International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 07 | July 2022
p-ISSN: 2395-0072
www.irjet.net
Optimization of particle size of Waste foundry sand in geopolymeric bricks and analysis of carbon sequestration. Kenneth Peter Dept. of environmental engineering, KLE Dr. M.S Sheshgiri college of engineering & technology, Belagavi, Karnataka, India ---------------------------------------------------------------------***--------------------------------------------------------------------activators play a major role in producing geopolymers by Abstract – The investigation concentrates on the ability to
dissolving silica and alumina from the raw material and forming alumino-silicate structures. Several waste materials containing silica and alumina sources like red mud, silica fume, GGBS and fly ashes could be used as a source material to produce geopolymer.[5]
put together red mud, waste foundry sand (WFS), clay & fly ash and with the help of sodium hydroxide (NaOH) & sodium silicate (Na2SiO3) as binder to produce geo-polymeric bricks with strength of 3.5-4.5kN/m2. The strength of the bricks was attained after numerous permutations and combinations over the percentage of each component added during the time of brick making and also the curing process and duration for the bricks played a huge role in the following research.
2. MATERIALS AND METHODOLOGY 2.1 MATERIALS USED
Key Words: Waste foundry sand, curing temperature, curing duration, compressive strength.
The materials that were used for the present study are red mud from local refinery plant of Alumina, class F fly ash obtained from a local concrete block manufacturer, clay obtained from the village Desur of Belgaum district via local brick manufacturer, Waste foundry sand obtained from an Industry called Aqua alloys pvt ltd Kolhapur dist. Maharashtra. sodium hydroxide pellets (NaOH) from Nice Chemicals LR grade, 97% assay) sodium silicate gel (Na2SiO3) from Sunchem Chemicals with Na2O =16.25%, SiO2 =34.25%, wt. ratio =1:2.1, water = 49.50 % and finally demineralized water from Environmental lab KLEMSSCET, Belgaum demineralization unit, <10μS/cm).
1.INTRODUCTION The population resumes to grow rapidly in the countries which are still under developing status and great pressure is being placed on land, water, energy, and biological resources to provide an ample supply of food and energy. Population directly possess threat to the environment mainly through changes in land use and industrial operations .The level of economic growth in India is on rise and it has to deal with problems of land interferences on productive agricultural lands. Some estimates indicate that the impact of human activities has come along to such point where the capacity of planet earth and its ecosystems to bear on a sustainable basis has become scarce. Considering all the above reasons it is very important to study the relationship between population pressure, changes in land use and degradation of environment in the country.[2] The indolent and nonstandard practices used for disposal has brought down immense challenges in dumping non-ferrous industrial solid waste and municipal solid waste. Such industrial solid waste is currently used for safe waste disposal. A large number of land areas, which influence sustainable use, are dominated by the landfill. Red mud [RM] is an industrial solid waste where the worldwide annual production of red mud is estimated at over 70 million tonnes.[1]
2.2 PREPARATION OF ACTIVATOR The desired amount of NaOH as per the molarity of solution required and dissolve bit by bit into the beaker with water to evade any accident from exothermic reaction. The dissolved solution is then transferred to a 1000ml conical flask to make 1L solution. Then take 350gm of the solution and mix it with 870gm of sodium silicate gel. After mixing well with both the solutions together add 570mL of tap water to get the activator. The activator is then kept under room temperature for 24 hours to let the temperature from exothermic reaction to cool down and also to decrease the gas bubbles present in the activator
2.3 CASTING OF BRICKS
1.1 GEOPOLYMERS AS BINDING MATERIAL
The materials were prepared using ball mill for crushing of WFS to bring sand to desired size during the casting of bricks, the clay and red mud used in this research are sieved using 4.75 mm to get rid of rubbles and unwanted components from red mud and clay respectively. The materials were introduced into container for dry mixing of
Geopolymer, an inorganic alumino-silicate polymer having potential to form a substantial element of an environmentally sustainable construction. It gets synthesized from materials of geological origin or byproduct materials containing both silica and alumina. Alkali
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