WO2012050076A1 - Terre recyclée, terre de plantation, garniture supérieure de pelouse, matériau de couche de base et terre pour sols - Google Patents

Terre recyclée, terre de plantation, garniture supérieure de pelouse, matériau de couche de base et terre pour sols Download PDF

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Publication number
WO2012050076A1
WO2012050076A1 PCT/JP2011/073304 JP2011073304W WO2012050076A1 WO 2012050076 A1 WO2012050076 A1 WO 2012050076A1 JP 2011073304 W JP2011073304 W JP 2011073304W WO 2012050076 A1 WO2012050076 A1 WO 2012050076A1
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WIPO (PCT)
Prior art keywords
soil
molten slag
dehydrated cake
granules
recycled
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PCT/JP2011/073304
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English (en)
Japanese (ja)
Inventor
真輝 川谷
崇司 大藪
Original Assignee
東和スポーツ施設株式会社
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Priority claimed from JP2010229554A external-priority patent/JP4848043B1/ja
Application filed by 東和スポーツ施設株式会社 filed Critical 東和スポーツ施設株式会社
Priority to JP2012505529A priority Critical patent/JP5021105B2/ja
Priority to CN201180003942XA priority patent/CN102597375A/zh
Publication of WO2012050076A1 publication Critical patent/WO2012050076A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00—Foundations for pavings
    • E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G22/00—Cultivation of specific crops or plants not otherwise provided for
    • A01G22/15—Leaf crops, e.g. lettuce or spinach 
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
    • E01C13/02—Foundations, e.g. with drainage or heating arrangements

Definitions

  • the present invention relates to recycled soil using recycled materials such as waste. Also used for planting soil used for cultivation of plants and vegetables, lawn filler used on the top of lawn for the purpose of enhancing the cushioning property of lawn, roadbed with sidewalk pavement or ground pavement structure It is related to soil for ground used in outdoor facilities such as playground materials used in sports fields such as schools, various stadiums, and parks.
  • Patent Document 1 describes soil for cultivation such as plants and vegetables using a dehydrated cake obtained by recycling waste.
  • Dehydrated cake is a solidified sludge generated from the water purification plant and sewage treatment plant of each municipality, meets certain safety standards, and exhibits neutral pH 7-8 in aqueous solution. Since dehydrated cake is a recycling material that is continuously generated in a large amount in each local government, by using such a material, inexpensive planting soil can be continuously supplied. Moreover, since the amount of waste can be reduced by using recycled materials, the problem of shortage of waste disposal sites is also solved.
  • Recycled soil is expected to be used for a wide range of purposes, such as soil for cultivation of plants and vegetables as described in Patent Document 1, as well as soil for ground and roadbed materials for paving. In many cases, the soil is required to have excellent water retention and water permeability.
  • Patent Document 1 uses a dehydrated cake as a main raw material, and has the feature of being excellent in water retention, but has a problem of low water permeability.
  • the problem to be solved by the present invention is to provide a recycled soil that can be manufactured using a recyclable material that can be stably obtained at low cost, and has both excellent water retention and water permeability.
  • Recycled soil according to the present invention made to solve the above problems is a) A molten slag granule composed of one or more types of molten slag selected from general waste, industrial waste, and steel slag, and having a particle size adjusted to 40 mm or less, b) It is composed of dehydrated cake obtained by dehydrating and drying one or more selected from water sludge, sewage sludge, and paper sludge, and blended with dehydrated cake granules adjusted to a particle size of 40 mm or less. It is characterized by.
  • the recycled soil according to the present invention is blended with molten slag, which is a waste recycling material, like the dehydrated cake.
  • Dehydrated cake has excellent water retention.
  • the molten slag can be adjusted in particle size to an appropriate size, and as a result, an appropriate gap can be generated inside the soil to make the soil with water permeability. For this reason, it can be set as the soil which has water retention and water permeability by mix
  • the particle size is adjusted to 40 mm or less is to obtain a particle size commonly required for planting soil, roadbed material, ground soil and the like, which will be described later.
  • each of the molten slag and the dehydrated cake is blended at least 10% of the entire soil. It is desirable.
  • the molten slag granule and the dehydrated cake granule are desirably blended at a ratio of 3: 7 to 7: 3. More preferably, the molten slag granules and the dehydrated cake granules are blended in a ratio of 3: 7 to 5: 5. Recycled soil blended at such a ratio combines particularly excellent water retention and water permeability.
  • the recycled soil according to the present invention can be suitably used as planting soil for cultivating plants, vegetables and the like.
  • the recycled soil according to the present invention is used as planting soil, the molten slag granule is adjusted to 20 mm or less, and the dehydrated cake granule is adjusted to a particle size of 20 mm or less.
