# Concrete technology

- Introduction
- Coarse and fine aggregates
- Methods of design of RCC structures
- Codes used in RCC design
- Grades of concrete and steel
- Frequently asked questions
- Workability of concrete
- Water cement ratio strength and grade of concrete
- Mix proportion: Objects and methods
- Limit state design
- Beam: Types, reinforcements and analysis
- Moment of resistance and modes of failure
- Understanding the design steps
- Modes of failures of RC beams
- Forms and designs of shear reinforcement
- General requirements in slab design
- Steps for design of sunshade
- Understanding the neutral axis and dimensions of T beams
- Moment of resistance and cases
- Design of continuous beams
- Reinforcement details
- Types of stairs
- Effective span of stairs
- Distribution of loads on flights
- Working stress method
- Types of beams
- Understaning various tems

The presentation is based on concrete and starts with the objectives of the presentation and moves onto a review of the composition of concrete. It then moves towards RCC structures and covers points like methods used in the designing of RCC structures, the codes used and the functions of reinforcement. The topics covered after these are the grades of concrete, the workability of concrete, the water content of concrete and the different tests that concrete must pass. The next topic in the presentation is the different pacing conditions according to IS 456-2000 which is followed by the water and cement ratios and the strengths and grades of concrete. After this is covered Concrete mix and its types followed by various methods used for determining the life and strength, like the Limit State Method(LSM), of concrete. What follows this is an explanation of the technicalities of the strength of this material by looking at the stress strain curve, stress block parameters, calculations of how much load can be taken by the material, etc. The information that follows this is the modes of failures of RC beams followed by the effective span for a cantilever slabs along with an explanation of the different types of reinforcement that can be provided. After this will be the turn of the neutral axis and an analysis of the three cases that arise due to the position of the base after which will be covered the design of the continuous beams. The concluding topic will be that of the design of effective stairs covering points like the types of stairs, components of a staircase, the requirements of good staircase, longitudinal span of the stairs and load calculations.

[...] of reinforcing steel Grades of concrete Grades of steel Concrete (Review) What are the ingredients of concrete? Coarse Aggregate 4.75 mm) Fine Aggregate 4.75 mm) Cement ( Binding Agent ) Water (Potable) COARSE AGGREGATES Quality of Coarse Aggregate Gradation ( Well/ Poorly graded) Shape (Triangular/ Rounded) Durable Chemically inert. FINE AGGREGATES Quality of Fine Aggregate Grade (Coarse/Medium/Fine) Bulkage Free from deleterious materials CEMENT Function in Concrete-acts as binding material Types-OPC, Rapid hardening, sulphate resisting, PPC, Hydrophobic, Expanding, High alumina, Quick setting, High strength cement. [...]

[...] TU = CU 0.87 fy Ast = 0.36 fck xu,max b Ast = 0.36 fck xu,max 0.87 fy The reinforcement (Ast) so computed as above should be equal to or more than minimum reinforcement of of gross area for mild steel bars and of gross area for HYSD bars Calculate the minimum area of the steel to be provided for distributors (Asd) which is equal to of gross area for mild steel bars and of gross area for HYSD bars Calculate the spacing of distributors of dia ?Ø' from the relation s=(AØ/Asd)1000 Where AØ=area of distribution of reinforcement bar The c/c spacing adopted should not exceed the least of 5d 450mm Calculate nominal shear stress Vu/ bd Refer Table 19 of IS:456 for minimum design strength of concrete Table 20 of IS:456 for maximum shear stress in concrete max) and clause for the value of ?k' Sunshades are safe against shear and no shear reinforcement is provided since will be much less than k. [...]

[...] Aligizaki AA 603.1 AA 603.1 Concrete technology Objectives On completion of this class, you will be able to State the codes used for RCC design Explains the functions of reinforcing steel Grades of concrete Grades of steel Concrete (Review) What are the ingredients of concrete? Coarse Aggregate 4.75 mm) Fine Aggregate 4.75 mm) Cement ( Binding Agent ) Water (Potable) COARSE AGGREGATES Quality of Coarse Aggregate Gradation ( Well/ Poorly graded) Shape (Triangular/ Rounded) Durable Chemically inert. FINE AGGREGATES Quality of Fine Aggregate Grade (Coarse/Medium/Fine) Bulkage Free from deleterious materials CEMENT Function in Concrete-acts as binding material Types-OPC, Rapid hardening, sulphate resisting, PPC, Hydrophobic, Expanding, High alumina, Quick setting, High strength cement. [...]