JP2009155191A - Lightweight premixed mortar - Google Patents

Lightweight premixed mortar Download PDF

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JP2009155191A
JP2009155191A JP2007338666A JP2007338666A JP2009155191A JP 2009155191 A JP2009155191 A JP 2009155191A JP 2007338666 A JP2007338666 A JP 2007338666A JP 2007338666 A JP2007338666 A JP 2007338666A JP 2009155191 A JP2009155191 A JP 2009155191A
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lightweight
mortar
aggregate
water
cement
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Yutaka Nakajima
裕 中島
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Taiheiyo Materials Corp
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Taiheiyo Materials Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide lightweight mortar which suppresses the change in flowability with time until setting starts even after pouring water and kneading, in cement-based lightweight mortar using lightweight aggregate and super lightweight aggregate as fine aggregate, and which, for example, can develop flowability having no trouble on filling operation, irrespective of the elapsed time from the pouring-water and kneading, irrespective of the presence of a thickening component, and without affecting the curability. <P>SOLUTION: The lightweight premixed mortar includes cement and lightweight fine aggregate having a speed of water absorption per unit volume one minute after pouring water from an absolute dry condition of 500-900 kg/min. The lightweight premixed mortar preferably includes lightweight fine aggregate having a weight per unit volume of 0.5 kg/l or less. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、軽量骨材を用いて軽量化した軽量プレミックスモルタルに関する。   The present invention relates to a lightweight premix mortar reduced in weight using a lightweight aggregate.

建築や土木工事で充填材、裏込材又はグラウト材等として充填施工されるセメント系モルタルは、施工箇所の隅々まで斑無く行き渡るよう比較的高い流動性が必要なるため、概して混練水の使用量が多いものとなっている。このため当該モルタルを打設高さが長い施工箇所に打設すると、モルタルが自重で沈下し易く、その結果、打設体下部に膨れが生じ、変形した施工物になるという問題があった。(例えば、特許文献1参照。)モルタルに用いる細骨材を軽量骨材にし、モルタルの単位容積質量を小さくすれば、自重の影響を軽減でき、打設体下部の膨れを抑制できる可能性がある。一方で、セメント系モルタルの流動性は注水混練後から施工までの経過時間によって変化するが、混練終了後およそ20〜30分間は実用上概ね支障の無い比較的軽微な変化である。しかし、軽量骨材を大量に含むモルタルや容重が著しく低い超軽量骨材を含むモルタルでは、概して流動性の経時変化が増大するといった現象が見られた。また、軽量又は超軽量細骨材使用の軽量モルタルでは、配合材料間の比重差が広がり易く、特に材料分離を防ぐため増粘成分を加えると、流動性の経時変化がより大きくなり、充填性に著しい支障が出るほどの流動性低下を起こすことがある。このように流動性の経時変化が大きくなると、施工性や硬化性状も明らかに変化し、安定した品質の軽量モルタル施工物を得ることが容易ではなくなる。

特開平8−109053号公報
Cement-based mortar that is filled and used as a filler, backing material, or grout material in construction and civil engineering works requires relatively high fluidity so that it can reach all corners of the construction site, so kneaded water is generally used. The amount is large. For this reason, when the mortar is placed in a construction site where the placement height is long, the mortar easily sinks due to its own weight, and as a result, there is a problem that the bottom of the placement body is swollen and a deformed construction is obtained. (For example, refer to Patent Document 1) If the fine aggregate used in the mortar is made of a lightweight aggregate and the unit volume mass of the mortar is reduced, the influence of its own weight can be reduced and the possibility of suppressing the swelling of the lower portion of the placement body may be reduced. is there. On the other hand, the fluidity of the cement-based mortar changes depending on the elapsed time from after the water injection kneading to the construction, but after the completion of the kneading, it is a relatively slight change that has no practical problem. However, in mortars containing a large amount of lightweight aggregates and mortars containing ultra-lightweight aggregates having a remarkably low weight, a phenomenon in which the change in fluidity with time was generally observed was observed. Also, in lightweight mortars using lightweight or ultralight fine aggregates, the difference in specific gravity between compounded materials tends to widen, especially when a thickening component is added to prevent material separation, the change in fluidity with time becomes greater, and the filling properties May cause a decrease in fluidity that may cause a significant hindrance. Thus, when the change in fluidity with time increases, the workability and the hardenability change clearly, and it becomes difficult to obtain a lightweight mortar construction product with stable quality.