  • the soil for planting needs to contain nutrients necessary for the growth of plants and the like in a well-balanced manner, unlike soil for roads and playgrounds.
  • large pores are formed between the aggregates inside the soil, and small pores are formed inside the aggregates to activate the activities of soil microorganisms and soil small organisms, producing a lot of nutrients necessary for the growth of plants, etc.
  • the soil having such a aggregate structure is excellent in terms of water retention and water permeability, and is suitable for growing plants and the like.
  • the soil for planting according to the present invention is blended with molten slag granules adjusted to a particle size of 20 mm or less and dehydrated cake granules adjusted to a particle size of 20 mm or less, these granules It has pores of a size suitable for growing plants and the like due to the gaps between them.
  • the molten slag granules and the dehydrated cake granules have a aggregate structure.
  • the silt component means a fine particle component such as sand powder or crushed stone powder.
  • Molten slag and dehydrated cake are manufactured in various places throughout the country, and the particle size distribution varies depending on the manufacturing location. If blended with 0% to 20% silt, it compensates for variations in the particle size distribution of molten slag granules and dehydrated cake granules, and has a pore size that is suitable for growing plants. Can be soil.
  • the recycled soil according to the present invention can also be suitably used as a roadbed material used for a roadbed with sidewalk pavement or ground pavement structure.
  • recycled crushed stone has been widely used for roadbed materials.
  • Recycled crushed stone is a concrete by-product or asphalt concrete lumps that are reused after being crushed among construction by-products generated when building structures are demolished.
  • Patent Document 2 proposes a roadbed material made of granulated powder produced by crushing a dehydrated cake and adding a hydraulic binder.
  • blast furnace cement is used as the hydraulic binder, the water in the roadbed layer is brought close to neutrality, the road tree is not adversely affected, and the heat island phenomenon can be suppressed.
  • the blast furnace cement is a cement obtained by mixing Portland cement with fine powder of blast furnace slag, which is a by-product generated from the blast furnace, which is a pig iron manufacturing process in an ironworks.
  • blast furnace cement it is necessary to use Portland cement in addition to the fine powder of blast furnace slag, which is a recycled material.
  • the roadbed material according to the present invention preferably contains 0% to 20% crushed stone or recycled crushed stone with respect to the total amount of the molten slag particle material and the dehydrated cake particle material. Further, it is desirable that the roadbed material according to the present invention is blended with a silt content so that the fine particle content of the entire roadbed material is 3% to 18%.
  • the recycled soil according to the present invention can be suitably used as ground soil.
  • the molten slag granules and the dehydrated cake granules are blended at a ratio of 4: 6 to 6: 4, and the molten slag granules are 9.5 mm or less.
  • the dehydrated cake granule is adjusted to a particle size of 9.5 mm or less, and the silt content is blended so that the total fine particle content is 10% to 18%.
  • the recycled soil according to the present invention dehydrates one or more types of molten slag selected from general waste, industrial waste, and steel slag, and one or more types selected from water sludge, sewage sludge, and paper sludge.
  • the dried dehydrated cake can be produced as a raw material. Therefore, the raw material can be obtained and manufactured stably at a low cost.
  • the recycled soil according to the present invention includes a dehydrated cake granule and a molten slag granule. Therefore, the recycled soil according to the present invention can be adjusted in particle size to an appropriate size, and as a result, an appropriate gap is generated inside the soil, thereby having water permeability.
  • the soil for planting according to the present invention is blended with a dehydrated cake granule having a particle size of 20 mm or less and a molten slag granule having a particle size of 20 mm or less, it has pores between these granules. Accordingly, the planting soil according to the present invention activates the activities of soil microorganisms and soil small organisms, and forms an environment in which many nutrients necessary for the growth of plants and the like are formed. Suitable for Moreover, it is excellent also in water retention and water permeability.
  • the roadbed material according to the present invention has excellent water retention and water permeability, the road surface temperature can be lowered by the heat of vaporization when the water retained inside the roadbed material evaporates, and the heat island phenomenon is suppressed. be able to. Moreover, since the roadbed material according to the present invention does not have strong alkalinity, the roadside tree is not adversely affected.
  • the ground soil according to the present invention similarly has excellent water retention and water permeability.
  • the molten slag granules and the dehydrated cake granules are blended at a ratio of 4: 6 to 6: 4, the molten slag granules are adjusted to 9.5 mm or less, and the dehydrated cake granules are adjusted to a particle size of 9.5 mm or less.
  • the silt content is blended so that the total fine particle content is 10% to 18%, so it has both elasticity suitable for ground soil and excellent compaction.
  • the figure which shows the manufacture procedure of the recycled soil which concerns on one embodiment of this invention The figure which shows the test item and specification of the general characteristic of a soil, and a particle size characteristic.
