JP3244261B2 - Construction method of lightweight mortar-based refractory and fire-resistant coating material - Google Patents
Construction method of lightweight mortar-based refractory and fire-resistant coating materialInfo
- Publication number
- JP3244261B2 JP3244261B2 JP9522597A JP9522597A JP3244261B2 JP 3244261 B2 JP3244261 B2 JP 3244261B2 JP 9522597 A JP9522597 A JP 9522597A JP 9522597 A JP9522597 A JP 9522597A JP 3244261 B2 JP3244261 B2 JP 3244261B2
- Authority
- JP
- Japan
- Prior art keywords
- fire
- coating material
- lightweight mortar
- resistant coating
- cut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Building Environments (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は軽量モルタル系耐冷
耐火被覆材の施工法に係り、特に施工後における被覆材
塗布部でのクラックの発生防止を可能とする施工法の改
良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a lightweight mortar-based refractory and fire-resistant coating material, and more particularly to an improvement in an application method capable of preventing occurrence of cracks in a coating material application portion after application.
【０００２】[0002]
【従来の技術】石油精製、石油化学プラント、ＬＰＧ・
ＬＮＧプラント及び一般化学プラントの機器支持架台な
どの柱及び梁の耐冷耐火被覆、高層建築物の屋外露出部
の柱、梁などの耐火被覆等のため、従来より軽量モルタ
ル系耐冷耐火被覆材を上記柱、梁の全周に塗布する施工
法がとられている。上記被覆材としてはバーミキュライ
ト系の現場塗り込みタイプのもの、例えば、商品名マン
ドシールと称するものが使用されている。これは特殊加
工した焼成バーミキュライト粒とポルトランドセメント
を主成分とし、それに耐火性及び施工性を向上させるた
め、特殊な充填材と添加剤を加えてある。2. Description of the Related Art Petroleum refining, petrochemical plants, LPG /
Lightweight mortar-based cold-resistant fire-resistant coating materials are used in the past for cold-resistant fire-resistant coating of columns and beams such as equipment support bases of LNG plants and general chemical plants, and fire-resistant coatings of columns and beams on exposed outdoor parts of high-rise buildings. The construction method of applying to the entire circumference of columns and beams is adopted. As the covering material, a vermiculite-based in-situ coating type, for example, a product called Mand Seal (trade name) is used. It mainly comprises specially processed calcined vermiculite grains and Portland cement, and special fillers and additives are added to improve fire resistance and workability.
【０００３】その標準構成材料と重量％は下記の通りで
ある。 標準構成材料 重量％ バーミキュライト（発泡ひる石） …２０ セメント …４３ 炭酸カルシウム …３０ 耐火混和材及び増粘材 …７The standard constituent materials and weight percentages are as follows. Standard constituent materials wt% Vermiculite (foamed vermiculite) ... 20 Cement ... 43 Calcium carbonate ... 30 Refractory admixture and thickener ... 7
【０００４】また主な化学成分と重量％は下記の通りで
ある。 主な化学成分 重量％ ＳｉＯ2 …１６〜２０ ＣａＯ …２７〜３０ Ａｌ2Ｏ3 …４〜６ ＭｇＯ …５〜７ ＣａＣＯ3 …３０〜３２The main chemical components and weight percentages are as follows. The main chemical components wt% SiO 2 ... 16~20 CaO ... 27~30 Al 2 O 3 ... 4~6 MgO ... 5~7 CaCO 3 ... 30~32
【０００５】上述した材料はアスベストフリーで、下記
のような優れた特長がある。 （ａ）完全な無機質材料を使用しているため、燃焼しな
い。従って火災発生時に消火活動を妨げる煙、有毒ガス
や悪臭の発生もない。 （ｂ）鉄、コンクリート、レンガなど、ほとんどの下地
に良く接着し、火災時においても剥離しない。 （ｃ）温度変化、天候に対して影響されない。The above-mentioned materials are asbestos-free and have the following excellent features. (A) It does not burn because it uses a completely inorganic material. Therefore, there is no generation of smoke, toxic gas or odor that hinders fire fighting in the event of a fire. (B) It adheres well to most substrates, such as iron, concrete, and bricks, and does not peel off in the event of a fire. (C) Insensitive to temperature changes and weather.
