JP2007205010A - Mixture and construction method for soil-based pavement, and mixture and construction method for soil-based wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mixture for a soil-based pavement and a mixture for a soil-based wall, which do not decrease strength or deteriorate designability, in the case of construction in a cold district, and a construction method for the soil-based pavement and a construction method for the soil-based wall. <P>SOLUTION: After the mixing of water, the mixture for the soil-based pavement is placed and spread in a paving place, subjected to rolling compaction, and cured to be turned into the soil-based pavement. In the mixture for the soil-based pavement, 100 pts.mass soil containing 2-30 mass% particles with a particle diameter 75 μm or less, and 40-100 pts.mass cement are mixed together. The mixture for the soil-based wall is sprayed on a construction site, and cured to be turned into the soil-based wall. In the mixture for the soil-based wall, 100 pts.mass soil containing 2-30 mass% particles with a particle diameter of 75 μm or less, and 25-100 pts.mass cement are mixed together. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a soil-based pavement composition, a soil-based pavement construction method, a soil-based wall composition, and a soil-based wall construction method.

  Conventionally, the applicant has proposed the room temperature solidified inorganic material preparations of Patent Documents 1-10. Patent Documents 11 to 13 disclose other preparations. These formulations contain calcium, such as soil and cement, slaked lime.

  These formulations can be ground pavement after being mixed with water and then laid down on the pavement, rolled and cured. Moreover, after mixing these water, after spraying a construction place and curing, these preparations can also become an earthen wall. This earth-based pavement or earth-based wall retains the natural soil atmosphere and exhibits an excellent design.

JP 2000-1347 A JP 2000-1358 A JP 2001-31462 A JP 2000-290058 A JP 2000-203922 A JP 2001-114579 A JP 2001-271306 A JP 2002-87872 A JP 2001-192256 A JP 2004-52536 A Japanese Patent Laid-Open No. 11-302643 Japanese Patent Laid-Open No. 10-1908 JP-A-11-71582

  However, since the conventional soil-based pavement and soil-based wall have high water absorption, when they are constructed in a cold region, they tend to cause frost damage that causes cracking, peeling, scaling, etc. due to freezing, and have high strength and design. It is easily damaged.

  The present invention has been made in view of the above-described conventional situation, and provides a soil-based paving composition and a soil-based wall composition that are not impaired in strength and design when constructed in a cold region. This is a problem to be solved.

  Moreover, this invention also makes it the subject which should be solved to provide the construction method of the earth-type pavement and earth-type wall which do not impair intensity | strength and designability, when it constructs in a cold region.

  The inventors have intensively studied to solve the above problems, and found that the particle size of the soil and the cement content are important for solving the problems, and have completed the present invention.

  The soil-based pavement composition of the first invention is a soil-based pavement formulation that is mixed with water and then spread on the pavement, and is rolled and cured to become a soil-based pavement, having a particle size of 75 μm. 100 mass parts of soil whose following particle | grains are 2-30 mass% and 40-100 mass parts of cement are mixed, It is characterized by the above-mentioned.

Moreover, the construction method of the earth-based pavement of the second invention is for earth-based pavement in which 100 parts by mass of soil whose particle size is 75 μm or less is 2 to 30% by mass and 40 to 100 parts by mass of cement are mixed. A preparation process for preparing the formulation;
The pavement is prepared by mixing water into the soil-based pavement composition to form a pavement, laying the pavement on a pavement, and rolling and curing to make the soil-based pavement. To do.

  According to the test results of the inventors, soil having a particle size of 75 μm or less is 2 to 30% by mass, and 40 to 100 parts by mass of cement is mixed with 100 parts by mass of this soil. When the object is constructed in a cold region, it becomes a soil-based pavement that is unlikely to cause frost damage. The soil can include sand. This is because the soil-based pavement has a lower water absorption than the conventional one and has improved strength. Since a certain amount of cement is used for such soil, it is presumed that the pore structure of the soil-based pavement has changed.

