Design method for mix proportion of recycled aggregate concrete

The invention provides a design method for a mix proportion of recycled aggregate concrete. The design method comprises the following steps of (1) setting a design strength of to-be-prepared recycled aggregate concrete, calculating water-binder ratio, water consumption, cementing material consumption, sand ratio, fine aggregate consumption and coarse aggregate consumption of the recycled aggregate concrete under the design strength, according to a design method regulated in JGJ55-2011 "specification for mix proportion design of ordinary concrete"; (2) primarily determining a mix proportion of the recycled coarse aggregate; (3) primarily determining a mix proportion of the recycled fine aggregate; (4) determining preparation strength of the recycled aggregate concrete; (5) determining a total water consumption of the recycled aggregate concrete; and (6) determining additional water consumption of the recycled aggregate concrete. According to the design method for the mix proportion, a lot of low-quality recycled aggregate and micropowder can be mixed, thereby facilitating application of the recycled aggregate and providing reference and guidance effects for use of the low-quality recycled aggregate.