  • FIG. The figure explaining the test method of the soil characteristic regarding pH value, content of an active ingredient, etc.
  • FIG. The figure which shows the water retention test result of the soil for planting which concerns on Example 1.
  • FIG. 1 The graph which shows the change of the surface temperature of the natural turf grown using the soil for planting concerning Example 1.
  • FIG. The graph which shows the change of the surface temperature of the artificial turf in the test which uses the recycle soil concerning the Example of this invention as an artificial turf filler.
  • FIG. The figure which shows the water retention test result of a roadbed material and volcanic gravel concerning Example 2.
  • FIG. The figure which shows the pavement structure in the comparative test of the heat island phenomenon suppression effect using the roadbed material and crushed stone which concern on Example 2.
  • FIG. 1 The figure which shows transition of the temperature of the surface layer surface in the comparative test of the heat island phenomenon suppression effect using the roadbed material and crushed stone which concern on Example 2.
  • FIG. 1 The figure which shows transition of the temperature of the position 100mm above the surface layer surface in the comparative test of the heat island phenomenon suppression effect using the roadbed material and crushed stone which concern on Example 2.
  • FIG. 1 The figure which shows transition of the temperature difference in the surface of the surface layer in the comparative test of the heat island phenomenon suppression effect using the roadbed material and crushed stone which concern on Example 2.
  • FIG. The figure which shows transition of the temperature difference in a 100-mm upper position from the surface layer surface in the comparative test of the heat island phenomenon suppression effect using the roadbed material and crushed stone which concern on Example 2.
  • FIG. 1 The figure which shows the temperature difference in the specific time in the comparative test of the heat island phenomenon suppression effect using the roadbed material and crushed stone which concern on Example 2.
  • FIG. The figure which shows transition of the temperature of the position 100 mm above the surface layer surface in another comparative test of the heat island phenomenon suppression effect using the roadbed material and crushed stone concerning Example 2.
  • FIG. 1 The figure which shows transition of the temperature difference in the surface of the surface layer in another comparative test of the heat island phenomenon suppression effect using the roadbed material and crushed stone which concern on Example 2.
  • FIG. 1 The figure which shows transition of the temperature difference in 100 mm upper position from the surface of the surface layer in another comparative test of the heat island phenomenon suppression effect using the roadbed material and crushed stone concerning Example 2.
  • Recycled soil of the present invention is composed of one or more types of molten slag selected from general waste, industrial waste, and steel slag, and a molten slag granule adjusted to a particle size of 40 mm or less, water sludge, It is composed of a dehydrated cake obtained by dehydrating and drying one or more selected from sewage sludge and paper sludge, and a dehydrated cake granule adjusted to a particle size of 40 mm or less.
  • Dehydrated cake is a solidified sludge generated from the water purification plant or sewage treatment plant of each municipality, and is supplied stably on a municipal basis.
  • the dehydrated cake meets certain safety standards and is neutral in pH 7-8 in aqueous solution.
  • Molten slag is produced by melting general waste (urban waste), industrial waste, etc. at high temperatures, decomposing and removing heavy metals and harmful substances, and cooling them, resulting in a significant reduction in volume. . By reusing the molten slag, it is possible to circulate resources. Molten slag is also neutral in pH 7-8 in aqueous solution, similar to dehydrated cake.
  • JIS A5031 general waste, sewage sludge or aggregated molten slag aggregate for incineration
  • JIS A5032 general waste, sewage sludge or incinerated ash
  • the molten slag produced at the melt processing facility is a safety standard (elution standard and content standard for hazardous substances (cadmium, lead, hexavalent chromium, arsenic, total mercury, selenium, fluorine, boron)) Meet.
  • a safety standard elution standard and content standard for hazardous substances (cadmium, lead, hexavalent chromium, arsenic, total mercury, selenium, fluorine, boron)
  • Use of such molten slag as a raw material for soil is preferable from the viewpoint of safety.
  • FIG. 1 shows a procedure for manufacturing the recycled soil according to the present embodiment by mixing molten slag and dehydrated cake.
  • FIG. 1 shows a production procedure for adjusting the particle size after blending the molten slag and the dehydrated cake, the particle size may be adjusted before blending the molten slag and the dehydrated cake.
  • the recycled soil according to the present embodiment is composed of molten slag granules and dehydrated cake granules.
  • molten slag and molten slag as raw materials are used.
  • the granular materials are collectively referred to as “molten slag”, and the dehydrated cake and dehydrated cake granules are collectively referred to as “dehydrated cake”. Accordingly, the blending ratio of recycled soil and the like shown in the following examples is the ratio of the molten slag granule and the dehydrated cake granule.
  • the steps enclosed by the broken line are performed as necessary.
  • the raw material is brought in from the gravel collection site when sand powder or the like is added to the recycled soil as a silt component.
