Influence of Foam Addition on Properties of Silt-based Non-sintered Ceramsite
In this paper,an innovative process was adopted that the dredging sludge was used as the primary raw material,air foams were brought in to produce non-sintered ceramsite,and the influence of air foam addition on the porosity of the ceramsite as well as the influence of porosity on the ceramsite properties were explored.The results indicated that under conditions of water-cement ratio of 0.35,soil-cement ratio of 3,and curing time of 7 days,the porosity of the ceramsite increased from 14.90％to 32.23％with the increase of air foam,the density decreased from 1,144.32 kg/m3 to 792.68 kg/m3,the strength reduced significantly from 8.96 MPa to 4.68 MPa,and the 1-hour water absorption rate decreased from 17.74％to14.56％.The prepared ceramsite were the common ceramsite with a density class of 700.The air foam was consumed by 81.49％during the preparation of ceramsite.The ceramsite density was linearly related to the total porosity,the strength exhibited an exponential relationship with the porosity,and the 1-hour water absorption rate was linearly correlated with the open porosity.The increase of air foam primarily elevated the closed porosity of the ceramsite,thereby increasing the total porosity.The internal pores of the ceramsite were mainly concentrated in the range of 0-200 pm,and the larger the porosity of the ceramsite,the higher the proportionof larger pore size within its internal structure.
Non-sintered ceramsitedredged sludgeair foamporosityreuse of resource
万方数据
维普
