JPH08119703A - Hardened article of cement and its production - Google Patents

Hardened article of cement and its production

Info

Publication number
JPH08119703A
JPH08119703A JP24974894A JP24974894A JPH08119703A JP H08119703 A JPH08119703 A JP H08119703A JP 24974894 A JP24974894 A JP 24974894A JP 24974894 A JP24974894 A JP 24974894A JP H08119703 A JPH08119703 A JP H08119703A
Authority
JP
Japan
Prior art keywords
cement
hardened
water
polyether derivative
water retention
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.)
Withdrawn
Application number
JP24974894A
Other languages
Japanese (ja)
Inventor
Sadao Yabu
貞男 薮
Motoyuki Mizuno
素行 水野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP24974894A priority Critical patent/JPH08119703A/en
Publication of JPH08119703A publication Critical patent/JPH08119703A/en
Withdrawn legal-status Critical Current

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  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PURPOSE: To obtain a hardened article of cement capable of keeping water- holding capacity at a level higher than a specified value, and accordingly having a high flame resistance and improved strength by compounding cement as the main component with a polyether derivative as a forming assistant. CONSTITUTION: Cement as the main component is mixed with silica, etc., as aggregate and a vinylidene chloride-acrylonitrile copolymer, etc., as lightweight aggregate. A fibrous material such as pulp or asbestos as reinforcing material and further a specific water-soluble high polymer cement consisting of a polyether derivative as forming assistant are added to the obtained mixture in a ratio of 1-3wt.% based on the total weight of the cement and the aggregates. Subsequently, the obtained material is kneaded after adding water to obtain a cement component having >=95% of water-holding capacity. The obtained cement component is formed by extrusion. The formed article is aged and hardened to obtain the objective hardened article of cement.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、工場で製造されるセメ
ントの二次製品であるセメント硬化体及びその製造方法
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hardened cement product which is a secondary cement product manufactured in a factory, and a method for manufacturing the same.

【0002】[0002]

【従来の技術】従来よりセメントの二次製品であるセメ
ント硬化体は、板状や筒状に形成されて壁材や屋根材な
どの建築資材として利用されている。このセメント硬化
体は主成分であるセメントに骨材などの固形物や、石綿
及びパルプなどの繊維物質、着色剤等を加えてセメント
組成物を調製し、このセメント組成物を押出成形法、抄
造成形法、プレス成形法、注型成形法、遠心成形法など
の成形法で成形して所望の形状に形成されている。
2. Description of the Related Art Conventionally, a hardened cement product, which is a secondary cement product, is formed into a plate shape or a cylindrical shape and is used as a building material such as a wall material or a roof material. This hardened cement product is prepared by adding a solid substance such as aggregate, a fibrous substance such as asbestos and pulp, a colorant, etc. to cement as a main component to prepare a cement composition, and the cement composition is subjected to an extrusion molding method and papermaking. It is formed into a desired shape by molding by a molding method such as a molding method, a press molding method, a cast molding method, or a centrifugal molding method.

【0003】上記成形法のうち押出成形法による成形
は、連続的に中空形状の異型品を製造するのに適してい
るが、この押出成形法を用いてセメント硬化体を成形し
ようとする場合には、固形物や繊維物質だけで構成され
るセメント組成物では可塑性がなくて成形することがで
きないので、固形物や繊維物質にさらに成形助剤を配合
してセメント組成物を調製するようにし、セメント組成
物に可塑性を付与するようにしている。そしてこの成形
助剤としてはヒドロキシエチルメチルセルロース、ヒド
ロキシプロピルメチルセルロース、ヒドロキシブチルメ
チルセルロースなどのメチルセルロース(MC)やヒド
ロキシエチルエチルセルロースなどのセルロース誘導体
が用いられている。
Of the above-mentioned molding methods, the extrusion molding method is suitable for continuously producing atypical products having a hollow shape. However, when molding a hardened cement using this extrusion molding method, Since a cement composition composed only of solids and fiber substances cannot be molded due to lack of plasticity, a cement composition is prepared by further mixing a molding aid with the solids or fiber substances, It is designed to impart plasticity to the cement composition. As the molding aid, methyl cellulose (MC) such as hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, hydroxybutyl methyl cellulose, or a cellulose derivative such as hydroxyethyl ethyl cellulose is used.

