Performance Improved of a Lime and Hemp-Based Concrete through the Addition of Metakaolin  

作　　者：Suzanne Daher Amar Benazzouk Haïkel Ben Hamed Thierry Langlet 

机构地区：[1]Universitéde Picardie Jules Verne Avenue des Facultés,Amiens,80025,France

出　　处：《Fluid Dynamics & Materials Processing》2023年第5期1091-1113,共23页流体力学与材料加工（英文）

摘　　要：This work describes in detail the experimental investigation of the physico-mechanical properties of nonstructural hemp concrete(usually used as insulating wall material)when the Air-lime based Tradial PF70 binder is partially replaced using Metakaolin.The objective is to reduce the amount of free Ca2+ions in the binder as these are responsible for the degradation of vegetables particles and can therefore induce a loss of mechanical performances.In order to assess the effectiveness of pozzolanic reaction,amounts of 0%,10%,and 20%vol.of Air-lime binder were replaced by the Metakaolin material,while testing the mechanical properties of concrete specimens containing 200%and 300%of hemp particles.Through SEM and EDX analysis,a tight relationship has been found to exist between the Metakaolin content and physical-mechanical properties of specimen.The pozzolanic reaction consumes calcium hydroxide from binder to produce Hydrated Calcium Silicates(C-S-H)and in turn,this leads to a decrease in the pH-value of the pore solution which is the main factor responsible for hemp particle degradation.

关 键 词：Agro-sourced materials hemp particles tradical PF70 binder METAKAOLIN pozzolanic products mechanical properties DEFORMABILITY particle mineralisation SEM and EDX analyses 

分 类 号：TU528[建筑科学—建筑技术科学]