【０００６】図３は鉄骨柱１１に前記被覆材１２をこて
塗りで塗布した例で、１３はブロンクアンカー（接着
材）、１４はエキスパンドメタル（補強金網）である。FIG. 3 shows an example in which the coating material 12 is applied to the steel column 11 by trowel coating. Reference numeral 13 denotes a bronch anchor (adhesive), and reference numeral 14 denotes an expanded metal (reinforcing wire mesh).
【０００７】[0007]
【発明が解決しようとする課題】上述した被覆材は前記
のような優れた特長を有するものであるが、柱、梁への
施工経過後、その被覆材の乾燥収縮、外気温度の変化、
振動等による鉄骨の変位等で被覆材塗布部の表面にクラ
ックが発生する。クラックが発生すると、外観が悪くな
るばかりでなく、性能が問題になる程の大きさとなるも
のもある。しかもクラックは施工後数か月して発生する
ため、それを補修する場合は足場等を架設する必要があ
り、高額の費用とかなりの日時を必要としていた。The above-mentioned covering material has the above-mentioned excellent characteristics. However, after the application to columns and beams, the drying and shrinkage of the covering material, changes in the outside air temperature,
Cracks occur on the surface of the coating material application portion due to displacement of the steel frame due to vibration or the like. When cracks occur, not only the appearance deteriorates, but also some of them become so large that performance becomes a problem. In addition, since cracks occur several months after construction, scaffolding and the like must be erected when repairing the cracks, requiring high cost and considerable time and date.
【０００８】本発明の目的はかかる課題を解決するた
め、前記軽量モルタル系耐冷耐火被覆材の施工後のクラ
ック発生防止のための改良された施工法を提供すること
である。An object of the present invention is to provide an improved construction method for preventing the occurrence of cracks after construction of the lightweight mortar-based refractory and fire-resistant coating material in order to solve such problems.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、請求項１の発明は、建造物の屋外露出部の柱及び梁
等に軽量モルタル系耐冷耐火被覆材を塗布する施工法に
おいて、施工時又は施工後に上記柱又は梁等の全周の被
覆材塗布部に所定間隔で切り目地部を設けることを要旨
とする。Means for Solving the Problems To achieve the above object, an invention according to claim 1 is a construction method for applying a lightweight mortar-based cold and fire-resistant coating material to columns and beams, etc. of an outdoor exposed part of a building. The gist of the present invention is to provide cut joints at predetermined intervals in the coating material application section on the entire circumference of the column or the beam at the time or after construction.
【００１０】請求項２の発明は、請求項１の発明におい
て、上記切り目地部には耐火目地材を挿入し、表面を防
水処理することを要旨とする。[0010] The invention of claim 2 is the gist of the invention of claim 1, wherein a fireproof joint material is inserted into the cut joint portion, and the surface is waterproofed.
【００１１】請求項３の発明は、請求項１又は２の発明
において、上記切り目地部の幅を５〜３０ｍｍとするこ
とを要旨とする。[0011] The invention of claim 3 is the gist of the invention of claim 1 or 2, wherein the width of the cut joint portion is 5 to 30 mm.
【００１２】[0012]
【発明の実施の形態】本発明の実施の形態としては、前
記マンドシールのような軽量モルタル系耐冷耐火被覆材
で、屋外建造物の柱又は梁の全周に塗布する施工時に、
又はその施工後に上記柱又は梁の全周の被覆材塗布部に
適当な間隔（約３〜６ｍピッチ）で切り目地部を設け
る。この切り目地部には、セラミックファイバーのよう
な耐火目地材を挿入し、表面をコーキング材で防水処理
し、また切り目地部の幅は約５〜３０ｍｍとする。この
ように切り目地部を適当な間隔で設ければ、前記クラッ
クの発生は防止できる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, a lightweight mortar-based cold and fire-resistant coating material such as the above-mentioned mand seal is applied to the entire periphery of pillars or beams of an outdoor building.
Alternatively, after the construction, cut joint portions are provided at appropriate intervals (approximately 3 to 6 m pitch) in the coating material application portion on the entire circumference of the column or beam. A fire-resistant joint such as a ceramic fiber is inserted into the joint, and the surface is waterproofed with a caulking material. The width of the joint is about 5 to 30 mm. By providing the cut joints at appropriate intervals in this manner, the occurrence of the crack can be prevented.
