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期刊论文 2

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2015 1

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Effects of time-varying liquid bridge forces on rheological properties, and resulting extrudability and constructability

《结构与土木工程前沿(英文)》   页码 1295-1309 doi: 10.1007/s11709-023-0999-1

摘要: Extrudability and constructability are two important, yet contradictory issues pertaining to the construction of three-dimensional (3D) printing concrete. Extrudability is easily achieved when 3D printing cement mortar has a high water content and low cohesion, but the printed structure is easily collapsible. However, a 3D printing cement mortar with a low water content and high cohesion has a relatively stable printed structure although the cement mortar might not be extrudable. This study proposes a particle-based method to simulate 3D printing mortar extrusion and construction as an overall planning tool for building design. First, a discrete element model with time-varying liquid bridge forces is developed to investigate the microscopic effects of these forces on global rheological properties. Next, a series of numerical simulations relevant to 3D printable mortar extrudability and constructability are carried out. The study demonstrates that the effects of time-varying liquid bridge forces on rheological properties and the resulting extrudability and constructability of 3D printing mortar are considerable. Furthermore, an optimized region that satisfies both the extrusion and construction requirements is provided for 3D printing industry as a reference.

关键词: particle-based simulation     liquid bridge force     rheological property     3D printing mortar     extrudability     constructability    

The Research Review of the Impact of Design to Construction Safety

Lin Yang,Qi-ming Li

《工程管理前沿(英文)》 2015年 第2卷 第3期   页码 224-227 doi: 10.15302/J-FEM-2015044

摘要: The constructability of design impacts the project construction process. Early researches categorized the constructability problems into two types, the construction-technique-associated and the project-target-associated. And furthermore, this paper proposes a new kind of constructability problem which associated with construction safety. Finally, it makes suggestions for research of the safety associated constructability.

关键词: constructability     construction safety     prevention thought design    

标题 作者 时间 类型 操作

Effects of time-varying liquid bridge forces on rheological properties, and resulting extrudability and constructability

期刊论文

The Research Review of the Impact of Design to Construction Safety

Lin Yang,Qi-ming Li

期刊论文