Investigation into Creep Characteristics and Model of Recycled Construction and Demolition Waste Used in Embankment Filler

Zhe Li, Shihao Yan, Lulu Liu and Jia Yang
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Zhe Li: Key Laboratory of Special Area Highway Engineering, Ministry of Education, Chang'an University, Xi’an 710064, China
Shihao Yan: Key Laboratory of Special Area Highway Engineering, Ministry of Education, Chang'an University, Xi’an 710064, China
Lulu Liu: Key Laboratory of Special Area Highway Engineering, Ministry of Education, Chang'an University, Xi’an 710064, China
Jia Yang: Key Laboratory of Special Area Highway Engineering, Ministry of Education, Chang'an University, Xi’an 710064, China

Sustainability, 2020, vol. 12, issue 5, 1-22

Abstract: The creep deformation of recycled construction and demolition waste (CDW) filler is an important factor affecting road performance. In this paper, a series of laboratory tests, including a compaction test, sieving test, California bearing ratio (CBR) test, creep test and unloading test are conducted on CDW filler. The engineering properties of different ratios of CDW mixture are systematically analyzed, the CBR value of CDW filler meets the requirements of an embankment. The creep type of CDW filler under a test load is stable creep, the results of the creep characteristics are analyzed from a microscopic point of view. The filler with a 7:2:1 ratio (brick slag: concrete: mortar) has the densest structure, which is dense and less porous, and the deformation is the smallest. Reasonable proportion control is the key to reducing embankment deformation. The improved Burgers model, which can better describe the creep characteristics of CDW filler, and the effects of load and ratio on the creep parameters are analyzed using the equivalent creep compliance. This study is of great significance for the promotion of CDW and meets the requirements of sustainable development.

Keywords: construction demolition waste; creep deformation; model; saturated condition (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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