JPH0489341A - Cement composition to be extrusion-molded - Google Patents
Cement composition to be extrusion-moldedInfo
- Publication number
- JPH0489341A JPH0489341A JP2204417A JP20441790A JPH0489341A JP H0489341 A JPH0489341 A JP H0489341A JP 2204417 A JP2204417 A JP 2204417A JP 20441790 A JP20441790 A JP 20441790A JP H0489341 A JPH0489341 A JP H0489341A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- parts
- weight
- lightweight aggregate
- lightweight
- 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 55
- 239000000203 mixture Substances 0.000 title claims abstract description 34
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 31
- 229910052882 wollastonite Inorganic materials 0.000 claims abstract description 17
- 239000010456 wollastonite Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 5
- 238000001125 extrusion Methods 0.000 claims description 29
- 239000002245 particle Substances 0.000 claims description 12
- 239000002562 thickening agent Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 229940095672 calcium sulfate Drugs 0.000 description 11
- 230000005484 gravity Effects 0.000 description 10
- 239000000835 fiber Substances 0.000 description 9
- 239000010440 gypsum Substances 0.000 description 9
- 229910052602 gypsum Inorganic materials 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 238000001723 curing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000010425 asbestos Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 238000013007 heat curing Methods 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910052895 riebeckite Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 229910001653 ettringite Inorganic materials 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009408 flooring Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 235000010981 methylcellulose Nutrition 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 241000975357 Salangichthys microdon Species 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229940095564 anhydrous calcium sulfate Drugs 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229940057306 hemihydrate calcium sulfate Drugs 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011802 pulverized particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- QPILZZVXGUNELN-UHFFFAOYSA-N sodium;4-amino-5-hydroxynaphthalene-2,7-disulfonic acid Chemical compound [Na+].OS(=O)(=O)C1=CC(O)=C2C(N)=CC(S(O)(=O)=O)=CC2=C1 QPILZZVXGUNELN-UHFFFAOYSA-N 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 150000004684 trihydrates Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、押出成形用セメント組成物に関し、詳しくは
、特に軽量で高強度であり、更に、養生時間が短かく、
床材、外装壁材、屋根材等に好適に用いることができる
押出セメント成形硬化体を製造するための押出成形用セ
メント組成物に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cement composition for extrusion molding, and more specifically, it is particularly lightweight and has high strength, and furthermore, has a short curing time.
The present invention relates to a cement composition for extrusion molding for producing an extrusion cement molded hardened body that can be suitably used for flooring materials, exterior wall materials, roofing materials, etc.
（従来の技術）
近年、床材、外装壁材、屋根材等に押出セメント成形硬
化体が多く用いられるに至っている。(Prior Art) In recent years, extruded cement molded hardened bodies have come into widespread use for flooring materials, exterior wall materials, roofing materials, and the like.
このような押出セメント成形硬化体は、従来、加水混合
したセメント材料を押出成形機中、真空脱気しながら、
バレルとスクリュー間で加圧してダイスに送り、高圧下
に成形し、これを養生することによって製造されており
、従って、得られるセメント成形硬化体は、緻密で高密
度を有する。Conventionally, such an extruded cement molded hardened body is produced by mixing cement material with water in an extrusion molding machine while degassing under vacuum.
It is manufactured by applying pressure between a barrel and a screw, sending it to a die, molding it under high pressure, and curing it. Therefore, the resulting cement molded hardened product is dense and has high density.
そこで、かかる押出セメント成形硬化体を軽量化するた
めに、押出成形用セメント組成物に無機軽量バルーンや
パーライトを軽量骨材として配合することが知られてい
る。しかし、これら無機軽量骨材は、原料の混合混練時
や、押出機内で加えられる剪断応力によって容易に破壊
するので、従来、目的とする軽量の押出セメント成形硬
化体を得ることが困難であった。Therefore, in order to reduce the weight of such an extruded cement molded hardened body, it is known to mix inorganic lightweight balloons or perlite as a lightweight aggregate into a cement composition for extrusion molding. However, these inorganic lightweight aggregates are easily destroyed by the shear stress applied during mixing and kneading of the raw materials or in the extruder, so it has been difficult to obtain the desired lightweight extruded cement molded hardened bodies. .