  • FIG. 2 shows test items related to general characteristics and particle size characteristics.
  • FIG. 3 shows the test results regarding the general characteristics and particle size characteristics of the recycled soil according to this example.
  • five types of recycled soil were used in which molten slag and dehydrated cake were blended at a ratio of 3: 7 to 8: 2.
  • the upper column of FIG. 3 shows the mixing ratio of molten slag and dehydrated cake of recycled soil (A) to (E) (molten slag: dehydrated cake), and the test date and test result are shown below. From the values of natural moisture content, all of the recycled soils (A) to (E) showed better water retention than the crushed stones and regenerated crushed stones used for comparison.
  • Figure 4 shows the evaluation of water permeability characteristics of recycled soil (A) to (E).
  • the evaluation of water permeability was made based on the results of three simple water permeability tests conducted each time.
  • 200 ml of recycled soil is put in a container, the surface is leveled, and lightly struck 25 times with a wooden stick with a diameter of 25 mm and a length of 180 mm. This was done by measuring the time to penetrate the recycled soil when 150 ml of water was poured.
  • recycled soil (A), (B), and (E) have excellent water permeability equivalent to or better than crushed stone and recycled crushed stone in addition to excellent water retention.
  • recycled soil (A) molten slag: recycled soil containing dehydrated cake in a ratio of 5: 5
  • recycled soil (E) molten slag: recycled soil mixed with dehydrated cake in a ratio of 3: 7) Excellent water retention and water permeability.
  • recycled soil with good water permeability tends to have a low water content ratio.
  • recycled soils (A) and (E) have both excellent water permeability and water content, so if the surface layer contains a large amount of water, it quickly absorbs the water and the surface layer is dry. If it is, it can be said that it has an excellent humidity control property of supplying moisture.
  • Recycled soil (C) had excellent water retention, but its water permeability was inferior to recycled soil (A), (B), (E).
  • water permeability can be improved by mixing silt content such as sand powder and crushed stone powder, which has been conventionally blended in soil, with recycled soil (C).
  • the soil for planting according to Example 1 is composed of one or more types of molten slag selected from general waste, industrial waste, and steel slag, and a molten slag granule having a particle size adjusted to 20 mm or less,
  • molten slag selected from general waste, industrial waste, and steel slag
  • a molten slag granule having a particle size adjusted to 20 mm or less
  • One or a plurality of types selected from water sludge, sewage sludge, and paper sludge are dehydrated and dried, and are blended with dehydrated cake granules whose particle size is adjusted to 20 mm or less.
  • the reason why the particle size of the molten slag granule and the dehydrated cake granule was set to 20 mm or less was that the soil for planting according to Example 1 had a size suitable for growing plants and the like due to the pores between these granules. It is considered to have perforations.
  • the procedure for producing the soil for planting according to Example 1 is almost the same as the procedure for producing the recycled soil shown in FIG. 1, but when performing a density test or the like, a particle size test is also performed as necessary.
  • Example 1 In order to evaluate the characteristics of the soil for planting according to Example 1, a gardenia planting experiment, a natural turf growth test, a lettuce cultivation test, and a Seikoin radish cultivation test were conducted. Each result will be described in turn.
  • the planting experiment of gardenia was carried out by planting gardenia in a planting pot having a diameter of 15 cm and a depth of 25 cm. Planting experiments were conducted for 13 months from December 2009 to December 2010.
  • soil A was prepared by mixing molten slag, dehydrated cake, and sand silt in a ratio of 45:45:10 according to the above-described manufacturing procedure.
  • soil B was mixed with soil A and molten slag at a ratio of 90:10 to increase the ratio of molten slag
  • soil A and molten slag was mixed at a ratio of 80:20 to further increase the ratio of molten slag.
  • Soil C soil A mixed with 20 g of granular chemical fertilizer Wood Ace (trade name; manufactured by Mitsubishi Chemical Aguri Co., Ltd.), soil D, soil A mixed with 40 g of wood ace and soil A, soil A with 60 g of wood ace
  • Each soil F was prepared.
  • Green Foster LT (trade name, manufactured by Toyota Roof Garden Co., Ltd.) was used.
  • Green foster LT is an excellent planting soil having the characteristics shown in FIG.
  • Green Foster LT is referred to as comparative soil 1.
  • FIG. 7 shows changes in the volume of gardenia grown in soil A, soil E, and comparative soil 1. From FIG. 7, it can be seen that soil A and soil E exhibit better characteristics than comparative soil 1 particularly in summer. This is considered to be because soils A and E are particularly excellent in water retention during drying, among various characteristics required for planting soil.
  • FIG. 8 shows a test method for soil properties relating to the pH value and the content of active ingredients
  • FIG. 9 shows the test results for each individual.
