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A procedure for determining the test maximum density of asphalt concrete in a field laboratory was developed and then tried on several paving projects. This test maximum density is required to determine the in-situ relative compaction of asphalt concrete per California Test 375. The procedure involves the use of a hydraulic jack to apply a 133,500 N static load for compaction in lieu of using a kneading compactor. Although the test maximum densities achieved by this static loading are normally lower than the values determined using a kneading compactor, a correlation factor can be determined and applied. In most cases, the test results can be available within two hours of obtaining a sample of the material.
Research was conducted to determine the state of the art in the development, need, and use of rapid test methods. The first phase comprises a literature survey of current practices in quality control and acceptance testing, along with a study using statistical methods to assess the time limits for rapid tests. The second phase is concerned with the development and evaluation of new rapid test methods or principles to select those worthy of further investigation. thirty-eight state highway departments participated in the study, and interviews were conducted when appropriate. The second phase of the study applied to rapid test methods for asphalt content determination, compaction control, gradation of several types of aggregate, density of base course materials and soils, and moisture content. The results of all tests are appended.
Introductory technical guidance for civil engineers and construction managers interested in asphalt concrete pavement for streets, highways, airport runways and other infrastructure. Here is what is discussed: 1. FLEXIBLE PAVEMENT 2. HOT MIX ASPHALT PAVEMENT 3. ASPHALT CONCRETE RECYCLING 4. MISCELLANEOUS HOT MIX PROCESSES 5. SPRAY AND SURFACE APPLICATIONS 6. PAVEMENT DESIGN IN SEASONAL FROST CONDITIONS 7. PAVEMENT MAINTENANCE MANAGEMENT 8. PAVEMENT OVERLAYS 9. SOIL STABILIZATION.
Modern highway engineering reflects an integrated view of a road system's entire lifecycle, including any potential environmental impacts, and seeks to develop a sustainable infrastructure through careful planning and active management. This trend is not limited to developed nations, but is recognized across the globe. Edited by renowned authority