Download or read book Crack and Concrete Deck Sealant Performance written by Karl Andrew Johnson and published by . This book was released on 2013 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Concrete Deck and Crack Sealers written by José Antonio Pincheira and published by . This book was released on 2005 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Layout of a Protocol for the Field Performance of Concrete Deck and Crack Sealants written by José Antonio Pincheira and published by . This book was released on 2009 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this project was to develop and layout a protocol for the long-term monitoring and assessment of the performance of concrete deck and crack sealants in the field. To accomplish this goal, a total of six bridge decks were chosen for study. The decks have ages that vary from 4 to 30 years old, are all in good condition, though some presented a variety of longitudinal, transverse and diagonal cracking. In each deck, test segments were laid out along one lane in four of the six bridges. Drill powder samples were extracted in each segment in order to determine the in-situ, near-surface chloride ion content of the deck. Laboratory analyses of the samples showed that the chloride ion content varied between 3.2 lb/cy for the younger decks (3 years old) and 20.8 lb/cy for the older decks (28 years old). Based on the recommendations of a previous laboratory investigation, a pool of the best performing deck and crack sealants were selected to be applied in the decks. In two bridges, deck segments were sealed with four deck sealants while one segment was left unsealed to be used as a control segment. Additionally, the cracks in each of these segments were sealed with five crack sealants. While two other decks were also scheduled for sealing as part of this phase of the project, they were not done because the required curing time for some of the products was longer than deemed acceptable by DOT crews for these high traffic bridges. It is recommended, however, that every effort be made to have these decks be sealed in the near future. The remaining two bridges had been sealed at the time of construction. While no specific information could be secured about the product used in these decks, the low chloride ion content in these decks suggested that the applied product has helped reduce the ingress of chloride ions. Therefore, it is recommended that these decks continue to be monitored over time. Based on the inspections and the data collected in the field, a protocol and schedule for the continuing monitoring of sealant performance is presented.
Download or read book Effectiveness and Relative Performance of Concrete Bridge Deck and Crack Sealants written by Melissa A. Dorshorst and published by . This book was released on 2005 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Roadware 10 Minute Concrete Mender for PCC Bridge Deck Crack Sealing written by Khader Abu Al-eis and published by . This book was released on 2004 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bridge Deck Concrete Sealers written by John D. Wenzlick and published by . This book was released on 2007 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last several years, MoDOT has experienced problems with excessive amounts of cracking on some new concrete bridge decks. This has led to various concrete sealers being used for sealing cracks as well as whole decks, instead of applying linseed oil. Linseed oil is the only concrete sealer listed in Missouri's Standard Specifications, and is used for resistance to scaling on new bridge decks. Secondly, some recent projects re-texturing decks built with dense concrete overlays have specified penetrating concrete sealers. The concern was if linseed oil was used on the diamond ground surface, it might not have good frictional properties. Either extra linseed oil might be left on the surface or the linseed oil might not cure quickly enough to switch traffic onto it after short lane closures. It was decided that new penetrating sealers be used in these situations by special provision to the contract. Four types of penetrating sealers were tested against linseed oil in the laboratory to rate their effectiveness, pick criteria for testing needed in accepting sealers and write a new specification to best protect concrete bridge decks from deterioration. In the case of new concrete decks it is recognized by American Concrete Institute that cracks smaller than 0.18 mm do not let chloride ions from salt penetrate through them. It was concluded that if there are very few cracks bigger than this, those cracks do not need to be sealed, and linseed oil can be used to help prevent scaling. If cracks were bigger than this it would be better to forego the linseed oil treatment and use a crack sealer. A table with concrete sealers classified into three performance groups is presented with the sealers ranked by performance and including cost per ft. 2. It was found from this study that penetrating sealers are not good at sealing large cracks. Although an Ohio DOT test was used in this study to measure crack sealing capabilities, it did not give consistent answers. It did help identify what size cracks need to be sealed by a better crack sealer, such as a two-part epoxy. It was found that cracks in the range of 0.30 mm to 0.64 mm start to allow a saline solution to leak through the concrete very swiftly. So even if a penetrating sealer is used on a deck with many cracks, those 0.64 mm cracks and bigger need a more appropriate crack filler/sealer to seal the individual big cracks first. Sealing cracks on existing older decks should be done using less expensive products that seal the entire small and medium-sized cracks and are effective for 2-4 years. A table listing these crack sealers is also presented. As a result of testing in this study one of these products was approved for preventive maintenance use statewide.
