Portuguese 
English 
Spanish 
2 min of reading 
0 comments 
Discover How Asphalt Used for Streets and Highways in Brazil Is Made and Understand the Difference Between Hot and Cold Types
Asphalt is present everywhere, on avenues and highways, but few know how asphalt is made.
According to the CNT Highway Research 2024, Brazil has a road network of approximately 1.7 million kilometers, of which only 12.4% are paved, which corresponds to about 213.5 thousand kilometers.
This means that about 87.6% of the roads in the country remain unpaved. In light of this, knowing how asphalt is made helps to understand this dark and durable layer that covers highways and streets.
-
The government opens the vault and deposits R$ 2.6 billion for the construction of Brazil’s first underwater tunnel, with a length of 1.5 km, 870 m under the sea, a total project cost of R$ 6.8 billion, and a 30-year concession.
-
Only 46 meters remain for Brazil and Paraguay to connect via the Bioceanic Route bridge, the project that will link the Atlantic to the Pacific by land and change the logistical map of four countries in South America.
-
The bridge that holds the largest stone railway arch in the world: built over 100 years ago, destroyed in the war, and rebuilt to continue operating to this day, it still carries trains over the Soča River in Slovenia.
-
Italian giant of 130 tons arrives at the Senna Tower construction site and accelerates foundations: Mite CFA 3436 drills up to 50 m, 750 hp engine, investment of R$ 20 million, unique in Latin America.
Next, see how asphalt is made and what its main types are.
Two Main Types
The first important point is to understand that there are two main types of asphalt: hot and cold. Both have similar compositions, but each has specific characteristics and uses.
Hot asphalt is the most common and widely used in paving projects. Cold asphalt, on the other hand, stands out for being more practical for transport and application.
Production of Hot Asphalt
Hot asphalt is produced in plants, where Asphaltic Petroleum Cement (CAP) is mixed with aggregate materials, such as gravel. The CAP is a material obtained from the distillation of petroleum. Among the types used is CAP 50/70.
This mixture is heated to high temperatures and then applied directly to the ground. Next, compaction is done using equipment known as a compactor, which can be flat or tire-operated.
This process ensures firmness and durability of the asphalt layer.
How Cold Asphalt Works
Cold asphalt is a modified version of hot asphalt. It receives chemical additives that slow down the curing (hardening) process.
This means it can be stored and transported for a longer time without the need for immediate application.
This type of asphalt allows for stocking and application anywhere, regardless of the distance to the plant.
It can also be used in different climates and temperatures, even on rainy days.
Another advantage is the possibility of quick and on-demand use, making it ideal for small maintenance and emergency repairs.
Knowing how asphalt is made helps to appreciate this material that transforms transportation, reduces logistical costs, and improves road quality.
Seja o primeiro a reagir!