Reinforcement Cover: It is essential that the steel reinforcement bars are surrounded sufficient impermeable concrete to protect them from corrosion, and to allow the combined strength of the reinforcement and concrete to be effective. From the diagram above, we can see how the process unfolds. When the binding has set, the steel bars are placed(…)
Reinforcement Guide
REINFORCEMENT CORROSION-CAUSES & PREVENTION
REINFORCEMENT CORROSION-CAUSES & PREVENTION The corrosion of steel reinforcement is complex, but basically it is an electro-chemical reaction similar to that of a simple battery. The composition of mild steel varies along its length and potential anodic (more negatively charged) and cathodic (positively charged) sites can be set up at various points. Concrete is capable(…)
SPACING OF REINFORCEMENT IN RCC MEMBERS
Spacing of Reinforcement in reinforced concrete members: Minimum Spacing between Bars in Tension The minimum horizontal spacing between two parallel main bars shall be diameter of larger bar or maximum size of coarse aggregate plus 5 mm. However, where compaction is done by needle vibrator, the spacing may be further reduced to two-third of the(…)
CURTAILMENT OF REINFORCEMENT IN FLEXURAL MEMBERS
Curtailment of Tension Reinforcement in Flexural Members To economise the design of a flexural member, the tensile bars are curtailed at the section beyond which it is no longer required to resist flexure. Such curtailed bars are extended for a distance equal to 12 or effective depth, whichever is greater, except at simple support or(…)
CONCRETE REINFORCEMENT DETAILING REQUIREMENT
Reinforced concrete is a composite material, hence a proper bond between the two materials – concrete and reinforcement – is the first requirement. A minimum length of reinforcing bar is needed to develop the full bond strength between concrete and steel. This length is expressed in terms of development length. ‘Development length’ on each side(…)
PREPARATION OF BAR BENDING SCHEDULE
Preparation of Bar Bending Schedule Bar bending schedule (or schedule of bars) is a list of reinforcement bars, vis-à-vis, a given RCC work item, and is presented in a tabular form for easy visual reference. This table summarizes all the needed particulars of bars – diameter, shape of bending, length of each bent and straight(…)
PROTECTION OF REINFORCEMENT AGAINST CORROSION
The protection of reinforcement against corrosion can be done by any of the following method: a) Anticorrosive treatment using acid / alkali / other agents based on CECRI technology (as per IS: 9077). b) Fusion bonded Epoxy coating (as per IS:13620). c) Corrosion resistant reinforcement as rolled in the factory and commercially available. Anticorrosive treatment(…)
LIST OF IS CODES ON REINFORCEMENT
LIST OF IS CODES ON REINFORCEMENT: 1. IS:432 – Mild steel & medium tensile steel bars and hard drawn steel wires for concrete reinforcement : Part-II -Hard drawn steel wire. 2. IS:1786 - Specification for High strength deformed steel bars and wires for concrete reinforcement. 3. IS:2502 - Code of practice for bending & fixing(…)