A joint plate for concrete structures with a structure that suppresses the growth of weeds in the joint area

Abstract

To provide a joint plate which suppresses the occurrence of gaps in joints provided to cushion the expansion and contraction of concrete pavement and inhibits the growth of plants such as weeds that live in the joints. [Solution] In joints in concrete pavement 4 that accommodate expansion and contraction of concrete, and in joints intended for drainage, a resin cap 1 with arm-shaped or spherical ribs is used in combination with the upper part of a bituminous fiber joint board 2. This combination reduces gaps in the joints and exerts a weed-preventing effect by combining the adaptability to expansion and contraction of concrete that the bituminous fiber joint board has with a resin cap that has both weed-preventing and concrete-sliding following properties.

Description

[Technical field]

[0001] This invention is a joint plate for concrete structures that has been given the ability to suppress the growth of weeds and other plants by molding a joint for concrete structures. [Background technology]

[0002] Concrete is used in road pavements, such as roadway pavements, sidewalk pavements, and median strip pavements. In the case of concrete pavements, the concrete structure has the property of expanding and contracting, and as a plastic body, concrete structures can self-destruct due to their own expansion and contraction. In order to mitigate this phenomenon, expansion joints are installed.

[0003] However, because the joints are intended to cushion the sliding of the concrete, gaps inevitably occur between the concrete structure and the joints.

[0004] The gaps that occur between the concrete and the joints provide an environment for weeds and other plants to grow.

[0005] Summary of the Invention [Problem to be solved by the invention]

[0006] The gaps between the concrete structures and the joints cannot be completely sealed, allowing weeds and other plants to take root and obstruct passage, impair visibility, and become a source of pests. Currently, weeding work is required several times a year.

[0007] In addition, in some areas, such as median strips and roads, it is not possible to block off traffic, regardless of whether they are roadways or sidewalks, which makes it difficult to manage weeds and other issues. [Means for solving the problem]

[0008] This device adds the purpose of weed prevention by attaching a molded resin cap to a joint board used as a joint board for concrete structures.

[0009] By providing a molded resin cap with ribs of at least 5 mm in length, the properties of plants can be utilized to achieve the purpose of weed prevention. Effect of the Invention

[0010] As described above, a bituminous fiber joint plate, which has a very high affinity with concrete, is used as a joint plate for concrete structures, and by molding it integrally with a resin cap with arm-shaped and spherical ribs, it creates an environment where tall plants cannot grow, thereby acting as a weed control device.

[0011] Plants grow through photosynthesis using light and water as components, but by using a ribbed resin cap in combination with a bituminous fiber joint board that has high compatibility with concrete, the light and water necessary for plant growth are not provided in sufficient quantities, inhibiting plant growth.

[0012] Since it is a known fact that plant growth is achieved through photosynthesis, which requires light and water, plant growth is dependent on the growth of shoots and roots, and plant shoots have a property called gravitropism, whereby they grow upwards in search of light, while roots grow downwards in search of water. By utilizing this property and providing growth inhibition points on the ribs of the resin cap, plant growth is inhibited.

[0013] Plant shoots and roots have cells called growing points, which are said to be several microns in size to a maximum of 0.2 mm, so growth is inhibited by creating mutations larger than the size of these growing points.

[0014] Controlling the expansion and contraction of concrete in concrete and asphalt pavements The joint plate cap ribs are designed to prevent gaps from forming between the concrete and the joint plate installed for cushioning purposes due to the expansion and contraction of concrete. By providing arm-shaped or spherical joint points with the concrete, the side of the resin cap can follow the expansion and contraction of the concrete to control the gaps, thereby restricting the photosynthesis and hydration necessary for plant growth and controlling plant growth. [Brief description of the drawings]

[0015] [Figure 1] This is a combination of the concrete structure joint plate of this invention and a resin cap. [Diagram 2] The resin cap of this invention has a structure with ribs of 5 mm or more, with an upward slope greater than the thickness of the material, and is an example of a concrete pavement. [Diagram 3] This invention uses a resin cap with a sphere at the tip of the rib that is more than twice the thickness of the rib to enhance the weed-prevention effect and suppress the movement of the resin cap. This is an example of a concrete pavement application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] When constructing concrete pavement for parking lots, etc., the base is prepared using crushed stone or the like, and then a bituminous fiber joint plate covered with the resin cap of this invention is installed, and concrete is then poured to create a joint that can accommodate the expansion and contraction of the concrete pavement. EXAMPLES

[0017] The description will be given with reference to the attached drawings. The joint locations of concrete pavements for roads, parking lots, plazas, etc. are determined by design documents, and they must be installed accurately to maintain the performance of the concrete pavement. After installation is complete, concrete is poured, and after sufficient hardening, joints that cushion the expansion and contraction of the concrete are formed. [Explanation of symbols]

[0018] 1 Resin cap with arm-shaped ribs 2 Bituminous fiber joint board 3 Resin cap with spherical protrusions at the ends of the ribs 4. Cast concrete pavement 5 Base material

Claims

1. A joint plate installed in concrete and asphalt pavements to cushion the expansion and contraction of concrete and to suppress the growth of weeds and other plants in the joints.

2. A joint plate installed in concrete and asphalt pavements to cushion the expansion and contraction of concrete and prevent the occurrence of gaps due to the expansion and contraction of concrete.

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