Browsing by Author "Nipon Tanpaiboonkul"
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Item Activation Process for Cementitinous Materials(Journal of Science and Technology Mahasarakham University - วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม, 2010-03-31) Nipon TanpaiboonkulPozzolanic reaction is a reaction of pozzolanic material, which could be used as an additional material to Portland cement. Pozzolan is a siliceous and aluminous material (available in fly ash, rice husk ash and etc.), which reacts with calcium hydroxide and water to form calcium silicate hydrate (CSH) compounds like a cementitinous material but it is slowly reacted. The activation processes such as mechanical by grinding, thermal and chemical process can resolve this problem to increase the strength development in early age. Several research works have been conducted on the use of chemical process to improve the performance of cementitinous material because it is convenient to prepare specimens. Furthermore, it increases pH in a mixture and also the rate of a reaction could be increased. Therefore, the uses of activation processes for cementitinous materials are applicable for construction works or hazardous waste management.Item Residue of Lead in Soil and Plant on Street Isles in Mahasarakham Municipality(Journal of Science and Technology Mahasarakham University - วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม, 2010-03-02) Nipon TanpaiboonkulThe objectives of this study were to determine the amount of Pb accumulation in soil and plant on street Isles of Mahasarakham municipal area. Two main roads, Mahasarakham-Borabue and Mahasarakham-Kosumpisai roads were selected for this investigation. Amounts of Pb in the samples were analyzed by AAS technique after digestion with nitric and hydro chloric acid concentration. The amount of lead on Mahasarakham-Borabue road indicated higher than Mahasarakham-Kosumpisai road of all samples. The presence of Pb were determined as 1.47, 1.28, 1.62 and 2.27 mg./100 g. dry wt of sample as 0.74, 0.66, 1.08 and 2.12 mg./100 g. dry wt of sample in soil, grass, shrubbery and trees, respectively. The amount from 4 kinds of vehicle (2, 4, 6 and more than 6 wheel) data were collected at 07.00-09.00 am. 1.00-3.00 pm. and 4.00-6.00 pm. every Sunday and Monday between November and December, 2006. The study revealed that the traffic on Mahasarakham-Borabue road is more abundant than that on Mahasarakham-Kosumpisai road with 7441 and 7240 total vehicles, and the results show a direct significant relation on the amount of Pb accumulation.