Next Article in Journal
Effects of Cutting Edge Microgeometry on Residual Stress in Orthogonal Cutting of Inconel 718 by FEM
Previous Article in Journal
Modified Polymeric Nanoparticles Exert In Vitro Antimicrobial Activity Against Oral Bacteria
Open AccessArticle

Stabilization of Loess Using Nano-SiO2

MOE Key Laboratory of Mechanics on Disaster and Environment in Western China, Department of Geological Engineering, Lanzhou University, Lanzhou 730000, China
Research Center on Landslides, Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
Department of Geological Engineering, Chang’an University, Xi’an 710054, China
Authors to whom correspondence should be addressed.
Materials 2018, 11(6), 1014;
Received: 20 May 2018 / Revised: 10 June 2018 / Accepted: 13 June 2018 / Published: 14 June 2018
Improving the performance of loess is of significant importance for lowering its collapsibility and water sensitivity to construction requirements and for geohazard mitigation. The present paper studies the changes in mechanical, structural, and mineralogical properties of nano-SiO2-treated loess with different contents and curing days. The mechanical behavior was examined by unconfined compressive strength (UCS) of untreated and treated loess. To better understand the mechanisms of stabilization, particle size distributions, scanning electron microscope (SEM) images, and X-ray diffraction (XRD) analyses were carried out. The results show that the UCS increase with increasing contents and curing days due to nano-SiO2 addition produced coarser particles, denser packing, and smaller pores in treated loess. The changes in the properties can be attributed to the formation of aggregation and agglomeration, with greater particle sizes and more interparticle contact. In addition, the results from mineralogical component analysis further confirm that physical structure modification controls the changes in mechanical and fabric properties, rather than chemical component alteration. Even small nano-SiO2 additions can also provide great improvement when curing days are enough for the treated loess. These findings reveal that nano-SiO2 has the potential to serve as a cost-effective stabilized additive that treats the universal loess. View Full-Text
Keywords: loess; nano-SiO2; strength enhancement; structure modification loess; nano-SiO2; strength enhancement; structure modification
Show Figures

Graphical abstract

MDPI and ACS Style

Kong, R.; Zhang, F.; Wang, G.; Peng, J. Stabilization of Loess Using Nano-SiO2. Materials 2018, 11, 1014.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop