JP5857366B2 - Acid relaxation method using converter slag - Google Patents

Acid relaxation method using converter slag Download PDF

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JP5857366B2
JP5857366B2 JP2013507831A JP2013507831A JP5857366B2 JP 5857366 B2 JP5857366 B2 JP 5857366B2 JP 2013507831 A JP2013507831 A JP 2013507831A JP 2013507831 A JP2013507831 A JP 2013507831A JP 5857366 B2 JP5857366 B2 JP 5857366B2
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soil
converter slag
acid
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base material
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JPWO2012133877A1 (en
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浜崎　拓司
拓司 浜崎
田中　賢治
賢治 田中
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Nippon Steel Corp
Japan Conservation Engineers Co Ltd
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Japan Conservation Engineers Co Ltd
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Description

本発明は，間伐，抜打ち等の森林整備が遅れることで土壌の酸性化が進行して土壌養分が流亡，団粒化が損なわれて土砂流出防止等の公益的機能が維持できなくなったスギ，ヒノキ等の人工林や酸性硫酸塩土壌等の特殊土壌であることから強酸性となって土壌ｐＨの著しい低下を起こしている対象地に対して，鋼を作る際に発生する転炉スラグと有機質資材等を混合した客土を植生基材吹付機で対象面に吹き付ける手法や播き出す手法，油圧ショベルで混合する手法によって，土壌ｐＨが著しく低下して機能不全となっている土壌構造の改善することを可能にしたものである。   The present invention is a Japanese cedar where the acidification of the soil has progressed due to delays in forest maintenance such as thinning and punching, and soil nutrients have been washed away and aggregates have been impaired, preventing public interest functions such as prevention of sediment runoff, Converter slag and organic matter generated when steel is produced for target sites that are strongly acidic and cause a significant drop in soil pH due to special forests such as cypress artificial forests and acidic sulfate soils. Improve the soil structure where the soil pH has been lowered and malfunctioned by the method of spraying and mixing the soil with the vegetation base sprayer, the method of sowing, and the method of mixing with a hydraulic excavator. That made it possible.

一般的にスギ，ヒノキに代表される人工林では，間伐，枝打ち等の森林整備事業によって，立木密度を低下させることで森林内照度を確保すれば森林の機能が回復するとされてきた。しかし，過密に植栽された人工林内は低照度によって維持されている期間が長いことから土壌の酸性化の進行が顕著となっている。
また，酸性硫酸塩土壌等の特殊土壌によって土壌ｐＨが著しく低下して強酸性となっている箇所においても，そのまま放置した状態で土壌環境の改善が望めない状態となっている。その対処法として，無機物である石灰岩砕石，鉱滓スラグ，貝殻類およびコンクリート廃材等を用いて酸性緩和をする方法とアルカリ資材に有機質資材を混合した酸遮断層を設けて酸性緩和してきた経緯がある。In planted forests represented by cedar and cypress, it has been said that the forest function can be restored by securing the illuminance in the forest by reducing the density of trees by reducing forest density such as thinning and pruning. However, the acidification of the soil has become remarkable due to the long period of time in the planted forests that have been planted overcrowded due to low illumination.
In addition, even in places where the soil pH is significantly lowered due to special soil such as acidic sulfate soil and is strongly acidic, it is not possible to improve the soil environment when left as it is. As a countermeasure, there is a method of acid relaxation using inorganic limestone crushed stone, slag slag, shells, concrete waste, etc. and a history of acid relaxation by providing an acid blocking layer in which organic materials are mixed with alkali materials. .

特開平１１−６１１１９号公報の発明Invention of JP-A-11-61119 特開２０００−２６５４７０号公報の発明Invention of JP 2000-265470 A 特開２０００−２８２０３４号公報の発明Invention of Japanese Patent Laid-Open No. 2000-282034

ところが，上記の従来工法の無機質である石灰岩砕石，鉱滓スラグ，貝殻類およびコンクリート廃材等を酸性緩和に単体で用いる手法では，アルカリ無機物の粒径を酸性緩和の効果の過度の発現を緩和するために調整しなければならず，アルカリ資材単独で用いることから，粒径を大きくしないと固化してしまい土壌水分の浸透が著しく悪くなることも問題となっていた。
また，アルカリ資材に有機物資材を混合して酸性遮断層を作る方法も考案されているものの，植栽木の土壌に酸性の緩衝機能がないことから，緩衝酸性土壌の影響を遮断層で緩衝できずに植栽木が枯死することが問題となっている。However, the method of using limestone crushed stone, slag slag, shells, concrete waste, etc., which are inorganic substances of the above-mentioned conventional method alone, for acid mitigation alone, reduces the particle size of alkali minerals in order to mitigate the excessive expression of the effect of acid mitigation. Since the alkaline material alone is used, solidification occurs unless the particle size is increased, and the penetration of soil moisture is significantly deteriorated.
In addition, although an organic material is mixed with an alkaline material to create an acidic barrier layer, the soil of planted trees does not have an acidic buffer function, so the effect of buffered acidic soil cannot be buffered by the barrier layer. The problem is that the planted trees die.

