Utilization of water-quenching blast furnace slag as alternative filler in asphalt mastic

2020 ◽  
Vol 47 (9) ◽  
pp. 1075-1083
Author(s):  
Jianyou Huang ◽  
Xiangyang Xing ◽  
Jun Cai ◽  
Jianzhong Pei ◽  
Rui Li ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Complex Modulus ◽  
Asphalt Mixtures ◽  
Water Quenching ◽  
Creep Recovery ◽  
Chemical Compositions ◽  
Asphalt Mastic ◽  
Asphalt Mastics ◽  
Furnace Slag

Water-quenching blast furnace slag as a by-product of the iron production has caused serious environmental concerns. This paper tried to investigate the feasibility of the blast furnace slag filler (WBFSF) used as an alternative filler to replace the limestone filler (LF) in asphalt mixtures. Specifically, the chemical compositions, morphology characteristics, phase distributions, and thermal properties of two fillers were studied; then rheological properties of asphalt mastics in four filler–asphalt ratios were further studied by the rotational viscosity, temperature sweep, temperature–frequency–sweep (T-f-sweep), and multiple stress creep recovery (MSCR) test. The results show that WBFSF has a larger specific surface area and better-developed mesopores compared with LF. WBFSF asphalt mastic presents a larger complex modulus and a smaller phase angle. Moreover, the MSCR results show that WBFSF improves the elastic recovery and rutting resistance of asphalt mastics. Therefore, WBFSF presents great potential to be used as an alternative filler in asphalt mixtures.

Progress in Molten Blast Furnace Slag Treatment Using Dry Centrifugal Granulation Technology

2014 ◽  
Vol 675-677 ◽  
pp. 1406-1410
Author(s):  
Jia Bin Zhu ◽  
Shu Zhong Wang ◽  
Ming Luo
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Waste Heat ◽  
Recovery Process ◽  
Water Quenching ◽  
Huge Amount ◽  
Slag Treatment ◽  
Bf Slag ◽  
Granulation Technology ◽  
Furnace Slag

The molten blast furnace slag (BF slag) is discharged at the temperature of about 1400-1550 °C, which contains a large amount of heat. At present, water quenching is the main technology to treat the BF slag, but this method not only consumes a huge amount of water, but also fails to recover the waste heat. Compared with water quenching, the dry centrifugal granulation has obvious advantages. There is no water consumed and the waste heat can be recovered efficiently, thus this technology has great potential. This technology mainly contains two processes: the granulating process and the heat recovery process. The present development statuses on those two processes are summarized respectively and the prospect of dry centrifugal granulation technology is forecasted.

Investigation on Blending CFB Ash with Blast Furnace Slag as Replacement for Portland Cement Used in Concrete Binders

2013 ◽  
Vol 723 ◽  
pp. 623-629 ◽  
Author(s):  
Guan Yu Chen ◽  
Wei Hsing Huang
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Petroleum Coke ◽  
Blast Furnace Slag ◽  
Circulating Fluidized Bed ◽  
Slag System ◽  
Ash Content ◽  
Chemical Compositions ◽  
Volume Stability ◽  
Furnace Slag

Circulating Fluidized Bed (CFB) Boiler is a means of energy-generating process by burning petroleum coke. In order to avoid blazed petroleum coke with high sulfur content from emitting overdosed sulfur dioxide, limestone is introduced in the boiler for desulfuration. The residue collected from the boiler is called CFB ash. In accordance with different boiler position, CFB ashes can be classified as fly ash and bed ash, and both have similar chemical compositions, with high contents of gypsum and calcium oxide. In this study, CFB ash (fly ash) is mixed with blast furnace slag (BFS) as a substitute for cement in making concrete. It is intended that CFB ashes can be used in concrete and a method for proportioning CFB ash in concrete can be developed. The results show that CFB ash can react with cement to produce hydration products such as Ca(OH)2, and bring the activation of blast furnace slag. The paste strength could be low at later ages, if the CFB ash content is too low. Whereas, if the CFB ash content is over 30%, the paste strength will be low at the early age. Therefore, it is concluded that the cement-granulated blast furnace slag system will show best performance at the CFB ash content between 18% and 22%. In autoclave soundness test shows the CFB ash of the high f-CaO content is easy reaction in the water, and also did not negatively affect the quality of the volume stability.

Application in the Experimental Data Analysis of the Slag Viscosity with Minitab Software

2013 ◽  
Vol 753-755 ◽  
pp. 1857-1861
Author(s):  
Shu Qing Zhang ◽  
Xiu Ling Lv ◽  
Li Hong Zhang ◽  
Na Hui Zhang
Keyword(s):  
Experimental Data ◽  
Blast Furnace ◽  
Data Analysis ◽  
Blast Furnace Slag ◽  
Slag Basicity ◽  
Slag Viscosity ◽  
Chemical Compositions ◽  
Single Factor ◽  
Experimental Data Analysis ◽  
Furnace Slag

The single factor variance of viscosity experimental data of blast furnace slag was calculated by Minitab software. The influence of slag basicity and chemical compositions on the slag viscosity was obtained. The results show that there have insignificant effects on the slag viscosity when the slag basicity is over than 1.02, MgO content is less than 11.95% or TiO2 content is less than 12.57%. While the slag basicity can be influenced significantly with the slag basicity less than 1.02, MgO content over than 13.95% and TiO2 content over 13.57%. The Al2O3 content of the slag should be less than 12.75%.

Synthesis Method of White Carbon Black Utilizing Water-Quenching Blast Furnace Slag

2016 ◽  
Vol 30 (11) ◽  
pp. 9645-9651 ◽  
Author(s):  
Hongyu Gao ◽  
Zhenzhen Song ◽  
Lian Yang ◽  
Haolan Wu
Keyword(s):  
Blast Furnace ◽  
Carbon Black ◽  
Blast Furnace Slag ◽  
Synthesis Method ◽  
Water Quenching ◽  
Furnace Slag
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