Chemical Analysis — Reinforcement Bars & Wires
(IS 1786 — Rebar Chemical Composition)
Chemical composition testing of TMT reinforcement steel bars and wires per IS 1786:2008 — verifying C, Mn, S, P, Si and Carbon Equivalent for grade compliance, weldability and seismic (D grade) application suitability.
What is the Chemical Analysis — Reinforcement Bars & Wires?
Reinforcement Steel Bar Chemical Analysis per IS 1786:2008 verifies that TMT rebars have the correct chemical composition for their specified grade (Fe 415, Fe 415D, Fe 500, Fe 500D, Fe 550, Fe 550D, Fe 600). IS 1786 specifies maximum C, S, P and S+P limits, plus Carbon Equivalent (CE) and Carbon Equivalent (CEV) limits — particularly important for seismic 'D' grade rebars where ductility is critical.
At Global Lab, rebar chemical analysis by OES simultaneously determines C, Mn, S, P, Si, Cr, Ni, Cu, V — with Carbon Equivalent CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 calculated per IS 1786. Chemical analysis detects low-quality re-rolled steel that may pass visual inspection but fails IS 1786 composition limits — especially important for projects in seismic zones (IS 1893) requiring Fe 415D or Fe 500D grades.
Non-Destructive
Fast Turnaround
NABL Certified
Pan-India Coverage
Digital Reporting
High Accuracy
Chemical Analysis — Reinforcement Bars & Wires — Site Images
How the Chemical Analysis — Reinforcement Bars & Wires is Conducted
-
1
Surface Preparation
A shallow groove (approx. 25mm deep) is cut into the concrete surface using a diamond-tipped cutting tool. The surface is cleaned of dust and debris. -
2
Insert Disc Placement
A specially designed steel insert disc is placed into the groove. A thin rod connects the disc to the pullout apparatus above the surface. -
3
Hydraulic Pullout Force Application
A hydraulic jack applies a steady, controlled pullout force to the insert disc via the reaction ring resting on the concrete surface. -
4
Failure Load Recording
The maximum force at which the concrete cone is extracted is recorded. A digital load indicator provides real-time readings with data logging. -
5
Strength Calculation & Reporting
The pullout force is correlated to cube compressive strength using established calibration curves. NABL-accredited reports are issued via Autovity QLMS.
Applicable Test Standards
| Standard | Title | Scope | Type |
|---|---|---|---|
| IS 1786:2008 | High Strength Deformed Steel Bars and Wires for Concrete Reinforcement — Specification | TMT Rebar | Indian Standard |
| IS 6285 | Methods for Chemical Analysis of Carbon and Low Alloy Steels | Test Method | Indian Standard |
| IS 1893 | Criteria for Earthquake Resistant Design of Structures | Seismic Design | Indian Standard |
| ASTM A615 | Standard Specification for Deformed and Plain Carbon-Steel Bars | Reference Standard | ASTM |