他方、従来、押出成形用セメント組成物には、押出成形
時の成形性、保形性及び硬化後の機械的強度を改善する
ために、多量のアスベストが配合されている。しかし、
アスベストは発癌性を有し、健康及び環境保全の観点か
ら、その使用が法的に規制されるに至っている。On the other hand, conventionally, cement compositions for extrusion molding contain a large amount of asbestos in order to improve moldability during extrusion molding, shape retention, and mechanical strength after hardening. but,
Asbestos is carcinogenic, and its use has come to be legally regulated from the viewpoint of health and environmental protection.
（発明が解決しようとする課題）
本発明は、従来の押出成形用セメント組成物における上
記した問題を解決するためになされたものであって、ア
スベストを含まず、軽量高強度で異形断面を有するセメ
ント押出成形硬化体を得るための押出成形用セメント組
成物を提供することを目的とする。(Problems to be Solved by the Invention) The present invention has been made to solve the above-mentioned problems in conventional extrusion molding cement compositions, which do not contain asbestos, are lightweight, have high strength, and have a modified cross section. An object of the present invention is to provide a cement composition for extrusion molding to obtain a cement extrusion molded hardened product.
（課題を解決するための手段）
本発明による押出成形用セメント組成物は、セメントと
補強繊維と繊維状保水剤と増粘剤とを主成分として含有
する押出成形用セメント組成物において、セメント１０
０重量部に対して、硫酸カルシウム０．５〜５０重量部
とウオラストナイト４５〜３００重量部と粒径５鶴以下
の弾性を有する軽量骨材０．１〜２０重量部と無機軽量
骨材０〜１００重量部とを含有することを特徴とする。(Means for Solving the Problems) A cement composition for extrusion molding according to the present invention is a cement composition for extrusion molding containing cement, reinforcing fibers, a fibrous water retention agent, and a thickener as main components.
0 parts by weight of calcium sulfate, 0.5 to 50 parts by weight of calcium sulfate, 45 to 300 parts by weight of wollastonite, 0.1 to 20 parts by weight of lightweight aggregate having elasticity with a particle size of 5 or less, and inorganic lightweight aggregate. 0 to 100 parts by weight.
本発明において、セメントとしては、ポルトランドセメ
ント、高炉セメント、アルミナセメント等が用いられる
。In the present invention, as the cement, Portland cement, blast furnace cement, alumina cement, etc. are used.
補強繊維としてはミ従来、押出成形用セメント組成物に
用いられている任意のものが用いられ、このような補強
繊維として、例えば、ポリプロピレン繊維、ポリエステ
ル繊維、ポリアミド繊維、ビニロンｍ 維を含むポリビ
ニルアルコール繊維等の有機合成繊維が好適に用いられ
る。また、炭素繊維も用いられる。このような補強繊維
は、セメント１００重量部に対して、通常、１〜２０重
量部、好ましくは３〜ｌＯ重量部の範囲で用いられる。Any reinforcing fibers that have been conventionally used in cement compositions for extrusion molding may be used, such as polypropylene fibers, polyester fibers, polyamide fibers, polyvinyl alcohol containing vinylon fibers, etc. Organic synthetic fibers such as fibers are preferably used. Carbon fibers are also used. Such reinforcing fibers are generally used in an amount of 1 to 20 parts by weight, preferably 3 to 10 parts by weight, per 100 parts by weight of cement.
同様に、繊維状保水剤も、従来より知られているものが
適宜に用いられる。このような繊維状保水剤としては、
例えば、パルプ、木粉、麻繊維、木綿や、これらの繊維
屑を挙げることができる。Similarly, conventionally known fibrous water retaining agents can be used as appropriate. As such fibrous water retention agents,
Examples include pulp, wood flour, hemp fiber, cotton, and waste fibers thereof.
繊維状保水剤は、セメント１００重量部に対して、通常
、０．５〜２０重量部、好ましくは１〜１０重量部の範
囲で用いられる。The fibrous water retention agent is generally used in an amount of 0.5 to 20 parts by weight, preferably 1 to 10 parts by weight, based on 100 parts by weight of cement.
