JPH1149552A - Hardenable composition and its hardened body - Google Patents

Hardenable composition and its hardened body

Info

Publication number
JPH1149552A
JPH1149552A JP20661897A JP20661897A JPH1149552A JP H1149552 A JPH1149552 A JP H1149552A JP 20661897 A JP20661897 A JP 20661897A JP 20661897 A JP20661897 A JP 20661897A JP H1149552 A JPH1149552 A JP H1149552A
Authority
JP
Japan
Prior art keywords
pts
magnesium oxide
weight
parts
curing
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
Application number
JP20661897A
Other languages
Japanese (ja)
Inventor
Yuji Hatakeyama
裕二 畠山
Hiroshi Inoue
弘 井上
Katsuhiko Yamamoto
勝彦 山本
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.)
Toyo Kagaku Co Ltd
Original Assignee
Toyo Kagaku Co 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 Toyo Kagaku Co Ltd filed Critical Toyo Kagaku Co Ltd
Priority to JP20661897A priority Critical patent/JPH1149552A/en
Publication of JPH1149552A publication Critical patent/JPH1149552A/en
Pending legal-status Critical Current

Links

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
    • C04B28/10—Lime cements or magnesium oxide cements
    • C04B28/105—Magnesium oxide or magnesium carbonate cements

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

PROBLEM TO BE SOLVED: To obtain a compsn. which hardens under practical molding conditions and gives a hardened body excellent in compressive strength and bending strength without using water glass as a hardenable component by incorporating specified amts. of propylene carbonate and water into magnesium oxide. SOLUTION: Magnesium oxide preferably having 1-500 μm average particle diameter is prepd. preferably as a mixture of soft-burnt magnesium oxide having low bulk specific gravity with hard-burnt magnesium oxide having high bulk specific gravity, 1-60 pts.wt., preferably 1 to <5 pts.wt. or 5-40 pts.wt., especially preferably 1 to <5 pts.wt. or 5-20 pts.wt. propylene glycol and 20-135 pts.wt. water are incorporated into 100 pts.wt. of the magnesium oxide and 30-400 pts.wt. aggregate such as CaCO3 and 0.2-20 pts.wt. fibers such as glass fibers are further incorporated if necessary. Additives such as a defoaming agent, a blowing agent and a chemical admixture for cement may further be added by 0.01-30 pts.wt.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は土木、建築用の硬化
組成物に関し、更に詳細には、特に得られる硬化体の圧
縮強度及び曲げ強度に優れる硬化体組成物及びその硬化
体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cured composition for civil engineering and construction, and more particularly to a cured composition having excellent compressive strength and bending strength of a cured product obtained therefrom, and a cured product thereof.

【０００２】[0002]

