JPH07157761A - Soil stabilization treating material and method for soil stabilization treatment - Google Patents
Soil stabilization treating material and method for soil stabilization treatmentInfo
- Publication number
- JPH07157761A JPH07157761A JP34463393A JP34463393A JPH07157761A JP H07157761 A JPH07157761 A JP H07157761A JP 34463393 A JP34463393 A JP 34463393A JP 34463393 A JP34463393 A JP 34463393A JP H07157761 A JPH07157761 A JP H07157761A
- Authority
- JP
- Japan
- Prior art keywords
- soil
- gypsum board
- soil stabilization
- stabilization treatment
- cement
- 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
- 239000000463 material Substances 0.000 title claims abstract description 43
- 239000002689 soil Substances 0.000 title claims abstract description 42
- 230000006641 stabilisation Effects 0.000 title claims abstract description 30
- 238000011105 stabilization Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000010440 gypsum Substances 0.000 claims abstract description 46
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 46
- 239000002699 waste material Substances 0.000 claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 6
- 239000010881 fly ash Substances 0.000 claims abstract description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 4
- 239000004571 lime Substances 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 12
- 239000000843 powder Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 4
- 239000004927 clay Substances 0.000 abstract description 2
- 238000007613 slurry method Methods 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 description 10
- 238000010276 construction Methods 0.000 description 6
- 150000004683 dihydrates Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 239000010812 mixed waste Substances 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000003583 soil stabilizing agent Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、建設廃棄物の一つであ
る石膏ボード廃材を有効に利用する土質安定処理材及び
土質安定処理工法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil stabilization treatment material and a soil stabilization treatment method for effectively utilizing a gypsum board waste material which is one of construction wastes.
【０００２】[0002]
【従来の技術】石膏ボード廃材の利用法としては、農業
用の土壌添加材、軽量コンクリート、路盤安定材等への
再利用可能性が指摘されているが、抽象的概念のみに留
まり、技術的な検討がなされないまま、一部で石膏ボー
ド用原料として利用されているにすぎなかった。しか
し、建設現場で発生した廃材については回収・運搬コス
トがかかる上に、石膏ボード製造原料としての再利用率
に限界があり、大半が混合廃棄物として処分されてい
る。BACKGROUND OF THE INVENTION It has been pointed out that the waste material of gypsum board can be reused as a soil additive material for agriculture, lightweight concrete, roadbed stabilizer, etc. It was only partially used as a raw material for gypsum board, without being studied. However, the waste materials generated at the construction site are expensive to collect and transport, and there is a limit to the reuse rate as a raw material for producing gypsum board, and most of them are disposed of as mixed waste.
【０００３】一方、石膏そのものは、排脱石膏の土質安
定処理材への適用に見られるように、セメント、フライ
アッシュ、高炉スラグ等とともに土質安定処理材の構成
材料として、その有効性については、多くの実施例が存
在している。On the other hand, gypsum itself, together with cement, fly ash, blast furnace slag, etc., as a constituent material of the soil stabilization treatment material, as is found in the application of waste desorption gypsum, to the soil stabilization treatment material There are many examples.
【０００４】石膏ボード廃材は、年間約数拾万トンの発
生があるとされており、建設系混合廃棄物として処分さ
れているのが実情であり、これを軟弱地盤等の土質安定
処理に用いることは、建設廃材の処理・有効利用の点で
意義が大きい。しかし、石膏ボード廃材は、単に石膏の
みではなく、紙の混在が避けられない上に、紙と石膏の
接着に有機物からなる接着剤が使用されていることもあ
り、一般にはセメント等の凝結遅延を伴うため、土質安
定処理に用いる材料としては好ましくないと考えられて
おり、これまでに研究あるいは実施事例がなかった。It is said that about several ten thousand tons of gypsum board waste materials are generated annually, and the fact is that they are actually disposed of as mixed waste of construction, and this is used for soil stabilization treatment of soft ground and the like. This is significant in terms of processing and effective utilization of construction waste materials. However, waste gypsum board is not just gypsum, it is inevitable that paper is mixed, and an adhesive made of an organic substance is used to bond the paper and gypsum. Therefore, it is considered to be unsuitable as a material for soil stabilization, and there have been no studies or implementation cases so far.
【０００５】[0005]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、石膏以外の不純物を含んでいる石膏ボード
廃材を、土質安定処理に用いるための利用方法を見いだ
すことにある。The problem to be solved by the present invention is to find a method of using a gypsum board waste material containing impurities other than gypsum for soil stabilization.
