Keywords : fly ash

A Scientometric Review of Na2SiO3/NaOH Versus SiO2/Na2O is above 2.85:1 Alkaline solution Activated Geopolymer Concrete

Jagandas S.; Mallikarjuna Rao G; Hitesh Kumar M; Srujan Kumar T

International Research Journal on Advanced Science Hub, 2022, Volume 4, Issue 06, Pages 175-179
DOI: 10.47392/irjash.2022.042


The term geopolymer is a sustainable binder refers to the study of waste mate- rials containing silicon (Si) and aluminum (Al), which create an alternative binder formed by a complex repeated chain by geopolymerization process. Hellacious materials alternation is mandatory to see the construction as a beautiful infrastructure as there are limited natural resources to produce qual- ity concrete. Alternative binder and aggregates created by using industrial waste should be used to reduce the disadvantages of conventional concrete. The Na2SiO3 / NaOH ratio activated geopolymer concrete has been well doc- umented by researchers. The ratio of these solutions to the field geopolymer concrete production is not suitable for structural geopolymer concrete because it is not possible to provide a temperature greater than 60 degree centrigrade in the field. The Na2SiO3 / NaOH ratio should be mixed 24 hours before airing the samples. Researchers have used a single alkaline solution simply instead of water when mixing concrete. In this review paper clearly compared and ana- lyzed difference between the Na2SiO3/NaOH activated geopolymer concrete versus neutral grade sodium silicate (NGSS) laboratory-based field construc- tion geopolymer concrete. NGSS is a neutral grade of SiO2: Na2O. This solu- tion is the only single neutral grade solution with 2.92 silica modulus, produced directly by the company to create the geopolymer.

Strength Comparison of Bamboo and Steel Reinforcement in Mud Concrete

MOHAMMED SAFIUDDIN; Mohammed Ahmed Hussain

International Research Journal on Advanced Science Hub, 2021, Volume 3, Issue Special Issue ICARD-2021 3S, Pages 86-91
DOI: 10.47392/irjash.2021.071

The authors have designed mud concrete, by replacing cement with Over the past decade the price of construction materials like cement, aggregates, steel etc. have increased many folds, making it difficult for rural people to afford the cost of construction. The biggest problem of reinforced cement concrete (RCC) structures is corrosion of steel, as well as carbon footprint.  Locally available Red soil, Fly Ash and achieved an approximate strength 20 MPa meeting the requirements of IS 456:2000 as the minimum grade suggested for RCC structures. This research paper discusses the viability of using bamboo bars as an alternative to steel reinforcement bars in mud concrete.  In this research five mix design variations are designed as per IS 10262-2009, control mix (M20), 20%, 30%, 40% and 50% of partially replaced cement. Each variation comprised of locally available Red Soil (mud), and Fly ash in 2:1 ratio and lime as fixed 5%. Bamboo and steel bars of diameter 12 mm are used. Beam (Prism) of size 500 mm x 100 mm x 100 mm were casted with bamboo and steel reinforcement bars in single and double layers.  These were cured and tested in flexure at 7 and 28 days as per IS 516-2002.The results between the beams of all variations are compared. It is found that the beam with doubly reinforced bamboo bars of 50% cement replacement gave similar results to M20 doubly reinforced steel bars with the added advantage of elimination  of corrosion, decrease in self weight and non brittle breakage.

Evaluation of Compressive Strength of Concrete Made With Fly Ash and M Sand

Uday Kiran N.; Hanmanthu S.; Govardhan C.; Gayathri V.

International Research Journal on Advanced Science Hub, 2020, Volume 2, Issue 10, Pages 11-15
DOI: 10.47392/irjash.2020.182

Concrete is the most commonly used material by humans which stands next to the water in terms of consumption in the world. Due to the rapid growth in the construction sector, the amount of concrete to be used is increasing day by day which requires a huge quantity of natural materials such as river sand and aggregates. Due to the illegal sand mining and overexploitation, the availability of river sand is getting scarce day by day. The cement which acts as a binding material is one of the important materials in concrete. The most commonly used cement is Portland cement. For the generation of 1 ton of cement, approximately 1 ton of Co2 is released into the atmosphere. To overcome these problems, Supplementary cementitious materials to be used as a replacement for the cement. In this experimental work, fly ash and M Sand are used as a replacement to the cement and river sand. The strength properties such as compressive strength and tensile strength were compared with the conventional concrete of M25 grade with the concrete made by using replacement materials.

Study on Strength Characteristics of Geopolymer Concrete using M-Sand

Selvamuthukumar S; Kumaravel S

International Research Journal on Advanced Science Hub, 2020, Volume 2, Issue Special Issue ICAMET 10S, Pages 76-80
DOI: 10.47392/irjash.2020.202

A major environmental issue in the world is pollution in cement production. Geopolymer concrete also in construction industry is an alternate cement material as well as an eco-friendly material. Using fly ash, ground granulated blast furnace slag as base materials and sodium hydroxide and sodium silicate combination as alkaline activators, the geopolymer concrete is prepared. The sand is an important part of concrete; it is mainly procured from natural sources. Environmental and economy aspects are better obtained, if locally available sources can be used. Manufactured sand substitutes the fine aggregate in the concrete in several percentages as the sand is well graded and gives greater concrete power.  In the present analysis, the strength of concrete with manufactured sand is studied in proportions of different percentage as a replacement for natural sand.