STATE GEOLOGIST. 45 
TABLE No. 10. . 
Proportions of Sand, Cement, Lime, and Water in Pounds with the Cost 
of the Lime and Cement. Proportions by Volume. 
Values given in Cents. 
Pounds of Total 
weight | Cost of | Amount saved. 
: of 7 ; 
Sand. Cement. | Lime. eas Water.) Time. Cement. Total. he eins 
9 2.85 .00 2.01 2.31 | .000 1.075 .000 .000 
By YG) rare Bolly QAT| = 029 0.968 SON Smas tee OI 
Qari e oi .83 117/65) 2.36 057 .860 .158 .055 
Ota lO 1.74. leeill 2.44 .115 .645 Reilie .110 
Cee esietaen ob 92 | 2.68 | .172 330 573 | 201 
Oa |) eke) 5 | QO | BA seas 631 221 
oe 628 3.71 .20 2.85 .258 107 £710 .249 
Oss .00 4.12 | .00 WO) Ms | oPKoshl 000 £188 2216 
The conclusions reached were, first, that 10 or 20 per cent. of lime 
paste added to cement mortar did not materially affect its strength, but 
cheapened it from 2% to 5 per cent. of the cost of the cement. Second, 
that any greater per cent. of lime paste added, rapidly decreased the 
‘strength of the mortar without an adequate reduction in the cost. Third, 
that adding 10 or 20 per cent. of cement to lime mortar weakened instead 
of strengthened the mortar and increased the cost. The investigation also 
indicated that the addition of a small percentage of lime paste to cement 
mortar, or of cement to lime mortar, did reduce the harshness of the mortar 
in the one case and the stickiness of the mortar in the other, causing it 
to work much easier under the trowel, and from that point of view was a 
benefit to the mason. 
TABLE No. 11. 
Relative Strength of Mortars in Briquettes and in Joints. 
Mortar Composed of | Cohesion in Pounds per Square Inch. 
2 parts Sand and 1 part 
Cement and Lime Paste. Age Stored in 
Composition of the Paste. a Air. Water. 
Days. | 
Per cent. Per cent. of Between | In In 
of Cement. Lime Paste. Brick. | Briquettes. Briquettes. 
100 00 7 9.9 29.6 | Ova 
100 00 28 Po oll 38.6 | 49.3 
100 00 35 30.5 40.7 | 23 .4 
100 00 63 40.5 atest | At 
100 00 fia any 34.7 109.7 
80 20 42 IO po Ba 8 65.1 
40 60 28 Sra | 15 6 
10 90 28 6.9 15.1 
