國際會議作報告英語發(fā)言稿.doc

1、國際會議作報告英語發(fā)言稿Thank you,prof.My name is .Im from .I am very pleased to be here to join this forum.The of my presentation is properties of rapid construction materials for soil pavement of field airfield.As is shown in the pture, the main parts of my research are about soil pavement. My presentation wi

2、ll include these four parts:First, some background information about this research; second, the main work we have done; third, some conclusions we have got and the last: innovation and presentation of our published papers. Why I choose this item? I think it can be illustrated from the follog four pa

3、rts.First, the eisting quantity of airfields is still not suffient and the airfields have many shortcomings especially in war time.Second, the complementary facilities, such as highway runways are far less than airfields, however, have more weakness.Third, a certain amount of field airfield is quite

4、 necessary considering some emergencies such as rescue and disaster relief.Forth, the field airfield can fill the void of airfield and they can be combined to be airfield network. The meaning and aim of this research contains three parts.Fast, convenient and validity, fast means the field airfield m

5、ust be constructedas fast as possible, convenient means the construction should need the minimum equipment, labor and materials considering the actual construction condition, validity means the constructed airfield is able to support the operation of ven aircraft in specifally time. Just like many o

6、ther territories, the situation of the research is that the U.S.Army takes advanced line.The U.S.Army declares that they can reach to anywhere on the earth in 96 hours, the most important method for force projection is though aircraft, thus rapid construction of pavement is the key problem for rapid

7、 force transportation. The main work we have done can be summarized as four parts, materials choosing, scheme making, mechanal properties research and water-stable properties research. We choose two kinds of soils, whh are got from ian, Shani province and Jiuquan, Gansu province separately.The sand

8、from Ba River was considerate to investigate the influence of sand to the properties of stabilized soil.The chosen three kinds of powders are cement, lime and new-type stabilizer developed by Changan University.The principles in considering the function of 4 kings of fibers are referring different l

9、ength, type and miing them. On account of the time, I will make a brief description about the eperiment scheme.In summary, three parts were proposed to distinguish the affecting factors in making eperiment scheme.They are powder control, fiber control and other factors.Taking powder control for ele,

10、 the dosage of cement is respectively 6, 8 and 10 when the soil is stabilized only by cement, while the dosage of cement decrease to 3, 5 and 7 when the lime is addted to stabilized soil.The follog two factors are stabilizer and sand. Si kinds of eperiments were performed to investigate the influenc

11、e of above factors to the mechanal properties of stabilized soil.The aim of compaction test is to find the maimum dry density and optimum moisture content.The aim of compression strength test is to determine the optimum dosage of cement, lime, powder stabilizer and fiber, meanwhile evaluating the pe

12、rformance of stabilized soil.The aim of splitting tension strength test is similar to compression strength test, the left pture is sle stabilized by cement, while the right pture is the sle stabilized by fiber and cement.The direct sheer is another important parameter in geotechnal enneering.It infl

13、uences the foundation bearing capacity and many other properties especially for soil base and base course.The left pture shows the course of makingsle and the right pture shows the test process. The CBR test and rebound modulus test are referenced from highway test specifation to evaluating the comp

14、rehensive capacities of each structure level of the pavement.For both the two tests, the left pture shows the course of making sle and the right pture shows the test process.What should be noted is that the number of sle is at least 6, the last result is the average value of these date got from test

15、 after eliminating the bad results. Four kinds of eperiments were performed to investigate the influence of above factors to the water-stable properties of stabilized soil.The scouring test is not the stated eperiment in current specifation.It is performed by us through looking up large quantity of

16、interrelated literature, and two different ways to carry out.The left pture shows the method of vibration table and the right pture shows the method of fatigue test instrument.Penetrant test refers to the eperiment in relating concrete specifation.The left pture shows the process of saturation, the

17、right pture shows the test process. Cantabria test and other tests are all orinal eperiments;they are used in stabilized soil for first time, here I will not develop my narrative. As regards the innovation, I think it throughout the whole research, including materials choosing, scheme making, mechanal and water-stable eperiments.I think it can be drawled from the follog keywords, such as soil choosing, sand, powders, fib