A Treatise on Civil Engineering |
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Page 6
... proportions . They differ only in their structure - gneiss being a stratified rock , the ingre- dients of which occur ... proportion of its constituents . When the quartz is in excess , it renders the stone hard and brittle , and very ...
... proportions . They differ only in their structure - gneiss being a stratified rock , the ingre- dients of which occur ... proportion of its constituents . When the quartz is in excess , it renders the stone hard and brittle , and very ...
Page 9
... proportion of clay , or of magnesia , yield , on calcination , those cements which , from their posses- sing the property of hardening under water , have received the various appellations of hydraulic lime , water lime , Roman cement ...
... proportion of clay , or of magnesia , yield , on calcination , those cements which , from their posses- sing the property of hardening under water , have received the various appellations of hydraulic lime , water lime , Roman cement ...
Page 11
... , it appears highly probable that the magnesian limestones , containing a cer- tain proportion of magnesia , will be found fully equal to the argillaceous , from which hydraulic lime has hitherto been BUILDING MATERIALS . 11 ARTICLE.
... , it appears highly probable that the magnesian limestones , containing a cer- tain proportion of magnesia , will be found fully equal to the argillaceous , from which hydraulic lime has hitherto been BUILDING MATERIALS . 11 ARTICLE.
Page 14
... proportion of iron in the state of a protoxide , a circumstance generally unfavorable to its durability . Besides the various chemical combinations of iron , potash and clay , when found in considerable quantities , both in the primary ...
... proportion of iron in the state of a protoxide , a circumstance generally unfavorable to its durability . Besides the various chemical combinations of iron , potash and clay , when found in considerable quantities , both in the primary ...
Page 15
... proportion of mica , the fine - grained silicious sand - stones which are free from clay , and carbonate of lime , form a durable material when used in blocks for paving . Mica slate , talcose slate , hornblende slate , some varieties ...
... proportion of mica , the fine - grained silicious sand - stones which are free from clay , and carbonate of lime , form a durable material when used in blocks for paving . Mica slate , talcose slate , hornblende slate , some varieties ...
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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.