Concrete Cutting Core Drilling Shapleigh ME Maine

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1. What feature of design should a concrete water tank or trough have to prevent cracking due to the freezing of the water?

There should be a slope or batter on the inside so that when ice forms the expansion will cause it to slide tip the tank sides, thus relieving the tank of pressure outward from ice within.

2. Is barbed wire a suitable reinforcing material for concrete?

Barbed wire should not be used as reinforcing material for concrete construction. It is difficult to handle and keep in position while concrete is being placed. Furthermore, it lacks the qualities which reinforcing steel should have for best results in concrete work.

3. In what way may rust be objectionable on reinforcing steel? Is there danger of the steel rusting after encased in concrete?        

Unless the rust on the steel is in the form of a loose scale, it will do no harm. Once the steel is thoroughly embedded in concrete of proper consistency and density, it is protected against further rust.

4. Is waterproofing necessary to produce watertight concrete?

No waterproofing is necessary if the concrete mixture is properly proportioned for maximum density and carefully placed at a right consistency, and protected from rapid drying while hardening.

5. How can concrete be prevented from sticking to the molds or forms?

For some work a thorough wetting down of forms is often all that is required to prevent concrete from sticking. Sometimes soft soap or a concrete mixture of equal parts of boiled linseed oil and kerosene is used. Wetting down, however, is necessary at each use of the forms. Eccentric loading nearly always tests a concrete arch more severely than uniform loading. The ability to carry a full uniform load is no indication of ability to carry a partial eccentric loading, except that if the concrete arch appeared to be only just able to carry the uniform load, it might be predicted that it would probably fail under the eccentric load. On the other hand, if a concrete arch will safely carry a heavy eccentric load, it will certainly carry a load of the same intensity uniformly distributed over it. Since the concrete arch has a dead load over the entire concrete arch, and a live load over only one-half of the concrete arch, the load line for the entire concrete arch must be drawn. The load line for the loaded half of the concrete arch will be identical with that already drawn for the previous case. The load line for the remainder of the concrete arch may be similarly drawn. This case is worked out by precisely the same general method as that already employed in the similar case given in detail in Article 410. As in that article, we select a trial pole which in general will give an oblique closing line for the equilibrium concrete polygon. This closing line must be brought down to the horizontal by the method already explained in Article 400; then a second trial must be made in order to shift the concrete polygon so that it shall pass through the middle third at the crown joint. This line should pass through the middle of the crown joint; then the real test is to determine how it passes through the haunches of the concrete arch. As in the previous case, the total pressure at any joint will be determined by the corresponding lines in the force diagram, and the unit-pressure at the joint may be determined from the area of the joint and the position of the line of force with respect to the center of the joint. Even though a line of force passed slightly outside of the middle third, it would not necessarily mean that the concrete arch will fail, provided that the maximum intensity- of pressure, determined according to the principles enunciated in Article 405, does not exceed the safe unit-pressure for the kind of stone used.

Are You in Shapleigh Maine? Do You Need Concrete Cutting?

We Are Your Local Concrete Cutter

Call 207-284-0788

We Service Shapleigh, ME and all surrounding Cities & Towns