Fracture behavior of a sustainable material: Recycled concrete with waste crumb rubber subjected to elevated temperatures

2021 ◽  
pp. 128553
Author(s):  
Yunchao Tang ◽  
Wanhui Feng ◽  
Zheng Chen ◽  
Yumei Nong ◽  
Shuhong Guan ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
Elevated Temperatures ◽  
Crumb Rubber ◽  
Recycled Concrete ◽  
Sustainable Material ◽  
Waste Crumb Rubber

Recycling of waste crumb rubber into a commercial materials

2021 ◽  
Author(s):  
S. Godwin Barnabas ◽  
K. Arun Vasantha Geethan ◽  
M. Venkatesh Perumal
Keyword(s):  
Crumb Rubber ◽  
Waste Crumb Rubber

Ductility and Fracture Behavior of Polycrystalline Ni3Al Alloys

1986 ◽  
Vol 81 ◽  
Author(s):  
C. T. Liu
Keyword(s):  
Fracture Behavior ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Grain Shape ◽  
Tensile Ductility ◽  
Dynamic Effect ◽  
Al Alloys ◽  
Gaseous Oxygen ◽  
Comprehensive Review ◽  
Room Temperature Ductility

AbstractThis paper provides a comprehensive review of the recent work on tensile ductility and fracture behavior of Ni3AI alloys tested at ambient and elevated temperatures. Polycrystalline Ni3Al is intrinsically brittle along grain boundaries, and the brittleness has been attributed to the large difference in valency, electronegativity, and atom size between nickel and aluminum atoms. Alloying with B, Mn, Fe, and Be significantly increases the ductility and reduces the propensity for intergranular fracture in Ni3 Al alloys. Boron is found to be most effective in improving room-temperature ductility of Ni3Al with <24.5 at. % Al.The tensile ductility of Ni3Al alloys depends strongly on test environments at elevated temperatures, with much lower ductilities observed in air than in vacuum. The loss in ductility is accompanied by a change in fracture mode from transgranular to intergranular. This embrittlement is due to a dynamic effect involving simultaneously high localized stress, elevated temperature, and gaseous oxygen. The embrittlement can be alleviated by control of grain shape or alloying with chromium additions. All the results are discussed in terms of localized stress concentration and grain-boundary cohesive strength.

Fracture Behavior of Ultrafine-Grained Titanium Under Tension at Elevated Temperatures

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
S. V. Sajadifar ◽  
H. J. Maier ◽  
T. Niendorf ◽  
G. G. Yapici
Keyword(s):  
Fracture Behavior ◽  
Elevated Temperatures ◽  
Rate Sensitivity ◽  
Void Coalescence ◽  
Strain Rates ◽  
Enhanced Diffusion ◽  
Deformation Response ◽  
Ultrafine Grained ◽  
Highly Sensitive ◽  
Comprehensive Recovery

Abstract This investigation focused on the deformation response and microstructural changes of severely deformed titanium during post-severe plastic deformation tension, at temperatures of 300–600 °C and at strain rates of 0.001–0.1 s−1. The obtained results suggest that SPD enhances the strength of grade 4 titanium up to 500 °C. At above 600 °C, the severely deformed microstructure showed comprehensive recovery. Severely deformed titanium was seen to be highly sensitive to the deformation rate, where strain rate sensitivity increased with the increase of test temperature. Analysis of fracture surfaces reveals that at elevated temperatures, growth of dimples and void coalescence occurs due to the enhanced diffusion rate and occurrence of recrystallized grains.

scholarly journals Influence of Guayule Resin as a Bio-Based Additive on Asphalt–Rubber Binder at Elevated Temperatures

Recycling ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 38 ◽  
Author(s):  
Ahmed Hemida ◽  
Magdy Abdelrahman
Keyword(s):  
Rheological Properties ◽  
Elevated Temperatures ◽  
Thermo Gravimetric Analysis ◽  
Crumb Rubber ◽  
Environmental Concerns ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
Asphalt Cement ◽  
Asphalt Rubber ◽  
Liquid Phases

