Flocculation Test of Waste Mud during Foundation Pile Construction
In order to improve the dehydration effect of the waste mud of the foundation piles,taking the con-struction of foundation piles of the 8 sections in front of Xiongshang High-speed Railway Station as the re-search object,this paper expounds the influence of the type and amount of flocculants on the flocculation process by adding flocculant to the waste mud,conducting beaker flocculation test,vacuum extraction test,scanning electron microscope test.The results show that the use of cationic polyacrylamide(CPAM),non-ion-ic polyacrylamide(NPAM),and their combination with polyaluminum chloride(PAC)can promote the forma-tion of large blocks,low water content of filter cake,small proportion of intergranular pores,and strong dehy-dration ability.Four of the more effective flocculant solutions are:0.3%CPAM(dosage of 5%)or 0.3%NPAM(dosage of 4%),and a combination of the two polyacrylamide and 5%PAC(dosage of 3%).The a-bove types and combinations of flocculant can be used in the dehydration treatment application of waste mud in foundation pile construction to promote its resource utilization and environmental protection.
MudDehydration efficiencyFlocculantWater content of filter cakeScanning electron microscope imageFoundation pileFlocculation test
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