【0004】[0004]

【発明が解決しようとする課題】しかし上記従来例のセ
メント硬化体では、成形助剤としてメチルセルロースな
どのセルロース誘導体を用いて形成してあるので、セメ
ント硬化体の燃焼時に可燃性の有機物であるメチルセル
ロースが燃焼して発熱量が多くなってしまい、高い不燃
性を得ることができなかった。このために可燃性の有機
物であるパルプなどの繊維物質の配合量が規制されて多
く配合することができなくなり、セメント硬化体の強度
の向上を図ることができなかった。
However, in the cement hardened body of the above conventional example, since it is formed by using a cellulose derivative such as methyl cellulose as a molding aid, methyl cellulose which is a combustible organic substance when the cement hardened body is burned. Was burned and the amount of heat generated increased, and high incombustibility could not be obtained. For this reason, the amount of fibrous material such as pulp, which is a combustible organic substance, is restricted and cannot be mixed in a large amount, so that the strength of the hardened cement product cannot be improved.

【0005】本発明は上記の点に鑑みてなされたもので
あり、高い不燃性を得ることができると共に強度の向上
を図ることができるセメント硬化体及びその製造方法を
提供することを目的とするものである。
The present invention has been made in view of the above points, and an object of the present invention is to provide a hardened cement product which can obtain high noncombustibility and can improve strength, and a method for producing the same. It is a thing.

【0006】[0006]

【課題を解決するための手段】本発明に係るセメント硬
化体は、セメントを主成分とし、成形助剤としてポリエ
ーテル系誘導体が配合された保水力が95%以上のセメ
ント組成物から成ることを特徴とするものである。本発
明にあって、1〜3重量%のポリエーテル系誘導体が配
合されたセメント組成物を用いることができる。
The hardened cement product according to the present invention comprises a cement composition containing cement as a main component and a polyether derivative as a molding aid and having a water retention capacity of 95% or more. It is a feature. In the present invention, a cement composition containing 1 to 3% by weight of a polyether derivative can be used.

【0007】本発明に係るセメント硬化体の製造方法
は、セメントを主成分とし、成形助剤としてポリエーテ
ル系誘導体を配合して調製した保水力が95%以上のセ
メント組成物を押出成形法で成形し、養生硬化すること
を特徴とするものである。以下本発明を詳述する。本発
明に用いるセメントとしては、普通ポルトランドセメン
ト、早強ポルトランドセメント、中庸熱ポルトランドセ
メントなどのポルトランドセメントや、高炉セメント、
シリカセメント、フライアッシュセメントなどの混合セ
メントを例示することができるが、普通ポルトランドセ
メントを用いるのが好ましい。
The method for producing a hardened cement product according to the present invention is an extrusion molding method using a cement composition containing cement as a main component and a polyether derivative as a molding aid and having a water retention capacity of 95% or more. It is characterized by being molded and cured by curing. The present invention will be described in detail below. As the cement used in the present invention, ordinary Portland cement, early strength Portland cement, Portland cement such as moderate heat Portland cement, blast furnace cement,
Examples of the mixed cement include silica cement and fly ash cement, but it is preferable to use ordinary Portland cement.

【0008】本発明に用いる骨材としては、通常使用さ
れる砂利や砕石、砂などを例示することができるが、比
表面積4000g/m2 程度の珪石粉を用いるのが好ま
しい。また本発明に用いる軽量骨材としては、軽石やさ
んご、けい藻土などの天然材料や、ひる石や中空セラミ
ック粒などの人工材料を例示することができるが、塩化
ビニリデンとアクリロニトリルの共重合体を用いるのが
好ましい。さらに本発明では有機繊維物質であるパルプ
や無機繊維物質の石綿などの繊維物質を補強材として用
いる。
As the aggregate used in the present invention, commonly used gravel, crushed stone, sand and the like can be exemplified, but it is preferable to use silica stone powder having a specific surface area of about 4000 g / m 2 . Examples of the lightweight aggregate used in the present invention include natural materials such as pumice, coral and diatomaceous earth, and artificial materials such as vermiculite and hollow ceramic particles. It is preferable to use a combination. Further, in the present invention, fibrous substances such as pulp which is an organic fibrous substance and asbestos which is an inorganic fibrous substance are used as a reinforcing material.

