Research progress in applications of recycled plastic aggregates in cement concrete

doi:10.19491/j.issn.1001-9278.2025.06.016

Abstract

Abstract:

This paper reviewed recent advances in the application of recycled plastic aggregates in cement concrete， and also examined the types of plastic aggregates and their effects on the key properties of cement concrete， analyzing their underlying mechanisms of action， with a focus on three critical aspects： physical properties， mechanical performance， and durability. Additionally， the cost⁃effectiveness， environmental implications， and current limitations of incorporating plastic aggregates into cement⁃based materials were discussed. These insights provide a foundational understanding of the practical advantages and challenges of using recycled plastics in concrete， offering guidance for future research and sustainable construction practices.

Key words: plastic aggregates, cement concrete, physical property, mechanical property, durability, economic and environmental benefits

CLC Number:

TQ322

MA Hailong, DAI Mingxin. Research progress in applications of recycled plastic aggregates in cement concrete[J]. China Plastics, 2025, 39(6): 89-99.

Figures/Tables 6

Fig.1. Common plastic aggregates

材料	拉伸强度/MPa	弹性模量/GPa	导热系数/W·（m·K）^-1
PET	55~80	2.1~3.1	0.15
PVC	50~60	2.7~3.0	0.17~0.21
PS	30~55	3.1~3.3	0.105
PP	25~40	1.3~1.8	0.12
PE	18~30	0.6~1.4	0.33~0.52
石灰岩	-	70	2.29~2.78
砂子	-	70	4.45
水泥	-	36~40	1.00

Tab.1. Material properties of common plastics and concrete

Fig.2. Interfacial transition zone between plastic aggregate and cement matrix

Fig.3. Fracture section of cement concrete containing plastic aggregate in splitting test

Fig.4. Influence of plastic aggregate substitution rate on dry shrinkage of concrete

Fig.5. Influence of plastic aggregate content and size on wear resistance of cement concrete

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