Evaluation of Preformed Neoprene Joint Seals, HR-318, 1994

(1994) Evaluation of Preformed Neoprene Joint Seals, HR-318, 1994. Transportation, Department of


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Most pavement contraction joint seals in Iowa, in general, have been performing in less than a satisfactory manner. The effective life of the seals, in maintaining a watertight joint, has been only from two to five years. In search of improvements, research was proposed to evaluate preformed neoprene joint seals. The performance of those seals was to be compared mainly with the hot poured rubberized asphalt sealants and cold applied silicone sealants or other sealants commonly used at the time this research began. Joint designs and methods of sawing were also investigated. All evaluations were done in new portland cement concrete (PCC) pavements. Three projects were initially selected and each included a research section of joint sealing. Some additional sites were later added for evaluation. Several joint sealants were evaluated at each research site. The various sites included high, medium and low levels of traffic. Evaluations were done over a five-year period. Neoprene joint seals provided better performance than hot or cold field formed joints.

Item Type: Departmental Report
Keywords: Contraction joints, Design, Durability, Joint sealers, Neoprene, Performance evaluations, Preforming, Rubberized bitumen, Sawing, Sealing compounds, Seals (Devices), Silicones, Compression seals
Subjects: Transportation
Transportation > Roads and highways
Transportation > Design and Construction
ID Code: 16260
Deposited By: Iowa DOT Library
Deposited On: 06 Mar 2014 19:23
Last Modified: 03 Oct 2014 12:29
URI: https://publications.iowa.gov/id/eprint/16260