Effect of the curing time and combination of corncob (Zea mays L. ) ash with swelling clay on mechanical properties of soil in forest road

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HEIDARI A.R.; PARSAKHOO A.; NASIRI M.; HABASHI H.

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Journal: Journal of Wood and Forest Science and Technology Year:2018 | Volume:25 | Issue:3 Page(s): 1-18

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Title

Effect of the curing time and combination of corncob (Zea mays L. ) ash with swelling clay on mechanical properties of soil in forest road

Author(s)

HEIDARI A.R. | PARSAKHOO A. | NASIRI M. | HABASHI H. | Issue Writer Certificate

Keywords

Atterberg limitsQ1

Maximum dry densityQ1

Plastic indexQ1

SilicaQ2

Unconfined compressive strengthQ1

Abstract

Background and Objectives: Swelling soil such as clay soil is known as unsuitable material for forest transportation due to the high volume change and mechanical defects. The aim of this study was to investigate the capability of biologic stabilizers with Silica content such as corncob ash for enhancing and improving the mechanical strength of soil in recommended forest roads of district two in Bahramnia forestry plan in Golestan province. Materials and Methods: The combination percentage of corncob ash and curing time were the treatments of study. At first, the waste of corncob was collected from farmlands. The nodes of stem which have higher amount of Silica were separated and then grind and heated in furnace at 580° C for 2 hours. The 50 swelling soil samples were brought from the depth of 0-20 cm in 100 meters of recommended roads to the soil mechanic laboratory using the systematic randomized sampling method (each sample with a weight of 2 kg). Samples were treated by 5, 10, 15 and 20% corncob ash and in curing times of 7, 14 and 28 days the tests of Atterberg limits, standard proctor and Unconfined compressive strength were done with three replications. Results: Findings showed that the Plastic index decreased by increasing corncob ash to 5% and then the use of ash more than 5% increased the Plastic index. With increasing the amount of ash in the mixture, the dry bulk density of the mixture decreased and optimum moisture content increased. Maximum dry density was 1. 73 g cm-3 which was recorded in optimum moisture of 28. 5% and in corncob ash content of 5%. Unconfined compressive strength of the mixture increased until adding 5% of ash, and then the compressive strength decreased by increasing the ash content. Increasing the curing time causes that the Maximum dry density and compressive strength to increase whereas the Plastic index decreased. In most of the cases, there wasn’ t significant difference between the curing times of 14 and 28 days. Conclusion: Findings indicated that because of the pozzolonic properties of corncob ash, it is enough to use the optimum amount of 5% and curing time of 14 days for improving the mechanical properties of swelling clay soil of forest road bed.

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APA: Copy

HEIDARI, A.R., PARSAKHOO, A., NASIRI, M., & HABASHI, H.. (2018). Effect of the curing time and combination of corncob (Zea mays L. ) ash with swelling clay on mechanical properties of soil in forest road. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, 25(3 ), 1-18. SID. https://sid.ir/paper/366448/en

Vancouver: Copy

HEIDARI A.R., PARSAKHOO A., NASIRI M., HABASHI H.. Effect of the curing time and combination of corncob (Zea mays L. ) ash with swelling clay on mechanical properties of soil in forest road. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY[Internet]. 2018;25(3 ):1-18. Available from: https://sid.ir/paper/366448/en

IEEE: Copy

A.R. HEIDARI, A. PARSAKHOO, M. NASIRI, and H. HABASHI, “Effect of the curing time and combination of corncob (Zea mays L. ) ash with swelling clay on mechanical properties of soil in forest road,” JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, vol. 25, no. 3 , pp. 1–18, 2018, [Online]. Available: https://sid.ir/paper/366448/en

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