JP6018478B2 - Soil improvement material - Google Patents
Soil improvement material Download PDFInfo
- Publication number
- JP6018478B2 JP6018478B2 JP2012240032A JP2012240032A JP6018478B2 JP 6018478 B2 JP6018478 B2 JP 6018478B2 JP 2012240032 A JP2012240032 A JP 2012240032A JP 2012240032 A JP2012240032 A JP 2012240032A JP 6018478 B2 JP6018478 B2 JP 6018478B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum hydroxide
- soil improvement
- lime
- improvement material
- soil
- 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
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
この発明は、河川、湖沼の底泥、シールド工事等から発生する建設汚泥等、泥状物の処理、搬出等での改質直後のハンドリング性状を改良する土質改良材に関する。 The present invention relates to a soil quality improving material for improving handling properties immediately after reforming in processing, carrying out or the like of sludge such as river, lake bottom mud, construction sludge generated from shield construction, and the like.
底泥、建設汚泥等は、最適含水比を大幅に超える水分を含有しており、搬出、処理、運搬等に支障をきたす為、何らかのハンドリング改良が求められている。 Mud, construction sludge, etc. are contained moisture exceeds the optimal water content ratio significantly, unloading, processing, for hindering the transportation and the like, are required any handling improvements.
また、汚泥のハンドリング改良には、従来グアガムやアクリル系等の高分子吸水材、生石灰、半水石膏等を添加混合し、トラフィカビリティー等ハンドリングを改良して搬出、運搬されている。 In addition, for improving sludge handling, conventional water-absorbing materials such as guar gum and acrylic, quick lime, hemihydrate gypsum, etc. are added and mixed, and handling such as trafficability is improved and carried out.
高分子吸水材は少量の添加で瞬時に土質性状を変える事が出来る優れた材料であるが、処分場に持ち込んだ後雨水等の浸入により再泥化するし、.強度は発現しない為処理土の地盤としての活用は出来ず、グアガム等天然物の場合は土中の微生物により分解され、腐敗臭を発生する粒子が見られ、処分場によっては嫌われる事がある等の問題点が有る。 Polymer water-absorbing material is an excellent material that can change the soil properties instantaneously with the addition of a small amount, but after being brought into the disposal site, it re-mudged due to intrusion of rainwater, etc. In the case of natural products such as guar gum, there is a problem that particles that are decomposed by microorganisms in the soil and generate a rotting odor are seen and may be disliked depending on the disposal site.
改良土が、アルカリ性になっても良い場合は生石灰が用いられる。生石灰は汚泥中の水分と反応して消石灰となる為、瞬時に吸水し、かつ発熱により蒸発による脱水も起こる為、広く活用されている。又土中の粘土鉱物とポゾラン反応し強度も発現出来る優れた材料である。
しかし、
第１に、石灰が土中のアンモニウム塩と反応しアンモニア臭を発生し、改良時の高い発熱により臭気が助長される。
第２に、生石灰は顆粒状又は粉状品でも数ｍｍ篩で篩分けられたもので改良土に白い石灰の粒子が見られ、処分場によっては嫌われる事がある。
第３に、生石灰を現場で貯蔵する場合は加水による発熱の懸念が有り、消防署への届出が必要となる。
Quick lime is used when the improved soil may be alkaline. Quick lime reacts with moisture in the sludge and turns into slaked lime, so it absorbs water instantly and dehydration due to evaporation occurs due to heat generation, so it is widely used. In addition, it is an excellent material that can exhibit strength by reacting with clay minerals in soil.
But,
First, lime reacts with the ammonium salt in the soil to generate an ammonia odor, and the odor is promoted by the high heat generation during the improvement.
Secondly, quick lime is granulated or powdered and screened with a few mm sieve, and white lime particles are seen in the improved soil, which may be disliked depending on the disposal site.
Thirdly, when quicklime is stored on site, there is a concern of heat generation due to water, and notification to the fire department is required.
また、半水石膏は、中性固化材として用いられ、固化反応がセメントに比べて極めて速いので搬出までの間にハンドリング性状を改善する事が出来る。しかし、石膏は高含水比の汚泥では再泥化し、また、石膏の中にはフッ素を含有するものが多く、さらには、処分場でのフッ素溶出の懸念が有り、石膏が土中の硫酸還元菌により還元され、硫化水素を発生する場合がある、という問題を有していた。 Moreover, hemihydrate gypsum is used as a neutral solidifying material, and since the solidification reaction is extremely faster than cement, handling properties can be improved before unloading. However, gypsum is re-sludged in sludge with a high water content ratio, and some gypsum contains fluorine, and there is a concern of fluorine elution at the disposal site. There was a problem that it might be reduced by bacteria and generate hydrogen sulfide.
