Original Experimental Campaign of Indentation Instrumented on Aggregates of Non-Hazardous Waste Incineration Bottom Ash to Study the Heterogeneity of their Rigidity

Abstract

An extensive experimental work of instrumented indentation on isolated particles of Non-Hazardous Waste Incineration bottom ash (NHWI) is presented in this paper. The aggregates studied come from the Garenne quarries at Vignoc (Brittany, France). Two spherical tungsten carbide indenters of respective 0.5 and 140 mm radius “R” were used for test series “A” and “B”. The particles studied have diameters ranging between 20 and 25 mm. With a 0.5 mm radius indenter, average reduced elastic moduli ranging from 15 to 68 GPa were found. An average reduced elastic modulus of 15 GPa was found with the 140 mm radius indenter. The experiments made it possible to highlight the particular heterogeneity that characterizes the rigidity of the types of aggregates studied.

Mechanical Behaviour of Cement-Bound Gravels by Experiment-Based 3D Multi-Scale Modelling: Application to Non-Hazardous Waste Incineration Bottom Ashes Aggregates for Use in Road Engineering

“…The 0.5 mm radius indenter has made it possible to test the solid phases separately while the 140 mm radius indenter has been used to test an extensive zone integrating different solid phases and the porosity. The original experimental campaign of indentation instrumented on aggregates of NHWI bottom ash is presented in detail in [30,[33][34][35][36]. The "Oliver and Pharr" method [2] has been used to determine the mean elastic reduced modulus.…”

Study of the Behaviour of Senegalese Ballast Materials during Compaction with the C-Mould: Case of Bandia Limestone and Diack Basalt

“…Ballast, a bed of crushed stones that directly receives the armament of the track, plays an essential role in the good performance and durability of the track. Study of the mechanical behaviour of materials used in public works in general has been of interest to the scientific community for a very long time [1][2][3][4][5][6]. The case of materials used as railway ballast is also a branch of public works that attracts a lot of interest.…”

Cartographie Géotechnique par Deep Learning Approche par Réseaux de Neurones Artificiels

“…Pour ce qui est des matériaux composant l'infrastructure elle-même, de nombreux travaux scientifiques ont été faits pour une maitrise plus ou moins parfaite de leur comportement mécanique. On en distingue deux : les granulats naturels issus de carrières d'extraction et les matériaux alternatifs tels que les mâchefers d'incinération de déchets non dangereux qui ont fait l'objet de publications récentes (Sow et al, 2017a(Sow et al, , 2017b(Sow et al, , 2018a(Sow et al, , 2018b(Sow et al, , 2018c(Sow et al, , 2018d(Sow et al, , 2018e, 2019a(Sow et al, , 2019b(Sow et al, , 2019c. Cependant, le comportement mécanique de l'infrastructure est en corrélation avec celui du ou des matériaux constituant le sol support.…”