【従来の技術】従来、無機硬化組成物として、水ガラス
と呼ばれるアルカリ金属珪酸塩とその硬化剤とを必須の
硬化反応成分として含む組成物が一般に知られている。
例えば、特開昭５７−１９８７８２号公報には、珪酸ソ
ーダ水溶液（Ａ液）と、硫酸水素ナトリウムと塩化カリ
ウムとの混合水溶液、又は該混合水溶液と、（ａ）酸化
マグネシウム及び／又は水酸化マグネシウム、及び／又
は（ｂ）リン酸２水素ナトリウム、リン酸２水素カリウ
ム、リン酸水素２ナトリウム、リン酸水素２カリウム、
硫酸アルミニウム、硫酸マグネシウム、塩化マグネシウ
ム及びカリミョウバンからなる群より選択される少なく
とも１種との混合物水溶液（Ｂ液）、及びこのＢ液中に
エチレンカーボネート及び／又はプロピレンカーボネー
トを含有させ、このＡ液とＢ液とを硬化させて地盤を安
定化させる方法が記載されている。また、米国特許第４
３６３６６５号公報には、（１）砂、（２）アルカリ金
属珪酸塩、（３）アルキレンカーボネート、カルボキシ
ル酸エステル、又はこれらの混合物を含む硬化剤、及び
（４）アルカリ土類金属酸化物又はアルカリ土類金属炭
酸塩と、水和アルミナとの混合物からなる脱型剤との混
合物を含む鋳物型組成物が記載されている。更に、米国
特許第４６８３０１９号明細書には、少なくとも一種の
水溶性アルカリ珪酸塩と、高級脂肪酸の二価以上の金属
の塩等の、水溶性アルカリ珪酸塩のための硬化剤と、熱
吸収性材料及び／又は結合水含有材料とを含む、スチー
ル柱を被覆するための耐火性組成物が開示されている。2. Description of the Related Art Conventionally, as an inorganic curing composition, a composition containing an alkali metal silicate called water glass and a curing agent thereof as essential curing reaction components is generally known.
For example, Japanese Patent Application Laid-Open No. 57-197782 discloses an aqueous sodium silicate solution (solution A), a mixed aqueous solution of sodium hydrogen sulfate and potassium chloride, or the mixed aqueous solution, and (a) magnesium oxide and / or magnesium hydroxide. And / or (b) sodium dihydrogen phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, dipotassium hydrogen phosphate,
An aqueous solution (solution B) of a mixture with at least one selected from the group consisting of aluminum sulfate, magnesium sulfate, magnesium chloride and potassium alum, and the solution B containing ethylene carbonate and / or propylene carbonate. And a method of stabilizing the ground by curing the liquid B. No. 4
JP-A-363665 discloses (1) sand, (2) a hardening agent containing an alkali metal silicate, (3) an alkylene carbonate, a carboxylic acid ester, or a mixture thereof, and (4) an alkaline earth metal oxide or an alkali. A casting composition comprising a mixture of an earth metal carbonate and a release agent comprising a mixture of hydrated alumina is described. Further, U.S. Pat. No. 4,683,019 discloses at least one water-soluble alkali silicate and a curing agent for a water-soluble alkali silicate such as a salt of a divalent or higher-valent metal of a higher fatty acid; A refractory composition for coating a steel column, comprising a material and / or a material containing bound water, is disclosed.

【０００３】一方、このような水ガラスを必須の硬化成
分としない、前記無機硬化組成物とその硬化成分の組成
を全く異にする硬化組成物も提案されている。例えば、
硬化成分として、アルカリ土類金属水酸化物やアルカリ
土類金属酸化物を用いた組成物が知られている。しか
し、これらの硬化成分を硬化させる硬化剤の種類及び配
合量は、アルカリ土類金属水酸化物やアルカリ土類金属
酸化物の種類に対応して異なり、実用的な硬化時間内に
おいて、水ガラスを硬化成分とした硬化体と同程度若し
くはそれ以上の満足し得る強度が得られる硬化体はほと
んど得られていない。そこで、例えば、水等の硬化剤成
分以外に、尿素−ホルムアルデヒド樹脂等の有機バイン
ダーを用いて硬化成分同士の結合力を増強させる手段
（米国特許第５０３６０２９号明細書等）が採用されて
いるにすぎず、硬化剤自体の検討はあまりなされていな
いのが実情である。On the other hand, there has been proposed a curing composition which does not use such water glass as an essential curing component and has a completely different composition from the above-mentioned inorganic curing composition and its curing component. For example,
Compositions using an alkaline earth metal hydroxide or an alkaline earth metal oxide as a curing component are known. However, the type and amount of the curing agent that cures these curing components differ depending on the type of the alkaline earth metal hydroxide or alkaline earth metal oxide, and the water glass is used within a practical curing time. A cured body having a satisfactory strength equal to or higher than that of a cured body containing as a curing component has hardly been obtained. Therefore, for example, means for increasing the bonding strength between the curing components using an organic binder such as urea-formaldehyde resin in addition to the curing agent component such as water (US Pat. No. 5,360,029) has been adopted. The fact is that the curing agent itself has not been studied much.

【０００４】[0004]

【発明が解決しようとする課題】本発明の目的は、硬化
成分として水ガラスを含有せず、実用的な成形条件下で
硬化し、得られる硬化体が、優れた圧縮強度及び曲げ強
度を有する硬化組成物及び硬化体を提供することにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to provide a cured product which does not contain water glass as a curing component and which is cured under practical molding conditions and has excellent compressive strength and bending strength. It is to provide a cured composition and a cured product.

