Research on Mechanical Properties and Carbon Reduction of Low Carbon UHPC Based on Utilization of Recycled Materials
;Based on the resource recovery technology of waste concrete,recycled aggregates and recycled fine powder are produced,and they are used to replace quartz sand and cement to manufacture low-carbon ultra high performance concrete(UHPC).Through mechanical experiments and carbon reduction research,the results indicate that the replacement of quartz sand with recycled aggregate(＜30％)results in a limited reduction in UHPC compressive strength.Regenerated fine powder(＜25％)replaces cement,and the reduction in UHPC compressive strength is limited.If the content exceeds 25％,it will reduce the working performance and compressive strength of the UHPC matrix.By mixing recycled aggregate and recycled fine powder(＜5％),the compressive strength of UHPC remains unchanged.While maintaining the basic mechanical properties of UHPC,recycled fine powder(＜25％)can replace cement or recycled aggregate(＜30％)instead of quartz sand.In the production stage,the cost of UHPC can be reduced by more than 5％per unit.Considering government subsidies for recycled materials and economic carbon reduction indicators,the cost can be reduced by up to 10％.Regenerated fine powder(＜25％)can replace cement and reduce carbon emissions by 15％per unit during the production stage.Therefore,using recycled materials to produce low-carbon UHPC can effectively reduce the production cost and carbon emissions,facilitate the promotion of UHPC,and assist in ecological construction.
recycled materialsultra high performance concrete(UHPC)carbon reductiontestresoure
万方数据
维普
