JP2005307502A - Fireproof door frame and inorganic reinforcing material for filling fireproof door frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide inorganic reinforcing material for filling a fireproof door frame, having excellent fluidity, quick drying property and lightweight property, easily filling up a hollow part of a door frame disposed in the periphery of a door board and hardening the same, and giving fireproof performance to the door frame. <P>SOLUTION: This inorganic reinforcing material for filling up the fireproof door frame includes: cement mixed with hydraulic aluminates compound; aggregate; and aluminum powder. The viscosity in the lapse of twenty minutes after the hydrolytic start is 4 to 200 dPa s, the surface hardness in the lapse of one hour after the hydrolytic start is 1 MPa or higher, and preferably the absolute dry density after curing is 400 to 1,400 kg/m<SP>3</SP>. The hollow part of the door frame is filled up with the inorganic reinforcing material for filling up the fireproof door frame and the material is cured to obtain the fireproof door frame 2 produced in a factory and disposed in the periphery of the fireproof door board 1, lightweight and having excellent fireproof performance. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an inorganic reinforcing material filled in a hollow portion of a fireproof door frame, and a fireproof door frame filled with the inorganic reinforcing material.

  With the enforcement of the Building Standards Law and the enforcement order revised in June 2000, fireproof materials and fireproof structures have been clarified, and fireproof doors have been adopted as building doors. There are many things to do.

  As shown in FIG. 1, the fireproof door is a fireproof door frame disposed on the outer periphery of the fireproof door plate 1 in order to join and improve the airtightness of the fireproof door plate 1 that is opened and closed and the opening housing 3 of the building. It consists of two. The material of the fireproof door plate 1 is generally made of iron, but there is also a wooden door whose surface and / or inside is specially treated. On the other hand, the fireproof door frame 2 is generally made of iron regardless of whether the fireproof door plate 1 is made of metal or wood, and has a structure having a hollow portion therein.

  When attaching a fireproof door to an opening housing of a building, when the housing is a wet wall, for example, as shown in FIG. 2, the fireproof door frame 2 is welded and joined to a reinforcing bar 4a embedded in the RC housing 4 in advance. Then, the method of filling the mortar 5 and closing the hollow part of the fireproof door frame 2 and the gap between the fireproof door frame 2 and the RC housing 4 is generally used.

  When the housing is a dry wall, for example, as shown in FIG. 3, it is attached in advance to the fireproof door frame 2 on the door frame mounting channel material 6a disposed in the inner hollow portion of the wall plate material 6 such as a calcium silicate plate. The attached mounting plate 2a is welded and joined with the mounting hardware 6b. Due to the difference in construction method, it is not necessary to fill anything in the hollow portion of the fireproof door frame 2 in the dry type wall. However, the fireproof door frame 2 constructed in a hollow state may be filled with a heat insulating material such as rock wool because of poor sound insulation performance.

  As for fireproof performance as a fireproof door, it goes without saying that the fireproof performance of both the fireproof door plate and the fireproof door frame must be satisfied, but the most important means for improving the fireproof performance of the fireproof door frame is in the event of a fire. It is to suppress the deformation of the frame caused by the heat of.

  In the case of the wet wall mounting method shown in FIG. 2, the mortar 5 is filled in the hollow portion of the fireproof door frame 2 to increase the structural strength. Even if the frame steel material is softened by heat at the time of fire, the mortar in the frame Since 5 is not softened or deformed, deformation of the fireproof door frame 2 is suppressed. However, since filling the refractory door frame 2 with the mortar 5 is carried out at a construction site, there are problems associated with complicated operations such as installation of a kneading mixer and installation of a dirt prevention sheet due to mortar scattering. Moreover, since the filling operation of the mortar 5 is generally performed from a slight gap with the RC housing 4 after the refractory door frame 2 is installed, the mortar 5 is filled into the hollow portion of the refractory door frame 2 having a complicated shape. It was difficult to fill the upper horizontal part of the fireproof door frame 2 and the mortar 5 was liable to have a defect.

  On the other hand, in the case of the method of attaching to the dry wall shown in FIG. 3, the hollow portion of the fireproof door frame 2 is not filled with anything, or is only filled with a heat insulating material such as rock wool having no structural strength. Therefore, the fireproof door frame 2 is likely to be deformed by heat during a fire. Therefore, in order to suppress the deformation of the refractory door frame 2, a new steel material is added to the hollow portion of the refractory door frame 2 and / or the number of joints between the refractory door frame 2 and the housing is increased. There is a need to take measures.

