scholarly journals A Study on Suitability of EAF Oxidizing Slag in Concrete: An Eco-Friendly and Sustainable Replacement for Natural Coarse Aggregate

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Alan Sekaran ◽  
Murthi Palaniswamy ◽  
Sivagnanaprakash Balaraju
Keyword(s):  
Fly Ash ◽  
Coarse Aggregate ◽  
Experimental Investigations ◽  
Alternative Source ◽  
Conventional Concrete ◽  
Great Opportunity ◽  
Coarse Aggregates ◽  
Durability Properties ◽  
Fast Pace ◽  
C 30

Environmental and economic factors increasingly encourage higher utility of industrial by-products. The basic objective of this study was to identify alternative source for good quality aggregates which is depleting very fast due to fast pace of construction activities in India. EAF oxidizing slag as a by-product obtained during the process in steel making industry provides great opportunity to utilize it as an alternative to normally available coarse aggregates. The primary aim of this research was to evaluate the physical, mechanical, and durability properties of concrete made with EAF oxidizing slag in addition to supplementary cementing material fly ash. This study presents the experimental investigations carried out on concrete grades of M20 and M30 with three mixes: (i) Mix A, conventional concrete mix with no material substitution, (ii) Mix B, 30% replacement of cement with fly ash, and (iii) Mix C, 30% replacement of cement with fly ash and 50% replacement of coarse aggregate with EAF oxidizing slag. Tests were conducted to determine mechanical and durability properties up to the age of 90 days. The test results concluded that concrete made with EAF oxidizing slag and fly ash (Mix C) had greater strength and durability characteristics when compared to Mix A and Mix B. Based on the overall observations, it could be recommended that EAF oxidizing slag and fly ash could be effectively utilized as coarse aggregate replacement and cement replacement in all concrete applications.

scholarly journals Effect of Recycled Coarse Aggregate and Bagasse Ash on Two-Stage Concrete

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 556
Author(s):  
Muhammad Faisal Javed ◽  
Afaq Ahmad Durrani ◽  
Sardar Kashif Ur Rehman ◽  
Fahid Aslam ◽  
Hisham Alabduljabbar ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Coarse Aggregate ◽  
Construction Material ◽  
Strength Reduction ◽  
Recycled Aggregate ◽  
Two Stage ◽  
Conventional Concrete ◽  
Recycled Coarse Aggregate ◽  
Coarse Aggregates

Numerous research studies have been conducted to improve the weak properties of recycled aggregate as a construction material over the last few decades. In two-stage concrete (TSC), coarse aggregates are placed in formwork, and then grout is injected with high pressure to fill up the voids between the coarse aggregates. In this experimental research, TSC was made with 100% recycled coarse aggregate (RCA). Ten percent and twenty percent bagasse ash was used as a fractional substitution of cement along with the RCA. Conventional concrete with 100% natural coarse aggregate (NCA) and 100% RCA was made to determine compressive strength only. Compressive strength reduction in the TSC was 14.36% when 100% RCA was used. Tensile strength in the TSC decreased when 100% RCA was used. The increase in compressive strength was 8.47% when 20% bagasse ash was used compared to the TSC mix that had 100% RCA. The compressive strength of the TSC at 250 °C was also determined to find the reduction in strength at high temperature. Moreover, the compressive and tensile strength of the TSC that had RCA was improved by the addition of bagasse ash.

scholarly journals Resistance of Acid Attack on Geopolymer Concrete Developed with Partial Replacement of Course Aggregate by Recycled Aggregate

2019 ◽  
Vol 8 (4) ◽  
pp. 12142-12146
Keyword(s):  
Fly Ash ◽  
Coarse Aggregate ◽  
Recycled Aggregate ◽  
Partial Replacement ◽  
Geopolymer Concrete ◽  
Acid Attack ◽  
Great Strength ◽  
Conventional Concrete ◽  
Existing Structures ◽  
Binder Material