ｐＨが４．４を下回る環境であることから養分を持つ力である陽イオン交換容量（ＣＥＣ）が著しく低下し，アルミニウム等の有害な塩基分が流れ出し，土壌構造が単粒化してしまう土壌環境に対して有機質資材であるパーク堆肥に強アルカリ資材である転炉スラグ，肥料，ゼオライト等を混合した植生基盤を吹き付け，播き出し，油圧ショベルで混合することで，植物が成長する土壌環境となると伴に酸性緩和も行える植生基盤を造成できるようにした。   Soil environment where the cation exchange capacity (CEC), which is the power to have nutrients, is significantly reduced because the pH is less than 4.4, and harmful bases such as aluminum flow out and the soil structure becomes a single grain. On the other hand, by spraying a vegetation base made of organic materials such as park compost mixed with strong alkaline materials such as converter slag, fertilizer, zeolite, etc. At the same time, a vegetation base that can reduce acidity can be created.

また，間伐，枝打ち等の森林整備が遅れることで土壌の酸性化が進行して土壌養分が流亡，団粒化が損なわれて土砂流出防止等の公益的機能が維持できなくなったスギ，ヒノキ等の人工林や酸性硫酸塩土壌等の特殊土壌であることから土壌ｐＨの著しい低下して強酸性土壌となっている対象地に対し，鋼を作る際に発生する転炉スラグと有機質資材を混合した低下して機能不全となっている土壌構造を改善することを目的とする。   Also, cedar, cypress, etc. that have become unable to maintain public functions such as prevention of sediment discharge due to the loss of soil nutrients due to delays in forest maintenance such as thinning and pruning, and soil nutrients have been washed away and aggregated. Because of special soils such as artificial forests and acid sulfate soils, converter slag generated when steel is mixed with organic materials for target sites that have become highly acidic soils with a drastic drop in soil pH The purpose is to improve the soil structure that has been lowered and dysfunctional.

本発明の第１は，転炉スラグを用いた酸性緩和工法において，間伐，枝打ち等の森林整備が遅れることで土壌の酸性化が進行して土壌養分が流亡，団粒化が損なわれて土砂流出防止等の公益的機能が維持できなくなったスギ，ヒノキ等の人工林や酸性硫酸塩土壌等の特殊土壌であることから土壌ｐＨが著しく低下して強酸性土壌となっている対象地において、転炉スラグと有機質資材とを混合してなる客土に植物の種子や肥料及び粘結剤を加えたものを酸性緩和基盤材とし，当該酸性緩和基盤材を土壌ｐＨが低下して強酸性土壌となっている対象地に供給することによって土壌ｐＨが著しく低下して機能不全となっている土壌構造を改善できるようにしたものである。   The first aspect of the present invention is that in the acid mitigation method using converter slag, the acidification of the soil progresses due to the delay in forest maintenance such as thinning, pruning, etc. In the target area where soil pH is significantly lowered and it is a strong acid soil because it is a special soil such as artificial forests such as cedar and cypress and acid sulfate soil that can no longer maintain public functions such as runoff prevention, An acid mitigation base material made by mixing plant slag and organic materials with plant seeds, fertilizers, and binders is used as an acid mitigation base material. By supplying to the target site, the soil pH is remarkably lowered and the soil structure that is malfunctioning can be improved.

本発明の第２は，第１の発明に係る転炉スラグを用いた酸性緩和工法において，転炉スラグとバーク堆肥単独またはパーク堆肥に微生物発酵等のプロセスを経た未分解の草本，木本のチップの少なくとも一種を加えたバーク系の有機質資材と極強酸性の酢液に浸して養生することによって生成される腐植土を混合してなる客土に植物の種子や肥料及び粘結剤を加えて酸性緩和基盤材とし，当該客土のうち，有機質資材と腐植土に対する転炉スラグの配合割合を容量換算で０．５〜９０％に設定し，配合された酸性緩和基盤材を上記対象地に吹き付けを行うようにしたものである。   A second aspect of the present invention is an acid mitigation method using the converter slag according to the first invention, in which the converter slag and bark compost alone or park compost are subjected to a process such as microbial fermentation, undecomposed herbaceous and woody Add plant seeds, fertilizers and binders to the customer's soil, which is a mixture of bark organic material with at least one type of chip and humus soil produced by soaking in a highly acidic vinegar solution. The ratio of converter slag to organic material and humus soil is set to 0.5-90% in terms of capacity, and the blended acid relaxation base material is the target site. It is intended to spray on.

