JPH02229752A - Cement composition - Google Patents
Cement compositionInfo
- Publication number
- JPH02229752A JPH02229752A JP5125089A JP5125089A JPH02229752A JP H02229752 A JPH02229752 A JP H02229752A JP 5125089 A JP5125089 A JP 5125089A JP 5125089 A JP5125089 A JP 5125089A JP H02229752 A JPH02229752 A JP H02229752A
- Authority
- JP
- Japan
- Prior art keywords
- lightweight aggregate
- vermiculite
- cement
- volume
- cement composition
- 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.)
- Pending
Links
- 239000004568 cement Substances 0.000 title claims abstract description 53
- 239000000203 mixture Substances 0.000 title claims abstract description 37
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 32
- 239000010455 vermiculite Substances 0.000 claims abstract description 32
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 18
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract description 6
- 239000010881 fly ash Substances 0.000 abstract description 4
- 239000011324 bead Substances 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000006260 foam Substances 0.000 abstract description 2
- 229920003002 synthetic resin Polymers 0.000 abstract description 2
- 239000000057 synthetic resin Substances 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 229910001562 pearlite Inorganic materials 0.000 abstract 1
- 239000005335 volcanic glass Substances 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000006378 damage Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229920002978 Vinylon Polymers 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、建築用部材として好適に使用される軽量セメ
ント形成体の成形に適したセメント組成物に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cement composition suitable for molding a lightweight cement-formed body suitably used as a building member.
（従来の技術）
近年、住宅の外装材、内装材および天井材等の建築用部
材として、軽量なセメント成形体が使用されている。こ
の種のセメント成形体は、例えば、ボルトランドセメン
ト、軽量骨材および水、さらに必要に応じて他の成分を
含むセメント組成物を所望の型に流し込んで硬化させる
ことにより調整される．このセメント成形体は、ある程
度硬化したところで型から取り出され、充分に硬化せし
めるが、連続生産ができず生産効率が悪い。そのため、
セメント成形体を押出成形によって調整できるように、
セメント組成物中の水の量を減少させてセメント成形体
の保形性を向上させる方法（乾式方法）が採用されてい
る。しかしながら、このように水の量を減少させて混練
したセメント組成物を押出成形機で成形する場合、相当
な高圧で押し出さなければならず、押出成形機内で材料
に、せん断、圧縮、曲げ等の高い外部応力が作用して、
軽量骨材が破壊され、これによる発熱、摩擦、流動性の
悪化等の原因で押出成形性か悪くなったり、また、得ら
れるセメント成形体の軽量化が充分に計れないという不
都合があった。そこで、軽量骨材が破壊されないような
押出圧力で成形する方法として、水量を増やして材料の
流動性の向上を図ったり、押出成形用のセメント組成物
が提案されたりしている（例えば、特開昭５８−１３２
５０５号公報参照）。(Prior Art) In recent years, lightweight cement molded bodies have been used as architectural members such as exterior materials, interior materials, and ceiling materials for houses. This type of cement molded body is prepared, for example, by pouring a cement composition containing Bortland cement, lightweight aggregate, water, and other components as necessary into a desired mold and hardening it. This cement molded body is removed from the mold after it has hardened to some extent and is sufficiently hardened, but continuous production is not possible and production efficiency is poor. Therefore,
So that cement molded bodies can be adjusted by extrusion molding,
A method (dry method) has been adopted in which the amount of water in a cement composition is reduced to improve the shape retention of a cement molded body. However, when a cement composition kneaded with a reduced amount of water is molded using an extrusion molding machine, it must be extruded at considerably high pressure, and the material is subjected to shearing, compression, bending, etc. in the extrusion molding machine. Due to high external stress,
There are disadvantages in that the lightweight aggregate is destroyed, resulting in heat generation, friction, deterioration of fluidity, etc., resulting in poor extrusion moldability, and in addition, it is not possible to sufficiently reduce the weight of the resulting cement molded product. Therefore, as methods for molding lightweight aggregates at extrusion pressures that do not destroy them, increasing the amount of water to improve the fluidity of the material and cement compositions for extrusion molding have been proposed (for example, Kaisho 58-132
(See Publication No. 505).
