Research on the preparation of recyclable ultra-high performance concrete based on accelerated carbonization
LI Bing
YANG Tengyu
LIU Lang
SHU Ben'an
QIU Wenjun
Abstract：This study proposes a preparation method for recyclable ultra-high performance concrete(UHPC)based on acceler-ated carbonization.Firstly,recycled UHPC aggregates(C120R)were obtained by crushing and sieving UHPC mortar specimens with strength of 120 MPa.Then,carbonized recycled UHPC aggregate(C120C)was obtained by using carbonization modification to en-hance C120R;On this basis,C120R and C120C were incorporated into the UHPC design system through dense packing theory,thereby exploring the impact of accelerated carbonization on the properties of C120R and the impacts of C120R and C120C on the various properties of UHPC.The results indicate that accelerated carbonization treatment can significantly optimize the crushing val-ue of C120R and improve the surface mechanical property of C120C.The flowability of C120C-UHPC decreases;the impact resis-tance is basically stable;and the compressive strength and volume stability slightly decrease.In addition,accelerated carbonization treatment can optimize the pore structure of UHPC.
Keywords：recyclable UHPCclean building materialsaccelerated carbonizationcarbonized recycled UHPC aggregate
Publication Date：2023-11-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 53-57 )