【0009】本発明に成形助剤として用いるポリエーテ
ル系誘導体としては、ポリエチレングリコールで構成さ
れるもの(例えば三洋化成工業(株)社製 NK−5
1)やポリオキシエチレンノニルフェニルエーテルで構
成されるもの(例えば三洋化成工業(株)社製 NK−
81)、ポリオキシエチレンオクチルフェニルエーテル
で構成されるもの(例えば三洋化成工業(株)社製 N
K−82)などを例示することができる。
The polyether derivative used as a molding aid in the present invention is composed of polyethylene glycol (for example, NK-5 manufactured by Sanyo Chemical Industry Co., Ltd.).
1) or polyoxyethylene nonylphenyl ether (for example, NK- manufactured by Sanyo Kasei Co., Ltd.)
81), composed of polyoxyethylene octyl phenyl ether (for example, N manufactured by Sanyo Kasei Co., Ltd.)
K-82) and the like can be exemplified.

【0010】そして上記セメント、骨材、軽量骨材、繊
維物質、ポリエーテル系誘導体、及び通常用いられる顔
料等の着色剤を所定量ずつ配合してミキサーなどで乾式
混合をおこない、この後水を加えてミキサーやニーダー
で混練することによって、保水力が95%以上のセメン
ト組成物を調製することができる。このセメント組成物
にはセメントと骨材の合計重量に対して1〜3重量%の
ポリエーテル系誘導体が配合されている。ポリエーテル
系誘導体の配合量が1重量%未満であれば保水力が低下
し、可塑性が不足して成形することができなくなり、ま
たポリエーテル系誘導体の配合量が3重量%を越えると
燃焼時に発熱温度が高くなって、後述する基材試験に合
格することができなくなるものである。ここで上記保水
力はポリエーテル系誘導体の種類や分子量等によって調
整することができるものである。このセメント組成物は
通常用いられる押出成形法によって所望の形状に成形さ
れ、その後通常養生やオートクレーブ養生(温度160
〜170℃)、乾燥工程を経てセメント硬化体に形成さ
れる。
Then, the above-mentioned cement, aggregate, lightweight aggregate, fiber substance, polyether derivative, and a coloring agent such as a commonly used pigment are mixed in predetermined amounts and dry-mixed with a mixer or the like. In addition, by kneading with a mixer or a kneader, a cement composition having a water retention capacity of 95% or more can be prepared. This cement composition contains 1 to 3% by weight of a polyether derivative based on the total weight of cement and aggregate. If the blending amount of the polyether derivative is less than 1% by weight, the water retention ability is lowered and the plasticity is insufficient to make molding impossible, and if the blending amount of the polyether derivative exceeds 3% by weight, it is difficult to burn. The heat generation temperature becomes high, and it becomes impossible to pass the substrate test described later. Here, the water retention capacity can be adjusted by the kind and molecular weight of the polyether derivative. This cement composition is molded into a desired shape by a commonly used extrusion molding method, and then subjected to normal curing or autoclave curing (temperature 160).
˜170 ° C.), and dried into a hardened cement body.

【0011】このように本発明のセメント硬化体では、
セメント組成物に可塑性を付与する成形助剤として、メ
チルセルロースなどのセルロース誘導体よりも発熱量が
少ないポリエーテル系誘導体を用いたので、燃焼時にお
ける発熱温度が低くなるものである。またこのように本
発明のセメント硬化体は発熱温度が低くなるために、発
熱量の多い有機繊維物質を多く配合しても発熱温度がそ
れ程高くなることがなく、補強性のある繊維物質を多く
配合することができる。さらにセメント組成物の保水力
を95%以上にしたので、成形する際に必要な可塑性を
十分に得ることができる。
Thus, in the hardened cement product of the present invention,
Since a polyether derivative having a smaller calorific value than a cellulose derivative such as methyl cellulose is used as a molding aid for imparting plasticity to the cement composition, the exothermic temperature during combustion becomes low. Further, since the hardened cement of the present invention has a low exothermic temperature, the exothermic temperature does not increase so much even if a large amount of an organic fibrous substance having a large calorific value is added, and many fibrous substances having a reinforcing property are used. It can be blended. Further, since the water retention capacity of the cement composition is set to 95% or more, it is possible to sufficiently obtain the plasticity necessary for molding.