（発明が解決しようとする課題）
しかしながら、セメント組成物中の水量を増やした場合
、成形体のタレによる変形および寸法精度の悪化等、成
形面において不都合が生じる。また、従来の押出成形用
のセメント組成物は、該組成物に流動性を持たせた配合
とすることによって成形時の押出圧力の低下を図るもの
であるので、高い押出圧力を受けた場合、軽量骨材の破
壊が回避されないという不都合があった。(Problems to be Solved by the Invention) However, when the amount of water in the cement composition is increased, problems occur in the molding surface, such as deformation due to sagging of the molded product and deterioration of dimensional accuracy. In addition, conventional cement compositions for extrusion molding are designed to reduce the extrusion pressure during molding by giving the composition fluidity, so when subjected to high extrusion pressure, There was an inconvenience that destruction of the lightweight aggregate could not be avoided.
本発明は、係る実情に鑑みてなされたもので、押出成形
時に高圧が加わっても、軽量骨材の破壊を最小限に小さ
くし、水量を増すというような操作をすることなく、目
的の軽量化を図ることのできる押出成形用のセメント組
成物を提供することを目的としている。The present invention was made in view of the above circumstances, and even if high pressure is applied during extrusion molding, the destruction of the lightweight aggregate is minimized, and the desired lightweight aggregate can be achieved without the need for operations such as increasing the amount of water. The object of the present invention is to provide a cement composition for extrusion molding that can be used for extrusion molding.
（課題を解決するための手段）
本発明のセメント組成物は、軽量骨材に対してバーミキ
ュライトを容積比（バーミキエライト容積／軽量骨材容
積）０．０２以上１．０未満の割合で混合した混合物を
セメント材料中に混入したものである。(Means for Solving the Problems) The cement composition of the present invention mixes vermiculite to lightweight aggregate at a volume ratio (vermicierite volume/lightweight aggregate volume) of 0.02 or more and less than 1.0. This mixture is mixed into cement material.
（作用）
セメント材料中に、軽量骨材に対してバーミキュライト
を容積比（バーミキュライト容積／軽量骨材容積）０．
０２以上１．０未満の割合で混合した混合物を混入し、
これによって得られたセメント組成物を用いて押出成形
を行う。この際、バーミキュライトは保水性およびクッ
ション性に優れているため、押出圧力が高くなっても軽
量骨材の破壊を回避するとともに、セメント中に混入さ
れている過剰水を給水および保水して、押出機内部での
充分な流動性を確保する。また、バーミキュライト自体
が軽量であるため、軽量骨材とともに、成形体の軽量化
を促進する。さらに、バーミキュライトの融点が高温で
あるため、得られた成形体の耐火性が向上する。そして
、バーミキュライト自体の加工性が良いため、成形体の
釘打ち、穴開け、切断等の加工や、取付け性に優れたも
のが得られる。(Function) In the cement material, the volume ratio of vermiculite to lightweight aggregate (vermiculite volume/lightweight aggregate volume) is 0.
Mixing a mixture at a ratio of 02 or more and less than 1.0,
Extrusion molding is performed using the cement composition thus obtained. At this time, vermiculite has excellent water retention and cushioning properties, so it avoids the destruction of lightweight aggregates even when extrusion pressure is high, and also supplies and retains excess water mixed in cement to extrude. Ensure sufficient fluidity inside the machine. In addition, since vermiculite itself is lightweight, it promotes weight reduction of the molded body together with lightweight aggregate. Furthermore, since the melting point of vermiculite is high, the fire resistance of the obtained molded article is improved. In addition, since vermiculite itself has good workability, it is possible to obtain molded bodies that are easy to process such as nailing, drilling, and cutting, and that are easy to attach.
