scholarly journals Abrasion Resistance Improvement of Recycled Aggregate Pervious Concrete with Granulated Blast Furnace Slag and Copper Slag

2021 ◽  
Vol 19 (11) ◽  
pp. 1088-1099
Author(s):  
Shouwei Jian ◽  
Bo Wei ◽  
Xiao Zhi ◽  
Hongbo Tan ◽  
Baodong Li ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Abrasion Resistance ◽  
Blast Furnace Slag ◽  
Copper Slag ◽  
Pervious Concrete ◽  
Recycled Aggregate ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag ◽  
Resistance Improvement

scholarly journals Effect of Mineral Admixtures on the Performance of Low-Quality Recycled Aggregate Concrete

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 596
Author(s):  
Yasuhiro Dosho
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Mineral Admixtures ◽  
Structural Concrete ◽  
Aggregate Concrete ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

To improve the application of low-quality aggregates in structural concrete, this study investigated the effect of multi-purpose mineral admixtures, such as fly ash and ground granulated blast-furnace slag, on the performance of concrete. Accordingly, the primary performance of low-quality recycled aggregate concrete could be improved by varying the replacement ratio of the recycled aggregate and using appropriate mineral admixtures such as fly ash and ground granulated blast-furnace slag. The results show the potential for the use of low-quality aggregate in structural concrete.

scholarly journals Characteristics of Blended Geopolymer Concrete Using Ultrafine Ground Granulated Blast Furnace Slag and Copper Slag

2020 ◽  
Vol 44 (6) ◽  
pp. 433-439
Author(s):  
Vijayasarathy Rathanasalam ◽  
Jayabalan Perumalsami ◽  
Karthikeyan Jayakumar
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Sodium Hydroxide ◽  
Blast Furnace Slag ◽  
Copper Slag ◽  
Fine Aggregate ◽  
Geopolymer Concrete ◽  
Strength Performance ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

This paper presents the properties of blended geopolymer concrete manufactured using fly ash and ultrafine Ground Granulated Blast Furnace Slag (UFGGBFS), along with the copper slag (CPS) as replacement of fine aggregate (crushed stone sand). Various parameters considered in this study include different sodium hydroxide concentrations (10M, 12M and 14M); 0.35 as alkaline liquid to binder ratio; 2.5 as sodium silicate to sodium hydroxide ratio and cured in ambient curing condition. Further, geopolymer concrete was manufactured using fly ash as the prime source material which is replaced with UFGGBFS (0%, 5%, 10% and 15%). Copper slag has been used as replacement of fine aggregate in this study. Properties of the fresh manufactured geopolymer concrete were studied by slump test. Compressive strength of the manufactured geopolymer concrete was tested and recorded after curing for 3, 7 and 28 days. Microstructure Characterization of Geopolymer concrete specimens was done by Scanning Electron Microscope (SEM) analysis. Experimental results revealed that the addition of UFGGBFS resulted in an increased strength performance of geopolymer concrete. Also, this study demonstrated that the strength of geopolymer concrete increased with an increase in sodium hydroxide concentration. SEM results revealed that the addition of UFGGBFS resulted in a dense structure.

scholarly journals Experimental Study on the Effects of Recycled Concrete Powder on Properties of Self-Compacting Concrete

2018 ◽  
Vol 12 (1) ◽  
pp. 430-440 ◽  
Author(s):  
Hongzhu Quan ◽  
Hideo Kasami
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Fine Powder ◽  
Drying Shrinkage ◽  
Recycled Aggregate ◽  
Self Compacting Concrete ◽  
Granulated Blast Furnace Slag ◽  
Slump Flow ◽  
Furnace Slag ◽  
High Range

