A Treatise on Civil Engineering |
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Page 6
... latter , by decomposing , destroying the structure of the stone , and causing it to break up and disintegrate . Granite , gneiss , and sienite , differ so little in their essen- tial qualities , as a building material , that they may be ...
... latter , by decomposing , destroying the structure of the stone , and causing it to break up and disintegrate . Granite , gneiss , and sienite , differ so little in their essen- tial qualities , as a building material , that they may be ...
Page 7
Dennis Hart Mahan. and mica , the latter predominating . It is principally used as a flagging stone , and as a fire stone , or lining for fur- naces . 12. Buhr or Mill stone . This is a very hard , durable stone , presenting a peculiar ...
Dennis Hart Mahan. and mica , the latter predominating . It is principally used as a flagging stone , and as a fire stone , or lining for fur- naces . 12. Buhr or Mill stone . This is a very hard , durable stone , presenting a peculiar ...
Page 18
... latter in two essential points . It slakes thoroughly , like common lime , when deprived of its carbonic acid , and it does not harden promptly under water . Hydraulic cement , on the contrary , does not slake , and usually hardens very ...
... latter in two essential points . It slakes thoroughly , like common lime , when deprived of its carbonic acid , and it does not harden promptly under water . Hydraulic cement , on the contrary , does not slake , and usually hardens very ...
Page 19
... latter meager ; but , later experience having shown that all meager limes are not hydraulic , the terms are no longer of use , except to designate qualities of the paste of limes . 42. Hydraulic Limes and Cements . The limestones which ...
... latter meager ; but , later experience having shown that all meager limes are not hydraulic , the terms are no longer of use , except to designate qualities of the paste of limes . 42. Hydraulic Limes and Cements . The limestones which ...
Page 22
... latter to from 30 to 40 of the former , will produce a feebly hydraulic lime , which does not appear to increase in hardness after it has once set ; but that , with the same pro- portions , some hundredths of clay are requisite to give ...
... latter to from 30 to 40 of the former , will produce a feebly hydraulic lime , which does not appear to increase in hardness after it has once set ; but that , with the same pro- portions , some hundredths of clay are requisite to give ...
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Common terms and phrases
abutments action arch arranged artificial axis bars beam béton blocks bolts bottom breaking strain brick bridge caisson calcined carbonic carbonic acid cast iron centre chains chord clay common lime compression concrete connected construction cross curved cylinder deflection depth diagonal diameter durability embankment engineer experiments exterior feet flanch foundation fracture give hard heat Hodgkinson horizontal hot blast hydraulic cement hydraulic lime immersion joints kiln laid layer length limestones lower magnesia masonry mastic material ments metal mortar ordinary pieces piers pillars placed plates portion Portland cement pressure proportion puzzolana rails resistance ribs roadway Roman cement sand sheeting piles side slaked sleepers soffit soil solid span specific gravity spikes square inch steel strength structure struts suitable surface tensile tensile strength termed thickness timber tion transverse strain truss tube upper usually vertical voussoirs wall weight wire wrought iron yield
Popular passages
Page 136 - ... elasticity ; and judging from its slow increase afterwards, I was persuaded that it had not come on by a sudden change, but had existed, though in a less degree, from a very early period.
Page 419 - ... long. The fascines are laid in alternate layers crosswise and lengthwise, and the layers are either connected by pickets, or else the withes, with which the fascines are bound, are cut to allow the brushwood to form a uniform and compact bed. This method of securing a good bed for structures on a weak wet soil has been long practised in Holland, and experience has fully tested its excellence.
Page 175 - For the coping and top courses of a wall, the same objections do not apply to excess in length : but this excess may, on the contrary, prove favorable ; because the number of top joints being thus diminished, the mass beneath the coping will be better protected, being exposed only at the joints, which cannot be made water-tight, owing to the mortar being crushed by the expansion of the blocks in warm weather, and, when they contract, being washed out by the rain.