Materials Science

沥青抗裂性

Asphalt Cracking Resistance

The ability of asphalt mixtures and binders to withstand tensile stresses and resist crack initiation and propagation under environmental aging. / 沥青混合料和结合料在环境老化下承受拉伸应力并抵抗裂纹产生与扩展的能力。

Knowledge type: 自然理论
First proposed or discovered
Proposer: Turkey Farm member
Creator: 农场主
Last updated: 2026-11-05 19:05:40

Sub-knowledge points

Effect of oxidative aging on cracking performance.Correlation between binder and mixture cracking resistance.Chemical composition variations due to crude source and refining processes.

Higher-order knowledge points

Asphalt pavement durability and maintenance.Long-term performance of transportation infrastructure.

Main parameters and performance indicators

Cracking Tolerance (CT) index: A measure of cracking resistance.Gaestel index (GI): Indicates sol-to-gel transformation.Softening-point change (Δ SP): Differentiates binder stability groups.Ductility change (Δ ductility): Quantifies tensile extensibility reduction.Critical tip opening displacement (CTOD): Measured in Double-edge-notched tension tests.

Open problems

Traditional binder grading is insufficient for unmodified binders.Ensuring reliable long-term cracking performance requires chemical and fracture-based criteria.

Related literature

ranked by community stars

Evaluating Cracking Resistance of Asphalt Binders and Mixtures under Extended Aging through Chemical, Physical, and Fracture-Based CorrelationsOpen source

沥青抗裂性

Sub-knowledge points

Higher-order knowledge points

Main parameters and performance indicators

Open problems

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