  In addition to the above-mentioned general fireproof door frame, there is also a fireproof door frame composed only of cement and mortar. For example, in Japanese Utility Model Publication No. 55-2954, water is added to cement and sand, and if necessary, aggregate is added and kneaded, poured into a mold and cured, and then demolded. A fireproof door frame to be manufactured is described. However, such a refractory door frame composed only of cement and mortar is susceptible to cracking because it is vulnerable to impacts such as opening and closing of the door, and has a problem that its workability to the frame is extremely poor because of its high density.

  Further, although Japanese Patent Publication No. 7-99067 proposes a door frame filled with a heat-crosslinking melanin resin, although the resistance to impact is improved, Similarly, since the density is high and heavy, there is a problem that workability is remarkably poor. Also, Japanese Patent Publication No. 51-11859 and Japanese Utility Model Publication No. 58-44778 describe door frames filled with fiber materials such as glass fiber, but in the same way as in the case of conventional dry wall mounting methods. The fireproof performance is not enough.

Japanese Utility Model Publication No. 55-2954 Japanese Patent Publication No. 7-99067 Japanese Patent Publication No. 51-11859 Japanese Utility Model Publication No. 58-44778

  In view of such conventional circumstances, the present invention is excellent in fluidity, quick drying, and light weight, and can be easily filled into a hollow portion even with a door frame having a complicated shape, and is efficient even in the case of factory production. An object of the present invention is to provide an inorganic reinforcing material for filling a fireproof door frame that can be produced and can provide sufficient fireproof performance to the door frame.

  In addition, by using the inorganic reinforcing material for filling the refractory door frame, it can be produced at the factory and transported to the construction site for easy construction, and mounting on the wet wall reduces complicated and difficult work associated with filling the reinforcing material. It is also intended to provide a fire-resistant door frame that is light in weight and excellent in workability during transportation and installation, and that can suppress the increase in the number of reinforcing steel materials and joints that are disadvantageous in terms of cost when installed on a dry wall. To do.

In order to achieve the above object, the inorganic reinforcing material for filling a fireproof door frame provided by the present invention includes cementum mixed with a hydraulic aluminate compound, aggregate, and aluminum powder, and 20 minutes from the start of addition. The subsequent viscosity is 4 to 200 dPa · s, and the surface hardness after 1 hour from the start of addition is 1 MPa or more. The inorganic reinforcing material for filling a fireproof door frame of the present invention preferably has an absolute dry density after curing in the range of 400 to 1400 kg / m ³ .

The present invention also provides a fireproof door frame characterized in that the inorganic reinforcing material for filling a fireproof door frame of the present invention is filled and cured in a hollow portion of the fireproof door frame. That is, it contains hydraulic cement, aggregate, and aluminum powder, the viscosity after 20 minutes from the start of water addition is 4 to 200 dPa · s, and the surface hardness after 1 hour from the start of water addition is 1 MPa or more. Preferably, the fireproof door frame filling inorganic reinforcing material having an absolutely dry density in the range of 400 to 1400 kg / m ³ after being cured is filled and cured in a hollow portion of the fireproof door frame. Provide a frame.

  According to the present invention, it is excellent in fluidity, quick-drying, and light weight, and can be easily filled into a hollow part of a fire-resistant door frame having a complicated shape without any defective part, whether in factory production or on-site construction. Further, it is possible to provide an inorganic reinforcing material for filling a fireproof door frame that has excellent structural strength and heat resistance after curing and can suppress deformation of the door frame due to heat at the time of fire.

  Moreover, by using the inorganic reinforcing material for filling the fireproof door frame of the present invention, it is possible to produce the fireproof door frame by filling the door frame at the factory as well as when constructing the door frame at the construction site. Therefore, the installation to the wet wall eliminates the complicated and difficult filling work of the inorganic reinforcing material in the hollow part of the door frame, only the filling work to the gap between the housing and the door frame, and the installation to the dry wall Since it is possible to suppress the increase in the number of reinforcing steel materials and the number of joints with the frame, which is disadvantageous in terms of cost, not only is it lightweight and high-strength, it has excellent fire resistance, but also has excellent workability such as shortening the installation time. A door frame can be provided.

  The inorganic reinforcing material for filling a refractory door frame in the present invention contains, as main components, cementum mixed with a hydraulic aluminate compound, aggregate, and aluminum powder. As the cement, Portland cement excellent in strength retention after curing is preferable. Moreover, as an aggregate, what was conventionally used for the mortar may be used, for example, ALC powder, silica sand, pearlite, etc. can be used.

  Furthermore, the inorganic reinforcing material for filling a fireproof door frame of the present invention contains a hydraulic aluminate compound. The hydraulic aluminate compound has an effect of increasing the curing rate of cementum and shortening the curing time. As the hydraulic aluminate compound, aluminate such as calcium aluminate and calcium sulfoaluminate, limestone, bauxite, gypsum, or a molten mixture thereof containing these can be used.

