Experimental Investigation on the Behaviour of Glass Fibre-Reinforced Cohesive Soil for Application as Pavement Subgrade Material

Proctor compaction and California bearing ratio (CBR) tests were performed on glass fibre-reinforced cohesive soil to investigate its suitability as a subgrade material. The effects of varying fibre content, fibre length, compacted moisture content and soaking period on CBR and secant modulus were i...

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Bibliographic Details
Published in:International journal of geosynthetics and ground engineering 2017-06, Vol.3 (2), p.1-12, Article 13
Main Authors: Patel, Suchit Kumar, Singh, Baleshwar
Format: Article
Language:English
Subjects:
Building Materials
California bearing ratio
Engineering
Environmental Science and Engineering
Fiber reinforced materials
Fiber reinforcement
Foundations
Geoengineering
Glass fiber reinforced plastics
Glass fibers
Hydraulics
Moisture content
Original Paper
Pavements
Penetration depth
Penetration tests
Reinforced soils
Reinforcement
Soil compaction
Soil investigations
Soil moisture
Subgrades
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Summary:Proctor compaction and California bearing ratio (CBR) tests were performed on glass fibre-reinforced cohesive soil to investigate its suitability as a subgrade material. The effects of varying fibre content, fibre length, compacted moisture content and soaking period on CBR and secant modulus were investigated. The test results indicate marginal variation of MDU and OMC with glass fibre reinforcement. Unsoaked CBR test was conducted on specimens compacted at optimum moisture content (OMC) and at 2% wet and dry sides of OMC, whereas soaked CBR test was conducted only on specimens compacted at OMC. CBR value increases with penetration depth up to 5.08 and 7.62 mm under unsoaked and soaked conditions, respectively. Both CBR and secant modulus increase with fiber content and fiber length at any compacted state. They decrease on either side of OMC, and also with increasing soaking period. The reinforcement benefit increases with increasing fiber content up to 0.75% for any fiber length and testing condition. The maximum enhancement in CBR are 2.77 and 2.85 times with 0.75% fibre reinforcement of 20 mm length, under unsoaked and soaked conditions, respectively. Using the glass fibre-reinforced soil in the subgrade may cause reduction of pavement thickness up to 25% even for a traffic value of 150 msa.
ISSN:2199-9260
2199-9279
DOI:10.1007/s40891-017-0090-x