Effect of fiber reinforcement on extrudability and buildability of mineral additive modified Portland cement mortars: A rheometer based simulation analysis

被引：8

作者：

Saruhan V. ^{[1
]}

Keskinateş M. ^{[2
,3
]}

Felekoğlu K.T. ^{[4
]}

Felekoğlu B. ^{[4
]}

机构：

[1] Dokuz Eylül University, The Graduate School of Natural and Applied Science, Constr. Materials Program, Buca, Izmir

[2] Dokuz Eylül University, Institute of Natural and Applied Sciences, Buca, İzmir

[3] Karamanoğlu Mehmetbey University, Engineering Faculty, Department of Civil Engineering, Karaman

[4] Dokuz Eylül University, Engineering Faculty, Department of Civil Engineering, Buca, İzmir

来源：

Journal of Building Engineering | 2022年 / 54卷

关键词：

Extrudability/buildability; Mortar extruder; Rheometer; Shear stress/viscosity;

D O I：

10.1016/j.jobe.2022.104636

中图分类号：

学科分类号：

摘要：

This study aims to analyze the role of fiber reinforcement on the extrudability/buildability of mortars with an alternative rheometer-based simulation method. Mortars reinforced with an innovative high tenacity polymeric fiber and w/o fiber are prepared. The subjected shear rate history of mortars throughout the extrusion pipe is simulated with aid of a rheometer equipped by a dragging ball. Shear rate dependent variation of shear stress and viscosity values as a function of time have been measured. These parameters are associated with the expected shear rates at longitudinal axis of extrusion pipe. Critical points where cross section changes at longitudinal direction are determined and effect of shear rate variation on rheological parameters is discussed. Extrudability and buildability coefficients are proposed based on shear stress and viscosity values at these critical points throughout the extrusion pipe. Test results revealed that fiber reinforcement has a paramount effect on rheological parameters of mortars where proposed simulation method is capable of precisely detect the buildability of fiber-reinforced mortars. © 2022 Elsevier Ltd

引用

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