  Therefore, according to the composition for earth-based pavement of the first invention, it is possible to obtain an earth-based pavement whose strength and designability are not impaired when constructed in a cold region. In addition, the construction method of the second invention can provide a soil-based pavement that does not impair strength and design when constructed in a cold region.

Also, if this soil-based pavement composition is adopted, it is possible to obtain pavement by adopting the soil existing in each place, so there is no need to prepare asphalt etc. at the pavement place, greatly reducing transportation energy, Reduction of manufacturing energy and CO ₂ emissions can be realized.

  Although the earth-based pavement may be directly constructed on the roadbed, it is preferably constructed on a roadbed or concrete foundation formed by crushed stone or the like on the roadbed. This is because the roadbed and concrete foundation prevent the earth-based pavement from being deformed or destroyed by the pressing force from the upper surface.

  The earth wall composition of the third invention is an earth wall wall composition that is sprayed on a construction site after being mixed with water and cured to become an earth wall, and particles having a particle size of 75 μm or less are contained. 100 mass parts of soil which is 2-30 mass%, and 25-100 mass parts of cement are mixed, It is characterized by the above-mentioned.

Moreover, the construction method of the earth system wall of 4th invention is for earth system walls formed by mixing 100 mass parts of earth whose particle | grains with a particle size of 75 micrometers or less are 2-30 mass%, and cement 25-100 mass parts. A preparation process for preparing the formulation;
It is characterized by comprising a wall construction process in which water is mixed with the earth wall composition to form a wall material, and the wall material is sprayed to a construction site and cured to form an earth wall.

  According to the test results of the inventors, soil having a particle diameter of 75 μm or less is 2 to 30% by mass, and 25 to 100 parts by mass of cement is mixed with 100 parts by mass of the earth. Objects become earthen walls that are unlikely to cause frost damage when constructed in cold regions. The soil can include sand. This is because the earth-based wall has a lower water absorption than the conventional one and has improved strength. Since a specific amount of cement is used for such soil, it is presumed that the pore structure of the earthen wall has changed.

  Therefore, according to the earth wall composition of the third invention, it is possible to obtain an earth wall that does not impair the strength and design when it is constructed in a cold region. In addition, the construction method according to the fourth aspect of the present invention can provide a soil-based wall whose strength and designability are not impaired when constructed in a cold region.

In addition, if this soil-based wall composition is adopted, the walls can be obtained by using the soil existing in each place, so there is no need to prepare concrete etc. at the construction site, and transportation energy can be greatly reduced, Reduction of manufacturing energy and CO ₂ emissions can be realized.

  The earthen wall is preferably constructed by embedding a reinforcing bar. This is because the reinforcing bars prevent delamination and collapse due to deformation or destruction of the earth wall due to the earthquake.

  In addition, after the construction is performed by spraying the earth wall, the desired design can be obtained by grinding or the like before the cement is hardened.

  Soil generally consists of gravel, sand, silt and clay. The gravel has a particle size exceeding 2000 μm. The sand composed of fine sand, medium sand and coarse sand has a particle size of more than 74 μm and not more than 2000 μm. The silt component has a particle size of more than 5 μm and 75 μm or less. The clay (including colloid) has a particle size of 5 μm or less. Sand is used for concrete, but silt and clay are not used. The soil according to the present invention can be employed as long as the content of silt content or less, that is, the particle size of 75 μm or less is 2 to 30% by mass. Soil existing in various places can be adopted. In addition, the soil may be not only a single one produced at the construction site, but also one mixed with other things.

  According to the test results of the inventors, the soil-based pavement composition and the soil-based wall composition are solidified at room temperature, and are not as expensive as those made of conventional concrete or the like, and are made of only natural soil. Solidify with strength and hardness not as low as those.

