12.5.4 Arrhenius Constant

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12.5.4 Arrhenius Constant

DIANA applies the Arrhenius constant c_A in some calculations of heat production [§12.5.1], and equivalent age [§12.5.3.1]. You may specify c_A as a fixed value, or dependent on temperature and/or degree of reaction. Note that specification of the Arrhenius constant is optional, if you don't specify it then DIANA assumes a fixed value of 6000K, which applies for concrete. [ c_A = 6000 ]

Fixed value (syntax)

$\begin{figure}\centering \begin{tabbing} \texttt{'MATERI'} \\ [-1.0ex] \rule{14... ...* \>\>\texttt{ARRHEN}\>\texttt{\textit{ca}}$_{r}\,$ \end{tabbing} \end{figure}$

ARRHEN: ca is the Arrhenius constant c_A .

Dependency on temperature (syntax)

$\begin{figure}\centering \begin{tabbing} \texttt{'MATERI'} \\ [-1.0ex] \rule{14... ...{r}\,\) {[} \ldots \texttt{\textit{can}}$_{r}\,${]} \end{tabbing} \end{figure}$

TEMARR: te1 ...ten are the temperatures T_{i=1, n} for which the Arrhenius constant values are specified.
ARRHEN: ca1 ...can are the Arrhenius constant values c_{A_{i=1, n}} for the corresponding temperatures.

Dependency on degree of reaction (syntax)

$\begin{figure}\centering \begin{tabbing} \texttt{'MATERI'} \\ [-1.0ex] \rule{14... ...{r}\,\) {[} \ldots \texttt{\textit{can}}$_{r}\,${]} \end{tabbing} \end{figure}$

DGRARR: r1 ...rn are the degrees of reaction r_{i=1, n} for which the Arrhenius constant values are specified.
ARRHEN: ca1 ...can are the Arrhenius constant values c_{A_{i=1, n}} for the corresponding degrees of reaction.

Dependency on temperature and degree of reaction (syntax)

$\begin{figure}\centering \begin{tabbing} \texttt{'MATERI'} \\ [-1.0ex] \rule{14... ...}\,\) {[} \ldots \texttt{\textit{camrn}}$_{r}\,${]} \end{tabbing} \end{figure}$

DGRARR: r1 ...rn are the degrees of reaction r_{i=1, n} for which the Arrhenius constant values are specified.
TEMARR: te1 ...tem are the temperatures T_{i=1, m} for which the Arrhenius constant values are specified.
ARRHEN: ca1r1 ...ca1rn are the Arrhenius constant values c_{A_{i=1, n}} for the corresponding degrees of reaction and temperature T₁ , ca2r1 ...ca2n are the Arrhenius constant values for the same degrees of reaction but for temperature T₂ , and so on until the Arrhenius constant values camr1 ...camrn for the last temperature T_m .

Next: 12.6 Solidification or Evaporation Up: 12.5 Hydration Heat Previous: 12.5.3 Equivalent Age Contents Index

DIANA-9.3 User's Manual - Material Library
First ed.

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