Next Article in Journal
Evaluation of Groundwater Sources, Flow Paths, and Residence Time of the Gran Desierto Pozos, Sonora, Mexico
Next Article in Special Issue
Desiccation Cracking Behavior of MICP-Treated Bentonite
Previous Article in Journal
Cyclogenesis and Density Currents in the Middle East and the Associated Dust Activity in September 2015
Previous Article in Special Issue
Chemo-Mechanical Interactions in the Ettringite Induced Expansion of Sulfate-Bearing Soils
Open AccessArticle

Experimental Study on the Influence of Polypropylene Fiber on the Swelling Pressure Expansion Attributes of Silica Fume Stabilized Clayey Soil

Discipline of Civil Engineering, Indian Institute of Technology, Indore 452020, India
*
Author to whom correspondence should be addressed.
Geosciences 2019, 9(9), 377; https://doi.org/10.3390/geosciences9090377
Received: 15 July 2019 / Revised: 7 August 2019 / Accepted: 26 August 2019 / Published: 29 August 2019
(This article belongs to the Special Issue Behavior of Expansive Soils and its Shrinkage Cracking)
Expansive soil shows dual swell–shrink which is not suitable for construction. Several mitigating techniques exist to counteract the problem promulgated by expansive clayey soils. This paper explored the potential mecho-chemical reinforcement of expansive clayey soil to mitigate the effect of upward swelling pressure and heave. The polypropylene fiber is randomly distributed in the soil for mechanical stabilization, and the industrial residual silica fume is used as a chemical stabilizer. The experimental analysis was made in three phases which involved tests on mechanically-reinforced expansive soil, using randomly distributed polypropylene fibers with different percentages (0.25%, 0.50%, and 1.00%), and which were 12 mm length. The second phase of experiments was carried out on chemical stabilized expansive soil with different percentages (2%, 4%, and 8%) of silica, and the next phase of the experiment focused on the combination of mecho-chemical stabilization of the expansive soil with different combinations of silica (i.e., 2%, 4%, and 8%) and polypropylene fibers (i.e., 0.25%, 0.50%, and 1.00%). Maximum dry density (MDD), optimum moisture content (OMC), liquid limit (LL), plastic limit (PL), plastic index (PI), grain size, and constant volume swelling pressure tests were performed on unreinforced and reinforced expansive soil, to investigate the effects of polypropylene fiber and silica fume on the engineering properties of expansive clayey soil. The experimental results illustrate that the inclusion of polypropylene fiber has a significant effect on the upward swelling pressure and expansion property of expansive soil. The reduction in the upward swelling pressure and expansion is a function of fiber content. These results also indicated that the use of silica fume caused a reduction in upward swelling potential, and its effect was considerably more than the influence of fiber. View Full-Text
Keywords: expansive soil; polypropylene fiber; silica fume; swelling pressure; expansion expansive soil; polypropylene fiber; silica fume; swelling pressure; expansion
Show Figures

Figure 1

MDPI and ACS Style

Tiwari, N.; Satyam, N. Experimental Study on the Influence of Polypropylene Fiber on the Swelling Pressure Expansion Attributes of Silica Fume Stabilized Clayey Soil. Geosciences 2019, 9, 377.

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

1
Search more from Scilit
 
Search
Back to TopTop