【０００６】[0006]
【課題を解決するための手段】土質安定処理に用いられ
る石膏には、安定処理の対象により適切な石膏の形態が
ある。石膏ボード廃材に含まれる石膏の種類ならびに結
晶構造を調査した結果、９０％以上が二水石膏であり、
火山灰質粘性土や一般の沖積粘土・シルトの土質安定材
として使用可能な材料であることを見い出した。The gypsum used for soil stabilization has a suitable form of gypsum depending on the object of stabilization. As a result of investigating the type and crystal structure of gypsum contained in the waste gypsum board, 90% or more is gypsum dihydrate,
We have found that it can be used as a soil stabilizer for volcanic ash cohesive soil and general alluvial clay and silt.
【０００７】次に、石膏ボード廃材に含まれる紙及び接
着材成分が土質安定材の性能に及ぼす影響を調べた結
果、石膏ボード中に含まれる紙の含有量は重量で１０％
以下であり、この程度の量であれば、セメント系材料へ
の添加率を適切な量とすることにより、その硬化を阻害
しないことが判明した。Next, as a result of investigating the influence of the paper and adhesive components contained in the waste gypsum board on the performance of the soil stabilizer, the content of the paper contained in the gypsum board was 10% by weight.
It was found to be below, and if the amount is in this range, the addition rate to the cement-based material is set to an appropriate amount, and it is found that the hardening thereof is not hindered.
【０００８】すなわち、石膏ボード廃材の粉砕物１〜５
０重量部に対し、セメントを５０〜９９重量部添加し、
必要に応じて石灰、フライアッシュ、高炉スラグの一種
または複数種を組み合わせて添加することにより、普通
ポルトランドセメントを上回る安定処理効果を得られる
ことが判明した。That is, crushed products of gypsum board waste materials 1 to 5
50 to 99 parts by weight of cement is added to 0 parts by weight,
It has been found that a stabilizing treatment effect superior to that of ordinary Portland cement can be obtained by adding one or more kinds of lime, fly ash, and blast furnace slag in combination as required.
【０００９】上記石膏ボード廃材の粉砕時における最大
粒径、篩分け寸法は、土質安定効果の観点からは、細か
い方がよいが、現実に有効利用をはかる経済性を考えれ
ば、粗い方が扱いやすい。この点については適用する安
定処理工法が粉体混合方式の場合、多少の粒度の粗いも
の、すなわち２０ｍｍ以下のものでも可能であるが、ス
ラリー方式の場合は、分離しない範囲の粒度、すなわち
５ｍｍ以下が必要である。The maximum particle size and sieving size at the time of crushing the waste gypsum board material are preferably fine from the viewpoint of the effect of soil stability, but in view of the economical efficiency of effective utilization, the coarser one is treated. Cheap. Regarding this point, when the stabilization treatment method to be applied is the powder mixing method, it is possible to use a slightly coarse particle size, that is, 20 mm or less, but in the case of the slurry method, the particle size in the range that does not separate, that is, 5 mm or less is necessary.
【００１０】[0010]
【作用】本発明によれば、石膏ボード廃材を利用して土
質安定処理を行なうことができる。According to the present invention, the soil stabilization treatment can be performed by utilizing the gypsum board waste material.
【００１１】[0011]
（実験例１）カッタータイプのボード粉砕機（２５ｍｍ
間隔の複数のカッターを備えたもの）により、２５ｍｍ
以下に破砕した石膏ボード廃材（紙混入率６．４重量
％）をスクリューフィーダータイプの搬送機で篩に導入
し、各種の篩目ごとに篩通過分の体積専有率及びその中
の紙の混入率を求めた。この結果を表１に示す。(Experimental Example 1) Cutter type board crusher (25 mm
25 mm by means of those equipped with multiple cutters with intervals
The crushed gypsum board waste material (paper mixing ratio of 6.4% by weight) was introduced into the sieve with a screw feeder type conveyor, and the volume occupation rate of the sieve passing by each sieve mesh and the mixing of the paper in it I asked for the rate. The results are shown in Table 1.
【００１２】[0012]
【表１】 [Table 1]
【００１３】以上の結果より、篩目を細かくすることに
より紙の含有率を１％以下のレベルに抑えることが可能
であるが、篩目を細かくすることにより、廃棄物として
処分を要する量が増加することがわかる。From the above results, it is possible to suppress the paper content to a level of 1% or less by making the sieve mesh finer, but by making the sieve mesh finer, the amount that needs to be disposed as waste is reduced. You can see that it will increase.
