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A novel biomimetic design of a 3D vascular structure for self-healing in cementitious materials using Murrays law
طراحی biomimetic جدید از ساختار عروقی سه بعدی برای بهبودی در مواد سیمانی با استفاده از قانون موری-2020 Nature has always been a source of inspiration in engineering applications and vascular networks, as in human
skin and in a tree leaf, are one attribute that has received attention in the design of resilient structures. A vascular
system houses healing agents within its hollow channels or interconnected networks which are incorporated
within a cement matrix. It is the only self-healing approach that has the capability to address different scales
of damage in cementitious materials. The main aim of this work is to develop a novel vascular network inspired
by nature for self-healing in cementitious systems. To achieve this, a biomimetic three-dimensional (3D) vascular
networkwas designed and generated followingMurrays lawfor circulatory blood volume transfer. The designed
structureswere constructed through 3D printing and assessed in a cement-based matrix. One-dimensional (1D)
and two-dimensional (2D) models were also designed, printed and embedded into cement prisms to compare
with the 3Dvascular system. Load recoverywas used to assess recovery inmechanical properties after the sample
was cracked and pumped with sodium silicate for 28 days. Mechanical testing assessed the compatibility of the
system with the surrounding matrix as well as the functionality of the network in delivering and releasing the
healing agent at the location of damage. This initial proof of conceptwork confirmed the ability of all vascular systems
to deliver the healing agent after a damage event, and the 3D vascular system demonstrated a significantly
enhanced healing performance. Keywords: Vascular networks | Biomimetic structures | 3D printing | Self-healing | Cementitious materials |
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