Geopolymer concrete is one of the major developments in recent years resulting in utilization of fly ash in huge quantities and eventually reducing cement consumption and ultimately reducing emission of greenhouse gases.The geopolymer concrete is produced by using activated fly ash as binder material instead of cement. Geopolymer concrete accomplishes great strength and looks similar to conventional concrete. Recycled coarse aggregate (RCA )which is coming from demolition of construction of old and existing structures has been used in this study. The durability property; acid attack resistance with partial replacement of coarse aggregate by recycled aggregate in geopolymer and conventional concrete for the different composition such as 10, 20, 30 and 40percentage for a period of 15, 45,75 and 105 days has been evaluated. From the results it was observed that in both natural and recycled aggregate of Geopolymer concrete is highly resistant to acids such as sulphuric acid and hydrochloric acid compared to conventional concrete of respective aggregates.

scholarly journals Strength Properties of Concrete by using Flyash, Quarry Dust and Crumb Rubber

2019 ◽  
Vol 9 (1) ◽  
pp. 1290-1294
Keyword(s):  
Fly Ash ◽  
Coarse Aggregate ◽  
Crumb Rubber ◽  
Strength Properties ◽  
Waste Materials ◽  
Fine Aggregate ◽  
Conventional Concrete ◽  
Cost Of Construction ◽  
Day By Day ◽  
Quarry Dust

As construction in India and other developing countries are increasing, the consumption of energy and resources are also increasing in same alarming way. Due to urbanization many industries are developed and the industrial wastage is also increasing day by day which is a serious concern to the environment. Many industries produce various end products, which may be used in construction industry at various places. So we focused on some of the waste materials which can be replaced in conventional concrete, and by then cost of construction can be reduced and is economical, also damage caused to the environment can also be reduced, at the same time landfills can also be reduced. So, we focused on reducing the virgin materials in concrete like cement, fine aggregate and coarse aggregate by replacing them with some waste materials which have same properties of cement, fine aggregate and coarse aggregate. The objective of the present work is to find out the effectiveness of fly ash, quarry dust and crumb rubber by replacing them in varied percentages. Here, cement is replaced by fly ash with percentages as 30%, 40%, 50%, 60% and quarry dust as fine aggregate with percentages of 20%, 30%, 40%, 50% along with crumb rubber as coarse aggregate with percentages as 5%, 10%, 15%, 20%. The results in this study have shown a gradual reduction of compressive strength as we kept on adding the crumbed rubber. Even though the strength obtained for 5% usage of crumbed rubber was quite satisfactory.

scholarly journals Partial Replacement of Cement and Coarse Aggregate by Egg Shell Powder and Coconut Shells

2020 ◽  
Vol 9 (4) ◽  
pp. 1242-1246 ◽  
Keyword(s):  
Coarse Aggregate ◽  
Construction Materials ◽  
Partial Replacement ◽  
Experimental Program ◽  
Split Tensile Strength ◽  
Alternative Source ◽  
Conventional Concrete ◽  
Prime Concern ◽  
Egg Shell ◽  
Coconut Shells

The issues of sustainability are of prime concern these days as we use a large number of natural resources for producing materials such as construction materials. The recent trend in the construction industry is to use the alternative source of construction materials which can substitute the use of natural materials to reduce environmental impact in terms of energy consumption, pollution, waste disposal, and global warming. Aiming at characterizing the behavior of concrete structures made with eggshell powder and coconut shells are replaced in the proportions of the concrete mixture. In the present work, the experimental program was designed to study the properties like strength and workability of concrete by casting the cube of size 150 mm x 150mm x 150 mm and cylinder of size 30 cm height and 15 cm diameter by using M20 grade. This experimental study consists of testing compressive strength of three cubes and split tensile strength of three cylinders of conventional concrete and the comparative cubes and cylinders are made by using different proportions of coconut shells (i.e., 2%, 4%, and 6%) replacement in coarse aggregate and replacement of eggshell powder (i.e., 5%, 10%, and 15%) in place of cement at optimum strength obtained by proportions of coconut shells replaced in coarse aggregate.

scholarly journals Properties of concrete having treated recycled coarse aggregate and slag

