Complete Alkali-Aggregate Reaction notes: 3 types (ASR, ACR, ASiR), ASR mechanism 6 steps, SiO₂+NaOH gel formation, 3 essential conditions triangle, reactive aggregates table, map cracking symptoms, IS 456 Cl.5.4.1 (3 kg/m³ limit), fly ash/GGBS prevention, AAR test methods (ASTM C1260, C1293), and exam FAQs.
Complete corrosion of reinforcement notes: passive film protection, electrochemical mechanism (anode Fe→Fe²⁺, cathode O₂ reduced), carbonation-induced (x=k√t, pH drop), chloride-induced (pitting, Fick’s law), IS 456 cover table (20–75mm), effects (cracking, spalling, section loss), prevention methods.
Complete notes on Causes of Deterioration of Concrete: physical (freeze-thaw, abrasion, thermal, shrinkage, cavitation), chemical (carbonation x=k√t, chloride, sulphate, AAR, acid), mechanical, biological, construction defects, IS 456 Table 3 exposure classes, and exam FAQs.
Complete Quality Assurance Tests notes: fresh tests (slump, CF, Vee-Bee, flow table), hardened tests (cube IS 516, split tensile IS 5816, flexural MoR), sampling frequency (IS 456 Table 14), acceptance criteria (Cl.16), failure action sequence (core test → load test), and exam FAQs.
Complete RMC notes: definition, 3 types (transit mix, central mix, shrink mix), step-by-step plant to site process, IS 4926:2003 requirements (90 min limit, slump tolerance ±25mm, batching tolerances), quality control at plant and site, advantages vs limitations, and exam FAQs.
Complete Core Cutting Test notes: definition, when required (IS 456 Cl.17.4), equipment, IS 516 Part 4 procedure, h/d correction factors table, IS 456 acceptance criteria (avg ≥0.85fck, min ≥0.75fck), core vs cube strength comparison, and exam FAQs.
Complete FRC notes: definition, 4 types of fibres (steel, glass AR, PP, carbon), crack bridging mechanism, aspect ratio, fibre volume fraction, properties improved (toughness ↑200-600%, flexural ↑30-80%), mix design, balling prevention, and applications in tunnels, industrial floors, and fire-resistant structures.
Complete UPV Test notes: definition, principle (V=L/T), 3 transmission modes (direct, indirect, semi-direct), IS 13311 Part 1 procedure, pulse velocity quality table (>4.5 to <2.0 km/s), factors affecting UPV (reinforcement, moisture), SONREB method, and exam FAQs.
Complete Lightweight Concrete (LWC) notes: 3 types (lightweight aggregate, aerated/AAC, no-fines), density classification table (300-1840 kg/m3), AAC block manufacturing process, thermal conductivity comparison, modulus of elasticity formula (ACI 318), IS 9142 and IS 2185, and applications.
Complete Rebound Hammer Test notes: definition, working principle (Schmidt Hammer), IS 13311 Part 2 procedure (9 readings, outlier rejection), Rebound Number vs quality table, factors affecting R (carbonation warning), angle correction table, and exam FAQs.
