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Long-Term Behavior of Colloidal Nano-silica Reinforced Sand in Different Environments

Conference paper

Abstract

Colloidal nano-silica was firstly used for the injection of soil in the 1990s, which is relatively new compared with other materials. Nano-silica can be used into ground with low porosity. The aim is primarily to prevent or mitigate internal erosion. Since there are not any published data about the efficiency and the durability of nano-silica treated soil in different engineering environments, this paper focus on evaluating long-term improvement effect, including compressive strength and capacity to resist erosion. Nano-silica used in this paper is Levasil 300/30% hardened by NaCl of different concentration. Cylindrical specimens were prepared by mixing fine sand with nano-silica. The environments discussed in this paper include dry air, pure water, salt solution and acid solution. The test was carried out on specimens stored for 1, 7, 15, 30, 90, 180 and 365 days. The results show that, the colloidal nano-silica reinforced sand keeps stable in saturated environments (pure water, salt and acid) and becomes fragile in dry environment.

Keywords

Colloidal nano-silica Internal erosion Long-term behavior Compressive strength Capacity of resisting erosion 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Foshan UniversityFoshanChina
  2. 2.Université Bordeaux 1TalenceFrance

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