JPH11180750A - Lining concrete - Google Patents
Lining concreteInfo
- Publication number
- JPH11180750A JPH11180750A JP36576397A JP36576397A JPH11180750A JP H11180750 A JPH11180750 A JP H11180750A JP 36576397 A JP36576397 A JP 36576397A JP 36576397 A JP36576397 A JP 36576397A JP H11180750 A JPH11180750 A JP H11180750A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- lining
- setting agent
- quick
- cao
- 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
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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00577—Coating or impregnation materials applied by spraying
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、都市ゴミ焼却灰や
下水汚泥焼却灰等の廃棄物を原料として製造してなる水
硬性組成物（以下、エコセメントという）を使用して、
トンネルまたは地下空洞等の施工面等に吹き付ける工法
に適し、急結剤を用いる覆工コンクリートに関するもの
である。BACKGROUND OF THE INVENTION The present invention relates to a hydraulic composition (hereinafter referred to as "ecocement") produced from waste such as incinerated ash of municipal waste or incinerated sewage sludge.
The present invention relates to lining concrete using a quick setting agent, which is suitable for a method of spraying a construction surface such as a tunnel or an underground cavity.
【０００２】[0002]
【従来の技術】従来から、地山壁面やトンネルなどの覆
工工法としては、型枠を用いてコンクリートを流し込む
工法と、急結剤と圧縮空気とを用いることにより、型枠
を用いないでコンクリートを直接施工面に吹付ける吹付
け工法とがある。吹付けコンクリート工法としては、セ
メント、細骨材、粗骨材および急結剤をあらかじめ混合
し、ノズル手前で水を加える方法、すなわち乾式吹付け
工法と、セメント、細骨材、粗骨材および水を混練して
生コンクリートを造した後、急結剤をノズル手前で添加
する方法、いわゆる湿式吹付けコンクリート等が用いら
れている。（特開昭６１−９２２６３号公報など）2. Description of the Related Art Conventionally, as a method of lining a ground wall or a tunnel, a method of pouring concrete using a formwork and a method of using a quick-setting agent and compressed air without using a formwork. There is a spraying method in which concrete is sprayed directly on the construction surface. The spraying concrete method is a method in which cement, fine aggregate, coarse aggregate and quick setting agent are mixed in advance and water is added before the nozzle, that is, dry spraying method, cement, fine aggregate, coarse aggregate and A method of kneading water to produce ready-mixed concrete and then adding a quick-setting agent in front of the nozzle, that is, a so-called wet spray concrete is used. (JP-A-61-92263, etc.)
【０００３】一般的に覆工コンクリート工法に使用され
るコンクリートには、コンクリート強度が材齢１日で５
Ｎ／ｍｍ2以上、および材齢２８日で１８Ｎ／ｍｍ2以上
が、日本道路公団および日本鉄道建設公団より要求され
ている。一般的にコンクリートには普通ポルトランドセ
メントが用いられており、凝結および硬化を促進させる
急結剤とともに施工面に吹き付け、付着させ、所要の初
期強度を得る方法が採られている。[0003] In general, concrete used for the lining concrete method has a concrete strength of 5 days per day.
N / mm 2 or more and 18 N / mm 2 or more at 28 days of age are required by Japan Highway Public Corporation and Japan Railway Construction Public Corporation. Generally, Portland cement is generally used for concrete, and a method of obtaining a required initial strength by spraying and adhering to a construction surface together with a quick-setting agent for promoting setting and hardening is adopted.