？実施例） 以下、本発明の実施例を図面を参照して説明する。? Example) Embodiments of the present invention will be described below with reference to the drawings.
本発明においてセメントは、通常使用されるものであれ
ば特に制限はなく、例えば、ボルトランドセメント、フ
ライアッシュセメント、高炉スラグセメント、シリカセ
メント等を使用する。In the present invention, the cement is not particularly limited as long as it is commonly used, and for example, boltland cement, fly ash cement, blast furnace slag cement, silica cement, etc. are used.
軽量骨材は、バーライト、シラスバルーン、フライアッ
シヱバルーン等の無機系軽量骨材やスチレンビーズのよ
うな合成樹脂発泡体を使用する。The lightweight aggregates used include inorganic lightweight aggregates such as barlite, shirasu balloons, and fly-ash balloons, and synthetic resin foams such as styrene beads.
バーミキュライトは、ＳｉＯ■， ＭｇＯ， Ａｆ２０
．を主成分とする雲母状の粘土鉱物で、軽量性、保水性
、クッション性、加工性、耐火性等に優れた物質である
。この、バーミキュライトの粒径としては、特にＩＯＯ
Ａ１〜１！ＩＩＩ１のものが分散性、製品表面性等から
考えて好ましい。また、バーミキュライトは、上記軽量
骨材に対して、容積比（バーミキュライト容積／軽量骨
材容１）で０，０２以上１．０未満の割合で配合する。Vermiculite is SiO■, MgO, Af20
．． It is a mica-like clay mineral whose main component is , and it is a substance with excellent lightness, water retention, cushioning properties, workability, fire resistance, etc. The particle size of this vermiculite is particularly IOO
A1~1! III1 is preferable in terms of dispersibility, product surface properties, etc. Further, vermiculite is mixed with the lightweight aggregate at a volume ratio (vermiculite volume/lightweight aggregate volume 1) of 0.02 or more and less than 1.0.
この容積比が１．０以上であると、バーミキュライトの
製品全体に占める割合が過剰となり、成形体の曲げ強度
が低下することになる。また、０．０２未満であると、
バーミキュライトの持つ軽量性、保水性、クッション性
、加工性、耐火性等が発揮できなくなる。If this volume ratio is 1.0 or more, the proportion of vermiculite in the entire product becomes excessive, and the bending strength of the molded product decreases. Also, if it is less than 0.02,
Vermiculite's lightness, water retention, cushioning properties, workability, fire resistance, etc., cannot be demonstrated.
軽量骨材や水のセメントに対する使用量は、軽盪セメン
ト成形体の製造において通常用いられる程度とされ、例
えばセメント１容量に対し軽量骨材を０．３容量以上用
いるのが好適であり、水についてはセメント１００重量
部に対し３０重量部以上用いるのが好適である。The amount of lightweight aggregate and water to be used in cement is set to the level normally used in the production of light agitation cement compacts.For example, it is preferable to use 0.3 volume or more of lightweight aggregate for 1 volume of cement; It is preferable to use 30 parts by weight or more per 100 parts by weight of cement.
また、必要に応じ、スラグ、フライアッシュ、ケイ砂、
その他の骨材やガラス繊維等の無機繊維、ビニロン繊維
等の有機繊維などの補強繊維が本発明セメント組成物に
適宜混合されてよい。In addition, slag, fly ash, silica sand,
Other aggregates, reinforcing fibers such as inorganic fibers such as glass fibers, and organic fibers such as vinylon fibers may be appropriately mixed into the cement composition of the present invention.
