| In this dissertation,the engineering properties of the nano-Al2O3 and nano-TiO2 reinforced cement-stabilized soil are respectively studied through the laboratory experiments. Based on testing data,the unconfined compressive strength (UCS) of nanometerial-Al2O3 reinforced cement-stabilized soil (NARCSS) is firstly analyzed in different nanomaterial mixing ratio,cement mixing ratio,curing-period,water content,w/c ratio,etc.,and then the stress-strain relationship of NARCSS is given. The variation of the UCS of nanometerial-TiO2 reinforced cement-stabilized soil (NTRCSS) is also given in different nanometerial mixing ratio and curing period. According to the results of other researchers,the strength of cement-stabilized soil reinforced with different nanometerial are compared.The studies shows that the UCS of NARCSS increases with the increase of curing period,increases firstly and then falls with nano-Al2O3 mixing ratio,and increases with cement mixing ratio. According to the influencing degree,the main factors can be rated as following:cement mixing ratio,water content,nano-Al2O3 mixing ratio,the w/c ratio. The stress-strain relationship of NARCSS can be regressed by parabola.The UCS of NTRCSS doesn't vary greatly with increase of nano-TiO2 mixing ratio and curing period,but compared with that of general cement-stabilized soil,the UCS of NTRCSS at different curing-period decreases greatly.The addition of nano-SiO2-x can remarkably strengthen cement-stabilized soil,and nano-Al2O3 can increase the UCS of cement-stabilized soil. However,nano-TiO2 has bad effect on the UCS. Therefore,all nanomaterials can't be used as additive of cement-stabilized soil. |
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