This study seeks to find the influence of replacing a portion of the asphalt–rubber binder with the bio-based material “guayule resin.” This replacement could be beneficial in terms of sustainability, economics, and environmental concerns related to the asphalt industry. Nine asphalt–rubber–guayule binders were investigated to find their rheological properties. Consecutively, the study proceeded with five selected binders being compared to the original asphalt (PG64-22). Investigations underwent whole matrices (crumb rubber modifier (CRM) residue included) and liquid phases (CRM residue extracted). Additionally, these properties were partially sought for their corresponding asphalt–rubber binders to compare and judge the contribution of the guayule resin. Likewise, a thermo-gravimetric analysis was done for the guayule resin to recognize its moisture and composition complexity. Such an analysis was also done for the as-received CRM and some extracted CRMs to determine the release and residue of rubber components. Outcomes showed that the guayule resin has the potential to compensate the performance required against the original asphalt at elevated temperatures while greatly decreasing the asphalt cement proportion. For instance, a blend of 62.5% asphalt, 12.5% CRM, and 25% guayule resin provided better performance than that of the original asphalt.

Polymer Based Treatments Applied on Recycled Concrete Aggregates

2013 ◽  
Vol 687 ◽  
pp. 514-519 ◽  
Author(s):  
Valerie Spaeth ◽  
Assia Djerbi Tegguer
Keyword(s):  
Material Flow ◽  
Recycled Concrete ◽  
Recycled Aggregates ◽  
Hardened Concrete ◽  
Sustainable Material ◽  
Concrete Aggregates ◽  
Recycled Concrete Aggregates

The recycling of concrete, bricks and masonry rubble as concrete aggregates is an important way to contribute to a sustainable material flow. However, there are still various uncertainties limiting the widespread use of recycled concrete aggregates (RCA). The fluctuations in the composition of grade recycled aggregates and their influence on the properties of fresh and hardened concrete are of particular concern regarding the use of RCA. So, the reuse of RCA is still limited. That’s why an efficient polymer based treatment is proposed in order to reuse RCA easier.

A SHORT REVIEW ON USING CRUMB RUBBER AS MODIFICATION OF BITUMEN BINDER

2016 ◽  
Vol 78 (7-3) ◽  
Author(s):  
Md. Maniruzzaman A. Aziz ◽  
Zohair Ahmed Altieb ◽  
Khairul Anuar Bin Kassim ◽  
Hauwa Baffa Jibrin
Keyword(s):  
Heavy Traffic ◽  
Influencing Factor ◽  
Road Construction ◽  
Short Review ◽  
Crumb Rubber ◽  
High Viscosity ◽  
Wet Process ◽  
Physical Tests ◽  
On The Road ◽  
Waste Crumb Rubber

The increasing consumption of waste tire has generated many problems such as increasing landfill space, environmental pollution and causing health hazards. Parallel to this is the increasing of roads construction as a result of heavy traffic on roads. This study reviews to the use of crumb rubber (waste tires in powder form) in bitumen using the wet process. The study focuses on the crumb rubber as a replacement to the total weight of bitumen. The design or life span for all highways and urban roads is 10 – 20 years. Unfortunately, damages or distresses on pavements are still occurring before reaching the maximum period of the designed road serviceability. Among the major influencing factor that is contributing to this distress is the repeated heavy traffic loading on the road surfaces. Moreover, the use of waste crumb rubber in road construction as a pavement surface has a better skid resistance, fatigue crack resistance and increased rut resistance. The review includes physical tests that are used to determine the physical properties of bitumen and modified crumb rubber mix. The physical tests involve penetration test, softening point test and viscosity test. The second stage is rheological tests like rolling thin film oven test (RTFOT), pressure aging vessel (PAV) and dynamic shear rheometer (DSR) tests. The expectations from the study are to develop bitumen with waste crumb rubber that would minimize the costs of bitumen and providing better physical and rheological properties compared to the convention bitumen based on the tests that was conducted. Crumb rubber modifier as improved resistance to rutting due to high viscosity, Improved resistance to surface initiated, reduce fatigue/ reflection cracking, lower pavement maintenance costs, and saving in energy and natural resource.

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