scholarly journals Properties Analysis of Oil Shale Waste as Partial Aggregate Replacement in Open Grade Friction Course

2018 ◽  
Vol 8 (9) ◽  
pp. 1626 ◽  
Author(s):  
Wei Guo ◽  
Xuedong Guo ◽  
Xing Chen ◽  
Wenting Dai
Keyword(s):  
Oil Shale ◽  
Economic Benefits ◽  
Bending Test ◽  
Fine Aggregate ◽  
Splitting Test ◽  
Marshall Test ◽  
Open Graded Friction Course ◽  
Beam Bending ◽  
Strength And Stiffness ◽  
Styrene Butadiene

Open graded friction course (OGFC) is a high permeable mixture used to reduce noise, improve friction. However, limitations with the use of OGFC are due to the relatively low strength and stiffness. Therefore, investigating environmental and economic benefits, as well as service life of OGFC technology is the future of the pavement. In this study, a new modified OGFC (SM-OGFC) was prepared by replacing the fine aggregate below 4.75 mm in OGFC with the oil shale waste (OSW), and the silane coupling agent modifier was used to assist modification. The preparation process of SM-OGFC was optimized by central composite design, to obtain an SM-OGFC with the best mechanical properties. The Marshall test, rutting test, −15 °C splitting test, −10 °C beam bending test, immersion Marshall test, spring-thawing stability test, Cantabro test and permeability test were conducted to evaluate the properties of SM-OGFC. The results prove that SM-OGFC has excellent overall performance in comparison with OGFC and styrene-butadiene-styrene (SBS) modified OGFC. Furthermore, Scanning Electron Microscopy (SEM) observation illustrates that the unique laminar columnar connected structure and cell-like structure antennae of OSW could be the main reasons why SM-OGFC obtained excellent performance. Furthermore, economic analysis indicated that the SM-OGFC mixture had higher cost effectiveness.

scholarly journals Aggregate-Bitumen Interface Enhancement Mechanism of Utilization of Oil Shale Waste as Fine Aggregate in Open Grade Friction Course

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 637 ◽  
Author(s):  
Guo ◽  
Guo ◽  
Chen ◽  
Li ◽  
Li ◽  
...  
Keyword(s):  
Particle Size ◽  
Oil Shale ◽  
Asphalt Binder ◽  
Engineering Application ◽  
Bending Test ◽  
Fine Aggregate ◽  
Reinforcement Mechanism ◽  
Beam Bending ◽  
Indirect Tensile ◽  
Asphalt Mortar

Oil shale waste (OSW), as fine aggregate in the mixture (particle size less than 4.75 mm), can effectively improve the overall properties of open grade friction course (OGFC), but the reinforcement mechanism is not clear. Thus, a comprehensive investigation of the reinforcement mechanism of OSW as fine aggregate is essential to provide better understanding for promoting its engineering application. In this paper, the reinforcement mechanism of OSW was explored through numerical calculations and laboratory tests from three aspects: macroscopic mechanical characteristics of mixture, micromechanics of asphalt mortar containing OSW filler, and adsorption characteristics of OSW. Numerical simulation results showed that the aggregate with a particle size greater than 4.75 mm in OGFC is the skeleton, which is the main loading bearing aggregate, and the skeleton bears more than 85% of external loads. The beam bending test and indirect tensile test results illustrated that the introduction of OSW improves the shear resistance and flexure-tension resistance properties of asphalt mortar, which is beneficial the overall properties of OGFC. From the Brunauer Emmett Tell test and Scanning Electron Microscope test, it was known that OSW has large specific surface area, dense pore structure, and various mesoporous shapes, which means a larger adsorption area and stronger adsorption with asphalt binder. Three self-developed tests containing asphalt adsorption capacity test, infiltrated asphalt saturation test and aggregate-bitumen interface observation test manifested that the existence of “claws”-pointed synapses at OSW-bitumen interface is the main reason for the significant improvement of properties of asphalt mortar containing OSW filler.

