EXPERIMENTAL EVALUATION ON MODULUS OF EQUIVALENT HOMOGENEOUS ETTRINGITE  

作　　者：Minghua Zhang Jiankang Chen Jue Zhu Jiangying Chen 

机构地区：[1]Department of Mechanics and Engineering Science, Ningbo University, Ningbo, 315211, China

出　　处：《Acta Mechanica Solida Sinica》2009年第4期320-327,共8页固体力学学报（英文版）

基　　金：supported by the National Basic Research Program of China(973 Program,2009CB623203);the National Nature Science Foundation of China(Nos.10572064 and 10802039);Natural Science Foundation of Zhejiang Province (No.Y107780);K.C.Wong Magna Fund in Ningbo University.

摘　　要：In the present study, the average modulus of delayed ettringite is evaluated by an experimental method combined with theoretical analysis. Firstly, the delayed ettringite crystal is synthesized by chemical reaction of Aluminum sulfate and calcium hydroxide. Secondly, specimens are obtained by compressing the delayed ettringite crystal under different pre-loads. Thirdly, the variation of the modulus of the specimen with different pre-loads is tested using Instron material test machine and the SHPB technique, respectively. It is found that the experimental data may be suitably fitted by Boltzmann Function. Finally, the porosity of the specimen is detected using the saturation method, and the effect of the porosity on the modulus is analyzed by the Eshelby＇s equivalent inclusion method and the Mori-Tanaka＇s scheme. The static and dynamic modulli of the equivalent homogeneous ettringite obtained in present study are approximately 10.64 GPa and 24.61 GPa, respectively.In the present study, the average modulus of delayed ettringite is evaluated by an experimental method combined with theoretical analysis. Firstly, the delayed ettringite crystal is synthesized by chemical reaction of Aluminum sulfate and calcium hydroxide. Secondly, specimens are obtained by compressing the delayed ettringite crystal under different pre-loads. Thirdly, the variation of the modulus of the specimen with different pre-loads is tested using Instron material test machine and the SHPB technique, respectively. It is found that the experimental data may be suitably fitted by Boltzmann Function. Finally, the porosity of the specimen is detected using the saturation method, and the effect of the porosity on the modulus is analyzed by the Eshelby＇s equivalent inclusion method and the Mori-Tanaka＇s scheme. The static and dynamic modulli of the equivalent homogeneous ettringite obtained in present study are approximately 10.64 GPa and 24.61 GPa, respectively.

关 键 词：ETTRINGITE equivalent homogeneous materials Boltzmann Function MODULUS 

分 类 号：TQ172.1[化学工程—水泥工业] TN702[化学工程—硅酸盐工业]