次に、本発明のセメント組成物およびこのセメント組成
物によって成形した成形体を、（ａ）セメント組成物の
調整、（ｂ）成形体の成形、（Ｃ）成形体の性能評価に
わけて順次説明する。また、比較対象とするものとして
従来のセメント組成物の比較例を示す。Next, the cement composition of the present invention and the molded body formed using this cement composition were sequentially divided into (a) preparation of the cement composition, (b) molding of the molded body, and (C) performance evaluation of the molded body. explain. In addition, comparative examples of conventional cement compositions are shown as comparison targets.
〔第１実験例〕
（ａ）セメント組成物の調整
上記処方の軽量セメント組成物の水以外の各成分をミキ
サー（アイリッヒミキサーＲＶＯ ２型二日本アイリッ
ヒ社製）に入れ、１０００ｒｐｍで２分間混合した。こ
れに水を加え、さらに１分間混合した後、混練機（オー
ガー式押出し混練機ｍｐ−１ｏｏ：宮崎鉄工社製）で充
分に混練して可塑性混練物を得た。[First Experimental Example] (a) Preparation of Cement Composition Each component of the lightweight cement composition with the above formulation other than water was placed in a mixer (Eirich mixer RVO 2 model 2 manufactured by Nippon Eirich Co., Ltd.) and mixed for 2 minutes at 1000 rpm. did. Water was added thereto, and the mixture was further mixed for 1 minute, and then sufficiently kneaded with a kneader (auger type extrusion kneader mp-1oo, manufactured by Miyazaki Tekko Co., Ltd.) to obtain a plastic kneaded product.
（ｂ）成形体の成形
開口部が第１図に示す成形体１の断面形状を有する中空
異形金型を真空押出成形機に取付け、この押出成形機に
（ａ）で得られた可望性混練物を供給し、押出成形によ
り、成形体（未硬化成形体）■の調整を行った。このと
きの押出圧力と単位時間当たりの押出量七を測定した。(b) A hollow deformed mold whose molding opening has the cross-sectional shape of the molded product 1 shown in FIG. The kneaded material was supplied and extrusion molded to prepare a molded article (uncured molded article) (2). At this time, the extrusion pressure and extrusion amount per unit time were measured.
押出圧力は、押出機のバレルから金型へ至る抵抗部の圧
力をプルドン管圧力ゲージで測定した。単位時間当たり
の押出量は、金型先端部から押し出される可塑性混練物
の体積で示した。そして、この成形体１は、室温で５時
間放置（前置き養生）した後、５０゜Ｃ、ＲＨ９５％以
上の雰囲気で１２時間養生した。The extrusion pressure was measured by measuring the pressure in the resistance section from the barrel of the extruder to the mold using a Prudhon tube pressure gauge. The amount of extrusion per unit time was expressed as the volume of the plastic kneaded material extruded from the tip of the mold. Then, this molded body 1 was left to stand at room temperature for 5 hours (preliminary curing), and then cured for 12 hours at 50° C. in an atmosphere with a RH of 95% or more.
（Ｃ）成形体の性能評価
（ロ）で得られた成形体１を２０゜Ｃの水中に４週間浸
漬した後、第２図に実線で示すように、成形体１の薄肉
部分（厚′さｔ＝１０ａｕ＋＋）を幅ｂ＝２５ｍｍ、長
さｊ！＝１１０＋＋ａのサイズの試験片１１に切断し、
１０５゜Ｃのギャーオーブンにいれて約１２時間乾燥後
、２４時間放冷した。これによって得られたサンプルを
９０ａｉの間隔で支持し、その中央部にオートグラフ（
島津製作所社製）を用い、２．５ｍｍＺ分の曲げ速度で
力を加え、次式によって曲げ強度を測定した。(C) Performance evaluation of the molded product (B) After immersing the molded product 1 obtained in (b) in water at 20°C for 4 weeks, the thin part of the molded product 1 (thickness width b = 25 mm, length j! Cut into test pieces 11 with a size of =110++a,
After drying for about 12 hours in a 105°C gear oven, it was left to cool for 24 hours. The samples obtained by this were supported at intervals of 90ai, and the autograph (
(manufactured by Shimadzu Corporation), force was applied at a bending speed of 2.5 mmZ, and the bending strength was measured using the following formula.