【０００４】しかしながら、一般に用いられている急結
剤では、コンクリートに適量添加することによって所要
の付着力および初期強度は得られるが、逆に材齢２８日
以降の長期強度の発現は阻害され、急結剤を添加しない
コンクリート強度と比較すると、長期強度は通常約５０
〜７０％程度となる。さらに施工状況によっては、急結
剤を多量にコンクリートに添加する必要が生じることが
ある。例えばトンネルの天場面などへの吹き付けの場
合、コンクリートの剥落を防止するためには、コンクリ
ートに高い付着力および高い初期強度が求められる。こ
のような施工状況の場合には、前述した急結剤を通常よ
りも多く添加して初期の付着力を高めるのであるが、一
方では急結剤による長期強度発現の阻害の割合が通常よ
りも更に大きくなり、急結剤を添加しないコンクリート
強度と比較すると５０％以下となることもある。[0004] However, in a commonly used quick-setting agent, the required adhesive force and initial strength can be obtained by adding an appropriate amount to concrete, but on the other hand, the expression of long-term strength after 28 days of age is inhibited. Compared to concrete strength without the addition of a quick setting agent, long-term strength is typically about 50
It is about 70%. Further, depending on construction conditions, it may be necessary to add a large amount of quick-setting agent to concrete. For example, in the case of spraying on a ceiling scene of a tunnel or the like, high adhesion and high initial strength are required for concrete in order to prevent the concrete from falling off. In such a construction situation, the above-mentioned quick setting agent is added more than usual to increase the initial adhesive force, but on the other hand, the rate of inhibition of long-term strength development by the quick setting agent is higher than usual. It may be even larger, and may be 50% or less as compared with the concrete strength without the addition of a quick setting agent.
【０００５】このように吹付けコンクリートの材齢２８
日以降の長期強度の発現は、急結剤の添加量によって大
きく影響され、添加量の増加に比例して長期強度発現は
阻害される。このため、長期間にわたって耐久的な構造
物を構築するためには、なるべくコンクリートに添加す
る急結剤の添加量を少なくすることが重要であり、急結
剤の添加量が少なくとも所要の付着力および初期強度が
得られる方法を見出すことが課題となっている。As described above, the age of sprayed concrete is 28
The development of the long-term strength after the day is greatly affected by the amount of the quick-setting agent added, and the development of the long-term strength is inhibited in proportion to the increase in the addition amount. For this reason, in order to construct a structure that is durable for a long period of time, it is important to reduce the amount of the quick-setting agent added to concrete as much as possible. The challenge is to find a way to obtain the initial strength.
【０００６】一方、近年、都市ゴミや下水汚泥等の一般
廃棄物および産業廃棄物は著しく増加し、廃棄物の有効
利用、再資源化が各方面で試みられているが、廃棄物処
理に関する決定的な方法はなく、現状は、埋め立てに頼
っている。しかし、最近、セメントの製造分野では、廃
棄物の有効利用および再資源化を目的として、都市ゴミ
灰や下水汚泥等の廃棄物を原料としたエコセメントが製
造されている。On the other hand, in recent years, general waste such as municipal waste and sewage sludge and industrial waste have increased remarkably, and effective use and recycling of waste have been attempted in various fields. There is no traditional method, and at present, it depends on landfill. However, recently, in the field of cement production, ecocement made from waste such as municipal ash and sewage sludge has been produced for the purpose of effective use and recycling of waste.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、急結剤の添
加量が少なくとも必要かつ十分な初期強度が得られ、長
期強度の発現が阻害されにくい覆工コンクリートを提供
するとともに、廃棄物から製造されたエコセメントの用
途の拡大を通して廃棄物の有効利用および再資源化を図
ることができる覆工コンクリートを提供することを目的
とする。DISCLOSURE OF THE INVENTION The present invention provides a lining concrete in which the addition of a quick-setting agent is at least necessary and sufficient in initial strength is obtained, and the development of long-term strength is hardly hindered. It is an object of the present invention to provide a lining concrete capable of effectively utilizing and recycling wastes through expansion of uses of manufactured ecocement.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、斯かる実
情に鑑み鋭意研究を行った結果、エコセメントを用いる
ことにより、上記の課題を解決する覆工用コンクリート
を製造することを見出し、本発明を完成した。すなわち
本発明は、施工面に、あらかじめ練り混ぜたコンクリー
トに急結剤を添加して施工する覆工コンクリートであっ
て、あらかじめ練り混ぜるコンクリートに対して、都市
ゴミ焼却灰、下水汚泥焼却灰の一種以上を原料としてな
る焼成物であって、Ｃ11Ａ7ＣａＣｌ2、Ｃ3Ａの一種以
上を１０〜４０重量％および少なくともＣ2Ｓ、Ｃ3Ｓの
一種以上を含む焼成物と石膏からなる水硬性組成物を用
いることを特徴とする覆工コンクリートを提供するもの
である。Means for Solving the Problems The present inventors have conducted intensive studies in view of such circumstances, and as a result, have found that the use of eco-cement produces concrete for lining which solves the above-mentioned problems. Thus, the present invention has been completed. That is, the present invention is a lining concrete in which a quick-setting agent is added to concrete premixed on a construction surface and applied, and the concrete premixed is a kind of municipal waste incineration ash or sewage sludge incineration ash. A calcined product comprising the above as a raw material, characterized by using a hydraulic composition comprising gypsum and a calcined product containing 10 to 40% by weight of at least one of C11A7CaCl2 and C3A and at least one of C2S and C3S. It provides lining concrete.
