Assessment of coarse basalt aggregate in ultra-high performance concrete (UHPC)

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Abstract

In the present research, UHPCs applying coarse basalt aggregate are designed by using the particle packing theory and optimal mineral proportion. The mineralogical composition effect, basalt aggregate size effect and powder content effect were analyzed and discussed, based on
the workability and compressive strength of the designed UPHC. The results show that the optimal proportion of powder is 5% of micro-silica and 20% of limestone powder by the weight of powder. The coarse basalt aggregate has a rather limited influence on the mechanical strength of UHPC, and a slight decreasing trend is observed with the increase of
maximum size of basalt aggregate. The optimal powder content of UHPC is about 800 kg/m3 at the maximum size of basalt aggregate of 8 mm. The increase ratios of the compressive and tensile splitting strengths of UHPC with different powder amounts by 2% of steel fiber are
between 13% and 19%, 95%, and 110%, respectively.
Original languageEnglish
Title of host publicationProceedings of the 2nd International Conference on UHPC Materials and Structures UHPC 2018 - China
Place of PublicationChonging
PublisherRILEM Publications
Pages171-179
Number of pages9
Publication statusPublished - 7 Nov 2018
Event2nd International Conference on UHPC Materials and Structures - Fuzhou, China
Duration: 7 Nov 201810 Nov 2018

Conference

Conference2nd International Conference on UHPC Materials and Structures
CountryChina
CityFuzhou
Period7/11/1810/11/18

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