In this section, you can access to the latest technical information related to the FUTURE project topic.

Performance enhancement of green high-ductility engineered cementitious composites by nano-silica incorporation

To promote the sustainable development of construction materials, the green high-ductility engineered cementitious composites (GHD-ECC) incorporating 100% recycled fine aggregate (RFA) was developed. The effect of nano-silica (NS) at different dosages (0, 1%, 2%, and 3%) on the microstructural features and the macroscopic strength of GHD-ECC was investigated. The results of a comprehensive experimental study indicate that: (1) the four types of cementitious composites all exhibit multiple cracking characteristics, and the mechanical resistance of GHD-ECC is significantly improved owing to the addition of NS; (2) NS with high pozzolanic reactivity promotes the hydration reaction process, and the additionally formed hydration products fill the micropores and densify the microstructure of GHD-ECC; (3) the increase of both the matrix strength and matrix toughness leads to the enhancement of frictional bonding between fiber and matrix, which induces the transition of the failure mode from fiber pulled-out to fiber rupture and thus causes, to a certain extent, the degradation of the fiber bridging capacity. Based on the comprehensive investigation, the 1% NS dosage is found to be the optimal content, which not only meets the workability requirement but also contributes to the achievement of saturated cracking state and high mechanical resistance.

» Author: Yingwu Zhou, Shuyue Zheng, Xiaoxu Huang, Bin Xi, Zhenyu Huang, Menghuan Guo

» Publication Date: 26/04/2021

» More Information

« Go to Technological Watch



AIMPLAS Instituto Tecnológico del Plástico

C/ Gustave Eiffel, 4
(València Parc Tecnològic) - 46980
PATERNA (Valencia) - SPAIN

PHONE

(+34) 96 136 60 40

EMAIL

Project Management department - Sustainability and Industrial Recovery
life-future-project@aimplas.es