scholarly journals Freeze and Thaw Field Investigation of Foamed Asphalt Cold Recycling Mixture in Cold Region

2021 ◽  
pp. e00710
Author(s):  
Han Zhao ◽  
Junda Ren ◽  
Zhuo Chen ◽  
Hai Luan ◽  
Junyan Yi
Keyword(s):  
Field Investigation ◽  
Cold Region ◽  
Foamed Asphalt ◽  
Freeze And Thaw ◽  
Cold Recycling

The Study on Foaming Characteristics of Foamed Asphalt in Cold Recycling Technology

2011 ◽  
Vol 243-249 ◽  
pp. 4293-4296
Author(s):  
Jing Li Liu ◽  
Lian Yu Wei ◽  
Guo Qiang Zhang
Keyword(s):  
Quality Control ◽  
Theoretical Basis ◽  
Asphalt Mixture ◽  
Construction Process ◽  
Environment Protection ◽  
Effect Evaluation ◽  
Construction Period ◽  
Foamed Asphalt ◽  
Recycling Technology ◽  
Cold Recycling

Through the foaming mechanism and foaming effect evaluation, this paper analyzes the production procedure, optimum content and strength of foamed asphalt mixture thoroughly. Combined with the construction process quality control and inspection and acceptance criteria, this paper provides data for reference and theoretical basis for application of cold recycled technology of foamed asphalt to pavement project. Its construction without disrupting traffic, thus shorten the construction period and improve efficiency, which also have advantages such as energy conservation, environment protection and economy. Above all, it is beneficial to foamed asphalt′s popularization and application.

Experimental Study on Foamed Asphalt Warm Mix Technology

2014 ◽  
Vol 919-921 ◽  
pp. 1110-1114
Author(s):  
Ying Biao Wu ◽  
Jin Jin Shi ◽  
Chen Fang Yang ◽  
Sheng Xia Song
Keyword(s):  
Evaluation Method ◽  
Asphalt Mixture ◽  
The Road ◽  
Foamed Asphalt ◽  
Outdoor Experiment ◽  
Road Performance ◽  
Cold Recycling ◽  
Lower Temperature ◽  
Specification Requirement ◽  
Better Than

Usually, foamed asphalt as cold recycling mixture binder, study on foamed asphalt warm mix technology was limited in China. Aimed at the asphalt foaming characteristic, the paper put forward the best asphalt foaming condition and carried out indoor and outdoor experiment to study the road performance of warm mixed asphalt mixture. The paper proposed the maturation curing time concept and its evaluation method. Results indicated that the warm mixed asphalt mixtures road performance can meet the HMA specification requirement in a lower temperature of construction, and low-temperature crack resistance was better than the tradition hot mix asphalt mixture so the warm mix foamed mixture has a remarkable economic and society benefit.

Recycled Technology of Urban Road Construction Waste and Miscellaneous Fill Used as Subgrade Fillings

2011 ◽  
Vol 250-253 ◽  
pp. 3460-3464 ◽  
Author(s):  
Bing Kang Liu ◽  
Jin Song Fan ◽  
Hui Min Hu ◽  
Li Hui Fu
Keyword(s):  
Road Construction ◽  
Field Investigation ◽  
Environment Friendly ◽  
Soil Resource ◽  
Construction Waste ◽  
Urban Road ◽  
Treatment Techniques ◽  
Cold Recycling ◽  
Engineering Projects ◽  
Typical Soil

Continuously increasing municipal renovation and roadbed excavation produced a considerable quantity of solid waste each year such us miscellaneous fill mixed with broken pavement fragments and brickbats, which resulted in a series of urban environment and soil resource issues. Comprehensive recycling technology for soil modification to attain the strength requirements of subgrade fillings from the related road construction codes is necessary and even urgent, since the usual soil replacement is not the economic and environment-friendly method. The field investigation and laboratorial tests hereby had been completed to confirm the application potentials of typical soil specimens selected from different locations. The experimental results indicate some of specimens can be reused as subgrade fillings in road construction immediately and others should be treated by soil amelioration. To further certify the practicality of this recycled technology and broaden its range of application, three typical reutilization and treatment techniques, cold recycling, soil solidification and dynamic consolidation are introduced into engineering projects.

