Abstract:
Concrete is the most widely used man-made construction material. It is obtained by mixing cement,
water and aggregates (and sometimes admixture) in required proportions. Aggregates contain
approximately 75% of the concrete's body and give greater volume stability and durability than
hydrated cement paste. Despite being a relatively simple idea, concreting can be difficult to
understand at times, and even seemingly insignificant variables like temperature can have a
significant impact on how well concrete performs.
A comprehensive investigation of the compressive and split tensile strengths by percentage of waste
brick aggregate used in concrete that was mixed, poured, and allowed to cure at varied
temperatures was conducted. The effect on workability using slump test and water absorption test
were investigated. The waste brick used as replacements was collected from brick production area
that is found in a Jimma.
This objective provides an overview of the effects of high temperature on the property of concrete
materials and structure temperature on waste brick aggregate as partial replacement for natural
coarse aggregate by 10%, 20%, 30%, and 40% by volume in C-25 concrete production with
investigation of optimum ratio of replacement and engineering properties of C-25 concrete.
A total of ninety three concrete mixes were made that include the control and the replacement
mixes. A water/cement ratio of 0.5 was used for all the mixes. From the research, it was observed
that the addition waste brick aggregate reduces workability of wet concrete. The results harden
concrete work have shown that, up to 30% replacement of the waste brick aggregate with
temperature effect achieved a higher compressive strength, split tensile strength and water
absorption at all test ages i.e. 7and 28 days of curing test.
It can therefore, be concluded that 30% replacement of natural coarse aggregate by waste brick
aggregate with temperature effect results in a similar concrete properties with control test and it is
the optimum replacement. This paper also deals with the procedure and precautions to be observed
while concreting in high temperature conditions so as to minimize the detrimental effects of
temperature on concreting in general types of construction, such as buildings, and other similar
structures
