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Effect of Calcium Chloride on Highway Subgrade Soil Containing High Soluble Salts | ||
| Journal of Engineering and Sustainable Development | ||
| Article 1, Volume 19, Issue 3, 2015, Pages 34-49 | ||
| Authors | ||
| Assist. Prof; Dr. Saad Farhan Ibrahim; Assist. Prof; Dr. Abdulhaq Hadi A. Ali; Mohammed Salah Ibrahim | ||
| Abstract | ||
| The quality of the subgrade will greatly influence the pavement design and the service life of the pavement. This study is performed to evaluate the effect of Calcium Chloride (〖CaCl〗_2) on the strength of subgrade soil containing high percentage of soluble salts. The soil sample brought from Al-mahmodia city south of Baghdad, it contains about (15.685%) of soluble salts by weight of soil content. California Bearing Ratio (CBR) value is determined for the natural soil and Calcium Chloride (〖CaCl〗_2) with different number of blow per layer (10, 25 and 56) for (4-days) soaking periods to achive CBR value at 95% relative modified proctor. Durability tests (effect of long term soaking and drying) for the subgade stabilized with 〖(2.5% CaCl〗_2) and compacted at 95% relative modified proctor is determined, the soaking periods are (4, 7, 14, 28, 60 days), the results of soaking periods are ( 7.961, 6.446, 4.436, 3.398, 2.427) respectively and the results of soaking and drying periods are ( 8.258, 6.531, 4.563, 3.511, 2.621). The results of soaking and drying show reduction in both (CBR) value and (T.S.S) with the time. | ||
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