The Activation of Steel Slag and its Application in Construction and Building Materials

2014 ◽  
Vol 884-885 ◽  
pp. 702-705 ◽  
Author(s):  
Lan Lan Li ◽  
Feng Qing Zhao ◽  
Shao Jie Liu
Keyword(s):  
Building Materials ◽  
Steel Slag ◽  
Concrete Block ◽  
Cement Clinker ◽  
Research Progress ◽  
Hydration Reaction ◽  
Crude Steel ◽  
Volume Stability ◽  
Industrial Solid Waste ◽  
Combined Use

Steel slag as the discharged residue during steelmaking process is a kind of industrial solid waste, accounting for about 15 to 20 percent of crude steel in production. Steel slag is mainly similar with cement clinker in mineral and chemical composition, and possesses potential hydration reaction activity. The properties of steel slag, the research progress of activation and volume stability were summarized in this paper. Several approaches of steel slag utilization in construction and building materials were introduced. The combined use of various activation methods and proper treatment will increase the volume of steel slag in autoclaved tailings bricks and aerated concrete block.

Improving the Volume Stability of Steel Slag for Construction and Building Materials

2014 ◽  
Vol 936 ◽  
pp. 1399-1403 ◽  
Author(s):  
Peng Guan Li ◽  
Feng Qing Zhao ◽  
Zhao Ma
Keyword(s):  
Chemical Modification ◽  
Solid Waste ◽  
Magnesium Oxide ◽  
Calcium Oxide ◽  
Stability Problem ◽  
Building Materials ◽  
Steel Slag ◽  
Free Calcium ◽  
Volume Stability ◽  
Combined Use

Steel slag is a solid waste produced in the process of steelmaking, and applying it to the field of building materials is the main utilization approach at present. However, steel slag contains free calcium oxide and magnesium oxide, existing serious stability problem. The purpose of this work is to discuss the approaches to solve volume stability problem of steel slag through mechanical modification, chemical modification and other methods. Two successful cases we completed recently were presented to illustrate the combined use of several modifying methods for volume stability treatment of steel slag.

Utilization of Steel Slags in the Cement Industry

2014 ◽  
Vol 599 ◽  
pp. 98-102 ◽  
Author(s):  
Jiang Feng Li ◽  
Xiu Cheng Luo ◽  
Meng Ke Sun ◽  
Wei Guo Shen ◽  
Bing Cao ◽  
...  
Keyword(s):  
Steel Slag ◽  
Cementitious Materials ◽  
High Reactivity ◽  
Cement Industry ◽  
Cement Clinker ◽  
Chemical Compositions ◽  
New Approach ◽  
Volume Stability ◽  
Comprehensive Utilization ◽  
Steel Refining

The production of steel slag, a byproduct of the steel refining keeps increasing rapidly and it reached 90.42 million tons in 2011 in China, but its comprehensive utilization ratio is only 22% and far less than the ratio of 65% in Europe. Main chemical compositions of steel slag are CaO, SiO2, Al2O3, FeO, Fe2O3, MgO, MnO, P2O5 and so on, C3S, C2S, C3MS2, RO phase are its common minerals. Due to its high reactivity and Ferro content, steel slag has high potential utilization as supplementary hydraulic cementitious materials or cement clinker meal in cement industry. A method of multiple phased sintering was presented, it can break through the bottlenecks for the steel slag using in the cement industry, e.g. volume stability and grindability ,the carbon emission of cement industry is slashed, it is an effective new approach to massively utilize steel slag in cement industry.

scholarly journals Research progress on the preparation of concrete with large amount of iron tailings

2020 ◽  
Vol 198 ◽  
pp. 01019
Author(s):  
Xiaowei Gu ◽  
Haofeng Chi ◽  
Jianping Liu ◽  
Peng Liu ◽  
Ziyang Hu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Construction Industry ◽  
Carbon Dioxide Emissions ◽  
Building Materials ◽  
Research Progress ◽  
Industrial Solid Waste ◽  
The World ◽  
Ecological Problems ◽  
Sustainable Materials ◽  
Main Component

