Henry C. Adams

Capitolo 78

tall and low water, as to be exposed twice in every twenty-
four hours and other bottom low water, as to be always
submerged. The blocks were also deposited under these
the conditions in the various places, the mortar one whom have put
to Esbjerb to the south of Denmark, to Vardo in the arctic one
Ocean, and to Degerhamm on the Baltic one, where the water is only
one-seventh as it climbs as the Sea of the North, while the concrete blocks
you/he/she was built above in the form of a breakwater or groyne to Thyboron
on the coast of the west of Jutland. To intervals of three, six, and
twelve months and two, four, six, ten and twenty years, some
of the blocks has, or it will be, he/she will take on and it will submit to
chemical tests, the material that is also examined for verifying
the effect of exposure on them. The blocks examined to
intervals less that one year later to have put in position
gives results a lot of variables, and the tests were not of a lot
value.

The mortar stops among mark of water stop and low of the arctic one
Ocean to Vardo suffered of the worse one, and only those did with the
stronger mixture of cement, 1 to 1 withstood the severe cold
experimented. The best results were gotten when the mortar was
only made compact, as such mixture it allowed diffusion to take
so slowly puts that its effect was negligible;  but when, on
the other hand, the mortar was loose, the salts quickly
penetrated inside the mass, where you change chemical
success, and it caused him/it to disintegrate. The concrete stops
done with 1 to 3 mortar disintegrated in almost every case,
while the strongest remained in enough good condition. The
the best results were given by concrete that it contains an excess of
very excellent sand. Mixing a lot of silica of the excellently-earth or trass,
with the cement an advantage tried where a weak mixture was
employee, but in the other cases any benefit was observed.

The association in Portland Cemento German Manufacturers it brought
out a series of tests, extending more than ten years to them,