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The Application Study on Lime Fly-ash Crush Stone Base Course of Asphalt Pavements

Author: ZhuXinNian
Tutor: WangChangHeng；WangLiLi
School: Hunan University
Course: Architecture and Civil Engineering
Keywords: Asphalt pavement Semi-rigid base Of lime Mechanical properties Compaction effect Shrinkage cracking prevention
CLC: U416.214
Type: Master's thesis
Year: 2010
Downloads: 55
Quote: 0
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Abstract


Since semi-rigid pavement bearing capacity with high strength , good overall stability and durability and other characteristics , has been a semi- rigid material for the grassroots , asphalt pavement structure is often used in our country road form, but with its depth understanding of its shortcomings are gradually exposed. As its low early strength , impact on traffic early opening ; two gray pellets are more prone to erosion stable Qing plasma phenomena , resulting in the destruction of the road , the impact of road life ; mixture of lime used in the process of formation and strength , because shrinkage cracks caused by temperature changes and temperature changes due to moisture will produce shrinkage cracks , when the asphalt surface layer is thin this crack is often extended to form a reflective surface cracks . So we need to semi-rigid various characteristics were studied . In the semi-rigid base asphalt pavement structure and composition , the mixture of lime in China has been more widely used , in order to improve the long-term life of the asphalt pavement , the paper of the test as the basis for the two gray macadam base materials conduct in-depth research , including: systematically expounded the existing norms and abroad asphalt pavement design methods, standardized design theory are discussed, discussed the design inadequacies ; studied mixture of lime construction process , proposed the construction of lime in the quality control points . Analysis of the mixture of lime formation mechanism and strength characteristics of strength , by experiment , a detailed study of material grading , temperature, cement content and other factors on the impact strength of lime law and made Yueyang two gray crushed stone mix construction points . Through the test, got Aggregate Gradation of lime early compressive strength were investigated ; studied by physical and chemical methods to improve mixture of lime early strength effect ; studied two gray crushed stone Base shrinkage cracking the reason put forward measures to reduce shrinkage cracking grass ; ash combined with two gravel road performance of the construction technology made ??useful suggestions . By orthogonal test method, a lime content , ash content and aggregate content on the degree of compaction of lime were studied on two gray gravel mix design and construction of guiding significance .

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Pavement Engineering > Road : use of the material points > Gravel road,Crushed Stone Base
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