Recently, the use of sustainable materials has gained increasing attention and recognition, especially in the construction industry. As the main component of concrete, ordinary Portland cement (OPC) is undoubtedly one of the most commonly used building materials in the world. However, the manufacture of OPC is accompanied by environmental and ecological problems such as the release of carbon dioxide. According to estimates, about 5%-8% of the world think that carbon dioxide emissions come from the OPC industry, so it is urgent to use fly ash, tailings, slag and other industrial solid waste to produce cement instead of ordinary Portland cement.This article summarizes the achievements of the predecessors and outlines the influence of different iron tailings and iron tailings content on the mechanical properties and durability of concrete.

Effect of Phosphogypsum on the Properties of Over-Sulfur Phosphogypsum–Ground Granulate Blast-Furnace Slag Cement

2014 ◽  
Vol 638-640 ◽  
pp. 1453-1459
Author(s):  
Zhi Jiang Lv ◽  
Zong Shou Lin ◽  
Hao Jie Wang
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Setting Time ◽  
Steel Slag ◽  
Cement Clinker ◽  
Strength Deterioration ◽  
Volume Stability ◽  
Granulate Blast Furnace Slag ◽  
Mechanical Performances ◽  
Furnace Slag

Over-sulfur phosphogypsum(PG)–ground granulate blast-furnace slag(GGBFS) cement paste is utilized by GGBFS, Portland cement clinker(PCC), additive, water and modificated phosphogypsum paste(MPG), produced by milling PG mixed with a certain proportion of steel slag(SS), GGBFS and water. The effect of PG on the properties of over-sulfur PG– GGBFS cement was investigated. The mechanical performances and hydration mechanism of the cement with different kinds, proportions and particle size of PG were analyzed based on setting time, volume stability, strength test, XRD and SEM analyses. The experimental results show that,the optimum mixture of PG amount in the binder was 45%. Overdose of PG may caused strength deterioration. The optimum grinding time of MPG in the binder was 20min. The soluble phosphorus content of PG in the binder was under 0.05%.

Grinding Aids for Steel Slag and the Application

2014 ◽  
Vol 912-914 ◽  
pp. 158-161 ◽  
Author(s):  
Ying Lei Sun ◽  
Feng Qing Zhao ◽  
Xiao Meng Chu
Keyword(s):  
Building Materials ◽  
Steel Slag ◽  
Research Progress ◽  
Grinding Aids ◽  
Save Energy

Steel slag has been widely used in the building materials industry. Grinding aid contribute much in this process which can save energy and reduce emission. This paper summarizes the major classes, function and research progress of grinding aids. Various kinds of grinding aids were discussed. Some problems concerning the application and developing trends of grinding aids were put forward.

scholarly journals Development of Sustainable Concrete Using Alternative Building Materials By Replacing Industrial Waste Steel Slag for Aggregates

2019 ◽  
Vol 8 (6) ◽  
pp. 2745-2749
Keyword(s):  
Building Materials ◽  
Solid Waste Management ◽  
Waste Product ◽  
Steel Slag ◽  
Steel Production ◽  
Strength Testing ◽  
Foundry Sand ◽  
Industrial Solid Waste ◽  
Clay Bricks ◽  
Natural Aggregates

It has now been found that industrial solid waste management is a major worldwide concern. Because of its heavy price effects, which cause economic and other environmental risks, most industries are not interested in the therapy and secure disposal of these waste. The disposal of waste foundry sand and slag is of main significance due to the trivial amount produced from the foundries throughout the world. Steel slag is a waste product produced during steel production. This waste has disposed of in the form of landfills, which creates enormous pollution of the soil. As a result, the need to use these waste is very essential due to increased demand to protect the usual environment, mainly in fields where it is built up. Consequently, replacing of natural aggregates with foundry slag would lead in considerable environmental advantages. In addition, paver blocks that are commonly used in building are inferior to burnt clay bricks in structure. In this project, therefore, normal fine and coarse aggregate should be substituted by foundry slag and foundry sand in the paver block. Several studies will be used to perform the studies, including compressive strength testing, tensile strength testing and flexure strength testing. Foundry waste is gathered from Foundries around Coimbatore.

