JP2005060177A - Lightweight concrete containing inorganic foamed body and charcoal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a lightweight concrete usable as a greening base material or the like by making it porous so as to increase its surface area and improve its water retentivity, water quality purifying capacity, and deodorizing capacity. <P>SOLUTION: The lightweight concrete 10 contains inorganic foamed body which is prepared by mixing inorganic foamed body 1 and charcoal 2 as aggregate and bonding them with cement 3, and charcoal. A large number of bubbles 4 are placed between the inorganic foamed body 1 and charcoal 2. Foamed glass is used as the inorganic foamed body 1. The mix proportion of the lightweight concrete by weight is as follows: the inorganic foamed body 1-2, charcoal 0.1-0.7, and water 2-0.5 (vs. cement 1). In addition, a proper amount of a water reducing agent is mixed into the lightweight concrete. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lightweight concrete having a large surface area and increased water retention, water purification ability, and deodorizing power by mixing inorganic foam and charcoal into a porous shape.

  Conventionally, lightweight concrete such as single-use concrete of foamed concrete or inorganic foam, charcoal-containing concrete has been used for various applications, but many cements are blended to make up for the lack of strength of these lightweight concretes. It is customary. In addition, the smooth surface finish is generally adopted for molding from the appearance, and the inorganic foam and charcoal are not likely to appear on the surface, so the water retention, water purification ability and deodorizing power of the material are fully utilized. The current situation is not.

With respect to the above, Patent Document 1 discloses a configuration of an activated carbon-containing concrete block in which a concrete base member made of aggregate and cement and a purification member made of activated carbon, sand, and cement are combined. According to such a concrete block, a composite material in which an activated carbon-mixed member having a purification ability is fused with concrete having a high mechanical strength, without using a concrete block whose mechanical strength is reduced by mixing activated carbon alone. By doing so, a concrete block that can be used as a river or lake revetment or a home interior material is provided.
JP 2002-54119 A

  In general, inorganic foam or charcoal has a water purification ability, but if used as it is, there is a problem that it is scattered during use or flows out into water due to insufficient strength. When many cements are blended to make up for the lack of strength, there arises a problem that water retention, water purification ability and deodorizing ability as lightweight concrete are not fully utilized. In addition, when used as a greening base material for rooftop greening or wall surfaces, large strength is not required, and therefore lightweight porous concrete is required. In particular, there is a demand for realization of lightweight porous concrete bonded with a thin coating.

  According to the means described in Patent Document 1, a concrete block that serves both as a river revetment and water purification is provided, and has all the functions of water retention, water purification ability, deodorizing power, etc. Lightweight concrete that can be used as a material cannot be obtained.

  Therefore, the present invention is a lightweight concrete that can be used as a greening base material by increasing the surface area, water retention, water purification ability, and deodorizing power by mixing inorganic foam and charcoal into a porous shape. The purpose is to obtain.

  In order to achieve the above-mentioned object, the present invention is based on a lightweight concrete in which an inorganic foam as an aggregate and charcoal are mixed and bonded by cement, and lightweight concrete mixed with charcoal. Many air bubbles are interposed between the inorganic foam and the charcoal.

  Foam glass is used as the inorganic foam. The blending ratio of the lightweight concrete is 1 to 2 for the inorganic foam, 0.1 to 0.7 for the charcoal, and 2 to 0.5 for the water with respect to the cement 1 in terms of weight ratio. In addition, lightweight concrete is mixed with an appropriate amount of water reducing agent.

  Foamed glass used as an inorganic foam is manufactured by firing waste glass powder, and has a maximum dimension within one half of the minimum dimension of lightweight concrete.

  According to such lightweight concrete, the strength, water permeability, water purification action of charcoal glass as an inorganic foam and the water retention, water purification action, and deodorization action of charcoal are effectively utilized, for river revetment or existing It is effective when installed in a drainage channel or drainage pipe, and can also be used as a greening base material.

  The lightweight concrete according to the present invention is lightweight and porous, and has a large surface area, high water retention, water purification ability, and high deodorizing power. It can be used effectively by installing it in a slope such as a road, a park, a drainage channel, or a drainage pipe. Furthermore, since the surface area and porosity of lightweight concrete are dramatically increased, the absorptivity and growth environment of bacteria and the like are improved, and the water purification effect of the river is greatly enhanced, contributing to the breeding of aquatic animals. it can.

  When lightweight concrete is also used as a greening base material, the growth of plant rhizomes is suppressed, so that the growth of vegetated plants is prevented and the propagation of moss, turf, etc. is not hindered. By adjusting the, plants can be bred to suit the purpose. Furthermore, when it is used as a greening base material, the concrete itself does not scatter or run out, and it can be constructed at a relatively low cost, and maintenance and management costs can be reduced. Moreover, by using lightweight concrete for agricultural waterways, surplus fertilizers such as residual nitrogen and phosphorus in the wastewater can be adsorbed and removed.

