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WebBond-Breaker Strips: Asphalt-saturated, organic roofing felt complying with ASTM D 226, Type I (No. ft./gal If, after application of the bond-breaking coat, steel, or concrete-placing operations are delayed longer than two weeks, the bond-breaking coat should be inspected carefully to determine if it still provides 100% coverage. If rain strikes the surface before the coating is dry, any damaged areas must be recoated. After the TILT-CRETE film is dry, normal rain should not affect the surface. Bond breakers will offer you some additional advantage such as: If you are planning to buy a bond breaker, have in mind the following factors before making a decision: Bond breakers are classified into two major groups: membrane-forming and non-membrane forming. Excellent stability; does not require continuous mixing throughout the application; the material must be mixed only prior to application. not enough product applied as the concrete panel is placed. Please ensure that enough product has been placed on the casting slab and a complete, continuous film of TILT-CRETE has been created. Sufficient application of the bond-breaker is the responsibility of the contractor and not W. R. MEADOWS, INC. The contractor and/or applicator is also responsible to ensure that application conditions are acceptable as noted on this data sheet and to ensure that the correct coverage rate is used. For further application instructions and contractor responsibilities and assurances, please contact the W. R. MEADOWS technical services department. Standard Classification System for Rubber Products in Automotive Applications, ASTM D2000-18. MASTERSEAL NP1 CAULKIING SEALANT TAN 10 OZ TUBE (50428972). Do not under apply or over apply TILT-CRETE. If less than the recommended amount is applied, the film may not be continuous or of sufficient thickness to inhibit inter-slab moisture penetration which may result in panels sticking to the casting slab. When used as a shear key to transfer out-of-plane loads between two panels separated by a control joint, the gasket material should be tested to determine its strength and applicability in this application. An alternative to avoid having the vertical reinforcement cross the slip plane is to place the reinforcement in the next cell over. German engineers have been Easy- Lift S is applied to the concrete casting slab to efficiently prevent the bonding of Where concrete masonry is used as a backup for veneer or in multi-wythe applications, consider the following: NCMA and the companies disseminating this technical information disclaim any and all responsibility and liability for the accuracy and the application of the information contained in this publication. While these attributes are the primary basis for concrete masonrys popularity, performance should not be taken for granted. In addition, care should be taken to provide joints at locations of stress concentrations such as (see Figure 1a for unreinforced masonry and Figure 1b for reinforced masonry): Consideration must also be given to the effect of control joint placement on load distribution within the wall. The joint should be no deeper than its width, preferably depth is 1/2 the joint width. Privacy and Cookies Policy Provide a continuous 1'x1' clean gravel or crushed rock drain for wall heights 3 ft. and higher. MASTERSEAL NP1 CAULKIING SEALANT LIMESTONE 10 OZ TUBE (50426583). Stakes xref Water Absorption: 0.001 (lb/ft2) ASTM D545-05. 184 0 obj <>stream The EOR is confused about the need for a COMPRESSIBLE material. (305 mm) past the vertical reinforcement adjacent to the opening (Figure 2c), joint reinforcement maybe placed in the first two mortar joints above the opening and extended to the control joint on each side, or a horizontal bond beam could be used, as shown in Figure 2d. Atlas Easy-Lift FD is a high-performance, chemically reactive, water-based, fast drying cure and bondbreaker WebGuide to Tilt-Up Bond Breakers A bond breaker is a material used to prevent adhesion of the newly placed concrete to the substrate. %%EOF 0000014667 00000 n HWVHyLS9E,QK.I.zFdJ~PPX8SJEFNL )"?/T8I89[t(:>O>L?-.e,ovq"tww}A>/VbNw8S8 Figure 4 shows details of the surface of a typical concrete masonry control joint. The depth of sealant should be approximately the joint width to reduce sealant strain, and hence extend sealant life. If you have questions about specific products or services we provide, please dont hesitate to contact us. Then this discovery could save your life. The main 0000060358 00000 n This keeps the joint weather tight while accommodating small movements. Be sure to coat down the side of the pier past the expected depth of concrete cap. Expansion Joint material includes a built-in tear-off strip. 0000068542 00000 n A bond breaker is a substance applied to concrete surfaces to guarantee that there is permanent bonding between the surfaces. This fast drying formulation allows crews to complete work more quickly and produces cleaner See TEK 10-3, Control Joints for Concrete Masonry WallsAlternative Engineered Method (ref. A flat backer rod foam design to create quality concrete expansion joints quicker and easier that traditional wood or composite spacers. Additionally, since foundation walls are subjected to relatively constant temperature and moisture conditions, shrinkage cracking in below grade walls tends to be less significant than in above grade walls. Although the detail shownin Figure 4a is considered the typical construction, research suggests that the joint profile shown in Figure 4b may offer improved performance because the flat profile reduces peeling stresses at the corners of the sealant. The gaskets are generally available in either PVC, complying with ASTM D2287, Standard Specification for Nonrigid Vinyl Chloride Polymer and Copolymer Molding and Extrusion Compounds (ref. 0000001837 00000 n Shelf