本発明の第３は，第１の発明に係る転炉スラグを用いた酸性緩和工法において，転炉スラグは，堆肥単独及び微生物発酵等のプロセスを経た未分解の草本，木本のチップを可とするバーク系の有機質資材又は極強酸性の酢液に浸して養生することによって生成される腐植土に対して配合割合を容量換算で０．５〜９０％に設定し，配合された酸性緩和基盤材を人力によって播き出して，対象地に残置するようにしたものである。   According to a third aspect of the present invention, in the acid mitigation method using the converter slag according to the first invention, the converter slag can be composted alone or undecomposed herbaceous and woody chips that have undergone a process such as microbial fermentation. The blending ratio is set to 0.5-90% in terms of volume with respect to humus soil produced by immersing it in a bark organic material or extremely acidic vinegar and curing, and blended acid relaxation The base material is sown by human power and left on the target site.

本発明の第４は，第１の発明に係る転炉スラグを用いた酸性緩和工法において，転炉スラグは，堆肥単独及び微生物発酵等のプロセスを経た未分解の草本，木本のチップを可とするバーク系の有機質資材又は極強酸性の酢液に潰して養生することによって生成される腐植土に対して配合割合を容量換算で０．５〜９０％に設定し，配合された酸性緩和基盤材を油圧ショベルで対象地の土壌と混合しながら，当該対象地へ供給するようにしたものである。   According to a fourth aspect of the present invention, in the acid mitigation method using the converter slag according to the first invention, the converter slag can be composted alone or undecomposed grass and wood chips that have undergone a process such as microbial fermentation. The mixing ratio is set to 0.5-90% in terms of volume with respect to the humus soil produced by crushing and curing in a bark organic material or extremely acidic vinegar, and the mixed acid relaxation The base material is mixed with the soil of the target site with a hydraulic excavator and supplied to the target site.

本発明の第５は，第１の発明に係る転炉スラグを用いた酸性緩和工法において，バーク
系有機質資材のバーク堆肥は，Ｃ／Ｎ比で３５以下，有機物含有量７０％以上の資材を用
いることとし，ｐＨ（Ｈ２Ｏ）で２．０〜９．０，電気伝導度を２．０ｍＳ／ｃｍ以下の
値のものを用いるようにしたものである。 The fifth of the present invention, the acidic mitigation method using converter slag according to the first invention, bark compost bark-based organic materials are C / 35 or less N ratio, organic matter content of 70% or more of the material In this case, a pH (H 2 O) of 2.0 to 9.0 and an electric conductivity of 2.0 mS / cm or less are used.

本発明の第６は，第１の発明に係る転炉スラグを用いた酸性緩和工法において，強酸性土壌のｐＨを上昇させる緩衝資材としての転炉スラグは，ｐＨ（Ｈ２Ｏ）で１１．０以上のものを用いるようにしたものである。According to a sixth aspect of the present invention, in the acid mitigation method using the converter slag according to the first invention, the converter slag as a buffer material for increasing the pH of the strongly acidic soil has a pH (H 2 O) of 11. A thing of zero or more is used.

本発明の第７は，第１の発明に係る転炉スラグを用いた酸性緩和工法において，強酸性土壌のｐＨを上昇させる緩衝資材としての転炉スラグは，粒径φ＝５００ｍｍ以下のものを用いるようにしたものである。   In the seventh aspect of the present invention, in the acid mitigation method using the converter slag according to the first invention, the converter slag as a buffer material for raising the pH of the strongly acidic soil has a particle diameter of φ = 500 mm or less. It is intended to be used.

本発明の第８は，第１の発明に係る転炉スラグを用いた酸性緩和工法において，客土に混合する肥料については，強酸性の対象地の土壌の化学性の分析値を用いて陽イオン交換容量に占めるＣａ，Ｍｇ，Ｋ等の塩基量の過不足量に見合った施肥設計を用いるようにしたものである。   According to an eighth aspect of the present invention, in the acid mitigation method using the converter slag according to the first aspect of the present invention, fertilizer to be mixed with the customer soil is positively analyzed using the analytical value of the soil chemistry in the strongly acidic target area. A fertilization design suitable for the excess or deficiency of the amount of base such as Ca, Mg, K, etc. in the ion exchange capacity is used.

本発明の第９は，１の発明に係る転炉スラグを用いた酸性緩和工法において，対象地の
土壌分析結果から，Ｃａ，Ｍｇ，Ｋ等の塩基類を吸着する機能である陽イオン交換容量が
砂丘未熟土となる１０．０ｍｅｑ／１００ｇ以下となる場合には，陽イオン交換容量を高
めるゼオライト系資材を混合するようにしたものである。
The ninth aspect of the present invention is a cation exchange capacity that is a function of adsorbing bases such as Ca, Mg, K, etc., from the soil analysis results of the target site in the acid relaxation method using the converter slag according to the first aspect of the present invention. There when the following 10.0 meq / 100 g as a dune immature soil is obtained so as to mix the zeolitic material to increase the cation exchange capacity.