Download or read book Crack and Concrete Deck Sealant Performance written by Karl Andrew Johnson and published by . This book was released on 2013 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effectiveness and Performance of Crack Sealants for Bridge Decks written by José A. Pincheira and published by . This book was released on 2009 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this study was to assess the effectiveness and performance of selected products for sealing cracks in concrete bridge decks. The project was a follow up study of an earlier investigation to expand the selection of crack sealers for use in the field. A total of nine crack sealants were tested in this study under laboratory conditions that simulated the exposure to deicing salts and freeze?thaw cycles encountered in practice. Five of the products had been tested earlier under the same laboratory conditions but for a limited range of crack widths. Four additional products were also included in this study. Based on the test results, the performance of the sealants was evaluated and ranked, and recommendations for their use in the field are provided.
Download or read book Concrete Bridge Deck Crack Sealant Evaluation and Implementation written by and published by . This book was released on 2014 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: A total of 12 sealant products were applied on the Smith Avenue High Bridge in St. Paul and evaluated over a three-year period. Details, such as surface preparation and application methods, were documented for each product and are conditions specific to each product. Sealant performance was evaluated through field permeability testing, visual observations, and petrographic examination. Visual observations provided evidence that approximately 67 percent of test sections were performing effectively after one winter but only 4 percent after two winters. After three winters, 58 percent of the test locations were visually characterized as ineffective and 42 percent as partially effective. Product performance significantly reduced over the third winter, primarily due to major loss of sealant and surface sand materials. Coring was performed after the second winter, and the cores were photographed and subjected to a petrographic evaluation. The observed depth of sealant penetration was highly variable and likely is dependent on the presence of debris within the crack, original crack width, and the deck temperatures during application. The predominant failure mode observed under magnification was detachment from the crack face and not within the sealant materials. Based on numerous factors, four epoxy and three methacrylate products were recommended for consideration on MnDOT's Approved Products List. Each product recommendation contains the surface preparation and application method conditions under which they were applied. It is also recommended that MnDOT look into increasing the frequency of its routine crack sealing maintenance program from the current five-year cycle.
Download or read book Sealing of Cracks on Florida Bridge Decks with Steel Girders written by Adel ElSafty and published by . This book was released on 2012 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the biggest problems affecting bridges is the transverse cracking and deterioration of concrete bridge decks. This research identifies suitable sealing materials for deck cracks showing their ability to span cracks of various widths and achieving performance criteria such as penetration depth, bond strength to crack walls, elongation, viscosity, penetration, and suitability of the type of sealant. Sealant performance was investigated by testing core samples to determine the depth of sealant penetration, bond, and tensile strength. Sealer samples were tested to verify their strength, modulus of elasticity, and elongation. A finite element model was developed to investigate the factors affecting tensile stresses and crack tendency. It also checks the live-load deflection limit, which is an important factor in bridge deck cracking. An Excel spreadsheet was also developed to predict the deck cracking accounting for shrinkage, thermal effect, creep, concrete mix design, deck restraint, loading, and environmental effects.
