CN201315774Y - Water-permeable and water retention building bock for roof greening - Google Patents

Abstract

The utility model provides a water-permeable and water-retaining building block used for roof greening drainage layers. It solves the dual needs of roof green drainage and water retention and drought resistance. It mainly includes large-pore concrete blocks made of single-graded coarse aggregate. Several water storage boxes are pre-embedded on the upper surface of the block, and one to several discharge grooves are arranged on the lower surface; hole. When it rains, the rainwater infiltrates from the planting layer, passes through the filter layer, part of it enters the cavity of the water storage box through the small hole on the water storage box, and part of it seeps down through the large hole of the block and gathers in the discharge groove to form a Drain the roof through the drain channel. The rainwater in the water storage box can be absorbed by the roots of the plants in times of drought. If the utility model is made of lightweight aggregates such as ceramsite, the purposes of drainage, heat insulation, water retention and light weight can be realized. It is easy to make, cheap and easy to install, and is an ideal material for the roof greening drainage layer.

Description

Water-permeable and water-retaining blocks for roof greening

technical field

The utility model relates to a building material, in particular to a water-permeable and water-retaining building block for roof greening.

technical background

The structure of a green roof is generally a structural layer, a waterproof layer, a drainage layer, a filter layer, a planting layer and vegetation on it. In the existing technology, the drainage layer generally uses bulk materials, such as gravel, pumice, ceramsite, etc., and its purpose is to eliminate excessive water accumulation on the roof during heavy rain, so as to facilitate roof waterproofing and the growth of green plants on the roof . Bulk materials have the disadvantages that they need to be leveled on site, and the flatness is not easy to maintain during the construction process. Moreover, bulk materials can only hold very little water, which is not conducive to plant drought resistance.

Contents of the invention

The object of the present invention is to provide a block used for the roof greening drainage layer, which has a certain strength, can not only eliminate excessive water accumulation on the roof, but also keep a certain amount of water.

The main body of the utility model is a cement-based large-porous concrete block made of single-graded coarse aggregate, and one to several drainage grooves are arranged on the lower surface of the block to facilitate the removal of excessive roof water; several plastic deposits are pre-buried on the upper surface The water box has a number of holes on the upper surface of the water storage box for rainwater to enter. The pre-embedded position of the water storage box is staggered with the discharge groove.

The aggregate used in the utility model is a single-graded aggregate with a particle size range of 5-20 cm, which can be pebbles, crushed stones, ceramsite, pumice and the like. When made of lightweight aggregates such as ceramsite, pumice, and expanded shale, the weight of the block can be reduced. The cement used can be ordinary Portland cement or low-alkali cement.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is a perspective view of the utility model. In this figure, the water storage box on the upper surface of the block can be seen.

Fig. 2 is an inverted perspective view of the utility model. The figure shows the drainage channels on the lower face of the blocks.

Fig. 3 is a schematic perspective view of the water storage box.

Fig. 4 is an inverted perspective view of another solution of the present utility model. In this figure, we can see the discharge grooves on the lower surface of the block, and the discharge grooves are arranged in two directions.

Fig. 5 is a schematic diagram of installation of the utility model on the roof.

A-A is the A-A cross-sectional schematic view of the utility model as shown in FIG. 1 .

The B-B view is a schematic cross-sectional view of the water storage box along the B-B direction.

The C-C view is a schematic cross-sectional view of the water storage box along the C-C direction.

Detailed ways

As shown in Figure 1, Figure 2, Figure 4 and related cross-sectional schematic diagrams: a permeable and water-retaining block for roof greening, including a block 1, which is in the shape of a cuboid or a cube, and a number of water storage boxes 2 are pre-embedded on the upper surface of the block 1. The upper surface of the water storage box 2 is flush with the upper surface of the building block 1, the distance between the water storage boxes is greater than 30mm, and the four sides are greater than 20mm around the masonry. One to several discharge grooves 3 are arranged on the lower surface of the block 1 . The discharge grooves 3 can be arranged in a single direction, as shown in FIG. 2 ; they can also be arranged in two directions, as shown in FIG. 4 . The discharge groove 3 can be rectangular, "V", arc or trapezoid; its depth is greater than 1cm, less than 1/2 of the block thickness.

The main body of the utility model is a large-porous concrete block made of single-graded aggregate with a particle diameter in the range of 5-20 cm. The compressive strength of the block is greater than 5Mpa. The aggregates used can be pebbles, crushed stones, ceramsite, pumice, etc. When made of lightweight aggregates such as ceramsite, pumice, and expanded shale, the weight of the block can be reduced. The cement used can be ordinary Portland cement or low-alkali cement.

As shown in Figure 3, the water storage box 2 is made of plastic, and its shape is a cuboid, with a height greater than 2 cm, less than 1/2 of the height of the block 1, and a width less than the size 2S/3 shown in Figure 1 . There are several circular apertures 4 on the upper surface of the water storage box 2, and the aperture is greater than 5mm and less than 10mm. The box wall thickness is 4-20mm.

The installation of the present utility model is as shown in Figure 5, and block 1 is installed on the waterproof layer 6, and below the waterproof layer 6 is structural layer 5. A filter layer 7 is laid on the block 1, a planting layer 8 is arranged on the filter layer 7, and plants 9 are arranged on the planting layer 8. During installation, the discharge grooves 3 of adjacent blocks correspond to each other to form a discharge channel.

When it rains, the rainwater infiltrates from the planting layer 8, passes through the filter layer 7, part of it enters the cavity of the water storage box 2 through the small hole 4, and part of it infiltrates from the large hole of the block 1, and gathers to the drain The roof is discharged from the drain channel formed by the groove 3. The rainwater in the water storage box 2 can be absorbed by the root system of the plant when it is dry.

The utility model has the functions of drainage, heat insulation and water retention, and can also realize lightness if it is made of lightweight aggregate. It is easy to make, cheap and easy to install, and is an ideal material for the roof greening drainage layer.

Claims (2)

1. A water-permeable and water-retaining block for roof greening, characterized in that: a cuboid or cube block (1) made of permeable macroporous concrete, with a water storage box ( 2), the lower surface is provided with a discharge groove (3), and the upper surface of the water storage box (2) is flush with the upper surface of the block (1); the distance between the water storage boxes (2) is greater than 30mm, and the The circumference of the body is greater than 20mm; The discharge groove (3) has a depth greater than 10mm and is less than 1/2 of the thickness of the block (1), and is arranged on the lower surface of the block (1) in one or two directions. 2. A water-permeable and water-retaining building block for roof greening according to claim 1, characterized in that: the water storage box (2) is a cuboid, with circular holes (4) on the upper surface, the diameter of which is larger than 5mm, less than 10mm.

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