Journal of Civil and Construction Engineering (e-ISSN: 2457-001X)

A Comparative Study between RC Frame with Shear Wall and Composite Structure with Respect to RC Frame Using ETABS

2023-10-16T16:41:07+0530

This study investigates the seismic
performance of three high-rise building
structural systems using ETABS software.
These systems have distinct features and
implications in seismic-prone areas.
The first system is a shear wall-less
Reinforced Concrete (RC) structure, favored
in low seismic regions for its cost-efficiency
but of concern in earthquake-prone areas due
to its limited seismic resilience. The second
system involves a strategically designed RC
building with shear walls at structural
corners, enhancing its ability to withstand
lateral seismic forces and reduce potential
structural damage. The third system is a
Composite structure with composite beams
and columns known for their strength and
flexibility. They efficiently distribute seismic
forces, minimizing structural failure risk
during earthquakes.
The seismic analysis subjects these systems to
simulated seismic forces, examining
performance metrics like lateral
displacement, inter-storey drift. A notable
finding emphasizes the significance of shear
walls in high-rise building design. Data
reveals that the RC structure with
strategically placed shear walls exhibits better
seismic performance, particularly in high
seismic risk areas.
Adherence to the Bangladesh National
Building Code of 2020 standards is crucial for
ensuring seismic compliance and
safeguarding lives and structural integrity
during earthquakes. This research
significantly contributes to enhancing seismic
resilience in high-rise buildings, offering
valuable insights for architects and engineers.
It plays a crucial role in creating safer, more
resilient urban environments by advancing
structural designs and construction practices.
In summary, this study underscores the
critical importance of seismic analysis in
high-rise building design and construction,
highlighting the pivotal role of shear walls in
seismic performance, especially in high-risk
regions. Compliant with the Bangladesh
National Building Code of 2020, this research
advances understanding of seismic resilience
and provides practical guidance for architects
and engineers in high-rise construction within
seismic-prone areas, fostering safer urban
landscapes.

Influence of Styrene-Butadiene Rubber Latex Binder in Hybrid Manufactured Sand–Fly Ash Concrete with Different Admixture and Its Mechanical Properties

2023-07-10T16:42:20+0530

The cement-to-m-sand ratios used to produce the mortar mixtures ranged between 1:3 and 1:4 with different dosages of fly ash used for mechanical characteristics. The predominant peaks in the FTIR spectrum indicate the
presence of fly ash, SBR bonding agent and admixture in the concrete motor. Apart from these peaks, MFC3 and MFC5 show some of the other peaks for styrene group stretching, polycarboxylic ether stretching bending in the
plane, the carbonyl group of superplasticizer, stretching of isopropene butadiene. In fly ash mixed concrete, the XRD spectra imply three polymorphs of crystal structure consisting of orthorhombic, triclinic and monoclinic
phases. The addition of various admixtures significantly improved the surface morphology, as seen in the SEM image. The mechanical investigation discovered that as clay percentages grow up to MFC (30 wt %), the compressive strength increases because of the strong adhesion induced by the combination of water reduction and water repellent, which enhances compactness and lowers porosity. Styrene-Butadiene Rubber and polycarboxylate ether were added, which improved the addition of slump flow. After 25 minutes of resting, there was a noticeable
decline in workability.