JP-A-8-109053

本発明は、軽量骨材や超軽量骨材を細骨材に使用する軽量モルタルに於いて、注水混練後も凝結始発前までは、流動性の経時変化を抑制し、例えば充填施工上支障の無い流動性を、注水混練時からの時間経過に拘わらず、また増粘成分の含有如何に拘わらず、安定して発現できる軽量モルタルの提供を課題とする。   The present invention is a lightweight mortar that uses a lightweight aggregate or an ultralight aggregate for a fine aggregate. It is an object of the present invention to provide a lightweight mortar that can stably exhibit a fluidity that does not flow regardless of the passage of time from the time of water pouring kneading and the presence of a thickening component.

本発明者は、検討を重ねた結果、軽量骨材や超軽量骨材は高気孔率にすることで軽量化が達せられているものが殆どであり、例えばガラスバルーン等の閉口空隙しか空隙を有さない軽量骨材を除き、その多くは開口気孔を有すため一般に高い吸水率を示すことから、吸水率が高い軽量骨材をセメント系モルタルの細骨材に使用すると、注水後のモルタル中の細骨材が、混練終了後も暫くの間、モルタル中の混練水を吸収し続けるため、軽量モルタルの流動性の経時変化が大きくなるという知見を得、かかる流動性の経時変化を抑制するために、特定の吸水速度の軽量又は超軽量骨材を細骨材に用い、この乾式混合物である軽量プレミックスモルタルは、注水混練直後から流動性の経時低下が少なく、安定した施工性と硬化性状を呈したことから本発明を完成するに至った。   As a result of repeated studies, the present inventors have found that lightweight aggregates and ultralight aggregates are mostly reduced in weight by increasing the porosity, and for example, only closed gaps such as glass balloons have voids. Except for lightweight aggregates, many of them have open pores and generally show high water absorption.Therefore, when lightweight aggregates with high water absorption are used for cement-based mortar fine aggregates, mortar after water injection is used. Since the fine aggregate inside continues to absorb the kneading water in the mortar for a while after the completion of the kneading, we obtained the knowledge that the change in the flowability of the lightweight mortar increases over time, and suppresses this change in flowability over time. Therefore, lightweight or ultralight aggregate with a specific water absorption speed is used for the fine aggregate, and the lightweight premix mortar, which is a dry-type mixture, has little deterioration in fluidity over time immediately after the water injection and kneading, and stable workability. Has it exhibited curable properties? This has led to the completion of the present invention.

即ち、本発明は、セメントと絶乾状態から注水後1分間の単位体積あたりの吸水速度が500〜900kg/分の軽量細骨材を含有してなる軽量プレミックスモルタルである。また、本発明は、軽量細骨材が容重0.5kg/リットル以下の軽量細骨材である前記の軽量プレミックスモルタルである。また本発明は、さらに増粘成分を含有する前記何れかの軽量プレミックスモルタルである。   That is, the present invention is a lightweight premixed mortar containing a lightweight fine aggregate having a water absorption rate per unit volume of 500 to 900 kg / min. Moreover, this invention is the said lightweight premix mortar whose lightweight fine aggregate is a lightweight fine aggregate with a capacity of 0.5 kg / liter or less. In addition, the present invention is any one of the light premix mortars further containing a thickening component.

本発明によれば、注水混練後の経過時間の差による流動性の変化を低減でき、充填施工に支障が生じるほどの流動性低下が見られないので、注水から施工開始までの経過時間によらず概ね安定した施工性の軽量モルタルが得られると共に品質性状の変化も殆ど起こらない軽量モルタル施工物が得られる。   According to the present invention, the change in fluidity due to the difference in elapsed time after pouring water can be reduced, and there is no fluidity drop to the extent that filling work is hindered. Thus, a light weight mortar having a substantially stable workability is obtained, and a light weight mortar construction that hardly changes in quality properties is obtained.

