scholarly journals DEVELOPMENT ULTRA-HIGH STRENGTH CEMENTITIOUS CHARACTERISTICS USING SUPPLEMENTARY CEMENTITIOUS MATERIALS

2021 ◽  
Vol 28 (3) ◽  
pp. 111-115
Author(s):  
Ameer Baiee ◽  
Keyword(s):  
Silica Fume ◽  
Blast Furnace Slag ◽  
High Strength ◽  
Cementitious Materials ◽  
Strength Properties ◽  
Supplementary Cementitious Materials ◽  
Replacement Ratio ◽  
Granulated Blast Furnace Slag ◽  
Essential Components ◽  
Furnace Slag

For sustainability purposes, supplementary cementitious materials (SCMs) are considered essential components for gaining ultra-high strength properties of concrete and mortar. This study experimentally investigates the influence of single, binary, and ternary partial cement replacements of the SCMs on the performance of ultra-high-strength mortar. The investigated SCMs were included ground granulated blast furnace slag (GGBS), densified silica fume (DSF), un-densified silica fume (UDSF), and Fly ash (FA). Three replacements ratios were implemented; 10%, 20%, and 30% in addition to mortar without SCMs to work as a control mix for comparison reasons. 27 mixes were designed to quantify the replacement ratio that explains the best performance, through examining the workability, compressive and tensile strength of each mix. In addition, XRD test was carried out to identify the various decomposition phases of the hardened mortar. The results indicated that binary replacement of 15% GGBS and 15% UDSF exhibited the best performance among all other replacements ratios.

Effect of Aggregate Max Size on the Rheological Properties of Self Consolidating Concrete

2020 ◽  
Vol 853 ◽  
pp. 193-197
Author(s):  
Samer Al Martini ◽  
Ziad Hassan ◽  
Ahmad Khartabil
Keyword(s):  
Blast Furnace Slag ◽  
Aggregate Size ◽  
Maximum Size ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Self Consolidating Concrete ◽  
Granulated Blast Furnace Slag ◽  
Concrete Mixtures ◽  
Time Period ◽  
Furnace Slag

The effects of aggregate size and supplementary cementitious materials (SCMs) on the rheology of self-consolidating concrete (SCC) were studied in this paper. Two main concrete mixtures with different maximum aggregate sizes were prepared and investigated. The first mix had a maximum size aggregate of 5 mm and the second mix was with 20 mm max size aggregates. All mixes incorporated different dosages of Ground granulated blast furnace slag (GGBS). The rheology of all mixes investigated was measured over 2 hour time period. It was found that the size of aggregates and GGBS dosage have influence on the yield stress of studied concrete mixes.

scholarly journals Characterization of Supplementary Cementitious Materials and Fibers to Be Implemented in High Temperature Concretes for Thermal Energy Storage (TES) Application

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5190
Author(s):  
Laura Boquera ◽  
David Pons ◽  
Ana Inés Fernández ◽  
Luisa F. Cabeza
Keyword(s):  
Tensile Strength ◽  
Blast Furnace ◽  
High Temperature ◽  
Blast Furnace Slag ◽  
Steel Slag ◽  
Cementitious Materials ◽  
Iron Silicate ◽  
Supplementary Cementitious Materials ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

Six supplementary cementitious materials (SCMs) were identified to be incorporated in concrete exposed to high-temperature cycling conditions within the thermal energy storage literature. The selected SCMs are bauxite, chamotte, ground granulated blast furnace slag, iron silicate, silica fume, and steel slag. A microstructural characterization was carried out through an optical microscope, X-ray diffraction analysis, and FT-IR. Also, a pozzolanic test was performed to study the reaction of SCMs silico-aluminous components. The formation of calcium silica hydrate was observed in all SCMs pozzolanic test. Steel slag, iron silicate, and ground granulated blast furnace slag required further milling to enhance cement reaction. Moreover, the tensile strength of three fibers (polypropylene, steel, and glass fibers) was tested after exposure to an alkalinity environment at ambient temperature during one and three months. Results show an alkaline environment entails a tensile strength decrease in polypropylene and steel fibers, leading to corrosion in the later ones.

