Bulletin, Masalah 37Geological Survey., 1921 |
Edisi yang lain - Lihat semua
Istilah dan frasa umum
48 mesh acres aggregate amount Atlanta average bars belt brick bucket cars cement cent coarser cent retained Central of Georgia Chattahoochee River chert clay gravel clayey sand coarse sand coarse-grained sand coarser than 48 color value commercial concrete sand COUNTY No sand Creek cubic yards depth Fall Line feet in thickness feet thick feet wide feldspar fine-grained sand fineness modulus Flint River Georgia Railway Georgia sands glass sand grading gravel deposits gravel occur gray hill limonite Little Ocmulgee River Lumber City Macon material mile east miles north miles south miles west minerals molding sand mortar Muscogee County Oconee River Ogeechee River organic matter oxide pebbles percentage produced pump quantities quartz quartzite railroad ranges rock Sample sand and gravel sand occurs sand or gravel sandstone sandy clay Satilla River schist screen shows a fineness silica stream bed suitable surface tests underlain usually washed white sand
Bagian yang populer
Halaman 11 - Fill a 12-oz. graduated prescription bottle to the 4#-oz. mark with the sand to be tested. Add a 3 per cent solution of sodium hydroxide until the volume of the sand and solution, after shaking, amounts to 7 oz. Shake thoroughly and let stand for 24 hours.
Halaman 12 - A standard color solution shall be prepared by adding 2.5 cc of a 2 per cent solution of tannic acid in 10 per cent alcohol to 22.5 cc of a 3 per cent sodium hydroxide solution.
Halaman 81 - ... ordinary glass tumblers of the same size are filled to the brim, one with the dry sand to be tested and the other with water. The water is then poured carefully from the one glass into the sand in the other until it reaches the point of overflowing. The volume of water removed from the glass which was originally full of water can be taken as an approximate measure of the voids in the unit volume of sand contained in the tumbler. A simple calculation will reduce this to percentage volume.
Halaman 78 - ... screen; at least 65 and not more than 85 per cent of the total fine aggregate to be retained on a 200-mesh sieve.
Halaman 48 - ... are those in which there are no medium grains, and in which the coarse grains are found in a proportion double that of the fine grains, cement included.
Halaman 64 - The finer sand is said by some to "burn out" in the batch and not produce as much glass per unit as does coarser sand. The grains larger than 30 mesh on the other hand are more difficult to fuse. This lowers the amount of sand each furnace can melt per day and consequently increases cost of production. As already noted, in a mixture of coarse and fine sand the finer is liable to settle to the bottom of the batch, thus preventing an even mixture of the materials and producing in consequence a glass...
Halaman 46 - ... the quantity of the medium size stone of the aggregate and increasing the quantity of the coarsest stone. An excess of stone of medium size, on the other hand, appreciably decreases the density and strength of the concrete.
Halaman 84 - The shape of the grains' of a sand has a marked influence, when combined with their size and grading, upon the character of the asphalt surface mixture made with them. ****Mixtures made with round-grained sands are of course less stable***than those made with sharp sand, since round particles move much more readily over one another than sharp ones; but, on the other hand, with plenty of filler this tendency can be neutralized, while the roundgrained sands can be packed much more readily and closely...
Halaman 89 - The sand shall not contain more than 2 per cent, by weight, of lime and magnesia taken together and calculated as carbonates.