จำนวน Repository ( 891 )

การใช้เทคโนโลยีสำหรับชุมชนการพัฒนาผลิตภัณฑ์บล็อกประสานจากเศษหินบะซอลต์
การใช้เทคโนโลยีสำหรับชุมชนการพัฒนาผลิตภัณฑ์บล็อกประสานจากเศษหินบะซอลต์

This research aims to study the using basalt rock fragments to develop as interlocking block product. The mixture ratios of Portland cement type1: basalt rock fragments are 11 : 6 1 : 6.5 1 : 7 1 : 7.5 and 1 : 8 by weight and water per cement ratio was 0.6 by weight. The interlocking block samples are cast in 10 x 20 x 10 cubic centimeter of dimension with manual compression molding machine. The interlocking block samples were tested in accordance with TCPS 602-2547 standard which subjected for the interlocking block. The results show that the weight compressive strength and thermal conductivity of interlocking blocks with high quantity of basalt rock fragments are lower than interlocking blocks with low quantity of basalt rock fragments while that the water absorption of interlocking blocks with high quantity of basalt rock fragments are higher. From this research the medium and small enterprises could choose the proper ration for the interlocking block production mixing basalt rock fragments as per requirement.

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การศึกษาพัฒนาส่วนผสมโลหะทองขาว 6k สำหรับการผลิตตัวเรือนเครื่องประดับ
การศึกษาพัฒนาส่วนผสมโลหะทองขาว 6k สำหรับการผลิตตัวเรือนเครื่องประดับ

This Research is to Study the Development of 6k White Gold Alloys for Jewelry Production. The Influence of Admixtures on Mechanical Properties was Investigated (Tensile Strength and Hardness) of 6k White Gold Alloys at Various Composite Ratios. The Results of the Experiments Show that the Chemical Composition of 6k White Gold Alloys is Slightly Different when Compared with the XRF (X-ray Fluorescence Spectrometers). Compare the pre and Post-Melting Quantities. Test results of Mechanical Properties of Test Pieces. The Tensile Strength of the 6k Gold Alloy is 25% Au+46%Ag+8%Cu+3%Zn+18%Pd The Highest Value was 1.14 kN / mm2 the Lowest Percentage was 64% and the Hardness was 259.87HV. The Result of this Test is that the Mechanical Properties of the Material are Brittle Material. When the Mold is Formed the Fracture and Forming will be Difficult. 25%Au+42%Ag+12%Cu+3%Zn+ 18%Pd 25%Au+50%Ag+4%Cu+3%Zn+18%Pd and 25%Au+54%Ag+0%Cu+3%Zn+ 18%Pd Tensile Strength in the Range of 0.66-0.70 kN / mm2 Percentage of Elongation in the Range of 84-90% and Hardness of 277.60 244.60 and 186.73HV Respectively. The Mechanics will Show that the Alloys of White Gold 6k 25%Au+54%Ag+0%Cu+3% Zn+18%Pd Have Similar Tensile Strength. The Maximum Percentage of Elongation is 90% and the Minimum Hardness is 186.73HV. It is Suitable for Forming because it has Ductile Material. This is a Good Mechanical Property in the Metal Forming Machine.

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การพัฒนาผลิตภัณฑ์กระเบื้องยางธรรมชาติต้นทุนต่ำที่มีสมบัติต้านทานการลามไฟ และใช้เศษขยะพลาสติกเอทธิลีนไวนิลอะซิเตทความละเอียดสูงเป็นสารเติมแต่ง
การพัฒนาผลิตภัณฑ์กระเบื้องยางธรรมชาติต้นทุนต่ำที่มีสมบัติต้านทานการลามไฟ และใช้เศษขยะพลาสติกเอทธิลีนไวนิลอะซิเตทความละเอียดสูงเป็นสารเติมแต่ง

