scholarly journals An Experimental Study on Alkali Silica Reaction of Concrete Specimen Using Steel Slag as Aggregate

2020 ◽  
Vol 10 (19) ◽  
pp. 6699
Author(s):  
So Yeong Choi ◽  
Eun Ik Yang
Keyword(s):  
Coarse Aggregate ◽  
Steel Slag ◽  
Concrete Specimen ◽  
Test Method ◽  
Mineral Admixtures ◽  
Expansion Rate ◽  
Alkali Silica Reaction ◽  
Test Results ◽  
Volume Stability ◽  
Expansion Test

In this study, the characteristics of the alkali-silica reaction (ASR) expansion of steel slag itself, mortar bars, and concrete specimens using steel slag as aggregate are individually investigated by the expansion test method, to determine if steel slag aggregate in concrete can provide volume stability. The results show that when steel slag is aged in water for one month, its self-expansibility is below the permitted limit of 1.5% according to the JIS A 5015 standard. The ASR test results show that the ASR expansion of the mortar bars continuously increased with the increase in the test period. However, all mortar bars were below the permitted limit of 0.1% after 14 days according to the ASTM C 1260 standard. In contrast, the ASR expansion of concrete specimens was above the criteria prescribed by the ASTM C 1293 standard. From the results, the expansion of concrete specimens could not be controlled within the permitted limit by the ASTM 1293 criteria, even if the expansivity of steel slag did not exceed the criteria. Meanwhile, considering the crack propagation patterns of the concrete specimens, the cracks due to ASR expansion developed and connected even when the expansion was below the permitted limit. Besides, when mineral admixtures were used as the binder in the concrete specimens, there were discrepancies in the results between the expansion rate and the crack properties, such as maximum length and total crack length. Therefore, to accurately determine the change in volume due to ASR expansion in concrete using steel slag as coarse aggregate, it is necessary to check the crack patterns in addition to evaluating the expansion rate.

Chloride Binding of Cementitious Pastes

2010 ◽  
Vol 152-153 ◽  
pp. 363-367
Author(s):  
Ke Feng Tan ◽  
Qing Cao
Keyword(s):  
Cement Paste ◽  
Binding Capacity ◽  
Steel Slag ◽  
Chloride Concentration ◽  
Solution Concentration ◽  
Test Method ◽  
Mineral Admixtures ◽  
Chloride Binding ◽  
Test Results ◽  
Blastfurnace Slag

An experiment was undertaken to investigate the effect of mineral admixtures, w/b, external chloride solution concentration, and carbonation on chloride binding capacity of cementitious paste. The test method was based on equilibrium method. Test results show that incorporating metakaolin, blastfurnace slag, steel slag, and flyash increases chloride binding capacities by 65.9%, 55.3%, 43.9%, and 26.8% respectively. Increasing external chloride concentration and w/c ratio can improve the chloride capacity of pure cement paste. Carbonation of cement paste will reduce the chloride capacity. Chloride binding do affect the durability of reinforced concrete in saline environment.

Alkali-silica reaction: The relation between pore solution characteristics and expansion test results

1990 ◽  
Vol 20 (3) ◽  
pp. 419-428 ◽  
Author(s):  
Benoit Durand ◽  
Jean Bérand ◽  
Richard Roux ◽  
James A. Soles
Keyword(s):  
Pore Solution ◽  
Alkali Silica Reaction ◽  
Test Results ◽  
Expansion Test

Study on the Influence of Mix Design Parameters on the Properties of Self-Compacting Concrete

2013 ◽  
Vol 857 ◽  
pp. 10-19
Author(s):  
Ji Liang Wang ◽  
Xiang Qian Wen ◽  
Jun Hong Shan ◽  
Ying Liu
Keyword(s):  
Fly Ash ◽  
Volume Content ◽  
Coarse Aggregate ◽  
Mineral Admixture ◽  
Design Parameters ◽  
Fine Aggregate ◽  
Test Results ◽  
Self Compacting Concrete ◽  
Volume Stability ◽  
Dry Shrinkage

the influence of mixing amount of mineral admixture, volume content of fine and coarse aggregate have been systematical studied on the workability, mechanical properties and volume stability of self-compacting concrete. Test results showed that with the fly ash content increased, the workability of self-compacting concrete improved significantly, early compressive strength decreased, but increase rate of later strength improved remarkably, and the mixing amount of fly ash inhibited significantly the dry shrinkage of self-compacting concrete; with the volume content of coarse aggregate increased, the workability of self-compacting concrete decreased significantly, but the volume stability of self-compacting concrete improved obviously, thus the optimum volume content of coarse aggregate of self-compacting concrete was range from 0.30 to 0.34; when the volume content of fine aggregate varied at the range of 0.40~0.50, there may be little effects on the workability of self-compacting concrete, but the increase self-compacting concretes volume content could reduce obviously the dry shrinkage of self-compacting concrete. Moreover, the variation in the volume content of coarse and fine aggregate should have slight influence on the early strength of self-compacting concrete, and the influence of the volume content variety on the later strength of self-compacting concrete could be neglected eventually.

