Liu J.,PLA Air Force Aviation University |
Weng X.,PLA Air Force Aviation University |
Zhang J.,PLA Air Force Aviation University |
Lu C.,The Second Engineering Brigade of Chinese Airport Construction |
And 2 more authors.
Jianzhu Cailiao Xuebao/Journal of Building Materials
In order to investigate the reasonable pavement structure for rapid construction of airstrip, the performance of fiber grid-cement soil runway base has been researched through a large number of inside geotechnical experiments and full scale tests. Inside geotechnical experiments results are shown to be as follows: the 7d dry unconfined compression strength of 10% and 12%(by mass) cement soil reach around 3MPa, while saturated unconfined compression strength reach up to 2MPa, and the water stability coefficient reach to 70%. It shows that, the strength characteristic and water stability of cement soil can satisfy the construct demand of airstrip. Full scale test results show that: glass fiber grid improves the holistic elastic modulus of pavement; significantly reduces the drying shrinkage crack and effectively controls the crack development. Holistic elastic modulus runs up to 190.68-435.08 MPa at different periods, the increase margin up to 17.5%, and the rebound deflections less than 1mm under ten thousands traffic times. Contrast test shows that glass fiber grid-cement soil base can meet the construction and operation requirements of airstrip with strong bearing capacity, good deformation resistance, and high integrity. ©, 2014, Tongji University. All right reserved. Source