Effect of Dispersed Reinforcement on Ultrasonic Pulse Velocity in Stabilized Soil.

Maciej Miturski,Rytis Skominas,Mateusz Stelmaszczyk,Wojciech Sas,Andrzej Głuchowski,Raimondas Šadzevičius,Algirdas Radzevičius

doi:10.3390/ma14226951

Abstract

One of the fundamental techniques for road subgrades is soil stabilization. Considering the high emission of carbon dioxide during the production of binders, novel techniques to reduce the binder are being studied. Thus, we investigated dispersed reinforcement in stabilized soils. A study was conducted to determine the ultrasonic pulse velocity in nine mixtures of soil, cement, and polypropylene fibers and then correlate the results with other destructive tests. The results show a decrease in wave velocity in mixes with fiber addition by up to 18.5%. The result is dependent on the curing time and whether the samples were stored in a water tank. Immersion in water increases the obtained results by about 6.3%. Based on the analysis, for mixtures with fibers, boundary velocities of waves above which lower values of modulus of elasticity were obtained were determined. Depending on the mix and the module analyzed, the limits range from 2194 m/s to 2498 m/s.

Highlights

The technique of stabilizing soil for road purposes was already used over 2000 years ago to construct Roman roads [1]
Sectionreinforcement presents the in the form of polypropylene fiberspulse changes the structure of suchWave a composite, which results obtained from the ultrasonic velocity measurements
Non-linear analysis was performed to determine the relationship between ultrasonic pulse velocity (UPV) and unconfined compressive strength (UCS)

Summary

Introduction

The technique of stabilizing soil for road purposes was already used over 2000 years ago to construct Roman roads [1]. The idea of soil improvement by stabilization is to mix the soft soil with an additive [2], as a result of which its applicability in geotechnical projects will be increased. Of all the stabilizing products available, cement is the most commonly used to improve the mechanical properties of soil [4,5,6,7]. There is a continuous increase in the demand for binders such as cement, which is one of the primary materials for stabilizing soil. This has led to a 30-fold increase in cement production since 1950 and an almost four-fold increase since 1990 [10]

Methods

Results

Conclusion