Salt implementation steps:



1. Initial conditions

Application: 
Known mass of salt ms dissolved in known mass of water mw -> solution defined by concentration, for example molality b

Then absorption of salt solution into material -> known mass of solution msol if measured
-> or assumed full saturation of porous medium -> salt solution volume equals effective saturation moisture content Veff

Options for defining initial condition:

- 1. define initial mass densities for all balance equations separetely:

     * water mass 
     * dissolved salt mass
     * crystalline salt mass 

     requires calculation of water mass from solution mass: msol = ms + mw
                                                            b    = mols/mw = ms/(Ms*mw)
     a) given b and msol -> solve for ms and mw
     b) given x=ms/mw and msol -> solve for ms and mw
     c) given Veff, b -> compute rho(b) -> msol = Veff*rho -> continue from a)



1. Amount of dissolved salt solution
	IC_SOLMASS,		// Keyword: SolutionMass			[kg/m3]		'Solution mass density'

	Requires solution definition with concentration of solution in mol/kg(H2O)



2. Volumetric content of salt solution
	IC_SOLCONT,		// Keyword: SolutionContent			[m3/m3]		'Volumetric solution content'

	Requires solution definition with concentration of solution in mol/kg(H2O)
	Solution defined via stochiemetry and concentration


	Application: define fully solution-saturated sample where volumetric salt solution content is equal to ThetaEff.


3. 
	IC_SALTMASS,	// Keyword: SaltMass				[kg/m3]		'Salt mass density'

	Requires definition of crystalline salt species, e.g. "Na2SO4.10H2O"

	Application: define initial content of precipitated salt 





-> salt concentration (molality  mol/kg(H20) )
-> crystalline salt (salt mass density kg(salt)/m3(REV))



