.

Description

Detailed Description of the Invention

[0001] The present invention relates to a method for fixing pebbles and the like on concrete. Generally, on the outer wall of a building, such as a boardwalk, a park, a garden, a front door of a restaurant, a road in front of a restaurant, a museum, a gymnasium, a museum, etc., on the outer wall of the building, as shown in FIG. Decorative concrete has been used with a portion of the decorative aggregate embedded in the concrete. In this specification,
The structure shown in FIG. 1 is simply referred to as decorative concrete.

Conventionally, decorative concrete has been manufactured by a so-called washing-out method.

The washing out method comprises the following steps. The foundation concrete layer 2 is provided on the crusher run 1. Crusher run 1 and foundation concrete layer are called foundation. The mortar layer 3 is provided on top of it, and the decorative aggregate 4 is placed on top of it.
Apply pre-grout mortar 5 containing. This state is shown in FIG. Then, a set retarder is sprinkled on the pre-grout mortar 5, and a curing plastic sheet 6 is put thereon. This state is shown in FIG. Then in summer 2 hours ~
The pre-grout mortar 5 is left to stand for 3 hours or 4 to 6 hours in winter to harden the portion of the pre-grout mortar 5 other than the surface. The surface of layer 5 will not cure due to the presence of the set retarder. The curing sheet is removed, and the mortar component existing on the mortar 5 without hardening is washed out with water to form decorative concrete. This state is shown in FIG.

However, the conventional washing-out method has the following drawbacks.

(1) The curing retarder must be sprayed uniformly, and the time for washing with the water from the spraying of the curing agent depends on the temperature. Therefore, this method must be performed by a skilled person.

(2) In the washing out step with water, a large amount of cement sludge flows out, and it is impossible to let this flow out to the sewer system. This is because the washed-out cement blocks the drainage pipe and is important. Therefore, the places where work is possible are very limited.

(3) Since the cement flows out to the bonded portion between the decorative aggregate and the mortar by washing with water, the important adhesive strength is lowered and the decorative aggregate is removed at an early stage.

(4) In the outermost mortar layer, a relatively large amount of expensive decorative aggregate 4 must be used.

(5) The curing sheet can be used only once,
Wastes resources.

The present inventors have conducted extensive research to overcome the drawbacks of the prior art for producing decorative concrete and completed the present invention.

According to the present invention, a concrete composition containing stone, cement, sand, water, resin, and a conventional additive for concrete having an average particle size of 0.2 to 15 mm is provided on a base material, and the concrete composition is added. A decorative aggregate having a particle size larger than the stone is placed on the surface of the concrete composition while the composition does not harden, and the decorative aggregate is placed at the same time as or after the decorative aggregate is placed in the concrete composition. The present invention relates to a concrete makeup method, which comprises applying a pressure to a part of the makeup aggregate to push it into the concrete composition and curing the concrete composition in that state. The present invention will be described in more detail with reference to the drawings.

A foundation concrete layer 12 is provided on the crusher run 11. Crusher run 1 and foundation concrete 2 are called foundation. The structure of the foundation is arbitrary,
Other structures may be used. A stone having an average particle size of 0.5 to 10 mm, preferably a stone 13 for building materials, a concrete composition 14 containing cement, sand, water, a resin and a usual additive for concrete is attached to the foundation. Decorative aggregates having an average particle size larger than the stone are manually placed on the concrete composition layer while the concrete composition is not hardening, or are sprinkled using a device such as a sieve. Large decorative aggregates may be placed or sprinkled in advance, and then small decorative aggregates may be placed or sprinkled. In this case, large decorative aggregates and small decorative aggregates are evenly distributed. This state is shown in FIG. When the stone is placed by hand, pressure may be applied to the stone to embed a portion of the stone in the concrete composition. Also, after placing stones by hand or spraying them for a while, pressure is applied to each stone one by one, or a large number of stones are pressed simultaneously with a flat plate to make a part of the decorative stone a concrete composition. It may be embedded in.

The present invention is characterized in that the surface concrete composition contains 0.2 to 15 mm of stone. If a mortar layer that does not contain stones is attached to the foundation, the decorative aggregate will fall into the mortar layer when pressure is applied to it. Further, when a decorative concrete is attached to the inclined surface, if a mortar layer that does not contain stone of an appropriate size is used, the decorative aggregate on the surface shifts and cannot be evenly embedded. The stone used as a building material is preferable, but it may be a stone for civil engineering. If the average stone size is less than 0.5, the effect of using stone is completely lost. If the average size of the stone exceeds 10 mm, the stone may come out on the surface when pressure is applied to the decorative aggregate.

A second aspect of the present invention is the use of a decorative aggregate having a larger average particle size than the stone in the concrete composition. Therefore, the decorative aggregate is not completely embedded in the concrete composition. The use of a decorative aggregate having a larger average particle size than the stone in the concrete composition means that if a stone having an average particle size of 2 mm is used, for example, a decorative aggregate exceeding 2 mm is used.