また、増粘剤も、従来、知られているメチルセルロース
、カルボキシルメチルセルロース、ポリアクリル酸エス
テル、ポリビニルアルコール、ポリエチレンオキサイド
等が適宜に用いられる。このような増粘剤は、通常、セ
メント１ｏｏ重量部に対して、０．５〜２０重量部、好
ましくは１〜５重量部の範囲で配合される。Further, as the thickener, conventionally known methylcellulose, carboxylmethylcellulose, polyacrylic acid ester, polyvinyl alcohol, polyethylene oxide, etc. can be used as appropriate. Such thickeners are usually blended in an amount of 0.5 to 20 parts by weight, preferably 1 to 5 parts by weight, per 10 parts by weight of cement.
本発明による押出成形用セメント組成物は、硫酸カルシ
ウムとウオラストナイトとを含有する。The extrusion cement composition according to the invention contains calcium sulfate and wollastonite.
硫酸カルシウムは、得られる成形体の加熱養生時間を短
縮するのに効果がある。この硫酸カルシウムとしては、
天然石こう又は硫黄分を含む原料から得られる化学石こ
うや脱硫石こうが用いられる。例えば、無水硫酸カルシ
ウム（無水石こう）、半水硫酸カルシウム（半水石こう
、焼き石こう）、三水石こうや、また、これらを含むセ
メント材料、例えば、電気化学工業側型「ジェットセメ
ント」等が好適に用いられる。Calcium sulfate is effective in shortening the heat curing time of the resulting molded product. This calcium sulfate is
Natural gypsum or chemical gypsum or desulfurized gypsum obtained from raw materials containing sulfur are used. For example, anhydrous calcium sulfate (anhydrous gypsum), hemihydrate calcium sulfate (hemihydrate gypsum, calcined gypsum), trihydrate gypsum, and cement materials containing these, such as Denki Kagaku Kogyo's type "jet cement", are suitable. used for.
本発明によれば、硫酸カルシウムは、セメント１００重
量部に対して、０．５〜５０重量部の範囲で用いられる
。０．５重量部よりも少ないときは、成形体を蒸気養生
したときに早期強度の発現が遅く、十分な強度を得るに
は長期にわたる養生が必要となって、生産性に劣る。他
方、５０重量部を越えるときは、蒸気養生による強度発
現を速やかに得ることができるが、得られる成形硬化体
が耐久性や耐水性に劣り、長期にわたる使用において反
りや変形等を生じるので、寸法精度がよくなく、外装建
材に用いるに適さない。According to the present invention, calcium sulfate is used in an amount of 0.5 to 50 parts by weight based on 100 parts by weight of cement. When the amount is less than 0.5 part by weight, the early stage strength is slow to develop when the molded body is steam-cured, and long-term curing is required to obtain sufficient strength, resulting in poor productivity. On the other hand, when the amount exceeds 50 parts by weight, strength can be quickly developed through steam curing, but the resulting molded and cured product has poor durability and water resistance, and warps and deformations occur during long-term use. Dimensional accuracy is poor, making it unsuitable for use as exterior building materials.
他方、ウオラストナイトは、化学式ＣａＳｉＯ３で表わ
されるカルシウムメタシリケートの針状乃至繊維状結晶
であって、珪灰石とも呼ばれている。On the other hand, wollastonite is an acicular or fibrous crystal of calcium metasilicate represented by the chemical formula CaSiO3, and is also called wollastonite.
このウオラストナイトには、その結晶構造によってα型
とβ型とがあるが、本発明においては、特に、針状長柱
状の結晶構造を有するβ型であって、アスペクト比が５
以上のものが好ましく用いられる。This wollastonite has α-type and β-type depending on its crystal structure, but in the present invention, in particular, the β-type has an acicular long columnar crystal structure and has an aspect ratio of 5.
Those mentioned above are preferably used.
ウオラストナイトをセメント組成物に配合することによ
って、その繊維間にセメントゲルと石こうから生成する
エトリンガイトの針状結晶が成長し、エトリンガイトと
の相乗作用によって、得られる成形硬化体を高強度とす
る。更に、ウオラストナイトは、後述する弾性軽量骨材
のスプリングバックによる製品表面の凹凸模様の現出を
助ける作用を有する。By blending wollastonite into a cement composition, acicular crystals of ettringite generated from cement gel and gypsum grow between the fibers, and the synergistic effect with ettringite gives the resulting molded hardened product high strength. . Furthermore, wollastonite has the effect of helping to create an uneven pattern on the surface of the product due to springback of the elastic lightweight aggregate, which will be described later.
