An experimental study on the properties of resistance to diffusion of chloride ions of fly ash and blast furnace slag concrete

2000 ◽  
Vol 30 (6) ◽  
pp. 989-992 ◽  
Author(s):  
Faguang Leng ◽  
Naiqian Feng ◽  
Xinying Lu
Keyword(s):  
Experimental Study ◽  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Chloride Ions ◽  
Furnace Slag

Chloride Ions Penetration Resistance of New-Old Concrete

2011 ◽  
Vol 366 ◽  
pp. 518-521
Author(s):  
Zhi Min He ◽  
Jun Zhe Liu
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Beneficial Effect ◽  
Blast Furnace Slag ◽  
Penetration Resistance ◽  
Chloride Ions ◽  
Mineral Admixtures ◽  
Compound System ◽  
Astm C1202 ◽  
Furnace Slag

By use of ASTM C1202, this paper studied the influence of mineral admixtures on the chloride ions penetration resistance of the new-old concrete compound system. The results indicate that the performance of new-old concrete exert significant influence on the new-old concrete compound system. The addition of mineral admixtures improve the permeability properties of new-old concrete. Adding fly ash(FA) require a relatively longer time to get its beneficial effect. When 30% weight of cement is replaced by 10% FA and 20% ground blast furnace slag(GGBFS), the inclusion of 30% mineral admixtures significantly improve the chloride ions penetration resistance properties of the new-old concrete compound system at 28 days and 180 days.

Effect of Mineral Admixtures and Water/Binder Ratios on the Resistance to the Chloride Ions Penetration into Concrete

2011 ◽  
Vol 99-100 ◽  
pp. 758-761
Author(s):  
Yan Jun Hu ◽  
Yan Liang Du
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Silica Fume ◽  
Blast Furnace Slag ◽  
Chloride Ion ◽  
Test Methods ◽  
Chloride Ions ◽  
Mineral Admixtures ◽  
Chloride Permeability ◽  
Furnace Slag

In this study, concrete prisms were made with three mineral admixtures: fly ash, blast furnace slag or silica fume and with three water-to-binder ratios(w/b). Chloride penetration was measured by the rapid chloride permeability test (RCPT)-ASTM C1202, 150-days ponding test and alternate wetting and drying test by cyclic loading with salt solution and oven drying, and the results by the three test methods were compared. This paper discussed the effects of mineral admixtures and w/b on the concrete chloride permeability. Blending concrete with blast furnace slag, fly ash or silica fume was beneficial with regard to the resistance against chloride ion penetration. Concrete specimens with lower w/b showed lower chloride permeability.

scholarly journals New Composite Material for Masonry Repair: Mortar Formulations and Experimental Studies

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 912
Author(s):  
Walid Deboucha ◽  
Ibrahim Alachek ◽  
Jean-Patrick Plassiard ◽  
Olivier Plé
Keyword(s):  
Experimental Study ◽  
Composite Material ◽  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Mechanical Performance ◽  
Experimental Studies ◽  
Uniaxial Tensile ◽  
Mineral Additives ◽  
Furnace Slag

The need for retrofitting existing masonry structures is progressively becoming more important due to their continuous deterioration or need to meet the current design requirements of Eurocodes. Textile-Reinforced Mortar (TRM) composite systems have emerged as a sustainable repair methodology suitable for structure retrofitting. Nevertheless, their mechanical performance is still far from being fully investigated. This paper presents an experimental study on the tensile and bond behaviors of a new mortar-based composite consisting of mineral additives, blended cement mortar, and stainless-steel grid. Three different mineral additives (silica fume, fly ash, and blast furnace slag), in binary and ternary systems were used. The experimental study included uniaxial tensile coupon testing on composite specimens and bond tests on composite material applied to clay-brick substrate. The results obtained with the different textile-reinforced cement-based mortars were compared and are discussed here. It was found that, for mortar formulations containing mineral additives—such as fly ash or blast-furnace slag—with high tensile and bond strengths, an adequate adherence between the constituents was obtained. The developed mortar presents mechanical performances equivalent to traditional mortars without additives. The study contributes to the existing knowledge regarding the structural behavior of TRM and promotes the development of a low impact carbon cementitious matrix.