life under Wedge (for use with Recess Member) Are there VOC requirements that need to be addressed. It is intended to provide the most straightforward guidelines for those cases where detailed volume change properties of the concrete masonry are not known at the time of design. Bond breakers are available in different forms, such as liquid, spray, rods, and tape. 0000115823 00000 n CAUTION: TO AVOID FOAMING, DO NOT MIX EXCESSIVELY. Compressive Strength: 14.9 PSI, ASTM D545-05, Suffix D @ 50%. Stud Rail Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Shrinkage cracks in concrete masonry are not a structural concern. What warranty is offered by the manufacturer? *Eng-Tips's functionality depends on members receiving e-mail. properties are achieved. Please refer to ACI 551.1R: Guide to Tilt-Up Concrete Construction for additional recommendations. ASTM International, 2016. The transition slabs deform to dissipate the thermal movements of the bridge. However, structural reinforcement, such as bond beam reinforcement at floor and roof levels that resists diaphragm cord tension, must be continuous through the control joint (see Figure 3g). Sure Lock Strongback Clamp It is placed to ensure that there is no adhesive molecular bond between the surfaces. Threaded Steel Setting Plugs Sure Lock Tie the mix water from the panel, which results in an easy to lift panel and a strong, smooth, uniform and clean panel control joints should extend through the facing when wythes are rigidly bonded, such as plaster applied directly to masonry units or for adhered veneer. Swift Lift Attachment Nut a length to height ratio of 1 : 1, which corresponds to 1 x (20 ft) = 30 ft (9.14 m), or. Already a member? This might be the most important video you ever watch (3 seconds). Control Joints for Concrete Masonry WallsAlternative Engineered Method. Table 1 lists recommended maximum spacing of these control joints based on empirical criteria. After studying the way 12,500 American men pee, scientist discovered a revolutionary way to reverse enlarged prostates. Threaded Bar Bond breakers are normally Approval may be granted for the application of 1100 concrete cure or one of the VOCOMP series cure-and-seal products from W. R. MEADOWS to be used as a cure coat prior to the application of TILT-CRETE as a bond-breaker. Webbond breaker material. Cures concrete casting slab and top of tilt-up or lift-slab panel. Close this window and log in. WebBond breakers for tilt-up . For positive bond breaking, it is essential the casting slab be 100% sealed with TILT-CRETE. Visually and physically inspect the slab to witness the entire surface has a definite sheen. Any dull spots must be recoated. Questionable areas can also be tested by dropping water on the surface. If the water beads-up or forms a bubble and does not penetrate the concrete surface, it is sealed. Any areas accepting penetration of the water must be recoated until a positive seal is achieved. hb```b``b`e`jdd@ AGLdg(1wn78&+$j{nWsFEy-4~XXRS(c)/?rS2cu?_mu:hXsO`5KfZ#weNim4|6mt8lY+v~67b0E8hvnl Stake Driving Tool Threaded Plastic Plug ASTM International, 2018. 0000060103 00000 n As an alternative to extending the lintel reinforcement a minimum of 12 in. Common control joint details are illustrated in Figure 3. 0000014833 00000 n Thanks. Terms of Use, USA Canada Franais Espaol International. subsequent concrete pours. Click Here to join Eng-Tips and talk with other members! For walls containing masonry parapets, consider the parapet as part of the masonry wall below when determining the length to height ratio if it is structurally connected by masonry materials. Like all construction systems, design decisions significantly influence field performance of the concrete masonry wall system. Therefore, it may be prudent to design the lintel to carry the full weight of the wall above it in addition to any superimposed loads. Because there is no lateral support at the bottom of the lintel, provision must also be made for load transfer between the panels. Provide a continuous 1'x1' clean gravel or crushed rock drain for wall heights 3 ft. and higher. 0000012364 00000 n <<2F6130032B3F7D4E822F4C36175224FC>]/Prev 134655/XRefStm 1837>> Shoulder or Roadway Pavement is required on top of the junction slab for its entire length on the traffic side of the Barrier/Noise Wall. APPLICATION Careful though with sonotube you may have difficulty removing the concrete. 2.12 PREFORMED CONTROL JOINT However, W. R. MEADOWS always recommends to inspect the slab to make sure of proper coverage. When control joints are required, concrete masonry only requires vertical control joints. Bond breakers are engineered products that form a membrane, allowing the surfaces to be separated easily. This keeps the joint weather tight while accommodating small movements. Figure 3d shows a grouted shear key. How fast does the bond breaker dry once it has been applied? Why isolate the top? 6. Waterstops Ties When stored indoors in original, unopened containers at temperatures between 40 90 F, optimum performance and best use is obtained within one year of date of manufacture. of subsequent concrete pours. Two-Hole Erection Anchor Evy%_FNZi-iYiF$wb*dPVEvVXi1w,H,M 4!}&r%Vr~ JR_yVI&f(^Vjrv{>Pg29SXeK= Be sure to coat down the side of the pier past the expected depth of concrete cap. See Example: Height: 3 inch, 4 inch, 6 inch, or 8 inch. Care should be taken when constructing this type of control joint to ensure that excessive mortar is not placed in the head joint of the two control joint units, whichcan potentially lead to bonding of the two panels. Reinforcing Bar Positioners: Wire units designed to fit into mortar bed joints spanning masonry unit cell with loops for holding reinforcing bars in Wrench Head Snap Tie Socket Normally, joint reinforcement is used in the common joint between the two to distribute the forces and keep any cracks that form tightly closed.