Study on the Workability of High Strength Concrete with the Grading of Coarse Aggregate Skeleton Structure

2011 ◽  
Vol 261-263 ◽  
pp. 411-415
Author(s):  
Er Bu Tian ◽  
Feng Chao Wang ◽  
Ren Wei Zhang ◽  
Tao Ji
Keyword(s):  
High Strength Concrete ◽  
Coarse Aggregate ◽  
Concrete Strength ◽  
Uniform Design ◽  
Steel Slag ◽  
High Strength ◽  
Mineral Admixtures ◽  
Strength Concrete ◽  
Sand Surface ◽  
Skeleton Structure

People often use superplasticizer and mineral admixtures (such as steel slag, slag, etc.) to increase the density of concrete and improve concrete strength, but don’t use coarse aggregate gradding. The paper selects the coarse aggregate of skeleton structure from several grading concept, and uses Uniform Design to test high strength concrete workability, and analyses results. It is shown from the results that the method of Uniform Design can significantly reduce the workload, and concrete mixture slump increases linearly with the water-cement ratio and sand percentage, but decreases linearly with steel slag addition, and the water released from the flocculation of cement by superplasticizer can increase the slump, and most of water plays the role of lubricant before it reacts with cement, and the effect of slump that sand extends coarse aggregate skeleton are greater than that sand surface area increases.

Evaluation of Steel Slag Fine Aggregate in Hot-Mix Asphalt Mixtures

1997 ◽  
Vol 1583 (1) ◽  
pp. 28-36 ◽  
Author(s):  
Prithvi S. Kandhal ◽  
Gary L. Hoffman
Keyword(s):  
Hot Mix Asphalt ◽  
Coarse Aggregate ◽  
Steel Slag ◽  
Hot Water ◽  
Test Method ◽  
Fine Aggregate ◽  
Limestone Aggregate ◽  
Aggregate Fraction ◽  
Water Conditioning ◽  
Test Criteria

Since a considerable amount of steel slag is produced in the southwestern part of Pennsylvania around Pittsburgh, where natural fine aggregate sources are limited, an evaluation was undertaken to determine the feasibility of using “cured” steel slag fine aggregate in hot-mix asphalt (HMA) mixtures. The objectives of this work were to (1) correlate fine aggregate expansions to the “parent” coarse aggregate expansions, (2) determine properties of dense-graded Pennsylvania ID-2 wearing coarse mixtures made with various sources of steel slag and crushed limestone fine aggregate, and (3) recommend appropriate specifications and test criteria for implementing the use of steel slag fine aggregate, if justifiable. Expansive characteristics of the steel slag aggregates were determined by Pennsylvania Test Method 130. HMA mixtures made with steel slag aggregates and limestone aggregate (control) were subjected to hot-water conditioning and Lottman freeze-and-thaw conditioning to determine potential problems, such as swell and moisture-induced damage. An excellent correlation existed between the average total expansion of the fine aggregate fraction and that of the “parent” coarse aggregate. No significant problems with swell and moisture-induced damage were noted in HMA mixtures containing steel slag fine aggregate and limestone coarse aggregate. Specifications and test criteria were recommended for the use of steel slag fine aggregate in HMA mixtures.

Improving Effect of Mineral Admixtures on Volume Stability of Steel Slag Mortar

2009 ◽  
Vol 620-622 ◽  
pp. 619-622
Author(s):  
Yun Xia Lun ◽  
Ming Kai Zhou ◽  
Xiao Cai
Keyword(s):  
Flexural Strength ◽  
Linear Expansion ◽  
Steel Slag ◽  
Mineral Admixture ◽  
Mineral Admixtures ◽  
Compaction Rate ◽  
Volume Stability

The effect of two kinds of mineral admixtures (MA) on volume stability of steel slag mortar (SSM) is investigated in order to solve the expansion problem due to steel slag. The rate of linear expansion and flexural strength of SSM containing mineral admixture have been compared with control specimens. Addition of FA and GGBFS slowed down the rate of expansion gain and prolonged the stable ages of SSM. In addition, FA and GGBFS increased later flexural strength of SSM. The improving effect of FA and GGBFS on volume stability of SSM was attributed to the increase of later flexural strength and enhancement of compaction rate.

