Properties of pumice aggregate mortar blended with para rubber wood fly ash (PRWFA) replaced type 1 ordinary Portland cement (OPC) in different proportions of 020 and 40 wt.% OPC and dosed with used engine oil (UEO) in proportions of 00.2 and 0.3 wt% water were investigated. Whole mix type specimens size was cast in 555 cm and curing in ambient temperature for 7 and 28 days. Testing series of physico-mechanical properties performed on bulk density water absorption electrical resistivity Shore hardness and compressive strength were determined. Moreover microstructure via scanning electron microscope was analyzed. Effect of curing ages enhanced properties of samples such as electrical resistivity Shore hardness and compressive strength. Particularly the 28-day specimen that contained 20wt.% PRWFA and 0.2wt.% UEO provided bulk density of 1.61 g/cm3 and highest compressive strength of 22.09 MPa.

The development of lightweight flat sheet prototype from para rubber leaves and para para rubber wood fly ash for field work application can offer an alternative method of adding value to agricultural wastes and help to conserve the environment with green products. The natural fiber especially agricultural waste fiber is an encouraging prospect. Natural fiber composites have been used for building applications. The aim of this research was to investigate the potential use of para wood ash to producing a cement composite as an environmentally material. Material. The cement paste with 5-2 % weight of para wood ash. The specimens were cured at 25± 2 oc for 24 hours. The properties of cement composites mixed with different proportions of para wood ash were compared with Ordinary Portland Cement (OPC). In addition the morphology of para wood ash was examined by using scanning electron microscope. The density increased with the increase in the percentage of para rubber leaves from 1% 2% 4% and 6%. The finding is attributable to the enhanced packing density by the fine para wood ash particles size was found 5-10 um.Moreover para wood ash particles could arrange to fill the inter-particle voids in cement pastes which resulting to increase the compressive strength of cement paste. Consequently para wood ashes could incorporate in the construction materials to enhance the mechanical properties and durability performance of the cement composites

This research is a studying and developing building constructing material that is reducing the usage of energy in a building and it is made from rubber and rice straw. This research aims to both improve the economic and raise the energy conservation idea. This research will find the proper building material that is heat resistance. From interviewing the expert the researcher came up with the best formula to produce this heat resistance board. The formula is to add water to the rubber (one part rubber and three parts water) and spay it on a flatted bed of rice straw. Then heat it for one hour in a temperature of one hundred degree Celsius. After that mix in borax to make this material heat and fire resistance. All theses testing; the heat resisting and water absorbing this material has past the standard to be used in an indoor building constructing (มยผ. 8101-51) Department of Public works and town planning Ministry of Interior 2008. From that point on the researchers designed a pattern on the material to add the look for home and building decorating. Therefore they are two sizes of the material; 0.60 x 0.60 x 0.10 meter and 0.60 x 1.20 x 0.10 meter.

The objective of this research were investigated for preparing a film of rubber for use in the spa business. It was a formula for the excellence of the film the study included the topic of different concentrations of latex a moment in the film to different concentrations of chitosan the effect of molecular weight of chitosan on the film the influence of solution pH on the film. And the spin speed homogenizer mixed with a suitable film forming. The stability of the film were under conditions simulating the relative humidity in the air. The preparation of films were mixing rate with a homogenizer to 1000 rpm the pH of the solution of chitosan is pH 5 the molecular weight of chitosan was 10000 KDa the concentration of chitosan was 0.1 percent in a solution of acitic acid at 2 percent and 25 percent concentration of the latex films are suitable for further development in the industrial.

This continued 2nd year researchaims to study the development of the para rubber press machine with wrought pattern for continued 2nd-year. Used natural para rubber mixed in a Ta-kuong by normally practical para rubber farmer style to evaluate the rubber press machine. A machine consists of the 11 roller sets in vertical pathway with press sticks on top. The components are as follows: a water press roller with a slope surface to reduce the diameter around 1-1.5 mm from a center the 3-pair sets of normal press rollers and the 2 duo sets of wrought pattern rubber press rollers with the induction motor at 1430 rpm. The rotating transmission based on belts and chains with a . The evaluated results produced the dried para rubber sheets thickness at 3.79 mm on average as the 2nd rubber sheet type standardin marketing need. From a top tray a farmer can put a sticky para rubber piece to a roller press machine easier than normal just 5.9 second on average with lower hand power to handler of the rubber pieces. In finally the wrought patternrubber sheets by a worker to carry the ta-kuong to a top tray of a rubber press machine and a rubber press man to put the para rubber pieces to a machine thus the completed 186 wrought rubber sheets per hour on average.