Study on the road performance of microbial synergistic enhancement of roadbed waste soil
KONG Deyu
ZHANG Kaikai
NIE Haibo
NI Tongyuan
ZHENG Zhongbo
CHEN Leye
ZHANG Tianxiang
Abstract：Using fine aggregate filling,microbial mineralizers,and cement(fly ash)to synergistically strengthen roadbed spoil,and conducting experimental research on the influence of microbial mineralizers on the road performance of synergistically strength-ened roadbed spoil under different cement and fly ash dosages.The results showed that the addition of microbial mineralizers can increase the maximum dry density and decrease the optimal moisture content of roadbed spoil reinforced with cement+fly ash.The unconfined compressive strength increased by 24.35%～27.50%at 7 days,19.28%～20.99%at 28 days,and the water stability coeffi-cient increased by 0.1.When the cement content is 3%and the fly ash content is 3%,the 7-day unconfined compressive strength of the roadbed spoil reinforced by microbial mineralizer+cement+fly ash can reach 1.8 MPa,which meets the minimum strength re-quirements for the subgrade layer of second grade and below highways.
Keywords：microbial mineralizercollaborative reinforcementroadbed spoilwater stability coefficient
Publication Date：2025-03-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )