JP2000248280A - Soil conditioner related to production of coarse aggregate and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a soil conditioner composition for providing a backing material and a backfill material for engineering works, construction, road, pavement, or the like, from surplus soil of construction and soil for dumping. SOLUTION: This composition comprises a combination of 100 kilogram/cubic meter to 400 kilogram/cubic meter of a cement-based hardening material, 3 kilogram/cubic meter to 20 kilogram/cubic meter of an asphalt-based aqueous emulsion, vinylon fibers having 1.8 denier × 6 millimeter cut and vinylon fibers having 15 denier × 15 millimeter cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cement-based solidifying material of 100 kg / cubic meter to 400 kg / cubic meter, asphalt-based aqueous emulsion 3 kg / cubic meter to 20 kg / cubic meter, and a vinylon fiber of 1.8 cm3 per cubic meter of the target soil. Denier × 6
Millimeter cut and vinylon fiber 15 denier x 15
By adding and mixing a composition consisting of a combination of millimeter cuts, a coarse aggregate having excellent strength properties and a coarse aggregate having a diameter of 3 mm to 30 mm are manufactured.

[0002] The above product is used for civil engineering concrete structures,
Underground materials for construction structures, below-mentioned materials, civil engineering materials, concrete ground materials, outdoor stadiums, finishing materials for tennis courts, etc. It can be used in fields such as high strength concrete materials. In addition, 100 kg / cubic meter to 400 kg / cubic meter of cement-based solidification material per 1 cubic meter of the target soil, asphalt-based aqueous emulsion 3
An appropriate strength characteristic can be created by adjusting the compounding ratio of a composition comprising a combination of kilograms / cubic meter to 20 kilograms / cubic meter, vinylon fiber of 1.8 denier × 6 mm cut and 15 denier × 15 mm cut.

[0003] Further, the coarse aggregate of general construction materials produced by the present invention has several vinylon fibers in one plant, and has not only strength properties but also cement such as Portland cement and others.
Combines with coarse aggregate and water to produce fresh concrete.

[0004] In addition, one individual has several vinylon fiber projections to help stabilize the bond between individuals.

[0005] Further, vinylon fibers and asphalt-based aqueous emulsion are singulated and fixed between the soil particles constituting one individual by a pozzolanic reaction with a cement-based solidifying material, thereby forming an individual having water barrier properties.

[0006] Therefore, one coarse aggregate does not absorb water, and becomes a substitute for coarse stone, crushed stone and sand, and the aggregate has water permeability.

Further, the asphalt-based aqueous emulsion has both chemical resistance by enclosing one soil particle. (Means for solving the problem)

[0008] The soil conditioner according to the present invention which solves the above-mentioned problems is obtained from a composition comprising a combination of a cement-based solidifying material, an asphalt-based aqueous emulsion, 1.8 denier x 6 mm cut, and 15 denier x 15 mm cut. Can be

Further, the method for producing coarse aggregate according to the present invention is characterized in that a cement-based solidified
0 kg / cubic meter to 400 kg / cubic meter Asphalt-based aqueous emulsion 3 kg / cubic meter to 20 kg / cubic meter, vinylon fiber 1.8 denier x 6 mm Cut 0.1 kg / cubic meter to 20 kg / cubic meter, vinylon fiber 15 denier x 15 mm 0.1 kg / cubic meter to 20 kg / cubic meter of cut are added to soil consisting of sandy soil, silt, and cohesive soil, and mixed to produce.

[0010] In the production of coarse aggregate using the above soil improving material, the produced soil created by adding and mixing is added to the soil.
Time ~ 168 hours after natural curing, put into a coarse bone grinder, diameter 3
Produces coarse aggregate of millimeters to 30 millimeters.

[0011] In addition, the production soil created by the addition and mixing is 24
After natural curing and sheet curing for about 672 hours, it is put into a rubble crusher to produce coarse aggregate having a diameter of 3 mm to 30 mm.

The grain size of the coarse aggregate produced in the present invention can be selected from the range of possible performances of the coarse stone crusher.

