Precast concrete column with embedded recycled component and construction method therefor

A precast concrete column with an embedded recycled component, comprising recycled components, column longitudinal steel bars, spiral stirrups, ordinary or composite stirrups, first connectors, second connectors, fresh concrete, and grouting sleeves, wherein

• the recycled components are enclosed by the fresh concrete, the recycled component comprises an old stirrup, an old longitudinal steel bar, and old concrete, a height and a cross-sectional width of the recycled component are respectively less than a height and a cross-sectional width of the precast concrete column, and a volume of the recycled component is not less than 40% of a volume of the precast concrete column;
• the column longitudinal steel bar is located within the fresh concrete;
• the grouting sleeve is located below the recycled component;
• an arranging range of the ordinary or composite stirrup is an area where the grouting sleeve is located;
• an arranging range of the spiral stirrup is an area where the grouting sleeve is not located;
• the first connector is made of a steel bar and is configured to connect the old stirrup and the column longitudinal steel bar, and an arranging range of the first connector is an area where the recycled component is located;
• the second connector is made of a steel bar and is configured to connect the old longitudinal steel bar and the column longitudinal steel bar;
• an arranging range of the second connector is an upper longitudinal range of 0-500 mm and a lower longitudinal range of 0-500 mm within an area where the recycled component is located;
• and
• apart from the interior of the grouting sleeve, the fresh concrete is cast around the grouting sleeve, and above, below, and around the recycled component, and the fresh concrete is natural aggregate concrete or recycled aggregate concrete with a maximum coarse aggregate particle size not greater than 20 mm, or recycled aggregate concrete containing recycled sand from excavated soil from construction sites.