International Journal of Soil Science 1816-4978 xxxx-xxxx Academic Journals Inc. 10.3923/ijss.2010.11.18 Kangrang A. Lamom A. Philakoun S. 1 2010 5 1 This study proposed the solution to reduce soil moisture content in making soil cement brick at factory condition during rainy season. Soil sample of Kalasin province (located in the Northeast region of Thailand) was selected as the case study. There are 3 considered methods of reduction of soil moisture at the factory such as on constructed sieve, housing building with solar energy and drying in open air. The weather condition and thickness of soil sample were considered. The results found that on the constructed sieve method can reduce soil moisture taking duration time about 6-15 days. In this method also varied soil sample level of surface sieve. The reduction of soil moisture at higher level from ground surface is faster than lower level. In case of housing building, the less soil thickness cases reached to the accepted soil moisture faster than the higher soil thickness using duration time of 6-12 days. For the drying in air case, the less soil thickness is also efficient to reduce than the higher thickness. This method used the time for about 5-18 days reducing moisture. The investment cost per quantity of dried soil for the first year and the future 10 and 15 years were investigated. The results found that drying in air case is the lowest and the constructed sieve is the highest. The housing building is the most suitable for using to reduce the soil moisture during rainy season in term of effective reduction and economy.

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