【０００５】[0005]

【課題を解決するための手段】本発明によれば、酸化マ
グネシウム、プロピレンカーボネート及び水を含み、プ
ロピレンカーボネート及び水の配合割合が、酸化マグネ
シウム１００重量部に対して、プロピレンカーボネート
１〜６０重量部及び水２０〜１３５重量部であることを
特徴とする硬化組成物、及び必要に応じて更に骨材を含
む硬化組成物、及び必要に応じて上記酸化マグネシウム
１００重量部に対して３０〜４００重量部の骨材を含有
させたことを特徴とする硬化組成物が提供される。また
本発明によれば、前記硬化組成物を硬化させた硬化体が
提供される。According to the present invention, magnesium oxide, propylene carbonate and water are contained. The mixing ratio of propylene carbonate and water is 1 to 60 parts by weight of propylene carbonate with respect to 100 parts by weight of magnesium oxide. And 20 to 135 parts by weight of water, and if necessary, 30 to 400 parts by weight with respect to 100 parts by weight of the above magnesium oxide. The present invention provides a cured composition characterized by containing a part of aggregate. Further, according to the present invention, there is provided a cured product obtained by curing the curing composition.

【０００６】[0006]

【発明の実施の形態】以下本発明を更に詳細に説明す
る。本発明の硬化組成物は、硬化成分である酸化マグネ
シウム（ＭｇＯ）と、硬化剤であるプロピレンカーボネ
ート及び水を含み、これらを特定割合で配合することを
特徴とする。本発明の硬化組成物には、必要に応じて骨
材、補強繊維、顔料等を含有させることができ、特に骨
材の含有が好ましい。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in more detail. The curing composition of the present invention contains magnesium oxide (MgO) as a curing component, propylene carbonate and water as a curing agent, and is blended in a specific ratio. The cured composition of the present invention can contain an aggregate, a reinforcing fiber, a pigment, and the like, if necessary, and the inclusion of an aggregate is particularly preferable.

【０００７】前記硬化成分としての酸化マグネシウム
は、ソフトバーン（嵩比重の小さい軽焼）、ハードバー
ン（嵩比重の大きい硬焼）のいずれでも良く、これらは
混合物として用いるのが好ましい。なお、酸化マグネシ
ウムの調製法によっては、例えばFe2O3、Al2O3、SiO2、
TiO2、Na2O、K2O等の他の金属酸化物；MgCO3、CaCO3、S
rCO3、BaCO3等の炭酸塩、Mg(OH)2、Ca(OH)2等の水酸化
物等の天然鉱物含有成分が微量含まれていても良い。The magnesium oxide as the hardening component may be any of soft burn (light baking with a small bulk specific gravity) and hard burn (hard baking with a large bulk specific gravity), and these are preferably used as a mixture. In addition, depending on the preparation method of magnesium oxide, for example, Fe 2 O 3 , Al 2 O 3 , SiO 2 ,
Other metal oxides such as TiO 2 , Na 2 O, K 2 O; MgCO 3 , CaCO 3 , S
Trace amounts of natural mineral-containing components such as carbonates such as rCO 3 and BaCO 3 and hydroxides such as Mg (OH) 2 and Ca (OH) 2 may be contained.

【０００８】酸化マグネシウムは、通常粉末として用い
るが、その粒径は特に限定されるものではないが、平均
粒径１〜５００μｍが好ましい。[0008] Magnesium oxide is usually used as a powder, but the particle size is not particularly limited, but the average particle size is preferably 1 to 500 µm.

