(SEM V) THEORY EXAMINATION 2022-23 CONCRETE TECHNOLOGY

Course: B.Tech (Semester V)                                                     Subject Code: KCE-051

Subject Name: Concrete Technology                                       Time: 3 Hours

Total Marks: 100

Note: Attempt all sections. If any data is missing, assume suitably.

Section A – Short Answer Questions (2 × 10 = 20 Marks)

Attempt all questions briefly:

Role of gypsum in cement manufacturing          Types and grades of Ordinary Portland Cement (OPC)

Use of workability agents                                  Effect of air-entraining admixtures

Why weigh batching is preferred over volume batching

Use of needle vibrator in compaction                Meaning of coefficient of variation

Objectives of mix design                                    Tests for workability of self-compacting concrete

Difference between High-Strength and High-Performance Concrete

Section B – Descriptive Questions (10 × 3 = 30 Marks)

Attempt any three:

Hydration process of cement in detail                    Bonding admixtures and their use in retrofitting

Factors affecting workability of concrete

Define and explain standard deviation, coefficient of variation, and mean strength

Fiber Reinforced Concrete (FRC) – properties and applications

Section C – Long Answer Questions (10 × 5 = 50 Marks)

Q3

(a) Characteristics of aggregates                 or             (b) Suitability of any three types of cement

Q4

(a) Role of accelerating and retarding admixtures       or        (b) Effect of pozzolana on concrete quality

Q5

(a) Methods of transporting concrete from mixing to deposition
or
(b) Objectives and methods of compaction of concrete

Q6

(a) Design a concrete mix (M30) using IS 10262:2019 with given parameters (aggregate type, exposure, workability, etc.)
or
(b) Design mix for M30 grade concrete for an elevated water tank with specific data (slump, specific gravities, exposure, etc.)

Q7

(a) Ready-Mix Concrete (RMC) – uses, limitations, and future scope
or
(b) Self-Compacting Concrete (SCC) – properties and applications