Use this SimpleSpecs™ master specification to specify asphalt paving – hot-mix asphaltic paving. Base course may be crushed stone or gravel or hot-mix asphaltic concrete.
Asphalt paving is a mixture of asphalt, crushed aggregates, and bitumen. The asphalt mixture is deposited over a base layer of crushed rock or a coarser layer of asphaltic concrete and then rolled out to form a relatively smooth surface.
Hot-mix asphalt (HMA) concrete is produced by heating the asphalt binder to decrease its viscosity, and drying the aggregate to remove moisture from it prior to mixing. Mixing is generally performed with the aggregate at about 300 °F (or roughly 150 °C) for virgin asphalt and 330 °F (166 °C) for polymer modified asphalt, and the asphalt cement at 200 °F (95 °C).
In many countries paving is restricted to the summer months because in winter the compacted base will lower the temperature of the asphalt and prevent the proper packing of the asphalt to the required density. So keep in mind that the paving and compaction must be performed while the asphalt is sufficiently hot.
HMA is the form of asphalt concrete most commonly used on high traffic pavements such as those on major highways, racetracks, and airfields. It is also used as an environmental liner for landfills, reservoirs, and fish hatchery ponds.
Asphalt deterioration can include crocodile cracking, potholes, upheaval, raveling, bleeding, rutting, shoving, stripping, and grade depressions. In cold climates, frost heaves can crack asphalt even in one winter. Filling the cracks with bitumen is a temporary fix, but only proper compaction and drainage can slow this process.
Factors that cause asphalt concrete to deteriorate over time mostly fall into one of three categories: construction quality, environmental considerations, and traffic loads. Often, damage results from combinations of factors in all three categories.
To learn more about Asphalt, visit Wikipedia.
Related SimpleSpecs™ master specification:
The SimpleSpecs™ master specs concept
Design professionals are accustomed to seeing lengthy project specifications, so why is SimpleSpecs™ so short?
Specifications have grown evermore wordy over the years for several reasons:
The mistaken belief that specifications must be lengthy and legal-sounding to be enforceable. In fact, quite the opposite is true. Having shorter, easily understood specifications makes us less likely to have problems in the field.
A belief that having lots of words protects us from a Contactor making mistakes. There is no way to include enough statements to protect yourself from a bad contractor, regardless of the length of your specification.
Our desire to be in control of the project by specifying means and methods instead of including simple, enforceable statements.
Easier to Edit
SimpleSpecs™ is written as a series of Microsoft word files that include statements that affect construction costs or overall quality and are far simpler to edit than other master specification systems.
Each SimpleSpecs™ specification section is non-proprietary and includes three manufacturers that meet the specified reference standards, descriptive, or performance-based requirements. They are written to allow any listed manufacturers to provide the specified products.
Hidden Guide Text
Each SimpleSpecs™ specification section includes hidden text to inform and guide users in editing the specifications to suit project conditions.
SimpleSpecs™ sections are edited using pre-defined options that are contained in [brackets] or by selecting optional text separated by "OR" statements. Paragraph and page numbering are included as automatic codes, eliminating the need to renumber when revisions are made manually. Global changes to headers, footer, terms, font colors and phrases are easily updated using a third-party search and replace software, available through ZeroDocs.com.