Introduction:Although hundreds million tons of concrete wastes have been generated annually in China, the use of recycled aggregate for concrete is limited because of low density and high absorption due to adhered cement paste and mortar.Methods:A new method to produce high quality recycled aggregate by heating and grinding concrete rubbles to separate cement portions adhering to aggregate was developed recently. In this process by-product powder with the fineness of 400m2/kg is generated. By-product recycled fine powder consists of fine particles of hydrated cement and crushed aggregate. To use the recycled fine powder as concrete additives two series of experiments were performed to make clear of the effect of recycled fine powder.Results and Conclusion:Self-compacting concrete with recycled fine powder, granulated blast furnace slag and granulated limestone were tested for slump flow, compressive strength, modulus of elasticity and drying shrinkage. Reduction in super plasticizing effect of high range water reducer was found for concrete with recycled powder. Compressive strength of concrete with recycled fine powder was the same as those with granulated limestone, and lower than those with granulated blast furnace slag. Concrete with recycled fine powder showed lower elastic modulus and higher drying shrinkage than those with granulated blast furnace slag and granulated limestone. The recycled fine powder is usable for self-compacting concrete without further processing, despite the possible increase in dosage of high range water reducer for a given slump flow and in drying shrinkage. The addition of granulated blast furnace slag together with recycled powder to self-compacting concrete improved super plasticizing effect of high range water reducer and properties of concrete.

scholarly journals A Research on Strength of Concrete by Replacing Natural Sand with Granulated Blast Furnace Slag

2020 ◽  
Vol 8 (5) ◽  
pp. 2851-2854
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Copper Slag ◽  
Sieve Analysis ◽  
River Sand ◽  
Durability Test ◽  
Natural Sand ◽  
Granulated Blast Furnace Slag ◽  
Fine Aggregates ◽  
Furnace Slag

There are numerous negative social and environmental effects of overuse of river sand for construction. To reduce this, various substitutes have been used such as quarry dust, demolished concrete waste, industrial waste such as copper slag, eco sand etc. GBFS (Granulated Blast Furnace Slag) is a slag obtained from the manufacture of iron in steel industries. This research aims to investigate the possibility of replacing Granulated Blast Furnace Slag (GBFS) as sand substitutes in concrete. In this research, natural sand was replaced by GBFS in various percentages (0%, 25%, 50%, 75% and 100%) with a constant water cement ratio of 0.45. Tests such as sieve analysis, specific gravity, fineness modulus and bulk density were done for fine aggregates and GBFS sample. Different mixed proportions for different percentage replacement of fine aggregates was obtained for M30 grade concrete as per IS 10262: 2009. The durability test was done for cubes of control mix and GBFS mix (0%, 25%, 50%, 75% and 100%). It was found the strength of concrete was improved due to the addition of GBFS as fine aggregates. Test results showed that the compressive strength of concrete increased with increase in percentage of GBFS up to 75%. Beyond 75%, there was a marginal decrease in strength of concrete.

Effects of bottom ash and granulated blast furnace slag as fine aggregate on abrasion resistance of concrete

2017 ◽  
Vol 24 (2) ◽  
pp. 261-269 ◽  
Author(s):  
Turhan Bilir ◽  
Isa Yüksel ◽  
Ilker Bekir Topcu ◽  
Osman Gencel
Keyword(s):  
Blast Furnace ◽  
Abrasion Resistance ◽  
Blast Furnace Slag ◽  
Bottom Ash ◽  
Fine Aggregate ◽  
Positive Effects ◽  
Granulated Blast Furnace Slag ◽  
Concrete Production ◽  
Furnace Slag ◽  
By Products

AbstractAbrasion resistance is one of the most important durability properties of concrete. Especially, highway, airport and industrial floor pavements should be resistant to abrasion. Recently, many research studies have been carried out on the utilization of industrial by-products in concrete. Granulated blast-furnace slag (GBFS) and bottom ash (BA) are two of these by-products. BA is not generally utilized in concrete and has a limited usage. It is mostly dumped, leading to additional costs and environmental problems. On the other hand, both GBFS and BA have potential for concrete production to provide sustainability. They can substitute fine aggregate thanks to their positive effects on concrete durability. Therefore, the aim of this study was to investigate the abrasion resistance of concretes produced with GBFS and BA substituting fine aggregate. Three different concrete series were produced by replacing fine aggregate with GBFS, BA and both of them by mixing them at equal ratios. The replacement ratios of by-products were 10%, 20%, 30%, 40% and 50% by volume. Compressive strength and Bohme abrasion tests were conducted on series. Results were compared to each other. It can be said that abrasion resistance can be improved by these by-products.

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