Effect of sulphoaluminate cement on fresh and hardened properties of 3D printing foamed concrete

Rapid setting and low viscosity of sulphoaluminate cement (SAC) make it difficult to be extruded by 3D printing (3DP) technique. In this study, the effect of tartaric acid (TA) on printability, rheology and mechanical property of 3DP SAC paste is investigated. The experimental results indicate that the setting time, hydration evolution and apparent viscosity of SAC paste can be well controlled by adding a proper amount of TA to satisfy the requirements of 3DP. An excellent structure of SAC paste with the ultimate deformation rate less than 10% can be printed without compromising mechanical strength.

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Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Sustainability ◽

10.3390/su12145628 ◽

2020 ◽

Vol 12 (14) ◽

pp. 5628

Author(s):

Zhanzhao Li ◽

Maryam Hojati ◽

Zhengyu Wu ◽

Jonathon Piasente ◽

Negar Ashrafi ◽

...

Keyword(s):

3D Printing ◽

Experimental Testing ◽

Design Procedure ◽

Cementitious Materials ◽

Material Point ◽

Point Of View ◽

Open Time ◽

Potential Benefits ◽

3D Printed ◽

Hardened Properties

3D-printing of cementitious materials is an innovative construction approach with which building elements can be constructed without the use of formwork. Despite potential benefits in the construction industry, it introduces various engineering challenges from the material point of view. This paper reviews the properties of extrusion-based 3D-printed cementitious materials in both fresh and hardened states. Four main properties of fresh-state printing materials are addressed: flowability, extrudability, buildability, and open time, along with hardened properties, including density, compressive strength, flexural strength, tensile bond strength, shrinkage, and cracking. Experimental testing and effective factors of each property are covered, and a mix design procedure is proposed. The main objective of this paper is to provide an overview of the recent development in 3D-printing of cementitious materials and to identify the research gaps that need further investigation.

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Fiber-reinforced lightweight foamed concrete panels suitable for 3D printing applications

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/615/1/012018 ◽

2019 ◽

Vol 615 ◽

pp. 012018

Author(s):

D Falliano ◽

A Sciarrone ◽

D De Domenico ◽

N Maugeri ◽

P Longo ◽

...

Keyword(s):

3D Printing ◽

Fiber Reinforced ◽

Concrete Panels ◽

Foamed Concrete

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Effect of different grade levels of calcined clays on fresh and hardened properties of ternary-blended cementitious materials for 3D printing

Cement and Concrete Composites ◽

10.1016/j.cemconcomp.2020.103708 ◽

2020 ◽

Vol 114 ◽

pp. 103708 ◽

Cited By ~ 2

Author(s):

Yu Chen ◽

Claudia Romero Rodriguez ◽

Zhenming Li ◽

Boyu Chen ◽

Oğuzhan Çopuroğlu ◽

...

Keyword(s):

3D Printing ◽

Cementitious Materials ◽

Grade Levels ◽

Hardened Properties

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A Feasibility Study on HPMC-Improved Sulphoaluminate Cement for 3D Printing

Materials ◽

10.3390/ma11122415 ◽

2018 ◽

Vol 11 (12) ◽

pp. 2415 ◽

Cited By ~ 8

Author(s):

Zhu Ding ◽

Xiaodong Wang ◽

Jay Sanjayan ◽

Patrick Zou ◽

Zhi-Kun Ding

Keyword(s):

Compressive Strength ◽

3D Printing ◽

Feasibility Study ◽

Setting Time ◽

Hydroxypropyl Methylcellulose ◽

Hydration Heat ◽

Heat Setting ◽

Sulphoaluminate Cement ◽

Final Setting Time ◽

Experimental Parameters

A novel 3D printing material based on hydroxypropyl methylcellulose (HPMC)—improved sulphoaluminate cement (SAC) for rapid 3D construction printing application is reported. The hydration heat, setting time, fluidity of paste and mortar, shape retainability, and compressive strength of extruded SAC mortar were investigated. HPMC dosage, water-to-cement (W/C) ratio, and sand-to-cement (S/C) ratio were studied as the experimental parameters. Hydration heat results reveal HPMC could delay the hydration of SAC. The initial and final setting time measured using Vicat needle would be shortened in the case of W/C ratio of 0.3 and 0.35 with HPMC dosage from 0.5% to 1.5%, W/C ratio of 0.40 with HPMC dosage of 0.5%, 0.75%, and 1.5%, and W/C ratio of 0.45 with HPMC dosage of 0.45, or be extended in the case of W/C ratio of 0.4 with HPMC dosage of 1.0% and W/C ratio of 0.45 with HPMC dosage from 0.75% to 1.5%. Fluidity measurement shows HPMC significantly improves the shape retainability. Furthermore, the addition of HPMC remarkably increased the compressive strength of extruded mortar. The results showed that HPMC could be used to prepare 3D printing SAC having satisfactory shape retainability, setting time and compressive strength.

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Properties of foamed concrete reinforced with hybrid fibres

MATEC Web of Conferences ◽

10.1051/matecconf/201816202012 ◽

2018 ◽

Vol 162 ◽

pp. 02012 ◽

Cited By ~ 2

Author(s):

Waleed Abbas ◽

Eethar Dawood ◽

Yahya Mohammad

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Splitting Tensile Strength ◽

The Other ◽

Carbon Fibres ◽

Volumetric Fraction ◽

Polypropylene Fibres ◽

Concrete Mix ◽

Foamed Concrete ◽

Hardened Properties

The properties of foamed concrete reinforced with carbon fibres and hybrid fibres of carbon with polypropylene fibres has been studied. Various volumetric fractions of carbon fibres (0.5, 1 and 1.5%), hybrid fibres of carbon fibres (CF) with polypropylene fibres (PPF) as (1% CF + 0.5% PPF) & (0.5% CF + 1% PPF), also the mono polypropylene fibres as 1.5% PPF were used to reinforce foamed concrete mix. Fresh and hardened properties of all mixes included flowability, density, absorption, compressive strength, splitting tensile strength, and flexural strengths has been tested. Results showed that inclusion of carbon fibres up to 1% volumetric fraction may increase the compressive strength by about 36% higher than that of control mix. Whereas, the use of 1.5% carbon fibres exhibit significant increase in splitting and flexural tensile strengths by about 47 and 114%, respectively, compared to the reference mix. On the other hand, the hybridization of 1% CF + 0.5% PPF increased the splitting tensile strength and flexural strengths by 53% and 114%, respectively, compared with plain foamed concrete mix.

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