Confined-Accelerated Creep Tests to Determine the Creep Reduction Factor

Abstract

The creep characteristics of geogrids is one of the most important factors affecting its permanent in reinforced soil structures. currently, most of the creep tests are under unconfined conditions, the results deviates significantly from the real status in the application . And conventional creep tests are time-consuming and costing.In this paper, time-temperature superposition principle of geosynthetics is used to accelerate creep and shorten test time. This paper presents a new device to perform simultaneously confined and accelerated creep tests on HDPE50 geogrid . According to the results and time-temperature superposition principle of geosynthetics,the master curves are obtained . Finally the creep reduction factor of confined and unconfined conditions is analysed in the actual project .

Use of Recycled Construction and Demolition Waste (RCDW) in Geosynthetic-Reinforced Roadways: Influence of Saturation Condition on Geogrid Mechanical Properties

“…The reduction factor for installation damage (RF ID ) has been widely investigated using in-field tests performed with natural aggregates [19][20][21][22][23][24] and recycled aggregates [25][26][27][28][29]. In the same way, the reduction factor for creep (RF CR ) has been reported under in-isolated conditions [30][31][32][33][34] and in-confined conditions [35][36][37][38][39][40]. Furthermore, load calibrations and resistance factors from a reliability-based approach have been proposed for a large amount of RF ID [41,42] and RF CR [43] data.…”