  • the result of having done the same test about the molten slag which is a raw material in a present Example, a dewatering cake, and sand powder is shown in FIG.
  • the specific item which shows a remarkable correlation with the result of the said planting experiment is not seen, it is thought that each item has a favorable correlation mutually.
  • the fact that the pH value of each soil is higher than the pH value of the raw material shown in FIG. 10 is due to the high pH value of the water used during the planting experiment.
  • FIG. 11 shows the results of examining the properties of the three-phase distribution, saturated hydraulic conductivity, effective moisture, and particle size composition of the soil collected from the above 11 strains.
  • the soil name in FIG. 11 is based on a triangular coordinate (international law), and classifies soil based on a particle size composition.
  • the particle size composition is expressed as a weight percentage for each predetermined particle size range with respect to the soil excluding gravel (particle size of 2.0 mm or more).
  • the particle size of coarse sand is 0.2 mm to 2.0 mm
  • the particle size of fine sand is 0.02 mm to 0.2 mm
  • the particle size of silt is 0.002 mm to 0.02 mm
  • the particle size of clay is 0.001 mm to 0.002 mm.
  • the soil structure composition confirmation test uses soil A, which is a natural sand soil that is widely used as a soil for planting, and a soil that is mixed with high-quality soil so as to have an aggregate structure suitable for planting. It was compared with soil premix (trade name, manufactured by Ecomax Co., Ltd.).
  • the aggregate structure composition confirmation test was performed by an aggregate analysis method (wet sieving method) based on the soil environment analysis method. The result is shown in FIG.
  • the degree of aggregate formation is a percentage of the ratio of the mass of aggregates larger than the standard particle size divided by the mass of soil particles smaller than the standard particle size, and is a guideline for evaluating the aggregate structure of the soil for planting.
  • Become The soil showing a high degree of aggregate formation has large pores between the aggregates and small pores inside the aggregates, and is excellent in both water permeability and water retention. Moreover, in such soil, the activities of soil microorganisms and small soil animals are likely to be active, and the soil contains a large amount of nutrients necessary for the growth of plants and the like.
  • soil A has the highest numerical value at a standard particle size of 0.10 mm, and has a superior aggregate structure as compared with pure sand soil or soil premix.
  • a water holding capacity comparison test (JGS 0151) of the soil for planting according to this example was performed.
  • the maximum / minimum temperature measured during the test period was 49.0 ° C / 20.5 ° C for soil x, 51.0 ° C / 20.5 ° C for soil y, and 52.5 ° C / 21.5 ° C for comparative soil 2.
  • the largest difference between the surface temperature of the lawn growing in soil x and soil y and the surface temperature of the lawn growing in comparative soil 2 occurred at 12:00 on August 6, 2011, The temperature difference was 3.0 ° C.
  • the surface temperature of the lawn on each soil was 46.5 ° C. for soil x, 45.0 ° C. for soil y, and 48.0 ° C. for comparative soil 2.
  • FIG. 14 is an excerpt of the transition of measured temperature from August 6, 2011 at 8:00 to August 8, 2011 at 10:00. From this, it was confirmed that the soil x and the soil y according to the present example have an excellent heat island suppression effect.
  • the test filler was a two-layer filler in which soil z was spread on artificial grass and then covered with quartz sand.
  • the comparative filler was a filler in which only silica sand, which is a general artificial turf filler, was spread.
  • the silica sand was spread on the soil z because the soil z is closer to black than the silica sand and easily absorbs heat, so the temperature difference caused by the color difference of the filler is avoided. Because.
  • the test period was from 9:00 on July 29, 2011 to 10:00 on August 8, 2011. During this period, the surface temperature of the artificial turf with each filler was measured every 60 minutes.
  • the maximum / minimum temperature measured during the test period was 51.0 ° C / 20.5 ° C for the test filler and 53.5 ° C / 23.5 ° C for the comparative filler.
  • the largest difference in measured temperature occurred between the surface temperature of the artificial turf with the test filler and the surface temperature of the artificial turf with the comparative filler at 15:00 on August 6, 2011.
  • the temperature difference was 4.0 ° C.
  • the surface temperature of the artificial turf coated with the test filler was 45 ° C.
  • the surface temperature of the artificial turf coated with the comparative filler was 49 ° C.
  • FIG. 15 is an excerpt of the transition of the measured temperature from August 6, 2011 at 8:00 to August 8, 2011 at 0:00. From this result, it was confirmed that the soil x according to the present example exhibited the effect of suppressing the heat island phenomenon even when used as a lawn filler.
  • a lettuce cultivation test was conducted using the soil for planting according to this example.
  • the lettuce cultivation test was divided into a preliminary test and a main test.
