Health assessment of existing civilstructures of RWM plants

Amount

Core Test : Extraction of (75mm dia) concrete cores from specified locations and testing for compressive strength, water absorption & unit weight. The quoted rate shall include charges for filling back the core holes with polymer modified mortar/Micro-concrete and finishing etc. Complete all as per specifications and as directed by Engineer-In-Charge.

Ultrasonic Pulse Velocity Test (UPV) : Conducting ultra sonic pulse velocity test, at all specified locations prepared after chipping the plaster (till the concrete surface),on structural members (columns, beams,slab & walls,etc). to assess the intigrity of concrete as per latest BIS/ASTM specifications etc. Complete all as per specifications and as directed by Engineer-In-Charge.

Rebound Hammer Test (RH): Conducting Rebound Hammer test,at all specified locations prepared after chipping the plaster (till the concrete surface) ,on structural members (columns, beams,slab & walls,etc), for determining the estimated compressive strength of concrete and uniformity of concrtete as per latest BIS/ASTM standards etc. Complete all as per specifications and as directed by Engineer-In-Charge.

Chemical Test: Chemical tests on concrete in the laboratory to determine the parameters to understand the chemical deterioration/ degradation of concrete and its effect on reinforcement corrosion are: i) PH value (to check alkanity of concrete ). ii) Water soluble chloride content % ( by mass of concrete ). iii) Concrete total sulphate content. Note : Extraction and testing of concrete drill dust samples from the structures. 3 drill the samples from depths 0- 15mm , 15-30mm and 30-45mm shall be collected from each location.

On Core

On Powder

Carbonation test : To evaluate the depth of carbonation in the RCC structure, carbonation test shall be perform as per latest BIS /ASTM standard procedure carbonation test shall be carried out on specified dust samples. Depth of the carbonation shall be evaluated on concrete core separately.Complete all as per specifications and as directed by Engineer-In-Charge. Note:-The test shall be performed to determine the depth of concrete affected due to combined attack of atmospheric carbon dioxide and moisture causing a reduction in level of alkanity of concrete

On Core

On Powder

Rebar Mapping: Conducting Profometer scan at all specified location of the structure for reinforcement steel location, size, spacing between reinforcement and concrete cover measurement, etc.Complete all as per specifications and as directed by Engineer-In-Charge.

Half Cell Potential Test (HCP) : Conducting half- cell potential meter test at all specified location to assess the risk of corrosion including exposing the reinforcement for carrying out the test. The test shall be conducted as per latest BIS/ASTM specifications. The quoted rate shall include charges for filling back areas chipped for exposing the reinforcement with polymer modified mortar/Micro-concrete. Complete all as per specifications and as directed by Engineer-In-Charge.

Linear Polarization Test: (LPR): Conducting Linear Polarization Test: (LPR) for determining the estimate rate of corrosion as per the latest BIS/ASTM standards. Complete all as per specifications and as directed by Engineer-In-Charge.

Submission of Report : Preparation and submission of two copies of draft report as specified by E.I.C, after draft report approval final sumission of approved by five copies of report along with soft copy of the report on pendrive/ CD, along with all calculations in MS excel, covering Non Destrictive Test observations analysis,data interpretation,conclusion of NDT observations and visual inspection, drawing out measures for durability make up, estimation of repair quantities (with methodology for carrying out structural repair / retrofitting), along with design & schemetic drawings, rate analysis for major repair items. The report should consist of each structure seprately and all together constitute one job.

Providing and fixing double tubular scaffolding system using H- frames with cup lock type on the exterior side upto seven story height made with 40 mm dia M.S. tube 1.5 m centre to centre horizontal and vertical tubes joining with cup and lock system with M.S. tubes, M.S. tube challies, M.S clamps and M.S staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for the required duration as approved and removing it thereafter. The scaffolding sys tem shall be stiffened with bracings, runners, connection with building etc. wherever required for inspection of work at required locations with essential safety features for the workmen etc. complete as per directions and as approved by the Engineer -in - charge. The elevational area of the scaffolding shall be measured for payment purposes. The payment shall be made once irrespective of duration of scaffolding

KBP Civil Engineering Servises

ESI SERVICES INDIA LLP

Epicons Consultants Pvt Ltd