JPH03151433A - Reinforcing method for construction member - Google Patents

Abstract

PURPOSE:To reinforce an inner wall and an outer wall through simple execution of work by charging a filler comprising an inorganic binder and aggregate as main components into space parts formed with structural members and finish plate members of construction member. CONSTITUTION:A filler 6 comprising an inorganic binder and aggregate as main components is charged into space parts formed with structural members 4 and finish plate members 1, 2 of construction member. For this inorganic binder, materials of hydraulicity such as portland cement, alumina cement, and gypsum are used. As for the aggregate, natural sand, an artificial light- weight aggregate, and an inorganic or organic foaming bead such as foaming glass bead are used. Rigidity of inner walls and outer walls is improved by simple execution of work, and furthermore by changing specific gravity or foaming rate of the filler 6, heat insulation property, soundproofing property, and fireproofing property are improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for reinforcing construction members, specifically, a method for reinforcing construction members,
Concerns methods for reinforcing internal and external walls of private residences, buildings, etc.

[Conventional technology and its issues]

Traditionally, construction materials used in architecture and civil engineering, such as the interior and exterior walls of apartment complexes, private residences, and buildings, are molded products that have their own functions. A frame part supported by structural members that are necessary for
A laminated structure consisting of metal plates, plywood, asbestos slate, gypsum board, cement board, etc. is generally used, and if necessary, insulation and soundproofing materials such as glass wool and rock wool are laminated. It is sealed inside the cavity of the part.

However, with this method, most of the stiffness of the wall is borne by the plate members, so although the plate members have high stiffness against forces in the shear direction, they have significantly low rigidity against forces in the bending direction of the plate members. As a result, bending and denting are likely to occur, and as a result, there are problems in that gaps are created at the joints with beams and columns, and the plate members are likely to crack or peel off.

On the other hand, in the case of houses of steel frame construction, reinforced concrete construction, steel-frame reinforced concrete construction, etc., the floor as a finishing board member is made of concrete, aerated concrete, inorganic molded board, etc. There are two ways to do this: by setting up an object and pasting plywood on top of it, or by laying plywood panels with height adjustment parts pre-attached, and then installing finishing materials such as tatami mats or carpets on this surface. However, due to the lack of rigidity in the bending direction of the panels, bending and creaking occur, and unevenness occurs at the joints because the floor plywood panels used as finishing board members are not integrated with the floor surface. There was a problem.

In addition, from the perspective of soundproofing and heat insulation, it is being considered to insert heat insulating materials and soundproofing materials into the gap between the floor surface of the structural member and the flooring material as the finishing board member, but it is necessary to maintain the levelness of the floor. However, it is difficult to fill it uniformly, and materials containing large amounts of fibers such as glass wool and rock wool are undesirable for moisture proofing under the floor, making it difficult to put them into practical use except for special purposes. there were.

In order to improve the 19tl properties of walls and floors, methods were used such as inserting a large amount of reinforcing materials inside or increasing the thickness of the boards used, but these methods are only effective when newly constructed. possible, and would require major renovations in existing buildings.

In addition, the use of many reinforcing materials inside walls and floors means that the space required to affix internal insulation and soundproofing materials is reduced.
In addition, the interior of walls and floors are divided into small spaces, which increases the number of areas where insulation and soundproofing materials are not filled, and furthermore, the layout of utility parts such as electrical wiring, water and gas piping, etc. There were issues such as a reduction in space.

The present inventor has completed the present invention by obtaining the knowledge that by using a specific filling material, it can be used in existing buildings without changing the current construction method, and a method for reinforcing internal and external walls is possible. reached.

[Means to solve the problem]

That is, the present invention provides a method for reinforcing a construction member, which comprises filling a void formed between a structural member and a finishing plate member of the construction member with a filler whose main components are an inorganic binder and aggregate. be.

The present invention will be explained in detail below.

The construction member in the present invention is a material used in architecture and civil engineering, and is itself a molded product with a function.

In addition, the structural members in the present invention refer to members necessary for buildings and constructions to stand on their own, and do not refer only to members such as columns, beams, and braces that are indispensable for the structural strength of buildings, but also to external walls. In addition to pillar-shaped and beam-shaped members necessary for installing internal walls, partition walls, waist walls, etc., it also includes floor surfaces.

Furthermore, the finished board members in the present invention include, for example, board materials such as metal plates, plywood, asbestos slate boards, gypsum boards, and cement boards, as well as plywood members such as finished floors installed on surfaces such as concrete. It includes.

In addition, the void formed by the structural members and plate materials of the construction material refers to the case where, in the case of wall members, the columnar or beam-like members are used as the frame part, and the plate-like members cover the frame part from both sides in a cylindrical shape. It refers to the inner hollow part sandwiched between the plate-like members of the part constructed by this.

In addition, in the case of floor members, it refers to the hollow area between the floor joist or similar material and the plywood panel surface in order to support the floor surface for structural strength and the floor material as a finishing board member, especially the finishing material.

Here, the frame portion refers to a portion of a structure such as a wooden structure or a steel structure, which is composed of columns and beams.

The inorganic binder in the present invention may be any material that has hydraulic properties, such as Portland cement, alumina cement, and Ceracola, and may also include mixed use of blast furnace slag, fly ash, silica hume, etc. within a range that does not impair physical properties. It is also possible to do so.

Further, from the viewpoint of improving workability, it is also possible to use a rapid hardening agent, a rapid hardening agent, an expanding agent, a setting retarder, a foaming agent, a foaming agent, a high performance water reducing agent, etc. in combination.

2. As a hardening agent, chlorides such as sodium silicate, sodium aluminate, and calcium chloride can be used.

As the rapidly hardening material, calcium aluminate materials can be used. In addition, alumina cement is used in portland cement. Although it can also be used as hardwood, it is not necessarily limited to this.

