European Academic Research ISSN 2286-4822
ISSN-L 2286-4822
Impact Factor: 3.4546 (UIF)
DRJI Value : 5.9 (B+)
Article Details :
Article Name :
The role of gypsum addition to the soil on the relation of wet bulk density with shearing strength and penetration resistance
Author Name :
Husamuldeen A. Tawfeeq, Mustafa Z. Abd Alhameed, Abdulwahab A.R. Al-Kayssi
Publisher :
Bridge Center
Article URL :
Abstract :
A laboratory experiment was conducted to test the role of gypsum addition rates on the relation between soil wet bulk density with shearing strength and penetration resistance. Soil samples with S0(0), S1(100), S2(200), S3(300), S4(400) and S5(500) g gypsum kg-1 soil were prepared by mixing materials from surface soil (non gypsifesous) layer with pure with different gypsum content were samples were wetted at 50% of field capacity water contents 11.69 , 10.86, 10.39, 8.44 and 8.20% for soil samples S0, S1, S2, S3, S4 and S5 respectively. Soil samples were incubated for 60 days in plastic bags with continual daily mixing. After the incubation period, Soil samples were air dried, grinded and sieved through 2mm sieve. Soil sample were packed into a standard rings to a bulk density of 1.25 Mg m-3. Wet. Shear strength and soil penetration resistance were determined at o, 33, 100, 300, 500 and 1000 kpa. Results shows that both soil shear strength and penetration resistance were increased with increasing soil moisture tension. On the other hand wet soil bulk density was decreased by increasing moisture tension.
Keywords :
Gypsum content, Shear strength, penetration resistance

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