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Modification with polymer enhances the low and high temperature properties of asphalt cement and surface treatments constructed with polymer-modified binders are claimed to provide better initial and long term aggregate retention, increased resistance to flushing and longer surface treatment life. Eight surface treatments were placed using polymer-modified high float emulsion in Northern and Northwestern Regions in 1987 as part of the routine construction and maintenance surface treatment programs. Special criteria were not used when selecting the locations. Styrelf HF-150P emulsified asphalt was used on all the 1987 trials to determine if polymer-modified high float emulsions could be used under normal construction procedures and to monitor the claims of improved performance. The control sections were built with standard HF-150S emulsified asphalt next to the trial sections. The trial and the control sections will be monitored for performance annually.
"ASTM Publication Code Number (PCN) 04-011080-08. - "Sponsored by ASTM Committee D-4 on Road and Paving Materials."-- Foreword. - Includes bibliographical references and indexes. - Electronic reproduction; W. Conshohocken, Pa; ASTM International; 2011; Mode of access: World Wide Web; System requirements: Web browser; Access may be restricted to users at subscribing institutions.
Introductory technical guidance for civil engineers, highway engineers and construction managers interested in surface rehabilitation of asphalt concrete pavements for streets and highways. Here is what is discussed: 1. INTRODUCTION, 2. OBJECTIVES & SCOPE, 3. TYPES OF SURFACE REHABILITATION TECHNIQUES, 4. SUMMARY.
The proliferation of technological capability, miniaturization, and demand for aerial intelligence is pushing unmanned aerial systems (UAS) into the realm of a multi-billion dollar industry. This book surveys the UAS landscape from history to future applications. It discusses commercial applications, integration into the national airspace system (NAS), System function, operational procedures, safety concerns, and a host of other relevant topics. The book is dynamic and well-illustrated with separate sections for terminology and web- based resources for further information.
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 411: Microsurfacing explores highway microsurfacing project selection, design, contracting, equipment, construction, and performance measurement processes used by transportation agencies in the United States and Canada. Microsurfacing is a polymer-modified cold-mix surface treatment that has the potential to address a broad range of problems on today's highways --