本発明によれば、ウオラストナイトは、セメント１００
重量部に対して、４５〜３００重量部の範囲で用いられ
る。４５重量部よりも少ないときは、上記した成形硬化
体の高強度化の効果に乏しく、更に、製品表面に不均一
な模様を現出させるおそれがある。しかし、３００重量
部を越えるときは、組成物の押出成形時、背圧が上昇し
、吐出変動を起こさせるので、安定した成形を行なうこ
とができない。According to the invention, wollastonite is made of cement 100
It is used in a range of 45 to 300 parts by weight. When the amount is less than 45 parts by weight, the above-mentioned effect of increasing the strength of the molded and cured product is insufficient, and furthermore, there is a risk that an uneven pattern may appear on the surface of the product. However, if the amount exceeds 300 parts by weight, back pressure increases during extrusion molding of the composition, causing fluctuations in discharge, making it impossible to perform stable molding.
前述したように、本発明によれば、セメント組成物中に
ウオラストナイトと硫酸カルシウムを併用することによ
って、それらの相乗作用によって、得られる成形硬化体
にすぐれた強度を与えることができる。エトリンガイト
との相乗作用によって、得られる成形硬化体を高強度と
する。更に、ウオラストナイトは、後述する弾性軽量骨
材のスプリングバックによる製品表面の凹凸模様の現出
を助ける作用を有する。特に、本発明によれば、硫酸カ
ルシウム３〜３０重量部に対して、ウオラストナイト４
５〜２００重量部を用いることが好ましい。As described above, according to the present invention, by using wollastonite and calcium sulfate in combination in a cement composition, excellent strength can be imparted to the resulting molded and cured product due to their synergistic action. Due to the synergistic effect with ettringite, the obtained molded and cured product has high strength. Furthermore, wollastonite has the effect of helping to create an uneven pattern on the surface of the product due to springback of the elastic lightweight aggregate, which will be described later. In particular, according to the present invention, 4 parts by weight of wollastonite are added to 3 to 30 parts by weight of calcium sulfate.
It is preferable to use 5 to 200 parts by weight.
更に、本発明による押出成形用セメント組成物は、セメ
ント１００重量部に対して、軽量骨材として、弾性を有
する軽量骨材（以下、弾性軽量骨材という。）を０．１
〜２０重量部、好ましくは０゜１〜１０重量部と、無機
軽量骨材０〜１００重量部、好ましくは１〜１００重量
部とを含有する。Furthermore, the cement composition for extrusion molding according to the present invention contains 0.1 of an elastic lightweight aggregate (hereinafter referred to as elastic lightweight aggregate) as a lightweight aggregate with respect to 100 parts by weight of cement.
-20 parts by weight, preferably 0.1 to 10 parts by weight, and 0 to 100 parts by weight, preferably 1 to 100 parts by weight of inorganic lightweight aggregate.
本発明において、上記弾性軽量骨材とは、粒径が５ｆｉ
以下、好ましくは嵩比重が０．８以下の粒子であって、
その形状が変形するまで加圧した後、開放するとき、弾
性回復（スプリングバック）する性質を有し、好ましく
は密閉された容器内で約１０ｋｇ／１ｆｆｌの水圧を加
えた後、大気中に開放したとき、粒子が分断破壊される
ことなく、全容積の約２０％以上が弾性回復するものが
望ましい。In the present invention, the elastic lightweight aggregate has a particle size of 5fi.
Hereinafter, particles preferably have a bulk specific gravity of 0.8 or less,
It has the property of elastic recovery (springback) when it is released after being pressurized until its shape is deformed, preferably after applying water pressure of about 10 kg/1ffl in a sealed container and then being released to the atmosphere. When this happens, it is desirable that about 20% or more of the total volume recovers elastically without the particles being fragmented or destroyed.
このような弾性軽量骨材は、独立気泡体、多泡体、発泡
粒、バルーン、層状物等であってよく、例えば、合成樹
脂発泡体やこの発泡体を粉砕した発泡粉砕粒が好適に用
いられる。例えば、ポリスチレン、ポリエチレン、ポリ
プロピレン、ポリ塩化ビニル、アクリル樹脂、ウレタン
樹脂、フェノール樹脂等からなる合成樹脂発泡体やその
粉砕粒が好適に用いられる。これら以外にも、例えば、
木材の粉末やチップ、繊維状物等も用いられる。Such elastic lightweight aggregates may be closed cells, multifoams, foamed granules, balloons, layered materials, etc. For example, synthetic resin foams and foamed pulverized granules obtained by crushing these foams are preferably used. It will be done. For example, synthetic resin foams made of polystyrene, polyethylene, polypropylene, polyvinyl chloride, acrylic resins, urethane resins, phenol resins, etc. and pulverized particles thereof are preferably used. In addition to these, for example,
Wood powder, chips, fibrous materials, etc. can also be used.
