Corrigendum to “Partial replacement of copper slag with treated crumb rubber aggregates in alkali-activated slag mortar” [Construction and Building Materials, 256, (2020) 119468]

Alkali-activated slag is known as a building material for more than sixty years and is considered an alternative to Portland cement based binders. Compared to Portland cement it exhibits some superior properties such as higher resistance against chemical attack and exposure to elevated temperatures. Aluminosilicate binders are generally electrical insulators; however, electrical properties of building materials gain the importance in the new field of applications such as self-sensing or self-heating materials. This paper brings a comparison of the electrical properties, especially resistance and capacitance, between Portland cement and alkali-activated slag mortars. The measurements revealed that alkali-activated slag shows enhanced conducting properties due to the presence of mobile hydrated sodium ions and metallic iron microparticles.

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Influence of Industrial By-Products on Shrinkage of Alkali-Activated Slag

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1000.137 ◽

2014 ◽

Vol 1000 ◽

pp. 137-140

Author(s):

Vlastimil Bílek Jr. ◽

Lukáš Kalina ◽

Eva Bartoníčková ◽

Tomáš Opravil

Keyword(s):

Fly Ash ◽

Partial Replacement ◽

Cement Kiln ◽

Hydration Products ◽

Fluidized Bed Combustion ◽

Alkali Activated Slag ◽

Activated Slag ◽

Kiln Dust ◽

By Products ◽

Alkali Activated

One of the highest shortages of alkali-activated slag (AAS) is high shrinkage, both autogenous and drying. One of the possibilities of lowering the shrinkage is partial replacement of slag by suitable admixtures, which can act for example through the forming of expansive hydration products. In this study, 0–50 % of slag was replaced by by-pass cement kiln dust and fluidized bed combustion fly ash. Promising results were obtained especially in the case of fly ash. By using admixtures at higher dosages compressive strengths were reduced.

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Influence of Superplasticizer Quantity on Formation of Micro-Cracks during Setting and Hardening of Concretes by Acoustic Emission Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1124.219 ◽

2015 ◽

Vol 1124 ◽

pp. 219-224 ◽

Cited By ~ 2

Author(s):

Libor Topolář ◽

Kristýna Timcakova ◽

Petr Misák

Keyword(s):

Acoustic Emission ◽

Building Materials ◽

Material Behaviour ◽

Emission Method ◽

Alkali Activated Slag ◽

Volumetric Expansion ◽

Hardening Process ◽

Micro Cracks ◽

Activated Slag ◽

Alkali Activated

The acoustic emission phenomenon is directly associated with nucleation of cracks in building materials, therefore the changes result from the volumetric expansion causing formation micro and macro cracking in structure, which we can recognize. The main aim of the article is to compare four ways of curing alkali activated slag mortars by method of acoustic emission. A comprehension of microstructure−performance relationships is the key to true understanding of material behaviour. The results obtained in the laboratory are useful to understand the various stages of micro-cracking activity during the hardening process in quasi-brittle materials such as alkali activated slag mortars and extend them for general practice

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Chloride Resistance of Alkali Activated Slag Pastes with Fly Ash Replacement

Materials Science Forum ◽

10.4028/www.scientific.net/msf.851.98 ◽

2016 ◽

Vol 851 ◽

pp. 98-103

Author(s):

Ladislav Pařízek ◽

Vlastimil Bílek Jr. ◽

Matěj Březina

Keyword(s):

Mechanical Properties ◽

Fly Ash ◽

Raw Materials ◽

High Energy ◽

Partial Replacement ◽

Alkali Activated Slag ◽

Practical Applications ◽

Chloride Resistance ◽

Activated Slag ◽

Alkali Activated

High energy requirements due to producing of Portland cement leads to a tendency to use secondary raw materials or completely new kind of materials. One of the possibilities is using the materials based on alkali activated slag (AAS). In this paper the influence of partial replacement of ground granulated blast furnace slag by fly ash in AAS pastes on mechanical properties and porosity of was investigated. For practical applications it is also necessary to know their resistance to environment such as salty water. Chloride resistance was investigated by setting the experiment as external chloride attack and measuring the changes of mechanical properties, porosity and composition of the pastes.