Download or read book Evaluation of Crack Sealant Performance on Indiana s Asphalt Concrete Surfaced Pavements written by David R. Ward and published by . This book was released on 1993 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Concrete Bridge Deck Crack Sealing written by Ashraf M. Rahim and published by . This book was released on 2006 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crack Sealing and Filling written by Jusang Lee and published by . This book was released on 2015-12-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigated the current state of practice for crack sealing/filling. In addition, the INDOT crack sealing/filling practice was experimentally evaluated for the effectiveness of crack sealing/filling, the effectiveness of routing, the performance of the different types of crack sealants and fillers, the validity of sealant performance grade system, and the crack sealing/filling equipment performance. The key findings from an extensive literature review and nationwide/statewide survey performed in 2012 are the following: (1) 65% of the responses indicated that the routing is required for the crack sealing/filling application; (2) ASTM D 6690 Type II was the most widely used sealant type and only Missouri and Indiana included emulsions in their specifications as crack sealing/filling materials; and (3) crack sealing/filling equipment availability and their maintenance were the biggest concerns.Based on the two-year experimental investigation, the crack sealing/filling was determined to be effective in preventing the occurrence of pavement surface crack distress. The crack sealing/filling was concluded to be effective in maintaining crack integrity and resisting sealant and filler deformations due to the seasonal crack movement. The routing was not determined to be effective in terms of the pavement performances. However, Adhesive/Cohesive/Spalling (ACS) failure results showed that the routed sections significantly outperformed the non-routed sections. In addition, the test results indicated that the ASTM 6690 Type II crack sealants performed relatively well in terms of pavement and crack performance. The correlation between the sealant performance grades and the pavement and crack performances with different types of sealants and fillers were poor and insignificant.The experimental results showed that the cracks on wet pavement treated with HAL had significantly higher bonding between the materials and asphalt pavement surface than the cracks treated with the conventional air compressor. Therefore, the incorporation of a hot air lance in the wet condition is recommended to extend the operable time and seasonal availability for crack filling and sealing construction (2070 and 2090 Activities).
Download or read book Performance of Concrete Bridge Deck Sealers written by Jonathan Riley Dunn and published by . This book was released on 2015 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research was to determine an improved method for evaluating bridge deck sealer products for the Alabama Department of Transportation (ALDOT) through a synthesis of two testing methods: NCHRP Report 244 Series II tests and standards developed by the Alberta Ministry of Transportation (BT Series). Five sealer products were evaluated for their resistance to moisture and chloride ingress, performance after simulated traffic wear, and depth of sealer penetration into the concrete. The products tested included four epoxy-based sealer products and one sodium silicate sealer product. The sealers were evaluated on three different concrete mix designs representing the range of bridge deck concrete in service with ALDOT. Concrete cube specimens were fabricated, sealed, conditioned, and subjected to different tests. One test evaluated the waterproofing performance of sealers before and after abrasive conditioning (representing traffic wear). Another test determined the products' ability to resist chloride penetration and their waterproofing performance in a saltwater solution. The chloride content was measured by potentiometric titration with silver nitrate and X-ray fluorescence spectroscopy (XRF). Sealer penetration depth as determined by a dye method and scanning electron microscopy (SEM). Initial (pre-abrasion) waterproofing performance results generally showed a good correlation to chloride resistance. XRF and titration analyses provided nearly identical results for measuring chlorides in concrete; however, XRF is a preferred method for determination of chloride content because it is much faster than titration. Two epoxy sealers outperformed all products for all evaluation criteria. A third epoxy sealer had good overall performance, but many specimens sealed with this product developed cracks that warranted further investigation. The sodium silicate sealer performed poorly compared to all four epoxy-based sealers. The epoxy-based sealers did not exhibit any measurable sealer penetration into the concrete and the sodium silicate sealer penetrated less than 100 mm into the concrete.
Download or read book Minnesota Department of Transportation Research Services Annual Report written by and published by . This book was released on 2009 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication provides a guide to the Minnesota Department of Transportation's current research activities.
Download or read book Protective Coatings for Concrete Bridge Decks written by Richard J. Irwin and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance of protective coatings for bridge decks is evaluated. Applications to bridges on the New York State highway system from 1961 through 1967 included 1) surface overlays, 2) membranes between the structural slab and bituminous wearing course, and 3) surface sealants. Overlays and membranes consisted of epoxies, polyesters, polyurethanes, latexes, neoprenes, silicone rubbers, and asphalt cutbacks. Surface sealants included silicones, distillate oils, and linseed oil. None of the surface overlays lasted more than 2 to 3 yr. However, a flexible polyester resin with fiber glass has provided satisfactory service for 1-1/2 yr and will remain under observation. Leakage of box-girder bridges with a membrane was primarily due to shear-key construction (since modified), while the same materials applied to composite bridges were associated with leakage that could not be explained. A more comprehensive survey of membranes is planned. Silicone and distillate oil sealants on non-air-entrained concrete did not improve long-term durability. Air-entrained concrete, both with and without linseed oil treatment, showed no evidence of deterioration after 4 yr of exposure.
Download or read book Performance and Durability Assessment of Concrete Bridge Deck Sealants written by Bipin Adhikari and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