  • soil c containing soil x ′ and bark compost in a ratio of 85:15
  • comparative soil 3 trade name “freshly picked vegetables” manufactured by Takii Seed Co., Ltd.
  • Comparative soil 3 is mixed with nitrogen, phosphoric acid, and potassium, which are the three elements of fertilizer, as well as trace elements such as magnesium (magnesium), boron, iron, and manganese, and slow-release fertilizer, and is adjusted to weak acidity. It is a high-quality planting soil for planting.
  • soil 8 was weakly acidic (pH 6.84) soil suitable for growing plants and the like by adding bark compost, rice husk and peat moss.
  • the soil used was soil b used in the lettuce growth test, soil 8 with good results in the lettuce growth follow-up test, and comparative soil 3 (trade name “freshly picked vegetables”, manufactured by Takii Seed Co., Ltd.) It is.
  • the soil 8 had a growth situation equivalent to or higher than that of the comparative soil 3. That is, it was confirmed that the planting soil according to the present example was a soil capable of growing plants and the like at the same level or higher as the high-quality planting soil while using recycled materials as the main raw material. .
  • soil x and soil 8 were analyzed in order to examine the effect of adding bark compost, rice husk and peat moss to soil x to make soil 8. The result is shown in FIG. From these comparisons, it was found that the addition of bark compost, rice husk and peat moss changed the pH value to slightly acidic, and the contents of nitrogen, phosphoric acid and potassium increased. These are all conditions suitable for the growth of plants, and the effect of appropriately adding additives to this example was confirmed.
  • the soil for planting according to the present invention may be adjusted with pH by adding a soil improver, if necessary, or supplied with three elements (nitrogen, phosphate, potassium) as fertilizer. It is desirable to adjust the hardness of the soil or the like.
  • soil conditioners include bark compost, rice bran compost, and peat moss blended in the above-described embodiments, rice straw and wheat straw, compost composed of these, livestock manure compost, rice chaff compost, corn cob compost, and tea shells.
  • Organic waste recycling materials that are generated in large amounts on a daily basis, such as residues such as coffee grounds and potatoes, can be used.
  • a roadbed material according to Example 2 is a roadbed material including recycled soil according to the above-described example, and is composed of one or a plurality of types of molten slag selected from general waste, industrial waste, and steel slag. Is composed of molten slag granules adjusted to 40 mm or less, and dehydrated cake obtained by dehydrating and drying one or more selected from water sludge, sewage sludge, and paper sludge, and the particle size is adjusted to 40 mm or less It is a blend of dehydrated cake granules.
  • the procedure for manufacturing the roadbed material according to Example 2 in the factory is the same as the procedure for manufacturing the recycled soil shown in FIG.
  • a roadbed material is manufactured by mixing molten slag and dehydrated cake with existing soil (local soil, natural soil such as true sand or red soil) at an outdoor site
  • the procedure shown in FIG. 18 is performed.
  • the roadbed material manufactured according to the procedure shown in FIG. 1 is checked for moisture content after completion and transported to the site by truck or the like.
  • the total amount of molten slag and dehydrated cake is the same as the existing soil in consideration of the soil quality of the existing soil as in the conventional case where the regenerated crushed stone is mixed into the existing soil. It is better to make it 15% to 50%.
  • the steps enclosed by broken lines are performed as necessary.
  • the raw material is brought in from the gravel collection site when sand powder is mixed with the roadbed material.
  • the sludge described in FIG. 18 is synonymous with the dehydrated cake described above.
  • a roadbed material using recycled soil (A) is referred to as a roadbed material (A)
  • a roadbed material using recycled soil (E) is referred to as a roadbed material (E).
  • the water holding capacity comparison test was performed by the same method as the water holding capacity comparison test of the soil for planting. The result is shown in FIG.
  • the volcanic gravel shows a higher value than the roadbed material (A). This is because the dry weight of the volcanic gravel is lighter than the dry weight of the roadbed material (A), and therefore the amount of volcanic gravel increases when a unit weight (100 g) of roadbed material is collected.
  • a test for evaluating the suppression effect of the heat island phenomenon was conducted using the roadbed material (A).
  • the effect of suppressing the heat island phenomenon is that using the above roadbed material (A) as the roadbed material (Example X) and crushed stone that is the conventional roadbed material under the same surface layer structure (Example X) ( It was evaluated by measuring how much temperature difference occurs between Comparative Example X) at the position 100 mm above the pavement surface and the pavement surface.
  • the roadbed material of Example X or Comparative Example X having a thickness of 100 mm is disposed on the ground surface, and a molten slag of 30 mm thickness is further provided as the sand, and the upper surface layer.
  • the temperature transition was measured and compared at the surface of the interlocking pavement and the position 100 mm above it.