【０００９】前記硬化剤としてのプロピレンカーボネー
トは、液状物であって、その配合割合は、酸化マグネシ
ウム１００重量部に対して１〜６０重量部、好ましくは
１重量部以上、５重量部未満、若しくは５〜４０重量
部、特に好ましくは１重量部以上、５重量部未満、若し
くは５〜２０重量部であるが、本発明の組成物が骨材を
含む場合には、プロピレンカーボネートの配合量が４０
〜６０重量部であっても好ましい強度を得ることができ
る。プロピレンカーボネートの配合量が、１〜６０重量
部の範囲外では、得られる硬化体の強度が充分でない
か、均一組成の硬化体を得ることができない。前記硬化
剤としての水の配合割合は、酸化マグネシウム１００重
量部に対して２０〜１３５重量部の範囲である。この範
囲外では、得られる硬化体の強度が充分でないか、均一
組成の硬化体を得ることができない。[0009] The propylene carbonate as the curing agent is a liquid substance, and its compounding ratio is 1 to 60 parts by weight, preferably 1 to 5 parts by weight, or 100 parts by weight of magnesium oxide. 5 to 40 parts by weight, particularly preferably 1 part by weight or more and less than 5 parts by weight, or 5 to 20 parts by weight. When the composition of the present invention contains aggregate, the amount of propylene carbonate is 40 parts by weight.
A preferred strength can be obtained even when the amount is up to 60 parts by weight. When the amount of propylene carbonate is out of the range of 1 to 60 parts by weight, the strength of the obtained cured product is not sufficient or a cured product having a uniform composition cannot be obtained. The mixing ratio of water as the curing agent is in the range of 20 to 135 parts by weight based on 100 parts by weight of magnesium oxide. Outside this range, the strength of the resulting cured product is not sufficient or a cured product having a uniform composition cannot be obtained.

【００１０】本発明の硬化組成物に必要に応じて配合で
きる骨材としては、普通骨材、軽量骨材等が挙げられ
る。普通骨材としては、珪砂；珪石粉；寒水石、花崗
岩、安山岩、大理石をはじめとする天然石の粉砕品；高
炉スラグ等が挙げられる。軽量骨材としては、膨張粘
土、膨張けつ岩、蛭石、黒曜石、真珠岩の焼成品；シラ
スバルーン、ガラスバルーン等が挙げられる。これらの
骨材は、目的に応じて単独あるいは複合して用いること
ができる。また、上記繊維としては、ガラス繊維、金属
繊維、有機繊維等の補強繊維が挙げられる。骨材の粒度
及び繊維の長さは、本発明の所望の効果が損なわれない
範囲で適宜選択することができる。骨材を配合する場合
の配合割合は、酸化マグネシウム１００重量部に対し
て、３０〜４００重量部の範囲が好ましい。３０重量部
未満では、骨材を配合することによるコスト低下効果が
期待できず、一方、４００重量部を超える場合には、得
られる硬化体の強度が低下する恐れがあるので好ましく
ない。繊維を配合する場合の配合割合は、酸化マグネシ
ウム１００重量部に対して、０．２〜２０重量部の範囲
が好ましい。[0010] Aggregates which can be added to the cured composition of the present invention as necessary include ordinary aggregates and lightweight aggregates. Examples of the common aggregate include quartz sand; quartzite powder; crushed natural stones such as cold water stone, granite, andesite, and marble; and blast furnace slag. Examples of the lightweight aggregate include fired products of expanded clay, expanded shale, vermiculite, obsidian, and pearlite; shirasu balloons, glass balloons, and the like. These aggregates can be used alone or in combination depending on the purpose. Examples of the fibers include reinforcing fibers such as glass fibers, metal fibers, and organic fibers. The particle size of the aggregate and the length of the fiber can be appropriately selected within a range that does not impair the desired effects of the present invention. When the aggregate is mixed, the mixing ratio is preferably in the range of 30 to 400 parts by weight with respect to 100 parts by weight of magnesium oxide. If the amount is less than 30 parts by weight, the effect of reducing the cost by blending the aggregate cannot be expected. On the other hand, if it exceeds 400 parts by weight, the strength of the obtained cured product may decrease, which is not preferable. When the fibers are blended, the blending ratio is preferably in the range of 0.2 to 20 parts by weight based on 100 parts by weight of magnesium oxide.

【００１１】本発明の硬化組成物には、前記各成分の他
に、更に消泡剤、気泡剤、その他セメント用化学混和剤
等を添加することもできる。これら他の添加剤は、通
常、酸化マグネシウム１００重量部に対して、０．０１
〜３０重量部の範囲で添加することができる。The curable composition of the present invention may further contain, in addition to the above components, an antifoaming agent, a foaming agent, and other chemical admixtures for cement. These other additives are generally used in an amount of 0.01 to 100 parts by weight of magnesium oxide.
It can be added in the range of up to 30 parts by weight.

