Effect of additional water or superplasticizer on key characteristics of cement paste made with superabsorbent polymer and other shrinkage mitigating materials

Aghaee, Kamran; Sposito, Ricarda; Thienel, Karl‐Christian; Khayat, Kamal H.

doi:10.1016/j.cemconcomp.2022.104893

Cited by 28 publications

(3 citation statements)

References 68 publications

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“…Additionally, the addition of a PBA emulsion can create certain pore structures, resulting in an increase in the internal pore volume of the cement paste, which also affects its compressive and flexural strength. Furthermore, the addition of a PBA emulsion may form a certain network structure within the cement paste, enhancing its compactness and affecting its flexural strength [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Butyl Acrylate Copolymer Emulsion and Its Regulation Effect on Cement Hydration

Mao

Deng

2023

Materials

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Due to its large volume and poor thermal conductivity, mass concrete is prone to temperature cracking caused by heat release during cement hydration after pouring. To address the issue of temperature cracking in mass concrete, this study utilized emulsion polymerization to prepare polybutyl acrylate (PBA) emulsions. At an optimal dosage of 1.5%, the addition of a PBA emulsion reduced the temperature rise of cement paste by 12.4%. The inhibitory mechanism of a PBA emulsion on cement hydration was analyzed by characterization techniques such as isothermal calorimetry, X-ray diffraction Rietveld full-profile fitting method (XRD), thermogravimetric–differential scanning calorimetry (TG-DSC), and mercury intrusion porosimetry (MIP). The results showed that the C3S content in the cement specimens with 1%, 1.5%, and 2% PBA increased by 13.83%, 23.52%, and 34.65% compared to the blank group, respectively, while the C3A content increased by 92.59%, 79.63%, and 96.30%, respectively. The addition of a PBA emulsion can slow down the hydration rate of C3S and C3A, thereby reducing the temperature rise and fall rate of cement hydration, reducing the peak heat release of the hydration reaction, and ultimately achieving the inhibition of the cement hydration reaction. In addition, the mechanical properties of PBA-modified cement-based materials were also tested. The results show that the addition of PBA can affect the early strength development of cement samples, but has no effect on the strength after 60 days. Therefore, PBA can be used as a hydration temperature rise control material to reduce the risk of temperature cracking in mass concrete.

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Section: Resultsmentioning

confidence: 99%

Preparation of Butyl Acrylate Copolymer Emulsion and Its Regulation Effect on Cement Hydration

Mao

Deng

2023

Materials

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“…This may be due to the surface-to-volume ratio of internal curing water. Kamran [23] proposed that coarse SAP acts as a larger reservoir, while fine SAP acts as a smaller reservoir. Regarding moisture loss resulting in total shrinkage, it is observed that a higher loss of moisture can be found in coarse SAP than in fine SAP.…”

Section: Shrinkagementioning

confidence: 99%

Impact of Superabsorbent Polymer on Shrinkage and Compressive Strength of Mortar and Concrete

Arckarapunyathorn,

Markpiban,

Sahamitmongkol

2024

Sustainability

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This article aims to study the effects of mixtures with superabsorbent polymers (SAPs) when using different mixing methods. The mixing methods used in this study are the dry mixing method and wet mixing method. Autogenous shrinkage, total shrinkage, drying shrinkage, compressive strength, and curing sensitivity index values are investigated. The results show that mixtures with SAPs have reduced autogenous shrinkage and total shrinkage. Shrinkage is more effectively reduced by the dry SAP mixing method than the wet SAP mixing method. The compressive strength derived by the dry SAP mixing method is higher than that derived by the wet SAP mixing method.

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“…Ordinary Portland cement (P.O42.5) was used in the experiments; its physical properties are listed in Table 2. In the existing studies [24,25], the content of water reducing agent is all within 2%, and excessive inclusion of water reducing agent in cement slurry will affect the durability of slurry. Cement-based grouting materials are inevitably subjected to a certain degree of consolidation and shrinkage during the setting and hardening processes.…”

Section: Cementmentioning

confidence: 99%

Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar

Wu,

Chen,

Zhang

et al. 2023

Materials

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Increasing the water–cement ratio and water-reducer dosage of cement slurry enhances its fluidity. However, a high water–cement ratio diminishes the beneficial effects of water reducers on fluidity. The stone content of the slurry decreases as the water-reducer dosage increases. Additionally, the water–cement ratio significantly affects stone content. However, when the water–cement ratio exceeds a threshold value, stone content decreases. Furthermore, the threshold value of the water–cement ratio decreases with increasing water-reducer dosage. Without the addition of the water reducer, as the water–cement ratio increases the overall integrity of the grout stone decreases. The addition of the water reducer alters the surface pore distribution, wherein “uniform small pores” change to “localized large pores.” Based on the multi-objective optimization of Matlab, the recommended optimal mix composition for a slow-setting cement slurry is a water–cement ratio of 0.25 and water-reducer dosage of 1.5%. With the use of this optimized mix composition, the stone content and compressive strength increase by 7.8% and 145.6%, respectively, compared to those obtained using the recommended mix ratio in the specifications. Additionally, all relevant performance parameters meet the requirements specified by previous standards.

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Effect of additional water or superplasticizer on key characteristics of cement paste made with superabsorbent polymer and other shrinkage mitigating materials

Cited by 28 publications

References 68 publications

Preparation of Butyl Acrylate Copolymer Emulsion and Its Regulation Effect on Cement Hydration

Preparation of Butyl Acrylate Copolymer Emulsion and Its Regulation Effect on Cement Hydration

Impact of Superabsorbent Polymer on Shrinkage and Compressive Strength of Mortar and Concrete

Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar

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