Experimental Study of the Injectability and Effectiveness of Laponite Mixtures as Liquefaction Mitigation Technique

• DOI: 10.1061/9780784481486.028
• Publication Date: 2018-06-07T10:04:43Z
• Authors: Lucia Mele; Alessandro Flora; Stefania Lirer; Anna d’Onofrio; Emilio Bilotta
• Keywords: Soil liquefaction

The recent earthquakes that hit Italy have shown the built heritage is at risk not only because of inertial and kinematic stresses directly induced on structure by shaking, but also possible soil liquefaction phenomena. techniques generally used to mitigate susceptibility in case new constructions (vibro-compaction, dynamic compaction, etc.), are suitable for existing buildings. Within a large European project (LIQUEFACT), University Napoli studying innovative improvement mitigation densely urbanized areas. In this paper, addition fine content (laponite) experimentally studied means different preliminary laboratory tests with main goal verify injectability effectiveness selected mixtures against liquefaction. applicability technique has been verified viscosity permeability tests, while its analyzed via cyclic triaxial tests. Experimental results show an additive (SPP) delay mixture gelling time necessary assure tested laponite mixtures. reduces mobility grains modifies pore pressure building up during cycling loads, leading increase resistance.