【００１２】本発明の硬化体は、その形状及び大きさ、
並びに養生時間等により異なるが、例えば、４×４×１
６ｃｍの型枠に流し込んで得た硬化体を２８日間養生し
た際の圧縮強度(JIS R 5201)は、１５０ｋｇｆ／ｃｍ2
以上が必須とされ、好ましくは２００ｋｇｆ／ｃｍ2以
上、特に好ましくは３００ｋｇｆ／ｃｍ2以上がよく、
且つ曲げ強度(JIS R 5201)は、４０ｋｇｆ／ｃｍ2以上
が必須とされ、好ましくは５０ｋｇｆ／ｃｍ2以上がよ
い。The cured product of the present invention has a shape and size,
It depends on the curing time, etc., for example, 4 × 4 × 1
The compressive strength (JIS R 5201) when the cured product obtained by pouring into a 6 cm mold was cured for 28 days was 150 kgf / cm 2.
The above is essential, preferably 200 kgf / cm 2 or more, particularly preferably 300 kgf / cm 2 or more,
And the bending strength (JIS R 5201) is a 40 kgf / cm 2 or more is required, preferably from 50 kgf / cm 2 or more.

【００１３】本発明の硬化組成物を硬化体に製造する製
造法について説明する。この製造法としては、前記硬化
組成物を混合し、室温養生や加温加湿養生等のように焼
成しないで硬化させる方法がある。まず、硬化組成物の
混合は、硬化成分と硬化剤と、必要により骨材とを同時
に混練する方法、硬化剤を予め混合した後に硬化成分に
混合混練する方法、硬化剤としてのプロピレンカーボネ
ートの全てと水の一部とを予めエマルジョンとし、得ら
れたエマルジョンと残りの水と硬化成分とを混練する方
法等のいずれでも良く、このような混練により硬化組成
物は通常スラリー化する。A method for producing the cured composition of the present invention into a cured product will be described. As the production method, there is a method in which the above-mentioned curing composition is mixed and cured without firing such as room temperature curing or warming and humidifying curing. First, the mixing of the curing composition is performed by simultaneously kneading the curing component and the curing agent and, if necessary, the aggregate, a method of mixing and kneading the curing component after the curing agent is previously mixed, and all of propylene carbonate as the curing agent. And a part of water are previously made into an emulsion, and the resulting emulsion, the remaining water, and a hardening component may be kneaded. The kneading usually turns the hardened composition into a slurry.

【００１４】スラリー化した硬化組成物を硬化させるに
際しては、要求される硬化体の寸法、物性及び生産効率
等を考慮して、例えばスラリーを、流し込み成型、プレ
ス成型、押出成型、吹付成型等を行った後、焼成を行う
ことなく、例えば凝結後に蒸気養生等の加温加湿養生を
行うことにより、打設後１日程度であっても実用強度が
得られる。In curing the slurried cured composition, the slurry may be cast, press-formed, extrusion-molded, spray-molded, etc., taking into account the required dimensions, physical properties and production efficiency of the cured product. After the sintering, the sintering is performed, for example, by heating and humidifying curing such as steam curing after setting, whereby practical strength can be obtained even about one day after the casting.

