JP6258692B2 - Molding mortar composition - Google Patents
Molding mortar composition Download PDFInfo
- Publication number
- JP6258692B2 JP6258692B2 JP2013261935A JP2013261935A JP6258692B2 JP 6258692 B2 JP6258692 B2 JP 6258692B2 JP 2013261935 A JP2013261935 A JP 2013261935A JP 2013261935 A JP2013261935 A JP 2013261935A JP 6258692 B2 JP6258692 B2 JP 6258692B2
- Authority
- JP
- Japan
- Prior art keywords
- parts
- mass
- mortar composition
- molding
- coal ash
- 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.)
- Active
Links
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)
Description
本発明は、石炭灰を人工骨材として再資源化して有効利用するための成型用モルタル組成物に関する。 The present invention relates to a molding mortar composition for recycling and effectively using coal ash as an artificial aggregate.
火力発電所などの石炭焚きボイラーなどから発生する石炭灰が、石炭使用量にほぼ比例して増加しているため、石炭灰の有効利用が大きな課題となっている。石炭灰の有効利用方法としては、人工骨材としての利用がその需要量の大きさから大量処理の面で適している。この石炭灰による骨材の製造方法の一つとして、石炭灰にセメント、石膏、廃ガラス等を添加して成型後蒸気養生して製造する方法が知られている（特許文献１、２）。 Since coal ash generated from coal-fired boilers at thermal power plants and the like is increasing in proportion to the amount of coal used, effective utilization of coal ash is a major issue. As an effective utilization method of coal ash, utilization as an artificial aggregate is suitable in terms of mass processing because of its large demand. As one method for producing aggregates from coal ash, a method is known in which cement, gypsum, waste glass or the like is added to coal ash and then steam-cured after molding (Patent Documents 1 and 2).
石炭灰をセメントで成型し固化する場合には、石炭灰にセメントを加えた混合物を加水し、撹拌などの作製手段によって作製しているが、人工骨材などの用途に適合するまで固化物の強度を増進させるには、硬化時間（前養生時間）が非常に長くかかるのが現状である。そこで石炭灰とセメントからなる混合物を加水して作製する工程において、混合物を加温することによって型枠成型時からセメントの水和反応を進行させることで成型物の硬化時間を短縮する方法が提案されている（特許文献３）。 When coal ash is molded with cement and solidified, the mixture of coal ash and cement is added to the mixture by means of stirring and other means of preparation. The current situation is that the curing time (pre-curing time) takes a very long time to increase the strength. Therefore, in the process of making a mixture of coal ash and cement by adding water, a method has been proposed to shorten the setting time of the molded product by heating the mixture to advance the hydration reaction of the cement from the time of molding. (Patent Document 3).
特許文献３記載の方法によれば、養生時間は短縮されたものの、石炭焚きボイラーから発生する石炭灰には品質のバラつきがあり、石炭灰等の材料の品質のバラつきによって、硬化時間にバラつきがあり、硬化するまでの間の耐衝撃性、耐振動性等が十分でなく、安定した強度を有する人工骨材が得られないという問題があった。
従って、本発明の課題は、石炭灰を大量に使用した骨材等の成型物を作製する場合の前養生時間を短縮させることが出来、加えて石炭灰などの品質のバラつきによる硬化時間の遅延を抑制させることが出来る成型用モルタル組成物を提供することにある。
According to the method described in Patent Document 3, although the curing time is shortened, the coal ash generated from the coal-fired boiler has a quality variation, and the variation in the quality of the material such as coal ash causes a variation in the curing time. In addition, there is a problem that impact resistance, vibration resistance, and the like before curing are not sufficient, and an artificial bone having a stable strength cannot be obtained.
Therefore, the object of the present invention is to reduce the pre-curing time in the case of producing a molded product such as aggregate using a large amount of coal ash, and in addition, delay of the hardening time due to the quality variation of coal ash etc. An object of the present invention is to provide a molding mortar composition capable of suppressing the above.
