This research deals with paper production from lemongrass and producing a model product. The lemongrass was boiled in sodium hydroxide solution 400 grams per litre of water at 80 – 100 degrees Celsius for 3 hours. The separated fibre was then bleached with chlorine solution 20% per lemongrass fibre 1 kilogram per water 1 litre. Finally paper pulp was scooped for paper formation and lemongrass fibre paper was soaked with flame retardant 10% for 10 minutes at room temperatures. The physical properties of the paper were tested – mass per unit length longitudinal and cross section burn tearing strength absorption and heat resistance. This research was conducted by cutting lemongrass leaves to a uniform length boiling them to separate the fibres for toughness with high strength: the longer the lemongrass leaves the greater the strength. The dirt mixed was removed by boiling the separated fibre. To achieve quality standards the products should be designed analyzed evaluated and modeling. Sampling group evaluation were used to help develop lemongrass fibre products for commercial production using natural resource with maximum cost benefit and technology transfer to the target group. The result of this research was to develop and process home furnishing accessories and souvenirs such as lamps photo frames paper boxes tissue box and souvenirs. The procedure for this research was to analyze the satisfaction level of trainees from Sridonpai Dumnoen Saduak District Ratchaburi community and interested groups amd found that the service provided by officer trainer service processing and accommodation were on average of high level (X = 4.45 4.35 4.22 and 4.42 ordering)

The research of development Fancy yarn from Banana fiber and cotton fiber blend to seek Ratio of Banana fiber and cotton fiber to sliver by ROLLER CARD was found that Blending Banana fiber and cotton fiber at 20 : 30 30 : 40 40 : 60 and 50 : 50 to able to spin as sliver. Due to the quantity of Banana fiber there are quantity of yarn less than or equal with cotton fiber it made both fibers can cling together. In the parts of the suitable sliver laying direction to contain to the GAREBO YARN TUBE was found that the suitable laying direction to contain to the GAREBO YARN TUBE to find that the suitable Sliver laying direction is the longwise laying direction of GAREBO YARN TUBE because Sliver laid down orderly and was not overlay so it can easy draw thread and continues spin yarn. About Ratio and weight of sliver in GAREBO YARN TUBE that was affect to Fancy yarn spinning as SLUB YARN was found that the qualification of thread for seeking yarn twist yarn strength and Elongation (Percentage) of Banana Fiber: cotton Fiber 20:80 was found that the weight of Sliver 20 grams have yarn twist (turn/inches) mean 10.8 (Newton) of sliver 40 grams mean 6.27 and Elongation (Percentage) of sliver 30 grams mean 4.45. Banana Fiber : cotton Fiber 30:70 was found that the weight of Sliver 30 grams have yarn twist (turn/inches) mean 10.9 (Newton) of sliver 30 grams mean 7.68 and Elongation (Percentage) of sliver 30 grams mean 4.93. Banana Fiber : cotton Fiber 40:60 was found that the weight of Sliver 40 grams have yarn twist (turn/inches) mean 10.5 (Newton) of sliver 20 grams mean 6.20 and Elongation (Percentage) of sliver 40 grams mean 4.76. Banana Fiber : cotton Fiber 50:50 was found that the weight of Sliver 20 and 40 grams have yarn twist (turn/inches) mean 10.9 (Newton) of sliver 30 grams mean 6.07 and Elongation (Percentage) of sliver 20 grams mean 5.09. Banana Fiber : cotton Fiber 60:40 was found that the weight of Sliver 20 grams have yarn twist (turn/inches) mean 11.2 (Newton) of sliver 40 grams mean 5.34 and Elongation (Percentage) of sliver 40 grams mean 4.57.

Corrosion of steel reinforcements in concrete is one of the main causes of early deterioration and reduction of service loads of reinforced concrete (RC) structures. This paper reports the results of an experimental program that was carried out to evaluate the effect of reinforcement corrosion on the flexural performance of RC beams and to investigate the efficiency of externally bonded carbon fiber reinforced polymer (CFRP) sheets to repair the corrosion-damaged RC beams. Seven RC beams with the same cross section and reinforcement details were prepared including the control beam (B0). First tension reinforcements of six RC beams were corroded by using an accelerated impress-current process to obtain corrosion levels of 15% 30% and 50% of weight loss according to Faraday’s law. Then three beams were repaired using CFRP sheets attached to the bottom surface leaving the other three unrepaired. All beams were subjected to the four-point bending load test. The experimental results show that the corrosion specimens demonstrated a significant deterioration on the structural performance and the integrity by decreasing in their ultimate load capacity stiffness and ductility. The deterioration by corrosion of tension reinforcements can be successfully overcome using CFRP sheets as the repair material. The technique can restore the beam strength to its original design strength except specimen B50F2 having severe steel-corrosion damage of 50%. A conservative value of the ultimate bending capacity of the beams with low corrosions (15%-30%) can be predicted by using RC conventional models as suggested in ACI 318. However the opposite trend is obtained for the high corrosion beam (50%). Appling ACI 440.2R provision to predict the ultimate flexural capacity of corroded beams repaired with CFRP sheets shows rather fair values for low corrosions (15%-30%) but significantly overestimates the strength of the high corrosion beam (50%).

This is the study of a conductive sheath-core bicomponent fibers. The intentions of the experiments were to investigate feasibility of conductive sheath-core bicomponent fiber forming using selected materials and the fibers’ properties. The trails were to extrude the bicomponent fibers with conductive materials in sheath section and supporting materials in core section. The conductive carbon black was selected as conductive material to compound with polypropylene. The virgin polypropylene was chosen as core material in the fibers. It was problematic to form fibers using the conductive carbon black polypropylene compound alone therefore the virgin polypropylene was used as the core section in the fibers to promote production stability. The sheath-core carbon black compound bicomponent fibers were steadily produced with designated machine settings. The produced fibers were tested for their physical and mechanical properties and electrical conductivity. The results shows that the fibers with the carbon black polypropylene compound as the fibers’ sheath section and the virgin polypropylene as the fibers’ core section have conductive property. The conductivity of the fibers increased when their sheath sections were thicker as the ratio of the carbon black compound become higher. Even though thicker sheath section of the fibers (40% and over) have higher conductivity the physical properties of the fibers become weaken and less applicable as textile fibers.

Deterioration of reinforced concrete deep beam structure caused by chloride is severe andtakes up wide area even though the structure is not exposed to sea water or brackish water. Even the structure which is far from sea water or brackish water is affected by this problem.When the reinforced concreate deep beam structure is affected by chloride steel reinforced inside the structure is corroded resulting in reducing the cross-sectional area of the reinforced steel affecting load capacity deflection and beam failure. If there is no repair or strengthening such capabilities are continuously reduced until it is no longer safe to use the beam. Therefore it is necessary to repair or strengthening the deteriorated structure to be safely used. This research investigated strengthening of deteriorated reinforced concrete deep beam caused by chloride with 4 formats of carbon Fiber sheets to seek guidelines for the most efficient strengthening. The resultshowed that the strengthening by the 4 format of carbon fiber sheet could increase ultimate loadcapability yet could not improve ductility of the deteriorated beam to become close to the beamthat is not deteriorated. The strengthening that could increase the maximum ultimate load capability was the table format strengthening. In addition the strengthening that the carbon fiber making 45 degrees with the length of the beam could best prevent diagonal cracks.