  The embodiment of the lightweight concrete which mixed the inorganic foam concerning this invention and charcoal below is described. Since the lightweight concrete of the present invention is porous, it has a large surface area, is excellent in the propagation, fertilization and water retention of soil microorganisms, and can be used as a greening base material for rooftops, etc. as well as usage methods that take advantage of water purification and deodorization. It can be used.

  FIG. 1 is a cross-sectional view of a lightweight concrete 10 manufactured by applying the present invention, and FIG. 2 is a perspective view of the concrete block 11. In the figure, 1 is an inorganic foam as an aggregate formed in a granular form, 2 is charcoal mixed between the inorganic foams, 3 is a cement for bonding the inorganic foam 1 and the charcoal 2, and 4 are many pieces Foam glass can be used as the inorganic foam 1.

  The blending ratio of the lightweight concrete 10 is 1 to 2 for the inorganic foam, 0.1 to 0.7 for the charcoal, 2 to 0.5 for the water, and other appropriate amount of water reducing agent with respect to the cement 1 in weight ratio. The structure is characterized by the formation of a porous structure as a whole by mixing the bubbles 4.

  The foam glass used as the inorganic foam 1 is manufactured by firing powder of waste glass, and the specific gravity is preferably 1.0 or less and the maximum dimension is within one half of the minimum dimension of lightweight concrete. The charcoal 2 is obtained by carbonizing wood materials and other industrial waste such as waste materials. As an example of the shape, a long piece having about 2 cm and a small amount of powder is preferable.

  The concrete block 11 is formed by molding the lightweight concrete 10 into a block body of about 30 cm × 30 cm × 6 cm, and the weight in a dry state in air is about 4700 g. Therefore, the unit weight when commercialized is about 1.0 to 0.7 t. The concrete block 11 has a water absorption weight of about 6400 g and a water absorption amount of about 1700 g. Therefore, the porosity is about 30%.

  FIG. 3 is a cross-sectional view of a principal part showing a state in which the concrete block 11 according to the present invention is used for river revetment, and each concrete block 11 is constructed by laying on a slope with a retaining pile 5 interposed. FIG. 4 is a plan view showing a state in which the concrete blocks 11 are appropriately combined and installed in the existing drainage channel 6, and FIG. 5 is a cross-sectional view thereof. FIG. 6 shows an example in which the lightweight concrete 10 of the present invention is installed in a plane in the drain pipe 7.

  Furthermore, although illustration is omitted, there is no concern that the concrete block 11 itself will scatter or flow out during long-term use by using the concrete block 11 according to the present invention as a cast-in-place or hardened material of the greening base material. It is possible to improve the workability and construct a greening base material at a relatively low price.

  Since the lightweight concrete 10 according to the present invention is mixed with the inorganic foam 1 and the charcoal 2, the degree of porosity is high and the surface area is dramatically higher than that of the lightweight concrete in which only the conventional inorganic foam 1 is mixed. As the adsorption performance increases, the bacterial growth environment becomes better and the water purification function is improved. Therefore, drainage treatment using the drainage pipe 7 can contribute to water quality purification of the river, and it can be used for drainage equipment such as a catchment to purify the water that penetrates underground. The water quality can be improved and the water environment can be well preserved.

The term “porous” means that there is a cavity inside the substance, and it is a known matter that foamed glass or charcoal is a porous substance. The surface area is the total of the outer surface and the partition wall surface area of the cavity constituting the cross section of the substance. Conventionally, the surface area in 1 g of charcoal such as Bincho charcoal is about 300 m ² . Since the lightweight concrete 10 according to the present invention has a high degree of porosity, many cavities serve as a place for microorganisms.

  As described above, the mixing ratio of the lightweight concrete 10 with respect to the cement 1 is 1 to 2 for the inorganic foam, 0.1 to 0.7 for the charcoal, and 2 to 0.5 for the water content. In addition, it is possible to sufficiently withstand even if a heavy object is placed on the upper part of the concrete block 11 or a person rides on the concrete block 11 during the construction. Since it is easy to transport, the workability on the roof is good, and it is not necessary to install an outer frame or the like as in the conventional construction method, and the construction period can be shortened and the construction cost can be reduced.

  In addition, the lightweight concrete 10 is excellent in water permeability, and the root rhizomes of the plant are suppressed to some extent. Therefore, the light concrete 10 prevents the enlargement after vegetation and prevents the propagation of small plants and moss. It can be used effectively as a greening base material. Furthermore, it is possible to manage and cultivate plants according to the purpose by applying fertilization, and it is possible to reduce maintenance costs and management costs by applying to the slopes of rivers, roads, parks and the like. Furthermore, management costs can be reduced by constructing it around the roots of street trees and park trees.

