Strength Development Characteristics of SBR-Modified Cementitious Mixtures for 3-Demensional Concrete Printing

Kim, Kwan Kyu; Yeon, Jaeheum; Lee, Hee Jun; Yeon, Kyu-Seok

doi:10.3390/su11154164

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…With the increase in SBR quantity, the flexural strength increases gradually due to the better bond of the interfacial transition zone (ITZ) and aggregate in the presence of SBR. Moreover, SBR can effectively be used in 3D printing concrete using a higher SBR/cement ratio to obtain desired properties [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Improvement in Durability and Mechanical Performance of Concrete Exposed to Aggressive Environments by Using Polymer

et al. 2022

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Concrete is the most widely used construction material. However, it cannot sustain the harsh environment and can easily deteriorate. It results in repair and reworks that amount to a considerable loss of money and time. The life span of concrete reduces if exposed to external attacks, for instance, sulfate attacks, alkali-silica reactions, corrosion, and drying shrinkage. These ubiquitous attacks cause a reduction in service life and raise the need for early repair and maintenance, resulting in higher life cycle costs and structural failures. To resolve these issues, the potential of styrene-butadiene-rubber (SBR) ultrafine powder as cement replacement polymeric admixture at 0%, 3%, 5%, 7%, and 10% have been evaluated. The effect of SBR-powder on concrete is investigated by conducting an alkali-silica reactivity test (ASR), rapid-chloride-permeability test (RCPT), drying shrinkage, and sulfate resistivity tests. Workability, compressive and flexural strength tests are also conducted. For ASR and drying shrinkage, mortar bar samples were cast, exposed to respective environments, and the percentage change in length was measured. For mechanical tests and RCPT, prisms, cylinders and cubes were cast and tested at 28 days. The SBR-powder modification reduces concrete’s permeability, drying shrinkage, and expansions due to ASR and sulfate attacks. SBR powder increased workability by 90%, compressive strength by 23%, and flexural strength by 9.4% in concrete when used at 10% cement replacement by weight. The SBR-powder (10%) modification reduced the RCPT value by up to one-third (67%), drying shrinkage by 53%, ASR by 57%, and sulfate reaction by 73%. Consequently, SBR powder usage can adequately improve the workability, mechanical properties, and durability of the concrete and lead to advanced sustainable concrete with low repair requirements.

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Section: Introductionmentioning

confidence: 99%

Improvement in Durability and Mechanical Performance of Concrete Exposed to Aggressive Environments by Using Polymer

et al. 2022

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“…26 The polymer is used in the concrete in two forms: (a) coating the aggregates with pre-mixed polymeric liquid, and (b) combining the polymeric particles with liquid or powder refillable into a fresh cement mixture. 27,28 In the coating system before mixing, the aggregates are soaked in polymeric fluid and then dried in the environment for 24-48 h. In this method, the number of coated layers can be more than one. In the second system, the cement particles begin to hydrate after mixing with water, while the polymer particles in the latex coagulate to form a thin layer leading to bonding the dehydrated cement phases and aggregates.…”

Section: Introductionmentioning

confidence: 99%

“…This type of concrete also has excellent adhesion to old concrete and is highly durable against destructive solutions, so it is mainly used for industrial floor coatings as well as for the restoration of damaged slabs 26 . The polymer is used in the concrete in two forms: (a) coating the aggregates with pre‐mixed polymeric liquid, and (b) combining the polymeric particles with liquid or powder refillable into a fresh cement mixture 27, 28 …”

Section: Introductionmentioning

confidence: 99%

Effect of pre‐coating lightweight aggregates on the self‐compacting concrete

Vahabi

Tahmouresi

Mosavi

et al. 2021

Structural Concrete

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The porous lightweight aggregates adversely affect fresh properties of concrete, including slump and disruption of pumping concrete. Besides, this type of concrete is very susceptible to shrinkage cracking. In this study, two types of lightweight aggregates were used with a combination of two types of coating, including hydrophobic polymers ‐polyvinyl acetate and styrene‐butadiene rubber coatings. The coatings were applied in single and double layers. For the fresh concrete, the fresh properties of concrete, including slump flow, T50, flow time, and L‐Box were evaluated and for the hardened concrete, compressive strength, flexural strength, tensile strength, water absorption and shrinkage was studied. It was seen that the slump flow of coated lightweight aggregates increased by 10%, and also coating process reduced the water absorption of the aggregates up to 82%. The compressive strength increased by up to 21% for the coated aggregates. Scanning electron microscopy was also used to investigate the microstructure of the mortar‐aggregate interface. Microstructural images showed a uniform and dense interfacial zone of cementitious matrix‐aggregate for coated lightweight aggregates. Moreover, an improvement of 50–150 μm in the interfacial zone's thickness was seen for coated aggregates compared to uncoated aggregates.

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3D printing trends and perspectives

Alves,

Santana

2022

Polymers for 3D Printing

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Strength Development Characteristics of SBR-Modified Cementitious Mixtures for 3-Demensional Concrete Printing

Cited by 6 publications

References 26 publications

Improvement in Durability and Mechanical Performance of Concrete Exposed to Aggressive Environments by Using Polymer

Improvement in Durability and Mechanical Performance of Concrete Exposed to Aggressive Environments by Using Polymer

Effect of pre‐coating lightweight aggregates on the self‐compacting concrete

3D printing trends and perspectives

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