弾性軽量骨材の配合量が多すぎるときは、成形後のスプ
リングバックが大きくなり、成形体全体にひびや割れが
発生し、極端な場合には、成形体が崩壊する。従って、
弾性軽量骨材は、セメント１００重量部に対して、２０
重量部以下の範囲で用いられる。If the amount of elastic lightweight aggregate is too large, the springback after molding will increase, causing cracks and cracks in the entire molded product, and in extreme cases, the molded product will collapse. Therefore,
The elastic lightweight aggregate is 20 parts by weight per 100 parts by weight of cement.
It is used in a range of parts by weight or less.
無機軽量骨材も、粒径が５鶴以下、嵩比重が０゜８以下
であって、火山灰やケイ酸質を含む天然石、砂、粉粒体
を軟化点付近の温度で発泡して得られるもの、例えば、
シラスバルーン、パーライトや、火力発電所、溶鉱炉、
燃焼炉、ボイラー等で生じるフライアッシュバルーン等
の軽量の粉体が好ましく用いられる。Inorganic lightweight aggregate also has a particle size of 5 or less and a bulk specific gravity of 0.8 or less, and is obtained by foaming natural stone, sand, or powder containing volcanic ash or silicic acid at a temperature near the softening point. things, for example,
Shirasu balloons, perlite, thermal power plants, blast furnaces,
Light-weight powder such as fly ash balloons produced in combustion furnaces, boilers, etc. is preferably used.
本発明によれば、上記弾性軽量骨材と共に、好ましくは
軽量無機骨材が併用され、これによって、押出成形機内
での剪断応力による組成物中の無機軽量骨材の破損が防
止されるので、軽量のセメント成形硬化体を得ることが
できると共に、弾性軽量骨材は、押出機内で加圧された
後、金型から押し出されたとき、スプリングバックして
、成形体の表面に自然な模様を形成する。According to the present invention, a lightweight inorganic aggregate is preferably used in combination with the elastic lightweight aggregate, thereby preventing damage to the inorganic lightweight aggregate in the composition due to shear stress within the extruder. In addition to being able to obtain a lightweight cement molded hardened body, the elastic lightweight aggregate springs back when it is pressurized in the extruder and extruded from the mold, creating a natural pattern on the surface of the molded body. Form.
上記弾性軽量骨材と軽量無機骨材との配合割合は、目的
とする製品の比重と表面模様の濃淡の程度によって適宜
に選ばれるが、特に、本発明においては、セメント１０
０重量部に対して、粒径が５鶴以下、嵩比重が０．５以
下の弾性軽量骨材０．１〜２０重量部、好ましくは０．
３〜１０重量部と、粒径５ｎ以下、比重０．８以下の軽
量バルーン１〜１００重量部とを併用するのが好ましい
。The blending ratio of the above-mentioned elastic lightweight aggregate and lightweight inorganic aggregate is appropriately selected depending on the specific gravity of the target product and the degree of shading of the surface pattern.
0.1 to 20 parts by weight, preferably 0.0 parts by weight, of an elastic lightweight aggregate with a particle size of 5 or less and a bulk specific gravity of 0.5 or less.
It is preferable to use 3 to 10 parts by weight in combination with 1 to 100 parts by weight of lightweight balloons having a particle size of 5 nm or less and a specific gravity of 0.8 or less.
本発明による押出成形用セメント組成物は、必要に応じ
て、充填材を含有していてもよい。充填材としては、例
えば、粒径１ｆｌ以下の無機骨材であって、ケイ砂、シ
リカ、火山灰、白土、シラス、ＡＬＣ等の粉砕物、これ
ら粉体の集塵粉、フライアッシュ等が用いられる。これ
らは、通常、セメント１００重量部に対して、２００重
量部以下、好ましくは１０〜１００重量部の範囲で用い
られる。The cement composition for extrusion molding according to the present invention may contain a filler, if necessary. As the filler, for example, an inorganic aggregate with a particle size of 1 fl or less, such as silica sand, silica, volcanic ash, white clay, whitebait, crushed materials such as ALC, collected powder of these powders, fly ash, etc. is used. . These are usually used in an amount of 200 parts by weight or less, preferably 10 to 100 parts by weight, based on 100 parts by weight of cement.
