Abstract
In this research, effect of freezing-thawing and temperature on aggregate stability created by portland cement in a crust-ing soil were investigated under the laboratory conditions. Soil sample in the pots were equilibrated at field capacity water content and left for incubation a hundred days. Aggregate stability of the soil aggregates 1 to 2 mm were determined at 25th and 100th days of incubation before and after the freezing-thawing. The aggregates were packed in plastic cores and equili-brated at field capacity water content subjected to 5 freezing-thawing cycles at –12 0C. In the result, while average breakdown ration of the aggregates created by portland cement were 59.19 and 54.26 % at 25 and 100 days of incubation, respectively, breakdown ration of the aggregates in the control sample were 29.92 and 53.68 % at 25 and 100 days of incubation, respec-tively. In addition, the soil samples treated with 4 % of portland cement and control equilibrated at field capacity water content were incubated at the room condition and 25, 30, 35, 40, 45 and 50 0C. The highest aggregate stability value (42.47 %) was measured at 30 0C.
Abstract
Bu çalışmada;kaymak tabakası problemi bulunan bir toprağa ilave edilen portland çimentosunun oluşturduğu agregatla-rın stabilitesine, donma-çözülmenin etkisi laboratuar şartlarında araştırılmıştır. Saksılardaki topraklar tarla kapasitesine gelinceye kadar saf su ile ıslatılmış ve 100 günlük ikübasyona bırakılmıştır. İnkübasyonun 25. ve 100. günlerinde 1-2 mm arası agregatların stabiliteleri hem donma-çözülme öncesi ve hem de donma-çözülme sonrası yapılmıştır. Tarla kapasitesinde ıslatı-lan agregatlar beş defa –12 0C’de donma-çözülme çevrimine tabi tutulmuştur. Sonuçta, 25 ve 100 günlük inkübasyon sonunda portland çimentosu ilavesiyle oluşan agregatların ortalama % 59.19 ve % 54.26’sı bozulurken, bu oran kontrol örneğinde % 29.91 ve % 53.68 olmuştur. Ayrıca % 0 ve % 4 oranında portland çimentosu ilave edilen örnekler oda şartlarında, 25, 30, 35, 40, 45 ve 50 0C sıcaklıklarda bekletilmiştir. En yüksek agregat stabilitesi ( %42.47) 30 0C sıcaklık uygulamasında ölçülmüştür.
Details
| Primary Language | English |
|---|---|
| Subjects | Soil Sciences and Ecology |
| Journal Section | Research Article |
| Authors | |
| Publication Date | December 25, 2004 |
| Submission Date | January 1, 2004 |
| Published in Issue | Year 2004 Volume: 18 Issue: 34 |
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