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    CEMAT Exam Winter (Level 7) 13-14

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    slawek780303
    This document contains information about an exam for a Civil Engineering course, including instructions to candidates and 5 exam questions. The exam is for the subjects of Civil Engineering Materials and is being administered at the Institute of Technology in Sligo, Ireland in the winter of 2013/2014 academic year. The exam will last 2 hours and candidates must answer 4 out of the 5 questions provided.

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    CEMAT Exam Winter (Level 7) 13-14

    Uploaded by

    slawek780303
    48 views5 pages
    This document contains information about an exam for a Civil Engineering course, including instructions to candidates and 5 exam questions. The exam is for the subjects of Civil Engineering Materials and is being administered at the Institute of Technology in Sligo, Ireland in the winter of 2013/2014 academic year. The exam will last 2 hours and candidates must answer 4 out of the 5 questions provided.

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    This document contains information about an exam for a Civil Engineering course, including instructions to candidates and 5 exam questions. The exam is for the subjects of Civil Engineering Materials and is being administered at the Institute of Technology in Sligo, Ireland in the winter of 2013/2014 academic year. The exam will last 2 hours and candidates must answer 4 out of the 5 questions provided.

    Copyright:

    © All Rights Reserved
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    48 views5 pages

    CEMAT Exam Winter (Level 7) 13-14

    Uploaded by

    slawek780303
    This document contains information about an exam for a Civil Engineering course, including instructions to candidates and 5 exam questions. The exam is for the subjects of Civil Engineering Materials and is being administered at the Institute of Technology in Sligo, Ireland in the winter of 2013/2014 academic year. The exam will last 2 hours and candidates must answer 4 out of the 5 questions provided.

    Copyright:

    © All Rights Reserved
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    of 5

    INSTITIÚID TEICNEOLAÍOCHTA, SLIGEACH

    INSTITUTE OF TECHNOLOGY, SLIGO


    School of Engineering
    Head of School: Mr. Shane Fanning

    Exam Series: WINTER Academic Year: 2013/14

    Course: BACHELOR OF ENGINEERING IN CIVIL ENGINEERING


    (LEVEL 7)
    BACHELOR OF ENGINEERING IN ENVIRONMENTAL
    ENGINEERING
    (LEVEL 7)

    Stage: 2

    Subject: CIVIL ENGINEERING MATERIALS

    Internal
    Examiner(s): Kathryn Ryan

    External Mr. Desmond Walsh


    Examiners: Mr. Francis Fidgeon

    Instructions to Candidates

    Time Allowed: 2 hours

    Number of Questions on Paper: 5

    Number of Questions to be attempted: 4

    Compulsory Question: None


    Civil Engineering Materials Winter 2013
    Any Other Special Instructions: None

    QUESTION 1

    (a) What are the typical proportions of the various constituents in a concrete mix?
    (2 marks)

    (b) In relation to cement production, answer the following questions;


    (i) Why are limestone and shale used? (7 marks)
    (ii) In what proportions are the limestone and shale combined?
    (1 mark)
    (iii) Why and when is gypsum added? (3 mark)
    (iv) How is the cement industry endeavouring to ensure that cement production
    becomes more sustainable? (3 marks)

    (c) Describe clearly how a pozzolanic reaction takes place and name any two pozzolanic
    materials which are commonly used in concrete production.
    (9 marks)

    QUESTION 2

    (a) Explain the term water/cement ratio. (6 marks)

    (b) Distinguish between the consistence and cohesiveness of fresh concrete.


    (4 marks)

    (c) You are supervising the pouring of a large floor slab when you observe that the
    concrete has a tendency to bleed when it is being placed and compacted.
    Suggest some modifications which could be made to the next delivery to
    reduce this tendency. (3 marks)
    (d) During the course of your laboratory work, you carried out a number of
    experiments which involved investigating how consistence is influenced by the
    various concrete constituents. Describe how you carried out one of these
    experiments and the results obtained. (12 marks)

    Page 2 of 5
    Civil Engineering Materials Winter 2013

    QUESTION 3

    (a) A concrete cylinder measuring 100mm in diameter by 200mm high was tested in a
    compression test and the maximum force carried was 364kN. Determine the
    compressive strength of the cylinder in the appropriate units.
    (2 marks)
    (b) Explain how each of the following influences concrete strength;
    (i) degree of compaction
    (ii) surface texture of aggregate (6 marks)

    (c) Identify two other factors which influence concrete strength. (2 mark)

    (d) Explain why concrete shrinkage occurs and why it is undesirable in hardened
    concrete. (5 marks)

    (e) What is the significance of the passivation layer which forms on steel in reinforced
    concrete and explain how it may be destroyed? (10 marks)

    QUESTION 4

    (a) Distinguish between barrier and cathodic protection.


    (4 marks)

    (b) Describe the hot-dip galvanising process. (11 marks)

    (c) Explain the significance of the following equation

    % Mn %(Cr  Mo  V ) %( Ni  Cu )
    CE %C   
    6 5 15
    (5 marks)
    (d) You have been asked to advise on the potential durability of a proposed metal
    cladding for a public building in your town.
    What factors should you consider in making this assessment?
    (5 marks)

    Page 3 of 5
    Civil Engineering Materials Winter 2013

    QUESTION 5

    (a) What are geosynthetics and what functions do they fulfil?


    (3 marks)

    (b) Describe the most common types of geosynthetics. (14 marks)

    (c) Suggest a suitable geosynthetic material for each of the following scenarios;

    (i) separation of the subgrade and roadbase in paved roads


    (ii) gabions for erosion control structures
    (iii) water drainage behind retaining walls
    (iv) primary or secondary liners in landfills
    (v) radon control beneath buildings
    (vi) reinforcement of embankment fills and earth dams
    (vii) waterproofing tunnels
    (viii) improving bearing capacity of shallow foundations
    (8 marks)

    Page 4 of 5
    Civil Engineering Materials Winter 2013

    Page 5 of 5

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