Method for preparing carbon sequestration filler by using waste concrete

Abstract

The invention discloses a method for preparing a carbon sequestration filler by using waste concrete. The method for preparing the carbon sequestration filler by using the waste concrete comprises the following steps of: preparing raw materials: firstly, crushing and grinding blocked waste concrete to respectively obtain concrete aggregate and concrete powder, and preparing an excitation solution and an adsorbent, wherein the excitation solution is composed of sodium carbonate, potassium carbonate and water, the weight ratio of sodium carbonate to potassium carbonate to water is (2-5): (1-5): 100, the adsorbent is composed of a zeolite imidazate framework material and activated carbon, and the weight ratio of the zeolite imidazate framework material to the activated carbon is (3-10): 30; and adding the excitation solution and the adsorbent to the concrete, wherein the activity of substances in the concrete is increased by using the excitation solution, so that the substances can have better carbonization reaction with carbon dioxide, the better carbonization effect is achieved, and the adsorbent can adsorb and fix carbon dioxide in gas through the material characteristics so as to achieve better carbon sequestration effect.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a method for preparing a carbon-fixing filler by using waste concrete. Background technique [0002] Concrete construction has become the mainstream of modern times, and a large amount of waste concrete has been produced in the process. In order to make better use of these waste concrete, a large number of technologies have been produced. For example, the patent application No. 201510031377.8 discloses a construction material A method for manufacturing concrete products with a carbon sequestration function. The invention realizes carbon sequestration while using building materials to prepare concrete products, effectively absorbs carbon dioxide in industrial tail gas, reduces greenhouse gas emissions, alleviates the greenhouse effect, and saves resources and protect the environment. [0003] However, there are also many problems in this method of using building materials to man...

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Problems solved by technology

[0003] However, there are also many problems in this method of using building materials to manufacture concrete products with carbon sequestration functions. For example, it simply passes industrial exhaust gas into the curing room. Due to the relatively stable chemical properties of building materials, the carbonization reaction only It can be carried out in a small range, plus the carbonization time is short, and the carbon dioxide absorption rate is low

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