本発明による押出成形用セメント組成物は、上記した成
分の混合物にセメント１００重量部に対して水を２０〜
１００重量部加えて、混練することによって得ることが
できる。The cement composition for extrusion molding according to the present invention is prepared by adding 20 to 20 parts of water to 100 parts by weight of cement to a mixture of the above-mentioned components.
It can be obtained by adding 100 parts by weight and kneading.
このような組成物を通常の押出成形機で所要形状に押出
成形し、温熱養生することによってセメント硬化体を得
ることができ、その後、必要に応じて、乾燥、塗装等を
行なう。本発明の組成物によれば、硫酸カルシウムを含
有しているので、養生時間は、４０〜９０℃の温度下、
３〜２４時間、好ましくは６〜１２時間行なえばよく、
従来の押出成形用セメント組成物に比べて、養生時間が
短縮される。A hardened cement product can be obtained by extruding such a composition into a desired shape using a conventional extrusion molding machine and heat curing, followed by drying, painting, etc., as required. According to the composition of the present invention, since it contains calcium sulfate, the curing time is at a temperature of 40 to 90°C.
It may be carried out for 3 to 24 hours, preferably 6 to 12 hours,
Curing time is reduced compared to conventional extrusion cement compositions.
（発明の効果）
以上のように、本発明の押出成形用セメントｕ放物は、
軽量骨材として、弾性軽量骨材を用いるので、通常は併
用する無機軽量骨材の押出機内での剪断応力による破損
が防止され、その結果、得られる成形硬化体は、軽量で
高強度を有する。また、得られる成形硬化体の表面には
、前記弾性軽量骨材のスプリングバックによって、自然
な凹凸模様を現出し、例えば、外壁材として好適である
。(Effect of the invention) As described above, the extrusion molding cement u paraboloid of the present invention has the following effects:
Since elastic lightweight aggregate is used as the lightweight aggregate, damage caused by shear stress in the extruder of the inorganic lightweight aggregate that is normally used in combination is prevented, and as a result, the resulting molded and cured product is lightweight and has high strength. . In addition, the surface of the obtained molded and cured product exhibits a natural uneven pattern due to the springback of the elastic lightweight aggregate, and is suitable for use as an exterior wall material, for example.
また、本発明による押出成形用セメント組成物は、硫酸
カルシウムを含有するので、加熱養生時間が短く、生産
性にすぐれる。更に、本発明においては、硫酸カルシウ
ムと共にウオラストナイトを併用するので、その相乗効
果によって、得られる成形硬化体は非常に高強度である
。In addition, since the cement composition for extrusion molding according to the present invention contains calcium sulfate, the heat curing time is short and productivity is excellent. Furthermore, in the present invention, since wollastonite is used together with calcium sulfate, the resulting molded and cured product has extremely high strength due to their synergistic effect.
また、アスベストを必須成分としないので、健康及び環
境保全の観点からも好ましい。Furthermore, since asbestos is not an essential component, it is preferable from the viewpoint of health and environmental conservation.
（実施例） 以下に実施例によって本発明を説明する。(Example) The present invention will be explained below by way of examples.
実施例１〜８及び比較例１及び２ （Ｕ放物及び成形体の製造） 原料として、水と共に次のものを適宜選択して用いた。Examples 1 to 8 and Comparative Examples 1 and 2 (Manufacture of U paraboloid and molded body) As raw materials, the following materials were appropriately selected and used along with water.