本発明の軽量プレミックスモルタルは、軽量化のために軽量細骨材(又は超軽量細骨材)を用いて軽量化し、セメントや必要に応じて加えられる他の混和成分と共に乾式混合したものである。使用する軽量細骨材は、絶乾状態から注水後1分間の単位体積(m3)あたりの吸水速度が500〜900kg/分であることが必須であり、かかる条件を充当するものとして吸水サイトとしての開口気孔を有する構造である必要がある。従って、例えばガラスバルーン等の如く閉口した空隙しか有さない軽量骨材は適さない。使用する軽量細骨材の気孔率は制限されないが、前記の如く開口気孔率が0%かそれに限りなく近いものは適さない。好ましくは開口気孔率がおよそ40〜92%のものが適当である。開口気孔率がこの範囲から外れると所望の吸水速度を確保し難くなる可能性がある。尚、本発明で規定する吸水速度は、次のような方法によって定義(測定)されるものである。絶乾状態に保った軽量骨材と当容積の水を常温近傍で1分間混合し、混合終了直後の軽量骨材と水からなる混合物の容積を測定し、単位時間(1分間)あたりの容積減少量を算出して吸水速度とした。また、使用する軽量細骨材の粒子径は、最大粒子径で3mm以下のものが好ましい。最大粒子径が3mmを超えるとプレミックスモルタル中で軽量細骨材が材料分離を起こすことがあるので適当ではない。本発明の軽量プレミックスモルタルは、特に、軽量細骨材として容重が0.5kg/リットル以下のものを使用する場合が好適であり、このような骨材は概して高気孔率であることが多く、その場合より高い吸水率を有する可能性があるが、前記のような吸水速度のものを使用することによって、モルタル中の混練水量の経時変化に起因する流動性の変化を十分低減することができる。 The lightweight premixed mortar of the present invention is a lightweight premixed mortar (or ultralightweight fine aggregate) that is lightly mixed and dry-mixed with cement and other admixing ingredients added as necessary. is there. The lightweight fine aggregate to be used must have a water absorption rate of 500 to 900 kg / min per unit volume (m 3 ) for 1 minute after pouring from an absolutely dry state. It is necessary to have a structure having open pores. Therefore, for example, a lightweight aggregate having only a closed gap such as a glass balloon is not suitable. The porosity of the lightweight fine aggregate to be used is not limited, but those having an open porosity of 0% or as close as possible are not suitable as described above. Preferably, the open porosity is about 40 to 92%. If the open porosity is out of this range, it may be difficult to secure a desired water absorption rate. The water absorption speed defined in the present invention is defined (measured) by the following method. Lightweight aggregate kept in an absolutely dry state and this volume of water are mixed at room temperature for 1 minute, the volume of the mixture consisting of light aggregate and water immediately after mixing is measured, and the volume per unit time (1 minute) The amount of decrease was calculated as the water absorption rate. The light-weight fine aggregate used preferably has a maximum particle size of 3 mm or less. If the maximum particle size exceeds 3 mm, the light fine aggregate may cause material separation in the premix mortar, which is not appropriate. The lightweight premixed mortar of the present invention is particularly suitable when a lightweight fine aggregate having a weight of 0.5 kg / liter or less is used, and such aggregate generally has a high porosity. In this case, there is a possibility that the water absorption rate is higher, but by using the water absorption rate as described above, it is possible to sufficiently reduce the change in fluidity caused by the change in the amount of kneaded water in the mortar over time. it can.

