Freeze–Thaw Durability of Cement-Stabilized Soil Reinforced with Polypropylene/Basalt Fibers
- 1 September 2021
- journal article
- research article
- Published by American Society of Civil Engineers (ASCE) in Journal of Materials in Civil Engineering
- Vol. 33 (9), 04021232
- https://doi.org/10.1061/(asce)mt.1943-5533.0003905
Abstract
Many studies have been carried out on the influence of freeze–thaw cycles on the mechanical behavior of cement- or lime-stabilized soils. However, very limited studies have considered the effects of freeze–thaw cycles on cement-stabilized soil reinforced with fibers. The main objective of this study is to determine the effects of polypropylene fiber (PPF) and basalt fiber (BF) content (0%, 0.5%, 1%, 2%, and 5%), cement content (0%, 3%, and 9%), number of freeze–thaw cycles (0, 2, 4, 8, and 10), and initial moisture content on the unconfined compressive strength (UCS) of clay soil. The study reveals that adding cement, PPF, or BF to soil causes a remarkable increase in strength, where the strength of the PPF-reinforced specimens is significantly more than that of BF-reinforced ones. The UCS values of the specimens compacted at optimum moisture content (OMC) are almost more than those that were prepared at a molding moisture content of 0.8 OMC or 1.2 OMC. The strength of specimens increases with increases in cement content and curing time. However, the axial strain at failure for cement-stabilized specimens decreased with increasing cement content or curing time. Furthermore, it is concluded that the increase in the UCS of combined PPF or BF with cement inclusion is more than that caused by each fiber without cement. A regression model is developed to predict the UCS in terms of four effective agents for each case of stabilization by BF or PPF. Results indicate a satisfactory performance of the model where the Pearson correlation coefficient above 0.95 for UCS prediction is obtained.Keywords
This publication has 59 references indexed in Scilit:
- A simple review of soil reinforcement by using natural and synthetic fibersConstruction and Building Materials, 2011
- Environmental effects on durability of soil stabilized with recycled gypsumCold Regions Science and Technology, 2011
- The mechanics of fibre-reinforced sandGéotechnique, 2010
- Static liquefaction of fibre reinforced sand under monotonic loadingGeotextiles and Geomembranes, 2010
- Effect of depositional method on the microstructure of silty sandCanadian Geotechnical Journal, 2008
- Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soilGeotextiles and Geomembranes, 2007
- Behavior of a Fiber-Reinforced Bentonite at Large Shear DisplacementsJournal of Geotechnical and Geoenvironmental Engineering, 2006
- A review of the influence of freeze-thaw cycles on soil geotechnical propertiesPermafrost and Periglacial Processes, 2006
- Physical processes during freeze-thaw cycles in clayey siltsCold Regions Science and Technology, 1989
- Preparing Test Specimens Using UndercompactionGeotechnical Testing Journal, 1978