【0012】[0012]

【実施例】以下本発明を実施例によって詳述する。 (実施例1〜3)セメントとして普通ポルトランドセメ
ントを、骨材として珪石粉等を、繊維物質としてパルプ
と石綿を、成形助剤としてポリエチレングリコールで構
成されるポリエーテル系特殊水溶性高分子(三洋化成工
業(株)社製NK−51)を、それぞれ表1に示す配合
量で混合し、さらに水を加えて神鋼パンテック(株)社
製PSミキサーを用いて混練してセメント組成物を調製
した。
EXAMPLES The present invention will be described in detail below with reference to examples. (Examples 1 to 3) Ordinary Portland cement as a cement, silica stone powder or the like as an aggregate, pulp and asbestos as a fibrous substance, and a polyethylene-based special water-soluble polymer composed of polyethylene glycol as a molding aid (SANYO). Kasei Kogyo Co., Ltd. NK-51) was mixed in the respective compounding amounts shown in Table 1, water was further added, and the mixture was kneaded using a Shinko Pantech Co., Ltd. PS mixer to prepare a cement composition. did.

【0013】(比較例1〜3)上記実施例1〜3と同じ
セメントと骨材と繊維物質と、成形助剤としてメチルセ
ルロース(信越化学社製 HPMC)を、それぞれ表1
に示す配合量で上記実施例1〜3と同じ要領で混練して
セメント組成物を調製した。上記実施例1〜3と比較例
1〜3のセメント組成物について保水性試験をおこなっ
た。試験装置は図1に示すように、直径25mmのピス
トン挿入部1とピストン挿入部1に連通して下側に凹設
される排水部2とが形成されたシリンダ3と、ピストン
挿入部1に上下動自在に装着されるピストン4とから構
成されている。ピストン挿入部1の下部にはメッシュ
0.15mmの網5と、ろ紙6と、口径5mmでそのピ
ッチが10mmの孔が形成されたパンチングメタル7と
を収納してある。そしてピストン4と網5の間にセメン
ト組成物8を50g投入し、ピストン4に2tの荷重を
10分間かけてセメント組成物8を加圧し、セメント組
成物8に含まれている水を排水部2に排出する。この後
セメント組成物8を取り出してその質量を測定する。
Comparative Examples 1 to 3 The same cement, aggregate and fiber material as in Examples 1 to 3 and methyl cellulose (HPMC manufactured by Shin-Etsu Chemical Co., Ltd.) as molding aids are shown in Table 1.
A cement composition was prepared by kneading with the compounding amount shown in the same manner as in Examples 1 to 3 above. A water retention test was conducted on the cement compositions of Examples 1 to 3 and Comparative Examples 1 to 3. As shown in FIG. 1, the test apparatus includes a cylinder 3 in which a piston insertion portion 1 having a diameter of 25 mm and a drainage portion 2 which communicates with the piston insertion portion 1 and is recessed downward are formed, and a piston insertion portion 1. It is composed of a piston 4 which is vertically movable. A mesh 5 having a mesh of 0.15 mm, a filter paper 6, and a punching metal 7 having holes having a diameter of 5 mm and a pitch of 10 mm are housed under the piston insertion portion 1. Then, 50 g of the cement composition 8 is put between the piston 4 and the net 5, the load of 2 t is applied to the piston 4 for 10 minutes to pressurize the cement composition 8, and the water contained in the cement composition 8 is drained. Discharge to 2. After this, the cement composition 8 is taken out and its mass is measured.

【0014】保水性能を示す保水力は次式(a)によっ
て求められる。 保水力(%)=(加圧後の質量)÷(初期質量50g)×100 …(a) この式(a)で求められた保水力の値を表1に示す。ま
た上記実施例1〜3と比較例1〜3のセメント組成物を
本田鉄工社製の押出機で押出成形法にて成形し、養生
(40℃、16時間程度)、乾燥硬化工程を経てセメン
ト硬化体を形成した。このうち押出成形法にてセメント
硬化体を形成することができたものについては合格とし
て○を付し、セメント硬化体を形成することができなか
ったものについては不合格として×を付した。結果を表
1に示す。
The water retention capacity showing the water retention performance is obtained by the following equation (a). Water retention capacity (%) = (mass after pressurization) / (initial mass 50 g) × 100 (a) Table 1 shows the values of the water retention capacity obtained by this formula (a). In addition, the cement compositions of Examples 1 to 3 and Comparative Examples 1 to 3 were molded by an extrusion molding method using an extruder manufactured by Honda Iron Works Co., Ltd., cured (40 ° C., about 16 hours), and dried and hardened to give cement. A cured body was formed. Of these, those that were able to form a hardened cement product by the extrusion molding method were marked with a pass, and those that could not be formed with a hardened cement product were marked with a failure. The results are shown in Table 1.

【0015】さらに上記成形でセメント硬化体を形成す
ることができたものについては、JIS A 1321
建築物の内装材料及び工法の難燃性試験における基材
試験の項目に準拠して不燃性試験をおこなった。そして
炉内の温度が50℃以下のものを合格として○を付し、
50℃を越えるものを不合格として×を付した。結果を
表1に示す。
[0015] Further, as to the cement hardened product which can be formed by the above-mentioned molding, JIS A 1321
A nonflammability test was carried out in accordance with the items of the base material test in the flame retardancy test of building interior materials and construction methods. And, those with a temperature in the furnace of 50 ° C or less are marked as ○,
Those exceeding 50 ° C. were rejected and marked with X. The results are shown in Table 1.

【0016】[0016]

【表1】 [Table 1]

【0017】表1から判るように、実施例1〜3及び比
較例1〜3のセメント組成物は成形助剤を配合したの
で、保水力が高くて可塑性を有したものとなり、押出成
形法にてセメント硬化体に成形することができる。また
実施例1と比較例1を比較すると、両方とも燃えにくい
無機繊維物質である石綿のみを配合してあるので、基材
試験で合格する。しかし実施例2と比較例2或いは実施
例3と比較例3を比較すると、比較例2、3の発熱量が
大きくなって炉内の温度が50℃を越えてしまい、基材
試験で不合格となるのに対し、実施例2、3のものでは
基材試験で炉内の温度が50℃以下であり、基材試験に
合格する。つまり本発明では発熱量に少ないポリエーテ
ルを使用しているので、安価で無公害で燃焼しやすい有
機繊維物質であるパルプを使用しても、基材試験に合格
することができる。
As can be seen from Table 1, since the cement compositions of Examples 1 to 3 and Comparative Examples 1 to 3 were blended with a molding aid, they had high water retention ability and plasticity, and thus the extrusion molding method was excellent. It can be molded into hardened cement. In addition, comparing Example 1 and Comparative Example 1, both of them contain only asbestos, which is an inorganic fiber material that is difficult to burn, and thus pass the base material test. However, when Example 2 and Comparative Example 2 or Example 3 and Comparative Example 3 are compared, the calorific value of Comparative Examples 2 and 3 becomes large and the temperature in the furnace exceeds 50 ° C., which fails the base material test. On the other hand, in Examples 2 and 3, the temperature in the furnace is 50 ° C. or lower in the base material test, and the base material test is passed. That is, in the present invention, since the polyether having a small calorific value is used, the base material test can be passed even if pulp, which is an inexpensive, non-polluting and easily combustible organic fiber substance, is used.

【0018】(実施例4〜6)セメントとして普通ポル
トランドセメントを、骨材として珪石粉等を、軽量骨材
として塩化ビニリデンとアクリロニトリルの共重合体
(松本油脂社製マイクロフアーF−30E)を、繊維物
質としてパルプと石綿を、成形助剤として保水性能が高
いポリエチレングリコールで構成されるポリエーテル系
特殊水溶性高分子(三洋化成工業(株)社製NK−5
1)を、それぞれ表1に示す配合量で混合し、さらに水
を加えて混練してセメント組成物を調製した。
(Examples 4 to 6) Ordinary Portland cement was used as the cement, silica stone powder or the like was used as the aggregate, and a copolymer of vinylidene chloride and acrylonitrile (Microfar F-30E manufactured by Matsumoto Yushi Co., Ltd.) was used as the lightweight aggregate. Polyether special water-soluble polymer (NK-5 manufactured by Sanyo Kasei Co., Ltd.) composed of pulp and asbestos as fiber substances and polyethylene glycol having high water retention performance as a molding aid.
1) was mixed in the compounding amounts shown in Table 1, and water was further added and kneaded to prepare a cement composition.

【0019】(比較例4〜6)上記実施例4〜6と同じ
セメントと骨材と繊維物質と、成形助剤として保水性能
が低いポリエチレングリコールで構成されるポリエーテ
ル系特殊水溶性高分子(三洋化成工業(株)社製NK−
51)を、それぞれ表1に示す配合量で混合し、さらに
水を加えて混練してセメント組成物を調製した。
(Comparative Examples 4 to 6) A polyether-based special water-soluble polymer composed of the same cement, aggregate and fibrous substance as in Examples 4 to 6 and polyethylene glycol having a low water retention performance as a molding aid ( NK- manufactured by Sanyo Kasei Co., Ltd.
51) were mixed in the compounding amounts shown in Table 1, and water was further added and kneaded to prepare a cement composition.