  Earth-based paving formulations and earth-based wall formulations may include pigments. The soil paving formulation and the soil wall formulation may also include aggregate. As the aggregate, inorganic waste such as crushed stone, concrete, ceramics, and cullet can be used. Further, the soil paving formulation and the soil wall formulation may also include shrinkage reducing agents, admixtures, primers, and the like.

  Hereinafter, a first embodiment embodying the first and second inventions and a second embodiment embodying the third and fourth inventions will be described with reference to the drawings.

  Each material was prepared with the composition shown in Table 1, and other materials except water were mixed with a mixer to obtain a soil-based paving formulation.

  The soil consists of 59.74 parts by mass of sand and 40.26 parts by mass of crushed stone waste. As shown in FIG. 1, the particle size distribution of the soil includes 1.32% by mass of particles having a particle size of 75 μm or less, and the crushed stone waste soil has 7.23% by mass of particles having a particle size of 75 μm or less. % Is included. The soil obtained by mixing sand and crushed stone waste with the composition shown in Table 1 has a maximum particle size of 10 mm or less, and 3.7% by mass of particles having a particle size of 75 μm or less (breakdown: 0.8% by mass of sand) The crushed stone waste soil is 2.9% by mass). The cement is usually Portland cement. The aggregate consists of 4.05 parts by mass of No. 6 crushed stone having a particle size of 5 to 13 mm and 15.44 parts by mass of No. 7 crushed stone having a particle size of 2.5 to 5 mm.

  Water of the composition shown in Table 1 was added to this soil-based paving preparation, and these were mixed by a mixer to obtain a paving material. This pavement is laid out in a thickness of 7.5-8cm on the pavement where the formwork is installed, and after rolling with a hand guide roller to a thickness of 5cm, cover with a blue vinyl sheet. For 7 days. In addition, the rolling by manual work was also performed as needed. An earth-based pavement was thus obtained.

  Each material was prepared with the formulation shown in Table 1, and other materials except water were mixed with a mixer to obtain a soil wall formulation.

  The soil consists of 35.73 parts by mass of sand and 64.27 parts by mass of crushed stone waste. This soil also has a maximum particle size of 10 mm or less, and 3.4% by mass of particles having a particle size of 75 μm or less (breakdown: 0.8% by mass of sand and 2.6% by mass of crushed stone waste soil).

  Water of the composition shown in Table 1 was added to this earth wall composition, and these were mixed by a mixer to obtain a wall material. After this wall material was sprayed on the construction site where the stainless steel rebar was placed, the surface was manually cut before the wall material hardened and covered with a blue vinyl sheet for 7 days. Thus, an earthen wall was obtained. Other conditions are the same as in the first embodiment.

(Evaluation 1)
A plurality of block-shaped test bodies were cut out from the earth-based pavement prepared in the same manner as in Example 1. As in Example 1, the test product 1 was rolled by a machine. The test product 2 is obtained by rolling a concrete panel and a urethane mat on the surface in order, and then rolling using a vibration plate. The test product 3 is one in which a piece of wood is applied to the surface and rolled by hand by hitting the piece of wood with a hammer. Other conditions are the same as in the first embodiment.

  Each test body was subjected to the following test in accordance with JIS A 1435 “Testing Method for Frost Resistance of Building Exterior Wall Materials”. First, each test body was immersed in water at room temperature for 48 hours. Then, a rubber container was prepared so that the entire surface of each test specimen was always covered with about 3 cm thick water during melting, and each test specimen was placed in the rubber container. Subsequently, each test body was put into the antifreeze liquid tank in the test apparatus together with the rubber container. The test apparatus was operated, and the next freezing process and thawing process were set as one cycle, and 100 cycles were repeated.

  Freezing process: The temperature of the antifreeze is cooled from 18 ° C to -20 ° C in 1 hour. Thereafter, the temperature of the antifreeze is kept at -20 ° C for 1 hour and 45 minutes. Total 2 hours 45 minutes.