曲げ強度（ｋｇｆ／ｃｉ）＝３ＰＬ／２ ｂ ｔ”Ｐ：
最大荷重（ｋｇｆ）
Ｌ：支持間隔（ＣＩ）
ｂ：サンプルの幅（ｃｍ）
ｔ：サンプルの厚さ（ｃｍ）
また、［有］｝で得られた成形体１を室温に約，１週間
放置した後、第２図に示すように、成形体１の薄肉部分
（厚さｔ＝１０ｍ）を幅ｂ＝２５ｍｍ、長さｆ＝１１０
ｍｍのサイズの試験片１１に切断して新たなサンプルを
得た。このサンプルの寸法を測定し、次式により成形体
１の比重を測定した。Bending strength (kgf/ci) = 3PL/2 b t”P:
Maximum load (kgf) L: Support interval (CI) b: Width of sample (cm) t: Thickness of sample (cm) In addition, the molded body 1 obtained in [Yes] was left at room temperature for about one week. After that, as shown in FIG.
A new sample was obtained by cutting into test pieces 11 with a size of mm. The dimensions of this sample were measured, and the specific gravity of the molded body 1 was determined using the following formula.
比重＝板の重量／厚さＸ幅×長さ
また、軽量骨材の破壊状況については、（ｂ）で得られ
た成形体１の表面を電子顕微鏡で観察した。Specific gravity=Weight of plate/Thickness x Width x Length Also, regarding the state of destruction of the lightweight aggregate, the surface of the molded body 1 obtained in (b) was observed using an electron microscope.
さらに、成形体１の保形性については、第３図に示すよ
うに、℃）で得られた成形体１を一定時間放置した後、
成形体１の理論上の厚さＴ＝５０（ｍｍ）から実際の厚
さＹ（ｍｓ＋）を引いた差Ｘ＝５０−Ｙ（ｆｆｌｌｌ）
を測定することによって判断した。Furthermore, regarding the shape retention of the molded body 1, as shown in FIG.
The difference between the theoretical thickness T = 50 (mm) of the molded body 1 and the actual thickness Y (ms+) = 50 - Y (ffllll)
This was determined by measuring.
以上の結果を表１に示す。The above results are shown in Table 1.
〔第２実験例〕
第１実験例において、セメント組成物に対する水の量を
６０重量部から５０重量部に減らし、その他の条件を同
一にして実験を行った。なお、軽量骨材に対するバーミ
キュライトの容積比（バーミキュライト容積／軽量骨材
容積）は０．１８８である。[Second Experimental Example] In the first experimental example, the experiment was conducted by reducing the amount of water to the cement composition from 60 parts by weight to 50 parts by weight, and keeping the other conditions the same. Note that the volume ratio of vermiculite to lightweight aggregate (vermiculite volume/lightweight aggregate volume) is 0.188.
以上の結果を表１に示す。The above results are shown in Table 1.
〔第３実験例〕
第１実験例において、セメント組成物中のシラスバルー
ン４０重量部の代わりにスチレンビーズ２重量部を加え
、水の量を６０重量部から４０重量部に減らし、その他
の条件を同一にして実験をおこなった。なお、軽量骨材
に対するバーミキュライトの容積比（バーミキュライト
容積／軽量骨材容積）は０．３３６である。[Third Experimental Example] In the first experimental example, 2 parts by weight of styrene beads were added instead of 40 parts by weight of shirasu balloons in the cement composition, the amount of water was reduced from 60 parts by weight to 40 parts by weight, and other conditions were The experiment was conducted with the same values. Note that the volume ratio of vermiculite to lightweight aggregate (vermiculite volume/lightweight aggregate volume) is 0.336.
以上の結果を表１に示す。The above results are shown in Table 1.
