Ecological foam concrete for roof plant cultivation and preparation method of ecological foam concrete

Abstract

The invention provides ecological foam concrete for roof plant cultivation and a preparation method of the ecological foam concrete. In accordance with a traditional method of making concrete from raw materials of sand, fine aggregates, coarse aggregates and water reducer, the concrete is large in mass and poor in air permeability, lactic acid bacteria ferment powder is used for increasing the air permeability of the concrete, the fermentation time needed by lactic acid bacteria is long, due to the fact that in the production process, the activity of the lactic acid bacteria can be affected at high temperature, fermentation and gas generation of the lactic acid bacteria are affected, optimal selection and improvement are conducted, and water-absorbent expansion resin is utilized for assisting in foaming concrete. Under soaking of water, water absorbent polymer forms a gel expansion body, the volume is increased by multiples, the concrete is loose and beneficial to foaming of a cement foaming agent. Serving as the base material of roof garden plant cultivation, the foam concrete is low in density, and the burden born by a roof is reduced; meanwhile, a porous structure is adopted, and growth and fixation of plant root systems are facilitated.

Description

technical field [0001] The invention relates to the technical field of foam concrete, in particular to an ecological foam concrete used for roof plant cultivation and a preparation method thereof. Background technique [0002] Foamed concrete, also known as foamed concrete, is made by adding a chemical foaming agent or a physical foaming agent to cementitious materials, admixtures, modifiers, brine, etc. , A new type of lightweight thermal insulation material with a large number of closed pores formed by natural conservation. Foam concrete belongs to the bubble-like thermal insulation material, and its outstanding feature is the formation of closed foam pores inside the concrete, which makes the concrete lightweight and thermally insulated. [0003] The roof garden not only has excellent cooling and heat insulation effects, but also can beautify the environment, purify the air, improve the local microclimate, alleviate the urban "heat island" phenomenon, enrich the city's p...

AI Technical Summary

Problems solved by technology

The light green roof system proposed by the present invention adopts the porous ecological concrete cultivation matrix structure layer, which can replace the protective layer, water retention layer, soil layer and planting matrix layer of the traditional roof greening system, and the static load is as light as 120kg / m2, but due to It is made of cement, and its drainage performance is not good, and it needs to be knocked out or refilled for maintenance. The drainage is not good, and it is not conducive to the growth of plant roots

[0008] Chinese Invention Patent Application No. 201611038397.9 discloses a high-water-retaining light-weight vegetation concrete and its preparation and use methods. Using a new type of concrete technology, the number of capillary pores in the vegetation concrete is increased through a series of means, and the water retention of the vegetation concrete is improved. The survival rate in vegetation concrete reduces the density of vegetation concrete through light materials and enhances the safety of ecological concrete retaining walls. It uses concrete and plant growth substrates to mix to obtain a concrete that is conducive to plant growth, but although it Bamboo fibers are added to increase the air permeability of the substrate and enhance the fertility of the substrate. However, because it is still made of a large amount of cement and sand, the resulting concrete has a high density and is not suitable for roof planting.

[0009] According to the above, the traditional way is to make concrete with raw materials such as sand, fine aggregate, coarse aggregate, and water reducing agent, but the quality of such concrete is relatively large, and the air permeability is not good. Lactic acid bacteria fermentation powder is also used to increase the air permeability of concrete. However, the fermentation time of lactic acid bacteria is long, and the high temperature in the production process will affect the activity of lactic acid bacteria, affecting the fermentation and gas production of lactic acid bacteria; the use of porous ecological concrete cultivation substrate structure layer can replace the protective layer of traditional roof greening system, The static load of the water-retaining layer, soil layer and planting substrate layer is as light as 120kg / m2, but because it is made of cement, the drainage performance is not good, and it needs to be knocked out or refilled for maintenance. The drainage is not good, and it is not conducive to The growth of plant roots; adding bamboo fiber to the matrix increases the air permeability of the matrix and enhances the fertility of the matrix. However, because it is still made of a large amount of cement and sand, the resulting concrete is dense and not suitable for the roof. planting use