【００１５】前記成型にあたっては、適度な可使時間が
必要となるが、該可使時間を制御するために凝結遅延
剤、凝結促進剤等を、硬化組成物、硬化剤又はスラリー
に添加することもできる。前記凝結遅延剤としては、硼
酸及びその塩、オキシカルボン酸及びその塩、ＥＤＴＡ
（エチレン・ジアミン・四酢酸）及びその塩、多価アル
コール及びその塩並びに珪弗化物又はこれらの混合物等
を挙げることができ、一方、前記凝結促進剤としては、
Na2CO3、K2CO3、NaCl、KCl、MgCl2、CaCl2、アルミン酸
ナトリウム、ミョウバン又はこれらの混合物等を挙げる
ことができる。凝結遅延剤及び凝結促進剤の添加量はそ
れぞれ、酸化マグネシウム１００重量部に対して、０．
５〜３０重量部の範囲が好ましい。In the molding, an appropriate pot life is required. In order to control the pot life, a setting retarder, a setting accelerator and the like are added to the curing composition, the curing agent or the slurry. Can also. Examples of the setting retarder include boric acid and its salts, oxycarboxylic acid and its salts, EDTA
(Ethylene diamine tetraacetic acid) and salts thereof, polyhydric alcohols and salts thereof, silicofluorides and mixtures thereof, and the like. On the other hand, examples of the setting accelerator include:
Examples include Na 2 CO 3 , K 2 CO 3 , NaCl, KCl, MgCl 2 , CaCl 2 , sodium aluminate, alum, or mixtures thereof. The addition amounts of the setting retarder and the setting accelerator are each 0.1 to 100 parts by weight of magnesium oxide.
A range of 5 to 30 parts by weight is preferred.

【００１６】[0016]

【発明の効果】本発明の硬化組成物は、硬化成分である
酸化マグネシウムと、硬化剤であるプロピレンカーボネ
ート及び水を含み、これらを特定割合で配合するので、
実用的な成形条件下で硬化させることができ、特に優れ
た圧縮強度及び曲げ強度を有する硬化体を得ることがで
きる。本発明の硬化体は、酸化マグネシウムを硬化成分
とし、優れた圧縮強度及び曲げ強度を有するので、タイ
ル、壁材、天板、天井板、床材等の建築材料として有用
である。The cured composition of the present invention contains magnesium oxide as a curing component, propylene carbonate and water as a curing agent, and is blended in a specific ratio.
The composition can be cured under practical molding conditions, and a cured product having particularly excellent compressive strength and flexural strength can be obtained. Since the cured product of the present invention contains magnesium oxide as a curing component and has excellent compressive strength and flexural strength, it is useful as a building material for tiles, wall materials, top plates, ceiling plates, floor materials and the like.

【００１７】[0017]

【実施例】以下実施例及び比較例により更に詳細に説明
するが、本発明はこれらに限定されるものではない。な
お、表中の硬化成分、硬化剤及び添加物の数値の単位は
重量部である。実施例１、比較例１及び２ 表１に示す硬化成分と硬化剤を、モルタルミキサーで混
練してそれぞれスラリー化した。次いで得られた各スラ
リーを、テーブルバイブレーター上で４×４×１６ｃｍ
の型枠に流し込み、振動を与えながら成型した。２４時
間後成型体を型枠から脱抜し、２０℃において２８日間
養生を行ないそれぞれの硬化体を調製した。得られた各
々の硬化体について、ＪＩＳ Ｒ ５２０１に準拠して曲
げ強度及び圧縮強度を測定した。結果を表１に示す。な
お、表１中において、ＭｇＯ（軽焼酸化マグネシウム、
硬焼酸化マグネシウムの双方）は日本海水化工社製、プ
ロピレンカ−ボネ−トは東亜合成化学工業社製を使用し
た。The present invention will be described in more detail with reference to the following Examples and Comparative Examples, but the present invention is not limited thereto. The units of the numerical values of the curing components, curing agents and additives in the table are parts by weight. Example 1, Comparative Examples 1 and 2 The curing components and curing agents shown in Table 1 were kneaded with a mortar mixer to form slurries. Each slurry obtained was then placed on a table vibrator at 4 × 4 × 16 cm
And molded while applying vibration. After 24 hours, the molded body was removed from the mold and cured at 20 ° C. for 28 days to prepare respective cured bodies. The bending strength and the compressive strength of each of the obtained cured products were measured in accordance with JIS R5201. Table 1 shows the results. In Table 1, MgO (lightly burned magnesium oxide,
Both hard-burned magnesium oxides were manufactured by Nippon Kaisui Kako Co., Ltd., and propylene carbonate was manufactured by Toa Gosei Chemical Industries.

【００１８】[0018]

【表１】 [Table 1]

【００１９】表１の結果より、硬化剤としてのプロピレ
ンカーボネートの配合量が酸化マグネシウム１００重量
部に対して１重量部未満では、得られる硬化体の強度が
著しく低下することがわかる。From the results shown in Table 1, it can be seen that when the blending amount of propylene carbonate as a curing agent is less than 1 part by weight based on 100 parts by weight of magnesium oxide, the strength of the obtained cured product is significantly reduced.