そこで本発明者は、成型用モルタル組成物の硬化までの時間の短縮と安定化を図るべく種々検討した結果、石炭灰及びセメントに加えてカルシウムアルミネート、石膏及び凝結調整剤を一定量の範囲で配合した混合粉末を用いれば、短かい養生時間で硬化し、かつ硬化性が安定するため、結果として型枠回転率が向上することを見出し、本発明を完成した。 Accordingly, as a result of various studies to shorten and stabilize the time to cure of the molding mortar composition, the present inventor has found that calcium aluminate, gypsum, and a coagulation adjusting agent are added in a certain range in addition to coal ash and cement. As a result, the present inventors have found that the mold rotation rate is improved because the mixed powder blended in (1) is cured in a short curing time and the curability is stabilized, and as a result, the mold rotation rate is improved.
すなわち、本発明は、次の〔１〕〜〔５〕を提供するものである。 That is, the present invention provides the following [1] to [5] .
〔１〕石炭灰１００質量部に対して、ポルトランドセメント１５〜４５質量部、カルシウムアルミネート１．５〜４質量部、石膏１．５〜４質量部、及び凝結調整剤０．０５〜０．９質量部を含有する混合粉末に加水することで得られる成型用モルタル組成物。
〔２〕混合粉末１００質量部に対して水２３〜３３質量部を加水することで得られる〔１〕記載の成型用モルタル組成物。
〔３〕カルシウムアルミネートが、ＣａＯ／Ａｌ 2 Ｏ 3 のモル比が１．２〜１．６である〔１〕又は〔２〕記載の成型用モルタル組成物。
蒸気養生することで得られる〔１〕又は〔２〕記載の成型用モルタル組成物。
〔４〕人工骨材用である〔１〕〜〔３〕のいずれかに記載の成型用モルタル組成物。
〔５〕〔１〕〜〔４〕のいずれかに記載の成型用モルタル組成物を、加水後、成型し、蒸気養生することを特徴とする成型物の製造方法。
[1] 15 to 45 parts by mass of Portland cement, 1.5 to 4 parts by mass of calcium aluminate, 1.5 to 4 parts by mass of plaster, and 0.05 to 0. A molding mortar composition obtained by adding water to a mixed powder containing 9 parts by mass.
[2] The molding mortar composition according to [1], obtained by adding 23 to 33 parts by mass of water to 100 parts by mass of the mixed powder.
[3] The molding mortar composition according to [1] or [2] , wherein the calcium aluminate has a CaO / Al 2 O 3 molar ratio of 1.2 to 1.6.
The molding mortar composition according to [1] or [2], which is obtained by steam curing.
[4] The molding mortar composition according to any one of [1] to [3], which is for artificial aggregates.
[5] A method for producing a molded product, wherein the molding mortar composition according to any one of [1] to [4] is added with water and then molded and steam-cured.
本発明の成型用モルタル組成物を用いれば、短時間で、かつ石炭灰の品質が相違しても硬化するまでの耐衝撃性、耐振動性が安定しており、安定して強度の高い人工骨材として有用な成型物が得られる。また、原料石炭灰の品質がバラついても、同一の硬化時間で安定して強度の高い成型物が得られるため、型枠回転率が高く、大量生産に向いている。 If the molding mortar composition of the present invention is used, the impact resistance and vibration resistance until it hardens even if the quality of coal ash is different in a short time, and the artificial strength is stable and high in strength. A molding useful as an aggregate is obtained. Moreover, even if the quality of the raw coal ash varies, a molded product having a high strength can be obtained stably in the same curing time, so that the mold rotation rate is high and suitable for mass production.
本発明の成型用モルタル組成物は、石炭灰１００質量部に対して、ポルトランドセメント１５〜４５質量部、カルシウムアルミネート１．５〜４質量部、石膏１．５〜４質量部、及び凝結調整剤０．０５〜０．９質量部を含有する混合粉末に加水することで得られる。 The molding mortar composition of the present invention is 15 to 45 parts by weight of Portland cement, 1.5 to 4 parts by weight of calcium aluminate, 1.5 to 4 parts by weight of gypsum, and a coagulation adjuster with respect to 100 parts by weight of coal ash. It is obtained by adding water to a mixed powder containing 0.05 to 0.9 parts by mass of the agent.
