Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : soil stabilization

A Study on Stabilization of Base Course Material with Portland Cement

Jabar M. Rasul; Noori S. Ali

Engineering and Technology Journal, 2014, Volume 32, Issue 5, Pages 1129-1140

The base road material sources are distributed in many locations of Erbil Governorate. Generally most of them having sound engineering properties, so it dose not need to stabilized chemically. But recently in several constructed roads rutting phenomenon are appeared soon after construction and usage. For this reason in this study, materials in four quarries are taken and treated with Portland cement ( 0% to 7% contents). Engineering properties and unconfined compressive strength are studied. The results indicated that the unconfined compressive strength increased more than 10 times (from1069 kPa to 11238kP) for Kasnazan materials, about 3 times (from 1999 kPa to 5881 kPa) for crushed (Kalak) gravel, about 4 times (from 793 kPa to 3337 kPa) for Zurgazraw materials and more than 3 times (from 1744 kPa to 6640 kPa) for crushed (Darabezmara) stone. It was found that the optimum cement content to be equal to 2.9%, 0.6%, 4.8% and 0.6% of dry weight of Kasnazan, Kalak (crushed gravel), Zurgazraw, and Darabzmara (crushed stone) materials respectively.

Effect of Fibers on Some Engineering Properties of Cement and Lime Stabilized Soils

Suhail A. Khattab; Ibrahim M. Al-Kiki; Abderrahmane H. Al-Zubaydi

Engineering and Technology Journal, 2011, Volume 29, Issue 5, Pages 886-905

Recently, many attempts were made to use metal fiber reinforcements to
improve some soil properties. In this research, the effects of fibers on the
compaction and mechanical properties of cement and lime stabilized soils (silty
and clayey soils respectively) were studied. Variables such as stabilizer (cement
and lime) content, amount and type of metal fibers were studied. Results indicated
that the addition of fibers lead to increase in the maximum dry unit weight. On the
other hand, a maximum values of unconfined and tensile strength were obtained
with the addition of 0.5 % short fiber (FS) and 1.5 % long fiber (FL) respectively.
During the flexural test a brittle manner failure was observed for the unreinforced
samples and samples prepared with little amount of fibers 0.5%. Finally, the
addition of fibers increases the fracture energy of cement stabilized silty soil and
lime stabilized clayey soil.