  • FIG. 21 shows the transition of the interlocking pavement surface temperature of Example X and Comparative Example X
  • FIG. 22 shows the transition of the temperature at a position 100 mm above the interlocking pavement surface of Example X and Comparative Example X, respectively.
  • 23 shows the temperature difference between the interlocking pavement surfaces of Example X and Comparative Example X (Comparative Example X-Example X)
  • FIG. 24 shows the position 100 mm above the interlocking pavement surfaces of Example X and Comparative Example X.
  • the temperature difference at (Comparative Example X-Example X) is shown respectively.
  • Example X shows a lower temperature at almost all times within the measurement period.
  • FIG. 25 shows the weather at 10:00 and 16:00 during the measurement period, and the temperature difference between the interlocking pavement surface and 100 mm above (Comparative Example X-Example X). It is considered that the road surface temperature starts to rise around 10:00 and the road temperature starts to fall around 16:00 in the day. It is judged that there is an effect that it is difficult to raise the road surface temperature and it is easy to lower it. That is, it can be evaluated that the roadbed material (A) has a greater effect of suppressing the heat island phenomenon than crushed stone.
  • Example Y has a structure consisting of a 100 mm thick roadbed material (A) disposed on the ground surface and a 100 mm thick surface layer material disposed above it, and Comparative Example Y is 100 mm thick disposed on the ground surface. It has a structure consisting of a crushed stone and a surface layer material with a thickness of 100 mm arranged above it.
  • the surface layer material of Example Y is a mixture of molten slag, dehydrated cake, and sand powder in a ratio of 45:45:10 (hereinafter referred to as “surface layer material Y”) as in the above-described planting soil A. Yes, the surface material of Comparative Example Y is pure sand.
  • FIG. 27 shows the transition of the interlocking pavement surface temperature of Example Y and Comparative Example Y
  • FIG. 28 shows the transition of the temperature at a position 100 mm above the interlocking pavement surface of Example Y and Comparative Example Y, respectively.
  • FIG. 29 shows the temperature difference between the interlocking pavement surfaces of Example Y and Comparative Example Y (Comparative Example Y-Example Y)
  • FIG. 30 shows the position 100 mm above the interlocking pavement surface of Example Y and Comparative Example Y.
  • the temperature difference at (Comparative Example Y-Example Y) is shown respectively.
  • Example Y shows a lower temperature at almost all times within the measurement period.
  • the surface layer material Y used for the surface layer material of Example Y has better water retention than the pure sand soil used for the surface layer material of Comparative Example Y, it is closer to black than the true sand soil and easily absorbs heat. Therefore, in the experiment that the present inventor has conducted in the past, when the roadbed material is recycled crushed stone and the surface layer material is the surface layer material Y, the surface temperature particularly in the sunshine hours is the same as or higher than that of the comparative example Y. The tendency was easy. Nonetheless, Example Y showed a lower temperature transition than Comparative Example Y, and the roadbed material (A) still has a better heat island effect suppression effect than crushed stone, It can be evaluated as excellent as a roadbed material for playgrounds and various stadiums.
  • the optimum water content ⁇ opt of the roadbed material (E) was 18.6%, and the maximum dry density ⁇ dmax was 1.643 g / cm 3 .
  • the optimum water content ratio and the maximum dry density mean the water content ratio and density in a state where the road base material (E) is best tightened when it is compacted.
  • the compacted corn index test was performed using four types of samples 1 to 4 (moisture content: 9.8%, 13.2%, 16.1%, 19.4%) with different moisture content of the roadbed material (E). The result is shown in FIG.
  • the Cone Index represents the soil property that indicates whether the construction machine is good or bad.
  • the cone index corresponds to the contact pressure of each construction machine as shown in FIG. 32, and is used as a scale for determining whether or not the construction machine can travel, and is a standard indicating the firmness of the roadbed material.
  • the cone index qc (kN / m 2 ) is the penetration resistance force that acts on the bottom of the cone when the cone penetrometer is continuously pushed from the ground surface to 5 cm, 7.5 cm and 10 cm at a penetration rate of 1 cm / s ( The average value of kN) is obtained and divided by the bottom area (3.24 cm 2 ) of the tip cone (penetration resistance / bottom area of the tip cone).
  • the roadbed material (E) runs on the dump truck. It can be seen that it is as robust as possible. From the above, it can be said that the roadbed material (E) is sufficiently solid to be used as a roadbed material used in outdoor facilities such as school playgrounds, various stadiums, parks, sidewalks and the like.
  • the above embodiment is premised on the use for roadbed materials used for sidewalk pavements and ground pavement roadbeds, but by mixing recycled crushed stone with them, it can be applied to roads. Can be given.
  • the 95% corrected CBR value was 50.4%.
