Study on the preparation of unburned brick based on Chaohu dredged sediment and its optimum process parameters
ZHANG Qiong
HAN Jiuchun
GU Yonggen
ZHANG Yuming
ZHANG Haotian
ZHAN Binggen
Abstract：Based on the dredging sediment of Chaohu Lake,the effects of solidification material types and dosages,forming pressure and loading rate,and curing methods on the compressive strength of the sediment consolidated body were studied.Non fired bricks for dredging sediment were prepared based on the optimal mix ratio and process parameters.The results show that the optimal mix ratio of dredging sediment solidification materials is 62.0%for dredging sediment,12.5%for cement,2.5%for quick-lime,2.5%for fly ash,7.5%for mineral powder,12.2%for water,and 0.8%for water glass;The optimal molding process parameters are:molding pressure of 15 MPa,loading rate of 0.4 mm/s,using 70℃steam curing,the water absorption rate of the prepared dredged sediment unburned brick is 13.2%,the average compressive strength after 7 days is 18.5 MPa,the minimum compressive strength of a single brick is 16.3 MPa,the average compressive strength after freeze-thaw is 17.1 MPa,and the dry mass loss rate of a single brick is≤1.6%,which meets the requirements of MU15 for compressive strength,water absorption rate,and frost resistance.
Keywords：curing materialsconsolidated bodydredging sedimentunburned brickcompressive strength
Publication Date：2023-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 69-73 )