Rheological properties of polymer modified bitumen from long-term field tests

Fuel ◽  
2007 ◽  
Vol 86 (7-8) ◽  
pp. 938-948 ◽  
Author(s):  
D. Valtorta ◽  
L.D. Poulikakos ◽  
M.N. Partl ◽  
E. Mazza
Keyword(s):  
Rheological Properties ◽  
Field Tests ◽  
Modified Bitumen ◽  
Polymer Modified Bitumen ◽  
Term Field

Morphology and Rheological Analysis of Nanoclay in Polymer Modified Bitumen

2012 ◽  
Vol 509 ◽  
pp. 155-161 ◽  
Author(s):  
Ji Zhe Zhang ◽  
Martin Van de Ven ◽  
Shao Peng Wu
Keyword(s):  
Particle Size ◽  
Fluorescence Microscopy ◽  
Rheological Properties ◽  
Rheological Behaviour ◽  
Dynamic Shear ◽  
Polymer Particles ◽  
Modified Bitumen ◽  
Rheological Analysis ◽  
Fixed Proportion ◽  
Polymer Modified Bitumen

This paper investigated the influence of nanoclay on the properties of polymer modified bitumen(PMB). The nanoclay-polymer modified bitumen has been produced by mixing a standard 70/100 pen bitumen with polymer at a fixed proportion and then mixed with different amount of nanoclay. The rheological behaviour of the samples have been determined using dynamic shear rheometer. The morphology of the samples as well as the distribution of polymer and nanoclay throughout the bitumen have been characterized with a fluorescence microscopy. The result indicate that the rheological properties of nanoclay-polymer modified bitumens dependent on the percentage nanoclay. The morphology result shows that dispersed polymer particles existed in continuous bitumen phase and the addition of nanoclay does not seem to change the particle size of the polymer.

Effect of cross-linking agents on the rheological properties of polymer-modified bitumen

2015 ◽  
Vol 16 (sup1) ◽  
pp. 349-361 ◽  
Author(s):  
Tirupan Mandal ◽  
Ryan Sylla ◽  
Hussain U. Bahia ◽  
Shayan Barmand
Keyword(s):  
Rheological Properties ◽  
Cross Linking ◽  
Modified Bitumen ◽  
Polymer Modified Bitumen

Long-term field tests of vacuum glazing

Solar Energy ◽  
1997 ◽  
Vol 61 (1) ◽  
pp. 11-15 ◽  
Author(s):  
M. Lenzen ◽  
R.E. Collins
Keyword(s):  
Field Tests ◽  
Vacuum Glazing ◽  
Term Field

scholarly journals Points to be considered in the establishment of long-term field trials

1964 ◽  
Vol 36 (1) ◽  
pp. 51-55
Author(s):  
Yrjö Pessi
Keyword(s):  
Field Tests ◽  
Soil Surface ◽  
Field Trials ◽  
Soil Characteristics ◽  
Test Area ◽  
Test Plot ◽  
Experimental Station ◽  
Term Field

On the basis of the experience gained in the long-term field tests at the Experimental Station of Leteensuo, some of the factors have been examined which have to be taken into consideration when tests of this kind are established. It is noted that in the course of time the soil may become increasingly inhomogeneous, e.g. owing to sludge brought in by inundations, and owing to the wear of the peat on cultivated peat land. An initial shaping of the soil surface is essential in the case of cultivated peat lands because non-uniform settling of the soil may occur in the course of time in the test area. The soil surface of the different test members may also settle in different degrees, depending on the treatment involved in the test. Because of soil transportation from one test plot to another, caused by the tilling operations, the location and shape of the test plots are of significance in long-term tests intended to clarify questions associated with soil characteristics.

scholarly journals Identifying the Long-Term Thermal Storage Stability of SBS-Polymer-Modified Asphalt, including Physical Indexes, Rheological Properties, and Micro-Structures Characteristics

2021 ◽  
Vol 13 (19) ◽  
pp. 10582
Author(s):  
Peng Wang ◽  
Hong-Rui Wei ◽  
Xi-Yin Liu ◽  
Rui-Bo Ren ◽  
Li-Zhi Wang
Keyword(s):  
Phase Separation ◽  
Rheological Properties ◽  
Softening Point ◽  
Storage Stability ◽  
Thermal Storage ◽  
Least Squares Regression ◽  
Modified Bitumen ◽  
Long Term Storage ◽  
Asphalt Performance

The thermal storage stability of styrene–butadiene–styrene tri-block copolymer modified bitumen (SBSPMB) is the key to avoid performance attenuation during storage and transportation in pavement engineering. However, existing evaluation index softening point difference within 48 h (ΔSP48) cannot effectively distinguish this attenuation of SBSPMB. Thus, conventional physical indexes, rheological properties, and micro-structure characteristics of SBSPMB during a 10-day storage were investigated in this research. Results showed that during long-term thermal storage under 163 °C for 10 days, penetration, ductility, softening point, recovery rate (R%), and anti-rutting factor (G*/sinδ) were decayed with storage time increasing. This outcome was ascribed to the phase separation of SBS, which mainly occurred after a 4-day storage. However, ΔSP48 after a 6-day storage met the specification requirements (i.e., below 2.5 °C). Thus, the attenuation degree of asphalt performance in field storage was not effectively characterized by ΔSP48 alone. Results from network strength (I) and SBS swelling degree tests revealed that the primary cause was SBS degradation and base asphalt aging. Moreover, conventional indexes, including penetration, ductility, and softening point, were used to build a prediction model for rheological properties after long-term storage using partial least squares regression model, which can effectively predict I, R, Jnr, G*/sinδ, and SBS amount. Correlation coefficient is above 0.8. G*/sinδ and I at the top and bottom storage locations had high coefficient with SBS amount. Thus, phase separation of SBSPMB should be evaluated during thermal storage.

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