Steel slag eco-concrete, steel slag eco-concrete product and preparation method thereof

Abstract

The invention discloses steel slag eco-concrete, a steel slag eco-concrete product and a preparation method thereof. The steel slag eco-concrete is prepared from aggregate, cementing agents, water, high molecular additives, microbes and culture media. The weight ratio and the addition range of each ingredient meet the following requirements (through being metered by dry basis weight): aggregate to cementing agents is 3 to 5 / 1, water to cementing agents is 0.25 to 0.65, the microbes and the culture media are additionally added materials according to a mixture ratio of 1 / 1 to 1 / 10, the total addition of the microbes and the culture media is 0.1 to 5 percent of the total addition of the aggregate and the cementing agents, the addition of the high molecular additives accounts for 0.5 to 3 percent of the standard amount of the cementing agents. After the ingredients are stirred, the casting forming is carried out, or the pressing forming is carried out on a brick pressing machine for making concrete or concrete prefabricated blocks, building blocks and bricks with cavities remained in the structure, the void ratio in the structure is between 25 percent and 40 percent, and the void diameter is between 0.01mm and 5mm. The invention has the advantages of directional water purification performance, constructability, high mechanical strength, high underwater stability and low cost, and can be widely used in water body ecological restoration.

Description

Technical field [0001] The invention belongs to the technical field of industrial solid waste utilization and water treatment applications, and specifically is a method for preparing steel slag ecological concrete and steel slag ecological concrete products using steel slag, tailings or other industrial solid wastes as main raw materials. The steel slag ecological concrete and the steel slag ecological concrete product can be widely used in ecological restoration of water bodies. Background technique [0002] Ecological concrete is concrete that has a special structure and function through material selection, addition of functional additives, and a special process. It can reduce environmental load, improve coordination with the ecological environment, and contribute to environmental protection (1995 .Japan Concrete Engineering Association). [0003] Ecological concrete and its products are a new type of environmentally friendly products that have attracted more attention recently....

AI Technical Summary

Problems solved by technology

In 2007, the production of steel slag in my country has reached 65.46 million tons, and it is still increasing every year, while the utilization rate is only 10%. Most of the steel slag is still discarded, which not only occupies farmland, but also pollutes the environment

However, when steel slag is used for hydraulic concrete below the water surface, the concrete immersed in water for a long time will be softened to a certain extent, which will make these destructive stresses suppressed

The hydraulic steel slag tailings mold bag concrete introduced in Chinese patent application 200810233945.2 has such an effect, but due to the blocking effect of the geotextile mold bag, before the geotextile degrades and disappears, the steel slag in the concrete can absorb and remove harmful ions from the water body. The chemical effect cannot be exerted

The above only uses steel slag as a filter material, but does not maximize the water purification effect of steel slag, and does not utilize the gelling properties of steel slag

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