この発明は、かかる現状に鑑み創案されたものであって、その目的とするところは、泥土に加えて混合攪拌する事により直ちにハンドリング性状を改善し、搬出運搬後に強度を発現するので処理場で再泥化しない土質改良材を提供しようとするものである。 The present invention was devised in view of the current situation, and the object of the invention is to immediately improve handling properties by mixing and stirring in addition to mud, and to develop strength after unloading and transportation. It is intended to provide a soil improvement material that does not re-mud.
上記目的を達成するため、この請求項１の発明に係る土質改良材にあっては、石灰と水酸化アルミニウムとして非晶質水酸化アルミニウムを用い、泥土の流動性、粘り気を除去し、ハンドリングを改良し、降雨等により軟弱化しない材料で構成したことを特徴とする。 In order to achieve the above object, the soil improvement material according to the invention of claim 1 uses amorphous aluminum hydroxide as lime and aluminum hydroxide, removes fluidity and stickiness of mud, and handles it. It is improved and made of a material that does not weaken due to rain or the like.
請求項２に記載の発明にあっては、請求項１に記載の土質改良材を技術的前提とし、前記石灰として消石灰用いたことを特徴とする。 The invention according to claim 2 is characterized in that the soil improvement material according to claim 1 is a technical premise and slaked lime is used as the lime.
それ故、この発明に係る土質改良材にあっては、アルミ二ウム製品の表面処理工程であるアルマイト処理で発生するアルミスラッジを乾燥粉砕した水酸化アルミニウムは非晶質で活性が高く、色々な分野で活用されているが、これに消石灰を加えると直ちにカルシウムアルミネート水和物を生成し、土壌のハンドリング性状を改善し、石灰として生石灰を用いるより効果が高い事を見出した。
又、上記水和物生成により粒子間の間隙水を急速に取り除き、粘り気が残らない為、夾雑物除去の為の篩い分け時にも団子状にならず、篩目を通過出来る。従来技術の特開２０１２−１７６３９４では含水した荷電を有する粒子及び異物を含む廃棄物が対象であるが、本発明は凝集作用ではなく、水和物生成によるハンドリング性状の向上である。
Therefore, in the soil improvement material according to the present invention, aluminum hydroxide obtained by drying and pulverizing aluminum sludge generated in alumite treatment, which is a surface treatment process for aluminum products, is amorphous and highly active. It has been used in the field, but when slaked lime was added to it, it immediately formed calcium aluminate hydrate, improved the soil handling properties, and found that it was more effective than using quicklime as lime.
Moreover, since the interstitial water between particles is rapidly removed by the formation of the hydrate, and no stickiness remains, it does not form a dumpling and can pass through the mesh when sieving to remove impurities. The prior art Japanese Patent Application Laid-Open No. 2012-176394 deals with waste containing water-containing charged particles and foreign matters, but the present invention is not an aggregating action but an improvement in handling properties by hydrate formation.
生成するカルシウムアルミネート水和物 ３ＣａＯ・Ａｌ２Ｏ３・６Ｈ２Ｏ から純度を１００％で材料比率を算出すると消石灰５８．７％、非晶質水酸化アルミニウム４１．３％であるが各々湿分不純物を含んでおり各々５０％程度が良く、消石灰が過剰でも土中の粘土鉱物と反応することができる。
石灰として生石灰、水酸化アルミニウムとして結晶質を用いる場合も上記化学量論的にカルシウムアルミネート水和物を生成出来る比率が望ましい。
Calcium aluminate hydrate 3CaO.Al2O3.6H2O The material ratio is calculated at 100% purity. It is 58.7% slaked lime and 41.3% amorphous aluminum hydroxide, but each contains moisture impurities. Each is about 50% and can react with clay minerals in the soil even if there is an excess of slaked lime.
In the case where quick lime is used as lime and crystalline is used as aluminum hydroxide, the above stoichiometric ratio of producing calcium aluminate hydrate is desirable.
次に、この発明の実施の一形態例に基づき、この発明を詳細に説明する。 Next, the present invention will be described in detail based on an embodiment of the present invention.
