SECTION 522: CHEMICAL ADHESIVE ANCHORS
522.1 Description
This Work consists of providi ng chemical adhesive anchorage sys tems.
522.2 Materials
The Contractor shall use chem ical adhesive anchorage for the in stallation of steel anchors in concrete Structures.
522.2.1 Chemical Adhesive Anchor Devices
The Contractor shall select chem ical adhesive anchor devices fr om the Department’s Approved Products List . The Contractor shall notify the Project Manager of the selec tion at least 21 Days before using the devices on a Project. The Contractor shall provide devices in accordance with Table 5 22.2.1:1, “Chemical Adhesive Anchor System Ultimate Tension Load Requirements.” Th e Contractor shall use chemical adhesives of organic a nd inorganic compounds (includin g epoxies, polyurethanes, methacrylates and vinyl este rs) to develop bond to concrete. Table 522.2.1:1 Chemical Adhesive Anchor System Ultimate Tension Load Requireme nts Anchorage bolt diameter (inch) or bar size Minimum ultimate tension load (pounds) per ASTM E488 One (1) inch 37,700 ⅞ inch 28,900 3/4 inch 21,200 5/8 inch 14,700 1/2 inch 9,400 3/8 inch 5,300 1/4 inch 2,400 No. 6 21,200 No. 5 14,700 No. 4 9,400 (Based on ASTM A307 anchor, Grade 60 rebar and 3,000 psi concre te)
522.2.1 1 Hardware
The Contractor shall provide ASTM A 307 Grade A threaded rod wi th nut (ASTM A 563A Hex) and washer (ASTM F 844) or ASTM A 193 Grade B7 threaded ro d with nut (ASTM A 194 Grade 2H) and washer (ASTM F 436). The thread rod, nut and was her shall be zinc coated per AASHTO M 298, Class 50 (ASTM B 695, Class 50). If stainles s steel anchor is specified in the contract, the Contractor shall provide ASTM F 593 thread ed rod with nut (ASTM F 594) and washer (ASTM A 240). The Contractor shall provide Grade 60 deformed steel bar reinfo rcements in accordance with AASHTO M 31. The Department will not accept metal wedge expansion-type ancho rs as substitutes for
522.2.1 2 Materials Certification
The Contractor shall submit a sample of the concrete chemical a nchor device along with the manufacturer’s installation instructions to the Project Man ager. The Contractor shall submit independent certified test results for expansion anchors in accordance with ASTM E 488 to the Project Manager. The Contrac tor shall submit independent certified test resul ts for adhesive-bonded and othe r bonding compounds in accordance with ASTM E 1512 to the Project Manager. The Contra ctor shall use ASTM A 307 Grade A steel for anchor bolts (rods), Grade 60 steel reinforci ng bars, and 3,000 psi concrete for these independent certified tests. The Contractor shall test chemical adhesive anchor device syste ms installed per manufacturer’s recommendations. The Contractor shall provide independent test results to certif y that the average ultimate tension load strength and method of installation of the propose d concrete anchorage system are in accordance with Table 522.2.1:1, “Chemical Adhesive Anch or System Ultimate Tension Load Requirements.”
522.3 Construction Requirements
The Contractor shall prepare holes and installation of the chem ical adhesive anchors in accordance with the manufacturer’s recommendations and instr uctions, including weather and temperature limitations. The Contractor shall not install chemical adhesive anchor systems before concrete attains its design strength.
522.3.1 Drilling of Holes
The Contractor shall use drilling methods that do not cause con crete spalling or cracking, or damage to the main reinforcing steel members. The Contracto r shall drill the diameter and depth of the holes in accordance with the chemical adhesive anc hor manufacturer’s instructions, using drilling methods and drill bits specificall y intended by the manufacturer for the particular anchorage. Diamond core drilling of the holes is not permitted unless allowable by the manufacturer. The Contractor shall repair spalled or damaged concrete as dire cted by the Project Manager. The Contractor shall not drill with a lubricant; water is not a lubricant. The Contractor shall maintain a distance of at least two (2) in ches from the bottom of the structural slab to the bottom of drill holes. The Contractor s hall only use anchor systems that can maintain this minimum surf ace-to-drill-hole distance requir ement and still meet certified strength requirements.
522.3.2 Hole Preparation
Hole preparation shall be in accordance with the Manufacturer’s recommendations. . The Contractor shall ensure holes are dry before installing anchors . :
522.3.3 Finishing
Section 522: Chemical Adhesive Anchors Page 436 After the Contractor inserts the anchor into the full depth of the drilled hole, the Contractor shall strike flush the excess adhesive with the conc rete surface. After placing the anchors, the Contractor shall not move anchors and shall not lo ad the anchors until adhesives are fully cured.
522.3.4 Field Proof Load Tests
The Contractor shall submit the testing method to the State Mat erials Bureau before beginning the field pullout tests . The Contractor shall use an applied test load for the chemical adhesive anchors field pullout tes ts in accordance with Table 5 22.3.5:1, “Chemical Adhesive Anchor Design Loads.” The Contractor shall perform proof load tests only if the Contr act requires. The NMDOT may perform proof load tests at NMDOT discretion. If the Contr act requires proof load tests, the Contractor shall use nondestructive loading and stop the te sts when the design tensile forces have been sustained for at least three (3) minutes witho ut creep or deflection. The Contractor shall use anchors that attain the specified test loads without permanently displacing the anchor or damaging the concrete. The Contractor shall replace anchor devices that fail the load test. The Cont ractor shall test replaced an chors. The Contractor shall repair spalled or damaged concrete from lo ad tests as directed by the Project Manager. In the event that proof load tests fail to me et requirements, the Contractor shall submit a corrective ac tion plan for deficiencies.
522.3.4 1 Acceptance
The Department will accept anchor if the specified test load is attained without permanently displacing the anc hor or damaging the concrete.
522.3.4 2 Field Test Procedure
If the Contract requires proof load tests, the Project Manager will designate a random portion of not less than five percent (5%) of the installed con crete chemical anchors for load testing. The Contractor shall perform load tests in accordance w i t h A S T M E 4 8 8 f o r s t a t i c testing. If any individual test fails, the Contractor shall te st all anchors for compliance with Table 522.3.5:1, “Chemical A dhesive Anchor Design Loads.”
522.3.5 Design Loads
The Contractor shall ensure chemical adhesive anchor systems ar e in accordance with Table 522.3.5:1, “Chemical A dhesive Anchor Design Loads.” Table 522.3.5:1 Chemical Adhesive Anchor Design (Proof) Loads Anchorage bolt diameter (inch) or bar size Design load and tensile test load (pounds) per ASTM E488 One (1) inch 9,425 ⅞ inch 7,225 3/4 inch 5,300 5/8 inch 3,675 1/2 inch 2,350 3/8 inch 1,325 Chemical Adhesive Anchor Design (Proof) Loads Anchorage bolt diameter (inch) or bar size Design load and tensile test load (pounds) per ASTM E488 1/4 inch 600 No. 6 5,300 No. 5 3,675 No. 4 2,350
522.3.6 Welding
Welding to post-installed anchors is not permitted.
522.4 METHOD OF MEASUREMENT—Reserved
522.5 Basis of Payment
The Department will make no sepa rate payment for this Work, unl ess otherwise specified in the Contract.
522.5.1 Work Included In Payment
The Department considers all labor and Materials for the prepar ation of holes and installation of dowels and anchors Incidental to the completion of the Work and will not make separate payment. Section 523: Cementitious-Grouted Dowels And Anchors Page 438