Surface cracking of pourable joint seal on bridges

Section loss, rust holes and corrosion cracks at deck joint. Cracking of newly placed binary portland cementslag concrete adjacent to bridge deck expansion dam replacements has been observed on several newly rehabilitated sections of bridge decks. Aashto elements, defects, and condition states 2015 interims. Element bridge inspection data for the national bridge inventory. Structure inspection manual part 2 bridges chapter 6 roadway and appurtenances. The main preventive maintenance objective for concrete bridge decks is to. Both dsb 800 and dsb 900 sl are ideal for sealing irregular joints and cracks. The preformed bridge joint seal will be paid for at the contract unit price per. The top surface of the deck or slab has no symptoms of distress.

For example, a study showed that when crack sealing was completed as a pretreatment to a chip seal, 100% less cracking developed after 2 years of observation in comparison to a chip seal only treatment. Bond failureseparation of joint from header 10, heave 9, cracking 8, rutting 8, improper material mix 1, misaligned. More than 30 percent of the adjacent concrete is damaged. See bridge deck preservation matrix 2 fair correlates to deck top surface nbi ratings 6. The working time of emcrete is less than 10minutes after mixing. It is the only portion of the bridge in direct contact with vehicle traffic. The manual provides visual aid to the inspector and. It can be lightly trowelled to ensure a consistent surface.

Deck bottom surface former soffit cracking ea 359 14 false decking former sheeting under deck ea 378 15. It is supplied precompressed smaller than the joint gap. Element bridge inspection data for the national bridge. Bejsonareel is a costeffective version of emseals industrystandard bejs bridge expansion joint system product shipped on a reel for rapid installation into small joints 12 to 1 14inches wide 12 30mm. Conventional expansion joint seals have their own individual. Occasionally there is a need to seal cracks to prevent infiltration of water, chlorides, and other contaminants. Dec 27, 2018 the secret to fixing wide concrete cracks is to undercut the sides of the crack to give it an inverted v shape. Nchrp 12100 guidelines for maintaining small movement bridge. Aashto elements, defects, and condition states 2015. Each of these silicone products is formulated for use on highway, airport, parking structures, bridge joints, and other concrete applications such as sidewalks, floors and driveways.

Asphaltic plug jointsmall mr mr 100mmmr 20m, 35 m large spansskew jan 22, 2018 asphaltic plug joint seal bejs is used by an increasing number of dots as a secondary seal under asphaltic plug joints. It is highly resilient and has excellent recovery characteristics even after extended periods of. Guidelines for design, installation, and maintenance of a waterproof wearing surface for timber bridge decks richard e. Modular expansion joint is used when the joint movement exceeds 100mm. Strip seal expansion joints effectively seal bridges. Deckoseal 150 twopart, pourable joint sealant is a selfleveling, polysulfidebased sealing compound. Preventative maintenance for concrete bridge decks vdot. Pontis rating of the pourable joint seal pontis element pourable joint seal 401 is rated 3. Sealtight dci flooring industrial seamless floors and. Crack sealing as a pretreatment improves the effectiveness of other surface treatments in asphalt pavements. Candida te bridges with either strip seal expansion joints, pourable joints, or compression joints with greater than 20 ft 6. Surface seal is a premium, 2component, catalyzed, polyamide, epoxy coating with exceptionally high gloss, hardness and overall performance.

Nchrp 12100 guidelines for maintaining small movement. The pontis bridge inspection coding guide was developed by the staff. Better bridge joint technology umass transportation center. It is a nonstaining sealant that cures to a firm, flexible, tearresistant rubber. Bor bridge joint sealant for bridge expansion joints and. The emcrete is then mixed in accordance with the complete installation instructions in the premeasured amounts provided. Sealer evaporates and gets on vehicles and other surfaces. The modular expansion joint has many advantages including.

Decko seal 125 is highly resilient and has excellent recovery characteristics, even after extended periods of compression or elongation. Internal curing has primarily been used in bridge decks in illinois, indiana 8, iowa, new york 9, and utah 10. If a thin layer of the surface of the concrete slab is peeling, it can be a result of two common installation errors. Causes of early age cracking on concrete bridge deck. Guidelines for design, installation, and maintenance of a. Structure inspection manual part 2 bridges chapter 6. Repair of pourable joint seals should be considered when. The distressed area is 2% or less of the deck surface area. Daniel dolan, associate professor of wood science and forest products.

It is a versatile hotapplied, pourable, selfadhesive ridged asphalt binder containing selected aggregate to ensure good load bearing and skid resistant characteristics. The method shall not alter the joint profile including rounding of the top corner or alter the texture of the concrete riding surface. Sealtight dci flooring industrial seamless floors and walls. Meadows has been leading the way in product innovation and technology. Compression seal size seal and opening to always be in compression pourable seal joint edges must be completely clean and dry, improper placement of backer rod anchorage of armored headers and sliding plate joints is critical. The secret to fixing wide concrete cracks is to undercut the sides of the crack to give it an inverted v shape. The orf compression seal expansion joint system is used for small movement expansion joints, in deck of parkings, precasted structures and other types of concrete structures. Condition the repair surface with belzona 4911 magma tx. Airfield, bridge decks, bridge expansion joint headers, and highway pavements. In a sense, this approach type is a bridge to the bridge. Jan 10, 2019 watertight bridge seal for smaller joints. Designed to protect and beautify interior and exterior masonry, metal and fiberglass, the application possibilities are endless. Once in the compressed state, the top sections are much closer together and form a level walking surface and a pleasing visual effect for exposed vertical applications. Strip seal expansion joint lft 400 18 pourable joint seal lft 401 20 compression joint seal lft 402 22.

