Microstructure of muddy soil treated by&nbsp;high temperature sintering

WANG Yi-qing; YI Nan-gai; CUI Chun-yi; HAO Xian-hao; ZHANG Dong

doi:10.16411/j.cnki.issn1006-7736.2019.02.014

Journal of Dalian Maritime University >

2019 , Vol. 45 >Issue 2: 101 - 107

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2019.02.014

Microstructure of muddy soil treated by high temperature sintering

WANG Yi-qing ,
YI Nan-gai ,
CUI Chun-yi ,
HAO Xian-hao ,
ZHANG Dong

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（Transportation Engineering College,Dalian Maritime University, Dalian 116026, China）

Received date: 2018-10-26

Revised date: 2018-12-24

Online published: 2018-12-24

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Abstract

In order to determine the microcosmic mechanism of compressive strength change of muddy soil treated by high temperature sintering, the microstructure and chemical composition of muddy soil before and after sintering were studied by using SEM and XRD. Results show that the composition and structure elements of muddy soil are adjusted in the high temperature sintering process, which result in irreversibly change of chemical composition and microstructure of soil with the increase of heating temperature. After high temperature sintering, the mineral composition of muddy soil changes accompanied by the appearance of mixed crystals and ternary eutectic compounds, which changes the contact state, particle size and bonding form of soil particles. When the sintering temperature reaches above 700℃, the soil particles form a large volume of soil skeleton under the cementation of eutectic compounds, and the microstructure changes from honeycomb structure to block structure, and the integrity of soil structure improves, so as to enhances the compressive strength.

Key words： muddy soil; high temperature sintering; microstructure; scanning electron microscope(SEM)

Cite this article

WANG Yi-qing , YI Nan-gai , CUI Chun-yi , HAO Xian-hao , ZHANG Dong . Microstructure of muddy soil treated by high temperature sintering[J]. Journal of Dalian Maritime University, 2019 , 45(2) : 101 -107 . DOI: 10.16411/j.cnki.issn1006-7736.2019.02.014

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