本発明で使用する石炭灰は、火力発電所などの石炭焚きボイラーから排出される石炭灰であれば、何れも使用することができるが、長期強度発現の主体となる無定形のＳｉＯ2化合物が大きく減少することにより骨材強度が低下するのを防止し、石炭灰中のフラックス成分が減少することにより強度発現の主体となる無定形のＳｉＯ2化合物の生成が困難になるのを防止する点から、ＳｉＯ2の含有率が３０〜８０質量％の石炭灰を用いることが好ましい。
また、本発明で使用する石炭灰は、フライアッシュでもクリンカアッシュでもよいが、粒子分布が０．１ｍｍ以下が９０％以上を占めるフライアッシュである必要はなく、粒度分布が０．１〜１ｍｍが５０％、１ｍｍ以上が５０％程度のクリンカアッシュでよい。
Coal ash used in the present invention, if the coal ash discharged from coal fired boilers such as thermal power plants, but can be any used, SiO 2 compounds amorphous composed mainly of long-term strength development is The point that the aggregate strength is prevented from lowering due to a large decrease, and the generation of amorphous SiO 2 compounds, the main component of strength development, is prevented from decreasing due to the decrease in the flux components in the coal ash. Therefore, it is preferable to use coal ash having a SiO 2 content of 30 to 80% by mass.
In addition, the coal ash used in the present invention may be fly ash or clinker ash, but it is not necessary that the particle distribution is 0.1% or less and fly ash occupying 90% or more, and the particle size distribution is 0.1 to 1 mm. Clinker ash with 50%, 1 mm or more may be about 50%.
本発明で使用するポルトランドセメントは、通常市販されている普通、早強、中庸熱、および超早強等の各種ポルトランドセメントであれば、何れでも問題はないが、普通セメントがより好ましい。ポルトランドセメントの使用量としては、石炭灰１００質量部に対して、１５〜４５質量部であり、より好ましくは、２５〜３５質量部である。ポルトランドセメント使用量が１５質量部未満の場合、結合材量が少ないため練り込むのが困難になる、あるいは強度発現性が不良になる恐れがある。また、４５質量部を超える場合、初期凝結向上の効果が薄れる恐れがある。 The Portland cement used in the present invention may be any portland cement such as ordinary, early strength, moderately hot, and very early strength, which are usually commercially available, but ordinary cement is more preferable. As usage-amount of Portland cement, it is 15-45 mass parts with respect to 100 mass parts of coal ash, More preferably, it is 25-35 mass parts. When the amount of Portland cement used is less than 15 parts by mass, the amount of the binder is so small that it is difficult to knead or the strength development may be poor. Moreover, when it exceeds 45 mass parts, there exists a possibility that the effect of an initial stage condensation improvement may fade.
本発明で使用するカルシウムアルミネートは、初期凝結や強度発現性を向上させるものであり、ＣａＯ原料やＡｌ2Ｏ3原料等を混合したものをキルンで焼成したり、電気炉で溶融したりするなどの熱処理をして得られるものであり、注水後の初期にセメント組成物の凝結を起こさせる速硬成分である。 The calcium aluminate used in the present invention improves initial coagulation and strength development, and a mixture of a CaO raw material, an Al 2 O 3 raw material, etc. is fired in a kiln or melted in an electric furnace. It is obtained by heat treatment such as, and is a fast-hardening component that causes the cement composition to coagulate in the initial stage after water injection.
