scholarly journals Application of Innovative SMA-MA Mixtures on Bridges

2020 ◽  
Vol 10 (19) ◽  
pp. 6958
Author(s):  
Bartosz Budziński ◽  
Paweł Mieczkowski
Keyword(s):  
Bridge Decks ◽  
Permanent Deformation ◽  
Impervious Surface ◽  
The State ◽  
Asphalt Mixtures ◽  
Protective Layers ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt

This paper presents a case study of the application of an innovative asphaltic mixture used for making protective layers on bridges. This mixture, called stone mastic asphalt rich in bitumen mastic (shortened to SMA-MA) produces an impervious surface, resistant to permanent deformation and fatigue, easily produced and laid down on bridge decks. The authors analyzed the state of knowledge on the asphalt mixtures used on bridges. This article describes the first trials with the SMA-MA mixtures and an example of the most spectacular application.

scholarly journals Hybrid Modification of Stone Mastic Asphalt with Cellulose and Basalt Fiber

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
You Huang ◽  
Zhaohui Liu ◽  
Li Liu ◽  
Yunbao Zhang ◽  
Qingxiang Xu
Keyword(s):  
Material Properties ◽  
Permanent Deformation ◽  
Basalt Fiber ◽  
Moisture Damage ◽  
Asphalt Mixtures ◽  
Control Group ◽  
Damage Resistance ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt ◽  
Hybrid Modification

In this study, cellulose and basalt fiber were introduced simultaneously to stone mastic asphalt (SMA) to investigate the effects of hybrid modification on performance improvement of asphalt mixture. The study consists of three parts. The first part investigated material properties of cellulose and basalt fiber, including microscope electrical scanning. The second part conducted a series of tests to evaluate the effects of different combinations of cellulose and basalt fiber on performance. With a total addition of fiber 0.4% by the weight of mixture, five different cellulose-basalt fiber ratios, 0 : 4, 1 : 3, 2 : 2, 3 : 1, and 4 : 0, were introduced to the asphalt mixtures. A series of tests including draindown, permanent deformation, low temperature bending, beam fatigue, and moisture damage resistance were conducted. In the final part, a benefit-cost ratio was designed to help determine the optimum cellulose-basalt fiber combination in the economic aspect. Results show that material properties of the two fibers are very different, including thermostability, modulus, surface, and microstructure, especially oil absorption. In general, all samples with fibers outperformed the control group in all the performance tests. Specifically, cellulose fiber improved draindown, ductility, and fatigue more significantly, whilst basalt fiber has more influence on improving permanent deformation, deflection strength, and stress sensitivity. Equal portion of cellulose and basalt fiber has the best moisture damage resistance. The mechanisms of the two fibers are different, resulting in different performance improvements on asphalt mixtures. Overall, an appropriate combination of the two fibers would produce paving materials with more balanced performance in an economical way.

scholarly journals Evaluation of Warm Rubberized Stone Mastic Asphalt Mixtures through the Marshall and Gyratory Compactors

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 265
Author(s):  
Juan Gallego ◽  
Ana María Rodríguez-Alloza ◽  
Leticia Saiz-Rodríguez
Keyword(s):  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Mechanical Behaviour ◽  
Permanent Deformation ◽  
Warm Mix Asphalt ◽  
Asphalt Mixtures ◽  
Reflective Cracking ◽  
Mastic Asphalt ◽  
Water Sensitivity ◽  
Stone Mastic Asphalt

Stone mastic asphalt (SMA) mixtures exhibit excellent behaviour; they are highly resistant to reflective cracking and permanent deformation, as well as providing the wearing surface with an optimal texture. However, the production and compaction temperatures are similar to conventional mixtures, which means that there is a significant consumption of energy, as well as greenhouse gas emissions. Warm mix asphalt (WMA) technology, which has been developed over the last few years, might allow lower temperatures without compromising the mechanical behaviour of the mixtures. Also, over the last few decades, rubberized asphalt has proved to be effective in improving the performance and being environmentally suitable, but it requires higher production temperatures than conventional mixtures. In this study, several tests were performed to evaluate the effect of a chemical WMA additive on the compactability and water sensitivity of rubberized SMA mixtures with both the Marshall and the gyratory compactor. The investigation has shown that the gyratory compactor is more suitable for studying compactability and the water sensitivity of rubberized SMA with WMA additives.