Guidelines for maintaining small movement bridge expansion joints scobs meeting minneapolis, mn. Incorporating an elastomeric concrete joint header minimizing edge spalling while achieving superior bonding capabilities to a variety of substrates. Maintenance requirements include periodic clean ing, replacement of the surface seal and filler as necessary, and repairs to the roadway surface adja cent to the joint. Nonshrink, epoxybased elastomeric concrete for repairing cracks and spalls. The installed preformed joint seal will be measured for payment in feet meters measured along the centerline of joint, from out to out of the deck, no measurement will be made for joint material used to turn up into the parapet, sidewalk, or median. This chapter presents ndot criteria for the design and selection of expansion joints in bridges. New hampshire department of transportation existing bridge. August 2017 264 of approaches are usedbecause the approach fill is difficult to compact in the vicinity of an abutment and may settle over time.

A random crack pattern in the bottom surface of a deck can also signify drying shrinkage or. Nbi rating of the expansion joint is rated 4 poor or less. Bejs is used by an increasing number of dots as a secondary seal under asphaltic plug joints. Clear dampproofing solution that eliminates moisture penetration from exterior, above grade masonry surfaces. Its factory fabricated transitions ensure watertightness, especially at the curb and wall under the asphaltic plug joint and acts as a belt and suspenders for these applications. Bridge inspection procedure manual condition state photos joints 4 june 2007 pourable cork joint seal jpos condition state 2 minor fine adhesion andor cohesion cracks may be present. Crafco mastic one is designed for large cracks and distressed surface areas too small for repaving. Without expansion joints, the concrete can crack or distort. Benefits the seal is compressed into place, providing a relatively flat profile surface that reduces tripping hazards and the collection of debris in the joint. Sealapores deep penetration into the tiny pores of brick and mortar forms a long lasting waterrepellent surface without changing the structures appearance. Loferski, associate professor of wood science and forest products j. Pourable joint seal 05829m page 2 of 2 june 28, 2018.

While other crack sealing techniques can restore capacity or provide for complete filling of a crack, the methods outlined in this section only cover sealing the cracks at the outer surface of the concrete. This helps the repair material to key into the crack, creating a mechanical bond in addition to the chemical bond between the patch material and the concrete. An expansion joint is commonly located on such structures such as bridges, highways and sidewalks. One of the key factors affecting bridgedeck performance is the penetration of chloride ions into bridgedeck concrete. For better traction on exterior surfaces use a broom finish. Sealapores deep penetration into the tiny pores of brick and mortar forms a long lasting waterrepellent surface without changing the structures. Pavement solutions for wide cracks and distresses crafco. Strip seal expansion joints for movements of up to 80 mm are expansion joints made of a single set of structural steel, rubber sealing strips and dowel rods. While other crack sealing techniques can restore capacity or provide for complete filling of a crack, the methods outlined in this section only cover sealing the cracks at. Expansion joints september 2008 191 chapter 19 expansion joints lrfd article 14. Good correlates to deck top surface nbi ratings 79. Asphaltic concrete above pourable joint is cracked indicating loss of adhesion. Maximum value varies according to manufacturer or joint type. Bridge joint maintenance transportation research board.

Section 461sealing roadway and bridge joints and cracks page 3 sealant or foreign material from joints will not widen the joints by more than 0. Minor spalls in deck andor headers may be present adjacent to joint. A thesis submitted to the department of civil engineering in partial fulfillment of the requirement for the degree of. Decko seal 125 twopart, pourable joint sealant is a selfleveling, polysulfidebased sealing compound. Bridge expansion joint lube adhesive for installation of d. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Joint cleaning and sealing issues plan the work for cooler months joints are wider, easier to clean joints are wider, pourable sealants work better bats less likely to be present inspect sealing operations backer rod placement critical thickness of sealant 12 not more or less seal up into curb or rail. Expansion joints often leak when they transition to a curb or parapet. Asphaltic plug jointsmall mr mr 100mmmr 20m, 35 m large spansskew michigan. The emcrete is then poured into the forms where it will selflevel and cure exothermically. Preventive maintenance of infrastructure elements such as reinforced concrete bridges in illinois is increasingly vital as resources to repair and replace these elements become less available.

Section 461 sealing roadway and bridge joints and cracks. Bridge expansion joint repair solutions using bejs from emseal. On timber bridges, a wearing surface is one of the most important components of the superstructure and serves two primary purposes. Deckoseal 150 is a nonstaining sealant which cures to a firm, flexible, tearresistant rubber.

Crete ii joint header allows for the joint system to monolithically bond to the deck creating a watertight system. When contraction is restrained, cracking can occur when the. Expansion joint bridge expansion, compression seal joints. According to the crosssectional shape, they are divided into 5 types, including gqfc, gqff, gqfe, gqfz and gqfrg. The system seals are available in a variety of sizes. Resealing joints with a pourable silicone sealant has become popular over the last. Our line of joint sealants is formulated for ease of use and provides complete joint and crack sealing capabilities. Pourable seal could be installed on the same day if elastomeric. What types of concrete bridge deck joints do you typically use. Our line includes coldapplied joint sealants, hotapplied sealants, polyurethanes, and polysulfidebased joint sealant products. Seal, replace, reconstruct, or eliminate deck joints.