doi:10.16186/j.cnki.1673-9787.2020.5.23

Received:2019-12-06 00:00:00

Revised:2020/02/21

Published:2020/09/15

Study on mechanical properties of peat soil improved by cement andhigh calcium fly ash

ZHANG Wenhao1, XIE Jianbin1,2, LIU Daoyan3, WANG Sheng1

1.School of Architecture and Urban Planning， Yunnan University， Kunming  650500 ， Yunnan， China;2.Kunming Junlong Rock Engineering Co.， Ltd. ， Kunming  650021 ， Yunnan， China;3.China Railway Tunnel Group Co. ， Ltd. ，Sanhe  065200 ，Hebei， China

Abstract:The feasibility and improvement effect of cement and high-calcium fly ash as additives on peaty soil improvement in Dianchi area of Kunming in Yunnan Province were studied， and compaction test， permeability test， standard consolidation test， direct shear test and unconfined compression test of modified soil mixed with modified soil material（ cement fly ash， cement high calcium fly ash ） were adopted. By comparing and analyzing the test results of mechanical properties of peat soil and modified soil， the best improvement scheme was summarized. The results showed that single admixture cement， fly ash， high calcium fly ash， mixed cement fly ash and cement high calcium fly ash had certain improvement effect on the mechanical properties of peat soil. The improvement effect of mixed cement fly ash and cement high calcium fly ash on peat soil was better than that of single modified material， and when 6% cement 12% high calcium fly ash was added into peat soil， the improvement effect was the most remarkable.

Key words:cement;high calcium fly ash;Dianchi area，Yunnan Province;peaty soil;mechanical property

水泥_高钙粉煤灰改良泥炭质土力学性能研究_张文豪.pdf