Evaluating the effect of active ions on the early performance of soft clay solidified by modified biomass waste-rice husk ash     

Chen  Ruifeng  Congress  Surya Sarat Chandra  Cai  Guojun  Zhou  Ruixian  Xu  Jingmin  Duan  Wei  Liu  Songyu 《Acta Geotechnica》2023,18(2):1039-1056

Acta Geotechnica - Soft clay generally cannot be directly used as subgrade material due to its poor engineering characteristics. The application of rice husk ash (RHA) for the solidification of...  相似文献   

Performance evaluation of soil mixtures treated with graphite and used as barrier fill material for high-level radioactive waste repository     

Liu  Xiaoyan  Congress  Surya Sarat Chandra  Cai  Guojun  Liu  Songyu 《Acta Geotechnica》2021,16(5):1487-1507

Buffer/backfill material is an important engineering barrier in a deep geological repository of high-level radioactive waste (HLW). Its thermo-hydro-mechanical (THM) performance is very important for the safe and stable operation of the HLW repository system. Natural graphite powder mixed with sodium bentonite forms a buffer/backfill material that can dissipate heat quickly and provide strong isolation. In this paper, the THM characteristics of bentonite–sand–graphite–polypropylene fiber (BSGF) mixtures, used as a buffer/backfill material, were studied through a series of laboratory tests. The influence of graphite and polypropylene fiber contents on thermal conductivity, swelling pressure, hydraulic conductivity, and strength properties of BSGF mixtures with different sand contents was analyzed. Experimental results indicated that the graphite content, the maximum graphite mesh number, and the initial dry density of bentonite–graphite mixtures influenced the thermal conductivity of bentonite–graphite mixtures. The addition of polypropylene fiber was found to enhance the shear strength and inhibit cracking without significantly affecting the expansivity, permeability, and thermal conductivity of the BSGF mixtures. This study provides a new buffer/backfill material that can improve the stability, functionality, and thermal efficiency of the HLW repository.

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Prediction of in situ state parameter of sandy deposits from CPT measurements using optimized GMDH-type neural networks     

Duan  Wei  Congress  Surya Sarat Chandra  Cai  Guojun  Zhao  Zening  Liu  Songyu  Dong  Xiaoqiang  Chen  Ruifeng  Qiao  Huanhuan 《Acta Geotechnica》2022,17(10):4515-4535

Acta Geotechnica - Increase in seismic events around the world has necessitated the evaluation of soil liquefaction potential since it adversely influences the stability of adjacent structures and...  相似文献