カルシウムアルミネートの鉱物成分としては、Ｃ3Ａ（３ＣａＯ・Ａｌ2Ｏ3）、Ｃ12Ａ7（１２ＣａＯ・７Ａｌ2Ｏ3）、ＣＡ（ＣａＯ・Ａｌ2Ｏ3）およびＣＡ2（ＣａＯ・２Ａｌ2Ｏ3）などで示されるカルシウムアルミネート熱処理物を粉砕したものなどが挙げられる。さらに、その他の成分として、ＳｉＯ2を含有するアルミノ珪酸カルシウム、Ｃ12Ａ7の１つのＣａＯをＣａＦ2などのハロゲン化物で置き換えたＣ11Ａ7・ＣａＸ2（Ｘはフッ素のハロゲン）、ＳＯ3成分を含むＣ4Ａ3・ＳＯ3、ならびに、ナトリウム、カリウム、およびリチウム等のアルカリ金属が一部固溶したカルシウムアルミネートなどが挙げられ、これらの一種または二種以上が使用可能である。これらの中では、反応活性の面でＣａＯ／Ａｌ2Ｏ3のモル比が１．２〜１．６である熱処理物を急冷したカルシウムアルミネートが好ましい。 As mineral components of calcium aluminate, C 3 A (3CaO · Al 2 O 3 ), C 12 A 7 (12CaO · 7Al 2 O 3 ), CA (CaO · Al 2 O 3 ) and CA 2 (CaO · 2Al) Examples include those obtained by pulverizing a calcium aluminate heat-treated product represented by 2 O 3 ). Furthermore, as other components, calcium aluminosilicate containing SiO 2 , C 11 A 7 · CaX 2 (X is a halogen of fluorine) in which one CaO of C 12 A 7 is replaced with a halide such as CaF 2 , SO C 4 A 3 · SO 3 containing three components and calcium aluminate in which alkali metals such as sodium, potassium and lithium are partly dissolved, and the like can be used. One or more of these can be used. . Among these, calcium aluminate obtained by quenching a heat-treated product having a CaO / Al 2 O 3 molar ratio of 1.2 to 1.6 in terms of reaction activity is preferable.
また、カルシウムアルミネートに十分な速硬性を付与させるためにガラス化率が２５％以上のものが好ましい。ここでガラス化率は次の方法で導出することができる。すなわち、セメント組成物に含まれる各鉱物の質量（ＭＳ）を粉末Ｘ線回折により内部標準法等で定量し、定量できた含有鉱物相の総和質量（ＭＣ）を算出し、残部が純ガラス相と見なし、次式でガラス化率を求める。 Moreover, in order to give calcium aluminate sufficient quick-hardness, a thing with a vitrification rate of 25% or more is preferable. Here, the vitrification rate can be derived by the following method. That is, the mass (MS) of each mineral contained in the cement composition is quantified by an internal standard method or the like by powder X-ray diffraction, and the total mass (MC) of the contained mineral phase that has been quantified is calculated, with the balance being a pure glass phase Therefore, the vitrification rate is obtained by the following formula.
（数１）
ガラス化率（％）＝（１−ＭＣ／ＭＳ）×１００
(Equation 1)
Vitrification rate (%) = (1-MC / MS) × 100
カルシウムアルミネートの使用量としては、石炭灰１００質量部に対して、１．５〜４質量部であり、好ましくは、２〜３質量部である。カルシウムアルミネートの使用量が１．５質量部未満の場合、初期凝結の効果が薄れる恐れがある。また、４質量部を超える場合、過度に凝結が進み過ぎて練り込むのが困難になる恐れがある。 As usage-amount of a calcium aluminate, it is 1.5-4 mass parts with respect to 100 mass parts of coal ash, Preferably, it is 2-3 mass parts. When the amount of calcium aluminate used is less than 1.5 parts by mass, the effect of initial setting may be reduced. Moreover, when it exceeds 4 mass parts, condensation may progress too much and there exists a possibility that it may become difficult to knead.
本発明で使用する石膏は、凝結を促進させるものであり、例えば、無水石膏、半水石膏、および二水石膏であり、これらの１種または２種以上が使用可能である。これらの中では、凝結促進の効果の面から無水石膏が好ましい。石膏の使用量は、石炭灰１００質量部に対して、１．５〜４質量部であり、好ましくは、２〜３質量部である。石膏の使用量が１．５質量部未満の場合、過度の凝結が進み過ぎて練り込むのが困難になる恐れがある。また、４質量部を超える場合、初期凝結が遅延する恐れがある。 The gypsum used in the present invention promotes the setting, and examples thereof include anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum, and one or more of these can be used. Among these, anhydrous gypsum is preferable in terms of the effect of promoting the setting. The usage-amount of gypsum is 1.5-4 mass parts with respect to 100 mass parts of coal ash, Preferably, it is 2-3 mass parts. When the amount of gypsum used is less than 1.5 parts by mass, excessive setting may progress and it may be difficult to knead. Moreover, when it exceeds 4 mass parts, there exists a possibility that an initial stage setting may be delayed.