The thickness of the concrete composition (forming layer), the size of the stone, and the size of the decorative aggregate are generally related. For example, if the forming layer is thin, the stone size is also small, and the decorative aggregate size is also small. Preferred 1
An example is as follows.

Thickness of forming layer Size of stone Size of decorative aggregate 5 mm 0.2 to 0.5 mm 3 mm or less 10 mm 1-2 mm 3 to 6 mm 15 mm 2 mm 6 mm or more 25 mm 10 mm 15 to 30 mm Stone in concrete composition The amount of sand, cement, may be within the range of constituents in conventional concrete compositions.

The amount of building stone (aggregate) depends on the surface finish (whether the decorative material is dense or sparse), but is generally 0.5 to 4 times as much as the building stone (cement). Aggregate) is preferably used.

Effects of the present invention 1) No washing or wiping is required.

2) Since it is not washed with water, there is no surface laitance layer, and the effect is that the adhesive strength of the aggregate is high and the removal rate is reduced. Furthermore, white sinter is extremely small, which prevents white unevenness. 3) No sludge pollution of cement due to washing with water.

4) Because of the spraying method, the layer can be formed in one step without dividing into the intermediate coating layer and the mortar layer, and the efficiency is improved.

5) Since resin is mixed in the dispersion forming layer and the whole is made of resin mortar, the adhesion to the base and the adhesion of the surface layer aggregate are strengthened.

6) For the forming layer, an inexpensive aggregate different from the decorative aggregate can be used, which is economical.

7) No skill is required for construction. For example, if stone, sand, cement, and decorative aggregate are put on the market as a set, the person who bought the set can easily perform the work with a do-it-yourself carpenter.

8) Since no washing out is carried out, it is possible to carry out the construction in a renovated room without worrying about water leakage.

Formulation Example 1 Normal type In the case where the grain size of the decorative aggregate is 12 mm and the total thickness of the formation layer is 20 mm Construction stone 7 liters (stone) 15 kg Portland cement 8 kg Silica sand 8 kg SBR resin mixture 4 kg Water reducing agent 40 g Defoamer 12 g Cosmetic bone Material 12kg Mixing example 2 Normal type When the grain size of the decorative aggregate is 6mm and the total thickness of the formation layer is 10mm Building material stone 3kg (stone) 8kg Portland cement 5kg Silica sand 5kg SBR resin mixed liquid 2kg Water reducing agent 25g Defoamer 7g Cosmetic aggregate 5kg Mixing example 3 Early-strength type Washed with a 12mm grain size of decorative aggregate, total thickness of forming layer is 20m
In case of m Building stone 7kg (stone) 15kg Early strength cement 2kg Portland cement 6kg Silica sand 8kg SBR resin admixture 4kg Water reducing agent 30g Defoamer 12g Cosmetic aggregate 12kg

[Brief description of drawings]

1 is a sectional view of so-called decorative concrete,

FIG. 2 is an explanatory view of a conventional washing-out method,

FIG. 3 is an explanatory view of a conventional washing-out method,

FIG. 4 is an explanatory view of a conventional washing-out method,

FIG. 5 is a process intermediate diagram of the method of the present invention,

FIG. 6 is a decorative concrete obtained by the method of the present invention.

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[Procedure amendment]

[Submission date] May 6, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

Formulation example 1 Normal type When the grain size of the decorative aggregate is 12 mm and the total thickness of the formation layer is 20 mm (per m ² ) Building material stone 7 ri (stone) 15 kg Portland cement 8 kg Silica sand 8 kg SBR resin mixture 4 kg Water reducing agent 40 g Foaming agent 12 g Decorative aggregate 12 kg Blending example 2 Normal type Decorative aggregate particle size 6 mm and total thickness of formation layer 10 mm (per m ² ) Building material stone 3 ri (stone) 8 kg Portland cement 5 kg Silica sand 5 kg SBR resin admixture 2 kg Water-reducing agent 25 g Defoaming agent 7 g Decorative aggregate 5 kg Formulation example 3 Early-strength type Decorative aggregate with a particle size of 12 mm, washing layer total thickness 20 m
In case of m (per m ² ) Building stone 7 ri (stone) 15 kg Early strength cement 2 kg Portland cement 6 kg Silica sand 8 kg SBR resin admixture 4 kg Water reducing agent 30 g Defoamer 12 g Decorative aggregate 12 kg

Claims (2)

[Claims] 1. An average particle size of 0.2 to 1 on the base material.
A concrete composition containing 5 mm of stone, cement, sand, water and a conventional additive for concrete is attached, and a decorative aggregate having an average particle size larger than that of the stone is used while the concrete composition is not hardened. Placing it on the surface of the composition and applying pressure to the decorative aggregate at the same time as or after placing the decorative aggregate in the concrete composition, forcing part of the decorative aggregate into the concrete composition. , A concrete makeup method comprising curing the concrete composition in that state 2. The method of claim 1 wherein the decorative aggregate is dropped onto the concrete composition from above and thereafter pressure is applied to the decorative aggregate.