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SLAB JOINTS

SLAB JOINTS

SLAB JOINTS

Product catalog summary
Overview: The document provides technical details on slab joint shrinkage and expansion joints used in various construction applications such as industrial floors, logistic centers, shopping malls, and airports. It emphasizes the importance of these joints in preventing random cracks in concrete slabs.
Specifications: The document outlines the specifications of ARFEN slab joints, which include components like upper flat steel, lower mold steel plate, anchor studs, load plate and cover, supporting kit, calibrated lower plate, and plastic bolt and nut. The joints are designed to minimize vertical movement and allow for ±20 mm linear movement in both longitudinal and transversal directions.
Types and Dimensions: Various types of slab joints are listed with their respective heights, load plate centers, lengths, and recommended depths. For example, the SJ 115 type has a height of 115 mm and a recommended depth of 115-140 mm.
Materials and Coatings: The slab joints are made from hot dip galvanized and stainless steel (SS 304 grade), with options for 316 grade stainless steel for environments exposed to aggressive solutions.
Installation Recommendations: Proper load transfer and level maintenance on both sides of the joint are crucial for long-term performance. Joints should be filled with suitable materials like mastic or epoxy-based mortar, depending on the gap size.
Crack Prevention Methods: Two primary methods are discussed: increasing steel reinforcement and using Arfen slab joints. The latter is preferred for its ability to create controlled weak lines that prevent random cracking while maintaining aesthetic integrity.
Thermal Expansion Considerations: The document explains the thermal expansion coefficient of concrete and provides a formula for calculating elongation and shortening due to temperature changes.
Joint Spacing Guidelines: Recommendations for joint spacing based on concrete slab thickness are provided, with specific guidelines for airport constructions.
Timing and Cutting: The importance of timely cutting of shrinkage joints is emphasized to prevent uncontrolled crack formation. The document advises cutting within the first 6 to 18 hours after concrete casting.
Conclusion: ARFEN slab joints are presented as an effective solution for minimizing risks and maximizing utility in concrete slab applications, supported by recommendations from the ACI 360 R-10 flooring slabs design guide.
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Catalog excerpts

SLAB JOINTS-1

Industrial Floor Logistic Centers Shopping Malls – Expo Centers Ports – Concrete Roads Airports SLAB JOINT SHRINKAGE - EXPANSION JOINT

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SLAB JOINTS-2

SLAB JOINT After concrete casting After opening of joint (1-3 weeks) 1. Upper Flat Steel ST 37 2. Lower Mould Steel Plate ST 37 (S 235) 3. Anchor Studsı Ø10*100 ST 37 with 250 mm spacing 4. Load Plate and Cover / 8mm ST 52 Steel - Polyamide or ABS Upper Cover 5. Supporting Kit (Optional) ST 37 6. Calibrated Lower Plate (Optional) ST 37 7. Plastic Bolt + Nut Polyamid Arfenslab expansion joints are steel expansion joints that extend the service life ofconcrete slabs carrying high loads.Slab joints can beeasily applied in industrial floors and minimizeuncontrolled crack formation.Steel surfaces...

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SLAB JOINTS-3

w w w .ar fe n .c o m ARFEN SLAB JOINT MONTAJ AKSESUARLARI STEEL PLATE SOCKET In order to ensure long-term use of slab joints and high performance, the load transfer must be applied correctly and care should be taken to ensure that both sides of the joint remain at the same level. There are two ways to achieve this for vehicle traffic. Joints must be filled with suitable materials such as mastic and the corners should be reinforced with steel plates. Where concrete slabs are to be cut, the steel sheets on both sides of the joint must be used to protect the edges of the joint. These two lanes...

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SLAB JOINTS-4

w w w .ar fe n .c o m Traditional Joint Installation and Slab Joint Installation Traditional Joint Quantity Length 11, Width 25 Total : 2350 mt Joint Arfen Slab Joint Length 1 , Width 6 Total : 250 mt Joint Concrete Slab System Detail Below is the shrinkage / crack control joint spacing which should be arranged according to the concrete slab thickness. There are two basic methods for controlling and preventing cracks on the concrete surface. The first method is to increase the amount of steel reinforcement that will prevent random crack formation. When cracks are controlled by steel reinforcement...

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SLAB JOINTS-5

SLAB JOINT SHRINKAGE - EXPANS IONJOI NTS The second and most commonly used method of preventing crack formation and random crack formation is to use Arfen slab joints in concrete slabs. In this method, weak lines are created at predetermined places in the upright, and the concrete is cracked in a straight line along this line. It allows to work without damaging the aesthetic appearance on the concrete surface which cracks down from the concrete surface along this joint. Slab concrete laying is still cracked as normal behavior, but random crack formation is prevented and an unbroken or deformed...

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SLAB JOINTS-6

w w w .ar fe n .c o m ∆L:9,9x10-6*40*30mt=0,01188m(11,88mm).Nonetheless, many international specifications do not find it appropriate to make joints with more than 24 meters clearance. In the case of airport constructions, if the concrete slab thickness is less than 30 cm, the joint interval can be accepted as long as it is between 9 meters and 12 meters and if it is more than 30 cm, the joint interval can be accepted as about 15 meters. (Design of concrete airport pavement -Page 26) Here, the coefficient of 9.9 x10-6 is the coefficient of elongation of one meter section of concrete elements...

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SLAB JOINTS-7

ARFEN İNŞAAT TAAHHÜT SAN. ve TİC. A.Ş. Atatürk San. Bölgesi Ömerli Mah. Hakkı İleri Cad. Gülce Sk. No:22 Hadımköy -Arnavutköy / İSTANBUL Tel: +90 212 485 16 15 Fax: +90 212 485 16 77 w

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.