8th Semester (July-2016) Civil Engineering Question Paper

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Eighth Semester B.E.
Advanced
Time: 3 hrs.
Degree Examinationo June/July 2016
Goncrete Technology
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a. Explain the factors affecting the mix design of concretes.
b. Design a concrete mix of Mzs grade for the following data:
Max size of aggregate * 20 mm; Crushed angular
Min/max cement content - 30Ol45O kg/m3; Max WC * 0.5; Exposure condition - Moderate;
Work ability - 100 mm slump; Method of placing - pumping; Quality control - good;
Type of chen:ical admixture - Super plasticizer fSpecific gravity - 1.T41.
Assume 25.a/a replacement of cement by fly ash.
Test data for materials:
i) Cerrient - OPC 43 grade IS 8112.
ii). Specific gravity of cement - 3.15
iii) Fly ash-20o/o Cementations material
, iv) Specific gravity of fly ash_ 2.20
, v) Specific gravity of coarse aggregate -2.60
vi) Specific gravity of flrne aggregate - 2.65
[belongs to zone II]
Assume any other data suitably.
Explain the influence of w/c ratio and age on permeability of concrete.
Max. Marks:100
(05 Marks)
(15 Marks)
(07 Marks)
Discuss in brief alkali aggregate reaction. What precautions are necessary to minimize?
(06 Marks)
c' What is sulphate attack? Explain briefly the methods of controiling sulphate attack.
(07 Marks)
{€*,dv
Note: l. Answer FIVE full qaestions, selecting
at least TWO qaestionsfrom each part.
2. Missing data may be saitably assumed
3. Use of IS: 10262 - 2009 is permitted
PART _ A
I a. Enumerate the importance of Bogue's,compounds in ordinary port land cement. (06 Marks)
b. Explain briefly rheology of concrete. What are the factors affecting the rheology of
concrete? (07 Marks)
c. What are the factors affecting strength and elasticity of concrete? (07 Marks)
2 a. Explain the rnechanism of 'deflocculation' of cernent particles by super plasticizers with
neat sketches. (07 Marks)
b. What is optimum dosage of super plasticizer? How do you determine the optirnum dosage of
super plasticizer? (07 Marks)
c. What are mineral admixtures? Explain briefly, i) Silica flume ii) G.G.B.S. iii) Fly ash.
(06 Marks)
I of2

2. a
10cv81
a. what is R.M.c? Exprain briefly uor#ffi.M.c.
b. Exptain shorr crete and under water concreting. [:ffi113c' what is self compactngconcrete? what are tie advantages of self compacting concrete?
(06 Marks)
a' What are the different types of fibres used in concrete? what factors effecting properties offibre reinforced concrete? "'.,,6[#"r.rib' What is aspect ratio? How does it influence strength and toughness of FRC ? ",, (04 Marks)c' what is Ferro cement? List the various applicatioirs of Ferroiement.
. ,: (08 Marks)
a. Write short notes on:
i) Light weight concrete.
ii) High density concrete.
b. What is 'High performance
Performance Concrete?
c. Discuss in briefthe properties of High performance concrete
Explain the following:
a. Tests on hardened concrete.
b. Rebound Flamrner Test [NDT].
c. Pulse Velocity Test tI.,fDTl.
Concrete' [HPC]? What aro",,tiie applications
(06 Marks)
of High
(06 Marks)
in fresh and hardened state.
(08 Marks)
(08 Marks)
(06 Marks)
(06 Marks)
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3. 10cv82USN
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Eighth Sernester B.E" Degree Examination, "lune/July 2016
Design & Drawing of Steel Structures
Time: 4 hrs.
Note: l. Answer any oNElailquestionsfrom r*"n rr*{ax'
tvtartcs:f o!
2. Use IS: 800-2007 and steel tsble are pernaitted-
3. Missing data, if,any may be suitab,ly assarmed.
PART _ A
1 a. A cross beam ISLB-350 @ 495 Nim is connected to a main beam ISMB-500 @ 869 Nim.
The top of the flanges are at same level. The framed connection has the following details:
i) Frarne angle - 2 iSA 150 x 1 15 x 10 @ 200 N/m.
il) The connection between the cleat angle leg of 115 mm and web of the cross beam is
5 mm filiet weld of length 250 mm.
iii) The connection between the cleaf angle leg of i50 mm.and web of the main beam is
8 mm fi1let weld of length 250 mm.
iv) The clearance between cross bearn and web of main beam is i0 mm.
