Concrete Cutting Cutter Lancaster MA Mass Massachusetts
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Lancaster
Massachusetts Concrete Cutting and Core Drilling
An
essential to thorough mixing is a flat water-tight platform, a convenient size
being about 10 feet square, the boards forming which must be laid-with tight
joints to prevent the cement and water from running through while mixing. If
these boards are planed off on top it will make the shoveling easier. The
operation of mixing the materials for concrete is as follows: Measure the sand
and spread it in a layer of even depth as shown in Fig. 7. Place the cement on
top of the sand. First turn these two materials toward the center of the board
and then turn them twice more or until they are thoroughly mixed together, as
indicated by a uniform color. Next wet the stone, throw it on top of the mixed
cement and sand and turn the whole mass at least three times, water being
slowly poured on during the first turning, the quantity varying according to
the nature of the work. In general, add sufficient water to give a
"mushy" mixture just too soft to bear the weight of a man when in
place. Pails are most convenient for measuring the water, and enough pails
should be provided in advance for wetting an entire batch. Do not use a hose.
In turning the concrete use square-pointed shovels. Push the shovel along the
boards under the mass; lift it, then turning the shovel carefully over deposit
the material with a spreading motion. Concrete mixing machines should be used on
large jobs as a matter of economy.
Place the concrete in forms in layers about
6 to 12 inches deep and tamp lightly with a rammer or puddle with a piece of FORMS
2 by 4-inch joint until the water flushes to the top. Note that the concrete
must be well rammed and spaded to avoid pockets of stone forming in the
concrete. The method of obtaining a smooth face on concrete frequently adopted
is as follows: Thrust a spade or thin paddle between the concrete and the form,
moving the handle to and fro, up and down. This movement forces the broken
stone in the concrete away and brings a coating of mortar next to the form,
which gives a smooth surface. Care taken in. manipulation of concrete along the
moulds will be amply repaid by the smooth surface resulting, and the saving in
time and expense otherwise made necessary in plastering over cavities and
smoothing rough places. Concrete which is exposed to the sun should be soaked
with water each day for a week or two. This will allow the interior of the
walls to dry uniformly with the exterior, and thus prevent scaling or cracking.
Concrete should never be placed under water if it possibly can be avoided,
because the materials are in danger of separating. The danger of the fine
material separating from the course was illustrated in a little test made by
the engineers constructing the Holyoke Dam. A small batch of concrete was mixed
in proportions one part cement to two and one- quarter parts sand to five parts
stone, and shoveled into a pail of water with a trowel. The surface hardened
satisfactorily, and after several months the water was poured off and the
material taken out. Instead of being concrete, three layers were found. On top
was a thin layer of practically neat cement, then about 2 or 3 inches of mixed
sand and cement in a porous mortar, then below this a mixture of sand and stone
as separate and clean as before the concrete was mixed.
This experiment and
other tests show that if concrete has to be placed under water it must be
deposited in large masses and never by shovelfuls. On small work put the
concrete in pails, place a board over the top of the pail and lower it
carefully into the water to the bottom. Turn the pail upside down, carefully
remove the board and slowly raise the pail, allowing the concrete to flow out.
Great care must be used neither to disturb the water in which the concrete is
being placed nor to touch the green concrete.
Are You in Lancaster Massachusetts? Do You
Need Concrete Cutting?
Call 800-799-9151
We Service Lancaster
MA and all surrounding Cities & Towns
| Concrete Cutting Lancaster MA |
Concrete Cutting Lancaster Massachusetts |
| Concrete Cutter Lancaster MA |
Concrete Cutter Lancaster Massachusetts |
| Concrete Coring Lancaster MA |
Concrete Coring Lancaster Massachusetts |
| Core Drilling Lancaster MA |
Core Drilling Lancaster Massachusetts |
| Concrete Sawing Lancaster MA |
Concrete Sawing |
| Concrete Cutting MA |
Concrete Sawing Lancaster Mass |
| Concrete Cutting Lancaster Mass |
Concrete Cutting Lancaster Massachusetts |
| Concrete Cutter Lancaster Mass |
Concrete Coring Mass |
| Core Driller Lancaster MA |
Core Drilling Lancaster Mass |
Lancaster
Massachusetts Concrete Cutting and Core Drilling