【０００９】[0009]
【発明の実施の形態】本発明で用いるエコセメントは、
都市ゴミ焼却灰、下水汚泥焼却灰の一種以上を原料とし
てなる焼成物であって、Ｃ11Ａ7ＣａＣｌ2、Ｃ3Ａの一
種以上を１０〜４０重量％および少なくともＣ2Ｓ、Ｃ3
Ｓの一種以上を含む焼成物と石膏からなる水硬性組成物
である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The ecocement used in the present invention is:
A fired product using at least one of municipal waste incineration ash and sewage sludge incineration ash as a raw material, wherein at least one of C11A7CaCl2 and C3A is 10 to 40% by weight and at least C2S, C3
It is a hydraulic composition consisting of a calcined product containing one or more of S and gypsum.
【００１０】かかる水硬性組成物中のアルミニウム源は
焼却灰から主に由来するので、アルミニウム化合物の含
有量が１０重量％未満では、少量の急結剤の添加量で
は、十分な初期強度が得られない、長期強度の発現が阻
害される。又、焼却灰の使用量が少なくなり、廃棄物の
有効利用および再資源化の観点から好ましくない。一
方、アルミニウム化合物の含有量が４０重量％を超える
と水和の進行によって過大に膨張する場合がある。本発
明に用いる石膏は、無水石膏、二水石膏、半水石膏のい
ずれも使用でき、強度の発現性からＳＯ3／Ａｌ2Ｏ3の
モル比の範囲が０．５〜１．５になるように添加するの
が好ましい。この範囲外での石膏使用量では、十分な強
度発現が得られないか、施工上の障害が生ずる。Since the aluminum source in such a hydraulic composition is mainly derived from incinerated ash, when the content of the aluminum compound is less than 10% by weight, sufficient initial strength can be obtained with a small amount of the quick-setting additive. No, the expression of long-term strength is inhibited. Further, the amount of incinerated ash used is reduced, which is not preferable from the viewpoint of effective use of waste and recycling. On the other hand, if the content of the aluminum compound exceeds 40% by weight, excessive expansion may occur due to the progress of hydration. The gypsum used in the present invention may be any of anhydrous gypsum, gypsum dihydrate and gypsum hemihydrate, and is added so that the range of the molar ratio of SO3 / Al2O3 is 0.5 to 1.5 from the viewpoint of strength. Is preferred. If the amount of gypsum used is out of this range, sufficient strength cannot be obtained, or an obstacle in construction occurs.
【００１１】一般に、強い付着力および高い初期強度の
覆工コンクリートを得るためには、コンクリート中に急
結剤の添加量を多くする方法がおこなわれる。その急結
力が発現するメカニズムは一般的に以下のようである。In general, in order to obtain a lining concrete having a high adhesive strength and a high initial strength, a method of increasing the amount of a quick-setting agent added to the concrete is used. The mechanism by which the quick-setting force appears is generally as follows.
【００１２】急結剤の添加により、急結剤中やポルトラ
ンドセメント中に含まれるＣ3Ａ鉱物とＣａＳＯ4とが反
応する量を増すことにより、エトリンガイト（Ｃ3Ａ・
３ＣａＳＯ4・３２Ｈ2Ｏ）の生成速度が促進するため初
期の付着力が増進する。また同時に、ポルトランドセメ
ント中のＣ3ＳやＣ2Ｓの水和速度を促進して、水和物で
あるＣ−Ｓ−Ｈゲルの結晶化に寄与することでコンクリ
ートの強度発現が促進されるためである。The addition of the quick setting agent increases the amount of the C3A mineral contained in the quick setting agent or Portland cement that reacts with CaSO4, so that ettringite (C3A.
