The influence of maintenance temperature on the mechanical properties of UHPC
HOU Qinggang
QIAO Dawei
HU Fengjiao
JIANG Xueni
ZHANG Aiqin
WANG Risheng
Abstract：To analyze the influence of standard maintenance(20 ℃)and high-temperature maintenance(70 ℃)on the mechanical properties of ultra-high performance concrete(UHPC),compressive tests,rupture tests,tensile strength tests,and elastic modulus tests are conducted on UHPC samples with different mix proportions under different maintenance methods and maintenance ages(3,7,28 days).The results indicate that high-temperature maintenance effectively improves the mechanical properties of UHPC.The increase in compressive strength is uniform,with a significant increase in rupture strength.The greatest increase in compressive and rupture strength of UHPC is observed at 7 days of maintenance,while the increase of that is slower at 28 days.The trends for the increase in tensile strength and elastic modulus of UHPC are consistent,reaching their peak at 7 days of maintenance,and stabilizing or slightly decreasing at 28 days of maintenance.The maintenance temperature is(70±2)℃,with a maintenance age of 7 days.
Keywords：UHPCstandard maintenancehigh temperature maintenancestrengthelastic modulus
Publication Date：2024-06-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 42-46,59 )