The strength characteristics of the coarse aggregate produced in the present invention are determined by the compounding amount of the cement-based solidified material, vinylon fiber 1.8 denier × 6 mm cut, and vinylon fiber 15 denier × 15 mm cut.

[Specific configuration]

A composition comprising a combination of a main material, a cement-based solidifying agent, an asphalt-based aqueous emulsion, vinylon fiber 1.8 denier × 6 mm cut, and vinylon fiber 15 denier × 15 mm cut is added and mixed as a soil improving material. By doing so, coarse aggregate is manufactured.

As the cement-based solidifying material, those generally used can be used as they are. Specifically, generation of an ettling guide is promoted by using a large amount of water as bound water. Gypsum, lime, etc., promote Bozolan reaction. Slag, fly ash and the like are mixed with cement, alumina cement having high solidification performance, jet cement and the like. It is a special cement containing these required components. Further, the cement-based solidifying material may be a compound obtained by blending required components after the production process and after the production.

[0016] The vinylon fiber is a single fiber and is not trapped in shape and form. In addition, depending on the intended use of the coarse aggregate produced in the present invention, chemical fiber, carbon fiber, nylon fiber, polyester fiber, polyethylene fiber, polypropylene fiber, rayon fiber, vinyl acetate fiber, acetate fiber, glass fiber, etc. Shapes and forms are not trapped by fibers composed of seeds or a combination of two to five kinds.

The asphalt-based aqueous emulsion is a liquid asphalt or an aqueous dispersion obtained by dispersing an aqueous solution of a thermoplastic polymer substance and poval, and is sent to a mixer composed of a rotating body and a non-rotating body to convert the rotating body. Aqueous emulsion continuously produced by high-speed rotation, or the main material,
It is composed of dispersible goods and water, and the main material, petroleum asphalt, atactic polypropylene, petroleum resin, ethylene, vinyl acetate copolymer resin, polyethylene, vinyl chloride, polystyrene, polypropylene, disperse goods, cyclopentadiene-based A material composed of a small amount and a large amount of water, such as petroleum resin, higher olefins, potassium oleate, polyvinyl alcohol, and polyacrylamide.

The cement-based solidifying material bonds between the soil particles by forming an ettling guide by a pozzolanic reaction, and the vinylon fiber has a function of helping the cement-based solidifying material to bond between the soil particles. In an asphalt-based aqueous emulsion, it solidifies in synchronization with the pozzolanic reaction of the cement-based solidifying material.

The present invention relates to a method for producing a coarse aggregate, comprising the steps of: combining a cement-based solidifying material, vinylon fiber 1.8 denier × 6 mm cut, and vinylon fiber 15 denier × 15. It is a method.

Alternatively, a combination of a cement-based solidification material and 1.8 denier of vinylon fiber × 6 mm cut is used.
A method for producing the composition as a soil conditioner.

Alternatively, cement-based solidifying material, vinylon fiber 15
A method for producing a composition as a soil conditioner by a combination of denier x 15 mm cut.

Alternatively, a method of producing a composition comprising a combination of a cement-based solidifying material and a chemical fiber as a soil improving material.

Alternatively, a method of producing a composition comprising a combination of a cement-based solidifying material, an asphalt-based aqueous emulsion, and vinylon fiber 1.8 denier × 6 mm cut as a soil improving material.

[0024] Alternatively, a method for producing a soil-improving material by combining a cement-based solidifying material, an asphalt-based aqueous emulsion, and vinylon fiber 15 denier x 15 mm cut.

Alternatively, there is a method of producing a composition comprising a combination of a cement-based solidifying material, an asphalt-based aqueous emulsion, and a chemical fiber as a soil improving material.

In the production of coarse aggregate according to the present invention, a soil improvement material comprising a combination of two to four types of cement-based solidifying material, asphalt-based aqueous emulsion, vinylon fiber and chemical fiber is used for the target soil. Addition and mixing (1 step), natural curing and sheet curing (2 steps), pulverization with a pulverizer (3 steps), and coarse aggregate into a granulator (classifier) (4 steps), manufacturing I do.