3CaSO 4 .32H 2 O) is generated at a higher rate, thereby increasing the initial adhesive force. At the same time, the hydration rate of C3S and C2S in Portland cement is promoted to contribute to the crystallization of the hydrated CSH gel, thereby promoting the development of concrete strength.
【００１３】しかし一方で、市販の急結剤は、一般的に
アルカリ含有量がセメントよりも高く、このアルカリの
影響によって長期強度の発現が低下する。このため、コ
ンクリートに添加する急結剤の添加量が少なくとも、施
工面に十分な付着力および初期強度が得られるベースコ
ンクリートを製造する必要がある。本発明者らの検討の
結果、請求項に記載したエコセメントを用いてベースコ
ンクリートを製造することにより、急結剤の添加量が少
量であっても十分な付着性状を示し、高い初期強度が得
られるとともに、長期強度の発現が阻害されない耐久性
に優れた吹付けコンクリートを提供することができる。On the other hand, commercially available quick-setting agents generally have a higher alkali content than cement, and the effect of this alkali reduces the development of long-term strength. For this reason, it is necessary to manufacture a base concrete in which the amount of the quick setting agent added to the concrete is at least sufficient to obtain a sufficient adhesive force and an initial strength on the construction surface. As a result of the study of the present inventors, by producing a base concrete using the eco-cement described in the claims, even if the addition amount of the quick setting agent is small, it shows a sufficient adhesive property, and a high initial strength is obtained. It is possible to provide a shotcrete which is obtained and has excellent durability which does not hinder the development of long-term strength.
【００１４】[0014]
【実施例】以下本発明を実施例および比較例によりさら
に説明するが、本発明は、これらの例に限定されるもの
ではない。The present invention will be further described below with reference to examples and comparative examples, but the present invention is not limited to these examples.
【００１５】（実施例１〜３）実施例１〜３に示すセメ
ントとしては、以下の製造法によって得られたエコセメ
ントを用いた。表１に示す都市ゴミ焼却灰４３．３重量
％、石灰石粉５４．５重量％、アルミ灰１．３重量％、
粘土０．９重量％を原料として、ロータリーキルンを用
いて１３００〜１３５０℃でクリンカーを焼成した。得
られたクリンカーは、縦型ミルでブレーン比表面積が４
０００ｃｍ２／ｇになるよう粉砕し、この焼成物１００
重量に対して無水石膏を１２重量部添加してブレーン比
表面積が４７００ｃｍ２／ｇのエコセメントを製造し
た。なお、製造した焼成物の化学成分を表２に示す。(Examples 1 to 3) As cements shown in Examples 1 to 3, ecocements obtained by the following production method were used. 43.3% by weight of municipal incineration ash shown in Table 1, 54.5% by weight of limestone powder, 1.3% by weight of aluminum ash,
Clinker was fired at 1300 to 1350 ° C. using a rotary kiln using 0.9% by weight of clay as a raw material. The resulting clinker was subjected to a vertical mill with a Blaine specific surface area of 4
Crushed to 000 cm2 / g.
12 parts by weight of anhydrous gypsum was added to the weight to produce an ecocement having a specific surface area of the brane of 4700 cm2 / g. Table 2 shows the chemical components of the manufactured fired product.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【表２】 （実施例４〜６）実施例４〜６に示すセメントとして
は、以下の製造法によって得られたエコセメントを用い
た。表３に示す都市ゴミ焼却灰２９．８重量％、石灰石
粉６８．６重量％、アルミ灰１．５重量％、粘土０．２
重量％を原料として、ロータリーキルンを用いて１３０
０〜１３５０℃でクリンカーを焼成した。得られたクリ
ンカーは、縦型ミルでブレーン比表面積が４０００ｃｍ
2／ｇになるよう粉砕し、この焼成物１００重量に対し
て無水石膏を１２重量部添加してブレーン比表面積が４
７００ｃｍ2／ｇのエコセメントを製造した。なお、製
造した焼成物の化学成分を表４に示す。[Table 2] (Examples 4 to 6) As the cement shown in Examples 4 to 6, ecocement obtained by the following production method was used. 29.8% by weight of municipal waste incineration ash, 68.6% by weight of limestone powder, 1.5% by weight of aluminum ash, and 0.2% of clay shown in Table 3
Weight% as a raw material and 130
The clinker was calcined at 0-1350 ° C. The resulting clinker was subjected to a vertical mill with a Blaine specific surface area of 4000 cm.
