Influence of Hydroxypropyl Methylcellulose Dosage on the Mechanical Properties of 3D Printable Mortars with and without Fiber Reinforcement
Hydroxypropyl Methylcellulose (HPMC) is one of the most frequently used viscosity modifying admixtures in 3D printable cement-based materials. In this study, the effects of HPMC dosage on the mechanical properties of 3D printable cement-based mortars were investigated. For this purpose, mortar mixtu...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-03-01
|
| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/12/3/360 |
| _version_ | 1797472520611299328 |
|---|---|
| author | Çağlar Yalçınkaya |
| author_facet | Çağlar Yalçınkaya |
| author_sort | Çağlar Yalçınkaya |
| collection | DOAJ |
| description | Hydroxypropyl Methylcellulose (HPMC) is one of the most frequently used viscosity modifying admixtures in 3D printable cement-based materials. In this study, the effects of HPMC dosage on the mechanical properties of 3D printable cement-based mortars were investigated. For this purpose, mortar mixtures with and without micro steel fibers containing three different HPMC dosages (0%, 0.15%, and 0.30% by weight of cement) were produced. Reliant on the HPMC dosage, heat flow and cumulative heat curves were obtained. At the end of 7 and 28 days of standard curing, flexural, compressive, and shear bond strengths, as well as flexural toughness, were measured. Additionally, porosity values were obtained on molded, single-layer, and three-layer printed specimens. The results showed that the increase in HPMC dosage prolonged the setting times and decreased the heat release. Moreover, the porosity values increased with an increase in the HPMC dosage and the number of printed layers. All mechanical properties were drastically decreased with the use of HPMC. The decrements were more significant at the first 0.15% HPMC dosage and the shear bond strengths. Prolonging the curing period from 7 to 28 days did not lead to meaningful recovery in the mechanical properties. The negative effects of HPMC on flexural and shear bond performances were more pronounced in fiber-reinforced mortars. |
| first_indexed | 2024-03-09T20:02:54Z |
| format | Article |
| id | doaj.art-6e2b345bbc0d493ea36072d91b7bbab4 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T20:02:54Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-6e2b345bbc0d493ea36072d91b7bbab42023-11-24T00:39:28ZengMDPI AGBuildings2075-53092022-03-0112336010.3390/buildings12030360Influence of Hydroxypropyl Methylcellulose Dosage on the Mechanical Properties of 3D Printable Mortars with and without Fiber ReinforcementÇağlar Yalçınkaya0Department of Civil Engineering, Faculty of Engineering, Dokuz Eylül University, İzmir 35160, TurkeyHydroxypropyl Methylcellulose (HPMC) is one of the most frequently used viscosity modifying admixtures in 3D printable cement-based materials. In this study, the effects of HPMC dosage on the mechanical properties of 3D printable cement-based mortars were investigated. For this purpose, mortar mixtures with and without micro steel fibers containing three different HPMC dosages (0%, 0.15%, and 0.30% by weight of cement) were produced. Reliant on the HPMC dosage, heat flow and cumulative heat curves were obtained. At the end of 7 and 28 days of standard curing, flexural, compressive, and shear bond strengths, as well as flexural toughness, were measured. Additionally, porosity values were obtained on molded, single-layer, and three-layer printed specimens. The results showed that the increase in HPMC dosage prolonged the setting times and decreased the heat release. Moreover, the porosity values increased with an increase in the HPMC dosage and the number of printed layers. All mechanical properties were drastically decreased with the use of HPMC. The decrements were more significant at the first 0.15% HPMC dosage and the shear bond strengths. Prolonging the curing period from 7 to 28 days did not lead to meaningful recovery in the mechanical properties. The negative effects of HPMC on flexural and shear bond performances were more pronounced in fiber-reinforced mortars.https://www.mdpi.com/2075-5309/12/3/3603DCPHPMCfiber reinforcementmechanical propertiesporosity |
| spellingShingle | Çağlar Yalçınkaya Influence of Hydroxypropyl Methylcellulose Dosage on the Mechanical Properties of 3D Printable Mortars with and without Fiber Reinforcement Buildings 3DCP HPMC fiber reinforcement mechanical properties porosity |
| title | Influence of Hydroxypropyl Methylcellulose Dosage on the Mechanical Properties of 3D Printable Mortars with and without Fiber Reinforcement |
| title_full | Influence of Hydroxypropyl Methylcellulose Dosage on the Mechanical Properties of 3D Printable Mortars with and without Fiber Reinforcement |
| title_fullStr | Influence of Hydroxypropyl Methylcellulose Dosage on the Mechanical Properties of 3D Printable Mortars with and without Fiber Reinforcement |
| title_full_unstemmed | Influence of Hydroxypropyl Methylcellulose Dosage on the Mechanical Properties of 3D Printable Mortars with and without Fiber Reinforcement |
| title_short | Influence of Hydroxypropyl Methylcellulose Dosage on the Mechanical Properties of 3D Printable Mortars with and without Fiber Reinforcement |
| title_sort | influence of hydroxypropyl methylcellulose dosage on the mechanical properties of 3d printable mortars with and without fiber reinforcement |
| topic | 3DCP HPMC fiber reinforcement mechanical properties porosity |
| url | https://www.mdpi.com/2075-5309/12/3/360 |
| work_keys_str_mv | AT caglaryalcınkaya influenceofhydroxypropylmethylcellulosedosageonthemechanicalpropertiesof3dprintablemortarswithandwithoutfiberreinforcement |