Effects of Diatomite–Limestone Powder Ratio on Mechanical and Anti-Deformation Properties of Sustainable Sand Asphalt Composite

Diatomite has gained more and more interest as a new resource, since it has potential as a favorable alternative to mineral filler in the construction of asphalt pavement compared with ordinary limestone powder. In this paper, the mechanical and anti-deformation properties of sand asphalt composites...

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Bibliographic Details
Published inSustainability Vol. 10; no. 3; p. 808
Main Authors Cheng, Yongchun, Zhu, Chunfeng, Tao, Jinglin, Jiao, Yubo, Yu, Di, Xiao, Bo
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 14.03.2018
Subjects
Asphalt
Asphalt pavements
Composite materials
Compression
Compression tests
Compressive strength
Crack propagation
Creep tests
Deformation
Deformation effects
Deformation resistance
Diatomaceous earth
Lattice design
Limestone
Low temperature
Pavement construction
Powder
Sand
Sustainability
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Summary:Diatomite has gained more and more interest as a new resource, since it has potential as a favorable alternative to mineral filler in the construction of asphalt pavement compared with ordinary limestone powder. In this paper, the mechanical and anti-deformation properties of sand asphalt composites with various proportions of diatomite were investigated by a uniaxial compression failure test, a uniaxial compression repeated creep test, and a low-temperature splitting test in order to determine the optimal replacement content of ordinary limestone powder. Five groups of sand asphalts with various volume ratios of diatomite to limestone (0:1, 0.25:0.75, 0.5:0.5, 0.75:0.25, and 1:0) were determined by the simplex-lattice mixture design (SLD) method. The results reveal that the compression strength, anti-deformation properties, and low-temperature crack resistance of sand asphalts are improved through the use of diatomite. Furthermore, the optimal ratio (0.327:0.673) of limestone to diatomite is determined by the SLD method, according to secant modulus and creep strain results.
ISSN:2071-1050
2071-1050
DOI:10.3390/su10030808