344 
COX, REIBLING, AND REYES. 
TABLE XVI.—Sand-lime brick made from basalt rock quarry débris. 
Degree of pulverization in per cent passing Compressive 
through the standard specified sieves. Duration Molding strength. 
Mixture) of steam i oee 
No. eg square Per 
No. 20. | No. 40. No. 80. | No. 100. | No. 200. inch. Total. square 
inch. 
Hours. | Pounds. | Pounds. | Pounds. 
23 75.6 43.7 25.8 22.9 17.0 8.0 7, 640 12, 080 3, 020 
23 15.6 43.7 25.8 22.9 17.0 8.0 10, 000 15, 280 3, 820 
my l : ini, 22 : 
Molding pres- Density. Absorption after 24 hours in water. 
Mixture | sure in pounds 
No. per square 
inch. Air dry. Dried at 110°. Air dry. Dried at 110°. 
23 10, 000 2.34 2.28 3.8 6.1 
Transportation from the Talim Island quarry, which is near 
Binangonan, involves only water transportation and costs under 
fairly economic administration about 1.15 pesos per cubic meter. 
At the present time the price of crushed stone from Talim is 
2.70 to 2.90 pesos per cubic meter at the Manila water front. 
Sisiman is directly across the bay, and, although about 55 kilo- 
meters from Manila, the cost of transportation should not be 
prohibitive as it would be entirely over deep water.. At present, 
crushed stone from Sisiman costs 3.50 pesos at the Manila water 
front, but as the quarry débris is a waste product it should cost 
much less. These costs are so much higher than Pasig sand, 
which can be purchased for 97 centavos, or less, and the cheaper 
beach sand, that the manufacturer probably would care to use 
the crushed rock only for special purposes such as tiles and 
marble, for which it is especially adapted. However, the cost 
of production can be retained at a normal figure by mixing the 
quarry débris with beach sand or crushed volcanic tuff. The 
latter can be quarried at Guadalupe and transported to the Pasig 
River for about 48 centavos per cubic meter. 
PLANT SITE IN MANILA. 
We believe that an economic scheme for utilizing the materials 
in the vicinity of Manila would be to locate a sand-lime brick 
plant on the bank of the Pasig River adjacent to the voleanic 
tuff, and bring limestone from Binangonan. This plan would 
avoid a long haul to the factory of supplies such as fuel, machinery, 