【００２０】実施例２〜６、比較例３及び４ 表２に示す硬化成分、硬化剤及び骨材を用いて、実施例
１と同様に硬化体を調製し、各測定を行った。結果を表
２に示す。なお、骨材は、日東粉化工業株式会社社製の
ＣａＣＯ3（商品名「寒水＃５０」）を用いた。 Examples 2 to 6, Comparative Examples 3 and 4 Using the curing components, curing agents and aggregates shown in Table 2, cured products were prepared in the same manner as in Example 1, and each measurement was performed. Table 2 shows the results. The aggregate used was CaCO 3 (trade name “Kyosui # 50”) manufactured by Nitto Powder Chemical Industry Co., Ltd.

【００２１】[0021]

【表２】 [Table 2]

【００２２】表２の結果より、水の配合割合が酸化マグ
ネシウム１００重量部に対して２０重量部未満及び１３
５重量部を超えると、得られる硬化体の強度が著しく低
下することがわかる。From the results shown in Table 2, the mixing ratio of water was less than 20 parts by weight and 100 parts by weight of magnesium oxide.
When the amount exceeds 5 parts by weight, the strength of the obtained cured product is significantly reduced.

【００２３】実施例７及び８、比較例５〜１０ 表３に示す硬化成分及び硬化剤を用いて、実施例１と同
様に硬化体を調製し、各測定を行った。結果を表３に示
す。なお、珪酸Ｎａは、日本化学工業株式会社製の３号
珪酸ソーダを用いた。 Examples 7 and 8, Comparative Examples 5 to 10 Cured products were prepared in the same manner as in Example 1 using the curing components and curing agents shown in Table 3, and each measurement was performed. Table 3 shows the results. The sodium silicate used was No. 3 sodium silicate manufactured by Nippon Chemical Industry Co., Ltd.

【００２４】[0024]

【表３】 [Table 3]

【００２５】表３の結果より、本発明の硬化組成物によ
り得られる硬化体は、硬化成分として、従来無機硬化組
成物に使用されている水ガラスとしての珪酸ソーダを含
有させたものよりも著しく優れた強度を有することがわ
かる。From the results shown in Table 3, the cured product obtained from the cured composition of the present invention is much more remarkable than the one containing sodium silicate as water glass conventionally used in inorganic cured compositions as a curing component. It turns out that it has excellent strength.

【００２６】実施例９ プロピレンカーボネート７６．９重量％、プロピレング
リコール７．７重量％、非イオン系界面活性剤（商品名
「アデカトール ＮＰ−７６０」、旭電化工業株式会社
製）７．７重量％及び水７．７重量％からなるエマルジ
ョンを調製した。このエマルジョン７重量部と、水９３
重量部と、硬化成分としての酸化マグネシウム（軽焼酸
化マグネシウム９０重量部及び硬焼酸化マグネシウム１
０重量部）１００重量部とからなる硬化組成物（酸化マ
グネシウム１００重量部に対して、プロピレンカーボネ
ート５重量部、水９３．５重量部）を用いて、実施例１
と同様に硬化体を調製し、各測定を行った。その結果、
曲げ強度は５０．３ｋｇｆ／ｃｍ2であり、圧縮強度は
２０１．１ｋｇｆ／ｃｍ2であった。 Example 9 76.9% by weight of propylene carbonate, 7.7% by weight of propylene glycol, 7.7% by weight of a nonionic surfactant (trade name "ADEKATOL NP-760", manufactured by Asahi Denka Kogyo KK) And 7.7% by weight of water. 7 parts by weight of this emulsion and 93 parts of water
Parts by weight and magnesium oxide as a hardening component (90 parts by weight of light-burned magnesium oxide and 1 part of hard-burned magnesium oxide
Example 1 using a cured composition consisting of 100 parts by weight (0 parts by weight) (100 parts by weight of magnesium oxide, 5 parts by weight of propylene carbonate and 93.5 parts by weight of water).
A cured product was prepared in the same manner as described above, and each measurement was performed. as a result,
The flexural strength was 50.3 kgf / cm 2 and the compressive strength was 201.1 kgf / cm 2 .

【００２７】実施例１０ 実施例９で調製したエマルジョン２６重量部、水７４重
量部及び硬化成分としての酸化マグネシウム（軽焼酸化
マグネシウム８５重量部及び硬焼酸化マグネシウム１５
重量部）１００重量部とからなる硬化組成物（酸化マグ
ネシウム１００重量部に対して、プロピレンカーボネー
ト２０重量部、水７６重量部）を用いて、実施例１と同
様に硬化体を調製し、各測定を行った。その結果、曲げ
強度は５３．８ｋｇｆ／ｃｍ2であり、圧縮強度は１９
２．１ｋｇｆ／ｃｍ2であった。 Example 10 26 parts by weight of the emulsion prepared in Example 9, 74 parts by weight of water and magnesium oxide as a hardening component (85 parts by weight of light-burned magnesium oxide and 15 parts of hard-burned magnesium oxide 15
100 parts by weight) of the cured composition (20 parts by weight of propylene carbonate and 76 parts by weight of water with respect to 100 parts by weight of magnesium oxide) to prepare a cured product in the same manner as in Example 1. A measurement was made. As a result, the flexural strength was 53.8 kgf / cm 2 and the compressive strength was 19
It was 2.1 kgf / cm 2 .

【００２８】実施例１１〜１５及び比較例１１ 表４に示す硬化成分、硬化剤及び骨材を用いて、実施例
１と同様に硬化体を調製し、各測定を行った。結果を表
４に示す。なお、骨材は実施例５と同様な骨材を用い
た。 Examples 11 to 15 and Comparative Example 11 Using the curing components, curing agents and aggregates shown in Table 4, cured products were prepared in the same manner as in Example 1, and each measurement was carried out. Table 4 shows the results. The aggregate used was the same as in Example 5.

【００２９】[0029]

【表４】 [Table 4]

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０４Ｂ 103:10 ──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. 6 Identification code FI C04B 103: 10

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 酸化マグネシウム、プロピレンカーボネ
ート及び水を含み、プロピレンカーボネート及び水の配
合割合が、酸化マグネシウム１００重量部に対して、プ
ロピレンカーボネート１〜６０重量部及び水２０〜１３
５重量部であることを特徴とする硬化組成物。1. A composition containing magnesium oxide, propylene carbonate and water, wherein the mixing ratio of propylene carbonate and water is 1 to 60 parts by weight of propylene carbonate and 20 to 13 parts by weight of water with respect to 100 parts by weight of magnesium oxide.
A cured composition characterized by being 5 parts by weight. 【請求項２】 請求項１記載の硬化組成物において、上
記酸化マグネシウム１００重量部に対して３０〜４００
重量部の骨材を含有させたことを特徴とする硬化組成
物。2. The cured composition according to claim 1, wherein the composition is 30 to 400 parts by weight based on 100 parts by weight of the magnesium oxide.
A cured composition comprising parts by weight of aggregate. 【請求項３】 請求項１又は２に記載の硬化組成物を硬
化させた硬化体。3. A cured product obtained by curing the cured composition according to claim 1 or 2.
JP20661897A 1997-07-31 1997-07-31 Hardenable composition and its hardened body Pending JPH1149552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20661897A JPH1149552A (en) 1997-07-31 1997-07-31 Hardenable composition and its hardened body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20661897A JPH1149552A (en) 1997-07-31 1997-07-31 Hardenable composition and its hardened body

Publications (1)

Publication Number Publication Date
JPH1149552A true JPH1149552A (en) 1999-02-23

Family

ID=16526366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20661897A Pending JPH1149552A (en) 1997-07-31 1997-07-31 Hardenable composition and its hardened body

Country Status (1)

Country Link
JP (1) JPH1149552A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004530627A (en) * 2001-06-14 2004-10-07 ス、クンヒ Building material molding method using magnesium oxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004530627A (en) * 2001-06-14 2004-10-07 ス、クンヒ Building material molding method using magnesium oxide

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