Permanent deformation performance of binders and stone mastic asphalt mixtures modified by SBS/montmorillonite nanocomposite

2020 ◽  
Vol 239 ◽  
pp. 117700 ◽  
Author(s):  
Alireza Ameli ◽  
Rezvan Babagoli ◽  
Mohammad Khabooshani ◽  
Ramin AliAsgari ◽  
Farhang Jalali
Keyword(s):  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt

scholarly journals Effect of Rubberized Bitumen Blending Methods on Permanent Deformation of SMA Rubberized Asphalt Mixtures

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Herda Yati Katman ◽  
Mohd Rasdan Ibrahim ◽  
Mohamed Rehan Karim ◽  
Suhana Koting ◽  
Nuha Salim Mashaan
Keyword(s):  
Creep Behaviour ◽  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Creep Model ◽  
Materials Testing ◽  
Wet Process ◽  
Test Conditions ◽  
Dynamic Creep ◽  
Different Temperatures ◽  
Stone Mastic Asphalt

This study aims at comparing the permanent deformation of Stone Mastic Asphalt (SMA) rubberized asphalt mixtures produced by the wet process. In this study, rubberized binders were prepared using two different blending methods, namely, continuous blend and terminal blend. To study the creep behaviour of control and rubberized asphalt mixtures, the dynamic creep test was performed using Universal Materials Testing Apparatus (UMATTA) at different temperatures and stress levels. Zhou three-stage creep model was utilized to evaluate the deformation characteristics of the mixtures. In all test conditions, the highest resistance to permanent deformation is showed by the rubberized mixtures produced with continuous blend binders. This study also reveals that the permanent deformation of rubberized mixtures cannot be predicted based on the characteristics of the rubberized binders.

Performance Characterization of Stone Mastic Asphalt using Steel Fiber

2021 ◽  
Vol 02 (02) ◽  
Author(s):  
Ekarizan Shaffie ◽  
◽  
H.A. Rashid ◽  
Fiona Shiong ◽  
Ahmad Kamil Arshad ◽  
...  
Keyword(s):  
Steel Fiber ◽  
Mechanical Performance ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Moisture Susceptibility ◽  
Mastic Asphalt ◽  
Bitumen Content ◽  
Stone Mastic Asphalt ◽  
The Stability ◽  
Marshall Stability

Stone Mastic Asphalt (SMA) is a gap-graded hot mixture designed to provide higher resistance towards permanent deformation and rutting potential by 30% to 40% more than dense-graded asphalt, due to its stable aggregate skeleton structure. However, compared to other types of hot mix asphalt, SMA unfortunately has some shortcomings in term of its susceptibility towards moisture-induced damage due to its structure and excessive bitumen content in the composition. This research aims to assess the performance of a SMA mixture with steel fiber by enhancing overall stability, abrasion resistance, and, most importantly, moisture susceptibility. This study involved the incorporation of various steel fiber proportions of 0%, 0.3%, 0.5% and 0.7% by the total weight of mixture. The steel fiber modified SMA was made up of 6.0% PEN 60/70 bitumen content. The performance of SMA were evaluated through Marshall stability and flow test, Cantabro loss test and indirect tensile strength test. The results obtained from the testing showed that the incorporation of steel fiber is significantly effective to enhance the resistance towards moisture damage, while increasing the stability and reducing the abrasion loss of SMA mixture, compared to conventional mixture. Overall, it can be concluded that the addition of steel fiber in asphalt mixture specifically SMA, has improved the mechanical performance in the application of asphalt pavement with the optimum steel fiber proportion of 0.3% by the weight of mixture. The developed models between the independent variables and responses demonstrated high levels of correlation. The study found that Response Surface Methodology (RSM) is an effective statistical method for providing an appropriate empirical model for relating parameters and predicting the optimum performance of an asphaltic mixture to reduce flexible pavement failure.

Laboratory Evaluation on Steel Slag as Aggregate Replacement in Stone Mastic Asphalt Mixtures

2013 ◽  
Vol 65 (2) ◽  
Author(s):  
Mohd Rosli Hainin ◽  
Gatot Rusbintardjo ◽  
Mohd Azizi Abdul Aziz ◽  
Asmah Hamim ◽  
Nur Izzi Md. Yusoff
Keyword(s):  
Steel Slag ◽  
Asphalt Mixtures ◽  
Laboratory Evaluation ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt
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