本発明で使用する凝結調整剤は、石炭灰、ポルトランドセメント、カルシウムアルミネート、石膏から練り上げられたモルタルに対しての凝結効果を補助するものであれば何れであっても良い。例えば、石膏以外のアルカリ金属の硫酸塩、炭酸塩、炭酸水素塩、硝酸塩、亜硫酸塩および水酸化物などが挙げられる。その中でも、硫酸ナトリウム、炭酸リチウム、水酸化カルシウムなどがコスト面または効果の面から好ましい。凝結調整剤の使用量は、石炭灰１００質量部に対して、０．０５〜０．９質量部であり、好ましくは、０．１〜０．８質量部である。凝結調整剤の使用量が０．０５質量部未満の場合、効果が発現されない恐れがある。また、０．９質量部を超える場合、異常凝結により練り込むのが困難になる、あるいは強度発現が不良になる恐れがある。 The setting modifier used in the present invention may be any as long as it assists the setting effect on mortar kneaded from coal ash, Portland cement, calcium aluminate, and gypsum. For example, sulfates, carbonates, hydrogen carbonates, nitrates, sulfites and hydroxides of alkali metals other than gypsum can be used. Among these, sodium sulfate, lithium carbonate, calcium hydroxide and the like are preferable from the viewpoint of cost or effect. The usage-amount of a setting regulator is 0.05-0.9 mass part with respect to 100 mass parts of coal ash, Preferably, it is 0.1-0.8 mass part. When the usage-amount of a setting regulator is less than 0.05 mass part, there exists a possibility that an effect may not be expressed. Moreover, when it exceeds 0.9 mass part, there exists a possibility that it may become difficult to knead | mix by abnormal condensation or intensity | strength expression may become poor.
また、本発明の成型用モルタル組成物は前記成分に加えて、本発明の効果を喪失させない範囲で他の成分を含有するものであっても良い。含有可能な成分として、モルタルやコンクリートに使用できる減水剤類（高性能減水剤、高性能ＡＥ減水剤または分散剤あるいは流動化剤と称されているものも含む。）、粉塵低減剤、収縮低減剤、膨張材等を挙げることができる。好ましくは、流動性の確保より高性能減水剤を含むのが良い。使用可能な減水剤の有効成分は限定されず、アルカリアリルスルホン酸系、ナフタレンスルホン酸系、メラミンスルホン酸系またはポリカルボン酸系等の高性能減水剤が挙げられる。 In addition to the above components, the molding mortar composition of the present invention may contain other components as long as the effects of the present invention are not lost. Containable components include water reducing agents that can be used in mortar and concrete (including those called high performance water reducing agents, high performance AE water reducing agents, dispersants or fluidizing agents), dust reducing agents, shrinkage reduction. An agent, an expansion material, etc. can be mentioned. Preferably, a high-performance water reducing agent is included to ensure fluidity. The active ingredient of the water reducing agent that can be used is not limited, and examples thereof include high performance water reducing agents such as alkali allyl sulfonic acid, naphthalene sulfonic acid, melamine sulfonic acid, and polycarboxylic acid.
本発明の成型用モルタル組成物は、前記混合粉末に加水して練り上がりが可能な範囲であれば、特に水量について問題はないが、均一に練り上げること、または流動性確保のための減水剤過剰添加による凝結遅延を防止し、初期凝結遅延を防止する点から、混合粉末を１００質量部とした場合、水量２３〜３３質量部で練り上げることがより好ましい。 The molding mortar composition of the present invention has no particular problem with respect to the amount of water as long as it can be added to the mixed powder and kneaded, but it can be kneaded uniformly or with an excess of water reducing agent for ensuring fluidity. From the viewpoint of preventing the setting delay due to the addition and preventing the initial setting delay, when the mixed powder is 100 parts by mass, it is more preferable to knead with 23 to 33 parts by mass of water.
