Strength and Environmental Durability Analysis of MSWI Fly Ash-cement Co-stabilized Soft Clay Under Freeze-thaw and Dry-wet Cycles
The disposal of MSWI fly ash has become a hot spot of more and more concern in the society,and the current research is popular when realizing its resource utilization.Taking the municipal solid waste incineration fly ash from a landfill site in Guangxi as the main research object,the MSWI fly ash-cement-soft soil system was subjected to dry-wet and freeze-thaw cycles under standard curing conditions.The unconfined compressive strength test,flip oscillation test and acid neutralization test were used to explore the strength,environment and durability of fly ash cement soil.The results show that the samples with MSWI fly ash can meet the strength requirements of the secondary road base after maintenance.The mass loss of the samples under the three ratios is good,and the acid buffering capacity is strong.Through the horizontal oscillation toxicity test,the release toxicity of the target heavy metals Pb,Cu and Cd was explored,which was lower than the groundwater class IV water limit,and the environmental impact was small.Finally,the economic and social benefits of fly ash for road subgrade reinforcement were evaluated,which was considerable.
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万方数据
维普