scholarly journals Performa Beton Dengan Ground Granulated Blast Furnace Slag Terhadap Sulfate Attack

2020 ◽  
Vol 16 (3) ◽  
pp. 185
Author(s):  
Rizki Amalia Tri Cahyani ◽  
Ernawan Setyono ◽  
Yunan Rusdianto
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Cementitious Materials ◽  
Sulfate Attack ◽  
Supplementary Cementitious Materials ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

Serangan sulfat (sulfate attack) termasuk hal yang umum terjadi pada struktur beton, mengingat ion sulfat banyak dijumpai pada tanah, air tanah dan air laut. Peningkatan ketahanan beton melawan sulfat akan berdampak besar pada durabilitas dan umur layan struktur beton. Penambahan supplementary cementitious materials seperti GGBFS (ground granulated blast furnace slag) ke campuran beton telah terbukti memberikan pengaruh positif terhadap durabilitas dan properti mekanis beton. Namun, GGBFS tergolong material yang baru dikembangkan di Indonesia dan potensinya dalam meningkatkan durabilitas beton belum dimanfaatkan secara luas. Berdasarkan hal tersebut, perlu dilakukan investigasi terkait aplikasi GGBFS dan pengaruhnya terhadap durabilitas beton, terutama dalam melawan serangan sulfat. Dalam studi ini, durabilitas beton dengan persentase penggantian GGBFS 30%, 50% dan 70% terhadap total volume binder dievaluasi menggunakan perlakuan siklus basah-kering dalam larutan magnesium sulfat. Tingkat degradasi beton diukur dengan melakukan observasi terhadap perubahan kuat tekan dan massa spesimen akibat serangan sulfat. Hasil penelitian menunjukkan bahwa penggantian GGBFS hingga 50% dari total volume binder dapat meningkatkan ketahanan beton terhadap serangan sulfat, ditunjukkan dengan kehilangan massa dan reduksi kekuatan yang lebih rendah dibandingkan spesimen kontrol dengan 100% semen Portland.

Durability of Normal and Lightweight Aggregate Mortars with Different Supplementary Cementitious Materials

2021 ◽  
Vol 17 ◽  
pp. 271-281
Author(s):  
Efstratios Badogiannis ◽  
Eirhnh Makrinou ◽  
Marianna Fount
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Lightweight Aggregate ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Granulated Blast Furnace Slag ◽  
Binder Ratio ◽  
Pumice Sand ◽  
Water To Binder Ratio ◽  
Furnace Slag

A study on the durability parameters of normal and lightweight aggregate mortars, incorporated different supplementary cementitious materials (SCM) is presented. Mortars were prepared using limestone or pumice as aggregates and Metakaolin, Fly ash, Granulated Blast Furnace Slag and Silica Fume, as SCM, that they replaced cement, at 10 % by mass. Ten different mortars, having same water to binder ratio and aggregate to cement volumetric ratio, they were compared mainly in terms of durability. The use of pumice sand was proved to be effective not only to the density of the mortars as it was expected, but also in durability, fulfilling at the same time minimum strength requirements. The addition of the different SCM further enhanced the durability of the mortars, where Metakaolin was found to be the most effective one, especially against chloride’s ingress.

scholarly journals The properties of slag-silica fume ternary blended mortar with quarry dust

2020 ◽  
Vol 14 (1) ◽  
pp. 6443-6451 ◽  
Author(s):  
Chow Wee Kang ◽  
Cheah Chee Ban ◽  
Oo Chuan Wei ◽  
Part Wei Ken ◽  
Leow Khang Heng
Keyword(s):  
Portland Cement ◽  
Silica Fume ◽  
Drying Shrinkage ◽  
High Strength ◽  
Total Porosity ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Fine Aggregate ◽  
Granulated Blast Furnace Slag ◽  
Quarry Dust