  The effect of preventing the enlargement after vegetation is that the structure of the lightweight concrete 10 itself is porous and the foamed glass or charcoal 2 as the inorganic foam 1 has a high porosity, so that the plant can grow. It means that the growth of enlarged plants like normal arable land cannot be achieved. Therefore, by using the concrete block 11 for river revetment as shown in FIG. 3, the enlargement of the plant is prevented and the effect of protecting the revetment slope is brought about. Particularly at the water's edge, in addition to the water purification effect, a purification effect by the plant rhizomes can be obtained, which can contribute to the breeding of aquatic animals.

  The concrete block 11 according to the present invention can be used as a greening block such as a fence or a retaining wall of a house, or as a greening base material for a structure that is required to be light in a portion that does not require much strength. Furthermore, by planting moss, turf, sedum, and the like on the concrete block 11, it is possible to easily green a building that has conventionally been difficult to plant.

  As a vegetation method, there is a method of directly planting moss, turf, sedum, etc. after installing the concrete block 11 on the roof, or a method of planting on the concrete block 11 in another place and curing and then installing it on the roof. Moreover, after installing the concrete block 11 on another base material, it can also take the method of planting turf etc. by covering with soil.

  As shown in FIG. 4, the concrete blocks 11 are appropriately combined and installed in the existing drainage channel 6, or the lightweight concrete 10 is installed in the drainage pipe 7 in a plane as shown in FIG. Provides a water purification effect. For example, when the concrete block 11 shown in FIG. 4 is implemented in a household drainage channel, the upstream portion is supplied with water that seems to be oily film or milky white washing drainage, but the position where the concrete block 11 is installed It was observed that the transparency in the drainage channel downstream was increased and the oil film disappeared.

  In particular, when drainage passes through a porous cross section such as inorganic foam 1 or charcoal 2, it acts to adsorb particles such as dust, and the concrete block 11 itself is alkaline, so it can be used for purification treatment such as acid rain. Is also suitable. When used for water purification, the concrete block 11 can be used semipermanently by washing and drying it once or twice a month.

  In addition, when the concrete block 11 is used in a water purification facility, the deposits on the concrete block 11 can be easily removed, so that it can be reused repeatedly, thereby reducing construction costs and maintenance costs. it can.

  Furthermore, by using the lightweight concrete 10 for the construction of the agricultural waterway, residual agricultural chemicals in the drainage and surplus fertilizers such as nitrogen and phosphorus are reduced to bring about a proper purification and river purification. Moreover, a water quality purification effect | action is heightened by applying to various products, such as a water tank, a drain ditch, a drain pipe, as a water quality purification material.

  The concrete block 11 is lightweight and completely solidified, and does not cause a problem of being easily destroyed or scattered. For example, for the purpose of deodorization, the floor, a barn and its drainage channel, a pet hut, It can be installed at a garbage collection site and the like, and an environmental improvement effect can be obtained.

  The lightweight concrete according to the present invention is lightweight and porous, and has a large surface area, water retention, water purification ability, and high deodorizing power. It can be installed in drainage channels, drainage pipes, and agricultural channels. Furthermore, since the growth of the rhizomes of the plants is suppressed and the enlargement of the plants is prevented and the propagation of moss, turf and the like is not hindered, it can be effectively used as a greening base material for rooftops and the like.

Sectional drawing of the lightweight concrete produced by applying this invention. The perspective view of the concrete block. The principal part sectional drawing which shows the state which utilized the lightweight concrete concerning this invention for river bank protection. The top view which shows the state which installed the lightweight concrete in the drainage channel. Sectional drawing of FIG. The perspective view which shows the example which installed and used lightweight concrete in a drain pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Inorganic foam 2 ... Charcoal 3 ... Cement 4 ... Bubble 5 ... Retaining pile 6 ... Drainage channel 7 ... Drain pipe 10 ... Lightweight concrete 11 ... Concrete block

Claims (6)

  Lightweight concrete mixed with inorganic foam and charcoal obtained by mixing inorganic foam as an aggregate and charcoal and bonding with cement.   The lightweight concrete mixed with the inorganic foam and charcoal according to claim 1, wherein a large number of air bubbles are interposed between the inorganic foam and charcoal.   The lightweight concrete which mixed the inorganic foam and charcoal of Claim 1 or 2 using the foam glass as an inorganic foam.   Claims 1, 2 or 3 wherein the blending ratio of the lightweight concrete is 1 to 2 for the inorganic foam, 0.1 to 0.7 for charcoal, and 2 to 0.5 for the cement 1 by weight. Lightweight concrete mixed with the described inorganic foam and charcoal.   The lightweight concrete which mixed the inorganic foam and charcoal of Claim 4 which mixed the appropriate amount of water reducing agents with the lightweight concrete.   The foamed glass used as the inorganic foam is manufactured by firing waste glass powder, and the maximum dimension is within half of the minimum dimension as lightweight concrete. Lightweight concrete mixed with the described inorganic foam and charcoal.

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