Mechanical Properties of Concrete with Sintered Fly Ash Aggregate as Substitute of Natural Fine Aggregate

Abstract

Attempts have been made from time long to develop construction materials which should be strong, durable and simultaneously of light weight. In an attempt to reduce the self-weight of the structural concrete, light weight aggregates are being used and implemented. Fly ash is a waste material of coal based thermal power plants. Presently, fly ash is being used in construction industries in different ways. Sintered fly ash aggregates when used as a substitute for natural aggregates benefits the preservation of natural aggregates as well as the utilization of fly ash which poses a great environmental problem for its disposal. Simultaneously, it also reduces the cost of concrete. In the present investigation, sintered fly ash light weight aggregates have been used as a partial replacement of natural sand as fine aggregate in concrete. Varying percentages of natural fine aggregate have been replaced by sintered fly ash light weight aggregates. Experimental investigations have been carried out to study the mechanical properties related to the strength of concrete, namely, compressive strength, split tensile strength and flexural strength with sintered fly ash aggregate as fine aggregate substitute in concrete. In all mixes, silica fume have been used in conjunction with the binder material consisting of ordinary Portland cement.

Cold Bonded and Low Temperature Sintered Artificial Aggregate Production by Using Waste Materials

“…The investigations associated with producing artificial lightweight aggregates and employing industrial wastes showed that the compressive and flexural strengths of the composite and its ductility could be improved. It was shown in Basa et al [3] study that using sintered fly ash aggregate as a replacement for fine aggregates enhanced compressive strength, splitting tensile strength, and flexural strength. Cold bonded fly ash lightweight aggregate was employed to increase the permeability of self-compacting concrete [4].…”

Physical and Mechanical Properties of an Artificial Aggregate Made up of Ground Granulated Blast-Furnace Slag

“…[10,11] Sintered fly ash artificial aggregate as a replacement for fine aggregate improved the mechanical properties and fracture strength of concrete. [12] A compressive strength of concrete between 20 MPa and 80 MPa could be achieved using artificial aggregate. The axial strength of the concrete increased with the use of 10% of fly ash artificial aggregate as a replacement for natural coarse aggregate.…”

Comparison of Physical and Mechanical Properties of Cold Bonded and Sintered Lightweight Artificial Aggregates

“…At the same time ductility characteristics of artificial lightweight aggregates could be advanced. In the [1] study, it was found that the compressive, splitting, and the flexural strength values were improved using the sintered fly ash (FA) aggregate as a substituted material for the fine aggregates. Cold bonded pelletization manufacturing technique was utilized to produce ALAs [2].…”