CN1554220A - Plant growth type porous concrete spherical block - Google Patents

Abstract

The plant-growing porous concrete spherical block is a prefabricated part for civil engineering, transportation and water conservancy engineering. The part between the four frustums of cones 2 is a solid core 4. The raw materials of the block are cement, gravel, mineral admixture, and high-performance water reducer, and its mix ratio is composed of cement 150-360kg/m ³ , 10-20mm single particle size gravel 1400-1800kg/m ³ , mineral The admixture is 10-180kg/m ³ , the water-binder ratio is 0.2-0.3, and the high-performance water reducer is 0.5-5.0% of the cementing material. It is stirred by a mixer, pressed or vibrated or compacted. The block is made of porous concrete with high porosity (20-30%), and has high strength and strong corrosion resistance. Because there are continuous voids inside the concrete block, it has good water permeability and air permeability, which can make Plants with a certain root system grow in it.

Description

Plant growth type porous concrete spherical block

Technical field

The invention is a prefabricated part used in civil engineering, transportation and water conservancy engineering, which belongs to the category of civil engineering materials.

technology field.

Background technique

In the construction of transportation and water conservancy projects, the current revetment and road slope protection technologies mainly use ordinary concrete or ordinary concrete blocks for pavement, which will destroy the original regional ecological environment such as soil and vegetation in nature, thereby affecting the area. Plant and animal growth. In some occasions, lattice concrete blocks are used to fill the square holes of the lattice blocks with soil and sow grass seeds, but this technology is not suitable for revetments where the water level changes.

The reason why plants can grow in the soil is that the soil has a high porosity (25--30%), and the soil has air permeability and water retention, and a suitable pH can provide the space and necessary nutrients for plant growth. , but the soil strength is low and the erosion resistance is weak, which is not conducive to the stability of revetment or slope revetment.

Contents of Invention

Technical problem: The purpose of this invention is to provide a kind of porous concrete spherical block capable of growing plants, which has continuous voids and required porosity, so that plants can grow, microorganisms and small animals in the porous concrete block. Can inhabit porous concrete blocks.

Technical solution: One of the keys to the preparation technology of plant-growing porous concrete spherical blocks is to select appropriate cementing materials, aggregates, mineral admixtures and chemical admixtures and their dosages. In the plant growth type porous concrete, since a thin layer of cement slurry is bonded on the surface of the aggregate, the shape of the void inside the porous concrete basically depends on the shape of the void formed by the accumulation of the aggregate, and the size of the void ratio is related to the The size of the aggregate is related to the filling degree of the cement slurry, and the strength of the porous concrete mainly depends on the strength of the aggregate and the performance of the cement between the aggregates. Therefore, the block is composed of four parts with spherical crowns at the top and truncated cones at the bottom, which are symmetrical to the layout of the conical central hole, and the parts between the four truncated cones are solid cores.

The present invention adopts 10-20mm single particle size crushed stone, portland cement of grade 42.5 and above, mineral admixtures (such as ground ore powder, silicon powder, superfine fly ash), chemical admixtures (water reduction rate of 20% above) to prepare porous concrete. The compressive strength of porous concrete prepared according to the above ratio is between 15 and 25 MPa, and the porosity is between 15 and 25 MPa.

Between 20 and 30%. Mixing ratio: cement 150-360kg/m ³ , gravel 1400-1800kg/m ³ , mineral admixture 10-180kg/m ³ , water-binder ratio 0.2-0.3, high-performance water reducer 0.5-5.0 of the amount of cement %. Use a mixer to stir, press or vibrate or tamp to shape.

The appearance of the plant-growing porous concrete spherical block is also one of the keys of the present invention. The block of the present invention is composed of four parts with a spherical crown at the top and a truncated cone at the bottom, which are symmetrical to the layout of the conical central hole. After the spherical blocks are paved, a lot of space is left between the spherical blocks, so plants can not only grow in the porous concrete and the reserved holes in the middle of the blocks, but also grow in the space between the spherical blocks, Can give full play to its ecological effect.