本発明の軽量予混合モルタルは、結合相形成成分としてセメントを含有する。セメントは水硬性のセメントなら特に限定されず、例えば、普通、早強、超早強、中庸熱、低熱等のポルトランドセメント、高炉セメントやフライアッシュセメント等の各種混合セメント、白色セメント、アルミナセメント又はエコセメント等の特殊セメントが挙げられる。また、任意の2種以上のセメントを併用しても良い。セメントの粉末度や粒子径は特に制限されるものではない。本プレミックスモルタル中のセメントの含有量は、好ましくは60〜95質量%とする。60質量%未満では結合成分が不足し、強度が低下するので適当ではない。95質量%を超えると、注水後の施工物の乾燥収縮が大きくなり、亀裂が生じることがあるので適当ではない。   The lightweight premixed mortar of the present invention contains cement as a binder phase forming component. The cement is not particularly limited as long as it is a hydraulic cement, for example, normal, early strength, ultra-early strength, moderate heat, low heat, etc. Portland cement, various mixed cements such as blast furnace cement and fly ash cement, white cement, alumina cement or Special cements such as eco-cement can be mentioned. Moreover, you may use arbitrary 2 or more types of cement together. The fineness and particle size of the cement are not particularly limited. The content of cement in the premix mortar is preferably 60 to 95% by mass. If the amount is less than 60% by mass, the bonding component is insufficient and the strength is lowered, which is not suitable. When it exceeds 95% by mass, the drying shrinkage of the construction after water injection becomes large and cracks may occur, which is not appropriate.

本発明の軽量プレミックスモルタルは、前記軽量細骨材とセメントに加えて、さらに増粘成分を含有するものが好適である。増粘成分は、モルタルやコンクリートに使用できるものであれば特に限定されない。例えば、セルロース系、多糖類系、アクリル酸系、ラテックス系、グリコール系、メラミンスルホン酸塩のホルムアルデヒド高縮合物などの増粘成分を挙げることができる。増粘成分を含むものでは、材料分離抵抗が強化される。反面、一般には粘性が増大し、これに伴って流動性が低下する。特に、含水量が経時低下するような組成系では流動性低下が激しく、施工で支障をきたすこともあるが、本発明のモルタルは、増粘成分が配合されても施工性低下に繋がるような流動性の低下を抑制することができる。増粘成分の配合量は材料分離抵抗が付与できる程度で良いが、粘性過大となって混練が困難にならない量であれば特に制限されない。   The lightweight premixed mortar of the present invention preferably contains a thickening component in addition to the lightweight fine aggregate and cement. The thickening component is not particularly limited as long as it can be used for mortar and concrete. Examples thereof include thickening components such as cellulose-based, polysaccharide-based, acrylic acid-based, latex-based, glycol-based, and melamine sulfonate formaldehyde highly condensed products. In the case of containing a thickening component, the material separation resistance is enhanced. On the other hand, in general, the viscosity increases and the fluidity decreases accordingly. In particular, in a composition system in which the water content decreases with time, the fluidity is drastically reduced and may cause trouble in construction, but the mortar of the present invention may lead to a decrease in workability even if a thickening component is blended. A decrease in fluidity can be suppressed. The blending amount of the thickening component may be such that material separation resistance can be imparted, but is not particularly limited as long as the viscosity is excessive and kneading is not difficult.

また、本発明の軽量プレミックスモルタルは、本発明の効果を実質喪失させない範囲で、前記以外にも他の成分を含むものであっても良い。このような成分として、何れもモルタルやコンクリートに使用できる、分散剤(減水剤、高性能減水剤、高性能AE減水剤、AE減水剤又は流動化剤と称するものも含む。)、膨張材、収縮低減剤、気泡剤、空気連行剤、消泡剤、凝結促進剤、凝結遅延剤、保水剤、ポゾラン反応性物質、繊維、ポリマーディスパージョン、再乳化粉末樹脂、抗菌剤、顔料等を例示することができる。また、乾式混合時の混合性を鑑み、このような成分はできるだけ粉末や粒状のものを使用するのが望ましい。   Moreover, the lightweight premix mortar of this invention may contain another component other than the above in the range which does not lose the effect of this invention substantially. As such components, any of them can be used for mortar and concrete, including dispersants (including water-reducing agents, high-performance water-reducing agents, high-performance AE water-reducing agents, AE water-reducing agents or fluidizing agents), expansion materials, Examples include shrinkage reducing agents, foaming agents, air entraining agents, antifoaming agents, setting accelerators, setting retarders, water retention agents, pozzolanic reactive substances, fibers, polymer dispersions, re-emulsified powder resins, antibacterial agents, pigments, etc. be able to. Moreover, in view of the mixing properties during dry mixing, it is desirable to use such components as powders or granules as much as possible.