加水後、成型し、養生することにより成型物が得られる。ここで成型は、通常型枠に充填して行うのが好ましい。
本発明の成型用モルタル組成物について、練り上がり後の養生については、特に限定されない。養生条件の一例として、早期の強度発現を高める目的で、蒸気養生を行うこと出来る。蒸気養生の条件としては、高圧蒸気養生、常圧蒸気養生が挙げられるが、常圧蒸気養生が好ましい。養生条件としては、０．５〜１．５時間程度の前養生を置き、次いで６５〜８０℃で６〜１０時間の常圧養生を行うのが好ましい。
After adding water, it is molded and cured to obtain a molded product. Here, the molding is preferably carried out by filling a normal formwork.
About the molding mortar composition of this invention, it does not specifically limit about the curing after kneading. As an example of curing conditions, steam curing can be performed for the purpose of increasing early strength development. The conditions for steam curing include high-pressure steam curing and atmospheric steam curing, but atmospheric steam curing is preferable. As curing conditions, it is preferable to place precuring for about 0.5 to 1.5 hours and then perform normal pressure curing at 65 to 80 ° C. for 6 to 10 hours.
上記養生により、１日後には、人工骨材として使用可能な圧縮強度、例えば１５Ｎ／ｍｍ2以上の圧縮強度を有する成型物が得られる。得られた成型物は、必要により適度な大きさに粉砕して人工骨材として使用できる。 By the above curing, a molded product having a compressive strength that can be used as an artificial aggregate, for example, a compressive strength of 15 N / mm 2 or more is obtained after one day. The obtained molded product can be used as an artificial aggregate after being pulverized to an appropriate size if necessary.
以下、本発明を実施例によって具体的に説明する。本発明は記載された実施例に限定されるものではない。 Hereinafter, the present invention will be specifically described by way of examples. The invention is not limited to the embodiments described.
［使用材料］
石炭灰（表１）、ポルトランドセメント、カルシウムアルミネート、石膏、凝結調整剤を表２の配合割合で調合し、混合粉末（Ｐ）とした。使用材料の詳細は、以下の通りである。
・石炭灰（ＦＡ）；表１に表す（ＦＡ１〜ＦＡ３）
・ポルトランドセメント（Ｃ）；普通ポルトランドセメント（太平洋セメント社製）
・カルシウムアルミネート（ＣＡ）；Ｃａ／Ａｌ（ｍｏｌ）＝１．３、ガラス化率＝４０％
・石膏；無水石膏（ＣＳ）（市販品）
・凝結調整剤；ぼう硝（ＮＳ）（市販品）、炭酸リチウム（ＬＣ）（市販品）、水酸化カルシウム（ＣＨ）（市販品）
・高性能ＡＥ減水剤；ポリカルボン酸系高性能減水剤（液体） 固形分濃度３０％
[Materials used]
Coal ash (Table 1), Portland cement, calcium aluminate, gypsum, and a coagulation adjusting agent were blended at the blending ratios shown in Table 2 to obtain mixed powder (P). Details of the materials used are as follows.
-Coal ash (FA); represented in Table 1 (FA1-FA3)
・ Portland cement (C); ordinary Portland cement (manufactured by Taiheiyo Cement)
Calcium aluminate (CA); Ca / Al (mol) = 1.3, vitrification rate = 40%
・ Gypsum; anhydrous gypsum (CS) (commercially available)
・ Coagulation adjuster: Boro-nitrate (NS) (commercial product), lithium carbonate (LC) (commercial product), calcium hydroxide (CH) (commercial product)
・ High-performance AE water reducing agent; polycarboxylic acid-based high-performance water reducing agent (liquid) Solid content concentration 30%
２０℃環境下で、表２で調合した混合粉末（Ｐ）１００質量部に対して、水２１〜３５質量部を加えてホバートミキサにて混合してモルタルを作製した。また、このときフレッシュ性状の調整を行うために混合粉末１００質量部に対してポリカルボン酸系高性能減水剤０〜０．０５質量部を水に溶解させ用いた。 Under a 20 ° C. environment, 21 to 35 parts by mass of water was added to 100 parts by mass of the mixed powder (P) prepared in Table 2 and mixed with a Hobart mixer to prepare a mortar. At this time, in order to adjust the fresh properties, 0 to 0.05 parts by mass of a polycarboxylic acid-based high-performance water reducing agent was dissolved in water with respect to 100 parts by mass of the mixed powder.
