Application of environmentally friendly concrete demolition techniques in the repair of shipping locks

Moscow State University of Civil Engineering, Yaroslavskoye sh., 26, 129337, Moscow, Russia

^* Corresponding author: bazanov_kim@mail.ru

Abstract

The paper analyzes the traditional mechanic technique of concrete demolition and the promising hydro demolition techniques from viewpoint of waterworks operators. The mechanical concrete demolition technique using chisel hammers is immediately available for the use and relatively cheap, but it is associated with considerable labor cost, generation of dust and noise. Concrete hydro demolition technique using high-pressure water has much higher productivity and reduces repair completion time, does not damage reinforcement, and ensures good adhesion of new concrete to old concrete. Basic technical characteristics of hydro demolition equipment and its pricing are given. On the basis of the current situation with regard to the estimated regulation and financing of construction projects, including from budgetary funds, the author considered the possibility of using promising methods of removing exposed concrete of lock chamber walls. A comparison was made between the cost and the regulatory and actual labor intensity between the methods of mechanical and hydraulic destruction of concrete. It has been shown that application of the hydraulic demolition technique is constrained by financial capabilities and estimates regulatory requirements. For substantiation of using the concrete hydro demolition techniques, operators need to adjust the regulatory framework for federal assessments.