Experimental Research on Performance Change Regularity of Road Asphalt with Multiple Aging and Regeneration

2013 ◽  
Vol 684 ◽  
pp. 144-149
Author(s):  
Ping Liu ◽  
Yi Hua Nie ◽  
Yun Long Zhang
Keyword(s):  
Experimental Research ◽  
Performance Index ◽  
Asphalt Pavement ◽  
Experimental Results ◽  
Road Asphalt ◽  
Performance Change ◽  
Aging Test ◽  
Multiple Recycling ◽  
At Home

Due to the use course limitation of asphalt pavement at home and abroad, research on road asphalt recycling is laid particular stress on an aging regeneration properties both in China and abroad at present, and research on multiple aging and regeneration is much less. In this paper, five heating tests of 40 min, 85 min, 180 min, 240 min, 300 min were carried on to simulate asphalt aging , and reentry another same time aging after regeneration for each aging asphalt, so reciprocating cycle five times, each group of sample use the same reclaiming agent to regenerate NO.70# road asphalt after every aging test. The experimental results show that: after aging regeneration many times, performance index of NO.70 road asphalt can return to no age level, namely the asphalt multiple recycling is completely feasible.

Research Progress on Aging of Polymer Modified Asphalt

2011 ◽  
Vol 71-78 ◽  
pp. 5038-5041
Author(s):  
Chang Qing Fang ◽  
Min Zhang ◽  
Jing Bo Hu ◽  
Ying Zhang ◽  
Rui En Yu
Keyword(s):  
Asphalt Pavement ◽  
Present Situation ◽  
Research Progress ◽  
Pavement Performance ◽  
Modified Asphalt ◽  
Aging Mechanism ◽  
Characterization Techniques ◽  
Aging Properties ◽  
Polymer Modified Asphalt ◽  
At Home

Asphalt aging is inevitable to the asphalt pavement performance, which will lead asphalt to hardening gradually and becoming brittle. Therefore, aging progress shortens the life of asphalt, but the study on polymer asphalt improves the phenomenon. The present situation on aging of polymer modified asphalt is summarized and the aging mechanism of modified asphalts is analyzed in the paper. Otherwise, the research progress at home and abroad on the aging properties of modified asphalt is introduced by a series of characterization techniques, which include mechanics technique, rheology technique, FTIR, GPC and so on

Experimental Research to Evaluate Thermal Behavior of a Brushless Driving Servomotor for Linear Motion NC Axis Experimental Stand

2015 ◽  
Vol 762 ◽  
pp. 55-60
Author(s):  
Georgia Cezara Avram ◽  
Florin Adrian Nicolescu ◽  
Radu Constantin Parpală ◽  
Constantin Dumitrascu
Keyword(s):  
Thermal Behavior ◽  
Mathematical Models ◽  
Experimental Research ◽  
Infrared Imaging ◽  
Experimental Results ◽  
Ball Screw ◽  
Linear Motion ◽  
Functional Optimization ◽  
Thermal Infrared Imaging ◽  
Experimental Stand

This paper presents the works carried out by the authors in the field of structural and functional optimization of industrial robot's numerically controlled (NC) axes. The study includes the results obtained in the research stage of the experimental measurements performed to evaluate the electrical servomotor's thermal behavior using a thermal (infrared) imaging camera. The analyzed servomotor is a brushless servomotor integrated in an experimental stand for linear motion NC axis experimental research, existing in the MMS department from EMTS faculty. Supplementary to the driving servomotor, the experimental stand includes a belt drive transmission, a ball screw - bearings assembly and a driven element guided by ball rail system. This experimental research phase is part of the doctoral thesis of first author and was conducted in order to validate the mathematical models developed in the PhD thesis. Thus, experimental results presented in the paper have been used to validate first mathematical models for electric motor's preliminary selection and checking, (performed by determining the total reflected inertia of the mechanical system on motor shaft level) as well as the mathematical models for final selection and checking (by evaluating the servomotor's thermal energy dissipation, and servomotor's internal and external maximum operating temperature). Second, the experimental results have been used to validate the assisted simulation for structural and functional optimization of industrial robot's NC axes based on both servomotor and drive's thermal behavior analysis, performed in the thesis by means of a dedicated commercial software package.

Experimental Research on Rotating Skimmer

2003 ◽  
Author(s):  
Minoru Chino ◽  
Kenji Takizawa ◽  
Takashi Yabe
Keyword(s):  
Experimental Research ◽  
Rotational Speed ◽  
Rotation Speed ◽  
Experimental Results ◽  
Injection System ◽  
Benchmark Test ◽  
Injection Speed ◽  
Structure Interaction ◽  
Wide Range ◽  
Computer Codes

This paper provides the experimental results on skimmer and gives some detailed information useful for benchmark test of computer codes that are now able to simulate the fluid-structure interaction. For this purpose, we specially designed the injection system that imposes reproducible rotational speed and injection speed on the skipper. The effect of rotation is discussed by changing rotation speed in a wide range.