Study of the Bulk Index Measuring Methods on Foamed Asphalt Cold Recycling Specimens

2014 ◽  
Vol 584-586 ◽  
pp. 1939-1943
Author(s):  
Lu Chuan Chen ◽  
Wei Niu
Keyword(s):  
Specific Density ◽  
Measuring Methods ◽  
Foamed Asphalt ◽  
Cold Recycling ◽  
Saturated Surface

For the foamed asphalt cold recycling mixture,we mould the specimens under two different gradation using Marshall compaction method.Then we measure the bulk specific density using the volumetrical method, the corelock method, the wax-sealing method and the saturated surface dry method, calculate the porosity and compare the results.The conclusion is that the results are almost the same under the corelock method, the wax-sealing method and the saturated surface dry method, we can choose the saturated surface dry method to gain the porosity in practical use.

Laboratory Study on Cold Recycling with Foamed Asphalt

2011 ◽  
Vol 250-253 ◽  
pp. 3449-3453 ◽  
Author(s):  
Li Ying Yang ◽  
Yi Qiu Tan ◽  
Hao Liu ◽  
En Guang Li
Keyword(s):  
Laboratory Study ◽  
Rapid Development ◽  
Highway Construction ◽  
Asphalt Mixture ◽  
Recycled Asphalt ◽  
Foamed Asphalt ◽  
Technical Requirements ◽  
Cold Recycling

With the rapid development of highway construction and rehabilitation, more and more waste asphalt mixture is produced. The waste is under great environment pressure. The reuse of the waste is urgent. Foamed asphalt cold recycling is a solution. In this paper, the foaming abilities of different kinds of asphalts are tested and the best foaming asphalt is found out. Then, the RAP is evaluated. Finally, the properties of the cold recycling mixture are studied. As a comparison, two different gradations with different amount of RAP are designed and their performances are evaluated. By all these tests, it is illustrated that the cold recycled asphalt mixture with foamed asphalt can fulfill all the technical requirements. The foamed asphalt mixture began its first use in Beijing and exhibits well.

Effects of Mineral Additives on Cold Recycled Foamed Asphalt Mixtures Cured in Laboratory and Field Conditions

2018 ◽  
Vol 2672 (26) ◽  
pp. 134-143 ◽  
Author(s):  
Wangyu Ma ◽  
Randy C. West ◽  
Nam Tran ◽  
Brian K. Diefenderfer ◽  
Chen Chen
Keyword(s):  
Fly Ash ◽  
Hydrated Lime ◽  
Asphalt Mixtures ◽  
Pavement Rehabilitation ◽  
Curing Conditions ◽  
Foamed Asphalt ◽  
Mineral Additive ◽  
Simulated Condition ◽  
Cold Recycling ◽  
Mineral Additives

Cold recycling with foamed asphalt has been considered a sustainable pavement rehabilitation technology. During the mix design process, the dry and wet indirect tensile strengths (ITS) and tensile strength ratio (TSR) are important parameters for evaluating performance of a cold mix. These performance parameters can be significantly influenced by the type of mineral additive used in the mixture and conditions in which test specimens are cured before testing. In this study, the objective was to determine the effects of mineral additives on the dry and wet ITS and TSR results of the cold recycled foamed asphalt mixtures in laboratory- and field-curing conditions. Mixtures with four different additives (cement, hydrated lime, baghouse fines, and Class C fly ash) at varied contents were compared to a control mixture without a mineral additive. Specimens were cured in the laboratory and in a field-simulated condition. The results from laboratory curing show that cement and hydrated lime improved both the dry and wet ITS results. Baghouse fines increased the dry ITS but not the wet ITS, while the fly ash only enhanced the wet ITS. Higher additive contents did not improve dry or wet ITS results, except for cement. The field-simulated curing results show all the additives improved the dry ITS over long periods of time but were not effective in the short term. The ITS results from long-term field-simulated curing and laboratory curing ranked these mixtures similarly. Confinement during curing did not have a significant effect on the dry ITS.

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