Reuse method of construction waste materials in coastal and island areas

Abstract

The invention discloses a reutilization method for building debris at coastal and island areas. The method includes the steps that a, concrete debris formed after dismantling buildings is smashed, subjected to impurity removal and classified to form coarse aggregate, and the coarse aggregate is mixed with fine aggregate to form recycled concrete aggregate; b, formworks (1) used for concrete pouring are manufactured; c, a reinforcement cage (8) is bound, all the formworks (1) are set up, and a conductive net (11) is arranged on the inner side of the reinforcement cage (8); d, the concrete aggregate is poured and smashed to form a concrete structure (6), after 2-4 days, a pulling plate is pulled out of a sliding groove from an opening in the side face of each formwork (1), then sealing strips (5) are inserted into openings of the sliding grooves to form a sealed chamber, and an electrolyte solution (7) is poured into the chamber through a solution inlet of the chamber; and e, the formworks (1) are removed. By means of the reutilization method, the chloride ion concentration of sea sand can be effectively lowered.

Description

technical field [0001] The invention relates to the field of recycling and reusing concrete aggregates, specifically a method for reusing building waste materials in coastal and island areas. Background technique [0002] As the building has been in service for too long, various structural and safety problems have occurred, and it needs to be scrapped and demolished. After the demolition, a large amount of concrete waste will be generated, and the accumulation of it will pollute the environment. The traditional treatment method is to crush concrete waste, remove impurities and classify it, and mix it as coarse aggregate with fine aggregate such as sand and fly ash to form recycled aggregate for reuse. However, due to long-term sea wind or seawater erosion and other factors, the buildings in coastal and island areas have a high concentration of chloride ions. Therefore, aggregates regenerated from concrete waste in these areas cannot be reused as reinforced concrete aggregate...

AI Technical Summary

Problems solved by technology

However, due to long-term sea wind or seawater erosion and other factors, the buildings in coastal and island areas have a high concentration of chloride ions. Therefore, aggregates regenerated from concrete waste in these areas cannot be reused as reinforced concrete aggregates, and can only be used as The basic aggregate without steel structure is used for paving, and the degree of reuse is very low, or it is directly buried, which will occupy a large amount of land, cause environmental pollution, and lead to serious waste of resources, which is not in line with the concept of sustainable development

[0003] In order to solve the above-mentioned problems, it is natural that some people propose the idea of ​​dechlorinating the recycled aggregate of the concrete waste of the above-mentioned building, but the concentration of chloride ions in the above-mentioned recycled aggregate is too large, and the existing dechlorination technology such as electromigration It is difficult to reduce its chloride ion concentration to a range that meets the safety standards for reinforced concrete structures

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