Expanding materials include calcium sulfur aluminate,
Any lime type can be used.

As the setting retarder, oxycarboxylic acids such as citric acid and gluconic acid, Pi, and the like can be used.

As the blowing agent, metal powders such as aluminum, magnesium and zinc can be used.

As the foaming agent, proteins such as saponin, gelatin, casein and malbumin, or derivatives thereof can be used.

As the high performance water reducing agent, β-naphthalenesulfonic acid formalin condensate, melamine sulfonic acid formalin condensate, sulfonated melamine condensate, etc. can be used.

In addition, the aggregate used in the present invention can be artificial lightweight aggregate filled with natural sand, inorganic type such as perlite and foamed glass beads, or organic type foamed beads.
In terms of weight reduction and improved heat insulation and sound insulation properties, materials with low bulk specific gravity such as perlite and foam beads are more preferable.

Furthermore, it is also possible to replace a part of the aggregate with rock wool, cotton, kraft pulp, glass fiber, rayon fiber, vinylon fiber, polypropylene fiber, etc.

The amount of aggregate used is 0.2 parts by weight of the inorganic binder.
~8 parts by weight, preferably 0.5 to 5 parts by weight.

If the amount is less than 0.2 parts by weight, the shrinkage of the filler after curing will be large, which may cause voids to be formed at the filling location.

If it exceeds 8 parts by weight, the strength of the filler tends to decrease and workability tends to decrease significantly.

Further, the amount of water is preferably 0.3 to 3 parts by weight, preferably 0.5 to 1.5 parts by weight, per 1 part by weight of the inorganic binder.

If it is less than 0.3 parts by weight, the injectability of the filler will decrease, and if it exceeds 3 parts by weight, there will be a significant decrease in strength after curing, as well as bleeding after filling, which tends to cause water leakage from the filling area. be.

The filler is manufactured by using an inorganic binder, aggregate, and water as essential ingredients, and then adding a foaming agent or foaming agent, etc., and mixing it at the construction site with a concrete mixer, mortar mixer, hand mixer, etc. , by pouring, or by injecting with a concrete pump or mortar pump. on the other hand,
In the process of injecting the filler, it is also possible to mechanically mix air, carbon dioxide gas, nitrogen gas, etc. and then fill the filler.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to Examples.

Example 1 FIG. 1 shows an example and a comparative example of the present invention, which were carried out using a part of a wall part used in a two-by-four construction method house. For implementation, JIS structural plywood, thickness 12 mm and plasterboard, JISA 6901 equivalent, were used as finished board members I and 2, netting material 3 was removed, and two-by-four building material 206HEM- was used as structural member 4 of the direct two-by-four construction method. It was carried out by attaching it directly to the FIR. In part (A) shown in the figure, a 100 mm thick heat insulating material 5 made by Asahi Fiberglass under the trade name "Mat Ace Silver 100" was installed inside the wall according to the conventional construction method. On the other hand, on the wall of part (B), Denka Super Cement 1
A foamed mortar was prepared by mixing 2 parts by weight of No. 7 silica sand as aggregate, 0.003 parts by weight of a protein foaming agent, and 0.45 parts by weight of water. Filling was performed using a mortar pump through a hole of 30 sφ drilled in the upper part of the wall at the center, and after filling was completed, the injection hole was covered with a silicone stopper to prevent mortar from leaking and drying, and was covered with a vinyl sheet for curing. Seven days after injection, each wall was pressed against the center of the wall with a load of approximately 30 kg from inside the building, and a dent of approximately 5 mm was observed in (A), but no dent was observed in (B). I was not able to admit. Also,
In order to examine the soundproofing performance, we struck the inner wall parts of (A) and (B) with a plastic hammer to examine the level of sound on the outer wall side. Compared to (A), (B) had a lower value by about 2 bones. I got it.

Example 2 The wall materials used in Example 1 were each 49.5x40c.
It was cut out to a size of m x 16.7 cn + thickness to prepare a specimen 7, and was attached to an electric furnace with an iron frame 8 having a thickness of 6 mm as shown in FIG. After that, 750
When heating at a temperature of °C and measuring the effect on the opposite side of the specimen from the electric furnace, in the example, smoke was generated after 23 minutes, and the surface temperature at that time was 25° above room temperature. C It was expensive. On the other hand, in the comparative example, smoke was generated after 8 minutes, and the surface temperature became 62° C. higher than room temperature after 23 minutes.

〔Effect of the invention〕

According to the present invention, the rigidity of internal and external walls can be improved without changing conventional construction methods and without performing large-scale renovation work on existing walls or floor materials. In addition to being able to provide reinforcement, by changing the specific gravity and foaming rate of the filler to be injected, it was also possible to improve heat insulation, visitor friendliness, and fire protection, making it possible to obtain an inexpensive reinforcement method.

[Brief explanation of the drawing]

1 and 2 show aspects of a first embodiment of the present invention, and FIG. 3 shows an aspect of a second embodiment of the present invention. FIG. 1 is a perspective view of a full-scale model of a wall portion used in the two-by-four construction method, and FIG. 2 is a sectional view taken along section a-b in FIG. 1. Moreover, FIG. 3 is a sectional view of the test piece attached to the electric furnace and the electric furnace used in Example 2. Code ■: Finished board member 1, JIS structural plywood, thickness 121: Finished board member 2, gypsum board, JIS A 6901 equivalent: Body batting material: II construction member, heating material: Filling material: Specimen: Iron frame :Electric furnace

Claims (1)

[Claims] 1) A method for reinforcing a construction member, which comprises filling a void formed between a structural member and a finishing plate member of the construction member with a filler whose main components are an inorganic binder and aggregate.