【００１４】つぎに、これらの材料を用いて、土との粉
体混合ならびにスラリー混合への適用性を検討したとこ
ろ、粉体混合の場合は２０ｍｍ以下に粉砕したものや２
０ｍｍ以下の篩を通過したものが適切であり、セメント
単独の場合よりも粒塊状のボード廃材の方が混合性で優
れていた。一方スラリー混合する場合、沈降現象が生
じ、少なくとも５ｍｍ以下に粉砕したものや、５ｍｍ以
下の篩を通過させたものでなければならないことが分か
った。Next, using these materials, the applicability to powder mixing with soil and slurry mixing was examined, and in the case of powder mixing, those crushed to 20 mm or less or 2
Those that passed through a sieve with a size of 0 mm or less were suitable, and the agglomerated board waste material was superior in mixability as compared with the case of cement alone. On the other hand, when the slurry was mixed, it was found that a sedimentation phenomenon occurred, and that it must be crushed to at least 5 mm or less, or passed through a sieve of 5 mm or less.
【００１５】（実験例２）千葉県佐倉産の関東ローム
（自然含水比１１２％，液性限界１２２％，塑性限界３
７％）に対し、表２に示す安定処理材を作製し、試料土
乾燥重量に対して３０％添加した。この安定処理土の一
軸圧縮強さの測定を土質工学会基準（ＪＳＦＴ ５１
１）に準拠して実施した。供試体の作製は、１．５ｋｇ
のランマを２０ｃｍ落下させ、３層１２回締め固めてお
こなった。この結果を表３に示す。(Experimental Example 2) Kanto loam from Sakura, Chiba Prefecture (natural water content 112%, liquid limit 122%, plastic limit 3
7%), the stabilizing treatment material shown in Table 2 was prepared, and 30% was added to the dry weight of the sample soil. The uniaxial compressive strength of this stabilized soil was measured according to the Japan Society of Geotechnical Standards (JSFT 51
It carried out according to 1). 1.5 kg of test piece
The rammer was dropped by 20 cm and compacted 12 times in 3 layers. The results are shown in Table 3.
【００１６】[0016]
【表２】 [Table 2]
【００１７】[0017]
【表３】 [Table 3]
【００１８】この結果、セメントに石膏ボード廃材を添
加した安定処理材は、普通ポルトランドセメント単独に
比べて、強度発現が大きく、二水石膏添加のものと比較
しても、同等以上の強度を示すことが判明した。また、
利用限界としては、石膏ボード廃材も石膏と同様にセメ
ントに対して過剰に添加すると固化体の膨脹を生じるた
め、石膏ボード廃材が土質安定材中に占める割合は５０
重量部％以下で好ましくは２０〜３０重量部％がよいと
考えられる。As a result, the stabilized material obtained by adding the waste gypsum board material to the cement has a greater strength development than the ordinary Portland cement alone, and exhibits a strength equal to or higher than that of the addition of gypsum dihydrate. It has been found. Also,
As for the utilization limit, since the waste of gypsum board, like gypsum, causes expansion of the solidified body when added excessively to cement, the ratio of waste gypsum board to the soil stabilization material is 50%.
It is considered that the content is preferably not more than 20% by weight and preferably 20 to 30% by weight.
【００１９】本実験で使用した石膏ボード廃材は、新材
の切断片を用いたものであり、一部半水石膏を含んでい
るため、比較例として用いた二水石膏よりも若干高い強
度を示したものと考えられる。また、解体工事における
古い石膏ボードを用いた場合は、表面化粧材等の影響も
あり、上記実験例より低い強度を示したが、セメントに
比べて同等以上の強度特性を有していた。The gypsum board waste material used in this experiment uses a cut piece of a new material and partially contains hemihydrate gypsum, and therefore has a slightly higher strength than the dihydrate gypsum used as a comparative example. It is considered to have been shown. Further, when the old gypsum board used in the dismantling work was used, the strength was lower than that of the above experimental example due to the influence of the surface decorative material and the like, but the strength characteristics were equal to or higher than those of cement.
【００２０】なお、表面化粧材等の影響が大きい場合、
表面化粧材を適当に除去すれば、強度低下を防止するこ
とができ、その方法としては、粉砕の前後に通常の方法
で除去するだけでなく、篩目を小さくすることでも良
い。When the influence of the surface decorative material is large,
By appropriately removing the surface decorative material, it is possible to prevent a decrease in strength. As a method for this, not only can it be removed by a usual method before and after crushing, but also the mesh size can be reduced.