This research aims to develop the natural-rubber floor tiles mixed with high fineness ethylene vinyl acetate plastic wastes (EVA plastics) from the factories. The study use natural-rubber STR 20 at 100 phr with various contents of EVA plastics (e.g. 0 5 10 20 40 and 80 phr) and then mixed with chemical substance at constant ratio include zinc oxide at 5 phr stearic acid at 2 phr mercaptobenzothiazole at 0.5 phr diphenyl guanidine at 0.2 phr and sulfur at 3 phr. The samples are ground by two-roll mill and formed by compression molding at 150 degree Celsius with 30x30x0.2 cm of dimension. The properties of the natural-rubber floor tiles are tested under ASTM standard. From the results it is found that the natural-rubber floor tiles mixed with 10 phr of EVA plastics is the suitable ratio for using as the rubber floor tiles in building. This ratio can increase the hardness tensile strength and wear resistant properties and decrease the density and thermal insulation properties when compare to the natural-rubber floor tiles without EVA plastic.

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การศึกษาและพัฒนาวัสดุปูผิวทางแบบแอสฟัลติกคอนกรีตผสมด้วยยางแผ่นรมควัน
การศึกษาและพัฒนาวัสดุปูผิวทางแบบแอสฟัลติกคอนกรีตผสมด้วยยางแผ่นรมควัน

This research presents the engineering properties of asphalt (AC 60/70) modified with different ratios of rib smoked sheet. Then select the best properties of the binder to mix asphaltic concrete. From laboratory testing results with adding 9% rib smoked sheet into mixtures for the best results. The properties of asphaltic concrete can be improved by adding 9% rib smoked sheet. For asphaltic concrete Marshall Stability increased with adding rib smoked sheet into asphalt. Moreover the stiffness modulus of asphaltic concrete can be improved 9.03 compared to AC 60/70.

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การศึกษาสีธรรมชาติจากฝักคูนเพื่อพัฒนาผลิตภัณฑ์สิ่งทอที่สามารถป้องกันรังสีอัลตราไวโอเลต
การศึกษาสีธรรมชาติจากฝักคูนเพื่อพัฒนาผลิตภัณฑ์สิ่งทอที่สามารถป้องกันรังสีอัลตราไวโอเลต

Study of Natural Dye from Golden Shower Pod for Development of UV Protection on Textile Product aimed to examine natural dyes obtained from Golden Shower Pod to produce naturally dyed fabrics as products. According to the research it was found that cationic additives which were soaked in a ratio of 20 grams per liter and boiled at 100 degrees Celsius for 20 minutes could help enhance the intensity of fabric dyes and the mordant used in this research which was soaked after dying was copper (ll) sulfate at concentration of 10 grams per liter for 30 minutes. According to appropriate tests the value of ultraviolet rays was excellent the dye fastness to artificial sunlight was moderate the abrasion was very good the dye fastness to acidic perspiration was good the dye fastness to alkaline perspiration was less and the dye fastness to water was good. According to the questionnaires returned it was found that the sample was interested in knitted apparel products most demands in the shade were darker tones and the apparel design concept chosen was mini dress with 1960s vintage style by matching dark and light brown of natural dyes of Koon pods. According to the assessment of satisfaction towards the products made from UV-resistant fabrics it was found that the form of products that are suitable to wear everyday was highest (58 percent) the form of the products that are appropriate for women in the age range 20-30 years was highest (66 percent) the arrangement of light - dark dyes of fabrics was highest (42 percent) the appropriateness of colors of embroidery threads was highest (58 percent) the appropriate relationship between patterns colors of embroidery threads and colors of fabrics was highest (76 percent) the appropriate placement of patterns was highest (40 percent) the appropriate size of patterns was highest (48 percent) the appropriate rhythm and continuity of patterns was highest (36 percent) the overall usability of products made from natural dyes that can block ultraviolet radiation was highest (82 percent) the appropriate relationship between embroidery patterns materials and fabrics was highest (12 percent) and the products (apparel) that can be worn at any occasion was highest (52 percent).

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