2021 ◽  
Vol 20 (2) ◽  
pp. 249-258
Author(s):  
P. Saravanakumar ◽  
◽  
D. Manoj ◽  
S. Jagan ◽  
◽  
...  
Keyword(s):  
Coarse Aggregate ◽  
Considerable Improvement ◽  
Recycled Aggregates ◽  
Coarse Aggregates ◽  
Durability Properties ◽  
Concrete Mixtures ◽  
Concrete Mix ◽  
Mechanical Durability ◽  
Substitute Material ◽  
Substitute Materials

The possibility of using substitute materials for aggregates and cement in concrete were studied and reported in this paper. Concrete mixtures with untreated recycled coarse aggregates (URCA) and treated recycled coarse aggregates (TRCA) were used to prepare two mix groups of without slag (Mix I) and with slag (Mix II). The recycled aggregates were treated with hydrochloric acid (HCl) having different molarities (0.1M, 0.3M and 0.5M) before used as a substitute material for virgin aggregate in concrete. The concrete mechanical, durability properties and morphology of concrete were examined through standard experiments and analysed. In both mix groups considerable improvement in all characteristics were identified in TRCA mixes than URCA mixes. Among the two mix groups the concrete mix with slag (Mix II) showed better durability characteristics than mix without slag (Mix I). The combination of TRCA and slag in concrete substantially increases the characteristics of concrete in all means.

scholarly journals Experimental Study on Lightweight Concrete with Styrofoam as a Replacement for Coarse Aggregate

10.29007/fdhp ◽  
2018 ◽  
Author(s):  
Divya Patel ◽  
Uresh Kachhadia ◽  
Mehul Shah ◽  
Rahul Shah
Keyword(s):  
Experimental Study ◽  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Tall Buildings ◽  
Building Construction ◽  
Light Weight ◽  
Foam Concrete ◽  
Conventional Concrete ◽  
Coarse Aggregates ◽  
Heavy Loads

With the rapid growth in building construction and urbanisation, buildings are getting taller and bigger than ever. In India majority of structures are constructed with the help of concrete resulting into very heavy structures. Heavy loads are one of the limitations for construction of tall buildings. If somehow structures are made lighter, cost of the foundation can also be lowered down. Conventional concrete is one of the main reason in increasing the weight of the buildings. Light weight concrete can be very much effective in reducing the overall weight of the building. In conventional concrete, larger volume comprises of coarse aggregates. In this study, attempt has been made to replace conventional coarse aggregates with Styrofoam which is a very light weight foam. Concrete with different aggregate replacement percentage was tested. The results show very encouraging results for the compressive strength and density.

Performance Using Boiler Ash Clinkers as Replacement for Course Aggregates in Concrete

2016 ◽  
Vol 866 ◽  
pp. 83-87
Author(s):  
Gunalaan Vasudevan
Keyword(s):  
Oil Palm ◽  
Coarse Aggregate ◽  
Oil Industry ◽  
Huge Amount ◽  
Conventional Concrete ◽  
Coarse Aggregates ◽  
Concrete Mix Design ◽  
Concrete Mix ◽  
Palm Waste ◽  
Boiler Ash

Palm oil industry in Malaysia has a phenomenon grow in recent years and this caused lots of oil palm waste generated while the boiler ash clinker (BAC) is one of the waste that left over after burning of the oil palm fibers, empty fruit bunch etc. in a boiler which had mean how the boiler ask clinker will come with a huge amount. In this research, the boiler ash clinker will be used in concrete mixing by partially replace the coarse aggregate that used in conventional concrete. The reason is that the coarse aggregate that use in a concrete mix design is normally carry a high percentage compare to other materials. The percentage of substitution is 5%, 10% and 15% of boiler ash clinker in concrete. There are three (3) main objectives to be achieve in this research which are: to determine the physical properties of boiler ash clinkers on concrete, to determine the effect of boiler ash clinkers on concrete and to identify the applicability of concrete from the gradation of substitution of boiler ash clinkers as coarse aggregates in a concrete mix. Next, the compressive strength and workability for the different percentage of substitution of the boiler ash clinker in the concrete mixture will be identify and analyze in this research. At the end of this research, the conclusion will be made based on the three (3) main objectives and recommendation is given.

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