Innovative use of industrially produced steel slag powders in asphalt mixture to replace mineral fillers

Chen, Zongwu; Leng, Zhen; Jiao, Yu‐Yong; Xu, Fang; Lin, Juntao; Wang, Haopeng; Cai, Jun; Zhu, Linlu; Zhang, Yunlong; Feng, Namin; Dong, Yidan; Zhang, Yang

doi:10.1016/j.jclepro.2022.131124

Cited by 34 publications

(24 citation statements)

References 35 publications

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“…The results indicated that the alkalinity values of grayish mineral and yellowish mineral are 2.03 and 1.81. In general, aggregates with higher alkalinity have better adhesion to bitumen [20,21]. Therefore, the greyish mineral has the potential to combine better with bitumen.…”

Section: Xrf Analysismentioning

confidence: 99%

On the Use of Recycled Asphalt and Trinidad Lake Asphalt (TLA) for the Preparation of High Modulus Asphalt Concrete

Li¹,

Zeng²,

Fang³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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Rutting of asphalt pavement occurs earlier and is more serious under the increasingly heavy traffic load conditions that can be found in subtropical monsoon climate regions. High modulus asphalt concrete (HMAC) with excellent anti-rutting and anti-fatigue properties is generally used to mitigate this issue. Given the relatively high cost of the additives used in this type of asphalt, in this study the feasibility of using recycled asphalt mixture (RAP) and Trinidad lake asphalt (TLA) for the preparation of HMAC is considered. The mineral composition of the RAP is first analyzed, then the TLA modified asphalt with different levels of RAP content is used to assess the effect of RAP on the performance of the mixture. Finally, the high-temperature rheological properties of extracted bitumen and the adhesion characteristic between mineral and bitumen are analyzed. The results show that after RAP combustion, the yellowish and greyish minerals display different alkalinity values, while the greyish mineral exhibits an improved ability to combine with bitumen. Thus, RAP can significantly enhance the high-temperature rutting resistance of TLA modified asphalt mixtures. The aged bitumen in RAP makes the mixed binder harder and improves its rheological properties at high temperatures.

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Section: Xrf Analysismentioning

confidence: 99%

On the Use of Recycled Asphalt and Trinidad Lake Asphalt (TLA) for the Preparation of High Modulus Asphalt Concrete

Li¹,

Zeng²,

Fang³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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“…Steel slag based mixtures showed adequate permanent deformation and durable performance [ 21 ]. In addition, the asphalt mixture with steel slag powder fillers showed better resistance to moisture damage, and better low-temperature crack resistance, than asphalt mixtures with limestone filler [ 22 ]. The steel slag powder is presumed to neutralize acidic substances in the phosphogypsum, thereby enhancing the moisture stability of asphalt mixtures in which phosphogypsum is employed as a filler.…”

Section: Introductionmentioning

confidence: 99%

Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture

Wan

Han

et al. 2023

Materials

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This study introduced phosphogypsum coupled with steel slag powder to prepare the phosphogypsum based filler (PF) for asphalt mixture. Penetration, penetration index, softening point, ductility, equivalent softening point, moisture stability of asphalt mortars with different steel slag powder content, filler-asphalt ratio, and PF content were studied. Mechanical properties of PF based asphalt mortar (P-AM) were then analyzed to determine the optimum steel slag content in PF. Overall desirability method was used to determine the optimum replacement ratio of PF content in limestone filler. Rheological properties of P-AM were also analyzed through dynamic shear rheometer. Volumetric performance, high-temperature performance, low-temperature performance, and moisture stability tests were carried out on PF based AC-20 asphalt mixture. Results showed that P-AM presented the optimum performance when the content of steel slag powder was 23% by mass of phosphogypsum. Fatigue and rutting factor of asphalt mortar were enhanced by PF. The optimum PF content in replacing limestone filler was 75% through overall desirability evaluation. PF developed the high-temperature performance and moisture stability of asphalt mixture. Additionally, volumetric and low-temperature performance were not significantly affected by PF. It is suggested that using PF which is based on phosphogypsum as a filler of asphalt mixture to partially replace traditional limestone filler was adequate.

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“…Asphalt pavement and cement pavement are the two most widely used forms of pavement at present. Asphalt pavement was widely used in the construction of high-grade express because of its characteristics such as comfortable driving, low noise and skid resistance [1]. Besides, Asphalt pavement was made of asphalt concrete, with the aggregate accounting for more than 90% of the volume of asphalt concrete [2].…”

Section: Introductionmentioning

confidence: 99%

Water Stability Improvement of Acid Fine Aggregate-Based Asphalt Concrete

Sun¹,

Chu²,

Cheng³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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In general, acid aggregates are not used in combination with asphalt concrete because of their poor compatibility with the asphalt binder, which typically results in a scarce water stability of the concrete. In the present study, the feasibility of a new approach based on the combination of acid granite fine aggregate with alkaline limestone coarse aggregate and Portland cement filler has been assessed. The mineral and chemical compositions of these three materials have first been analyzed and compared. Then, the effect of different amounts of Portland cement (0%, 25%, 50%, 75% and 100% of the total filler by weight) on the mechanical performance and water stability of the asphalt concrete has been considered. Asphalt concrete has been designed by using the Marshall method, and the mechanical performance indexes of this material, including the Marshall stability and indirect tensile strength (ITS), have been measured together with the related water stability indexes (namely the Marshall stability (RMS) and tensile strength ratio (TSR)). The results indicate that the alkaline limestone coarse aggregate and Portland cement filler can balance the drawback caused by the acid granite fine aggregate. The asphalt concrete has good mechanical performances and water stability when the amount of common limestone powder filler replaced by cement is not less than 75%.

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Innovative use of industrially produced steel slag powders in asphalt mixture to replace mineral fillers

Cited by 34 publications

References 35 publications

On the Use of Recycled Asphalt and Trinidad Lake Asphalt (TLA) for the Preparation of High Modulus Asphalt Concrete

On the Use of Recycled Asphalt and Trinidad Lake Asphalt (TLA) for the Preparation of High Modulus Asphalt Concrete

Effect of Phosphogypsum Based Filler on the Performance of Asphalt Mortar and Mixture

Water Stability Improvement of Acid Fine Aggregate-Based Asphalt Concrete

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