Root-resisting waterproof concrete and green roof structure

Abstract

The invention provides root-resisting waterproof concrete and a green roof structure. The concrete comprises the following components: 12-26% of cement, 23.0-25.0% of sand, 4.0-5.0% of water, 42.0-48.0% of gravel, 0.034-0.039% of a water reducer, 0.085-0.104% of an active catalyst, 4.0-7.0% of a fiber, 1.0-3.0% of hydrophobic zeolite and 0.34-0.65% of a root-resisting agent. The green roof structure comprises a structural layer, an insulating layer, a protecting layer, a water discharging layer, a filtering layer and a planting layer in sequence from bottom to top, wherein the protecting layer is made of the concrete. The concrete provided by the invention has root-resisting, waterproof and anti-cracking functions, and is long in service life and low in production cost; the green roof structure is simple, convenient to overhaul, smooth in water discharging, and lower in roof bearing pressure.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a root-blocking waterproof concrete and a green roof structure using the concrete. Background technique [0002] Green roof refers to the roof of a building (including roof, roof, balcony, etc.) or the roof of an underground building that is covered with planting soil to grow plants. It does not occupy land resources, but also can increase the urban greening area, improve air quality, beautify the urban landscape, and at the same time alleviate the urban heat island effect, keep warm in winter and insulate in summer, reduce the temperature fluctuation range of the roof, thereby prolonging the life of the roof and reducing the indoor temperature. Air-conditioning energy consumption and many other advantages have become a new direction for the development of modern architecture, which has attracted the attention of many researchers at home and abroad. [000...

AI Technical Summary

Problems solved by technology

This kind of traditional green roof system not only has a long construction period and heavy roof load, but once leakage occurs, it will make it difficult to find out the leak point and make it difficult to repair. In the end, the entire green roof system may need to be remade

[0005] Chinese patent CN104553170A discloses "a root puncture resistant waterproof coiled material and its preparation method". Using copper foil, it can achieve the effect of preventing root puncture in the aspect perpendicular to the coiled material, but it has a relatively weak point, that is, the coiled material Copper foil is ineffective at the overlapping joints, and the root system is likely to pass through the overlapping joints, destroying the waterproof effect of the waterproof layer

[0006] Chinese patent CN102995843B discloses "a low-maintenance ecological slope roof greening method". In this patent, a protective layer and a root-resistance layer are added on top of the flexible waterproof layer of the traditional roof. The protective layer is generally paved with fine stone concrete. The expansion coefficient and extensibility of the waterproof layer and the root-resistance layer are quite different, and cracks are prone to appear due to thermal expansion and contraction and structural stress. Once cracked and water seeped, plant roots will grow inward along the cracks, resulting in planting roof leakage

Moreover, once this traditional green roof system leaks, it will make it impossible to find out the leak point and make it difficult to repair, and eventually the entire green roof system may need to be remade

[0007] Chinese patent CN102817445A discloses "a self-repairing anti-root puncture concrete waterproof structure and its construction method". In this patent, a layer of organic root-blocking agent is sprayed on the self-repairing rigid waterproof layer to achieve root-blocking effect, but the root-blocking polymer material costs And the construction cost is high, and it does not meet the requirements of concrete durability, and cannot achieve the same life span as the building

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