Engineering Behavior of Soft Soil Stabilized with Quarry Dust and Cement

2023-11-02T18:22:44+0530

The poor geotechnical characteristics of soft
clay soils are worldwide problems that pose
several challenges for extensive damage to
structures if not adequately treated. The
purpose of this investigation was to evaluate
the suitability of quarry dust and cement for
stabilization of Niger Deltaic Marine clay. The
soil sample was classified in the laboratory,
and initial findings indicate that the soil falls
under the AASHTO classification system's A-
7-5 class. The Moisture Content test, Sieve
Analysis test, Atterberg limit test, Specific
Gravity test, Proctor Compaction test, CBR
test, and Triaxial test are a few geotechnical
laboratory tests used to assess the
geotechnical characteristics of the soil. A
concentration of 1% to 5% cement and 0% to
20% quarry dust was used to stabilize the
soil. The analysis showed that the Quarry
Dust and cement increased the maximum dry
density (MDD) of the soil and decreased the
optimum moisture content (OMC). The
additives also improved the CBR but did meet
the minimum requirement for CBR for the
soil in Nigeria. When the additives were
combined, the soil geotechnical properties
improved further. The highest value for CBR
was (14.15%) and cohesion (88kPa) occurred
at 20% quarry dust and 5% cement. The
highest MDD occurred at 20% Quarry Dust
and 5% cement with an MDD value of
1410kg/

Experimental Study on Geopolymer Concrete with Waste Tiles Powder

2023-09-08T15:00:03+0530

While cement is not a green substance, the
concrete industry is presently working toward
creating sustainable concrete, employing industrial
by-products to partially replace cementitious
ingredients. To replace cement, the
creation of eco-friendly concrete is facilitated
using industrial wastes in geopolymer concrete
(GPC), which also encourages waste
recycling. Fly ash geopolymer has been utilized
as a replacement for traditional cement
concrete. An environmentally friendly and
economically advantageous substitute for
conventional concrete is geopolymer concrete
with ceramic tile waste powder. To identify
some superior alternatives for making GPC,
the present study includes an experimental
investigation on the compressive strength of
GPC created from various other options and
quantities of Fly ash and wastage tiles powder.
Another focus of this research is on eliminating
environmental waste for a better society.
In this study, nine distinct types of concrete
cylinders were produced, each with 5%,
10%, and 20% of fly ash replaced with GCV
(Geopolymer Concrete with Vitrified Tile
Powder) and GCW (Geopolymer concrete
with wall tiles powder), respectively. Even
though the replacement percentages are not
so high, they do matter in terms of maintaining
a sustainable, environmentally friendly
workplace and managing waste. Additionally,
geopolymer concretes are made without the
use of heat curing, which encourages sustainability
in the generation of thermal energy.

BRE Method of Concrete Mix Design using Sawdust Ash as Partial Replacement for Fine Aggregate with the Application of C++ Programming Language

2023-12-04T15:13:58+0530

The ultimate goal of this research was to
compare and empirically analyze the three
different mix ratios that result from the
Building Research Establishment (BRE)
method of designing concrete mixes using
uncrushed coarse aggregate at different
targeted strengths. These ratios are
1:2.05:2.95/0.54, 1:2.23:3.21/0.58, and
1:2.41:3.47/0.62. Additionally, the study
aimed to evaluate the effects of the mixes on
freshly prepared concrete and measure the
degree of workability of the concrete using
tests for slump and compaction factors.
Experiments were conducted to investigate
the physical characteristics of the components
that make up concrete. These included tests
for specific gravity on the materials, density,
bulk density, and unit weight as well as a
sieve analysis test to grade the aggregates
(fine and granite), which was inferred from
the particle size distribution curve. The
averages of these data were used for the
analyses of the derived results. The fine
aggregate was partially replaced with Saw
Dust Ash (SDA) at various percentages of
replacement. Compressive, Split-tensile and
flexural strength tests at these variable
percentages of partial replacement of fine
aggregate, involving 0%, 5%, 10%, 15%, and
20% with SDA were done to examine the
effect on their mechanical properties. This
study was geared to determine the optimum
percentage of partial replacement of fine
aggregate by the SDA. The resulting findings
were analyzed using the averages of this data.
SDA was used to partially replace the fine
aggregate at different replacement
percentages. The interest of this study was to
ascertain the ideal proportion of SDA to
substitute fine aggregate in part. After
analyzing the obtained data emanating from
the various mechanical experiments, the
average optimum percentage of sand
replacement by SDA was found to be 5% for
effectiveness. SDA as a waste material should
be used at a maximum of 5% replacement of
fine aggregate to enhance the compressive,
tensile and flexural strength and to minimize
the environmental hazards as well as control
the dead load of structural elements and for
the economy.