【００２１】（実験例３）石膏ボード廃材中の紙の含有
量が固化性能に与える影響を調べる目的で、表４に示す
配合で、セメントと二水石膏（実験例２と同じもの）に
パルプを添加した固化材を用いて、安定処理材／水比を
１．０とした材料スラリーで関東ローム（実験例２と同
じ試料土）に試料土乾燥重量の３０％を添加して、固化
強度を調べた。(Experimental Example 3) For the purpose of investigating the influence of the content of paper in the waste material of gypsum board on the solidifying performance, pulp was mixed with cement and dihydrate gypsum (the same as in Experimental Example 2) with the composition shown in Table 4. 30% of the dry weight of the sample soil was added to the Kanto loam (the same sample soil as in Experimental Example 2) in a material slurry in which the stabilizing material / water ratio was 1.0 using the solidifying material containing I checked.
【００２２】[0022]
【表４】 [Table 4]
【００２３】この結果、パルプ量として、石膏の１０％
程度の量であれば、安定処理後の強度に影響を与えない
ことが分かる。一方、石膏ボード中に含まれる紙の量
は、３〜７％程度であるため安定処理材として用いる場
合に問題のない量と考えられる。また、スラリーとして
添加しても、特にパルプを用いない安定処理材より強度
が劣ることもなく、このような使い方で、表層安定処理
のみならず深層混合処理による土質安定処理工法にも適
用可能なことが示された。As a result, the amount of pulp is 10% of gypsum.
It can be seen that a moderate amount does not affect the strength after stabilizing treatment. On the other hand, since the amount of paper contained in the gypsum board is about 3 to 7%, it is considered that there is no problem when used as a stabilizing agent. In addition, even when added as a slurry, the strength is not inferior to that of the stabilizing material that does not use pulp, and in this way, it can be applied not only to the surface stabilization treatment but also to the soil stabilization treatment method by deep layer mixing treatment. Was shown.
【００２４】（実験例４）表５に示す安定処理材を作製
して、埼玉県大宮産の高有機質土（含水比２０６％，湿
潤密度１．２１６ｇ／ｃｍ３，有機物含有量２２．８
％）に対して用い、安定処理土の一軸圧縮強さを求め
た。混合方法は、安定処理材／水比１．０でスラリー状
態として、安定処理材の添加量は１５０ｋｇ／ｍ３とし
た。(Experimental Example 4) Stabilized materials shown in Table 5 were prepared to produce a high organic soil (water content 206%, wet density 1.216 g / cm 3 , organic matter content 22.8 from Omiya, Saitama Prefecture.
%) To obtain the uniaxial compressive strength of stabilized soil. The mixing method was such that the stabilizing material / water ratio was 1.0 and the slurry was used, and the amount of the stabilizing material added was 150 kg / m 3 .
【００２５】[0025]
【表５】 [Table 5]
【００２６】本実験例では、普通セメントと石膏ボード
廃材に高炉水砕スラグを添加した材料が、有機質土に対
して、有効な安定処理効果を示すことが分かったが、同
様に一般に土質安定材料として利用されている石灰、フ
ライアッシュについても一種あるいは複数種の組み合わ
せで有効に機能することも確認された。In this experimental example, it was found that the material obtained by adding granulated blast furnace slag to ordinary cement and gypsum board waste material exhibited an effective stabilizing effect on organic soil. It was also confirmed that lime and fly ash, which are used as such, function effectively with one kind or a combination of plural kinds.
【００２７】（実施例１）関東ローム（自然含水比１０
２％）の路床改良を目的として、実験例１の１５ｍｍ篩
を通過した石膏ボード廃材粉砕物（０．６ｍｍ以下５
０．３％）３０重量％と普通セメント７０重量％とを混
合した安定処理材を用いて、以下に述べる方法で土と粉
体混合を実施した。安定処理材は対象土１ｍ３あたり２
２０ｋｇの添加となるように対象地盤上に散布し、バッ
クホウで混合後、一層の仕上がり厚２０ｃｍとしてタイ
ヤローラーで転圧し、合計６０ｃｍ厚の安定処理を施し
た。施工後７日経過時に、現場ＣＢＲを測定したとこ
ろ、安定処理前２以下であったものが１６〜２５になっ
ており、十分な改良効果を得られることが分かった。(Example 1) Kanto loam (natural water content 10
2%) for the purpose of improving the roadbed, the gypsum board waste material pulverized product (0.6 mm or less 5) that passed through the 15 mm sieve of Experimental Example 1.
