Recycling ground granulated blast furnace slag as cold bonded artificial aggregate partially used in self-compacting concrete

Self Compacting Concrete (SCC) as one type of concrete that is mostly used in building construction has good workability and can be obtained by adding filler instead of cement. Ground Granulated Blast Furnace Slag (GGBFS) has a chemical composition similar to the content in cement. Therefore, the study of the use of GGBFS was used as a partial substitute for cement in the SCC to examine the influences and quality of GGBFS on fresh concrete and to obtain SCC with the best compressive strength. This research method uses an experimental method by making SCC concrete specimens with an initial fas of 0.4 according to ACI 211.4R-93. The specimens were worked using GGBFS levels of 0%, until 80%, and using 1,4% superplasticizer, and 2% accelerator by weight of cement. The use of GGBFS at SCC can increase the value of compressive strength of about 4,27%-25,64 compared to SCC without using GGBFS. The resulted are known that GGBFS can influence compression strength. Based on the testing of fresh and hard concrete, it concluded that the best quality of SCC used 20% of GGBFS.

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Comparative Study of Properties of Self Compacting Concrete Made With Ground Granulated Blast Furnace Slag and Metakaoline

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2018.6234 ◽

2018 ◽

Vol 6 (6) ◽

pp. 1599-1603

Author(s):

Vipendra Meshram

Keyword(s):

Blast Furnace ◽

Comparative Study ◽

Blast Furnace Slag ◽

Self Compacting Concrete ◽

Granulated Blast Furnace Slag ◽

Furnace Slag

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Mechanical Properties of Self-Compacting Geopolymer Concrete Using Fly Ash and GGBS

Asian Journal of Engineering and Applied Technology ◽

10.51983/ajeat-2018.7.1.889 ◽

2018 ◽

Vol 7 (1) ◽

pp. 19-23

Author(s):

S. Thirupathiraj .

Keyword(s):

Blast Furnace ◽

Fly Ash ◽

Blast Furnace Slag ◽

Geopolymer Concrete ◽

Cement Concrete ◽

Self Compacting Concrete ◽

Split Tensile Strength ◽

Granulated Blast Furnace Slag ◽

Concrete Mix ◽

Furnace Slag

Cement is the core content for the concrete mix. Manufacturing of cement causes CO2 emission which leads to the pollution, health and environmental problems like global warming to control over the adverse effect we can prefer geopolymer concrete which is not a cement concrete. Factory wastes such as fly ash, ground granulated blast furnace slag (GGBS), silica fume and Metakaolin can be used as alternate for cement. This study mainly focus on the ratio of fly ash and ground granulated blast furnace slag (GGBS) for optimum levels which nearly matches the cement concrete properties. This study involves the various tests like slump flow, compression testing, split tensile strength and flexural strength of self-compacting geopolymer concrete. Self-compacting concrete is a highly flowable concrete that spreads into the form without the need of mechanical vibration. Self-compacting concrete is a non-segregating concrete that is placed by means of its own weight. The advantages include improved constructability, Labour reduction, bond to steel, Flow into complex forms, reduced equipment wear etc. The aim of this study is to achieve an optimum self-compacting concrete geopolymer concrete mix proportion using fly ash and ground granulated blast furnace slag (GGBS). Then the study will be further extended by investigating the durability properties of self-compacting geopolymer concrete.

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

The Open Civil Engineering Journal ◽

10.2174/1874149501812010430 ◽

2018 ◽

Vol 12 (1) ◽

pp. 430-440 ◽

Cited By ~ 1

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.

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