TITLE:
Sustainable Construction—High Performance Concrete Containing Limestone Dust as Filler
AUTHORS:
Tahir Kibriya, Leena Tahir
KEYWORDS:
Limestone Dust, Filler, Sustainable Construction, Construction Waste, High Strength Concrete, Cement Filler
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.5 No.3,
July
17,
2017
ABSTRACT: Massive
amounts of limestone waste are produced by the stone processing industry
worldwide. Generally, it is believed that 60% to 70% of the stone is wasted in
processing in the form of fragments, powder and slurry out of which around 30%
is in the form of fine powder [1]. This waste has no beneficial usage and poses environmental hazards. Use
of this waste product in the construction industry can largely reduce the
amount of waste to be disposed off by the local municipalities in addition to
reducing large burden on the environment. Some basic research on use of
limestone dust as cement/ concrete fillerhasbeen carried out in the recent past but high strength/ high performance
concretes have not been investigated yet [2] [3]. The concrete industry is among the largest consumer of raw materials
worldwide and has been investigated for use of various types of waste materials
like crushed brick, rice husk and straw ash as either aggregates for concrete
or as partial cement substitutes. Use of limestone dust as filler material in
concrete can consume a huge amount of this waste material which has to be
disposed off otherwise, creating large burden on the environment. This
experimental study aimed at evaluating the properties of high performance
concretes made from Portland cement, natural aggregates and sand. Limestone
dust was added by replacing sand in the percentages of 10% and 20%. Wide
ranging investigations covering most aspects of mechanical behavior and
permeability were carried out for various mixes for compressive strengths of 60N/mm2, 80N/mm2 and 100N/mm2. Compressive
strengths of concrete specimen with partial replacement of sand with 10% and
20% limestone dust as filler material for 60N/mm2, 80N/mm2 and 100N/mm2 were observed to be higher by about 4% to 12% than
the control specimen. Flexural strengths were also observed to be higher by 12%-13%. Higher elastic
moduli and reduced permeability were observed along with better sulphate and
acid resistance. Better strengths and improved durability of such high-performance concretes make it
a more acceptable material for major construction projects.