(0.3%) 30% by weight and 70% by weight of ordinary cement were used to mix the soil and the powder by the method described below using a stabilizing material. Stabilization material is 2 per 1m 3 of target soil
20 kg was added to the target ground, and after mixing with a backhoe, a final thickness of 20 cm was obtained and rolling was performed with a tire roller to perform a stabilization treatment for a total thickness of 60 cm. When 7 days passed after the construction, the on-site CBR was measured, and it was 16 to 25 that was 2 or less before the stabilization treatment, and it was found that a sufficient improvement effect could be obtained.
【００２８】（実施例２）地盤の沈下・すべり破壊防止
を目的に、高有機質土（実験例４と同じ対象土）の改良
を深層攪拌工法で実施するに際して、実験例１の５ｍｍ
篩を通過した石膏ボード廃材粉砕物（０．６ｍｍ以下８
７％）２０重量％、普通セメント４０重量％と高炉水砕
スラグ（ブレーン比表面積４２００ｃｍ２／ｇ）４０重
量％とを混合した安定処理材を用いてスラリー混合によ
る安定処理試験を実施した。安定処理材は、対象土１ｍ
３あたり３００ｋｇの割合で添加して、二軸の攪拌羽根
を装着した深層混合処理機を用いて、Ｇ．Ｌ−８〜−１
ｍの７ｍ厚を改良した。なお、安定処理材スラリーを作
製するミキサー吐出口には、粗粒物を除去する目的で
２．５ｍｍメッシュの金網を設置した。施工後２８日経
過時に、安定処理部のボーリングを実施し、コア強度の
測定を実施したところ、２．５〜７．６ｋｇ／ｃｍ２の
一軸圧縮強さを示すことが確認され、十分な強度を有す
ることが判明した。(Example 2) In order to prevent subsidence and slip failure of the ground, improvement of high organic soil (the same target soil as that of Experimental Example 4) was carried out by the deep agitation method, and 5 mm of Experimental Example 1 was used.
Gypsum board waste material crushed through the sieve (0.6 mm or less 8
7%), 20% by weight, 40% by weight of ordinary cement and 40% by weight of granulated blast furnace slag (4200 cm 2 / g of Blaine specific surface area) were used to carry out a stability treatment test by slurry mixing. Stabilization material is 1m of target soil
300 kg per 3 and using a deep mixing processor equipped with biaxial stirring blades, G. L-8 to -1
The 7m thickness of m was improved. A 2.5 mm mesh wire net was installed at the mixer discharge port for producing the stabilizing material slurry for the purpose of removing coarse particles. When 28 days passed after the construction, boring of the stabilization treatment part was carried out, and core strength was measured. As a result, it was confirmed that uniaxial compressive strength of 2.5 to 7.6 kg / cm 2 was exhibited, and sufficient strength was confirmed. Was found to have.
【００２９】[0029]
【発明の効果】上述したように、本発明によれば、石膏
ボードの廃材を利用して土質安定処理を行なうことがで
き、単に廃材を処理するだけでなく、資源としての有効
利用ができる。As described above, according to the present invention, the waste material of gypsum board can be used for the soil stabilization treatment, and not only the waste material can be simply treated but also effectively used as a resource.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山本 晃一 千葉県佐倉市大作二丁目４番２号 小野田 セメント株式会社中央研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Yamamoto 2-4, Daisaku, Sakura-shi, Chiba Onoda Cement Co., Ltd. Central Research Laboratory
Claims (4)
とセメント５０〜９９重量部を含有することを特徴とす
る土質安定処理材。1. A soil stabilization material comprising 1 to 50 parts by weight of a crushed gypsum board waste material and 50 to 99 parts by weight of cement.
と、セメント５０〜９９重量部と、石灰、フライアッシ
ュ及び高炉スラグのうちの少なくとも１種とを含有する
ことを特徴とする土質安定処理材。2. A soil stability characterized by containing 1 to 50 parts by weight of ground gypsum board waste material, 50 to 99 parts by weight of cement, and at least one of lime, fly ash and blast furnace slag. Processing material.