また、本発明の軽量プレミックスモルタルは、前記の軽量細骨材とセメント、またはこれらに他の混和成分を加えたものを、任意の順序又は一括で、例えばリボンミキサー、ヘンシェルミキサー、レーディゲミキサー、傾胴式ミキサー等の混合機に投入し、乾式混合すれば得られる。操作条件等は適宜定めれば良く、特に制限されるものではない。また、ここに例示した以外の製造方法でも良い。本発明の軽量プレミックスモルタルは、製造後、容器や袋等で保管可能であり、保管後は例えばモルタルミキサー等の混練機に投入し、水を加えて混練すれば、打設使用可能なフレッシュモルタルを容易に得ることができる。また、本発明の軽量プレミックスモルタルは、注水時にモルタルやコンクリートに使用できるような混和剤・材を適宜加え、フレッシュモルタルを作製しても良い。   Further, the lightweight premix mortar of the present invention is obtained by adding the above-mentioned lightweight fine aggregate and cement, or those obtained by adding other admixture components to them in any order or in a lump, for example, a ribbon mixer, a Henschel mixer, a radige. It can be obtained by putting it in a mixer such as a mixer or a tilted barrel mixer and dry-mixing it. Operation conditions and the like may be determined as appropriate and are not particularly limited. Further, a manufacturing method other than those exemplified here may be used. The lightweight premixed mortar of the present invention can be stored in a container or bag after production, and after storage, it can be placed in a kneader such as a mortar mixer and added to water to knead it. Mortar can be easily obtained. In addition, the lightweight premix mortar of the present invention may be prepared as a fresh mortar by appropriately adding an admixture / material that can be used for mortar or concrete during water injection.

以下、実施例により本発明を具体的に詳しく説明するが、本発明は以下に表す実施例に限定されるものではない。   EXAMPLES Hereinafter, although an Example demonstrates this invention concretely in detail, this invention is not limited to the Example represented below.

次に表す軽量骨材(A1〜A5)、セメント(B)、分散剤(C)、増粘剤(D)、凝結遅延剤(E)から選定される材料を表1に表した配合量となるよう1バッチ当たり約33kgの合計量にして内容積100リットルのレーディゲミキサ(レーディゲ社製)に一括投入した。投入した材料は、温度約20℃、湿度約60%の屋内環境下で1分間乾式混合した。尚、軽量骨材の吸水速度は、105℃の乾燥機中で絶乾状態にせしめた骨材を嵩容積で1リットルとなるよう常温下で所定の混合容器に入れ、これに水1リットルを加え、ハンドミキサで回転速度1200rpmにて1分弱の間混合したときの、混合直前と直後(時間差で1分)における容器中の(水+骨材)の容積をそれぞれ測定し、その値を基に算出した。さらに、各軽量骨材を実体顕微鏡で観察した結果、A1〜A4の骨材は全て表面に開口気孔を有し、且つ多孔性であることを確認した。一方、A5の骨材は開口気孔が殆ど確認されなかった。また、使用した軽量骨材の含水率は何れも乾式混合に使用した各骨材の含水率であり、同様の骨材を105℃乾燥処理した時の重量減少率より算出した。   Table 1 shows the amount of materials selected from the following lightweight aggregates (A1 to A5), cement (B), dispersant (C), thickener (D), and setting retarder (E) The total amount was about 33 kg per batch so as to be batch-fed into a Redige mixer (made by Redige) having an internal volume of 100 liters. The input material was dry mixed for 1 minute in an indoor environment at a temperature of about 20 ° C. and a humidity of about 60%. The light-absorbing speed of the lightweight aggregate is as follows. Aggregate that has been completely dried in a dryer at 105 ° C. is placed in a predetermined mixing container at room temperature so that the bulk volume is 1 liter, and 1 liter of water is added to this. In addition, when mixing with a hand mixer at a rotational speed of 1200 rpm for less than 1 minute, measure the volume of (water + aggregate) in the container immediately before and immediately after mixing (1 minute in time difference), and calculate the value. Based on the calculation. Furthermore, as a result of observing each lightweight aggregate with a stereomicroscope, it was confirmed that the aggregates of A1 to A4 all have open pores on the surface and are porous. On the other hand, almost no open pores were confirmed in the aggregate of A5. The moisture content of the light-weight aggregate used was the moisture content of each aggregate used for dry mixing, and was calculated from the weight reduction rate when the same aggregate was dried at 105 ° C.

