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 aims to develop the concrete blocks mixed with cassava pit waste. There are 6 mixing ratios among Portland cement type1: rice hush ash: quarry dust: cassava pit waste: water reducer type A: tap water that include 0.7: 0.3: 10: 0: 0.02: 0.6 0.7: 0.3: 9.9: 0.1: 0.02: 0.6 0.7: 0.3: 9.7: 0.3: 0.02: 0.6 0.7: 0.3: 9.4: 0.6: 0.02: 0.6 0.7: 0.3: 9.1: 0.9: 0.02: 0.6 and 0.7: 0.3: 8.8: 1.2: 0.02: 0.6 by weight. The concrete block samples were casted same as the ordinary concrete blocks and test were conducted according to TIS.57-1990 standard. From the results the best proportion of concrete block mixed with coconut shell ash is 0.7: 0.3: 9.7: 0.3: 0.02: 0.6. The proper ratios of cassava pit waste can decrease the density or weight and increase the thermal insulation of concrete blocks. However the over amounts of cassava pit waste that effected to increase the water absorption and decrease the compressive strength properties of concrete blocks.

This research aims to produce the T-BAR particleboard from Physic nuts for interior building which are brought agricultural wastes to used for beneficial materials. Under the Thailand industrial standard (TIS-876-2547) specified the evaluated values such as desnsity water content water absorption thickness swelling bending strength elastic modulus and internal bonded. The experiment and evaluation processes between Physic nuts per Urea Formaldehyde ratio and Physic nuts per Phenol-cyanate based on 90:10 92:8 95:5 and 97:3 in consequence that we found the thickness of particleboard not more than 2 cm. The suitable ratio for Phenol-cyanate 92:8 percentage (Physic nuts 92% with Phenol-cyanate 8%) and suitable ratio for Urea Formaldehyde 90:10 percentage (Physic nuts 90% with Urea Formaldehyde 10%) at 120 Celsius temperature on pressing process. The Phenol-cyanate glue ratio of 0.80 gram per cubic centimeter suited to produce the particleboards averaged water content before pressing 8.89% suitable pressure in process 150 pound per square inch water content 7.65% density 0.818 gram per cubic centimeter water absorption 14.23% during 2 hours thickness swelling 8.02% during 2 hours internal bond 0.56 MPa bending strength 21.45 MPa modulus 2116 MPa. The Urea Formaldehyde glue ratio of 0.82 gram per cubic centimeter suited to produce the particleboards averaged water content before pressing 9.84% suitable pressure in process 152 pound per square inch water content 8.63% density 0.833 gram per cubic centimeter water absorption 14.36% during 2 hours thickness swelling 8.95% during 2 hours internal bond 1.39 MPa bending strength 22.37 MPa modulus 2117 MPa. As the results shown that both of Urea Formaldehyde and Phenol-cyanate with Physic nuts passed the TIS 876-2547 standard. The Physic nuts can produce the particleboards for using inside building.