  • This CBR value exceeds the revised CBR value of 40% for recycled crusher run, which is the lower roadbed material for roads. Therefore, if the recycled crushed stone is mixed with the roadbed material (E), it is possible to provide the solidity that can be used as a roadbed material for parking lots and roads.
  • the roadbed material can be provided with new characteristics by adding sodium chloride, natural rice husk, natural scallop shell, and natural small pumice to the roadbed material of the present invention.
  • sodium chloride When sodium chloride is added to the roadbed material of the present invention, the roadbed material can be prevented from freezing and the growth of weeds can be suppressed.
  • Sodium chloride may be blended in a proportion of 1 m 2 per 2 ⁇ 4 kg. If rice husk or scallop husk is blended, the road base material can be prevented from freezing and the growth of weeds can be prevented, and the water retention and humidity control properties of the road base material can be improved. Furthermore, if pumice is blended, the water retention and humidity control properties of the roadbed material can be further improved.
  • the recycled soil of the present invention can be applied to soil for planting and roadbed materials, as well as surface soil with a ground pavement structure.
  • dehydrated cake granules and molten slag granules are blended in a ratio of 4: 6 to 6: 4, and the particle size of both granules is 9.5 mm or less.
  • a silt such as sand powder or crushed stone powder so that the total fine particle content is 10 to 18%.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Botany (AREA)
  • Environmental Sciences (AREA)
  • Cultivation Of Plants (AREA)
  • Road Paving Structures (AREA)

Abstract

L'invention concerne une terre recyclée obtenue en combinant : un matériau en grain issu de mâchefer fondu comprenant un mâchefer fondu d'un ou de plusieurs types choisis parmi des déchets généraux, des déchets industriels et du mâchefer de fer ou d'acier, et traité de sorte que le diamètre des grains soit de 40 mm ou moins ; et un matériau en grain issu de gâteau déshydraté comprenant un gâteau déshydraté obtenu en déshydratant et en séchant un ou plusieurs types de boues choisis parmi les boues d'eau de robinet, les boues d'égouts et les boues de papier, et traité de sorte que le diamètre des grains soit de 40 mm ou moins. Il est préférable que le rapport de combinaison entre le mâchefer fondu et le gâteau déshydraté varie de 1:9 à 9:1 et, de préférence encore, de 3:7 à 7:3. Il est possible d'utiliser cette terre recyclée comme terre à usages multiples, par exemple comme terre de plantation, comme matériau de couche de base utilisé en tant que couche de base lors du pavement de trottoir et de sols, ainsi que comme terre pour les sols.
PCT/JP2011/073304 2010-10-12 2011-10-11 Terre recyclée, terre de plantation, garniture supérieure de pelouse, matériau de couche de base et terre pour sols WO2012050076A1 (fr)

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CN201180003942XA CN102597375A (zh) 2010-10-12 2011-10-11 回收土壌、栽培用土壌、草坪用填充材料、路基材料以及场地用土壌

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JP2017212900A (ja) * 2016-05-31 2017-12-07 Ｌｏｌ株式会社 土壌再生方法および再生土壌
JP2020122142A (ja) * 2019-01-30 2020-08-13 株式会社ハイクレー 植栽用土壌改良材、及び植栽用土壌、並びに植栽用土壌の製造方法、及び植栽方法
JP2021067083A (ja) * 2019-10-23 2021-04-30 日鉄エンジニアリング株式会社 植生土嚢

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JP5615462B1 (ja) * 2012-11-19 2014-10-29 東洋ゴム工業株式会社 人工土壌培地
CN105350630B (zh) * 2015-11-14 2017-06-06 常州大学 一种城市雨水快速下渗及回用技术
JP7282330B2 (ja) * 2019-10-23 2023-05-29 日鉄エンジニアリング株式会社 植生基材

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JPH10266109A (ja) * 1997-03-27 1998-10-06 Hasegawa Taiiku Shisetsu Kk 舗装方法及び舗装土材乃至盛り土用改質剤
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JP2017212900A (ja) * 2016-05-31 2017-12-07 Ｌｏｌ株式会社 土壌再生方法および再生土壌
JP2020122142A (ja) * 2019-01-30 2020-08-13 株式会社ハイクレー 植栽用土壌改良材、及び植栽用土壌、並びに植栽用土壌の製造方法、及び植栽方法
JP7371831B2 (ja) 2019-01-30 2023-10-31 株式会社ハイクレー 植栽用土壌改良材、及び植栽用土壌、並びに植栽用土壌の製造方法、及び植栽方法
JP2021067083A (ja) * 2019-10-23 2021-04-30 日鉄エンジニアリング株式会社 植生土嚢
JP7250280B2 (ja) 2019-10-23 2023-04-03 日鉄エンジニアリング株式会社 植生土嚢

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