This paper present the engineering properties of asphalt (AC 60/70) modified with different ratios of crumb rubber. Then select the best properties of the binder to mix asphaltic concrete. From laboratory testing results with adding 11% crumb rubber into mixtures for the best results. The properties of asphaltic concrete can be improved by adding 11% crumb rubber. For asphaltic concrete Marshall Stability increased and flow decreased with adding crumb rubber into asphalt. Comparing to ordinary asphaltic concrete (AC 60/70) the rutting resistance was increased 18% for crumb rubber modified asphalt respectively. Moreover the fatigue resistance of crumb rubber modified asphalt improved to be 1.59 times compared to AC 60/70.

This paper present the engineering properties of asphalt (AC 60/70) modified with different ratios of natural rubber. Then select the best properties of the binder to mix asphaltic concrete. From laboratory testing results with adding 6% natural rubber into mixtures for the best results. The properties of asphaltic concrete can be improved by adding 6% natural rubber. For asphaltic concrete Marshall Stability increased and flow decreased with adding natural rubber into asphalt. Comparing to ordinary asphaltic concrete (AC 60/70) the rutting resistance was increased 22% for natural rubber modified asphalt respectively. Moreover the fatigue resistance of natural rubber modified asphalt improved to be 2.06 times compared to AC 60/70.

This objective of this research is to study the development of the pararubber tapping knife in order to determine the optimum of the edge and oblique angle and to compare the efficiency of the electrical motor and Je-Bong knife. The product was manufactured by iron steel carbon S45C and AISI 5160 with 75-90 degree edge knife and 0-45 degrees oblique angle. The results can be concluded that the optimum condition of the edge knife oblique knife and the cutting force were 75 degree 45 degree and 3.51-51.42 N respectively. It was found that the cutting force was straightly increased form 0-51.42 N and then gradually decreased. The energy consumption of timber cutting was 0.00370 J/mm3. The quality of the rubber tap using electrical motor was 72.07% which was higher than 2.8 of Je-Bong knife. As the results this product shows the average of rubber timber which is 2.22 mm. in 22.51 s.

The special project on bouquet arrangement made with para rubber is designed with an objective to study the invention of bouquet arrangement made with para rubber and satisfaction of the targeted group on bouquet arrangement made with para rubber . The researchers made a study and collected related information before making the design on bouquet arrangement made with para rubber for three models and presented to 7 experts for selection of the most suitable bouquet arrangement made with para rubber comments to prepare the conceptual model. The product was made and presented to survey the satisfaction of the targeted group of 50 persons with the questionnaires. Then the data were analyzed with frequency statistics percentage and average and presented in the table supporting the analytical article as follows. 1. Most experts selected Conceptual Model 1 because it was beautiful with appropriate balance proportion for preparation of the bouquet arrangement made with para rubber and Prachamyam design was suitable to Feung (flower string) and Uba (garland) due to the elegance and fineness of the materials employed. 2. For the satisfaction of the targeted group on the bouquet arrangement made with para rubber it was found that for the product the targeted group was satisfied with the color of the bouquet at the highest level with the average of 4.54 for the utility the satisfaction on value added to para rubber was at the highest level with the average of 5.00 for the price the satisfaction on the price of 5001 baht and above was at the highest level with the average of 4.30 and for the distribution premise the satisfaction on distribution at Chatuchak market and shops for monk’s items was at the highest level with the average of 4.36.

This research aims to study the development of the Para rubber press machine with wrought pattern for continued 2-year project. Used natural Para rubber mixed in ta-Kuong by normally practical Para rubber farmers to evaluate the rubber press machine. It has developed the 11 roller the 3 plain duo sets of normal press rollers and the 2 duo sets of wrought rubber press rollers with the induction motor at 1430 rpm. The rotating transmission based on belts and chains. The evaluated results produced the dried Para rubber sheets thickness at 3.75 mm. on average as standard market need. From a robber sheet with enough patted on with a worker to carry the ta-Kuong to a top tray and a rubber press man to put the Para rubber piece to a machine on average the completed 185 wrought rubber sheets per hour in shorter time.