  The inorganic reinforcing material for filling a refractory door frame of the present invention having such a composition becomes a slurry excellent in fluidity by adding water and kneading. Therefore, it can be easily poured into the hollow part of the door frame in the door frame installation work at the construction site or the door frame manufacturing process in the factory, and even a door frame with a complicated shape can be filled without a defective part. Is possible. In particular, if a fireproof door frame is manufactured by filling in a factory, it is only necessary to fill the gap between the frame and the fireproof door frame when constructing at a construction site, so that troublesome filling work can be reduced.

  The viscosity of the inorganic reinforcing material for filling the refractory door frame is about 4 to 200 dPa · s at the point of 20 minutes from the start of the addition of water for slurrying because the filling work into the hollow part of the door frame requires about 20 minutes at the maximum. And This is because, when the viscosity of the slurry at the time of 20 minutes from the start of the addition of water is less than 4 dPa · s, the aggregate is settled and uniform filling cannot be achieved. Moreover, when the viscosity of the slurry at the time of 20 minutes from the start of the addition exceeds 200 dPa · s, the viscosity becomes too high and it becomes difficult to pour into the hollow portion of the door frame.

  The inorganic reinforcing material for filling a refractory door frame of the present invention has an excellent quick-drying property because a hydraulic aluminate compound is added to and mixed with cement as well as the above excellent fluidity. In other words, the hydro-kneaded inorganic reinforcing material slurry can be cured in a short time after filling the hollow part of the door frame, and therefore, the production time can be shortened and the production efficiency can be improved, especially in mass production at the factory. Can be made. In order to obtain such quick drying properties, the amount of the hydraulic aluminate compound added is preferably in the range of 5 to 20 parts by weight with respect to 100 parts by weight of the inorganic reinforcing material for filling the refractory door frame. It is also possible to further adjust the curing time by adding a coagulation adjusting agent such as sodium citrate.

  The inorganic reinforcing material for filling a refractory door frame of the present invention having the above-mentioned quick-drying property has a surface hardness of 1 MPa or more at one hour from the start of addition. If the door frame is moved when the surface hardness does not reach 1 MPa, the inorganic reinforcing material is cracked by a slight impact, which causes the inorganic reinforcing material to drop off or peel off after curing. In addition, if the time until the surface hardness reaches 1 MPa exceeds 1 hour, the production efficiency of the fireproof door frame is lowered, which makes it unsuitable for factory production.

  Furthermore, the inorganic reinforcing material for filling a refractory door frame of the present invention can generate fine bubbles by adding aluminum powder and prevent cracks due to shrinkage after construction. Further, the generation of fine bubbles promotes weight reduction and at the same time helps prevent cracks and chips due to impact. In addition, the addition amount of aluminum powder has the preferable range of 0.02-0.10 weight part with respect to 100 weight part of inorganic reinforcement materials for fireproof door frame filling.

  The above-described inorganic reinforcing material for filling a fireproof door frame of the present invention is sufficient by filling and curing the hollow portion of the door frame as slurry in the door frame manufacturing process in a factory or when installing the door frame in a factory. A fireproof door frame with fireproof performance can be obtained. In particular, the inorganic reinforcing material for filling the refractory door frame of the present invention not only has sufficient strength after curing, but also has excellent fluidity and quick-drying properties in a hydrated slurry state, so it has the required fire resistance performance. It becomes possible to produce the fireproof door provided in the factory.

Since the fireproof door frame produced in the factory needs to be transported to the construction site, it is desired that the fireproof door frame be light enough not to reduce the transport efficiency. Therefore, it is desirable that the inorganic reinforcing material for filling a fireproof door frame of the present invention is excellent in lightness, and specifically, the dry density after curing is preferably in the range of 400 to 1400 kg / m ³ .

That is, when a fireproof door plate and a fireproof door frame are set as one set, a maximum of 39 sets can be loaded on a 4t truck bed. However, since the weight of one general fireproof door plate is about 30 kg and the weight of one door frame before filling with inorganic reinforcement is about 29.1 kg, the weight is 4 t when a maximum of 39 sets are loaded. In order not to exceed 1, the absolute dry density of the inorganic reinforcing material needs to be 1400 kg / m ³ or less. In addition, if the absolute density of the inorganic reinforcing material is less than 400 kg / m ³ , the structural strength is lowered, and particularly when it is attached to a dry wall, it becomes impossible to suppress an increase in the reinforcing steel material and the joining points, which is costly. Disadvantageous.

  Aggregate and aluminum powder were added to the cementum mixed with a hydraulic aluminate compound, and a thickener, a dispersant, and a suspicion modifier were added to prepare an inorganic reinforcing material of the present invention example. Specifically, 10% by weight of a hydraulic aluminate compound, 35% by weight of ordinary Portland cement, 40% by weight of silica sand and 15% by weight of pearlite as an aggregate were mixed to obtain a powder composition of 100% by weight as a whole. To this powder composition, 0.01% by weight of aluminum powder, 0.1% by weight of thickener, 0.5% by weight of dispersant, and 0.2% by weight of a coagulation adjusting agent are all divided. Then, water at 25 ° C. was further added to make a slurry having a water content of 46% by weight.