Draw to a suitable scale:
* Front view and
, Side view with all details. (15 Marks)
b. The design stiffened seated connection has the following details:
i) ISHB-300@630 N/m transmits an end reaction of 80 kN to the flange of column section
ISHB-250 @ 547 Nlm.
it) Seat angle ISA 100 x75x8 mm at 105 N/rn, 100 rnm along horizontal.
iii) Stiffening angle 2ISA90x90x8mm at 108 Nirn.
iv) Cleat angle at top trSA 75x75 x 8 mm at 89 N/rn. Cornect 2 - 18 mm dia in each leg.
v) Bolts connecting the stiffening angle with the column flange are 8 - 20 mm dia. IISFG
bolts at a pitch of 60 mm ClC,4 bolts in each row.
vi) Stiffening angle are tack bolted.
Use 2 - 18 mm dia bolts.
Draw to a suitable scale:
* Front elevation
{. Side view. (15 Marks)
2a. A built up column is composed of 2ISLC-350@388 N/m placed back to back at clear
distance of 220 mm. The colunrn is provided with single lacing system consisting of 60
ISF12 mm at 45o and is connected by a 20 mm dia bolt at each end. The channels are
supported over a slab base 600 x 450 x 50mm. The angles connecting column and base plate
is ISA 100.x 100 x 10 mm and are connected by 2-20 mm dia on each leg. Draw to a suitable
scale:
i) Sectional elevation. ii) Plan of slab base assernbly with all details. (15 Marks)
Draw to a suitable scale the elevation and plan of the colurnn splice having the following
details:
i) Bottom column : ISHB - 300 @ 630 Nim ii) Top colupn : ISHB -200 @ 400 N/m
iii) Splice plate : 8 mm thick iv) Bearing plate : 50 mm
v) Use 8 - 20 mm dia on each side of the joint in two rows of 4 bolts each for connecting
flanges of the columns to flange splice piate.
Draw to a suitable scale :
* Sectional elevation
, Side view with details.
I of2
(15 Marks)

4. 10cv82
PART _ B
3 A simply supported welded plate girder for an effective span of 30 m and a udl of 30 kN/m
and two concentrated load of i50 kN each acting at 10 m from both ends. It is fully
restrained against lateral buckling throughout the span. Design the central section using thin
web with K : 100 and end bearing stiffner. Also design the welded connection between
flange and web. Take fy : 250 MPa, fu : 415 MPa and ultimate stress of weld : 410 MPa.
a.
b.
c.
a.
b.
c.
Also design curtailment of plate.
Draw to a suitable scale:
Elevation for fulI span with discontinuous line.
C/S at support and midspan.
Pian for fi.rll span with discontinuous line.
(40 Marks)
(10 Marks)
(10 Marks)
(10 Marks)
(40 Marks)
(05 Marks)
(10 Marks)
(15 Marks)
Design a simply supported crane girder for the following data. The girder is electrically
op.rat.d. Taki yieldstress of steel is 250 N/mm2. Use 16 mm dia. Bohs of grade 4.6.
i) Capacity of crane : 250 kN
il) Weight of crab (Trolley) : 80 kll.
ii| Weight of crane girder excluding trolley : 300 kN
iv) Span of the crane girder: lB m.
v) Minimum hook approach: 1.0 m
vi) Wheel base:3.0 m
vii) Span of gantry girder: 6 m
viii) Weight of rail section :0.25 kN/m
ix) Take !:250 l/IPa.
Draw to a suitable scale showing all details:
Plan of G.G.
Front view
Cross section of Gantry Girder.
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5. USN
10cv833
(05 S{arks)
(06 Marks)
(06 &[arks)
{05lVtarks)
Tirne: 3 hrs. N{ax. Marks:100
PAR.T - A
I a. Describe the desirable properties of pavements. (06 Marks)
b. Explain the strategies adopted in pavement design. (06 Marks)
c. Bring out the characteristic diflbrences between flexible and rigid pavements. (08 Marks)
Pavement Design j'"i
Note: Answer any FIVE fwll qwestions, selecting
atleast TWO questions frotn euck p*rt.
Explain frost action. What are the remediai measures?
List the assumptions and limitations of Boussinesquis Theory.
of pavement.
b. Describe the procedure of calculating ESWC by equal deflection criteria.
2a.
b.
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A dual wheel ioad assembly with 70 kN load on each wheel and contact pressure of
0.7 N/rnm2 is applied on a homogene'ous mass with modulus of enasticity 12 N/rnm2. If the
centre to centre distance between the two wheels is 600 mm, determine the deflection value
at a depth of 0.5 m at four points, at the centre of dual wheels, and at rudial distances of 300,
600 and 900 mrn from this centre along the line joining centers of the two wheel loads. Use
deflection factor chart Fig. Q2(c). (08 Marks)
Fig. Q2(c)
3 a,. With a sketch, describe the significance of design wheel load and contact pressure in design
o. Calculate design repetitions for 20 years period for various wheel loads equivalent to
22.68 kN wheel load. usins the follo dat four lane road. (08 Marks), usrng tne rollowrng lrarilc su a on a lour lane
Wheel load, kN
Average daily traffic
(both) directions
o/o
of totaltraffic
volume
22.68
Total volume
considering traffic
growth : Zl5
13.17
27.22 1s.30
31.7 5 1 1.36
36.29 14.11
40.82 6.21
4s.36 5.84
I of 2

6. 10cv833
a. Expiain with exarnples, how are the flexible pavement design methods classified. (06 Nlarks)
b. Design a highwa.y pavement
^usin,g
Vlcieod's method for a wheel load of 57 kN (5100 kg)
and tyre pressure 0.53 N/mm' (A.Z kgicm2). The subgrade support frorn repeated plate load
test using 300 mm (30 cm) diameter piate was 14.30 kN (1430 kg) at 5 mm (0.5cm)
deflection. Assume base course constant as 90.
