The objective of this research is to develop the high corrosion resistance and good thermal insulation precast adobe wall panels mixed with natural latex. The 6 ratios of Portland cement type1: clay: rice husk ash: straw: rice husk:waterproofed liquid: natural latex: tap water were designed including: 1: 3: 0.3:0.02: 0.02: 0.02: 0: 0.4 1: 3: 0.3: 0.02: 0.02: 0.02: 0.05: 0.4 1: 3: 0.3: 0.02: 0.02: 0.02:0.1: 0.4 1: 3: 0.3: 0.02: 0.02: 0.02: 0.15: 0.4 1: 3: 0.3: 0.02: 0.02: 0.02: 0.2: 0.4 and 1:3: 0.3: 0.02: 0.02: 0.02: 0.25: 0.4 by weight. The precast adobe wall panels castedas same as the common concrete and reinforced by the bamboo. From the resultsthe proper ratio of precast adobe wall panel mixed with natural latex was 1: 3: 0.3:0.02: 0.02: 0.02: 0.1: 0.4 ratio. The properties of the proper precast adobe wall panelincluded density 1810.83 kg/m3 water absorption 17.16 % compressive strength 15.13MPa bending strength 3.01 MPa thermal conductivity coefficient 0.234 watt/m.Kelvin. Moreover the proper precast adobe wall panel mixed with natural latex also was verified by TIS.2226-2548 with properties of impact resistance deflection and hardness in medium duty (MD) level. The proper amount of natural latex effected the precast adobe wall panels to improve the mechanical properties including: increase the compressive and tensile strength decrease the density thermal conductivity coefficient and water absorption.

This research aims to study the water hyacinth fiber inside high-density fiber cement board. By using ratio components among cement : fine sand : water hyacinth fiber : water : catalyst accelerated the formations of cement (aluminum sulfate (AI2 (SO4) 3) calcium chloride (CaCl2) sodium silicate (Na2SiO3)) on the ratio 1: 0.2: 0.075: 0.3: 0.03 by weight of total water hyacinth fiber with the steel grating inside. By compressing the mixture cast machine at normal temperature (30 - 35 °C). From the test results the ratio of B4 is the appropriate ratio from the 1st year research result to produce the high-density fiber cement board with the steel grating inside 0.81mm #0.5”. It can pass the TIS 878-2537 standard of Cement Board and good based-on high density and physical properties mechanical properties and thermal insulation. Accelerate the formation of the most suitable cement is calcium chloride (CaCl2).

The objective of this research is to develop the precast adobe wall panel with high corrosion resistance and good thermal insulation. The ratio of Portland cement type1 clay rice husk ash straw rice husk waterproofed liquid and tap water was mixed and casted as same as the common concrete and reinforced by bamboo. From the results the proper prototype ratio of precast adobe wall panel was Portland cement type1: clay: rice husk ash: straw: rice husk: waterproofed liquid: tap water which equal to 1: 3: 0.3: 0.02: 0.02: 0.02: 0.4 by weight. The properties of the precast adobe wall panel prototype included density 1797 kg/m3 water absorption 16.70% bending strength 2.61 MPa compressive strength 21.40 MPa thermal conductivity coefficient 0.314 watt/m.Kelvin. Moreover the precast adobe wall panel prototype also was verified by TIS.2226-2548 with properties of impact resistance deflection and hardness in medium duty (MD) level. These straw and rice husk effected the precast adobe wall panel to decrease the density bending strength thermal conductivity coefficient and increase the compressive strength and water absorption.

This research aims to develop the cement board from vesicular basalt fragment which reinforced with steel wire mesh. The ratio of Portland cement type1: fine sand: vesicular basalt fragment: sodium silicate: tap water was equal to 1: 2: 4: 0.03: 0.55 by weight. The 5 sizes of steel wire mesh (steel wire no.25) were installed including: 3/8” 1/2” 5/8” 3/4” and 1”. The cement boards were produced by compression machine. The property tests of cement-bonded fiberboard followed the TIS. 878-1994 standard (cement bonded particle board: high density). From the results the 3/4 of steel wire mesh size was the most suitable size for reinforcing the cement board from vesicular basalt fragment. This developed cement boards was the construction materials which had the high bending strength good thermal insulation and moisture protection properties.

This research study investigated the structure and electrical effect of the La3+ and Sm3+ co-modified BaTiO3 ceramics with formula Ba1-(x-y)(LaxSmyTi)O3. The concentration of of x was fixed at 0.010 while that of y varied from 0.010 to 0.040. The ceramics are prepared by a solid-state mixed-oxide technique. The phase formation behavior is studied using x-ray diffraction (XRD) The dielectric properties with temperature are broad as wide temperature rang. Results showed that co-modified BaTiO3 ceramic ratio of 0.010 to 0.020 still tetragonal structure where the A-site is disturbed by a group of rare-earth doped. In addition we also found that the dielectric constant increases with ratio of 0.010 to 0.020 and respond to higher frequencies that can be used in the applications circuit with high frequency.