外文文献及译文--玻璃纤维对于沥青稳定性影响的研究

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1、 中文 2510 字 毕 业 设 计 外文资料翻译 系 别： 土木工程系 班 级： 姓 名： 指 导 教 师： 1 一 .英文原文 A STUDY ON THE EFFECT OF GLASS FIBRE ON THE STABILITY OF BITUMINOUS MIXES S. JAYALEKSHMI1 and N. ANJANEYULU ABSTRACT: Surface cracking of pavements decreases its fatigue response. The inclusion of glass fibre in bituminous mixes incre

2、ases the fatigue life of pavements. In the current investigation E glass fibre is mixed with the bituminous mixes and Marshall Stability test was conducted. The optimum bitumen content and flow value were evaluated. The influence of this glass fibre on durability and the engineering properties of se

3、mi dense bituminous concrete such as stability, flow, air voids in the mix, voids in mineral aggregates and voids filled with bitumen are presented in this paper. The stability values increased by as much as 32%. KEYWORDS: Fibre Glass, Bituminous Mixes, Marshall Stability Test, Stability, Flow Value

4、 1. INTRODUCTION The low tensile strength of bituminous mixes causes the pavement subjected to repeated loading to crack. The propagated cracks develop distress symptoms like raveling, undulations, rutting, cracking, bleeding, shoving and potholing of bituminous surfacing. The high traffic intensity

5、 of commercial vehicles also compounds this problem. Hence, to improve the performance of the pavements, reinforcements and additives are added to the bituminous mixes. Therefore, there arises a necessity to evaluate the optimum fibre content and the type of fibre. The fibres placed in the bituminou

6、s mix are homogeneously dispersed and act as stress absorbing layers. In the recent past, cotton, metal wire and asbestos were used. Cotton is degradable and cannot be used as long term reinforcement； metal wire rusts when water penetrates. Asbestos poses health hazard. This automatically leads to t

7、he choice of glass fibre. Transportation is the lifeline of any nations economy and hence improving the performance of the pavements indirectly boosts the economy. 2 2. REVIEW OF LITERATURE Freeman (1978) found that the incorporation of polyester fibre as a reinforcement in the surface course, reduc

8、es reflective cracking. The effect was studied by varying the diameter, length and percentage of the polyester fibre. Gokhale (1987) carried out studies on reinforced bituminous surfaces with fibre glass sheet and Teflon sheets and with five types of gradations of mineral aggregates. Kim (1999) eval

9、uated the performance of polymer - modified (polypropylene film and a grid) bituminous mixtures and specially designed reinforcing technique against reflective cracking for typical bituminous pavement over layers. The wheel tracking test was used to investigate durability aspects such as the plastic

10、 flow resistance and crack resistance of the geogrid reinforced bituminous mixtures by Komatsu(1998). The material used was a high strength, high modulus polyoxymethylene fibre. As per Lytton (1989), the use of geotextiles in bituminous overlays enhances reinforcing, strain relief and under sealing.

11、 The reflection cracking caused by the loads and thermal contraction was arrested by the use of geotextile reinforcement. Maurer (1989) determined the effectiveness of various geotextiles and fibres in retarding the reflective crack formation in bituminous overlay. The fatigue life and the rut resis

12、tance also improved. The cheapest type of glass fibre available commercially is the E-Glass Fibre and this material is used in the present study as reinforcement within the bituminous mix. 3. LABORATORY STUDY 3.1 MATERIAL PROPERTIES 3.1.1 Glass Fibre The properties of the E-Glass Fibre used are as listed in Table 1. 3.1.2 Aggregate