A Treatise on Civil Engineering |
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Page 14
... pieces . Iron in the form of protoxide , in some cases only , discolors the stone by its conversion into a peroxide.— This discoloration , while it greatly diminishes the value of some stones , as in white marble , in others is not ...
... pieces . Iron in the form of protoxide , in some cases only , discolors the stone by its conversion into a peroxide.— This discoloration , while it greatly diminishes the value of some stones , as in white marble , in others is not ...
Page 17
... piece of white statuary marble , which was taken as a stand- ard , represented by 100 , by means of fine emery and sand . The relative resistance was calculated from the weight lost by each substance during the operation . Comparative ...
... piece of white statuary marble , which was taken as a stand- ard , represented by 100 , by means of fine emery and sand . The relative resistance was calculated from the weight lost by each substance during the operation . Comparative ...
Page 54
... pieces B , upon which are mounted the gearings , and at the lower part the cross - piece cc ' , upon which are fixed the rests or steps for the lower part of the helices to run in . D are the cores of the helices , upon which are ...
... pieces B , upon which are mounted the gearings , and at the lower part the cross - piece cc ' , upon which are fixed the rests or steps for the lower part of the helices to run in . D are the cores of the helices , upon which are ...
Page 57
... pieces . 144. Common mortars , which have had time to harden , resist the action of severe frosts very well , if they are made rather poor , or with an excess of sand . The sand should be over 2.40 parts , in bulk , to one volume of the ...
... pieces . 144. Common mortars , which have had time to harden , resist the action of severe frosts very well , if they are made rather poor , or with an excess of sand . The sand should be over 2.40 parts , in bulk , to one volume of the ...
Page 70
... pieces removed . The block is then finished . If small , such as one man can handle , it may be safely removed after one day . Larger pieces , like sills , lintels , steps , platforms , etc. , should be allowed a longer time to harden ...
... pieces removed . The block is then finished . If small , such as one man can handle , it may be safely removed after one day . Larger pieces , like sills , lintels , steps , platforms , etc. , should be allowed a longer time to harden ...
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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.