| OCR Text |
Show GOOD POINTS ON CONCRETE Most Failures Originate In Selection of Sand and Gravel What Makes the Ideal Mixture. Concrete Is manufactured stone formed by mixing cement, sand and stone or gravel (1. e., pebbles) together to-gether with water. The cement is but a small part of the mixture and Is the product of skilled workmen under un-der the supervision of the manufacturer manufac-turer who must compete with all other makers of like material; but the sand and gravel constituting one-third one-third or one-half of the final product must be selected and prepared by the farmer and this is where most failures fail-ures originate. Various amounts of each are used according to the use to which the finished product is to be put. The mixture in which all the spaces or voids between the stones or gravel are filled with sand and all the 6paces between the grains of sand are filled with cement is the ideal mixture. |