Selection of Alternative Additives and their Influence on High-Temperature Resistance of Repair Mortars

2015 ◽  
Vol 1122 ◽  
pp. 181-184
Author(s):  
Michaela Fiedlerová ◽  
Tomáš Melichar ◽  
Jiří Bydžovský ◽  
Ámos Dufka
Keyword(s):  
Experimental Study ◽  
Blast Furnace ◽  
High Temperature ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Temperature Resistance ◽  
High Temperature Resistance ◽  
Repair Mortars ◽  
Furnace Slag ◽  
Selection Of

Results of an experimental study focused on evaluating the suitability of selected alternative additives and their influence on high temperature resistance of repair mortars based on cement are presented in the article. As an alternative substitute, fly ash and blast furnace slag were selected and added in different dosage up to 10% of cement weight not as a substitution component. Aggregates of amphibolite origin were chosen in regard to the thermal resistance to high temperature.

scholarly journals Chloride Diffusion and Induced Reinforcement Corrosion in Concrete with Fly Ash and Ground-Granulated Blast-Furnace Slag Exposed to Marine Submerged Zone1

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Rui Zhao ◽  
Zuquan Jin ◽  
Guangyan Feng ◽  
Jianqiang Li
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Chloride Ions ◽  
Test Method ◽  
Mineral Admixtures ◽  
Granulated Blast Furnace Slag ◽  
Wire Beam Electrode ◽  
Furnace Slag ◽  
Test Result

This paper investigates the influence of mineral admixtures fly ash (FA) and ground-granulated blast-furnace slag (GGBS), the byproducts of industry, on chloride ions migration and corrosion resistance performance. A novel preparation method of wire beam electrode (WEB) was also introduced to explore the excellent corrosion-resistant capacity of concrete with mineral admixtures. By comparing concrete specimens with and without FA and GGBS, the test result of wire beam electrode, rapid chloride migration (RCM), and electrochemical tests highlight the positive impact of fly ash and GGBS against chloride ions migration, respectively. Concrete with fly ash and GGBS supplies an advanced protection effect of ordinary Portland cement; meanwhile, CO2 emission amount can be significantly reduced. Moreover, homemade wire beam electrode was proved to be a novel and reliable test method against corrosion, which has agreement with the test result of an electrochemical device.

Resistance Performance of Concrete Using both Blast Furnace Slag Cement and Fly Ash against Chloride Attack and Carbonation

2015 ◽  
Vol 1110 ◽  
pp. 271-276
Author(s):  
Kenta Miura ◽  
Takao Ueda ◽  
Masayuki Tsukagoshi
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Pore Structure ◽  
Blast Furnace Slag ◽  
Chloride Ions ◽  
Slag Cement ◽  
Fly Ash Concrete ◽  
Chloride Attack ◽  
Resistance Performance ◽  
Furnace Slag

From the viewpoint of effective utilization of industrial wastes and reduction of CO2 emission, the use of concrete mixed with blast furnace slag and fly ash has been promoted. However, the durability of fly ash concrete using blast furnace slag cement has not been clarified enough. About chloride attack, the resistance against the penetration of chloride ions could be improved due to the dense pore structure formed by the synegetic effect of mixing both ground granulated blast-furnace slag and fly ash into concrete. In this study, resistance performance of concrete using both blast furnace slag cement and fly ash against chloride attack and carbonation was experimentally investigated. The relationship between such resistance performance and pore structure of the concrete was also examined. As a result, the combination of blast furnace slag cement and fly ash type II resulted in the decrease of pore volume over 50 nm in the diameter and reduction of the apparent diffusion coefficient of chloride ion, but the resistance performance against carbonation of the concrete was lower than the case of the normal fly ash concrete.

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.

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