Jumbo Construction Prestressed Test on R25 Self Drilling Hollow Bar
On May 13th, 2023, China Railway Equipment Company and ONTON held a Jambo construction prestressed test on R25 self drilling hollow bar at Zijia Tunnel project on the Yaonan Expressway. Two tests were conducted: R25 prestressed hollow anchor bar with expansion shell R25 anchor bar prestress requirement is >60kN, we tested …
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