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Electrical Properties of Alkali-Activated Slag Mortar with Carbon Fibres

Materials Science Forum ◽

10.4028/www.scientific.net/msf.908.100 ◽

2017 ◽

Vol 908 ◽

pp. 100-105 ◽

Cited By ~ 1

Author(s):

Pavel Rovnaník ◽

Maria Míková ◽

Ivo Kusák

Keyword(s):

Mechanical Properties ◽

Electrical Properties ◽

Building Materials ◽

Specific Conductivity ◽

Carbon Fibres ◽

Alkali Activated Slag ◽

Order Of Magnitude ◽

Activated Slag ◽

Mixing Water ◽

Alkali Activated

Building materials with enhanced electrical properties gain the importance in the new field of applications such as self-sensing or self-heating materials. In this paper, 3 mm long carbon fibres were used as a conductive admixture to alkali-activated slag mortar in order to reduce its resistivity. The amount of carbon fibres was ranging from 0.5 to 4.0% of the slag mass and the effect of the conductive admixture on the mechanical properties, electrical impedance, specific conductivity, and microstructure of alkali-activated slag composite was investigated. Only 0.5% of carbon fibres caused a significant decrease in impedance of alkali-activated slag composite and the addition of 4% reduced the impedance by one order of magnitude for low AC frequencies. However, due to problematic dispersion and higher demand of mixing water, the mechanical properties were deteriorated, especially at higher content of carbon fibres.

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Flexural Fatigue Life Reliability of Alkali-Activated Slag Concrete Freeze-Thaw Damage in Cold Areas

Advances in Materials Science and Engineering ◽

10.1155/2021/1257163 ◽

2021 ◽

Vol 2021 ◽

pp. 1-20

Author(s):

Bin Chen ◽

Jun Wang

Keyword(s):

Fatigue Life ◽

Building Materials ◽

Fatigue Properties ◽

Test Results ◽

Distribution Fitting ◽

Flexural Fatigue ◽

Alkali Activated Slag ◽

Freeze Thaw ◽

Activated Slag ◽

Alkali Activated

Studying the application of alkali-activated slag concrete for roads in cold areas is of great significance for promoting and developing green building materials. In this study, the effect of freeze-thaw damage on the flexural fatigue properties of alkali-activated slag concrete was studied and the fatigue life of alkali-activated slag concrete with various degrees of damage after freeze-thaw cycles was studied through a three-point flexural test. The results show that the flexural fatigue life decreases with freeze-thaw cycles from 0 to 150 times. Through a distribution fitting test and K-S test results, the flexural fatigue life followed both the two-parameter and three-parameter Weibull distributions. Between them, the three-parameter Weibull distribution fitting had a higher accuracy and better test results. The results of the reliability analysis show that the curves of alkali-activated slag concrete samples with various degrees of freeze-thaw damage for various failure probabilities have good correlation under different stresses, and the correlation correlations were greater than 0.81. The flexural fatigue life of alkali-activated slag concrete samples with various degrees of freeze-thaw damage was more sensitive to freeze-thaw damage under high stresses. It is suggested that the fatigue design of alkali-activated slag concrete should consider the adverse effects of cold areas, and the reliability should be improved accordingly.

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Performance of alkali-activated slag-based concrete with partial replacement of fine aggregate by Used Foundry Sand

Journal of Building Pathology and Rehabilitation ◽

10.1007/s41024-021-00127-0 ◽

2021 ◽

Vol 6 (1) ◽

Author(s):

Kanta Naga Rajesh ◽

Ponnada Markandeya Raju ◽

Kapileswar Mishra

Keyword(s):

Partial Replacement ◽

Fine Aggregate ◽

Foundry Sand ◽

Alkali Activated Slag ◽

Activated Slag ◽

Alkali Activated

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Flexural Fatigue performance of Alkali Activated Slag Concrete mixes incorporating Copper Slag as Fine Aggregate

Selected Scientific Papers - Journal of Civil Engineering ◽

10.1515/sspjce-2015-0001 ◽

2015 ◽

Vol 10 (1) ◽

pp. 7-18 ◽

Cited By ~ 2

Author(s):

B.M. Mithun ◽

M.C. Narasimhan ◽

Palankar Nitendra ◽

A.U. Ravishankar

Keyword(s):

Mechanical Properties ◽

Plain Concrete ◽

Copper Slag ◽

Fatigue Performance ◽

Fine Aggregate ◽

River Sand ◽

Alkali Activated Slag ◽

Fine Aggregates ◽

Activated Slag ◽

Alkali Activated

Abstract The present investigation attempts a detailed study of mechanical properties and fatigue characteristics of a new class of Alkali Activated Slag Concrete (AASC) mixes incorporating Copper Slag (CS) as fine aggregates. The natural river sand is replaced with Copper Slag, upto 100% (by volume) as fine aggregate in these AASC mixes. The behavior of plain concrete prisms, cast with this range of AASC mixes under dynamic cyclic loads with sand/CS fine aggregates is studied and is compared with conventional OPC-based concrete specimens. The results indicate that incorporation of CS even upto 100% as fine aggregates, did not have any adverse effects on the mechanical properties of AASC mixes. The AASC mixes with CS displayed slightly better fatigue performance as compared to AASC mix with river sand. An attempt is also made herein to statistically describe the fatigue life data of AASC mixes using a 2-parameter Weibull distribution.

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