Effect of a Chloride Deicing Additive on the Performance of Asphalt Mixture

2014 ◽  
Vol 1049-1050 ◽  
pp. 422-425
Author(s):  
Chao Peng ◽  
Jian Ying Yu ◽  
Jing Dai ◽  
Zhi Jie Zhao ◽  
Jing Yi Fu ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Bending Test ◽  
Rutting Resistance ◽  
Weight Concentration ◽  
Splitting Test ◽  
Wheel Tracking Test ◽  
Beam Bending ◽  
Wheel Tracking ◽  
Test Result

Effect of a chloride deicing additive (Cl-DIA) on the performance of asphalt mixture was investigated by evaluating the moisture, cracking and rutting resistance. Freeze-thaw splitting test result showed that asphalt mixture containing Cl-DIA weakened moisture resistance to some extent but it was still applicable for asphalt pavement. Wheel-tracking test indicated that Cl-DIA evidently improved the rutting resistance of the asphalt mixture and the weight concentration of Cl-DIA in asphalt mixture had to exceed 3%. Beam bending test implied that Cl-DIA did not help for the cracking of the asphalt mixture.

The Research of Durability of Asphalt Concrete Bridge Deck with Little Polyester Fiber Content in Cold Regions

2020 ◽  
Vol 852 ◽  
pp. 41-48
Author(s):  
Xiu Liu ◽  
Xiao Mei Yu ◽  
Chuang Xu ◽  
Jiang Wei Chu
Keyword(s):  
Bridge Deck ◽  
Fiber Content ◽  
Polyester Fiber ◽  
Bending Test ◽  
Experimental Result ◽  
Water Stability ◽  
Concrete Bridge ◽  
Fine Aggregate ◽  
Splitting Test ◽  
Concrete Bridge Deck

In this paper, the common diseases about bridge deck pavement of the completed highway in Heilongjiang province have been made practical investigation and analyze why these diseases happen. It also combines the climate features in north cold areas，from the way of using High quality modified asphalt，reducing the catalytic point temperature of pitch to improve the low temperature anti-crack property, using high strength coarse and fine aggregate，adjusting gradation of mixture aggregate and the ratio of oil to stone to improve temperature and water stability and durability for Concrete pavement project of Nao Li river bridge connected Jian San river with Hu Lin highway .From trabecular bending test、Freeze-thaw splitting test、Rutting test and Immersion Marshall test，that compares different influence research on pavement performance of bridge with Bitumen concrete bridge deck which have different polyester fiber content .The experimental result indicates the proportion of polyester fiber can clearly ameliorate the temperature stability、hypothermia anti-cracking performance and water stability of Asphalt .And within a certain range of polyester fiber content，various road performances will be improved with the increasing of polyester fiber content，and on this basis，the optimum polyester fiber content is raised.

scholarly journals Laboratory Evaluation of the Permeability Durability of Utilization of Oil Shale Waste as Fine Aggregate in Open Grade Friction Course in Seasonal Frozen Regions

2020 ◽  
Vol 10 (1) ◽  
pp. 419
Author(s):  
Wei Guo ◽  
Xuedong Guo ◽  
Xing Chen ◽  
Yingsong Li ◽  
Zhun Li ◽  
...  
Keyword(s):  
Oil Shale ◽  
Engineering Application ◽  
Laboratory Evaluation ◽  
Fine Aggregate ◽  
Essential Difference ◽  
Test Results ◽  
Permeable Pavement ◽  
Open Graded Friction Course ◽  
Porosity And Permeability

Open graded friction course (OGFC), as a highly permeable mixture, has the characteristics of good friction and splash-and-spray reduction during rainstorms. The limitations of the use of such mixtures include the fact that they are affected by poor durability, including strength and permeability durability issues. In a previous study, oil shale waste, as a fine aggregate in the mixture (with a particle size less than 4.75 mm), could effectively improve the overall properties of OGFC, but the permeability durability was not clear. Thus, a comprehensive investigation of the permeability durability of oil shale waste as a fine aggregate is essential to achieving a better understanding in order to promote its engineering application. In this paper, the long-term permeability when using oil shale waste as a fine aggregate in OGFC was systematically investigated based on a self-developed laboratory physical clogging procedure. The test results illustrated the effectiveness of the utilization of oil shale waste as a fine aggregate in terms of permeability durability. A comprehensive index of the clogging coefficient containing mass, porosity and permeability coefficient was proposed based on gray relation entropy theory, the physical clogging model of COF-OGFC (OGFC containing oil shale waste filler) was established and the clogging speed of COF-OGFC was quantified based on the Mistcherlich growth model. The analysis showed that there is an essential difference in the clogging behavior of permeable pavement in the spring and summer. The maximum clogging degree of the permeable pavement in summer is about 40% higher than that in spring, while the clogging rate is much lower than in the spring, at only about 14%, which indicates that the clogging behavior of permeable asphalt pavement in spring is mostly in the rapid clogging mode, and that in summer is mostly in a slow deposition clogging mode. Moreover, the test results showed that the most important influences on the spring clogging behavior of COF-OGFC were the sandy clogging materials and particle sizes ranging from 150 μm to 1180 μm, which can be used to provide a reference for the design of anti-slip sand.

