Table 3: Chemical analyses and other data for Fort Sumter mortars (total mortar of binder and aggregate).

SpecimenNumber 5 bedding mortar above sea levelNumber 6 pointing mortar above sea sevelNumber 11 bedding mortar above sea levelNumber 3 bedding mortar below sea levelNumber 15 building, below infill soil level

CaO0.7354.5712.300.7426.79
MgO9.2015.535.050.7211.59
Al2O31.212.840.961.752.00
SiO2 (Total)82.6322.1180.2888.3357.73
Fe2O34.311.941.765.111.83
TiO21.250.15<0.021.670.06
Na2O<0.501.02<0.50<0.50<0.50
K2O0.701.830.141.68<0.05
Sum of constituents100.0399.99100.49100.00100.00
Insoluble residue, %60.7416.2076.4865.2148.15
XRD mineralogyCalcite, quartz, sodaliteCalcite, quartzCalcite, quartz, sylviteCalcite, quartz, iowaite, bassanite, bruciteCalcite, quartz, epidote
Soluble sodium or Na (ppm of solids)83920921492066851
Soluble calcium or Ca (ppm of solids)375251391818073184
Soluble chloride or Cl (ppm of solids)1232270614858017406
Soluble sulfate or SO4 (ppm of solids)72181555509824350
Rough mix proportions by volume
cement : lime : sand
1 : 2 : 41 :   :  1 : 4 : 9ND1 : 3.5 : 3