Effects of Fly Ash Addition In

Self-Compacting Concrete

A Thesis Submitted by:

Md. Galib Hossain

Reg. no: 11205041

Md. Monirozzaman Toshar

Reg. no: 11205068

ABSTRACT

Self-compacting concrete is a fluid mixture suitable for placing in structures with congested reinforcement without vibration. Compaction of this concrete is accomplished in all the parts of the form, including the hardly accessible parts, with no additional external force, except the gravity, that is, as a result of the concrete weight. In Bangladesh concrete construction works are increasing rapidly. Planning for building high rise building, long span bridges is undergoing. To meet the goal for construction of these structure normal concrete is not feasible in some cases. To overcome the compaction problem in normal concrete used in Bangladesh, use of self-compacting concrete is necessary. With this background, this study was planned.

Self-compacting concrete development must ensure a good balance between deformability and stability. Also, compactibility is affected by the characteristics of materials and the mix proportions; it becomes necessary to evolve a procedure for mix design of SCC.

The paper presents an experimental procedure for the design of self-compacting concrete mixes and find the effects of fly ash addition in self-compacting concrete. The test results for acceptance characteristics of self-compacting concrete such as slump flow, V-funnel and L-Box are presented. Further, compressive strength at the ages of 7 and 28 days was also determined and results are included here.