Studies on effect of steel fiber and coarse aggregate on fracture properties of self compacting concrete using wedge splitting test

2019 ◽  
Vol 11 (6) ◽  
pp. 751-767
Author(s):  
Raja Rajeshwari B. ◽  
Sivakumar M.V.N.
Keyword(s):  
Fracture Energy ◽  
Coarse Aggregate ◽  
Peak Load ◽  
Mouth Opening ◽  
Test Method ◽  
Crack Mouth Opening Displacement ◽  
Fine Aggregate ◽  
Content Type ◽  
Fracture Properties ◽  
Splitting Test

Purpose Fracture properties depend on the type of material, method of testing and type of specimen. The purpose of this paper is to evaluate fracture properties by adopting a stable test method, i.e., wedge split test. Design/methodology/approach Coarse aggregate of three different sizes (20 mm, 16 mm and 12.5 mm), three ratios of coarse aggregate, fine aggregate (CA:FA) (50:50, 45:55, 40:60), presence of steel fibers, and specimens without and with guide notch were chosen as parameters of the study. Findings Load-crack mouth opening displacement curves indicate that for both fibrous and non-fibrous mixes, higher volume of aggregate and higher size of coarse aggregate have high fracture energy. Originality/value For all volumes of coarse aggregate, it was noticed that specimens with 12.5 mm aggregate size achieved highest peak load and abrupt drop post-peak. The decrease in coarseness of internal structure of concrete (λ) resulted in the increase of fracture energy.

The Research on SEAM Modified Asphalt under Low Temperature

2012 ◽  
Vol 557-559 ◽  
pp. 850-853
Author(s):  
Ning Zhao ◽  
Yu Long Liu ◽  
Gen Hui Gao
Keyword(s):  
Low Temperature ◽  
Bending Test ◽  
Modified Asphalt ◽  
Splitting Test

Sulfur Extended Asphalt Modified (SEAM) is a newly developed asphalt modifier. The principal purpose of this paper is to study the performance of SEAM modified asphalt under the low temperature. Through the Low-temperature splitting test and the Low-temperature bending test .It indicated that the SEAM enhances the performance of asphalt under the low temperature.

Characteristics of Wear Layered Laston Mix Using Waste Concrete Aggregate

2021 ◽  
Vol 3 (3) ◽  
pp. 459-468
Author(s):  
Yanti ◽  
Rais Rachman ◽  
Alpius
Keyword(s):  
Coarse Aggregate ◽  
Mixture Design ◽  
Concrete Aggregate ◽  
Fine Aggregate ◽  
Waste Concrete ◽  
Characteristic Value ◽  
Marshall Test ◽  
Pavement Material

The research objective focuses on testing the characteristics of the Laston Lapis Aus mixture, the aggregate taken later to be studied is the aggregate of Concrete Waste. The method used in this study included testing the properties of coarse aggregate, fine aggregate and filler, after that the Laston Lapis Aus mixture design was carried out after that the marshall test was carried out while the marshalltest was carried out namely the conventional marshall to get the characteristic value. The results showed that the characteristics of the pavement material in the form of aggregates from Concrete Waste tested the 2018 Bina Marga General Specifications as road layers. Through Marshall testing, the characteristics of the Laston Lapis Aus mixture were abtained with asphalt levels of 5,50%, 6,00%, 6,50%, 7,00%, and 7,50%.

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