A
Study on Polymer Modified High Volume GGBFS Concrete
Iranna Kubasad1,
Vinayak Vijapur2
1P.G. Student, M. Tech (Structural Engineering), Civil
Engineering Department, Government Engineering College, Devagiri, Haveri,
Karnataka, India
2Assistant Professor, Civil Engineering Department,
Government Engineering College, Devagiri, Haveri , Karnataka, India
Abstract— This
technical investigation represents a study on polymer modified high volume
GGBFS concrete on providing durable and stable constructional material and
increasing in utilisation of high volume of GGBFS in concrete and reduction of
usage of portland cement and reduction of
CO2 in the atmosphere. There was the many number of studies done on the
polymer concrete, the polymer concrete is introduced in 1960’s based on the
technical and practical situation in the construction industry. As considering
the past history of polymer concrete and present situation of modern methods of
strengthening, reparing and increasing in stability and life span civil
engineering structure the technique of polymer concrete is introduced.
The
high volume GGBFS concrete is one of the specific type of GGBFS concrete with
lower water cementitious material ratio and at least 50% of Portland cement by
mass is replaced by GGBFS. Due to lower water content, superplasticizer is
essential in order to achieve the desired workability. GGBFS is used to improve
workability of fresh concrete to reduce the heat of hydration, to increase
durability and the strength of concrete, due to its pozzolanic activity.
In
this study the GGBFS of 50% and 60% is used as the cement replacing material,
SBR latex polymer, Super plasticizer of conplast-430 is used. This work is
conducted to study the polymer modified high volume GGBFS concrete. Mix design
is as per the high volume fly ash concrete technology best practice guidelines
was used. The M30 grade concrete mix was prepared. The total number of
specimens were casted 330. The 165 specimens as 50% and 165 specimens as 60%
GGBFS replacement were casted. Polymer added to the concrete in the percentage
of 0% to 5% in a 0.5% increment. The polymer added to the concrete with weight
of the cementitious materials. The super plasticizer is added 1.2% throught the
mix with weight of the cementitious materials. The higher workability is found
at the 2.5% of polymer addition to the concrete. The strength of concrete is
calculated at different percentages of polymers addition to the concrete. After
the 28days of curing the test results shows the 2.5% of polymer and 50% of
GGBFS replacement has the increase in strength as compared to 60% of GGBFS
replacement for all strengths, i.e compressive strength, split tensile
strength, flexural strength, shear strength, impact strength. Along with this
the near surface characteristics such as water absorption and sorptivity are
studied. By this study shows the percentages addition of polymer in concrete
increases the strengths as compared to conventional concrete.
Keywords— Polymer (SBR Latex), GGBFS, Conplast SP430, strength properties,
workability, water absorption, soroptivity.Click here to download full paper
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