〈第１比較例〉
第１実験例において、セメント組成物中のバーミキュラ
イトを抜き、水の量を６０重量部から５０重量部に減ら
し、その他の条件を同一にして実験を行った。<First Comparative Example> In the first experimental example, an experiment was conducted by removing vermiculite from the cement composition, reducing the amount of water from 60 parts by weight to 50 parts by weight, and keeping other conditions the same.
以上の結果を表１に示す。The above results are shown in Table 1.
〈第２比較例）
第２実験例において、セメント組成物中のバーミキュラ
イトを抜き、水の量を５０重量部から４０重量部に減ら
し、その他の条件を同一にして実験を行った。(Second Comparative Example) In the second experimental example, an experiment was conducted by removing vermiculite from the cement composition, reducing the amount of water from 50 parts by weight to 40 parts by weight, and keeping other conditions the same.
以上の結果を表１に示す。The above results are shown in Table 1.
〈第３比較例〉
第１実験例において、セメント組成物中のバーミキュラ
イトを３０重量部から１重量部に減らし、水の量を６０
重量部から４０重量部に減らし、その他の条件を同一に
して実験を行った．なお、軽量骨材に対するバーミキュ
ライトの容積比（バーミキュライト容積／軽量骨材容積
）は０．００８６である。<Third Comparative Example> In the first experimental example, the amount of vermiculite in the cement composition was reduced from 30 parts by weight to 1 part by weight, and the amount of water was reduced to 60 parts by weight.
The experiment was conducted by reducing the weight from 40 parts by weight and keeping the other conditions the same. Note that the volume ratio of vermiculite to lightweight aggregate (vermiculite volume/lightweight aggregate volume) is 0.0086.
以上の結果を表１に示す。The above results are shown in Table 1.
〈第４比較例〉
第１実験例において、セメント組成物中のバーミキュラ
イトを３０重量部から２００重量部に増やし、水の量を
６０重量部から１３０重量部に増やし、その他の条件を
同一にして実験を行った。<Fourth Comparative Example> In the first experimental example, the amount of vermiculite in the cement composition was increased from 30 parts by weight to 200 parts by weight, the amount of water was increased from 60 parts by weight to 130 parts by weight, and other conditions were kept the same. We conducted an experiment.
なお、軽量骨材に対するバーミキュライトの容積比（バ
ーミキュライト容積／軽量骨材容積）は１．７２である
．
以上の結果を表１に示す。The volume ratio of vermiculite to lightweight aggregate (vermiculite volume/lightweight aggregate volume) is 1.72. The above results are shown in Table 1.
（以下余白）
成形性
軽量骨材の破壊廣
表
Ｏ：良好 Δ：若干変流が生じる ×：変流、成形難Ｏ
・ほとんどなし Δ：半数程度 ×：ほとんど全部以上
の第１実験例ないし第３実験例および第１比較例ないし
第４比較例の結果より、軽量骨材とバーミキュライトを
併用して押出成形することにより、高い押出圧力で押し
出しても軽量骨材の破壊度が小さいため、軽量の成形体
１を成形できることがわかる．また、押出成形後の成形
体１は形状維持性に優れ、硬化するまでに変形すること
がなく、養生硬化して得られた製品は、軽量であり、か
つ曲げ強度に優れていることがわかる。(Left below) Fracture width of moldable lightweight aggregate O: Good Δ: Slight flow change occurs ×: Current flow, difficult to form O
・Almost none Δ: Approximately half ×: Almost all of the results of the first to third experimental examples and the first to fourth comparative examples show that by extrusion molding using a combination of lightweight aggregate and vermiculite. It can be seen that the lightweight compact 1 can be formed because the degree of destruction of the lightweight aggregate is small even when extruded at high extrusion pressure. In addition, it can be seen that the molded product 1 after extrusion molding has excellent shape retention and does not deform before curing, and the product obtained by curing and curing is lightweight and has excellent bending strength. .
