Research on the Mechanical Properties of Modified Red Clay Based on Orthogonal Test
In order to improve the mechanical properties and water stability of red clay,this paper mixed metakaolin,fly ash and blast furnace slag as curing agent to improve red clay.Based on the orthogonal test,the unconfined compressive strength test is conducted on modified red clay with different contents of metakaolin,fly ash and blast furnace slag to determine the optimal combination ratio of metakaolin,fly ash and blast furnace slag.Subsequently,the unconfined compressive test is conducted on modified red clay with different contents under the optimal combination ratio of metakaolin,fly ash and blast furnace slag.The results show that the influence degree of metakaolin,fly ash and blast furnace slag on the unconfined compressive strength of modified red clay is in the following order:fly ash>metakaolin>blast furnace slag.The optimum ratio is 15%for metakaolin,8%for fly ash and 6%for blast furnace slag.The unconfined compressive strength of the modified red clay shows a significant peak change with the increase of the curing agent content,and reaches the maximum at 14%content,and its strength gradually increases with the increase of curing time.
red claymetakaolinfly ashblast furnace slagorthogonal test
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