An Alternative Modeling Equation to Estimate Wood-Cement Inhibition as Function of Wood-to-Cement Ratio

摘要

An alternative formula to estimate wood-cement inhibitory factor (I_f) is presented, integrating the total released heat and the residual cooling heat recorded at 24h hydration limit, and weighted to the wood-to-cement ratio (WCR) and to the time to reach maximum heat released by the second cement reaction. Five different WCRs were tested based on 3, 7, 11, 15 and 20g of wood provided from 12 different Moroccan biomass species. According to the ANOVA results, there is no significant difference between the newly obtained I_f-value and the I_d-value deduced from the previously developed modeling C_s-index equation. The two extreme inhibition classification classes were defined: upper class (I_f > 95%), and lower class (I_f < 5%). The analysis of the WCR parameter effect on I_f-value showed the existence of different evolution trends: linear, logarithmic, polynomial and puissance curve shape, depending on wood species. This I_f-approach is compared with other inhibitory indices cited in the literature.