In New Jersey, urban high-rises with sidewalk frontage and suburban HOAs containing walking paths, parking lots, and service roads are reliant on their paved surfaces and therefore need to regularly inspect and maintain their concrete.
While the terms cement and concrete are often thrown around as being interchangeable, cement is actually an ingredient of concrete.
“Concrete is a mixture of white sands, large aggregates and cements. All three of them comprised together make concrete,” says paving specialist Mario Sciacca of Etna Contracting in Red Hook, Brooklyn who has worked extensively throughout Fort Lee. “So when people refer to cement work, that’s wrong; it’s concrete work.”
Good concrete can be obtained by using a wide variety of mix proportions if proper mix design procedures are used. A good general rule to use is the rule of 6’s: A minimum cement content of 6 bags per cubic yard of concrete, a maximum water content of 6 gallons per bag of cement, a curing period (keeping concrete moist) a minimum of 6 days, and an air content of 6 percent (if concrete will be subject to freezing and thawing).
There is a wide variety of concrete mixes used throughout the New Jersey area, according to Glenn Zuhl, president of the condo division of Quality 1st Contracting in Perth Amboy. “Typically, most poured concrete foundations have a compressive strength of 3,500 to 4,000 psi, which stands for pounds per square inch.”