【0020】尚、実施例4〜6に用いる成形助剤と比較
例4〜6に用いる成形助剤とは、同じ品番のものを使用
しているが、各内容は異なったものであり、実施例4〜
6に用いる成形助剤は保水性能が高いポリエチレングリ
コールで構成されるポリエーテル系特殊水溶性高分子で
あり、比較例4〜6に用いる成形助剤は保水性能が低い
ポリエチレングリコールで構成されるポリエーテル系特
殊水溶性高分子である。この保水性能の差はポリエーテ
ル系特殊水溶性高分子の分子量の大小に起因していると
考えられる。
The molding aids used in Examples 4 to 6 and the molding aids used in Comparative Examples 4 to 6 have the same product number, but their contents are different. Example 4-
The molding aid used in No. 6 is a polyether-based special water-soluble polymer composed of polyethylene glycol having high water retention performance, and the molding aid used in Comparative Examples 4 to 6 is made of polyethylene glycol having low water retention performance. It is an ether-based special water-soluble polymer. It is considered that this difference in water retention performance is due to the molecular weight of the polyether-based special water-soluble polymer.

【0021】上記実施例4〜6と比較例4〜6のセメン
ト組成物について保水性試験を上記実施例1〜3と同じ
要領でおこない、式(a)で求められた保水力の値を表
2に示す。また上記実施例4〜6と比較例4〜6のセメ
ント組成物を上記実施例1〜3と同じ要領で押出成形法
にて成形した。このうち押出成形法にてセメント硬化体
を形成することができたものについては合格として○を
付し、セメント硬化体を形成することができなかったも
のについては不合格として×を付した。結果を表2に示
す。
A water retention test was conducted on the cement compositions of Examples 4 to 6 and Comparative Examples 4 to 6 in the same manner as in Examples 1 to 3 above, and the value of water retention obtained by the formula (a) is shown. 2 shows. The cement compositions of Examples 4 to 6 and Comparative Examples 4 to 6 were molded by the extrusion molding method in the same manner as in Examples 1 to 3 above. Of these, those that were able to form a hardened cement product by the extrusion molding method were marked with a pass, and those that could not be formed with a hardened cement product were marked with a failure. Table 2 shows the results.

【0022】さらに上記成形でセメント硬化体を形成す
ることができたものについては、上記と同様の不燃性試
験をおこなった。そして炉内の温度が50℃以下のもの
を合格として○を付し、50℃を越えるものを不合格と
して×を付した。結果を表2に示す。
Further, with respect to the one in which the cement hardened product could be formed by the above-mentioned molding, the same nonflammability test as described above was conducted. Then, those having a temperature in the furnace of 50 ° C. or lower were marked as ◯, and those exceeding 50 ° C. were rejected as ×. Table 2 shows the results.

【0023】[0023]

【表2】 [Table 2]

【0024】表2から判るように、比較例4〜6のセメ
ント組成物では保水力が低くて十分な可塑性を得ること
ができず、押出成形法にてセメント硬化体に成形するこ
とができなかった。
As can be seen from Table 2, the cement compositions of Comparative Examples 4 to 6 have a low water retention ability and cannot obtain sufficient plasticity, and cannot be molded into a cement hardened product by an extrusion molding method. It was

【0025】[0025]

【発明の効果】上記のように本発明は、セメントを主成
分とし、成形助剤としてポリエーテル系誘導体が配合さ
れた保水力が95%以上のセメント組成物から成るの
で、成形助剤としてメチルセルロースなどのセルロース
誘導体よりも発熱量が少ないポリエーテル系誘導体を用
いることによって、燃焼時における発熱温度が低くなる
ものである。そしてこのように発熱温度が低くなるため
に、発熱量の多い有機繊維物質を多く配合しても発熱温
度がそれ程高くなることがなく、補強性のあるパルプな
どの有機繊維物質を多く配合することができ、強度の向
上を図ることができるものである。
As described above, the present invention comprises a cement composition containing cement as a main component and a polyether derivative as a molding aid and having a water retention capacity of 95% or more. Therefore, methyl cellulose is used as a molding aid. By using a polyether derivative having a smaller calorific value than that of the cellulose derivative, the exothermic temperature during combustion is lowered. Since the exothermic temperature becomes low in this way, the exothermic temperature does not become so high even if a large amount of the organic fiber substance having a large calorific value is blended, and a large amount of the organic fiber substance such as the reinforcing pulp is blended. Therefore, the strength can be improved.