2 / g, and 12 parts by weight of anhydrous gypsum were added to 100 parts by weight of the calcined product, and the Blaine specific surface area was 4%.
700 cm2 / g of ecocement was produced. Table 4 shows the chemical components of the manufactured fired product.
【００１８】[0018]
【表３】 [Table 3]
【００１９】[0019]
【表４】 [Table 4]
【００２０】急結剤としては、アルミン酸アルカリ塩系
（略号Ａ、粉末）、セメント鉱物系（略号Ｂ、粉末）、
カルシウムアルミネート系（略号Ｃ、粉末）の３種を用
いた。表５に示すベースコンクリートおよび急結剤の配
合により、吹付けコンクリートを調整し、その初期強度
および長期強度を測定した。なお、吹付けの際のコンク
リート温度は約２０℃である。得られた結果を表６に示
す。Examples of the quick setting agent include alkali aluminate (abbreviation A, powder), cement mineral (abbreviation B, powder),
Three types of calcium aluminate (abbreviation C, powder) were used. Shotcrete was prepared by mixing the base concrete and the quick setting agent shown in Table 5, and its initial strength and long-term strength were measured. In addition, the concrete temperature at the time of spraying is about 20 degreeC. Table 6 shows the obtained results.
【００２１】[0021]
【表５】 [Table 5]
【００２２】[0022]
【表６】 [Table 6]
【００２３】吹付けコンクリートの材齢３時間の初期強
度は、土木学会基準ＪＳＣＥ−Ｇ５６１に準じてプルア
ウト試験により行い材齢１日および２８日強度は、作製
したコンクリートパネルよりコア供試体（φ５０ｍｍ、
長さ１００ｍｍ）を切り出して圧縮強度試験を行った。
吹付けコンクリートの供試体の作り方およびコアの切り
出し方法は、ＪＳＣＥ−Ｆ５６１およびＪＩＳ Ａ１１
０７に準じた。細骨材としては陸砂、比重２．６０、粗
粒率２．７２を用い、粗骨材としては６号砕石、比重
２．６３を用いた。分散剤にはリグニンスルホン酸化合
物およびポリオール複合体を主成分とした市販品のもの
を使用した。The initial strength of shot concrete at 3 hours of age is determined by a pull-out test according to JSCE-G561 of the Japan Society of Civil Engineers.
(Length 100 mm) was cut out and subjected to a compressive strength test.
The method of preparing a test piece of shotcrete and the method of cutting out a core are described in JSCE-F561 and JIS A11.
07. As fine aggregate, land sand, specific gravity 2.60 and coarse particle ratio 2.72 were used, and as coarse aggregate, No. 6 crushed stone and specific gravity 2.63 were used. As the dispersing agent, a commercially available dispersing agent containing a lignin sulfonic acid compound and a polyol complex as main components was used.
【００２４】（比較例１〜３）セメントとして市販の普
通ポルトランドセメントを用い、急結剤として実施例と
同じのＡ〜Ｃまでの３種類を用いた。また、細骨材およ
び粗骨材は、実施例と同じ陸砂と６号砕石を用いて比較
した。コンクリートの配合組成および結果を実施例とあ
わせて表５および表６に示す。表５より実施例１〜６
は、比較例１〜３よりも少ない急結剤添加量で施工面に
吹き付けが可能であり、また、表6より、通常の吹き付
けコンクリートの設計基準強度を十分満足する高い初期
強度と長期強度が得られている。さらに表６より、実施
例は比較例と比べて、材齢２８日において急結剤を添加
しない。コンクリートに対して強度発現の低下が少ない
結果が得られている。(Comparative Examples 1 to 3) Commercially available ordinary Portland cement was used as cement, and the same three types A to C as in the example were used as quick setting agents. The fine aggregate and coarse aggregate were compared using the same land sand and No. 6 crushed stone as in the example. Tables 5 and 6 show the composition and results of the concrete together with the examples. From Table 5, Examples 1 to 6
Can be sprayed on the construction surface with a smaller amount of quick-setting additive than Comparative Examples 1-3, and, from Table 6, high initial strength and long-term strength that sufficiently satisfies the design standard strength of ordinary sprayed concrete Have been obtained. Further, as shown in Table 6, the examples do not include a quick setting agent at the age of 28 days as compared with the comparative examples. The result that the decrease in strength development is small compared to concrete is obtained.