セメント
日本セメント製普通セメント
石こう
吉野石こう製二水石こう
電気化学工業製ジェットセメント（石こう含有量的５０
％）
ウオラストナイト
上屋カオリン製ケモリットＡ−６０（粒径２５０μｍ以
下、アスペクト比３５）
弾性軽量骨材
積木化成品製発泡スチレンビーズ（粒径１ｆｉ、嵩比重
０．０２５）
無機軽量骨材
日本フィライト製フィライト （粒径３００μｍ以下、
比重０．４５）
三機工業製サンキライトＹ−０２
補強繊維
大和紡績製ポリプロピレンＰＺＬ １２ＤＸ１０繊維保
水材
一興人製粉末パルプＨＰ−１０６（乾式パルプ）増粘剤
信越化学工業製メチルセルロース５Ｈ−３００００充填
剤
住人セメント製シリカ粉（ブレーン値１００００）間室
化工製フライアッシュ（ブレーン値３０００）第１表に
示す組成物の原料のうち、水を除く原料をアイリッヒミ
キサー（日本アイリッヒ製）を用いて、１１０００ｒｐ
で約２分間転式混合し、これに水を加えて、更に１１０
００ｒｐで約２分間湿式混合した。次いで、このように
して得た加水混合物をスクリュー押出型混練機（宮崎鉄
工製ＭＰ＝１００型）に投入し、混練して、可塑性を有
する組成物を得た。Cement Normal cement made by Nippon Cement Gypsum made by Yoshino Gypsum Jet cement made by Denki Kagaku Kogyo (Gypsum content: 50
%) Wollastonite Kagaya Kaolin Chemolit A-60 (particle size 250μm or less, aspect ratio 35) Elastic lightweight aggregate building blocks Chemical foam styrene beads (particle size 1fi, bulk specific gravity 0.025) Inorganic lightweight aggregate Japan Fillite manufactured by Fillite (particle size 300μm or less,
Specific gravity 0.45) Sankilite Y-02 manufactured by Sanki Kogyo Reinforcement fiber Polypropylene PZL 12DX10 manufactured by Daiwabo Co., Ltd. Water retention material Powder pulp manufactured by Ikkojin HP-106 (dry pulp) Thickener Methyl cellulose manufactured by Shin-Etsu Chemical 5H-30000 Filler Silica powder made by Susumu Cement (Blaine value 10,000) Fly ash made by Mamuro Kako (Blaine value 3000) Among the raw materials for the composition shown in Table 1, excluding water, using an Eirich mixer (manufactured by Nippon Eirich), 11000rp
Mix for about 2 minutes using an inverter, add water, and mix at 110℃ for about 2 minutes.
Wet mixing was performed at 00 rpm for approximately 2 minutes. Next, the thus obtained hydrated mixture was put into a screw extrusion kneader (MP=100 type manufactured by Miyazaki Iron Works) and kneaded to obtain a composition having plasticity.
この組成物を真空押出機に投入し、成形体は、押出速度
に同調して移動するトレー上に移載しながら引取り、ト
レーとほぼ同じ長さに切断した後、相対湿度１００％、
温度７０℃で１２時間温熱養生して、断面の外側各辺長
さ２００鶴、厚さ１５鶴、長さ２ｍの断面り字型の異形
成形硬化体を得た。This composition is put into a vacuum extruder, and the molded product is taken up while being transferred onto a tray that moves in synchronization with the extrusion speed. After being cut into approximately the same length as the tray, the molded product is placed at a relative humidity of 100%.
Heat curing was carried out at a temperature of 70° C. for 12 hours to obtain a cured body having a cross-sectional shape of a diagonal shape with a length of 200 mm on each outer side, a thickness of 15 mm, and a length of 2 m.
（成形硬化体の強度評価）
上記成形体を長さ２０ｃｍ、幅１５ｃｍ、スパン間距離
１５ｃｍの支点上に載置し、ＪＩＳ Ａ−１４０８（５
号試験片）の方法に準じて、曲げ破壊強度を測定して、
強度を評価した。(Strength evaluation of molded cured product) The molded product was placed on a fulcrum with a length of 20 cm, a width of 15 cm, and a distance between spans of 15 cm, and the JIS A-1408 (5
The bending fracture strength was measured according to the method of
The strength was evaluated.
また、長さ４０１の前記同様の断面り字型の異形成形硬
化体をその角部が上になるように伏せて、中央角部に重
さ２ｋｇの茄子形状の錘を落下させ、角部の亀裂、破断
に至る限界の落下高さを測定して、耐衝撃強度を評価し
た。In addition, a cured body having a length of 401 cm and a cross-section similar to the one described above was placed face down with its corners facing up, and an eggplant-shaped weight weighing 2 kg was dropped onto the central corner. Impact resistance strength was evaluated by measuring the critical fall height that would lead to cracking or breakage.
