Boston Concrete Cutting
288 Grove Street, Unit 110
Braintree, MA 02184


781-519-2456
info@bostonconcretecutting.com
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Concrete Cutting Sawing Plymton MA Mass Massachusetts

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“We Specialize in Cutting Doorways and Windows in Concrete Foundations”

Are You in Plymton Massachusetts? Do You Need Concrete Cutting?

We Are Your Local Concrete Cutter

Call 781-519-2456

We Service Plymton MA and all surrounding Cities & Towns

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A small hoisting engine was also used for hoisting the steel and lumber used for concrete forms; as this engine was located some distance froth the rest of the plant, it is not shown in Fig. 147. The three engines are supplied with steam from a portable boiler which is located as shown in the figure. The efficiency of this plant was shown in the mixing and hoisting of the concrete for the second floor, when 240 cubic yards were mixed and hoisted in 16 hours or at an average rate of one cubic yard in four. All materials were delivered at the front of the building; and therefore it was necessary to dozer transport the cement, sand, and stone about 100 feet to the concrete mixer. This was done by means of wheel made for Moore & Company, Inc., the capacity being four cubic feet. The concrete was a 1: 2: 4 mixes, and was mixed in concrete batches of 14 cubic feet. The materials for a concrete batch, therefore, consisted of 2 bags of cement, 1 wheelbarrow of sand, and 2 wheelbarrows of stone. The lumber for the concrete forms was 1-inch plank, except the support and braces. Details of the concrete forms will be given and discussed under the heading of "Concrete forms." A self-propelling mixing and spreading machine has been found very desirable for laying concrete base for street pavements.

Fig. 148 illustrates a plant of this kind,-which has been devised by the Municipal Engineering & Contracting Company. One of these machines was very successfully used in Buffalo, N.Y., in 1907. The concrete mixer is of the improved cube type, mounted on a heavy truck frame. The concrete is discharged into a specially designed bucket, which receives the whole concrete batch and travels to the rear on a truck which is about 25 feet long. The head of the truck is supported by guys, and also by a pair of small wheels near the middle of the truck, which rest on the graded surface of the street. The truck or boom is pivoted at the end connected to the main truck, and has a horizontal swing of about 170 degrees, so that a street 50 feet wide is covered. An inclined track is also constructed, on which a bucket is operated for elevating and charging the concrete mixer. The bucket is loaded while resting on the ground, with the proper ingredients for a concrete batch, from the materials that have been distributed in concrete piles along the street. The bucket is then pulled up the in- dine, and the contents dumped into the concrete mixer. An automatic water- measuring supply tank mounted on the upper part of the frame insures a uniform amount of water for each concrete batch mixed. The power for hoisting, mixing, and distributing the concrete, and propelling the machine, was furnished by a 16-horse-power gasoline engine of the automobile type.

The machine can be moved backward as well as forward, and is supplied with complete steering gear. The capacity per charge of the concrete mixer and charging and distributing buckets used at Buffalo, was 11 cubic feet. The crew consisted of 16 men and a foreman, and they mixed and laid from 110 to 120 cubic yards per hour. Their best record was 1,000 cubic yards in an eight-hour day. The thickness of the concrete base laid was 6 inches. There are two general types of hollow concrete block machines on the market those with a vertical face and those with a horizontal face. In making blocks with the vertical-faced machine, the face of the block is in a vertical position when molded and is simply lifted from the machine on its base-plate. The horizontal-faced (or face-down) block is made with the face down, the concrete face-plate forming the bottom of the mould. The cores are withdrawn horizontally, or the mould is turned over and the core is taken out vertically; the block is then ready for removal. The principal difference in the two types of machine is that, if it is desired to put a special facing on the block, it is more convenient to do it with a horizontal-faced machine.

Are You in Plymton Massachusetts? Do You Need Concrete Cutting?

We Are Your Local Concrete Cutter

Call 781-519-2456

We Service Plymton MA and all surrounding Cities & Towns

Boston Concrete Cutting | 288 Grove Street, Unit 110, Braintree, MA 02184 | 781-519-2456 | info@bostonconcretecutting.com