|Table of Contents|

Mixture component design of skeleton-closed lime-fly-ash stabilized aggregate and its performance(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2010年05期
Page:
22-26
Research Field:
Publishing date:
2010-10-20

Info

Title:
Mixture component design of skeleton-closed lime-fly-ash stabilized aggregate and its performance
Author(s):
HU Li-qun;  SHA Ai-min
Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China
Keywords:
road engineering;  skeleton-closed type structure;  lime-fly-ash stabilized aggregate;  mixture component design;  mechanical performance;  shrinkage coefficient
PACS:
U414.1
DOI:
-
Abstract:
In order to use skeleton-closed lime-fly-ash stabilized aggregate more effectively, this paper presents coarse and fine aggregate gradation limitation, ingredient proportion calculation method and formula parameters testing method, which used in skeleton-closed lime-fly-ash sta- bilized aggregates mixture design. The skeleton-closed lime-fly-ash stabilized aggregate which contain 4% lime, 12% fly ash and 84% aggregate was designed, then the samples were made to compare its mechanical property and shrinkage coefficient to suspending-closed lime-fly-ash stabilized aggregates with the same content ratio. The results show that the 7 d, 28 d and 90 d unconfined compressive strength of suspend-closed lime-fly-ash stabilized aggregate is 0.92, 2.73 and 5.45 MPa respectively, temperature shrinkage coefficient is 9.20×10-6/℃, and dry shrinkage coefficient is 66.1×10-6. Comparatively speaking, 7 d, 28 d and 90 d unconfined compressive strength of skeleton-closed one increases to 1.08, 3.70 and 7.85 MPa respectively, and temperature shrinkage coefficient and dry shrinkage coefficient decrease to 8.76×10-6/℃ and 54.7×10-6 separately. 7 tabs, 12 refs.

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Last Update: 2010-10-20