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原文传递 USE OF HYDRODEMOLITION TO REMOVE DETERIORATED CONCRETE FROM BRIDGE DECKS.

题名：	USE OF HYDRODEMOLITION TO REMOVE DETERIORATED CONCRETE FROM BRIDGE DECKS.
作者：	Lohrey-EC
关键词：	CONCRETE-BRIDGE-DECKS; REHABILITATION-; HYDRODEMOLITION-; BENEFITS-; EQUIPMENT-
摘要：	Hydrodemolition is a relatively new method of removing select portions of a hardened concrete structure. By using the erosive power of high-velocity water streams, hydrodemolition equipment breaks up concrete by disintegrating the cement matrix between aggregates. The demolishing effect can be tightly controlled to a desired level of removal, ranging from light scarification of the surface to deep penetration of the structural element. The use of the hydrodemolition process has several advantages over conventional concrete removal methods, such as jackhammering. These advantages include a reduction in new damage caused by the removal process; automation, which produces a very consistent level of removal energy over large areas; the ability to seek out and remove weak or deteriorated locations at various depths; and a rough, high-quality bonding surface for repair materials. These characteristics are favorable for construction projects that involve rehabilitation of corrosion-damaged reinforced concrete structures, particularly bridge decks. Details of the hydrodemolition process, equipment operating parameters, and incidental requirements are provided. In addition, appropriate structural conditions that favor the use of hydrodemolition and various methods of specifying work items related to bridge deck rehabilitation are described. The need for comprehensive field evaluations of concrete structures before rehabilitation strategies are developed was found during the course of the work.
总页数：	Transportation Research Record. 1995. (1490) pp83-89 (3 Phot., 1 Tab., 6 Ref.)
报告类型：	科技报告