()76 



NEW YOEK STATE MUSEUM 



case of fat lime means 3 to 5 vol. of sand to 1 measiTred vol. of 

 lime. This gives a plastic mortar which does not crack. 

 Richardson gives the following mortar experiments. 



Compositio7i and physical properties of the lime 

 Loss on ignition, Hg^ ^i^d S 



Insol. SiOg and silicates 



AigOs and FegOg 



MgO 



CaO 



1 



1.2 



8 



e .6 



, .. 95.6 



99.2 



Weight of cubic feet including voids 60 lb 



Voids 44^ 



Density of lump , 1 . 52 



Weight of CaO used 1000 



Weight of H,0 to slake 1000 



Weight of HoO for paste 1000 



Vol. of H,0 to one of CaO 2 



Vol. of paste 2000 



Weight of paste 2720 



Density of paste 1.36 



Characteristics of paste Thick 



Vol. of sand, moist 2000 



Weight of sand 3000 



Vol. of sand to lime 2 



Vol. of sand to paste 1 



Vol. of mortar 3320 



Weight of mortar 5740 



Density of mortar. 1 . 73 



Consistency of mortar Thick 



Dries Cracks 



2 



1000 

 2000 

 500 

 2.5 

 2560 

 3280 

 1.28 



3 



1000 

 2500 



• • • « • 



2.5 



2712 

 3392 

 1.25 



Thick Medium 



3000 5000 

 4500 7500 

 3 5 



1.2 1.8 



4400 5840 

 7760 30650 

 1.75 1.82 

 Medium Medium Sloppy 

 Dries without shrinking 



4 



1000 

 3000 



3 



3120 

 3880 

 1.24 

 Thin 

 7100 



10800 



7.1 



2.6 



7200 



13960 

 1.94 



5 



1000 

 4000 



4 



4120 



4850 



1.17 



Very thin 



14360 



20600 



14.4 



3.5 



13500 



25450 



1.88 



Very sloppy 



Percentage composition 



Water. 

 6and . . 

 Lime. . 



Return of water to lime. 



30 



52.6 



17.4 



100 

 1.7 



29.3 

 67.9 

 12.8 



100 

 2.3 



22.5 



68.1 



9.4 



100 

 2.4 



20.7 



72.2 

 7.1 



100 

 2.9 



15.1 



82 

 3.9 



100 

 3.9 



