Question

What is the purpose of asphalt, concrete expansion joint sealant?

1) To fill gaps between asphalt and concrete surfaces
2) To seal cracks in asphalt and concrete
3) To provide a smooth transition between different surfaces
4) To prevent water infiltration and damage

Answer 1

The main purpose of asphalt, concrete expansion joint sealant is to prevent water infiltration and protect against damage due to the expansion and contraction of these materials.

Step-by-step explanation:

The purpose of asphalt, concrete expansion joint sealant is primarily to prevent water infiltration and subsequent damage that can occur from the expansion and contraction of these materials. When these materials are exposed to varying temperatures and weather conditions, they can expand and contract. The sealant fills the space in the expansion joints to allow for this movement while also providing a barrier to water and debris, which can cause further damage such as cracking or erosion of the base material. While the sealant can indeed be used to fill gaps, seal cracks, and provide a smooth transition between surfaces, its essential function is to maintain the integrity of the surface by preventing water infiltration, which can lead to costly repairs if left unaddressed.