【００１３】[0013]
【実施例】以下に本発明の実施例を説明する。図１は本
発明の施工法の一実施例を示すもので、１は屋外建造物
の柱２及び梁３の全周の被覆材塗布部に設けた切り目地
部である。切り目地部の幅ｔは約５〜３０ｍｍである。
切り目地部の構成は、例えば図２（ａ），（ｂ）のよう
にする。Embodiments of the present invention will be described below. FIG. 1 shows an embodiment of the construction method according to the present invention, wherein reference numeral 1 denotes a cut joint provided on a coating material application portion on the entire periphery of a pillar 2 and a beam 3 of an outdoor building. The width t of the cut ground is about 5 to 30 mm.
The configuration of the cut portion is, for example, as shown in FIGS. 2 (a) and 2 (b).
【００１４】図２（ａ）に示す切り目地部は、鉄骨５に
塗布された被覆材４の全厚さ（２５〜４０ｍｍ）にわた
って設けられ、耐火目地材６としてセラミックファイバ
ーが挿入され、その表面はシリコーン系、チオコール
系、又はウレタン系コーキング材で防水処理される。な
お、７は補強金網である。図２（ｂ）は切り目地の長さ
を被覆材４の厚さの１／２とした例である。切り目地部
の施工は、被覆材の塗布施工時でも、施工後（乾燥後）
のいずれでもよい。また被覆材としては前記マンドシー
ルに限定されるものではない。切り目地部の耐火、耐冷
試験の結果を下記に示す。The cut joint shown in FIG. 2 (a) is provided over the entire thickness (25 to 40 mm) of the coating material 4 applied to the steel frame 5, and a ceramic fiber is inserted as a fire-resistant joint material 6, and the surface thereof is provided. Is waterproofed with a silicone, thiochol or urethane caulking material. Reference numeral 7 denotes a reinforcing wire mesh. FIG. 2B is an example in which the length of the cut is set to の of the thickness of the covering material 4. The construction of the cut area is after application (after drying) even when applying the coating material
Either may be used. The covering material is not limited to the mand seal. The results of the fire resistance test and the cold resistance test at the cut joint are shown below.
【００１５】１．耐火試験 （１）試験条件（ＪＩＳ １３０４） 加熱装置：縦型電気炉 加熱条件：耐火試験温度曲線によるプログラム運転（１
時間耐火） マンドシール：２５ｍｍｔ 養生：施工後２８日気中養生 （２）試験体 試験体Ａ：切目地無し 試験体Ｂ：切目地（約２０ｍｍｔ） （３）試験結果 試験体ＢはＪＩＳ １３０４の耐火試験に合格した。1. Fire resistance test (1) Test conditions (JIS 1304) Heating device: Vertical electric furnace Heating condition: Program operation by fire resistance test temperature curve (1
Time fireproof) Mand seal: 25 mmt Curing: 28 days after construction (2) Specimen Specimen A: No cut area Specimen B: Notched area (approximately 20 mmt) (3) Test result Specimen B was used in the fire resistance test of JIS 1304. passed it.
【００１６】２．耐冷試験 （１）試験方法 試験容器内にＬＮ２（−１９０℃）を入れ、この中に試
験体を１時間浸漬する。試験体を取り出しマンドシール
の脱落の有無を確認する。 マンドシール：２５ｍｍｔ 養生：施工後２８日気中養生 （２）試験体 試験体Ａ：切目地無し 試験体Ｂ：切目地（約２０ｍｍｔ） （３）試験結果 試験体Ａ、試験体Ｂ、 全て脱落無し 試験体Ａにはクラックが発生し、Ｂにはクラック発生が
認められなかった。2. Cold resistance test (1) Test method Put LN2 (-190 ° C) in a test container, and immerse the test specimen in this for 1 hour. Take out the specimen and check if the mand seal has fallen off. Mand seal: 25mmt Curing: 28 days after construction (2) Specimen Specimen A: No cut area Specimen B: Cut area (about 20mmt) (3) Test result Specimen A, Specimen B, all dropped None Cracks occurred in test sample A, and no cracks were observed in B.
