HAPI celebrates National Public Works Week in Hawaii

“Public Works Always There” is the theme of this year’s National Public Works Week – from May 15 to 21.

This theme fits perfectly with HAPI, since roads are public works and asphalt roads are everywhere. HAPI and our members work to keep roads smooth and drivable.

To celebrate the week, APWA Hawaii will have exhibits on display at Kahala Mall, featuring Transit Oriented Development (TOD), Bike Share Hawaii, Stormwater Quality, Complete Streets, and HAPI’s exhibit “The Life Cycle of a Road”.

HAPI thanks APWA Hawaii for inviting us to be a part of their exhibition.

HAPI’s exhibit – “The Life Cycle of a Road”
(Please see below the photos for the complete text shown on the exhibit.)

lifecycle final

Photos from the APWA Hawaii Exhibition at Kahala Mall

Aggregate is a collective term for sand, gravel and crushed stone mineral materials in their natural or processed state. By weight, aggregate generally accounts for between 92-96% of the asphalt pavement structure. A quarry (pictured) is the major source of aggregate in Hawai‘i.

The Kalaeloa Asphalt Terminal was designed to facilitate the importation and distribution of liquid asphalt for the Hawaiian Islands. In this role, the terminal needed to be able to accept ship-sized cargos into storage and be able to provide longer term storage, as well as accommodate the loading of trucks and
bulk containers for distribution of the asphalt throughout the islands.

Asphalt pavement consists of asphalt, aggregate, and air. It is produced in a plant that proportions, blends, and heats aggregate and asphalt to temperatures typically between 300-350° F. By weight asphalt pavement is between 92-96% aggregate and 4-8% asphalt.

Asphalt pavement is placed on a prepared surface at the desired thickness by an asphalt paver machine and is then compacted by compacting equipment. Compaction is the greatest determining factor in pavement performance; a properly compacted road is long lasting.

Newly Paved Roads are smooth roads and that’s what drivers want today. Not just for peace and quiet, but also for peace of mind. With asphalt, it is easy to ensure a consistently smooth level of performance which saves wear and tear on your vehicle and can improve vehicle fuel economy.

The two pavement treatments used in Hawai‘i are seal coat and slurry seal. Slurry seal is a mixture of aggregate, emulsified asphalt, fillers, additives and water. Seal coat treatment is a mixture of uniformly blended asphalt emulsions. Both treatments minimize oxidation/ aging, reduces water infiltration, and improves aesthetics.

Asphalt pavements are America’s most recycled material. When an asphalt pavement is maintained, the in place material removed from the site becomes part of the raw materials for new pavement layers. Reclaimed asphalt pavements (RAP) perform as well as or better than virgin mixes. In 2014, 72 million tons of asphalt pavement material in the USA was reclaimed, and nearly 100% was reused.


The Hawaii Asphalt Paving Industry (HAPI) represents asphalt pavement producers, laydown contractors, and design consultants in the State of Hawai‘i as well as industries related to pavement preservation. Formed in 1989, HAPI’s purpose is to provide engineering promotion and education to advance the continuing use of asphalt pavement and pavement treatments throughout Hawai‘i.

HAPI members design and construct pavement improvement projects including highways, roads, airfields, harbors, play courts, parking lots, athletic fields, and race tracks. We also provide pavement preservation treatments such as mill and fill, crack fill and seal, seal coat, chip seal and slurry seal. Our clients include County, State and Federal government agencies, the military and private land owners and developers.

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Hawaii Asphalt Paving Industry
1287 Kalani Street, Suite 202
Honolulu, HI 96817
Tel: 808.847.HAPI (4274)
Email: jon@hawaiiasphalt.org
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