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Treatment of Collapsible Soils with Granulated Blast Furnace Slag and Calcined Eggshell Waste

Adjabi Souhila, Nouaouria Mohamed Salah, Djebabla Wafa

Civil and Environmental Engineering Reports

2021

Vol. 31, no. 2

138--162

In order to meet environmental and socio-economic challenges, the recycling of waste tobe used in the treatment of geotechnical problems is one of the main ways of preserving the environment with a lower economic value. The objective of this experimental work is to improve the characteristics and to study the mechanical behaviour of collapsible soil treated with a new hydraulic stabilizer composed of Crushed Granulated Blast Furnace Slag (CGBS) active by Eggshell Waste (CES). The specimens were mixed with stabilizer content, varying from 0 to 15% in mass, with an initial water content of 4, 6 and 8% respectively. in mass. Oedometer apparatus was used to study the addition of new hydraulic stabilizer effect on the Collapse Potential. Triaxial tests are also conducted to determine the shear strength parameters (cohesion and internal friction angle) of this treated soil. The results of this research study show that the mechanical properties of the treated collapsible soil were significantly improved. An appreciable reduction in the collapse potential is observed. The addition of 15% of this new stabilizer with initial water content of 4% under a compaction of 60 blows/ layer is capable of increasing internal friction angle and cohesion. It can be concluded from this study that the mixture of granulated slag and calcined eggshell can be used as an effective treatment of collapsibility phenomenon at low cost while protecting the environment from industrial waste.

Wpływ energii zagęszczania na zagęszczenie gruntów i parametry zagęszczalności

Dąbska A., Pisarczyk S.

Inżynieria i Budownictwo

2011

R. 67, nr 1

21-23

Przedstawiono zależności wskażnika zagęszczenia różnych gruntów od energii zagęszczania. Podano zależności maksymalnych gęstości objętościowych szkieletu uzyskanych metodą zmodyfikowaną Proctora od maksymalnych gęstości objętościowych szkieletu gruntowego uzyskanych metodą standardową Proctora i od odpowiednich wilgotności optymalnych.

The dependence of compaction degree on energy compaction for different kinds of soils has been presented. There are also shown relationships between maximum dry density of solid particles obtain from modified Proctor method and maximum dry density of solid particles obtained in standard Proctor method and their optimum water contents.