１．
初期性状
丸中シルト＃２５０に水を加えた模擬泥土にＡ〜Ｄの配合の改良材を加えた。直ちに性状が変化するのでホバートミキサーで３０秒混合攪拌し、ミニスランプでその初期性状を比較した。。
1.
Initial properties Improved materials having a combination of A to D were added to simulated mud with water added to Marunaka Silt # 250. Since the properties changed immediately, they were mixed and stirred for 30 seconds with a Hobart mixer, and their initial properties were compared with a mini slump. .
表１からも明らかなように、Ａはほとんど０に近い値でほぼコーンの原型のままとなった。AとBとの差は水酸化アルミニウムの違いであり、非晶質水酸化アルミニウムの水和活性の高さにより初期性状が大きく改善された。 As is clear from Table 1, A was almost a value of 0, and the shape of the cone was almost maintained. The difference between A and B is that of aluminum hydroxide, and the initial properties were greatly improved by the high hydration activity of amorphous aluminum hydroxide.
ＡとＣとの差は石灰の種類で非晶質水酸化アルミニウムを用いる場合は生石灰より消石灰の方が水和反応が速い事を見出した。一方、BとＤでは、生石灰の吸水反応が寄与する為、Ｂの方がスランプ値が大きくなった。 The difference between A and C was the type of lime, and when amorphous aluminum hydroxide was used, slaked lime was found to have a faster hydration reaction than quick lime. On the other hand, in B and D, the water absorption reaction of quick lime contributes, so that B has a larger slump value.
２．実泥土での試験 2. Testing in real mud
各々原土に加水し、泥土状とし改良材を３０ｋｇ／ｍ３添加した。 Each was hydrated to the original soil to form a mud, and 30 kg / m 3 of an improved material was added.
その結果、僅かな添加量で変質し、低強度ながら固化し、材例の経過による再泥化は見られなかった。 As a result, the material was altered with a slight addition amount, solidified with low strength, and no re-mudging was observed due to the progress of the material examples.
尚、表３中、泥土 : 宮城県石巻市の河川に堆積したヘドロ、見かけは黒い色をした羊羹状ゲルの状態で、木屑等のゴミを多く含むものを使用した。単位体積重量１．１２ｋｇ／Ｌ。
また、改質剤
（Ａ）は、非晶質水酸化アルミニウム１ : 消石灰 １
改質剤（Ｂ）は、非晶質水酸化アルミニウム
１ : 消石灰 ２
高分子ポリマー（Ａ）は、高分子凝集剤系材料 一般残土の改質としては、１．０〜３．０ｇ／Ｌ、
高分子ポリマー（Ｂ）は、高分子吸水性樹脂材料 一般残土の改質としては、１．０〜５．０ｇ／Ｌ 、
さらに、手順としては、
先ず、泥土１０００ｇを計量してパレットに広げ、改質材料を所定量計量し泥土にまぶす様に添加した。
次に、手の指先で、軽く3分ほどの混合を行なった。
目視評価は、３分経過した泥土の状態を評価した。
網の通過は、１辺角２０ｍｍの篩い網を軽く叩きながら改質した泥土を１０００ｃｃを通過させた残量を計量した。
In Table 3, mud soil: sludge deposited in a river in Ishinomaki City, Miyagi Prefecture, which looks like a black sheep-like gel and contains a lot of garbage such as wood chips. Unit volume weight 1.12 kg / L.
The modifier (A) is amorphous aluminum hydroxide 1: slaked lime 1
The modifier (B) is amorphous aluminum hydroxide 1: slaked lime 2
The polymer (A) is a polymer flocculant-based material General soil modification is 1.0 to 3.0 g / L,
The polymer (B) is a polymer water-absorbent resin material.
Furthermore, as a procedure,
First, 1000 g of mud was weighed and spread on a pallet, and a predetermined amount of reforming material was weighed and added to the mud.
Next, lightly mixed for about 3 minutes with the fingertips of the hand.
Visual evaluation evaluated the state of the mud after 3 minutes.
For passing the net, the remaining amount of 1000 cc of the modified mud was measured while tapping a sieve net having a side angle of 20 mm.
