关键词: 3D打印混凝土;可塑造性;评价方法;承载力;变形;失稳

Abstract: The evaluation of the molding performance of 3 D printing concrete is studied , including forming time , bearing capacity , deformation and instability control .The forming time is the basis to determine the hardening characteristics of print specimens , the method of testing and evaluating the shaping time ratio of 3 D concrete is studied .The experimental method for evaluating the bearing capacity of concrete is given by the means to obtain the parameters of the unified rheological model experiment method .Then, the deformation control of the printing concrete material in the research of the molding performance is analyzed , and two evaluation methods of the deformation control are put forward , and as well as control index of instability failure is given .Finally, through the control of the printing stroke time and the hardening strength of concrete material , the method of calculating the bearing characteristic value and the rising height of the printing concrete structure are deduced .

Key words: 3D printing concrete;shaping performance;evaluation method;bearing capacity;deformation;instability