Effect of Multi-nanomaterials on the Corrosion Resistance of Coastal Cement Soil
Foundations of cement soil have many engineering problems such as limited strength improve-ment,large late deformation,and susceptibility to mechanical property deterioration under the corrosive effect of seawater.In this paper,single,binary and ternary combinations of three nanomaterials,such as Nano-SiO2(NS),Nano-CaCO3(NCa)and Nano-Clay(NC),were incorporated into ordinary cement soil,and then the specimens corroded by seawater for a long time were tested for unilateral compressive strength to investigate the effects of the type of nanomaterials,material incorporation combination and in-corporation amount on the compressive strength of cement soil in long term corrosive environment of sea-water.The effect of the type,combination and amount of nanomaterials on the compressive strength of the soil in the long term seawater corrosion environment was investigated.The test results showed that the effect of Nano-SiO2 on the unconfined compressive strength of cement soil in seawater corrosive environ-ment was the most obvious and most effective with single addition,followed by Nano-CaCO3 and the worst with Nano-Clay.When multiply added,except for NS+NCa,a binary combination,all other binary and ternary nano-combinations have lower compressive strength of cement soil in seawater corrosive environ-ment than the case of single addition of nanomaterials due to the interaction between materials.The devel-opment of compressive strength of binary nano-combination NS+NCa on long-term seawater corrosive en-vironment cement soil is better than single addition,when the doping amount of upper NS+NCa is 20％o,it can improve the compressive strength of cement soil in long-term seawater corrosive environment by 15％on top of single addition,which can significantly improve the compressive strength of cement soil in long term seawater corrosive environment.
万方数据
维普
