Hydration characteristics of Phyllostachys prominens wood-cement-water mixtures

Key words: 
• Phyollostachys prominens /
• cement /
• mixture /
• hydrationcharacteristics

Abstract: The evaluations were made on the compatibility between cement and Phyllostachys prominens wood by studying and compatible inhibitory coefficients based on temperature-time curve of Phyllostachys prominens woodcement- water mixture .The results showed thatPhyllostachys promonens inhibitory coefficients to two kinds of cement were .Comptatible coefficient to 425# cement was 23 % and to 525# was 28 %.Phyllostachys prominens inhibitory coefficients to 425# cement were , 259.0 , 236.0 and 26.0 with each additive such as Na2SiO3 , NaCl , BaCl2 and CaCl2 ;to 525# cement were 326.0 , 240.0 , 106.0 and 22.0 .Compatible coefficients to 425# cement were 27 %, 40 %, 51 % and 78 %;to 525# cement were 34 %, 46 %, 60 % and 85 % with above each additive .Addedg with CaCl2 after pretreatments of cold water , hot watter and 10 gkg-1 NaOH, inhibitorycoefficients to 425# cement were 12.0 , 11.0 and 9.4 ;to 525# cement were 10.5 , 8.4 and 7.2 .So conclusions could be drawed that Phyllostachy prominens wood could not be used directly in cement particle board because of its high inhibition .Additives could improve its compatablity to cement .Additives' effects in turn were :CaCl2 BaCl2 NaCl Na2SiO3 .Phyllostachy prominens wood compatabillty to 525# cement was higher than to 425# cement .Pretreatments could also improve bamboo wood compatability to cement .The effects were 10 g kg-1 NaOH hot water cold water .Only when it was used together with additives then could Phyllostachys prominens be used in half-dry cement particle board production .