本発明の第１０は，第１の発明に係る転炉スラグを用いた酸性緩和工法において，強酸性土壌の緩和および植物に有用な資材としての転炉スラグはＴ−Ｆｅが５％以上，Ａｌ２Ｏ３が５％以下，Ｐ２Ｏ５が１％以上のものを用いるようにしたものである。According to a tenth aspect of the present invention, in the acid mitigation method using the converter slag according to the first invention, the converter slag as a material useful for mitigation of strongly acidic soil and plants is 5% or more of T-Fe, Al 2 O 3 is 5% or less and P 2 O 5 is 1% or more.

本発明は上記の構成であることから，次の効果がある。すなわち、土壌ｐＨが著しく低下して強酸性土壌となっている対象地に酸性緩和基盤材を供給して残置させることによって土壌ｐＨが著しく低下して機能不全となっている土壌構造を改善することができる。   Since the present invention is configured as described above, the following effects are obtained. In other words, improving the soil structure where the soil pH is significantly lowered and malfunctioned by supplying the acid mitigation base material to the target site where the soil pH is significantly lowered and becoming strongly acidic soil. Can do.

また，有機質資材と転炉スラグからなる客土に種子や肥料，粘結剤を混合した酸性緩和基盤材を用いることにより，酸性化が進行して機能不全となっている土壌の改良ができ，植生が成育し易い環境へと移行することが期待できる。   In addition, by using acid mitigation base materials that are mixed with seeds, fertilizers, and binders in the customer soil consisting of organic materials and converter slag, it is possible to improve the soil that is malfunctioning due to the progress of acidification. It can be expected to shift to an environment where vegetation is easy to grow.

上記の土壌改良効果の実現は，対象となる強酸性土壌が降雨等の外的ストレスによって流亡し難い環境とすることが可能となる。そして，基材の対象面への残置についてはハイドロシーダ又はモルタル吹付機によるノズル噴射，人力による播き出し，油圧ショベルによる鋤込み混合が実施可能であり，通常の土木工事で利活用されている機械の利用が可能である。   The realization of the above soil improvement effect makes it possible to make the target strongly acidic soil difficult to be washed away by external stress such as rainfall. The substrate can be left on the target surface by nozzle injection with a hydroseeder or mortar sprayer, sowing by human power, and swallowing with a hydraulic excavator. Can be used.

さらに，本発明にあっては，土壌の塩基飽和度を有機質資材に対して転炉スラグの混合量を可変することにより変更できることから，対象地周辺の植生環境に見合った土壌環境とすることが可能となる。   Furthermore, in the present invention, the soil base saturation can be changed by changing the mixing amount of the converter slag with respect to the organic material, so that the soil environment suitable for the vegetation environment around the target site can be obtained. It becomes possible.

本発明の実施工程を示す概略説明図である。It is a schematic explanatory drawing which shows the implementation process of this invention. 本発明の酸性緩和基盤材を対象地に播き出す模式図である。It is a schematic diagram which sows the acidic relaxation base material of this invention on an object ground. 本発明の酸性緩和基盤材を対象地で油圧ショベル等の建設機械を土壌と混合する模式図である。It is a schematic diagram which mixes construction machinery, such as a hydraulic excavator, with soil in the target site for the acid relaxation base material of the present invention.