Researcher Progress of Steel Slag Cascade Utilization in Building Materials

2014 ◽  
Vol 629-630 ◽  
pp. 293-298 ◽  
Author(s):  
Gang Meng ◽  
Kai Feng Zhang ◽  
Shi Ran Zhao ◽  
Meng Xue Ouyang ◽  
Xiang Li
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Building Materials ◽  
Steel Slag ◽  
Test Methods ◽  
Fine Aggregate ◽  
Volume Stability ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Furnace Slag

This paper studied the cascade use of industrial waste slag as the cementitious material, the fine aggregate and the coarse aggregate, assisted by XRD, SEM and other microscopic test methods. The results that the system had the best volume stability when the steel slag addition of 40%. When the cement mortar prepared by 10% steel slag fine aggregate, and mixed with 20% steel slag powder and 20% blast furnace slag powder, the mortar construction performance and shrink resistant performance is excellent. On the basis of concrete double mixing 25% steel slag aggregate and 30% steel slag powder, compound mixing 20% blast furnace slag powder, the durable properties of concrete are also excellent.

New Research Progress in Activation of Steel Slag Activity

2014 ◽  
Vol 1030-1032 ◽  
pp. 125-129
Author(s):  
Rui Li Wei
Keyword(s):  
Steel Slag ◽  
Raw Material ◽  
Cement Clinker ◽  
Research Progress ◽  
Lower Activity ◽  
Slag Cement ◽  
New Research

Steel slag has potential hydraulic reactivity, it can replace raw material for making cement clinker, or directly product slag cement as admixture, but there is a problem that it has a lower activity as the admixture to produce slag cement. The reasons for lower activity of steel slag and motivation of steel slag activity were discussed in detail.

Novel Cementious Materials from Industrial Solid Waste for Silt Soil Solidification

2010 ◽  
Vol 150-151 ◽  
pp. 711-718
Author(s):  
Guo Hua Xie ◽  
He Qing Du ◽  
Shu Jing Zhu ◽  
Yong Jie Xue
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Solid Waste ◽  
Blast Furnace Slag ◽  
Steel Slag ◽  
Hydration Product ◽  
Cement Clinker ◽  
Unit Weight ◽  
Industrial Solid Waste ◽  
Furnace Slag

Four kinds of industrial solid waste, granulated blast furnace slag (GBFS), electric furnace steel slag (EFSS), semi-dry flue gas desulfurization slag (FGDS) and gypsum were activated by mechanochemistry to prepare a novel kind of cementious material, DA type soil solidification agent (DA agent). Compared to the traditional cementious materials, this paper evaluated DA agent used in silt soil solidification project. Test results showed that DA-4 was prepared with adding the 40% CFBA, 39% GBFS, 11% OPC clinker and 10% gypsum by mill and more superior in material characteristics. It was found that compressive strength of DA-4 paste and mortar specimens at 28-days cured age were 46.0 and 27.3 MPa respectively; 5% of DA-4 was used to stabilize the silt soil in lab and the maximum dry unit weight, optimum moisture content, unconfined compressive strength and CBR value were 1.754 g/cm3, 15.35%, 1.15 MPa and 95.5% respectively. The hardening mechanism of prepared cementious materials is explained by two points: the sulfite or sulfate activation on alkali blast furnace slag; and the hydration product produced from cement clinker hydration process. Besides test programs of the trial pavement section in site showed that stabilized and solidified silt soils by DA-4 can meet the requirement of subgrade of pavement for strength and stiffness.

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