Changsha DLADTO Rebar Splice Co., Ltd

The raw material of   rebar coupler   is 45# carbon steel. It means that the rebar coupler will rust within a few minutes if it encounters water. Therefore, preventing rust in the process of producing the coupler is an important step. The reason that main causes of rust in the coupler are as follows: 1. During the thread tapping process in the production of rebar couplers, cutting fluid is used. The cutting fluid is a water-soluble oil agent with certain rust removal and rust prevention functions. If the quality of the cutting fluid is not strong and the concentration is low, it will make the rebar couplers unsuitable for storage and prone to rust. 2. The packaging bag for rebar couplers is a laminated woven bag. If the quality of the woven bag is poor and the sealing is not tight, it will cause rusting of the rebar couplers. 3. During the transportation process of rebar couplers, if they are not handled properly, the packaging bags of the rebar couplers may get damaged. If t...

Steel bar couplers   are used to connect steel bars and have internal threads corresponding to the male threads. The simplely construction process is using a rolling process to create straight threads on the end of the steel bars and connecting them with the appropriate couplers. So, what are the key points to attention during the manufacturing process? In the following, the coupler manufacturer   DLADTO   will provide you with a detailed introduction: 1.The thread, tooth shape, and pitch of the processed rebar threads should be consistent with the connecting coupler threads, and they should be inspected and approved by matching gauges. 2. When processing rebar threads, water-soluble cutting lubricant should be used. When the temperature is below 0℃, 15%-20% sodium nitrite should be added. Machine oil is not allowed as a lubricant or threading without any lubricant. 3. Operators should inspect the appearance quality of rebar thread heads individually and make operator ma...

The sleeve should be made of high-quality carbon structural steel, low-alloy high-strength structural steel, or alloy structural steel. Grouting material for sleeves: It is a dry mix composed of cement as the basic material, fine aggregate concrete admixtures, and other materials. The  grouting sleeve  is a combination of specially processed sleeves, matching grouting materials, and assembled reinforcements. When connecting the reinforcements, quick-hardening non-shrinkouting materials are injected, and the steel reinforcements are connected to the sleeves through the bond between the materials. Grouting sleeve connectors have the advantages of reliable performance, wide applicability, and easy installation. 1. The steel reinforcements are fully and evenly enveloped by the concrete, and if two reinforcements are tightly anchored side by side, they form an overlap. 2. There is no need to increase the concrete strength grade or the length of the reinforcement anchorage. At the s...

We can judgment standard of   rebar joints   with the following regulations: 01 Grade I Joint There are two criteria for judging Grade I Joints: 1) The actual tensile strength of the reinforcing bar connection must be greater than the standard strength of the reinforcing bar material and it should fracture at the reinforcing bar. 2) If the connecting piece does not break the reinforcing bar, the actual tensile strength of the reinforcing bar connection must be greater than 1.1 times the standard tensile strength of the material, reaching at least 594Mpa to be considered qualified. The standard tensile strength value for HRB400 reinforcing bar is 540Mpa. 02 Grade II Joint The criteria for judging Grade II Joints is that as long as the actual tensile strength value of the reinforcing bar connection exceeds the standard tensile strength value of 540Mpa, regardless of where the connecting piece breaks, it can be considered qualified. 03 Grade III Joint The criteria for judging Gra...

Although the advantages of   mechanical splices   are well recognized, a major concern has been their high cost for applications where the codes permit the use of lap splices. But is the perception that mechanical splices cost more than lap splices a reality? By using couplers, contractors can be more cost efficient, able to achieve from 20-50% of cost savings compared to lap splicing. Apart from that, there are many other savings which can be anticipated such as; Reduction no. of joints 6 meters length will be most ideal for joining and this would result in reduction of no. of laps by, Assuming height of building: 100 metres Typical floor height: 3.2 metres No. of laps: 100 / 3.2 = 31 laps No. of coupler joints: 100 / 6 = 16 joints Therefore reduction in no. of laps: [(31-16)/31] x 100% = 48% Minimal wastages of HTDBs Assuming floor height of 3.2m and lap length of 1.275m Length of steel bar per floor is : 3.2m + 1.275m = 4.475m For a 12metres steel bar, two nos of 4.475metre...

  Cost Effectiveness The conventional method of connecting reinforcement bars with lap joints in reinforced concrete need not be always appropriate. Advantages of simplicity and economy in lap splicing is limited to smaller diameter bars, mechanical couplers offer the solution for splicing when large diameter bars are involved like 20，25，32 and 40mm Diameter where huge cost saving can be done. Structural Reliability Coupler spliced perform like continuous reinforcement. That develops full tensile strength mechanically, independent of concrete. Coupler splices are excellent for severe condition like earthquake, typhoon, especially suitable for condition that demands higher ductility of building structure. Designers Friendly Rebar-join coupler reduces rebar congestion and improves concrete flow & consolidation. It offers greater flexibility in design options. The simplicity in detailing of reinforcement, particularly in reinforcement congestion zones minimizes the reinforcement f...

Rebar reducing sleeve   are used to connect steel bars of different diameters. The rebar reducing sleeve models are 18 to 16, 20 to 18, 22 to 20, 22 to 18, 25 to 22, 25 to 20, 25 to 18, 28 to 25, 28 to 22, 32 to 28, 32 to 25 , 36 to 32, 36 to 28, 40 to 36mm, etc. Rebar reducing sleeve can be widely used in reinforced concrete structure engineering in steel bars in various industrial and civil buildings. It is especially suitable for high-rise buildings, roads, bridges, subways, tunnels, power stations, dams and other buildings and structures with high explosion-proof and earthquake-proof requirements. Changsha DLADTO Rebar Splice Co., Ltd  as a division of  ADTO Group . We are a professional rebar coupler producer, we have been in this field for a long time with customers for all over the world. Welcome to contact us for any inquiry.