High carbon emissions of manufactured Portland cement in the concrete industry have incurred several interests in reducing the use of Portland cement by partially replacing it with supplementary cementitious materials. Most of which, are by-products from other manufacturing industries. Hence, the main purpose of this study is to investigate the effects of different combinations of ternary blended mortars incorporating supplementary cementitious materials such as Ground Granulated Blast Furnace Slag (GGBS) and Densified Silica Fume (DSF). In this study, mortars were prepared with 100% quarry dust and GGBS was replaced with DSF at 2% step increments up to 16% at a w/b ratio of 0.24. At the same time OPC content was fixed at 50%. The compressive and flexural strength, drying shrinkage, and porosity of mortars were all tested. The results indicated that the increasing DSF content increases; GGBS reduces the superplasticizer dosage for the desired workability of the mortar. The utilization GGBS and DSF has improved the performances ternary blended mortar incorporating quarry dust as a fine aggregate in terms of mechanical strength, drying shrinkage and total porosity tested. The high strength ternary blended mortar incorporating GGBS and DSF exhibited optimum mechanical and durability performance at the OPC:GGBS:DSF ratio of 50:38:12.

scholarly journals Development of Ultra Strength Concrete

2021 ◽  
Vol 2070 (1) ◽  
pp. 012173
Author(s):  
Ganesh Naidu Gopu ◽  
Sri Durga Vara Prasad M ◽  
Swaroop Babu Mylavarpu ◽  
S Ankarao
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Coarse Aggregate ◽  
High Strength ◽  
Fine Aggregate ◽  
Granulated Blast Furnace Slag ◽  
Chemical Admixtures ◽  
Furnace Slag ◽  
High Range

Abstract Most superior cements delivered today contain materials notwithstanding Portland cement to help accomplish the compressive strength or solidness execution. These materials include fly ash, silica fume and ground-granulated blast furnace slag used discretely or in coalescence. Concurrently, chemical admixtures such as high-range di-hydrogen monoxide-reducers are needed to ascertain that the concrete is facile to convey, place and culminate. For high-strength cements, a blend of mineral and compound admixtures is almost consistently fundamental to guarantee accomplishment of the necessary strength. The Primer investigations have been done on concrete, Fine aggregate and coarse aggregate. The Blend Extent for M200 grade concrete is determined 1: 0.313: 1.463 by following the plan methodology given by ACI Strategy. By keeping up the w/c proportion as 0.25, the multi day Compressive strength, Flexural strength and Split elasticity of cement at 3% of silica fume and 1.5% of conplast have been accomplished as 163.33 N/mm2, 8.4 N/mm2& 9.5 N/mm2 separately. The variety of solidarity of cement with the variety of silica fume is appeared in bar outline. The strength of the concrete might be as yet expanded by decreasing the w/c proportion and expanding the level of silica fume

scholarly journals Assessment of Carbonation on Strength Properties of Concrete Made of Mineral Admixtures

2019 ◽  
Vol 8 (12) ◽  
pp. 1832-1835
Keyword(s):  
Blast Furnace ◽  
Reinforced Concrete ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Strength Properties ◽  
Mineral Admixtures ◽  
Partial Replacement ◽  
Granulated Blast Furnace Slag ◽  
Almost All ◽  
Furnace Slag

Concrete is one of the most suitable materials in the world which are used for construction. It becomes more versatile because of his suitability in almost all situations. Reinforced structures are subject to corrosion by various means. Carbonation is one of these means that causes corrosion of reinforced concrete structures. The service life of the structures has been reduced due to the deterioration of the structures because of the corrosion of the reinforced concrete due to carbonation. This paper focuses on the effect of carbonation on the mechanical properties of concrete composed of mineral admixtures, such as ground granulated blast furnace slag and silica fume, by partial replacement of the cement. In this experiment, silica fume replaced cement in 5%, 10%, 15% and ground granulated blast furnace slag replaced the cement in 10%, 20%, 30%. Samples such as cubes, cylinders and prisms were casted and cured. Certain number of these specimens were also placed in carbonation chamber and tested for compressive strength, tensile strength and flexural strength. Normal concrete samples are also tested and the results are compared.

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