（１）土壌の団粒化を維持できる土壌環境では，土壌ｐＨが５〜６となるのに比較する，現在の間伐や抜打ち等の森林整備が遅れている森林土壌や酸性硫酸塩土壌等の酸性化し易い土壌環境ではｐＨ４．４以下となってしまい，有機物及び有機物由来の塩類等が流亡して土壌構造が単粒化して砂質化してしまっていることを確認したことにある。
このような環境では，植生の成育が著しく阻害されることから，降雨等の外的ストレスに対しても非常に弱くなっている。
（２）有機物資材であるバーク系堆肥は，樹皮や廃材等を１〜２年程度養生した後に製品化されるので，初期の段階ではｐＨが８程度のアルカリ性となる。
しかし，このような資材単独では，単粒化した土壌粒子を結びつける機能が低いことから強アルカリとなる転炉スラグを用いることによって，土壌の団粒化を図る。
（３）バーク系有機質資材及び転炉スラグは，降雨が連続すると流亡してしまうことが懸念される。このように導入した客土が流亡しないようにするために酢酸ビニール系粘結剤や中性の無機系固化剤を酢酸ビニール系では，１ｍ３に対して１ｋｇ，無機系固化剤では１０〜２０ｋｇを添加することで問題を解決している。
（４）粒径がφ＝１０ｍｍ以上やφ＝２ｍｍ以下の転炉スラグでは，基材の混合時に吹付け機内で詰まるので，粒径についてはφ＝２〜５ｍｍ程度のものを用いることで解決している。なお，吹付け用ノズルを用いないで対象地に載置する施工においては、最大５００ｍｍ以下大径塊のものを用いることができる。
（５）転炉スラグの保有する成分で植物にとって栄養素となる成分としてＴ−Ｆｅ，Ｐ２Ｏ５がある。転炉スラグが保有するＣａＯ量とのバランスより植物に供給できる栄養素については，転炉スラグ成分でＴ−Ｆｅが火成岩の平均の３．１％（京都大学学術出版会：土とは何だろうか？）よりも高５％以上Ｐ２Ｏ５が火成岩の平均の０．３％（京都大学学術出版会：土とは何だろうか？）よりも高い１％以上保有することが必要である。また，栄養素であるＰ２Ｏ５の植物への吸収を阻害するＡｌ２Ｏ３は，堆積岩である砂岩平均の４．８％（京都大学学術出版会：土とは何だろうか？）となる５％以下を保有する転炉スラグが必要である。
（６）土壌の養分を吸着する機能である陽イオン交換容量の値が，砂丘未熟土３．０〜１０．０ｍｅｑ／１００ｇ（農業技術大系土壌施肥編 第４巻 土壌診断・生育診断）に相当する貧養分保持状態の１０．０ｍｅｑ／１００ｇ以下となった場合には，陽イオン交換容量を高めるゼオライト系の資材を混合する。(1) In soil environments where soil agglomeration can be maintained, compared to soil pH of 5-6, such as forest soil or acid sulfate soil where forest maintenance such as current thinning and sampling is delayed In the soil environment that is easily acidified, the pH is 4.4 or less, and it has been confirmed that organic matter and salts derived from the organic matter have been washed away and the soil structure has become single grained and sandy.
In such an environment, the growth of vegetation is significantly hindered, making it very vulnerable to external stress such as rainfall.
(2) Since bark compost, which is an organic material, is commercialized after curing bark, waste wood, etc. for about 1 to 2 years, it becomes alkaline with a pH of about 8 at the initial stage.
However, such a material alone has a low function of linking the single-grained soil particles, so the use of converter slag, which is a strong alkali, aims to aggregate the soil.
(3) There is concern that bark organic materials and converter slag will be washed away if rainfall continues. In order to prevent the introduced soil from flowing away, vinyl acetate binder or neutral inorganic solidifying agent is 1 kg per 1 m 3 for vinyl acetate and 10-20 kg for inorganic solidifying agent. The problem is solved by adding.
(4) In converter slag having a particle size of φ = 10 mm or more or φ = 2 mm or less, it will be clogged in the spraying machine when mixing the base materials. doing. In addition, in the construction placed on the target site without using the spray nozzle, a large-diameter block having a maximum diameter of 500 mm or less can be used.
(5) T-Fe, P 2 O 5 is a component of converter slag that is a nutrient for plants. Regarding nutrients that can be supplied to plants based on the balance with the amount of CaO held by converter slag, T-Fe is 3.1% of the average of igneous rocks in the converter slag component (Kyoto University Academic Press: What is soil? ? high more than 5% P 2 O 5 is 0.3% of the average of igneous rock (Kyoto University Press than): it is necessary to possess What would) more than 1% higher than the soil?. In addition, Al 2 O 3 which inhibits the absorption of P 2 O 5 nutrients into plants is 4.8% of the average sandstone sedimentary rock (Kyoto University Academic Press: What is soil?) Converter slag with less than 5% is required.
(6) The value of the cation exchange capacity, which is a function of adsorbing nutrients in the soil, is 3.0 to 10.0 meq / 100 g of dune immature soil (Volume 4 soil diagnosis / growth diagnosis). When the corresponding poor nutrient retention state is 10.0 meq / 100 g or less, a zeolitic material for increasing the cation exchange capacity is mixed.

次に，本発明の実施例を説明する。図１において，１は酸性緩和基盤材，２は客土，３は転炉スラグ，４はバーク系の有機質資材，５は有機質部材である。また，６は人工腐植土，７は添加材であり、種子８，肥料９，粘結剤１０とからなる。
上記の酸性緩和基盤材１は，客土２と添加材７を混合したものである。Next, examples of the present invention will be described. In FIG. 1, 1 is an acid mitigation base material, 2 is a guest soil, 3 is a converter slag, 4 is a bark-based organic material, and 5 is an organic member. 6 is artificial humus, 7 is an additive, and consists of seed 8, fertilizer 9, and binder 10.
The acid relaxation base material 1 is a mixture of the soil 2 and the additive 7.

