Influence of process parameters on the interlayer bond strength of concrete elements additive manufactured by Shotcrete 3D Printing (SC3DP)

被引：132

作者：

Kloft, Harald ^{[1
]}

Krauss, Hans-Werner ^{[2
]}

Hack, Norman ^{[1
]}

Herrmann, Eric ^{[1
]}

Neudecker, Stefan ^{[3
]}

Varady, Patrick A. ^{[2
]}

Lowke, Dirk ^{[2
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Struct Design ITE, Pockelsstr 4, D-38106 Braunschweig, Germany

[2] Tech Univ Carolo Wilhelmina Braunschweig, Inst Bldg Mat Concrete Construct & Fire Safety iB, Beethovenstr 52, D-38106 Braunschweig, Germany

[3] Folkwang Univ Arts Essen, Design Technol, Martin Kremmer Str 21, D-45327 Essen, Germany

来源：

CEMENT AND CONCRETE RESEARCH | 2020年 / 134卷

关键词：

Shotcrete 3D Printing; SC3DP; Additive Manufacturing; Cold joints; Interlayer bond strength; HARDENED PROPERTIES; EXTRUSION; PERFORMANCE; TECHNOLOGY; THIXOTROPY; ADHESION; FRESH; SCC;

D O I：

10.1016/j.cemconres.2020.106078

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Shotcrete 3D Printing (SC3DP) is a novel robot-guided AM technology developed at Technische Universitat Braunschweig in the environment of the Digital Building Fabrication Laboratory (DBFL). For successful automation, it is crucial to understand and redefine the entire concrete spraying process with all its interdependent parameters. This paper presents the basic principles of the SC3DP technology together with the results of a comparative study on the influence of the two concrete printing techniques extrusion and SC3DP on the interlayer bond strength. In particular, the effect of different time intervals between the deposition of two adjacent layers regarding mechanical properties (bond strength) is investigated. As will be shown, the SC3DP method allows convenient mechanical properties although the printed samples exhibit distinct anisotropies. The reasons are discussed based on investigations of the air void distribution by micro CT and mechanical test results.

引用

页数：9

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