比重は、前記曲げ破壊強度の測定のための試験片と同じ
ものを用いて、試験片の重量と寸法を測定し、次式によ
って求めた。The specific gravity was determined by using the same test piece as the one used for measuring the bending fracture strength, measuring the weight and dimensions of the test piece, and using the following formula.
比重−試験片の重量Ｘ１００／試験片の体積更に、成形
体の表面にアクリル系水性塗料を塗布し、乾燥後、表面
の凹凸模様の状態を目視で観察した。Specific gravity - weight of test piece x 100/volume of test piece Further, an acrylic water-based paint was applied to the surface of the molded body, and after drying, the state of the uneven pattern on the surface was visually observed.
結果を第１表に示す。尚、比較例２においては、押出の
途中で金型からの流速が変動し、押出圧力も徐々に上昇
し、同時に押出速度が低下した。得られた成形体は高比
重を有し、また、その断面は、顕微鏡観察の結果、無機
軽量骨材が破壊されていることがｉ認された。The results are shown in Table 1. In Comparative Example 2, the flow rate from the mold varied during extrusion, the extrusion pressure also gradually increased, and at the same time the extrusion rate decreased. The obtained compact had a high specific gravity, and microscopic observation of its cross section revealed that the inorganic lightweight aggregate had been destroyed.
特許出願人 積水化学工業株式会社 代表者 廣１） 馨Patent applicant Sekisui Chemical Co., Ltd. Representative Hiro 1) Kaoru
Claims (1)
主成分として含有する押出成形用セメント組成物におい
て、セメント１００重量部に対して、硫酸カルシウム０
．５〜５０重量部とウオラストナイト４５〜３００重量
部と粒径５ｍｍ以下の弾性を有する軽量骨材０．１〜２
０重量部と無機軽量骨材０〜１００重量部とを含有する
ことを特徴とする押出成形用セメント組成物。(1) In a cement composition for extrusion molding containing cement, reinforcing fibers, a fibrous water retention agent, and a thickener as main components, 0 parts of calcium sulfate is added to 100 parts by weight of cement.
．． 5 to 50 parts by weight, 45 to 300 parts by weight of wollastonite, and 0.1 to 2 parts of elastic lightweight aggregate with a particle size of 5 mm or less.
1. A cement composition for extrusion molding, characterized in that it contains 0 parts by weight of an inorganic lightweight aggregate and 0 to 100 parts by weight of an inorganic lightweight aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2204417A JPH0489341A (en) | 1990-07-31 | 1990-07-31 | Cement composition to be extrusion-molded |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2204417A JPH0489341A (en) | 1990-07-31 | 1990-07-31 | Cement composition to be extrusion-molded |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0489341A true JPH0489341A (en) | 1992-03-23 |
Family
ID=16490199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2204417A Pending JPH0489341A (en) | 1990-07-31 | 1990-07-31 | Cement composition to be extrusion-molded |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0489341A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0947482A1 (en) * | 1995-08-16 | 1999-10-06 | Cemcom Corporation | Unsaturated polycations, manufacture and use thereof |
| JP2008081327A (en) * | 2006-09-26 | 2008-04-10 | Nichiha Corp | Inorganic molded product |
| JP2013189348A (en) * | 2012-03-14 | 2013-09-26 | Kmew Co Ltd | Molded panel production method |
| KR20180065977A (en) * | 2015-11-04 | 2018-06-18 | 이메리스 필트레이션 미네랄즈, 인크. | COMPOSITIONS AND METHODS FOR LAMINATING |
-
1990
- 1990-07-31 JP JP2204417A patent/JPH0489341A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0947482A1 (en) * | 1995-08-16 | 1999-10-06 | Cemcom Corporation | Unsaturated polycations, manufacture and use thereof |
| JP2008081327A (en) * | 2006-09-26 | 2008-04-10 | Nichiha Corp | Inorganic molded product |
| JP2013189348A (en) * | 2012-03-14 | 2013-09-26 | Kmew Co Ltd | Molded panel production method |
| KR20180065977A (en) * | 2015-11-04 | 2018-06-18 | 이메리스 필트레이션 미네랄즈, 인크. | COMPOSITIONS AND METHODS FOR LAMINATING |
| JP2019503884A (en) * | 2015-11-04 | 2019-02-14 | アイメリーズ フィルトレーション ミネラルズ，インコーポレイテッド | Compositions and methods for 3D printing |
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