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原文传递 JOINT SEAL PRACTICES IN THE UNITED STATES: OBSERVATIONS AND CONSIDERATIONS.

题名：	JOINT SEAL PRACTICES IN THE UNITED STATES: OBSERVATIONS AND CONSIDERATIONS.
作者：	Morian-DA; Stoffels-S
关键词：	Joint sealing; Quality control; Quality assurance; Sawing; Sealing compounds; Subgrade materials; Drainage; Climate
摘要：	In recent years, states have adopted a wide variety of joint sealing practices for jointed rigid pavements, based on local experience. Over time, the adoption of quality control/quality assurance practices has resulted in decreased inspection and attention that ensure compliance with good joint seal installation practices. At this time, several agencies have adopted or are considering a policy of providing for rigid pavement joints by using a single 3-mm (1/8-in.) saw cut. Agencies are either leaving this saw cut unfilled or filling it with hot-poured sealant, recognizing that it is not effectively sealed. This practice may prove acceptable where positive drainage features are naturally occurring (coarse-grained subgrade) or where climates are very hot and dry, resulting in minimal joint movement. Other agencies continue to use established joint-sealing practices with good pavement performance results. This approach continues to be a prudent one, particularly in wet climates with fine-grained subgrade materials. Here slab-support erosion has been shown to result in accelerated deterioration of jointed rigid pavements.
总页数：	Transportation Research Record. 1998. (1627) pp 7-12 (FIGS: 1 Fig. TABS: 3 Tab. REFS: 12 Ref.)
报告类型：	科技报告