Thixotropic structural build-up of cement-based materials: A state-of-the-art review

Thixotropic structural build-up is an intrinsic property of fresh cementitious materials, playing a significant role in pumpability, stability and formwork filling concrete, as well buildability 3D printing. This paper presents critical review on the thixotropic cement-based materials from viewpoints origins, evaluation methods, influencing factors applications. Recent research indicates that origin combining result colloidal interactions chemical hydration, with three stages network percolation, rigid percolation rigidification. The evolution static yield stress storage modulus can be used to evaluate each describing different aspects. Increasing particle volume fraction, decreasing surface coverage reducing maximum packing fraction exhibit positive effect increase build-up. Based relationships performance parameters, predict casting, numerical simulations concrete Furthermore, on-demand stiffening obtained by magneto-controlled containing magnetizable particles.