また、客土２は転炉スラグ３と，バーク堆肥単独のもの又はバーク系堆肥と微生物発酵等のプロセスを経た未分解の草本，バーク堆肥単独のもの又はバーク堆肥と微生物発酵等のプロセスを経ていない未分解の草本又は木本であるチップとからなる有機質部材５と，人工腐植土６とを混合したものである。 In addition, the customer soil 2 is converted into the converter slag 3 and the bark compost alone or undegraded herb which has undergone the process such as bark compost and microbial fermentation , the bark compost alone or the process such as bark compost and microbial fermentation. the organic electrolyte member 5 made of a chip and an undecomposed herbaceous or woody that not is obtained by mixing the artificial humus 6.

上記の有機質資材４は，バーク堆肥単独のものと，又はバーク堆肥と微生物発酵等のプロセスを経た未分解の草本，木本のチップ,バーク堆肥単独のもの又はバーク堆肥と微生物発酵等のプロセスを経ていない未分解の草本又は木本であり,これと有機質部材５と人工腐植土６を混合したものである。上記バーク堆肥は，Ｃ／Ｎ比３５以下，有機質含有量７０％以上の資材を用いることとし，具体的にはバーク堆肥単独及び未分解の草本，木本のチップ等を用いる。そして，ｐＨ（Ｈ２Ｏ）で５．５〜７．５,電気伝導度が０．９ｍＳ／ｃｍ以下の値のものを利活用する。５は転炉スラグであり，ｐＨ（Ｈ２Ｏ）で１１．０以上の値のものを利活用する。
The above organic material 4 can be either a bark compost alone or an undegraded herbaceous, wood chip, bark compost alone or a process such as bark compost and microbial fermentation. It is an undegraded herb or wood which has not passed, and is a mixture of this, organic material 5 and artificial humus 6. The bark compost is made of a material having a C / N ratio of 35 or less and an organic content of 70% or more. Specifically, bark compost alone, undecomposed herbaceous, woody chips or the like are used. Then, in pH (H 2 O) 5.5~7.5, electrical conductivity is utilization of the following values 0.9 mS / cm. Reference numeral 5 denotes converter slag, which has a pH (H 2 O) value of 11.0 or more.

また，人工腐植土６は，極強酸性の酢液にバーク堆肥または未分解の草本，木本チップを浸漬して養生することによって生成されるものである。   Moreover, the artificial humus 6 is produced by immersing bark compost or undegraded herbaceous and wood chips in a very acidic vinegar and curing.

客土２に混合する添加材７は，市販又は対象地周辺で植物から直接採取したもの及び対象地周辺で植物から直接採取したもの及び対象地周辺の土地で休眠しているものを用いる草本，木本の種子８，肥料９，粘結剤１０とからなる。   Additives 7 to be mixed with the customer soil 2 are herbs that are commercially available or collected directly from plants around the target area, and those collected directly from plants around the target area and those that are dormant on the land around the target area, It consists of woody seed 8, fertilizer 9, and binder 10.

１１は客土を酸性緩和基盤材の吹付機に搬送するベルトコンベア，１２は発電機，１３はコンプレツサ，１４は酸性緩和基盤材１の吹付機であり，ハイドロシーダ又はモルタル吹付機の圧送型ノズル噴射式を用いるものとする。１５は水汲み上げポンプ，１６は水槽，１７は配電盤，１８は酸性緩和基盤材１を強酸性対象地Ｇに吹き付ける吹付機１５の噴射ノズルを示す。図３で１９は酸性緩和基盤材１を対象地Ｇの土壌を鋤込んで混合するための油圧ショベルを示す。   11 is a belt conveyor for transporting the soil to the acid relaxation base material spraying machine, 12 is a generator, 13 is a compressor, 14 is a spraying machine for the acid relaxation base material 1, and is a hydrofeeder or mortar spraying type nozzle. The jet type shall be used. 15 is a water pumping pump, 16 is a water tank, 17 is a switchboard, and 18 is an injection nozzle of a sprayer 15 that sprays the acid relaxation base material 1 to the strongly acidic target site G. In FIG. 3, reference numeral 19 denotes a hydraulic excavator for mixing the acidic relaxation base material 1 with the soil of the target ground G mixed therein.