Claims (2)
消石灰と、水酸化アルミニウムとして非晶質水酸化アルミニウムとを、化学量論的にカルシウムアルミネート水和物である３ＣａＯ・Ａｌ 2 Ｏ 3 ・６Ｈ 2 Ｏを生成出来る材料比率で含有してなることを特徴とする土質改良材。 It is a soil improvement material for improving the fluidity of mud, handling of stickiness, etc., composed of materials that do not weaken due to rainfall, etc. (excluding cases containing semi-water gypsum or calcium sulfate hardener),
De lime, and amorphous aluminum hydroxide, comprising at 3CaO · Al 2 O 3 · 6H 2 material ratio O to be generated is a stoichiometric calcium aluminate hydrates as aluminum hydroxide A soil improvement material characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012240032A JP6018478B2 (en) | 2012-10-31 | 2012-10-31 | Soil improvement material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012240032A JP6018478B2 (en) | 2012-10-31 | 2012-10-31 | Soil improvement material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2014088518A JP2014088518A (en) | 2014-05-15 |
| JP6018478B2 true JP6018478B2 (en) | 2016-11-02 |
Family
ID=50790681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012240032A Active JP6018478B2 (en) | 2012-10-31 | 2012-10-31 | Soil improvement material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6018478B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02225590A (en) * | 1986-12-29 | 1990-09-07 | Masukawa Kensetsu Kk | Soil stabilizer |
| JPH1060434A (en) * | 1996-08-19 | 1998-03-03 | Okutama Kogyo Kk | Setting agent for soil having high water content |
| JP2001079535A (en) * | 1999-09-14 | 2001-03-27 | Onoda Chemico Co Ltd | Detoxification of volatile organochlorine compounds in soil |
| JP5477834B2 (en) * | 2007-08-24 | 2014-04-23 | 株式会社立花マテリアル | Gypsum solidified material |
| JP2010053023A (en) * | 2008-07-29 | 2010-03-11 | Tachibana Material Co Ltd | Grouting material |
-
2012
- 2012-10-31 JP JP2012240032A patent/JP6018478B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014088518A (en) | 2014-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Khan et al. | Removal of phosphorus from an aqueous solution by nanocalcium hydroxide derived from waste bivalve seashells: mechanism and kinetics | |
| CN101863601A (en) | Flocculation curing agent, composition thereof and stabilization improvement method of silt type soil | |
| JP7067943B2 (en) | Additives for soil granulation | |
| JP7073088B2 (en) | Soil reforming method | |
| JP5477834B2 (en) | Gypsum solidified material | |
| US10850256B2 (en) | Insolubilizing agent for specific toxic substances, method for insolubilizing specific toxic substances using same, and soil improving method | |
| JP7105595B2 (en) | Method for producing additive material for soil granulation and method for modifying soil | |
| JP2015181994A (en) | Selenium insolubilizing material for soil and method for insolubilizing selenium in soil | |
| JP2008106088A (en) | Powder solidifying material for soft mud soil and method for producing the same | |
| JP6587114B1 (en) | Heavy metal pollution control material and heavy metal pollution control method using the pollution control material | |
| JP6018478B2 (en) | Soil improvement material | |
| JP6261120B2 (en) | Neutron shielding concrete and its manufacturing method | |
| TWI624433B (en) | Rubble treatment composition and rubble treatment method | |
| JP2004136160A (en) | Harmful heavy metal trapping material | |
| JP2008255171A (en) | Fixing agent for inorganic harmful components | |
| US20160318798A1 (en) | Recovery of value added industrial products from flue-gas desulfurization waste waters at power plants | |
| JP2008050522A (en) | Soil improver and soil improvement method using the same | |
| CN101544891A (en) | Soil body stabilizing agent | |
| JP7067192B2 (en) | Manufacturing method of slag molded body and slag molded body and repair method of water environment | |
| JP5077777B2 (en) | Elution reduction material and elution reduction treatment method | |
| CN103342489A (en) | Desulfuration residue concrete admixture and preparation method thereof and concrete containing admixture | |
| JP4584630B2 (en) | Soil improvement material | |
| JP2023033045A (en) | Method for producing fluorine insolubilization agent and bentonite dehydration cake | |
| JP2010089069A (en) | Method for reducing amount of water of accumulated mud in water treatment plant and sewage sludge | |
| JP2021014573A (en) | Soil solidifying agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RD03 | Notification of appointment of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7423 Effective date: 20140310 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20150820 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20160411 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20160506 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20160620 |
|
| 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: 20160920 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20160930 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6018478 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 |