【００１７】[0017]
【発明の効果】以上説明したように本発明によれば、被
覆材の施工時又は施工後に切り目地部を設けることによ
り、被覆材塗布部表面でのクラックの発生は施工１年後
防止することができ、実用上の効果は多大である。As described above, according to the present invention, cracks can be prevented from being formed on the surface of the coating material one year after the coating material is formed by providing the cut joint portion at the time of or after the application of the coating material. And the practical effect is enormous.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の一実施例を示す施工状態概略図であ
る。FIG. 1 is a schematic view showing a construction state according to an embodiment of the present invention.
【図２】切り目地部の構成例を示す図である。FIG. 2 is a diagram illustrating a configuration example of a cut joint portion;
【図３】従来のマンドシール施工状態例を示す図であ
る。FIG. 3 is a view showing an example of a conventional mand seal installation state.
１ 切り目地部 ２ 柱 ３ 梁 ４ 被覆材 ５ 鉄骨 ６ 耐火目地部材 ７ 補強金網 ８ コーキング材 DESCRIPTION OF SYMBOLS 1 Cut joint part 2 Column 3 Beam 4 Covering material 5 Steel frame 6 Fireproof joint member 7 Reinforcing wire mesh 8 Caulking material
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０４Ｂ 103:44 Ｃ０４Ｂ 103:44 111:28 111:28 111:76 111:76 (56)参考文献 特開 平７−330403（ＪＰ，Ａ) 特開 平６−32666（ＪＰ，Ａ) 特開 平５−319942（ＪＰ，Ａ) 実開 平６−82231（ＪＰ，Ｕ) 実開 平３−15918（ＪＰ，Ｕ) 実開 昭53−513（ＪＰ，Ｕ) 実開 昭50−116917（ＪＰ，Ｕ) 実開 平３−15917（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) E04B 1/94 C04B 28/02 ────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. 7 Identification symbol FI C04B 103: 44 C04B 103: 44 111: 28 111: 28 111: 76 111: 76 (56) References JP-A-7-330403 ( JP, A) JP-A-6-32666 (JP, A) JP-A-5-319942 (JP, A) Actual opening Hei 6-82231 (JP, U) Actual opening Hei 3-15918 (JP, U) Actual opening Sho 53-513 (JP, U) Shokai 50-116917 (JP, U) Shohei Hei 3-15917 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) E04B 1 / 94 C04B 28/02
Claims (3)
モルタル系耐冷耐火被覆材を塗布する施工法において、
施工時又は施工後に上記柱又は梁等の全周の被覆材塗布
部に所定間隔で切り目地部を設けることを特徴とする軽
量モルタル系耐冷耐火被覆材の施工法。1. A construction method of applying a lightweight mortar-based refractory and fire-resistant coating material to columns, beams, and the like of exposed outdoor portions of a building,
A method for constructing a lightweight mortar-based cold and fire-resistant coating material, wherein cut joints are provided at predetermined intervals in a coating material application portion on the entire periphery of the column or the beam during or after the application.
し、表面を防水処理することを特徴とする請求項１記載
の軽量モルタル系耐冷耐火被覆材の施工法。2. The method according to claim 1, wherein a refractory joint is inserted into the joint and the surface is waterproofed.
ることを特徴とする請求項１又は２記載の軽量モルタル
系耐冷耐火被覆材の施工法。3. The method for applying a lightweight mortar-based cold and fire resistant covering material according to claim 1, wherein the width of the cut joint portion is 5 to 30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9522597A JP3244261B2 (en) | 1997-03-28 | 1997-03-28 | Construction method of lightweight mortar-based refractory and fire-resistant coating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9522597A JP3244261B2 (en) | 1997-03-28 | 1997-03-28 | Construction method of lightweight mortar-based refractory and fire-resistant coating material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10266398A JPH10266398A (en) | 1998-10-06 |
| JP3244261B2 true JP3244261B2 (en) | 2002-01-07 |
Family
ID=14131820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9522597A Expired - Lifetime JP3244261B2 (en) | 1997-03-28 | 1997-03-28 | Construction method of lightweight mortar-based refractory and fire-resistant coating material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3244261B2 (en) |
-
1997
- 1997-03-28 JP JP9522597A patent/JP3244261B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10266398A (en) | 1998-10-06 |
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