Henry C. Adams
Capitolo 73
covers a roof of battens by the beach; and, further, if the concrete,
after it is mixed, it will withstand the action of the elements,
statement, as it will be, to air and sea-water, rains, warm sun,
and colds.
Some concrete structures have failed decadence of the material,
mainly among mark of water stop and low, and in order to
you verify the probable causes and to learn the precautions
what necessary is for taking, of the elaborate experiments they have
performed state.
It will be to appreciate the chemical actions that can happen,
how good to examine analysis of sea-water and cement. The water
some Irish Channel is composed of
Chloride of sodium.................... 2.6439 for cent.
Chloride of magnesium................. 0.3150 " "
Sulfate of magnesium................. 0.2066 " "
Sulfate of kick................... 0.1331 " "
Chloride of potassium................. 0.0746 " "
Bromide of magnesium.................. 0.0070 " "
I kick carbonate.................. 0.0047 " "
I fit with iron carbonate..................... 0.0005 " "
Magnesium nitrate.................. 0.0002 " "
Chloride of lithium................... Traces.
Ammonium's chloride.................. Traces.
Chloride of Silica.................... Traces.
Water.............................. 96.6144
--------
100.0000
A middle analysis of a cement of Thames can be taken to be as
it follows:--
Silica................................ 23.54 for cent.
Residual insoluble (sand, clay,
etc.)............................ 0.40 "
Alumina and ferric oxide............... 9.86 "
Cements.................................. 62.08 "
Magnesia............................... 1.20 "
Sulphuric anhydride.................... 1.08 "
Carbonic anhydride and water........... 1.34 "
Alkalies and loss on analysis.......... 0.50 "
-----
100.00
The figures following damage the analysis of a sample of cement