[0027] The coarse aggregate production process described above as (1 process), (2 process), (3 process), and (4 process) is performed. Depending on the soil quality and roughness of the target soil and the water content, (1 process) , (2 steps), (3 steps), (2 steps), (3 steps), and (4 steps).

When the target soil contains a large amount of organic soil in sandy soil, silt, or clayey soil, the coarse aggregate has a grain shape of approximately 3 to 5 mm in diameter.

In the present invention, the coarse aggregate production machine and the production apparatus are Komatsu's BZ-200-based improved dedicated machine, Komatsu's Galapagos, and Komatsu's granulator (classifier). We manufacture in backhoes, stationary mixers, mobile mixers, and stachylizers. (Example)

Hereinafter, the present invention will be described in more detail with reference to Examples of the present invention. However, the present invention is not limited by these Examples.

Example 1 After mixing a cement-based solidifying material, an asphalt-based aqueous emulsion, and vinylon fiber with a test soil and sandy silt using a mixer, the improved water content and wet density on the material age , Uniaxial compression strength, bending strength, water permeability test, abrasion loss, above (Table 1) (Table 2). The water permeability test is based on JIS 1218 variable water level test and the uniaxial compression test is based on JIS 1216. Test. List of test results

[Table 1] Sample No. A-1 A-2 A-3 Cement-based solidifying material 150 ・ / ・ 200 ・ / ・ 300 ・ / ・ Asphalt-based aqueous emulsion 5 ・ ・ ・ 5 ・ / ・ 5 ・ / ・ Vinylon (1.8 denier / 6m / 5 ・ / ・ 5 ・ / ・ 5 ・ / ・ Vinylon (15 denier / 15m / m cut) 5 ・ / ・ 5 ・ / ・ 5 ・ / ・ Improved water content% 51.3 48.8 43.1 Wet density ・ /・ 1.61 1.633 1.661 Uniaxial compressive strength ・ f / ・ 4.04 8.1 10.09 Flexural strength ・ f / ・ 5.42 18.11 30.37 Permeability test ・ / s 5.35E-08 6.33E-08 7.59E-08 Abrasion loss% 41.5 30.6 33.7

[Table 2] Sample No. A-1 A-2 A-3 Cement-based solidifying material 150 ・ / ・ 200 ・ / ・ 300 ・ / ・ Asphalt-based aqueous emulsion---Vinylon (1.8 denier / 6m / m cut)---Vinylon (15 Denier / 15m / m cut)---Moisture content after improvement% 47.5 42.6 38.1 Wet density ・ / ・ 1.521 1.538 1.565 Uniaxial compressive strength ・ f / ・ 3.1 6.02 7.51 Flexural strength ・ f / ・ 2.08 2.63 3.32 Permeability test・ / S 8.21E-03 8.17E-04 8.73E-04 Abrasion loss% 58.6 55.2 54.4

Example 2 In a test soil and sandy silt, a cement-based solidifying material 200, an asphalt-based aqueous emulsion 10 kg / cubic meter, and a vinylon fiber 10 kg / cubic meter were mixed with a mixer, and then mixed. 7
The results of observations of the appearance of tap water, 10% saline, 10 calcium hydroxide solution, cement-saturated water solution, heavy oil, 10% calcium chloride solution, and various types of chemical liquids after immersion for 30 days in a day (Table) Shown in 3).

[Table 3] Pharmaceutical result Water Road Water No abnormality 10% saline No abnormality 10% calcium hydroxide solution No abnormality Cement saturated liquid No abnormality Heavy oil No abnormality 10% calcium chloride solution No abnormality PH = 3 sulfuric acid aqueous solution No abnormality PH = 3 acetic acid Solution No abnormality

Example 3, production of coarse aggregate from construction surplus soil,
Excavated soil at foundations and underground beams at construction sites
830 cubic meters, cement solidified material, Mitsubishi Materaru Stabilite 230 kg / cubic meter, asphalt aqueous emulsion, Tokiwa Chemical Brasic-C 6 kg / cubic meter, Vinylon Fiber Kuraray 1.8 denier x 6 mm cut 5 kg / cubic meter, 15 denier x 15 mm cut 5 kg / cubic meter added and mixed to produce a coarse aggregate diameter of 3 mm to 30 mm.