（発明の効果）
以上述べたように、本発明によると、軽量でかつ高強度
で防火性に優れたセメント成形体を提供することができ
る。また、押出成形において押出圧力が高くなっても、
軽量骨材の破壊を回避し、押出機内部での充分な流動性
を確保して、押出成形性、保形性に優れたセメント成形
体を容易に製造することができる。(Effects of the Invention) As described above, according to the present invention, it is possible to provide a cement molded body that is lightweight, has high strength, and has excellent fire resistance. In addition, even if the extrusion pressure increases in extrusion molding,
By avoiding destruction of the lightweight aggregate and ensuring sufficient fluidity inside the extruder, it is possible to easily produce a cement molded body with excellent extrudability and shape retention.
第１図ないし第３図は、本発明のセメント＆Ｉｌ成物に
よって押出成形された成形体の図面を示し、第１図は押
出成形により得られる成形体の一例を示す中空構造の成
形体の正面図、第２図は同斜視図、第３図は保形状態の
判定基準を説明するための成形体の正面図である。
特許出願人 積水化学工業株式会社
代表者 廣田 馨Figures 1 to 3 show drawings of a molded body extruded with the cement & lium composition of the present invention, and Figure 1 is a front view of a hollow-structured molded body showing an example of the molded body obtained by extrusion molding. FIG. 2 is a perspective view of the same, and FIG. 3 is a front view of the molded body for explaining the criteria for determining the shape-retaining state. Patent applicant: Kaoru Hirota, Representative of Sekisui Chemical Co., Ltd.
Claims (1)
ミキュライト容積／軽量骨材容積）０．０２以上１．０
未満の割合で混合した混合物をセメント材料中に混入し
たことを特徴とするセメント組成物。1) Volume ratio of vermiculite to lightweight aggregate (vermiculite volume/lightweight aggregate volume) 0.02 or more 1.0
1. A cement composition characterized in that a mixture is mixed into a cement material at a ratio of less than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5125089A JPH02229752A (en) | 1989-03-02 | 1989-03-02 | Cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5125089A JPH02229752A (en) | 1989-03-02 | 1989-03-02 | Cement composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02229752A true JPH02229752A (en) | 1990-09-12 |
Family
ID=12881705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5125089A Pending JPH02229752A (en) | 1989-03-02 | 1989-03-02 | Cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02229752A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002038516A1 (en) * | 2000-11-10 | 2002-05-16 | Mitsubishi Shoji Construction Materials Corporation | Composition for building material and building material |
| JP2004169449A (en) * | 2002-11-21 | 2004-06-17 | Toa Doro Kogyo Co Ltd | Paving body and formation method for the same |
| JP2007106671A (en) * | 2007-01-12 | 2007-04-26 | Mitsubishi Shoji Construction Materials Corp | Building material composition |
| JP2007126356A (en) * | 2007-01-12 | 2007-05-24 | Mitsubishi Shoji Construction Materials Corp | Composition for building material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6177687A (en) * | 1984-09-22 | 1986-04-21 | エスケ−化研株式会社 | High refractory properties composition |
-
1989
- 1989-03-02 JP JP5125089A patent/JPH02229752A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6177687A (en) * | 1984-09-22 | 1986-04-21 | エスケ−化研株式会社 | High refractory properties composition |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002038516A1 (en) * | 2000-11-10 | 2002-05-16 | Mitsubishi Shoji Construction Materials Corporation | Composition for building material and building material |
| JP2004169449A (en) * | 2002-11-21 | 2004-06-17 | Toa Doro Kogyo Co Ltd | Paving body and formation method for the same |
| JP2007106671A (en) * | 2007-01-12 | 2007-04-26 | Mitsubishi Shoji Construction Materials Corp | Building material composition |
| JP2007126356A (en) * | 2007-01-12 | 2007-05-24 | Mitsubishi Shoji Construction Materials Corp | Composition for building material |
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