Bonding strength of steel rebars perpendicular to the hardened 3D-printed concrete layers

被引：13
作者：
Aramburu, A. [1 ,2 ]
Calderon-Uriszar-Aldaca, I. [1 ,3 ]
Puente, I. [2 ]
机构：
[1] TECNALIA, Basque Res & Technol Alliance BRTA, Mikeletegi Pasealekua 2, Donostia San Sebastia 20009, Spain
[2] Tecnun, Sch Engn, Manuel Lardizabal Ibilbidea 13, Donostia San Sebastian 20018, Gipuzkoa, Spain
[3] Univ Publ Navarra, Dept Engn, Pamplona, Spain
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2022年 / 340卷
关键词：
3D concrete printing; Additive manufacturing; Bonding strength; Pull-out test; Reinforcement; REINFORCEMENT;
D O I：
10.1016/j.conbuildmat.2022.127827
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Passive rebars are inserted into interior hollow channels within a 3D-printed mortar geometry and then bonded with a wet joint of filling mortar, in order to test the bonding strength of the rebars within the mortar structure. Standardized test procedures are adapted for the test procedure. The test results revealed bonding strengths with shear stresses within an interval between 16.75 MPa and 18 MPa, dependent upon rebar diameter, and good early strength development of the bonding mortar of at least 14 MPa during the first week. No specimen failed because of debonding between the filling mortar and the 3D-printed cylinder, nor because of debonding of the cylinder and the concrete poured around its exterior.
引用
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页数：10
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