The soil of the excavated soil was sandy clay. The water content was between 50% and 70%.

Example 4, 290 cubic meters of waste soil (remaining soil) in the civil engineering sewer pipe laying shield construction was mixed with a cement-based solidifying material, 100 kg / cubic meter of Stabilite manufactured by Mitsubishi Materials Corporation, and the mixture was embanked and cured with a sheet for 72 hours. After that, cement-based solidifying material Mitsubishi Materials Stabilite 200 kg / cubic meter asphalt-based aqueous emulsion, Tokiwa Chemical Brasilic-C 6 kg / cubic meter, Vinylon Fiber Kuraray 1.8 denier x 6 mm cut 6 kg / cubic meter Was added and mixed to produce a coarse aggregate diameter of 3 mm to 5 mm.

The soil quality of the waste soil (remaining soil) was silt. The water content was between 150% and 200%.

Example 5, 370 cubic meters of soil remaining in the civil engineering sewer pipe laying work was cement-based solidifying material, Ube Industries, Ltd., UKC 230 kg / cubic meter, asphalt-based aqueous emulsion, Tokiwa Chemical Co., Ltd.
-C 8 kg / cubic meter, 1.8 denier x 6 mm cut 6 kg /
Cubic meter, 15 denier x 15 mm cut 6 kg / cubic meter Add and mix, coarse aggregate, diameter 3
20mm to 20mm manufactured.

The remaining soil was sandy silt. Also, the water content was 30% to 60%.

Example 6 In building work, 1,170 cubic meters of excavated soil at the foundation, underground beam, and advertising tower foundation was cement-based solidification material, Mitsubishi Materials Stabilite 300 kg / cubic meter, asphalt-based aqueous emulsion. , Tokiwa Chemical Brasilic-C 5
Kilogram / cubic meter, vinylon fiber, Kuraray
A 15 denier x 15 mm cut was added and mixed to produce a coarse aggregate diameter of 3-20 mm.

The remaining soil was clayey. The water content was between 30% and 50%.

【The invention's effect】

According to the present invention, the coarse and agglomerated natural aggregate, crushed stone, river sand and mountain sand are obtained by adding and mixing the civil engineering construction residual soil and waste soil with a cement-based solidifying material, an asphalt-based aqueous emulsion, and vinylon fiber. Substitute material was used.

Conventionally, surplus soil, waste soil, and the like were transported to a remote location for disposal, and the above-mentioned natural coarse aggregate was purchased. According to the current method, the round-trip fare, waste disposal cost, Significant costs were incurred, such as the cost of purchasing materials.

As described above, the use of the soil improving material and the manufacturing method according to the present invention makes it possible to produce coarse aggregate in a site where residual soil and waste soil are generated, in an open space, in a nearby open space, and the like.

The present invention reclaims discarded construction surplus soil, waste soil, etc. as coarse aggregate for construction, and provides a base material for civil engineering, building structures, a base material for earth concrete, an outdoor stadium, a finishing material for tennis courts and the like. Composition of distinctive materials used for lower base materials, civil engineering, backfill materials for architectural underground structures, base materials for roads and sidewalks, lower subgrade materials, coarse permeable aggregates, aggregates for low-strength concrete, etc. Things.

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Claims (2)

[Claims] [Claim 1] A cement-based solidifying material 100
Features a composition consisting of a combination of a kilogram / cubic meter to 400 kg / cubic meter asphalt-based aqueous emulsion 3 kg / cubic meter to 20 kg / cubic meter, vinylon fiber 1.8 denier × 6 mm cut, and vinylon fiber 15 denier × 15 mm cut. Soil conditioner for producing coarse aggregate. 2. Cemented solidification material 100 kg / cubic meter to 400 kg / 1 cubic meter of target soil
A composition comprising a combination of a cubic meter asphalt-based aqueous emulsion 3 kg / cubic meter to 20 kg / cubic meter, vinylon fiber 1.8 denier × 6 mm cut, and vinylon fiber 15 denier × 15 mm cut is used for sandy soil, silt, clayey soil. A method of producing coarse aggregate by mixing and adding to soil consisting of: