Experimental Study On Service Performance Of Alkali Resistance Bunched Glass Fiber Reinforced Concrete And Polypropylene Geotextile

Fiber reinforced concrete and geotextiles have been widely used in large-scale road projects,airport runways in recent years,which can significantly improve the strength and appearance quality of buildings and maximize the service life of pavements,bridge piers and other buildings.Nevertheless,fiber reinforced concrete and geotextiles cannot avoid the effects of natural environments including light,heat,acid and alkali and influences of their different loads by normal using.Consequently,the quality and life of concrete components was affected.Based on the above problems,this paper focused on the research and development of the domestically introduced a alkaliresistant bunched glass fiber reinforced concrete and the latest high strength coarse denir polypropylene spunbonded needle punctured geotextile,which have been subjected to alkali-resistant bunched glass fiber reinforced concrete fatigue and impact resistance and geotextile durability,which have been subjected to geotextile durability and alkali-resistant bunched glass fiber reinforced concrete fatigue and impact resistance.Main research works can be summarized as follows:(1)The basic property of geotechnical materials and fiber reinforced concrete materials and application in project are simply discussed;the experiments and theories research of fiber concrete fatigue resistance and impact resistance and aging performance of geotechnical materials were viewed and organized.(2)Based on the effect of alkali-resistant bunched glass fiber reinforced concrete on the fatigue performance,the bending fatigue characteristics of alkali-resistant bunched glass fiber reinforced concrete with different stress levels and different volumetric rates are studied.In addition,the difference of bending fatigue life between alkali-resistant bunched glass fiber and steel fiber and coarse polypropylene fiber reinforced concrete were compared.(3)According to the existing research methods,the fatigue equations of plain concrete and alkali-resistance bunched glass fiber reinforced concrete were obtained through linear fitting by using the relevant fatigue test data obtained on the test.Correlativity of bending fatigue equation and fatigue test data of fiber reinforced concrete obtained by fitting is judged by correlation coefficient R(4)Experiments were conducted on the impact resistance properties of alkaliresistant glass fiber of high zirconium and coarse polypropylene fiber reinforced concrete slabs with different volume fraction contents.From the dynamic point of view,the improvement effects of fiber type and fiber volume fraction on the impact resistance of concrete slab were studied through the failure morphology of the specimen,the acceleration time history of the drop hammer and the reaction time history curve of the bearing at the bottom,combined with the impact damage process of the whole specimen recorded by the high-speed camera.(5)To study the property of aging resistance and chemical corrosion resistance of high strength coarse denir polypropylene spunbonded needle punctured geotextile(HPP),which is newly developed and produced in China.The test is demonstrated by thermal oxygen aging,acid and alkali corrosion,and pure water soaking,which conducted individually to test the loss rate and fracture strength loss rate of geotextiles after different periods of time.The differences in long-term performance of HPP geotextiles and common polypropylene geotextiles(PP)are compared.(6)The expression of the thermal oxygen reaction rate of the HPP geotextile which considering the strength change rate of geotextiles at different testing temperatures was given based on the Arrhenius.Then,according to the average annual temperature in Beijing,the strength retention rate of the HPP geotextile which used for 50 years can be predicted.