  As the hydraulic aluminate compound, a molten mixture of limestone, bauxite and gypsum containing 25% by weight of hydraulic calcium aluminate or hydraulic calcium sulfoaluminate in terms of alumina was used. Specifically, a soil-stabilized hard material manufactured by Denka Co., Ltd. was used as the molten mixture. Silica sand is SS-100A manufactured by Sarawak Sand Co., Ltd., and pearlite is 1B and T3 manufactured by Showa Chemical Co., Ltd. Aluminum powder is fine aluminum No. 470 manufactured by Daiwa Aluminum Co., Ltd., thickener is Marporose manufactured by Matsumoto Yushi Co., Ltd., dispersing agent is a mole master manufactured by Showa Denko KK, and setting agent is Denka Co., Ltd. Denka setter D-100 made from was used.

  By filling the obtained slurry of the inorganic reinforcing material of the present invention into a hollow portion of a steel material having the same shape as the door frame and having a length of 1 m, the fluidity, quick-hardness, and lightness were evaluated. Is shown in Table 1 below. That is, for evaluation of fluidity, the viscosity was measured using a VT-04E type visco tester manufactured by Rion Co., Ltd., and the value at the time of 20 minutes from the start of addition was evaluated. Moreover, the filling state after hardening was observed and the number of the defect | deletion parts used as the cavity was measured.

  In addition, the evaluation of fast-curing was measured using a 012 load shaft in a 9550B load cell load detection type earth pressure gauge manufactured by Aiko Engineering Co., Ltd., and the time from the start of water addition until the surface hardness reached 1 MPa was measured. . Moreover, 1 hour after the start of water addition, the door frame filled with the slurry was dropped from a height of 5 cm onto the concrete floor, and the number of cracks and chips generated was measured. Further, the lightness was evaluated by the absolute dry density of the inorganic reinforcing material and the number of sets that can be loaded on a 4 t truck.

  The following comparative examples were also evaluated in the same manner as described above. Comparative Example 1 is a cement-based self-leveling material, “Finish Flow” manufactured by Ube Concrete Industry Co., Ltd. was used, and water was added at 22 ° C. with water at 25 ° C. Comparative Example 2 is a cement-based self-leveling material, “S Level” manufactured by Nippon Steel Blast Furnace Cement Co., Ltd. was used, and water was added at 22 ° C. with 25 ° C. water. Comparative Example 3 is a cement-based castable refractory, using “Ply Flow” manufactured by Japan Private Co., Ltd., water added at 10% by weight with 25 ° C. water, and 0.05% by weight of fluidity-retaining agent. Added. Comparative Example 4 is a cement-based castable refractory. “TOCAST” manufactured by Toshiba Ceramics Co., Ltd. was used, and water was added at 10% by weight with 25 ° C. water.

  As can be seen from the above results, the inorganic reinforcing material of the example of the present invention is excellent in all points of fluidity, fast curing, and lightness. On the other hand, the inorganic reinforcing materials of Comparative Examples 1 to 3 have a very long curing time and are inferior in quick-hardness, and are high in density and inferior in lightness. Moreover, although the inorganic reinforcing material of Comparative Example 4 is excellent in quick hardening, the viscosity is high and the fluidity is inferior, and the density is high and the lightness is also inferior.

It is a front view of a fireproof door. It is sectional drawing in the horizontal direction of the fireproof door attached to the housing of the wet wall. It is sectional drawing in the horizontal direction of the fireproof door attached to the housing of a dry-type wall.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fireproof door board 2 Fireproof door frame 2a Mounting plate 3 Opening housing 4 RC housing 4a Reinforcement 5 Mortar 6 Wall board material 6a Door frame mounting channel material 6b Mounting hardware

Claims (3)

An inorganic reinforcing material to be filled in the hollow part of the fireproof door frame, including a cementum mixed with a hydraulic aluminate compound, an aggregate, and an aluminum powder, and having a viscosity of 4 to 200 dPa 20 minutes after the start of water addition An inorganic reinforcing material for filling a refractory door frame, which is s and has a surface hardness of 1 MPa or more after 1 hour from the start of water addition. 2. The inorganic reinforcing material for filling a refractory door frame according to claim 1, wherein an absolute dry density after curing is in a range of 400 to 1400 kg / m ³ . A fireproof door frame, wherein the inorganic reinforcing material for filling a fireproof door frame according to claim 1 or 2 is filled and cured in a hollow portion of the fireproof door frame.

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