  Melting process: Heating is performed for 1 hour so that the temperature of the antifreeze is -20 ° C to 18 ° C. Thereafter, the temperature of the antifreeze is maintained at 18 ° C. for 45 minutes. A total of 1 hour 45 minutes.

  Each test specimen was taken out of the test apparatus every 25 cycles and the appearance was observed, and the mass change rate (%) was measured. The results after 100 cycles are shown in Table 2.

  All of the specimens of the test products 1 to 3 had no significant damage after 100 cycles of freezing and had excellent frost damage resistance. However, there is a concern that white flower and cracks may occur because a mixture containing 64.34 parts by mass of cement in 100 parts by mass of soil is used.

(Evaluation 2)
As a test product 4, a block-shaped test body that was rolled by a machine as in Example 1 was prepared. In addition, a commercially available concrete block type C was prepared as a test body for the test product 5, a commercially available interlocking block was used as a test body for the test product 6, and a commercially available ceramic siding was prepared as a test body for the test product 7.

  Each specimen of test products 4 to 7 was subjected to the same test as in the above evaluation 1, and appearance observation after 30 cycles, 50 cycles, 75 cycles and 100 cycles was performed. The results are shown in Table 3.

  From Table 3, it can be seen that the specimen 4 is higher in frost resistance than the specimens 5 to 7 which are usually used in cold regions. In particular, it can be seen that the test body of the test product 4 has substantially the same performance as the test body of the test product 5 which is a concrete block, with only a slightly higher degree of scaling.

  Therefore, it can be seen that the soil-based pavement of Example 1 and the construction method thereof can construct a soil-based pavement that does not impair the strength and design when it is constructed in a cold region.

(Evaluation 3)
As the test article 8, a plurality of block-shaped test bodies were cut out from the earth wall created in the same manner as in Example 2.

  Each specimen was frozen by leaving it in the air at -20 ° C for 120 minutes, and then dissolved in water at 10 ° C for 60 minutes. This was regarded as one cycle and repeated 300 cycles. The specimen of the test product 8 had no abnormality in appearance observation, and its weight did not change.

  Therefore, it turns out that the earth wall which the intensity | strength and designability are not impaired when it is constructed in a cold district can be constructed also by the earth wall composition of Example 2 and its construction method.

  In the above, the present invention has been described with reference to the first and second embodiments. However, the present invention is not limited to the first and second embodiments, and can be appropriately modified and applied without departing from the spirit of the present invention. Needless to say.

  The first and second inventions can be used for pavements and floors for cold districts, and the third and fourth inventions can be used for inner and outer walls for cold districts.

It is a graph which shows the particle size distribution of the sand used in Example 1, 2 and crushed stone waste soil.

Claims (4)

After mixing with water, it is spread on the pavement, and is a ground-based pavement composition that is rolled and cured to become a soil-based pavement,
A soil-based pavement composition comprising 100 parts by mass of soil containing 2 to 30% by mass of particles having a particle size of 75 μm or less and 40 to 100 parts by mass of cement. A preparation step of preparing a soil-based paving preparation in which 100 parts by mass of soil having a particle size of 75 μm or less is 2 to 30% by mass and 40 to 100 parts by mass of cement are mixed;
The pavement is prepared by mixing water into the soil-based pavement composition to form a pavement, laying the pavement on a pavement, and rolling and curing to make the soil-based pavement. Construction method of soil-based pavement After the water is mixed, it is sprayed to the construction site and cured to become an earthen wall wall,
A soil-based wall preparation characterized in that 100 parts by mass of soil having a particle size of 75 μm or less is 2 to 30% by mass and 25 to 100 parts by mass of cement are mixed. A preparation step of preparing a soil-based wall preparation in which 100 parts by mass of soil having a particle size of 75 μm or less is 2 to 30% by mass and 25 to 100 parts by mass of cement are mixed;
An earth system comprising: a wall construction process comprising mixing water into the earth wall composition to form a wall material, spraying the wall material to a construction site, and curing to form an earth wall Wall construction method.

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