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Le Ding

Bio: Le Ding is an academic researcher from Changsha University of Science and Technology. The author has contributed to research in topics: Subgrade & Falling weight deflectometer. The author has an hindex of 3, co-authored 7 publications receiving 79 citations.

Papers
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Journal ArticleDOI
TL;DR: Wang et al. as mentioned in this paper analyzed the physical and chemical properties of construction and demolition wastes (CDW) subgrade construction case in Beijing, and a series of tests (compaction degree test, settlement observation, Portable Falling Weight Deflectometer test) were carried out.

123 citations

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TL;DR: Wang et al. as mentioned in this paper presented an experimental investigation on the performance of cement stabilized recycled mixture containing recycled concrete aggregate (RCA) and crushed brick (RCB), which are separated from recycled aggregate.

24 citations

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TL;DR: In this article , a three dimensional (3D) self-bonded porous graphite fiber monolith (SBGFM) with in-plane bonding characteristics is constructed as TC enhancer for phase change materials (PCM) composites.

15 citations

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TL;DR: In this article, the effect of different strengthening methods on recycled coarse aggregate (RCA) reprocessed from construction and demolition (CD the 75% of the mixture meets the requirements of the second-class highways and below).
Abstract: This paper attempts to study the effect of different strengthening methods on recycled coarse aggregate (RCA) reprocessed from construction and demolition (CD the 75% of the mixture meets the requirements of the second-class highways and below.

9 citations

Journal ArticleDOI
TL;DR: Wang et al. as mentioned in this paper carried out researches on properties of recycled asphalt mixture (RAM) by laboratory testing, under different contents of recycled aggregates (RA) and proportions of bricks to concrete.
Abstract: Construction and demolition waste contain large amount of concrete and bricks. To identify its feasibility of applying in asphalt stabilized gravel mixtures as pavement base, this paper carried out researches on properties of recycled asphalt mixture (RAM) by laboratory testing, under different contents of recycled aggregates (RA) and proportions of bricks to concrete. First, the basic physical properties of each component of the RAM were determined. According to the actual screening passing rate, the Bailey method was used to design and verify the grading of RAM, and then initial asphalt content was estimated. The stability, flow value, voidage, and bulk density were obtained by Marshall Test, and the optimal asphalt-aggregate ratios were determined under different RA contents and proportion of bricks to concrete. Subsequently, the uniaxial compression test, splitting tensile test, immersion Marshall test, freeze-thaw splitting test, and Hamburg rutting test were performed to investigate mechanical properties, water stability, and high-temperature stability of RAM. The results shows that as the content of RA increases from 0% to 100%, the corresponding compressive strength, resilient modulus, and splitting tensile strength all decrease; the same change trend is presented in the residual stability and freeze-thaw splitting test strength ratio and rutting depth. According to the requirement of pavement base of high-grade roads in China’s standards, the recommended RA content and proportion of bricks to concrete were proposed for the design RAM.

7 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors present a comprehensive review on the workability and mechanical properties of fiber reinforced recycled aggregate concrete (FRAC) and highlight the most promising and feasible strength enhancement methods for the FRAC mainly using steel fiber, polypropylene fiber (PPF), basalt fiber (BF), and glass fiber (GF).

83 citations

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TL;DR: In this article, a rubber-modified RAC (RRAC) notched beam specimens with three recycled aggregate substitutions (0, 50, and 100%), and four rubber contents (0., 2, 4, and 6) were tested using the three-point bending test.

67 citations

Journal ArticleDOI
Ziming He1, Aiqin Shen1, Hansong Wu1, Wenzhen Wang1, Lusheng Wang1, Chao Yao1, Jinhua Wu1 
TL;DR: In this article, the fresh, mechanical, shrinkage, durability, and microstructural properties of cement-based materials when RBP partially replaces Portland cement are reviewed, based on the existing research, which shows that RBP is rich in SiO2, Al2O3, Fe 2O3 and has pozzolanic activity.

56 citations

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TL;DR: In this paper, a review placed enormous emphasis on collating information from recent studies on biochars from agro-sources used as an admixture in cement-based applications.
Abstract: With increasing population and rising demands for improved built environment, there is an expected increase in greenhouse gas emission from the construction industry. Carbon dioxide emission levels are fast approaching a tipping point which could lead to irreversible climate change. The earth's capability to neutralise the CO2 emissions through the natural carbon cycle has been overstretched. Therefore it is imperative to adopt technologies that are able to capture and sequester CO2 in order to cancel out their release from industrial activities such as the construction and building industry. This is important so that cement-based material productions' carbon footprint can be reduced drastically for a positive change to take place in the climate. Biochar holds great promise as an effective CO2 sorptive material in cement-based applications relatively similar to its conventional use for soil amendment. Actually, fragmented researches on biochar as an admixture in cementitious materials have been conducted. Based on this logic, this review placed enormous emphasis on collating information from recent studies on biochars from agro-sources used as an admixture in cement-based applications. Similarly, the review gave up-to-date knowledge about the sources of the biomass and the production processes. Conclusively, the positive effects of biochar for carbon sequestration on some properties of the various cementitious applications were highlighted.

54 citations

Journal ArticleDOI
TL;DR: In this paper, the variation law of the dynamic resilient modulus of C&D waste under repeated freeze-thaw cycles was revealed and a reasonable performance prediction model was established.

49 citations