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Ce 2206: Civil Engineering Materials One Question Paper

Ce 2206: Civil Engineering Materials One

Course:Bachelor Of Science In Civil Engineering

Institution: Dedan Kimathi University Of Technology question papers

Exam Year:2011

KIMATHI UNIVERSITY COLLEGE OF TECHNOLOGY
2010/2011 ACADEMIC YEAR UNIVERSITY EXAMINATIONS
SECOND YEAR FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN CIVIL ENGINEERING

ECE 2206: CIVIL ENGINEERING MATERIALS ONE

INSTRUCTIONS
1 This paper contain five(5) questions.
2 Answer question one and any other two question
3 Question one carries thirty marks while the rest have twenty marks.
4 Question one is compulsory

QUESTION ONE
a) Describe four main functions of mortar in masonry construction (4)
b)Describe using appropriate sketches the manufacture of ordinary Portland cement using wet process (6)
c) In the notes for drawing a reinforced concrete water tank project , concrete was marked as class-3o/20. Explain the meaning of these terms
d) Describe the three aggregate classification criteria
e) Describe two main function of water in a concrete mix
f) Outline:
.Three disadvantage of bleeding in concrete
.three purposes of compacting concrete
.three effects of over vibration of concrete

QUESTION TWO
a) Describe four observation required for quality control of a concrete material in a construction project
b) outline the steps used in design of a concrete mix using the British method of mix design
c) Explain the significance of the following building stone
.porosity
.strength
d) What would be the effect on concrete on increasing
.water/cement ratio
.aggregate/cement ratio

QUESTION THREE
a) Outline any three procedures a structural engineer can use on a construction site to prove on a batch of building stones delivered on the site
b) The government of Kenya encourage the use stabilized soil blocks as a strategy of solving housing problems and adopting the use of low cost materials.Describe the major challenge of the strategy to structural engineers.
c) Distinguish between the following terms as used in specification of concrete materials
.designed mix
.prescribed mix
d) Describe two main objectives of testing aggregates

QUESTION FOUR
a) Define the term characteristic strength of concrete
b) Explain the main importance of concrete curing
c) Describe any five factors affecting concrete compressive strength.

QUESTION FIVE
a) Describe the three properties of concrete which defines workability
b) Outline the precaution undertaken when delivering and storing aggregates to ensure quality of aggregates on a construction site.
c) Outline any five considerations made when placing fresh concrete on site
d) Explain the roles of the following compounds in Portland cement concrete
.Tricalcium silicate
.dicalcium silicate
.tricalcium aluinate

Ce 2206: Civil Engineering Materials One Question Paper

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