Cement Quotes (8 quotes)
Engineering, too, owes its most useful materials to the achievements of chemists in identifying, separating, and transforming materials: structural steel for the framework of bridges and buildings, portland cement for roadways and aqueducts, pure copper for the electrical industries, aluminum alloys for automobiles and airplanes, porcelain for spark plugs and electrical insulators. The triumphs of engineering skill rest on a chemical foundation.
A man's own addition to what he learns is cement to bind an otherwise loose heap of stones into a structure of unity, strength, and use.
Data isn't information, any more than fifty tons of cement is a skyscraper.
The sand should be neither coarse nor fine but of a middling quality or about the size of the common pop[p]y seed. If the sand is too coarse the mortar will be short or brittle If the sand is too fine the cement will shrink and crack after it has been used.
The valuable properties of this cement depend in a great measure on the mode of preparing it for use. The mixing should therefore be conducted with care in order to form a perfect union of the powdered cement, sand and water. This can be best accomplished by the use of the New England corn hoe on a board floor or by beating with a hand stamper; not much labour is required if properly applied. Mechanics can judge when the mixture is perfect by the appearance of the mortar, which, when properly prepared, very much resembles putty.
This cement can be used in any situation and for any purpose to which any other mortar or hydraulic cement can be applied. It does not become perfectly hard within one or two months.
To every bushel of the powdered cement add one bushel of sand, mix them together and pass them through a sieve, then add a sufficient quantity of water to make it (by well mixing and working) about the consistency of a soft putty. It is then fit to use but should not be kept more than six or eight hours and should be thoroughly worked just before it is used.
We may almost say of him [Joseph Aspdin, inventor of Portland Cement] what the epitaph in St. Pauls Cathedral says of Sir Christopher Wren: If you seek his monument, look around.