Practice and Research of Geosynthetic Reinforced Soil Walls in Australia - Reinforced Soil Engineering: Advances in Research and Practice - page 253

Figure 3 Connection strength of modular block facing.
4 RESEARCH AND DEVELOPMENT
Research and development activities of geosynthetic reinforced soil walls are
largely driven by the immediate needs of industry. Research projects are in the
form of special laboratory testing, calibration of design rules by nonlinear stress
analysis of innovative wall configurations, instrumentation and back analysis of
GRS walls. As such, some of the research works are reported under the “Case
History” section.
4.1 Pullout Resistance
4.1.1 Fly Ash as Select Fill
Fly ash is often considered as a waste material. However, it may be used in the
construction of GRS walls because the concern about its corrosive potential to
metallic soil reinforcement is no longer applicable. In order to study the
suitability of fly ash as the select fill, a series of large-scale pullout tests on a
range of geosynthetic reinforcements was reported in Hausmann and Clarke
(1994). Fly ash from the Vales Point Power Station, which had a grading varying