Evaluation of the Laboratory Degradation Performance of a Straw Drainage Board

Runtian Zhu, Yinqiang Su, Cankun Wu, Wei Yuan and Yongfeng Deng ()
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Runtian Zhu: Key Laboratory for Transport Industry of Bridge Detection Reinforcement Technology, Chang’an University, Xi’an 710064, China
Yinqiang Su: Zhuhai Communication Group, Zhuhai 519000, China
Cankun Wu: Zhuhai Communication Group, Zhuhai 519000, China
Wei Yuan: Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 211189, China
Yongfeng Deng: Institute of Geotechnical Engineering, School of Transportation, Southeast University, Nanjing 211189, China

Sustainability, 2022, vol. 14, issue 24, 1-14

Abstract: Plastic drainage boards are installed into the foundation as vertical drainage channels in vacuum preloading projects. After construction, numerous plastic drainage boards are left in the foundation, causing not only white pollution but also potential groundwater contamination. Straw was utilized to produce degradable drainage boards in this study, and the feasibility of straw drainage boards was confirmed by laboratory degradation tests. The results revealed that Zhuhai’s soft marine soil is rich in degrading bacteria such as Bacteroidota and Firmicutes , which have adverse effects on the performance of the straw drainage board. The straw drainage board was deteriorated by bacteria in the foundation, and the discharge capacity and tensile strength dropped with time, with the discharge capacity degradation relationship as q w ( t ) = q w 0 (1 − 3.83 × 10 −6 t 2 ). The discharge capacity and tensile strength of straw drainage boards are lower than those of plastic drainage boards, but they all meet the engineering requirements. Straw drainage boards can replace plastic drainage boards in vacuum preloading reinforcement projects, which not only solves the problem of environmental pollution but also expands the comprehensive utilization of straw resources in a new way.

Keywords: vacuum surcharge preloading; degradable drainage board; straw utilization; consolidation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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