Concrete Cutting Cutter Devens MA Mass Massachusetts

Concrete Cutting Devens Massachusetts

Concrete Cutting Cutter Devens MA Mass Massachusetts

Welcome to AffordableConcreteCutting.Com

�We Specialize in Cutting Doorways and Windows in Concrete Foundations�

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

We Are Your Local Concrete Cutter

Call 800-799-9151

We Service Devens MA and all surrounding Cities & Towns

�No Travel Charges � Ever! Guaranteed!�

Concrete Cutting Devens MA �� Concrete Cutting Devens Massachusetts

Concrete Cutter Devens MA�� Concrete Cutter Devens Massachusetts

Concrete Coring Devens MA �� Concrete Coring Devens Massachusetts

Core Drilling Devens MA�� Core Drilling Devens Massachusetts

Concrete Sawing Devens MA�� Concrete Sawing

Concrete Cutting MA �� Concrete Sawing Devens Mass

Concrete Cutting Devens Mass �� Concrete Cutting Devens Massachusetts��

Concrete Cutter Devens Mass�� Concrete Coring Mass��

Core Driller Devens MA�� Core Drilling Devens Mass��

Devens Massachusetts Concrete Cutting and Core Drilling

Steel increases in volume when it corrodes and cracks or splits off the concrete covering with consequent increase in the rate of destruction. If the steel is embedded a sufficient distance in concrete of good quality, as provided by the usual rules, it is secure against corrosion. For structural members in sea water, the reinforcement is required by the Joint Committee to be at least 3 inches from the surface except at corners where 4 inches is prescribed. Somewhat less protection is required for alkali exposure. For ordinary construction the Joint Committee specifies:

"Metal reinforcement in wall footings and column footings shall have a minimum covering of 3 in. of concrete. At surfaces of concrete exposed to the weather, metal reinforcement shall be protected by not less than 2 in. of concrete.

Concrete is often used where it is exposed to the action of oils, of sewage or of various chemicals. The effect of all such liquids must be carefully considered and suitable protective measures adopted when needed. Concrete made from most of the usual types of aggregates is an excellent fire-resistive and fireproofing material, the rate of thermal conductivity being so low that properly covered steel is thoroughly protected. A certain amount of spalling and surface calcinations is inevitable in a severe fire but properly made with proper materials a reinforced concrete structure should stand an ordinary fire without material structural damage. For fireproofing cover the Joint Committee specifies: Metal reinforcement in fire-resistive construction shall be protected by not less than 1 in of concrete in slabs and walls, and not less than 2 in. in beams, girders, and columns, provided aggregate showing an expansion not materially greater than that of limestone or trap-rock is used; when impracticable to obtain aggregate of this grade the protective covering shall be 1 in. thicker and shall be reinforced with metal mesh, having openings not exceeding 3 in., placed 1 in. from the finished surface." "In structures where the fire hazard is limited, the metal reinforcement shall not be placed nearer the exposed surface than 4 in. in slabs and walls, or 14 in. in beams, girders, and columns." It should be noted that common practice is that indicated by the second paragraph quoted. The corrosion of steel reinforcement by electrolytic action occasionally takes place but in general no special precautions need to be taken on this account.' It is worthy of note that the use of salt in the mixing water increases the conductivity of concrete and enormously increases electrolytic action when it takes place. Stray electric currents are rarely a source of trouble except in structures in contact with sea water. Another source of damage to concrete is the percolation of water. Accordingly means should be taken to prevent this by proper drainage and waterproofing, being careful to avoid any arrangement that permits accumulation of water. It is perfectly possible to make concrete water-tight up to heads of 70 feet or more provided cracks do not develop due to stress, temperature or to the opening up of construction joints. Structures below ground are relatively little affected by temperature but those exposed to the weather are very likely to develop leaks through construction joints no matter how well these joints are made. Continuous metal dams across such joints are probably the best means for minimizing this difficulty. Stress cracks can be lessened by reducing the stresses. In reinforcing water-tight work it is particularly important that steel be used wherever bending would tend to cause tension and hence cracks, whether the steel is needed for stability or not.