「具体的な施工例」
（１）転炉スラグ３とバーク系堆肥等の有機質部材５と人工腐植土６からなる有機質資材４を混合して客土２とし，さらに，これに種子７，肥料８，粘結剤９からなる添加剤７を加えて酸性緩和基盤材１とする。
（２）酸性緩和基盤材１をハイドロシーダ又はモルタル吹付機１４を使って対象地Ｇにノズル噴射にて吹き付ける。
（３）強酸性対象地Ｇの目的に応じて厚さ１．０〜５．０ｃｍ程度に吹き付けて酸性緩和基盤層Ａを形成する。
なお、粒径が最大５００ｍｍ以下で吹付け用ノズルで吹付けられない程の大径塊の酸性緩和基盤材１は手作業で対象地Ｇに適宜間隔を置いて載置する。"Specific construction examples"
(1) Mixing organic material 4 consisting of converter slag 3, organic material 5 such as bark-based compost and artificial humus soil 6 to make the soil 2 further, seed 7, fertilizer 8 and binder 9 Additive 7 is added to make the acid relaxation base material 1.
(2) The acidic relaxation base material 1 is sprayed onto the target ground G by nozzle injection using a hydroseeder or a mortar sprayer 14.
(3) The acidic relaxation base layer A is formed by spraying to a thickness of about 1.0 to 5.0 cm according to the purpose of the strongly acidic target site G.
In addition, the acid relaxation base material 1 of a large diameter lump that has a particle diameter of 500 mm or less and cannot be sprayed by the spray nozzle is manually placed on the target site G at appropriate intervals.

本発明は，荒廃した森林および酸性硫酸塩土壌であることから強酸性土壌となって植生の侵入が起こらない箇所に対して，転炉スラグを投与することによって緩効的に持続的なアルカリ供給を行うこと行い，自然復元することが期待できる。   Since the present invention is a devastated forest and acid sulfate soil, it is a strong acid soil, and the area where the invasion of vegetation does not occur is administered slowly and continuously by supplying converter slag. Can be expected to restore nature.

１……酸性緩和基盤材
２……客土
３……転炉スラグ
４……バーク系の有機質資材
５……有機質部材（バーク堆肥・腐植土）
６……人工腐植土
７……添加材
８……種子
９……肥料
１０……粘結剤
１１……コンベア
１２……発電機
１３……コンプレッサ
１４……酸性緩和基盤材の吹付機
１５……水汲み上げポンプ
１６……水槽
１７……配電盤
１８……噴射ノズ
１９……油圧ショベル
Ｇ……対象地
１８……噴射ノズ
１９……油圧ショベル
Ｇ……対象地1 ... Acid mitigation base material 2 ... Soil 3 ... Converter slag 4 ... Bark organic material 5 ... Organic material (bark compost / humus soil)
6 ... Artificial humus 7 ... Additives 8 ... Seeds 9 ... Fertilizer 10 ... Binder 11 ... Conveyor 12 ... Generator 13 ... Compressor 14 ... Acidic relaxation base material spraying machine 15 ... ... water pumping pump 16 ... water tank 17 ... switchboard 18 ... injection nozzle 19 ... hydraulic excavator G ... target 18 ... injection nose 19 ... hydraulic excavator G ... target

Claims (10)

