| Autor: |
Chandra Bogireddy, Rakesh Kumar, Vinod Kumar Adigopula |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Lecture Notes in Civil Engineering ISBN: 9789813343238 |
| DOI: |
10.1007/978-981-33-4324-5_8 |
| Popis: |
Most of the road construction projects in developing countries like India are still adopting density base quality control approach. Density base method is time-consuming and material properties like stiffness or moduli could not monitor through conventional density base method. In situ stiffness measuring device triggers to use lightweight deflectometer (LWD) method to evaluate the compaction characteristics of the unbound layer. In this study, one experimental stretch was constructed in the state of Gujarat to reveal the feasibility of application of LWD in the Indian context. The experimental stretch was low volume road and compaction process was monitored on subgrade, base and surface layers. Total of 138 test points were performed on considered layers. In situ fixing of stiffness value the methodology was elaborated and target stiffness values were determined for unbound layers. LWD target stiffness value of subgrade and subbase was found to be 30 and 47 MPa respectively. LWD can be used as in situ stiffness measuring device during the construction of low volume roads and conclusion was made based upon the coefficient of variance (COV). COV of all the layers were found to be in the range of 1.03% to 17.48% respectively. Frequency of LWD test locations can be increased and it will improve the overall quality of compacted layers. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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