［成型保持性の評価］
作製したモルタルをＪＩＳ Ｒ ５２０１フロー試験に準じて評価を行った。但し、フローコーンは直ちに取り去るのではなく、１５分ならびに６０分後取り去ることとした。この時の１５秒間での１５回落下運動前後のフロー変動率を成型保持性として評価した。なお、評価は、全て２０℃環境下において行った。この結果を表３に示す。
[Evaluation of mold retention]
The produced mortar was evaluated according to the JIS R 5201 flow test. However, the flow cone was not removed immediately, but was removed after 15 and 60 minutes. The flow fluctuation rate before and after the 15th dropping motion in 15 seconds at this time was evaluated as the mold holding property. All evaluations were performed in a 20 ° C. environment. The results are shown in Table 3.
（数２）
フロー変動率（成型保持性）（％）＝（１５打フロー後フロー値）／（１５打フロー前フロー値）×１００
(Equation 2)
Flow fluctuation rate (mold retention) (%) = (flow value after 15 strokes flow) / (flow value before 15 strokes flow) × 100
［凝結性状の評価］
作製したモルタルについて断面積０．１２５ｃｍ2のプロクター針を使用して、プロクター貫入抵抗値を測定することで凝結性状の評価を行った。２０℃環境下において、０ｍｉｎ（モルタル作製直後）、１５ｍｉｎ、６０ｍｉｎ後のプロクター貫入抵抗値を測定した。この測定結果を表３に示す。
[Evaluation of condensation properties]
About the produced mortar, using a Proctor needle with a cross-sectional area of 0.125 cm 2 , the setting property was evaluated by measuring the Procter penetration resistance value. In a 20 ° C. environment, Procter penetration resistance values were measured after 0 min (immediately after mortar preparation), 15 min, and 60 min. The measurement results are shown in Table 3.
［強度発現性の評価］
作製したモルタルを直ちに、内寸５０×１００ｍｍの円筒型枠に充填し、前置きを１時間置いて昇温速度２０℃／ｈで７０℃まで昇温し当該温度で８時間保持して蒸気養生を行い、材齢１日のモルタル硬化成型体を得た。この成型体の２０℃での一軸圧縮強度を測定した。結果を表３に示す。
[Evaluation of strength development]
Immediately fill the prepared mortar into a cylindrical frame with an internal size of 50 × 100 mm, put the front for 1 hour, raise the temperature to 70 ° C. at a heating rate of 20 ° C./h, and hold at that temperature for 8 hours for steam curing. This was done to obtain a 1 day old mortar cured molded body. The uniaxial compressive strength at 20 ° C. of this molded body was measured. The results are shown in Table 3.
表３で示すように、本発明の成型用モルタル組成物は、練り上がり直後からの硬化までの凝結性が良好であり、フロー変動率から耐衝撃性、耐振動性に対して強いものと考えられる。また、プロクター貫入抵抗値より初期の強度発現性が良好であることがわかる。これに対して、本発明の範囲外のモルタルは、フロー変動率が大きく、耐衝撃性、耐振動性に対して弱く、強度発現の伸びも小さかったり（例えばＮｏ．１−１１，１−１２，１−１５，１−１６，１−１８）、モルタル作製の際、練り上げることが困難となった（例えば、Ｎｏ．１−１０，１−１３，１−１４）さらに、表３の結果から、本発明のモルタルについて蒸気養生を行ったところ、良好な強度発現性を示し、強度低下が見られなかったことから、養生条件として蒸気養生を用いることができることがわかる。また、本発明のモルタルは、石炭灰の組成の相違に影響されず、同様の硬化性を示した。 As shown in Table 3, the molding mortar composition of the present invention has good coagulation properties from immediately after kneading to curing and is considered strong against impact resistance and vibration resistance from the flow fluctuation rate. It is done. It can also be seen that the initial strength development is better than the Procter penetration resistance value. In contrast, mortars outside the scope of the present invention have a large flow fluctuation rate, are weak against impact resistance and vibration resistance, and have a small elongation of strength (for example, Nos. 1-11 and 1-12). , 1-15, 1-16, 1-18), it became difficult to knead in the preparation of mortar (for example, No. 1-10, 1-13, 1-14) Further, from the results of Table 3 When steam curing was performed on the mortar of the present invention, good strength development was exhibited and no reduction in strength was observed, indicating that steam curing can be used as curing conditions. Moreover, the mortar of this invention was not influenced by the difference in the composition of coal ash, and showed the same curability.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013261935A JP6258692B2 (en) | 2013-12-19 | 2013-12-19 | Molding mortar composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013261935A JP6258692B2 (en) | 2013-12-19 | 2013-12-19 | Molding mortar composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015117161A JP2015117161A (en) | 2015-06-25 |
| JP6258692B2 true JP6258692B2 (en) | 2018-01-10 |
Family
