The surface course (typically an HMA layer) is the stiffest (as measured by resilient modulus) and contributes the most to pavement strength. The underlying layers are less stiff but are still important to pavement strength as well as drainage and frost protection.

2025年2月3日 · Hot Mix Asphalt (HMA) is one of the most popular materials for paving roads, highways, parking lots, and driveways. As the name suggests, it’s a mixture of aggregates (such as sand, gravel, and crushed stone) combined with a binder known as bitumen. This mix is heated to high temperatures to bind the components together robustly.

2021年11月8日 · Hot mix asphalt, commonly referred to as HMA, bitumen, or blacktop, is the most widely used type of asphalt in major paving projects. There are a few different types of HMA, each of which has unique performance properties and ideal usage applications.

Stone matrix asphalt (SMA), sometimes called stone mastic asphalt, is a gap-graded HMA originally developed in Europe to maximize rutting resistance and durability. The mix design goal is to create stone-on-stone contact within the mixture.

Rubblization is a proven construction technique that turns a deteriorated concrete road into the base for a smooth, safe, quiet, durable pavement constructed of Hot Mix Asphalt (HMA). It minimizes delays for motorists and allows for construction during "off-peak" hours.

Hot-mix asphalt, or HMA, is a widely used material in road construction and pavement projects. It is the most common type of asphalt mix used for highways, parking lots, and various other applications where long-term durability is the main priority.

HMA vs. WMA The key difference between HMA and WMA is the temperature at which the pavement is produced. HMA is typically produced between 275-350°F while WMA can be produced 100 degrees lower. This can be achieved by a “foaming” process which happens by strategically adding water which turns to steam, causing the binder to expand into foam.

2023年6月28日 · As the most popular choice for paving residential roads and parking lots, hot mix asphalt (HMA) is the workhorse of the paving industry. But what exactly is HMA, and how does its composition impact its function?

HMA mix design is the process of determining what aggregate to use, what asphalt binder to use and what the optimum combination of these two ingredients ought to be. In order to meet the demands placed by the preceding desirable HMA properties, all mix design processes involve three basic steps:

2020年3月20日 · HMA consists of a mixture of asphalt binder and a graded aggregate ranging from coarse to very fine particles. HMA is classified by type depending on the specified aggregate gradation and mix design criteria appropriate for the project conditions.