Beneficial effects: the plant growth type porous concrete block is made of porous concrete with high porosity (20-30%), has high strength and strong erosion resistance, and has good water permeability due to the continuous voids inside the concrete block It has good air permeability and air permeability, which can make plants with a certain root system grow in it. The use of plant-growing porous concrete blocks for bank revetment or slope revetment not only has the characteristics of traditional concrete bank revetment or slope revetment, but also improves the surrounding atmospheric environment and maintains the green natural landscape because of the green plants growing on the surface of the porous concrete. Thereby building a natural ecological revetment or revetment. At the same time, microorganisms and small animals live on the uneven surface or continuous voids of porous concrete blocks, which is extremely important for protecting biological diversity.

The porosity of the porous concrete spherical block prepared by the present invention is between 20% and 30%. After the block is paved according to engineering requirements, a high-pressure spray gun is used to spray the necessary nutrient matrix for plant growth into the inside of the spherical block (can be simultaneously Spray into the seeds), and after a certain period of time, they can germinate.

In addition, since the blocks of the present invention are spherical in shape, spaces are left between the blocks during paving, and there are round holes through the middle of the spherical blocks, which can be filled with nutritious soil, sow grass seeds or plant plants. , when the vegetation reaches a certain coverage rate, an ecological slope protection with landscape effect will be formed.

The blocks of the present invention are composed of four spheres, and compared with a single sphere block, the production efficiency is high, the construction and paving speed is fast, and the connectors between the blocks are reduced at the same time.

Description of drawings

Fig. 1 is a three-dimensional schematic view of the overall structure of the present invention.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a schematic diagram of the cross-sectional structure along the line A-A in Fig. 2 .

Fig. 4 is a schematic cross-sectional structure diagram taken along the direction B-B in Fig. 2 .

Fig. 5 is a schematic cross-sectional structure diagram taken along C-C in Fig. 2 .

There are spherical crown 1, conical frustum 2, conical central hole 3, solid core 4 in the above figure.

Detailed ways

The block is composed of four parts with a spherical crown 1 at the top and a truncated cone 2 at the bottom, which are arranged symmetrically with the conical central hole 3 , and the parts between the four truncated cones 2 are solid cores 4 .

The present invention adopts 10-20mm single-grain size crushing powder, with an amount of 1400-1800kg/ ^m3 ; Portland cement of grade 42.5 and above, with an amount of 150-360kg/ ^m3 ; mineral admixtures (such as ground ore powder, silicon powder, Superfine fly ash), the dosage is 10-180kg/m ³ ; the high-performance water reducing agent (water reducing rate is more than 20%), the dosage is 0.5-5.0% of the cementing material dosage. The compressive strength of the porous concrete prepared according to the above ratio is between 15-25MPa, and the porosity is between 20-30%. Use a mixer to stir, press or vibrate or tamp to form.

For example: variety and dosage of various raw materials: 42.5 grade Portland cement 280kg/m ³ ; silicon powder 20kg/m ³ , S95 finely ground mineral powder 25kg/m ³ ; basalt crushed stone (particle size 10-20mm) 1600kg/m ³ ; water 78kg/m ³ ; superplasticizer 1.8kg/m ³ ; water-binder ratio 0.24. The 28d compressive strength of the porous concrete prepared according to this mix ratio is 18MPa, and the porosity is 25%.

Claims (2)

1, a kind of planting type porous concrete ball sheet piling, it is characterized in that this building block is formed by to be spherical crown (1), bottom be symmetrical in conical central hole (3) layout by the part of the frustum of a cone (2) at four tops, the part between four frustums of a cone (2) is real core body (4).

2, planting type porous concrete ball sheet piling according to claim 1 is characterized in that the material of this building block consists of cement 150～360kg/m ³, 10～20mm simple grain footpath rubble 1400～1800kg/m ³, mineral additive 10～180kg/m ³, water-cement ratio 0.2～0.3, high-performance water reducing agent are 0.5～5.0% of agglutination material consumption, adopt agitator to stir compacting or vibration or tamping moulding.

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