ID=53530234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013261935A Active JP6258692B2 (en) | 2013-12-19 | 2013-12-19 | Molding mortar composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6258692B2 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2843520B2 (en) * | 1995-01-19 | 1999-01-06 | 日本碍子株式会社 | Method for producing coal ash solidified material |
| JPH11292587A (en) * | 1998-04-16 | 1999-10-26 | Sumitomo Metal Mining Co Ltd | Production of artificial lightweight aggregate, and artificial lightweight aggregate obtained by the method |
| JP2001322847A (en) * | 2000-05-12 | 2001-11-20 | Sumitomo Metal Mining Co Ltd | Production process of high-strength steam-curing aggregate, using coal ash |
| JP2004148709A (en) * | 2002-10-31 | 2004-05-27 | Taiheiyo Cement Corp | Method of molding and solidifying granular powder and molding system |
| JP5072541B2 (en) * | 2006-12-26 | 2012-11-14 | 太平洋マテリアル株式会社 | Admixture for cement composition with high coal ash powder content, and cement composition and spray material with high coal ash powder content containing the same |
| JP6077778B2 (en) * | 2011-12-07 | 2017-02-08 | 太平洋マテリアル株式会社 | Earthwork materials |
-
2013
- 2013-12-19 JP JP2013261935A patent/JP6258692B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015117161A (en) | 2015-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5784002B2 (en) | Cement composition for repair, cement mortar material for repair using the same, and cement mortar for repair | |
| JP2011136885A (en) | Quick-hardening material for low temperature and cement-containing material containing the same | |
| JP2017145173A (en) | Quick-hardening cement admixture and quick-hardening cement composition | |
| JP6718551B1 (en) | Powder quick-setting agent | |
| JP2009132808A (en) | Grouting material and regulation method of curing time | |
| JP4616112B2 (en) | Cement quick setting material and cement composition | |
| JP6408454B2 (en) | Geopolymer composition and method for producing the same | |
| JP2013095624A (en) | Quick-hardening agent and quick-hardening cement composition | |
| JP2015171974A (en) | cement composition | |
| JP2020164413A (en) | Fast curing admixture | |
| JP2015044717A (en) | Method for preparing portland cement for steam-cured product | |
| JP6258692B2 (en) | Molding mortar composition | |
| JP6026799B2 (en) | Cement composition and cement mortar using the same | |
| JP6783118B2 (en) | Cement composition and its manufacturing method | |
| JP4616111B2 (en) | Quick setting material for cement and quick hardening cement composition | |
| JP2015124140A (en) | Fast curing accelerator | |
| JPH0149657B2 (en) | ||
| JP5846494B2 (en) | Cement composition and concrete composition | |
| JP2017132646A (en) | Quality control method of hauyne and belite-containing clinker, hauyne and belite-containing clinker, and quickly curable cement | |
| JP6595906B2 (en) | Quick-hardening fiber grout composition | |
| JP3950641B2 (en) | Method for producing quick setting agent for rapid hardening cement and method for producing rapid hardening cement composition | |
| JP2014185040A (en) | Cement composition | |
| JP2006062888A (en) | Quick-hardening admixture and quick-hardening cement composition | |
| JP2018172252A (en) | Admixture for cement, cement composition, and hydraulic composition | |
| JP2018177599A (en) | Cement mortal/concrete composition and production method therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20161031 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20170830 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20170912 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20171106 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20171205 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20171207 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6258692 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |