Vitrified Paving Brick: A Review of Present Practice in the Manufacture, Testing and Uses of Vitrified Paving BrickT.A. Randall & Company, 1910 - 121 páginas |
Dentro del libro
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Página 15
... iron . Lime Magnesia Ignition loss Total Per cent . .57.04 .18.26 6.38 2.41 1.98 .10.16 .96.23 Fire and Potters ' Clays . * Also known as " bastard fire clay " and pipe clay . Shales . possess the great advantage of being almost ...
... iron . Lime Magnesia Ignition loss Total Per cent . .57.04 .18.26 6.38 2.41 1.98 .10.16 .96.23 Fire and Potters ' Clays . * Also known as " bastard fire clay " and pipe clay . Shales . possess the great advantage of being almost ...
Página 16
... iron such clays generally contain , and as the latter is apt to be in the condition of disseminated grains of pyrite or limonite , it gives a brown or black speckled appearance to the light ground mass . The fluxing impurities should ...
... iron such clays generally contain , and as the latter is apt to be in the condition of disseminated grains of pyrite or limonite , it gives a brown or black speckled appearance to the light ground mass . The fluxing impurities should ...
Página 17
... iron ( Fe2O3 ) .... 2.0 9.0 6.7 Lime ( CaO ) 0.2 3.5 1.2 Magnesia ( MgO ) 0.1 3.0 1.4 Alkalies ( K2O , Na2O ) .. 1.0 5.5 3.7 Total fluxing constituents .. 13.0 Grand total .100.0 * There are many analyses in the current literature that ...
... iron ( Fe2O3 ) .... 2.0 9.0 6.7 Lime ( CaO ) 0.2 3.5 1.2 Magnesia ( MgO ) 0.1 3.0 1.4 Alkalies ( K2O , Na2O ) .. 1.0 5.5 3.7 Total fluxing constituents .. 13.0 Grand total .100.0 * There are many analyses in the current literature that ...
Página 18
... Iron . An important factor in the composition of shales is the condition of the iron , which is always present in quite large quantities in paving brick shales and which chemists almost invariably report in the form of the higher or ...
... Iron . An important factor in the composition of shales is the condition of the iron , which is always present in quite large quantities in paving brick shales and which chemists almost invariably report in the form of the higher or ...
Página 19
... iron , as the protoxide is much more fusible . It is also very desirable that the iron be uni- formly diffused through the clay , for if present as crystals , concretions or seams , it gives a mottled or spotted appear- ance and ...
... iron , as the protoxide is much more fusible . It is also very desirable that the iron be uni- formly diffused through the clay , for if present as crystals , concretions or seams , it gives a mottled or spotted appear- ance and ...
Otras ediciones - Ver todas
VITRIFIED PAVING BRICK A REVIE H. a. (Herbert Allen) B. 1859 Wheeler Sin vista previa disponible - 2016 |
Términos y frases comunes
abrasion absorption asphalt Board of Public Brick Manufacturers brick pavement building brick burning cent City of St clean cobble stone concrete condition contract contractor cost cross-breaking crushing density durable edges engineers factor filler foundation fusible Galesburg Gomer Jones granite gravel greatly grout hard hauled heat heavy horse impact factor impure fire clays inches iron joints kiln marks laid laminations large cities less Louis macadam machine Magnesia marginal curb material ment method mixed mixture mud process Overburned party paving brick plants plastic porosity porous Portland cement pounds Prof Public Improvements range rattler test repairs repressed roller rolling Salt Glazing samples sand cushion Sesquioxide sewers shale pavers shovel shrinkage soft brick sorbed specific gravity square yard standard steam shovel stone blocks stone pavements Streator Street Commissioner strength subgrade surface clays thick tion tough traffic uniform usually vary vitrified brick wear weather weight
Pasajes populares
Página 108 - In testimony whereof, the said parties of the first part have hereunto set their hands and seals the day and year first above written.
Página 102 - ... his servants or agents, in the construction of said work, or by or in consequence of any negligence in guarding the same, or any improper materials used in its construction, or by or on account of any act or omission of the said contractor...
Página 121 - ... the pavement. This mixture, from the moment it touches the brick, shall be thoroughly swept into the joints. Two such boxes shall be provided in case the street is twenty feet or less in width; exceeding twenty feet in width, three boxes should be used. The work of filling should...
Página 118 - After this first passing of the roller the pace may be quickened and the rolling continued until each brick is firmly embedded in the sand cushion.
Página 121 - To avoid the possibility of the thickening at any point, there should be a man with a sprinkling can, the head perforated with small holes, sprinkling gently the surface ahead of the sweepers. Within one-half to three-quarters of an hour after this last coat is" applied and the grout between the joints has fully subsided and the initial set is taking place, the whole surface must be slightly sprinkled and all surplus mixture left on the tops of the brick swept into the joints, bringing them up flush...
Página 104 - Engineer; the time of beginning, rate of progress, and time of completion being essential conditions of this contract; and if the contractor shall fail to complete the work by the time above specified, the sum of per day, for each and every day thereafter, until such completion, shall be deducted from the moneys payable under this contract.
Página 91 - It shall leave by weight a residue of not more than 8 per cent on the No. 100, and not more than 25 per cent on the No. 200 sieve.
Página 121 - ... mixture, one-half inch of sand shall be spread over the whole surface, and in case the work is subjected to a hot summer sun, an occasional sprinkling, sufficient to dampen...
Página 120 - The mixture shall be removed from the box to the street surface with a scoop shovel, all the while being stirred in the box as the same is being thus emptied. The box for this purpose shall be...
Página 108 - ... pay to the proper parties all amounts due for material and labor used and employed in the performance thereof, then this obligation to be void, otherwise of full force and effect. and the same may be sued on at the instance of any material -man, laboring man or mechanic, in the name of the City of St.