A1;真珠岩系多孔質人工軽量骨材(容重;0.2kg/L、吸水速度;710kg/分、最大粒径0.6mm、含水率;0.7質量%)
A2;真珠岩系多孔質人工軽量骨材(容重;0.2kg/L、吸水速度;630kg/分、最大粒径1mm、含水率;0.7質量%)
A3;真珠岩系多孔質人工軽量骨材(容重;0.2kg/L、吸水速度;550kg/分、最大粒径3mm、含水率;0.5質量%)
A4;真珠岩系多孔質人工軽量骨材(容重;0.2kg/L、吸水速度;450kg/分、最大粒径3mm、含水率;0.6%)
A5;真珠岩系発泡状中空質人工軽量骨材(容重0.2kg/L、吸水速度300kg/分、最大粒径3mm、含水率;<0.1質量%)
B;普通ポルトランドセメント(太平洋セメント社製)
C;セルロース系増粘剤(商品名「メトローズ」、信越化学工業社製)
D;ポリカルボン酸系高性能減水剤(商品名「太平洋コアフロー」、太平洋マテリアル社製)
E;クエン酸(市販試薬)
A1: Pearlite-based porous artificial lightweight aggregate (volume: 0.2 kg / L, water absorption rate: 710 kg / min, maximum particle size 0.6 mm, moisture content: 0.7 mass%)
A2: Pearlite-based porous artificial lightweight aggregate (weight: 0.2 kg / L, water absorption rate: 630 kg / min, maximum particle size 1 mm, moisture content: 0.7 mass%)
A3: Pearlite-based porous artificial lightweight aggregate (volume: 0.2 kg / L, water absorption rate: 550 kg / min, maximum particle size 3 mm, moisture content: 0.5 mass%)
A4: Pearlite-based porous artificial lightweight aggregate (weight: 0.2 kg / L, water absorption rate: 450 kg / min, maximum particle size 3 mm, moisture content: 0.6%)
A5: Pearlite-based foamed hollow artificial lightweight aggregate (weight 0.2 kg / L, water absorption rate 300 kg / min, maximum particle size 3 mm, moisture content; <0.1% by mass)
B: Ordinary Portland cement (manufactured by Taiheiyo Cement)
C: Cellulosic thickener (trade name “Metroze”, manufactured by Shin-Etsu Chemical Co., Ltd.)
D: Polycarboxylic acid-based high-performance water reducing agent (trade name “Pacific Core Flow”, manufactured by Taiheiyo Materials Co., Ltd.)
E; Citric acid (commercially available reagent)

Figure 2009155191
Figure 2009155191

乾式混合後は、直ちにミキサ内の混合物を上表面付近から3kg採取し、3kgの採取物に水1.8を加えハンドミキサーで1分間回転速度1200rpmにて混練を行った。土木学会基準JSCE−F541「充填モルタルの流動性試験方法」に従い、混練終了直後と混練終了から15分経過後の混練物に対し、J14ロートの流下時間を測定し、流動性の経時変化を調べた。この結果を表2に表す。また、混練物を常温に保たれた屋内に静置し、凝結の終結時間をJIS R 5201「セメントの物理試験方法」に準拠した方法で調べた。但し、24時間を超えても未だ凝結が終結していなかったものは「>24」の表記で表2に記した。   Immediately after dry mixing, 3 kg of the mixture in the mixer was sampled from the vicinity of the upper surface, and 1.8 kg of water was added to the 3 kg sample and kneaded with a hand mixer at a rotational speed of 1200 rpm for 1 minute. In accordance with Japan Society of Civil Engineers standard JSCE-F541 "Filling mortar fluidity test method", the flow time of the J14 funnel was measured for the kneaded material immediately after the kneading and 15 minutes after the kneading, and the change in fluidity with time was examined. It was. The results are shown in Table 2. Further, the kneaded product was allowed to stand indoors at room temperature, and the setting completion time was examined by a method in accordance with JIS R 5201 “Physical Test Method for Cement”. However, those in which the condensation was not finished even after 24 hours were shown in Table 2 with the notation of “> 24”.