に粉砕したもの及び／又は粉砕後２０ｍｍ以下の篩を通
過したものである請求項１又は２に記載の土質安定処理
材を、粉粒状態のまま土に混合することを特徴とする土
質安定処理工法。3. The soil stabilization material according to claim 1 or 2, wherein the ground gypsum board waste material is ground to 20 mm or less and / or passed through a sieve of 20 mm or less after grinding. A soil stabilization treatment method characterized by being mixed with the soil as it is.
粉砕したもの及び／又は粉砕後５ｍｍ以下の篩を通過し
たものである請求項１又は２に記載の土質安定処理材
に、水を添加し、スラリー状態にして土に混合すること
を特徴とする土質安定処理工法。4. Addition of water to the soil stabilization material according to claim 1 or 2, wherein the crushed material of the gypsum board waste material is crushed to 5 mm or less and / or passed through a sieve of 5 mm or less after crushing. Then, the soil stabilization treatment method is characterized in that it is made into a slurry state and mixed with the soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34463393A JPH07157761A (en) | 1993-12-08 | 1993-12-08 | Soil stabilization treating material and method for soil stabilization treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34463393A JPH07157761A (en) | 1993-12-08 | 1993-12-08 | Soil stabilization treating material and method for soil stabilization treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07157761A true JPH07157761A (en) | 1995-06-20 |
Family
ID=18370777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34463393A Pending JPH07157761A (en) | 1993-12-08 | 1993-12-08 | Soil stabilization treating material and method for soil stabilization treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07157761A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2338706A (en) * | 1998-06-27 | 1999-12-29 | John Charles Berry | Growing medium for derelict land |
| JP2004323599A (en) * | 2003-04-22 | 2004-11-18 | Jfe Material Co Ltd | Soil-solidifying agent and method for solidifying soil |
| JP2006348176A (en) * | 2005-06-16 | 2006-12-28 | Daiei Kogyo:Kk | Caking material |
| JP2008150481A (en) * | 2006-12-17 | 2008-07-03 | Daiei Kogyo:Kk | Solidification material |
| JP2010215741A (en) * | 2009-03-16 | 2010-09-30 | Penta Ocean Construction Co Ltd | Cement-based solidification-treated soil and method for producing the same |
| JP2010241979A (en) * | 2009-04-07 | 2010-10-28 | Masahito Mori | Improved soil and method of manufacturing improved soil |
| JP2011079951A (en) * | 2009-10-07 | 2011-04-21 | Daiei Kensetsu Kk | Recycled ground material and method for producing the same |
| JP2011195379A (en) * | 2010-03-19 | 2011-10-06 | Ube Industries Ltd | Cement-based solidified material and method for producing the same |
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-
1993
- 1993-12-08 JP JP34463393A patent/JPH07157761A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2338706A (en) * | 1998-06-27 | 1999-12-29 | John Charles Berry | Growing medium for derelict land |
| GB2338706B (en) * | 1998-06-27 | 2002-03-27 | John Charles Berry | Growing medium for derelict land |
| JP2004323599A (en) * | 2003-04-22 | 2004-11-18 | Jfe Material Co Ltd | Soil-solidifying agent and method for solidifying soil |
| JP2006348176A (en) * | 2005-06-16 | 2006-12-28 | Daiei Kogyo:Kk | Caking material |
| JP2008150481A (en) * | 2006-12-17 | 2008-07-03 | Daiei Kogyo:Kk | Solidification material |
| US8280697B2 (en) | 2007-11-08 | 2012-10-02 | Cemex, Inc. | Concrete pavement system and method |
| JP2010215741A (en) * | 2009-03-16 | 2010-09-30 | Penta Ocean Construction Co Ltd | Cement-based solidification-treated soil and method for producing the same |
| JP2010241979A (en) * | 2009-04-07 | 2010-10-28 | Masahito Mori | Improved soil and method of manufacturing improved soil |
| JP2011079951A (en) * | 2009-10-07 | 2011-04-21 | Daiei Kensetsu Kk | Recycled ground material and method for producing the same |
| JP2011195379A (en) * | 2010-03-19 | 2011-10-06 | Ube Industries Ltd | Cement-based solidified material and method for producing the same |
| CN108585652A (en) * | 2018-07-20 | 2018-09-28 | 思力佳特种环保材料（深圳）有限公司 | A kind of regeneration activity material, preparation method and environmental protection brick based on mud dregs |
| CN110386800A (en) * | 2019-06-05 | 2019-10-29 | 东南大学 | A kind of modification method of sulfate-salinized soil |
| CN110386800B (en) * | 2019-06-05 | 2021-10-29 | 东南大学 | Improvement method of sulfate saline soil |
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