Concrete Resources (21 guides)

Understand concrete grades from M5 to M40, including compressive strength, nominal mix ratios, PCC and RCC applications, curing, cost, and best grade selection.

Understand concrete mix ratios such as 1:2:4, 1:1.5:3, 1:3:6, 1:4:8, and 1:5:10, including grades, uses, water-cement ratio, curing, and cost.

Understand water-cement ratio in concrete, including formula, recommended W/C values, strength and durability effects, water per cement bag, exposure limits, and common site mistakes.

Understand M20 concrete, including 20 MPa strength, 1:1.5:3 nominal mix ratio, common RCC applications, standards, curing, compaction, mistakes, and site checklist.

Understand concrete curing methods, recommended curing periods for OPC, PPC, RCC members, slabs, columns, footings, hot weather concrete, and why curing affects strength and durability.

Understand concrete cover thickness for RCC slabs, beams, columns, footings, water tanks, retaining walls, cover blocks, corrosion protection, fire resistance, and common site mistakes.

Understand common RCC slab thickness values for residential rooms, roof slabs, larger spans, commercial floors, and industrial applications, including span guidance, standards, concrete volume, cover, reinforcement, and curing.

Understand common RCC beam sizes for residential construction, including 230 x 300 mm, 230 x 375 mm, 230 x 450 mm, 300 x 450 mm, and 300 x 600 mm beams, span guidance, cover, reinforcement, concrete volume, and common mistakes.

Understand common RCC column sizes for residential buildings, including 230 x 230 mm, 230 x 300 mm, 300 x 300 mm, 300 x 450 mm, and 450 x 450 mm columns, floor guidance, cover, reinforcement, seismic design, and common mistakes.

Understand RCC footing sizes and thicknesses for residential construction, including isolated, combined, strap, and raft footings, soil bearing capacity, footing depth, PCC, concrete cover, and common site mistakes.

Understand the difference between 20mm and 40mm coarse aggregate for concrete. Covers IS 456 size rules, workability, strength, cost, typical applications, and when to use each size.

How to calculate aggregate quantity for any construction project. Covers estimation methods, bulk density, wastage, compaction, IS 383 and IS 2386 standards, unit conversions, and worked examples for concrete, sub-base, backfill, and drainage.

Complete aggregate sizes reference chart for construction. Covers IS 383:2016, ASTM C33, and BS EN 12620 size designations for fine and coarse aggregate — with sieve sizes, nominal sizes, application suitability, and selection guidance for concrete, road sub-base, drainage, and landscaping.

Step-by-step slab shuttering (formwork) process — prop layout, primary and secondary beam erection, deck sheeting, edge formwork, safe prop spacing, and re-propping practice.

Step-by-step beam shuttering process — bottom (soffit) formwork, side panel erection, propping and side-pressure control, junction detailing with slabs and columns, and striking sequence.

Step-by-step column formwork process — rectangular vs circular panel systems, clamping and yoke spacing, plumb and alignment checks, pour rate control, and striking sequence.

Minimum formwork striking (removal) time by element type — columns, walls, beam sides, slab soffits, beam soffits — how temperature and cement type change these periods, and the strength-based alternative to fixed calendar days.

Guide to shuttering oil and release agents — mineral oil, chemical/reactive, and water-based types, how to choose between them, correct application technique, and the surface-finish problems caused by getting it wrong.

How beam depth and spacing determine achievable span, minimum bearing requirements and why they matter, and how to choose between above-deck and void-fitted insulation for a beam and block floor.

Practical guide to RCC lintel sizing — why every opening needs one, bearing length by opening span, depth rules of thumb, main/top bar and stirrup basics, and worked examples for a window and a door lintel.

Practical guide to staircase design — the riser/tread comfort formula, minimum headroom clearance, waist slab thickness rules of thumb, the steps-vs-step-blocks convention, and worked examples for a straight flight.