Figure 2009155191
Figure 2009155191

表2の結果より、本発明の軽量プレミックスモルタルは、本発明外の比較品に比べ、流動性の経時変化、とりわけ流動性の低下が抑制されていることがわかる。また、参考品13は流動性は施工に適した値となったが、凝結の終結時間が本発明品よりも大きく遅れ、凝結硬化性に支障が現れた。   From the results shown in Table 2, it can be seen that the light-weight premixed mortar of the present invention suppresses the change in fluidity with time, particularly the decrease in fluidity, as compared with a comparative product other than the present invention. Moreover, although the fluidity of the reference product 13 was a value suitable for construction, the completion time of the setting was greatly delayed as compared with the product of the present invention, and the setting curability was hindered.

Claims (3)

セメントと絶乾状態から注水後1分間の単位体積あたりの吸水速度が500〜900kg/分の軽量細骨材を含有してなる軽量プレミックスモルタル。 A lightweight premixed mortar containing a lightweight fine aggregate having a water absorption rate per unit volume of 500 to 900 kg / min. 軽量細骨材が容重0.5kg/リットル以下の軽量細骨材である請求項1記載の軽量プレミックスモルタル。 The lightweight premixed mortar according to claim 1, wherein the lightweight fine aggregate is a lightweight fine aggregate having a weight of 0.5 kg / liter or less. さらに増粘成分を含有する請求項1又は2記載の軽量プレミックスモルタル。 Furthermore, the lightweight premix mortar of Claim 1 or 2 containing a thickening component.
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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04193783A (en) * 1990-11-26 1992-07-13 Mitsubishi Materials Corp Production of lightweight hardened body
JPH0769753A (en) * 1993-09-06 1995-03-14 Suchiraito Kogyo Kk Mortar material for open floor and mortar plate for open floor
JP2005194168A (en) * 2003-12-11 2005-07-21 Taiheiyo Material Kk Cement admixture
JP2006306655A (en) * 2005-04-28 2006-11-09 Taiheiyo Material Kk Method for suppressing deterioration of mortar or concrete
JP2007176740A (en) * 2005-12-28 2007-07-12 Taiheiyo Material Kk Thickening mortar
JP2007246293A (en) * 2006-03-13 2007-09-27 Nippon Mesaraito Kogyo Kk Low shrinkage type light-weight concrete
JP2007320783A (en) * 2006-05-30 2007-12-13 Taiheiyo Material Kk Thick applying mortar
JP2008297140A (en) * 2007-05-30 2008-12-11 Taiheiyo Material Kk High fluidity lightweight mortar
JP2009096657A (en) * 2007-10-16 2009-05-07 Taiheiyo Material Kk Cement mortar for plaster work
JP2009132568A (en) * 2007-11-30 2009-06-18 Taiheiyo Material Kk Lightweight premix mortar

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04193783A (en) * 1990-11-26 1992-07-13 Mitsubishi Materials Corp Production of lightweight hardened body
JPH0769753A (en) * 1993-09-06 1995-03-14 Suchiraito Kogyo Kk Mortar material for open floor and mortar plate for open floor
JP2005194168A (en) * 2003-12-11 2005-07-21 Taiheiyo Material Kk Cement admixture
JP2006306655A (en) * 2005-04-28 2006-11-09 Taiheiyo Material Kk Method for suppressing deterioration of mortar or concrete
JP2007176740A (en) * 2005-12-28 2007-07-12 Taiheiyo Material Kk Thickening mortar
JP2007246293A (en) * 2006-03-13 2007-09-27 Nippon Mesaraito Kogyo Kk Low shrinkage type light-weight concrete
JP2007320783A (en) * 2006-05-30 2007-12-13 Taiheiyo Material Kk Thick applying mortar
JP2008297140A (en) * 2007-05-30 2008-12-11 Taiheiyo Material Kk High fluidity lightweight mortar
JP2009096657A (en) * 2007-10-16 2009-05-07 Taiheiyo Material Kk Cement mortar for plaster work
JP2009132568A (en) * 2007-11-30 2009-06-18 Taiheiyo Material Kk Lightweight premix mortar

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