転炉スラグと微生物発酵のプロセスを経たバーク堆肥単独または，このバーク堆肥に未分解の草本，木本のチップの少なくとも一種を加えたバーク系の有機質資材と，当該バーク堆肥または未分解の草本,木本チップをｐＨ４．４以下の極強酸性の酢液に浸して養生することによって腐植含有量が３．０％以上に生成される腐植土を混合した客土に植物の種子や肥料及び粘結剤を加えたものを酸性緩和基盤材とし，当該酸性緩和基盤材を土壌ｐＨが低下して強酸性土壌となっている対象地に供給することで酸性を緩和する転炉スラグを用いた酸性緩和工法。 Bark compost that has undergone the process of converter slag and microbial fermentation alone, or undegraded herbaceous to this bark compost, bark organic material with at least one kind of wood chip, and the bark compost or undegraded herbaceous, Kimoto chip pH4.4 following poles strongly acidic vinegar soaked plant seeds and fertilizer and the customer soil mixed with humus soil humus content is generated more than 3.0% by curing by A converter slag that relaxes acidity by using a binder added as an acid mitigation base material and supplying the acid mitigation base material to the target site where the soil pH is lowered and the soil is strongly acidic is used. Acid relaxation method. 有機質資材と腐植土に対する転炉スラグの配合割合を容量換算で０．５〜９０％に設定し，配合された酸性緩和基盤材を吹付機内で混合して対象地への吹き付けを行うようにした請求項１記載の転炉スラグを用いた酸性緩和工法。The ratio of converter slag to organic material and humus soil was set to 0.5-90% in terms of capacity, and the blended acidic mitigation base material was mixed in the sprayer and sprayed onto the target area. An acid relaxation method using the converter slag according to claim 1. 有機質資材と腐植土に対する転炉スラグの配合割合を容量換算で０．５〜９０％に設定し，配合された酸性緩和基盤材を人力によって播き出して、当該対象地へ供給する請求項１記載の転炉スラグを用いた酸性緩和工法。The mixing ratio of the converter slag to the organic material and the humus soil is set to 0.5 to 90% in terms of capacity, and the mixed acidic relaxation base material is sown by human power and supplied to the target site. Acid relaxation method using the converter slag. 有機質資材と腐植土に対する転炉スラグの配合割合を容量換算で０．５〜９０％に設定し，配合された酸性緩和基盤材を油圧ショベルで対象地の対象土壌と混合しながら、当該対象地へ供給する請求項１記載の転炉スラグを用いた酸性緩和工法。The mixing ratio of converter slag to organic material and humus soil is set to 0.5 to 90% in terms of capacity, and the mixed acid mitigation base material is mixed with the target soil of the target area with a hydraulic excavator, and the target site An acid relaxation method using the converter slag according to claim 1 to be supplied. バーク系の有機質資材は，Ｃ／Ｎ比で３５以下、有機物含有量７０％以上の資材を用いることとし，ｐＨ（Ｈ２Ｏ）で２．０〜９．０，電気伝導度が２．０ｍS／ｃｍ以下の値のものを用いた請求項１から請求項４のいずれか１項に記載の転炉スラグを用いた酸性緩和工法。 Bark-based organic materials are those with a C / N ratio of 35 or less and an organic content of 70% or more, pH (H 2 O) of 2.0 to 9.0 , and electrical conductivity of 2.0 mS. The acid relaxation construction method using the converter slag of any one of Claims 1-4 using the thing of the value below / cm. 強酸性土壌のｐＨを上昇させる緩衝資材としての転炉スラグは，ｐＨ（Ｈ２Ｏ）で１１．０以上のものを用いた請求項１から請求項５のいずれか１項に記載の転炉スラグを用いた酸性緩和工法。 The converter slag according to any one of claims 1 to 5, wherein the converter slag as a buffer material for increasing the pH of the strongly acidic soil has a pH (H 2 O) of 11.0 or more. Acid relaxation method using slag. 森林および強酸性土壌のｐＨを上昇させる緩衝資材としての転炉スラグは，粒径φ＝５００ｍｍ以下のものを用いた請求項１から請求項５のいずれか１項に記載の転炉スラグを用いた酸性緩和工法。 The converter slag according to any one of claims 1 to 5, wherein the converter slag as a buffer material for increasing the pH of forests and strongly acidic soils has a particle diameter of φ = 500 mm or less. The acid relaxation method. 客土に混合する肥料については，強酸性の対象地の土壌の化学性の分析値を用いて陽イオン交換容量に占めるＣa，Ｍg，Ｋの塩基量の過不足量に見合った施肥設計を用いた請求項１から請求項７のいずれか１項に記載の転炉スラグを用いた酸性緩和工法。 For fertilizer to be mixed with the soil, use fertilizer design that matches the excess or deficiency of Ca, Mg, K base amount in the cation exchange capacity using the analytical value of soil chemistry in the target area of strong acidity. An acid relaxation method using the converter slag according to any one of claims 1 to 7 . 対象地の土壌分析結果から，Ｃa，Ｍg，Ｋの塩基類を吸着する機能である陽イオン交換容量が対象となる土壌の陽イオン交換容量の値が１０ｍｅｑ／１００ｇ以下の砂丘未熟土となる１０．０ｍｅｑ／１００ｇ以下となる場合には、陽イオン交換容量を高めるゼオライト系資材を混合する請求項１から請求項８のいずれか１項に記載の転炉スラグを用いた酸性緩和工法。 From the soil analysis results of the target site, the cation exchange capacity, which is a function of adsorbing Ca, Mg, and K bases, becomes a dune immature soil with a cation exchange capacity of 10 meq / 100 g or less. The acid relaxation construction method using the converter slag according to any one of claims 1 to 8, wherein a zeolitic material for increasing the cation exchange capacity is mixed when it becomes 0.0 meq / 100 g or less. Ｔ−Ｆeが５％以上，Ａｌ２Ｏ３が５％以下，Ｐ２Ｏ５が１．０％以上のものを用いる請求項１から請求項９のいずれか１項に記載の転炉スラグを用いた酸性緩和工法。 T-Fe of 5% or more, Al 2 O 3 is 5%, the converter slag according to any one of claims 1 to 9 in which P 2 O 5 is used as at least 1.0% The acid relaxation method used.
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JPH0196085A (en) * 1987-10-09 1989-04-14 Nishimura Fukoen:Kk Multi material
JPH01168791A (en) * 1987-12-25 1989-07-04 Nippon Steel Chem Co Ltd Soil conditioner for grass
JPH1098938A (en) * 1996-09-30 1998-04-21 Giken Kogyo Kk Environmental safeguard type afforestation material
JPH1161119A (en) * 1997-08-21 1999-03-05 Sumitomo Metal Ind Ltd Improver for acidic heavy clayey soil
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