c. Design the pavement by triaxial rnethod using the following data:
V/heel load :51 kN
Radius of contact area : i50 mm
(06 Marks)
(08 Marks)
(10 Marks)
(10 Marks)
(10 Marks)
Traffic coefficient
Rainfall coefficient
Design defiection
: 1.5
:0.9
:2.5 mrn
,, PART _ B
a. What is warping stress? With a sketch explain how warping stresses are developed in CC
pavernents. (06 Marks)
b. Write a note on :
i) Critical load positions
i0 Critical conabination of stresses. (0f Marks)
c. A CC pavement, 200 rnrn thick, has longitudinal joints at 3.5 m and transverse joints at
4.5 mspacing" T'he modulus of subgrade reaction is 0.1N/mm3 and rnodulus of elasticity of
CC is 3 x 104 N/mrn2. Find the wheel load stresses at edge and corner regions of the slab due
to wheel load of 5tr kN with radius of contact area 150 mm. (08 Marks)
a. The maximum increase in temperature is expected to be 26"C after the constructions of a CC
pavement. If the expansion joint gap is 22 rntn, design the spacing between expansion and
plain contractionr joints. Assume all other data suitable. (06 Marks)
b. A CC pavernent 288'"mm thick and I .5 mwide has a longitudinal joint along the centre iine.
Design the diameter length and spacing of tie bars if permissible stream in steatr is
140 N/mm2snd coefficient of frictionis 1.2. Assume unit weight of concrete as 24000 N/m3.
(06 Marks)
c" Describe,the step by step procedure in design of dowel bars. Indicate the equation used.
(08 Marks)
a. Explain the typical flexibie pavement failures with respect to their causes. (10 Marks)
b. Explain the step by step procedure of conducting Benkelman beam deflection studies in the
field on a stretch of ftrexible pavement for providing flexible overlay. What are the necessary
E - value of subgi:ade soil : 10 N/mm2
E - value of base course rnaterial : 40 N/mm2
E - value of 75 mm ttrick bituminous concrete surface : 100 N/mrn2.
corrections to be applied?
^.
Explain the foilowing with respect to rigid pavement :
i) Scaling of cement concrete
ii) Spaltring ofjoints
ii, Mud pumping.
b. Explain the following in rigid pavements :
i) Treatment of cracks
ii) Maintenance of.joints.
*****
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Environrmental lmpaet Assessilment
Time: 3 hrs.
Note: Answer FIF/E f,alt qwestioms, selecting
at lesst TW{} qwestions from each part"
PART:*A
a. Define EIA and explain relationship between EIA, EIS and FOidStr.
b. Explain iri brief baseline information in EIA.
2 a. Explain the following :
i) Need for EIA studies .,
ii) Liniitations of EiA
'b. Explain in detail, the step by step procedure for conducting EiA.
10cv847
Max. Marks:'lt}{i
(10 &[arksi
(10 Marks)
(08 Marks)
(12 Marks)
(1S Mart<s)
(1S &6arks)
(?CI lVlarks)
a. Explain any 2 methodologies used in EIA. (10 Marksi
b. Define environment setting. List the rna.jor environment components to be considered during
4a.
b.
EIA and expiain any one of them.
Explain the basic step fbr prediction and assessment of impact on water.
Discuss the various steps involved in assessrnent and prediction of impact on air attt'ibute.
{XE Marks}
P_AR.T'-"B
5 a. Differentiate between REIA anei CEL{. List the brief contents of REIA. (10 Marks)
b. Bring out clearly tlee guideiines of EIA for a development project substantiate with an
example. (i0 Marks)
6 a. What is the importance of public participation in environinental decision making? State the
advantages and disadvantages of public participation. (10 Marks)
b. Outtru:e the salient features of project activity and environmental pararneters relationship.
(10 Marks)
7 Briefiy explain assessment procedure in the following activities.
i) Highway project
i' -,, ii) Thermal power plants.
I Write short notes on any 4 of the following :
a. Socio-economicimpactassessment
b. E{A process in india
c. DEIA and FE{A
d. Environrnental impact of Nuciear power plants
e. Environment impact rnairices.
&**+*
(20 Marks)