【0026】また本発明は、1〜3重量%のポリエーテ
ル系誘導体が配合されたセメント組成物から成るので、
ポリエーテル系誘導体が少な過ぎて保水力が不足して十
分な可塑性を得られなくなって成形することができなく
なるようなこともなく、またポリエーテル系誘導体が多
過ぎて燃焼時に発熱温度が高くなるようなこともないよ
うにすることができるものである。
The present invention also comprises a cement composition containing 1 to 3% by weight of a polyether derivative,
There is not too much polyether derivative and water retention is not enough to obtain sufficient plasticity so that molding cannot be performed. Also, there is too much polyether derivative and the exothermic temperature rises during combustion. It is something that can be prevented.

【0027】さらに本発明は、セメントを主成分とし、
成形助剤としてポリエーテル系誘導体を配合して調製し
た保水力が95%以上のセメント組成物を押出成形法で
成形し、養生硬化したので、成形助剤としてポリエーテ
ル系誘導体を配合することによって、従来から成形助剤
として用いられているメチルセルロースを配合したセメ
ント組成物と同等の可塑性を有することができ、押出成
形法で連続的に中空形状の異型品を製造することができ
るものである。
Further, the present invention is mainly composed of cement,
A cement composition having a water retention capacity of 95% or more prepared by blending a polyether derivative as a molding aid was molded by an extrusion molding method and cured by curing. Therefore, by blending a polyether derivative as a molding aid. The plastic composition has the same plasticity as that of a cement composition containing methyl cellulose, which has been conventionally used as a molding aid, and a hollow-shaped atypical product can be continuously produced by an extrusion molding method.

【図面の簡単な説明】[Brief description of drawings]

【図1】保水性試験に用いる装置の断面図である。FIG. 1 is a cross-sectional view of an apparatus used for a water retention test.

【符号の説明】[Explanation of symbols]

8 セメント組成物 8 Cement composition

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 C04B 24:32 Z 16:02 Z 14:40 14:04) Z 103:46 111:20 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI Technical display location C04B 24:32 Z 16:02 Z 14:40 14:04) Z 103: 46 111: 20

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 セメントを主成分とし、成形助剤として
ポリエーテル系誘導体が配合された保水力が95%以上
のセメント組成物から成ることを特徴とするセメント硬
化体。
1. A hardened cement product, which comprises a cement composition containing cement as a main component and a polyether derivative as a molding aid and having a water retention capacity of 95% or more.
【請求項2】 1〜3重量%のポリエーテル系誘導体が
配合されたセメント組成物から成ることを特徴とする請
求項1に記載のセメント硬化体。
2. The hardened cement product according to claim 1, which is composed of a cement composition containing 1 to 3% by weight of a polyether derivative.
【請求項3】 セメントを主成分とし、成形助剤として
ポリエーテル系誘導体を配合して調製した保水力が95
%以上のセメント組成物を押出成形法で成形し、養生硬
化することを特徴とするセメント硬化体の製造方法。
3. A water-retaining power prepared by mixing cement as a main component with a polyether derivative as a molding aid is 95.
% Of the cement composition is molded by an extrusion molding method, and is cured by curing.
JP24974894A 1994-10-14 1994-10-14 Hardened article of cement and its production Withdrawn JPH08119703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24974894A JPH08119703A (en) 1994-10-14 1994-10-14 Hardened article of cement and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24974894A JPH08119703A (en) 1994-10-14 1994-10-14 Hardened article of cement and its production

Publications (1)

Publication Number Publication Date
JPH08119703A true JPH08119703A (en) 1996-05-14

Family

ID=17197637

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24974894A Withdrawn JPH08119703A (en) 1994-10-14 1994-10-14 Hardened article of cement and its production

Country Status (1)

Country Link
JP (1) JPH08119703A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1266877A3 (en) * 2001-06-13 2003-08-13 Shin-Etsu Chemical Co., Ltd. Hydraulic composition for extrusion molding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1266877A3 (en) * 2001-06-13 2003-08-13 Shin-Etsu Chemical Co., Ltd. Hydraulic composition for extrusion molding

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