Experimental Research on the Magnetic Field Sensitive Polymeric Actuator

2011 ◽  
Vol 287-290 ◽  
pp. 603-607
Author(s):  
Chun Lin Xia ◽  
Yang Fang Wu ◽  
Qian Qian Lu
Keyword(s):  
Magnetic Field ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Energy Conversion ◽  
Experimental Research ◽  
Experimental Results ◽  
Deformation Characteristics ◽  
Analysis Software ◽  
Element Analysis ◽  
The Magnetic Field

Using domestic MFSP membrane as a medium of energy conversion, a kind of MFSP actuator was designed. The dedicated test equipment was constructed for experimental research, and the experimental results were given. The strip and circular MSFP membrane were analyzed qualitatively to obtain the deformation characteristics of membrane by finite element analysis software.

Studies on the Influence of Sintering Parameters on the Hardness and Impact Energy of Some Sintered Steels Alloyed with Copper Powders

2015 ◽  
Vol 1128 ◽  
pp. 80-87
Author(s):  
Claudiu Nicolicescu ◽  
Iulian Ştefan ◽  
Victor Horia Nicoară
Keyword(s):  
Experimental Research ◽  
Impact Energy ◽  
Copper Content ◽  
Argon Atmosphere ◽  
Experimental Results ◽  
Sintered Steels ◽  
Copper Powders ◽  
Carburizing Process

The paper presents experimental results regarding the evolution of hardness and impact energy of some sintered steels alloyed with 1.5% respective 3% (weight) copper powders. For the experimental research were used 3 mixtures: Fe+0.2C as reference, Fe+0.2C+1.5Cu, Fe+0.2C+3Cu. All the samples were die pressed at three pressures 400, 500 and 600 MPa and were subjected at three types of treatments as following: SINT, SINTCARB and CARBSINT. For the sintering treatments was used argon atmosphere and for carburizing process was used methane. After each treatment the hardness and impact energy for all the samples were measured and were made correlations between these properties and the type of treatment and copper content.

The Research of the Chemistry Composition of High Temperature Oxidization under Loads for the Cr5Mo Alloy

2011 ◽  
Vol 694 ◽  
pp. 729-732
Author(s):  
Shun Qing Chen ◽  
Yu Min Ma
Keyword(s):  
High Temperature ◽  
Experimental Research ◽  
Experimental Results ◽  
The Difference

The chemistry composition of the high temperature oxidization under loads has been analyzed for the Cr5Mo alloy in this paper. The experimental research to the Fe, Cr and O elements have also been done. The difference between loads and no loads has been emphasized to the chemistry elements of the Cr5Mo alloy. The experimental results showed that the temperature couldn’t change the rate of the chemistry elements, but the loads could change them. The chemistry elements Fe ，Mo and Cr could change more obvious than other elements of the Cr5Mo alloy in this paper.

scholarly journals Numerical analysis of the impact of removing a corner column in a continuous slab-column structure in relation to the experimental model

2020 ◽  
Vol 310 ◽  
pp. 00054
Author(s):  
Miroslaw Wieczorek
Keyword(s):  
Numerical Analysis ◽  
Numerical Modelling ◽  
Experimental Model ◽  
Experimental Research ◽  
Experimental Results ◽  
Numerical Calculations ◽  
Column Structure ◽  
Continuous Slab ◽  
The Impact ◽  
Model Support

The paper presents the numerical analysis of the impact of removing a corner column on the behavior of a continuous slab-column structure. The model uses the minimal reinforcement amount compliant with Eurocodes. The basis for numerical modelling was the experimental research of a piece of a slab-column structure with the dimensions of 3.0×3.0 m in column axes. The article includes a detailed description of the assumed conditions of the model support, the method of loading and reading of the results. The paper also compares the obtained results of numerical calculations with experimental results.

Experimental Research on Influences on Mechanical Property of C50 Waterproof Concrete by Basalt Fiber

2013 ◽  
Vol 834-836 ◽  
pp. 755-761
Author(s):  
Hai Liang Wang ◽  
Hai Yang Guo ◽  
Xin Lei Yang ◽  
Quan Chang Ren ◽  
Peng Dong
Keyword(s):  
Mechanical Property ◽  
Experimental Research ◽  
Brittle Failure ◽  
Fracture Resistance ◽  
Test Specimen ◽  
Polypropylene Fiber ◽  
Basalt Fiber ◽  
Experimental Results ◽  
Regular Patterns ◽  
Failure Character

The experiment discussed influences of basalt fiber with different adulterate amount to the compressive and fracture resistance properties of waterproof concrete C50. We also made comparison between experimental results and mechanical property of polypropylene fiber waterproof concrete. The experimental results demonstrated that the brittle failure character of waterproof concrete has been improved to some extent, and the compressive and fracture resistance strength of the test specimen has increased apparently after adulterating basalt fiber and polypropylene fiber. Furthermore, it is mainly unanimous of the influence regular patterns of basalt fiber and polypropylene fiber to waterproof concrete when adulterating the same amount.

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