Wood chip concrete packing ratio

Keywords wood-chip concrete, recycling of used timber, special cement paste, injection method of cement paste, wood-chip packing ratio, strength, specific gravity, thermal conductivity... 

Fig. 5 Packing ratio of wood-chip vs. bending strength of wood-chip concrete...

The relationship between the packing ratio of wood-chip and the bending strength of wood-chip concrete is shown in Fig. 5. At the age of 3 days and 7 days, the bending strength decreases linearly when the packing ratio is increased. 

The coefficient of linear thermal expansion of wood-chip concrete was measured by the push rod meter at JTCCM. The result of measurement is shown in Table 6. Because of the influence of moisture content, the coefficient of linear thermal expansion are different with the temperature range below and over 40°C. Within the range of -8 40°C, when the packing ratio of wood-chip is increased, the coefficient of linear thermal expansion increases. 

The wood-chip concrete with the packing ratio of 50, 60% and water cement ratio of 0.50, 0.60 can be sawed by a handy saw. 

Ratios of wood chip from palette, crating or packing material, concrete-form plywood, and others were 18%, 14%, 13%, and 4%, respectively. Mills that can use this type of recycled wood were limited. They selected the waste wood resources according to their own locations. 

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