Exam 11: Pricing Concrete Work

The factor that, perhaps, has the most influence on the cost of placing concrete is the method used to convey the concrete from the mixing trucks to its final location.

The most economical method of placing concrete is to _________.

The cost of supplying concrete to a site includes the cost of cement, sand, aggregate, water, and equipment to mix and transport the concrete.

Most contractors tend to use the same screed system on all their jobs so the estimator may be able to obtain cost information from a previous job and use it to price the next job.

Concrete cannot be placed using the crane and bucket setup.

____ for cast-in-place concrete may be constructed of lumber, plywood, aluminum, steel, and combinations of these materials.

The use of concrete buggies has increased significantly in recent years.

An allowance for waste and spillage of concrete is added as a waste factor to concrete takeoff quantities.

Chutes over ____ feet long can be harmful to the concrete mix by causing segregation of concrete constituents.

Buggies require a small number of personnel to operate them in order to maintain reasonable production rates in terms of cubic yards placed per hour.

The most time-consuming activity involved in setting up a form system is usually the placing and adjusting of ____.

The "____" is the area of the form system that will be in contact with the concrete.

Where a central tower crane is not in place on a site, using ______ to place concrete is usually the most economical alternative. ​

The cost of materials used in a formwork system would include the rental or purchase cost of all the components involved in its construction, including form ties and other hardware items.

Form hardware is often computed at a rate of between ____ of the total value of formwork material included in the estimate.

____ has randomly distributed fibers incorporated into the concrete mix with the object of improving the tensile strength of the concrete and increasing the concrete's ability to resist cracking and deformation.

The need for a multitude of calculations of form materials prices can be entirely avoided by using a(n)"____" for all form materials required on a project.

The value of waste factors usually lies between 1% and ____% for concrete placed in formwork.

Reinforcing steel for concrete includes ____ and reinforcing bars.

____ additives to concrete are used to maintain a low water/cement ratio in a concrete mix for maximum strength.