Study on Abilities of Mineral Admixtures and Geopolymer to Restrain ASR

2006 ◽  
Vol 302-303 ◽  
pp. 248-254 ◽  
Author(s):  
Ke Liang Li ◽  
Guo Hong Huang ◽  
Lin Hua Jiang ◽  
Yue Bo Cai ◽  
Jian Chen ◽  
...  
Keyword(s):  
Blast Furnace Slag ◽  
Inorganic Material ◽  
Pore Solution ◽  
Test Method ◽  
Sodium Ion ◽  
Mineral Admixtures ◽  
Alkali Silica Reaction ◽  
Granulated Blast Furnace Slag ◽  
Compound Effect ◽  
Furnace Slag

This paper deals with the effect of mineral admixtures and Geopolymer on preventing excessive expansion due to alkali-silica reaction (ASR). The test method used was ASTM C 441-97. Expansions of mortar-bars were measured at 14, 56, 90 days. The results prove that mineral admixtures can effectively restrain ASR. When three kinds of mineral admixtures, silica fume, fly ash, and ground granulated blast-furnace slag (GGBS), were used together, they bring about a compound effect which is more effective to restrain ASR. Mortar expansion can be reduced 81.9 % by this compound effect. Chemical analysis of the pore solution shows that mineral admixtures reduced concentrations of hydroxyl, potassium and sodium ion, so that damages from ASR decreases. Geopolymer, an amorphous inorganic material, was prepared with metakaolin and other mineral admixtures in the condition of high pH. Alkalis fixed in the framework of Geopolymer, there are no enough alkalis to react with active aggregates. Geopolymer does not generate any dangerous alkali-silica reaction even with alkali contents as high as 12.1 %.

Analysis of Testing Methods for Volume Stability Evaluation of Steel Slag Sand

2011 ◽  
Vol 250-253 ◽  
pp. 1134-1138
Author(s):  
Yun Xia Lun ◽  
Shao Shun Liu ◽  
Ming Kai Zhou ◽  
Xiao Fan Liu
Keyword(s):  
Chemical Analysis ◽  
Steel Slag ◽  
Hot Water ◽  
Expansion Rate ◽  
Analysis Method ◽  
Testing Methods ◽  
Volume Stability ◽  
Aging Steel ◽  
Free Cao ◽  
Mortar Bar

Many testing methods are used to evaluate the volume stability of steel slag sand, but none of them can legalized widely, which hinders its extensive use. Three typical methods-chemical analysis method, steam powdering ratio and mortar bar linear expansion rate under hot-water curing condition are compared in this investigation. The results showed that though chemical analysis method could rapidly judge the volume stability, the content of free CaO and MgO wasn’t precise because of the interference of calcium hydroxide and magnesium hydroxide in aging steel slag sand; the maximum powdering ratio reflected the uneven distribution of expansion components ; mortar bar expansion rate visually presented the volume stability of steel slag sand when used in mortar or concrete. So it was a synthetic application in order to decide the volume stability of steel slag sand.

Experimental Study on the Comprehensive Application of Steel Slag in Concrete

2016 ◽  
Vol 867 ◽  
pp. 157-161
Author(s):  
Shi Ran Zhao ◽  
Kai Feng Zhang ◽  
Gang Meng ◽  
Yuan Yao ◽  
Ning Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Coarse Aggregate ◽  
Steel Slag ◽  
Cementitious Material ◽  
Good Resistance ◽  
Volume Stability ◽  
Comprehensive Utilization ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Maximum Content

In this paper, the performance of steel slag composite cementitious material and the performance of steel slag concrete were studied, which provides reference for the comprehensive utilization of steel slag. The test shows that the activity of steel slag composite cementitious material with the specific surface area is greater than or equal to 400m2/kg to meet the use requirements; When the maximum content of coarse aggregate of steel slag was 25%, the volume stability of steel slag concrete was best. But when the content of steel slag powder was controlled within 30%, the concrete had good resistance to carbonation.

scholarly journals Mechanical properties of steel slag replaced mineral aggregate for road base/sub-base application based Vietnam and Japan standard

2021 ◽  
Author(s):  
Dang Tung Dang ◽  
Manh Tuan Nguyen ◽  
Tan Phong Nguyen ◽  
Tomoo Isawa ◽  
Yasutaka Ta ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Steel Slag ◽  
Road Construction ◽  
Test Method ◽  
Base Layer ◽  
Steelmaking Slag ◽  
Mineral Aggregate ◽  
Iron And Steel ◽  
Volume Stability ◽  
Road Pavement

AbstractSteelmaking slag is one of the most massive industrial by-products generated during steelmaking processes. This paper presents the current steelmaking slag production status and its potential to use as mineral aggregates in base/sub-base layer of road pavement. The mechanical properties of steelmaking slag were confirmed by the test method specified in Vietnam specification. The volume stability test of the slag was conducted based on JIS A 5015-2018 (Japanese Industrial Standard: Iron and steel slag for road construction). From the results, it was confirmed that steelmaking slag can satisfy all the mechanical requirements specified in Vietnam specification and the requirements regarding stability specified in JIS A 5015-2018. In addition, it was found that the elastic modulus of steelmaking slag applied as a base or sub-base layer in pavement was higher than that of the conventional graded aggregate made from mineral aggregate. Therefore, the thickness of pavement can be reduced by using steelmaking slag, and the construction cost can be lower.

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