THE LOAD-STRAIN-TIME BEHAVIOUR OF TENSAR GEOGRID. POLYMER GRID REINFORCEMENT: PROCEEDINGS OF A CONFERENCE SPONSORED BY THE SCIENCE AND ENGINEERING RESEARCH COUNCIL AND NETLON LTD AND HELD IN LONDON 22-23 MARCH 1984

Abstract

Tensar geogrids are a new generation of soil reinforcing materials manufactured by heat stretching a perforated sheet of co-polymer to form a grid-like structure. In order to use them to their maximum efficiency it is necessary to establish the loads which they may carry for any period up to 120 years, the design lifetime of many civil engineering structures. In this paper the basic definitions that should be used to describe the geometry of the grids are given and then employed to identify the representative sizes and shapes of test specimens. Test methods which have been developed for quality control purposes and for performance data acquisition are detailed. Following this the methods of analysing and presenting data are given together with typical data for both uniaxial and biaxial grids. For the covering abstract of the symposium see IRRD 284425. (Author/TRRL)