JPS6324186Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of Application of the Invention The present invention relates to a floor pavement structure for wetland areas, and more particularly to a pavement structure that is resistant to the phenomenon of blistering of the floor surface due to moisture.

Conventional technology and its problems Concrete is a microporous structure with minute voids and pores, so it cannot be poured in low water level areas, wetlands, or poorly drained areas (hereinafter collectively referred to as "wetlands"). When this happens, underground water will inevitably permeate and rise inside the building structure due to capillary action. Therefore, if the concrete base is covered with an impermeable flooring material or paving layer such as resin, rubber, or ceramics,
The rising moisture or water vapor therefrom exerts pressure on the flooring or pavement layer, causing the latter to blister. This blister has a diameter of
They vary from minute ones of about 0.5 mmφ to large ones of about 5 to 10 cmφ, but they generally occur locally concentrated and often scattered in a nebula-like manner.

The root cause of the occurrence of blisters mentioned above is due to the hydrophilicity and porosity of the concrete itself, but since these properties are the nature of concrete, it is difficult to effectively prevent the penetration and rise of moisture in the area where concrete is placed in wetlands. There is still no known way to prevent it. In addition to wetlands, similar problems occur when impermeable pavement is applied before the underlying concrete has dried.

Purpose of the invention The purpose of the invention is to provide an effective means for suppressing the occurrence of blisters on impermeable floors of concrete structures in wetlands or during early paving.

Means for Achieving the Objective In order to achieve the above objective, the floor pavement structure for wetlands according to the present invention has a concrete base layer as a lower layer and an impermeable surface pavement layer as an upper layer. They are characterized by being mutually integrated by a rigid bonding layer made of synthetic resin containing fine aggregate. That is, the present invention connects the concrete base and the upper surface pavement layer to each other through an intermediate layer, a rigid microporous bonding layer made of synthetic resin containing a large amount of fine aggregate. The main idea is to attenuate the expansion pressure or water vapor pressure of water within the bonded layer.

In the above configuration, the bonding layer is microporous itself and has sufficient mechanical strength to withstand the water vapor pressure acting from the underlying layer in order to attenuate water pressure or water vapor pressure from the underlying layer below. rigidity). For this reason, this layer is usually made of a bulk polymerizable uncured liquid synthetic resin material, preferably an epoxy resin, an unsaturated polyester resin, or a urethane resin, and a mixture of sand such as silica sand, washed sand, anhydrite, etc., or glass beads. It is painted and formed to a thickness of 2 to 4 mm using a so-called "resin mortar" in which coarse aggregate is mixed in a ratio of 1:4 to 1:15 (Example 1). Alternatively, the amount of aggregate may be reduced, and the main resin may be a mixture of fine aggregate of silica sand No. 6 or No. 7 at a volume ratio of 30% or more to the resin material (Example 2). .

Function The intermediate bonding layer of the present invention tightly connects and integrates the concrete base layer below and the pavement layer above, and forms a strong integrated structure as a whole. In addition, this layer itself has countless micropores or microscopic voids, and these micropores and microscopic voids disperse and attenuate water pressure and water vapor pressure, so local pressure concentration on the upper pavement layer is suppressed. This combined with the mechanical strength of the resin mortar layer effectively prevents the occurrence of blisters.

Examples Hereinafter, embodiments of the invention will be illustrated by means of two examples, but the examples are of course for illustrative purposes and are not intended to limit the idea of the invention.

Embodiment 1 FIG. 1 is a partial cross-sectional view of a floor pavement structure for a wetland area, showing an example in which the invention is applied to the repair of blistering parts on a concrete floor of a factory in a wetland area.

In this example, after scraping off the surface pavement of the repair area and polishing and cleaning the exposed surface of the concrete base 1, epoxy resin is applied to the surface to form a primer layer 4, and silica sand 7 is further applied on the surface. A resin mortar made by mixing 6 parts by weight of mixed silica sand of Nos. to No. 4 (the same applies hereinafter) and 1 part of epoxy resin is spread to form a bonding layer 2, and finally the surface of the layer 2 is coated with colored epoxy paint. By applying this to form the surface pavement layer 3, the proposed wetland floor pavement structure was constructed.

This structure has not had any recurrence of blisters since its construction.

Example 2 FIG. 2 is a sectional view similar to FIG. 1 showing an example in which the invention is applied to a concrete floor of a new construction in a wetland area.

The structure of this example has the following points: The aggregate constituting the bonding layer 2 is a mixed silica sand of No. 7 and No. 6 silica sand, and the mixing ratio to the epoxy resin is 30% by volume (that is, the aggregate is made mainly of epoxy resin. It differs from the previous example in several respects, such as the absence of a primer layer 4 and the fact that the pavement layer 3 is a polyvinyl chloride sheet.

The structure of this example has not generated any blisters even one year after construction.

Effects of the invention As explained above, the present invention provides an effective means for suppressing the occurrence of blisters on impermeable floors of concrete structures in wetlands, etc. It can solve problems in architecture.

[Brief explanation of the drawing]

FIGS. 1 and 2 are partial cross-sectional views of floor pavement structures showing respective embodiments of the invention. The meanings of the symbols in the figure are as follows: 1: Concrete base layer, 2: Bonding layer, 3: Surface pavement layer, 4: Primer layer.

Claims (1)

[Scope of utility model registration request] The lower concrete base and the upper impermeable surface pavement layer are mutually integrated by a rigid microporous bonding layer made of synthetic resin containing a large amount of fine aggregate interposed between the two layers. Features: Floor pavement structure for wetlands.