【００２５】[0025]
【発明の効果】本発明によれば、特定の組成を有するエ
コセメントを、急結剤を添加する覆工コンクリートに用
いることによって、急結剤の添加量が少量であっても良
好な急結性を示し、しかも高い初期強度および、長期強
度発現が阻害されにくい吹付けコンクリートを提供する
ことができる。According to the present invention, an eco-cement having a specific composition is used for lining concrete to which a quick-setting agent is added, so that a good quick-setting can be achieved even if the amount of the quick-setting agent is small. It is possible to provide a shotcrete that exhibits good properties and has high initial strength and hardly hinders the development of long-term strength.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０４Ｂ 22:14 22:08） 103:12 ──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. 6 Identification code FI C04B 22:14 22:08) 103: 12
Claims (1)
リートに急結剤を添加して施工するコンクリートの覆工
工法に使用するコンクリートであって、あらかじめ練り
混ぜるコンクリートとして、都市ゴミ焼却灰、下水汚泥
焼却灰の一種以上を原料としてなる焼成物であって、Ｃ
11Ａ7ＣａＣｌ2、Ｃ3Ａの１種以上を１０〜４０重量
％、および少なくともＣ2Ｓ、Ｃ3Ｓの１種以上を含む焼
成物と石膏とからなる水硬性組成物を用いることを特徴
とする覆工コンクリート。（ここでＣ：ＣａＯ、Ａ：Ａ
l2Ｏ3、Ｓ：ＳｉＯ2を表す）Claims: 1. A concrete used for a concrete lining method in which a quick-setting agent is added to concrete premixed on a construction surface, and the concrete to be premixed is municipal waste incineration ash or sewage sludge. A fired product made from at least one kind of incinerated ash,
A lining concrete comprising a hydraulic composition comprising a calcined product containing 10-40% by weight of at least one of 11A7CaCl2 and C3A and at least one of C2S and C3S and gypsum. (Where C: CaO, A: A
l2O3, S: represents SiO2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36576397A JPH11180750A (en) | 1997-12-22 | 1997-12-22 | Lining concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36576397A JPH11180750A (en) | 1997-12-22 | 1997-12-22 | Lining concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11180750A true JPH11180750A (en) | 1999-07-06 |
Family
ID=18485051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36576397A Pending JPH11180750A (en) | 1997-12-22 | 1997-12-22 | Lining concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11180750A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005170723A (en) * | 2003-12-10 | 2005-06-30 | Denki Kagaku Kogyo Kk | Spray material, quick setting spray cement concrete, and spray construction method using them |
| CN110790542A (en) * | 2019-12-09 | 2020-02-14 | 北京矿冶科技集团有限公司 | Baking-free brick prepared from copper, lead and zinc smelting wastewater sludge and preparation method thereof |
-
1997
- 1997-12-22 JP JP36576397A patent/JPH11180750A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005170723A (en) * | 2003-12-10 | 2005-06-30 | Denki Kagaku Kogyo Kk | Spray material, quick setting spray cement concrete, and spray construction method using them |
| JP4537044B2 (en) * | 2003-12-10 | 2010-09-01 | 電気化学工業株式会社 | Spraying method |
| CN110790542A (en) * | 2019-12-09 | 2020-02-14 | 北京矿冶科技集团有限公司 | Baking-free brick prepared from copper, lead and zinc smelting wastewater sludge and preparation method thereof |
| CN110790542B (en) * | 2019-12-09 | 2022-04-01 | 北京矿冶科技集团有限公司 | Baking-free brick prepared from copper, lead and zinc smelting wastewater sludge and preparation method thereof |
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