Development and application of microcapsule for cement hydration control

Choi, Young Cheol; Cho, Young Keun; Shin, Kyung-Jun; Kwon, Seung-Jun

doi:10.1007/s12205-015-0281-8

Cited by 14 publications

(2 citation statements)

References 10 publications

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“…The observed decrease in the median pore diameters is a consequence of lower W/B ratios used to achieve similar consistency. Also, it can be related to subsequent filling of larger pores by the hydration products particularly, C-S-H gel [58,59,60]. This can explain why the addition of cement led to predominance of smaller pore sizes in lime mortar.…”

Section: Microstructural Featuresmentioning

confidence: 99%

Impact of Changing Microstructural Compositions of Lime Based Mortar on Flexibility: Case Study of Sustainable Lime-Cement Composites

Olaniyan¹

2020

Adv. sci. technol. eng. syst. j.

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Section: Microstructural Featuresmentioning

confidence: 99%

Impact of Changing Microstructural Compositions of Lime Based Mortar on Flexibility: Case Study of Sustainable Lime-Cement Composites

Olaniyan¹

2020

Adv. sci. technol. eng. syst. j.

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“…5 (a) and (b)). This can be attributed to lower W/B ratio due to reduction in lime content in the composite, faster hydration associated with cement and subsequent replacement of larger pores by C-S-H gel and other hydration products [45]- [47]. This may account for the observed densification of the mortar matrixes, reduced porosities, and prevalence of smaller pore sizes in lime mortar due to the addition of cement.…”

Section: B Microstructural Featuresmentioning

confidence: 99%

Pore Structure as a Determinant of Flexibility in Sustainable Lime-Cement Mortar Composites

Olaniyan

2021

EJENG

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Flexibility of Lime Mortar resulting from its good permeability feature through its relatively large interconnected pore structure makes it popular as an old sustainable building material. This characteristic feature enhances its capability to suppress masonry deformation. However, its mechanical strength is weak. To address this shortcoming, cement is added to form a stronger composite. This study, therefore, evaluates the pore structure of the resulting lime-cement composite, with a view to assessing impact and sustainability of the lime’s flexibility in the overall performance of the composite. Adopting equal mix ratio (1:3) of Binder/Aggregate (B/A), mortars were prepared using lime as a lone binder, as well as other five different compositions in the ascending and descending order of lime and cement binders (i.e., 1:1, 1:2, 1:3, 2:1 and 3:1). Each composition was assessed in fresh state using Water/Binder ratio, Air Content and Bulk Density. For the hardened state assessments, mechanical characteristics and microstructural features evaluated through six (6) and twelve (12) month curing periods respectively, were considered. Results of the investigation reveal that low cumulative porosity (i.e., summation of the porosities) across the three pore regions of Inter-Nano pores (1 – 10 nm), Super-Nano pores (10 – 100 nm) and Sub-Micro pores (0.1 – 1 µm), for each of the mortars, is observed to be synonymous with low cement content, low Modulus of Elasticity, low (fc/ff), and thus, high flexibility. This observation is supported by high linear coefficient of correlation (R2 = 0.89) for the equation describing both ‘cumulative porosity’ (within the referenced three pore ranges) and cement content. Thus, it could be inferred that despite cement addition with resulting alteration in the pore structure of the composite, presence of lime would retain flexibility property of the composites, with more flexibility in the descending order of cement contents. Considering the impacts of pandemic climate change, growing energy costs and human activities on the environment, this study therefore attempts to promote revival of an old but partially abandoned sustainable lime based mortars, with a view to facilitating improved lime mortar performances, conservation of energy resources and overall protection of the environment.

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Assessment of Temperature Evolution and Early-Age Thermal Cracking Risk in Segmental High-Strength Concrete Box Girder Diaphragms

Tia

Nguyen

et al. 2021

KSCE J Civ Eng

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Development and application of microcapsule for cement hydration control

Cited by 14 publications

References 10 publications

Impact of Changing Microstructural Compositions of Lime Based Mortar on Flexibility: Case Study of Sustainable Lime-Cement Composites

Impact of Changing Microstructural Compositions of Lime Based Mortar on Flexibility: Case Study of Sustainable Lime-Cement Composites

Pore Structure as a Determinant of Flexibility in Sustainable Lime-Cement Mortar Composites

Assessment of Temperature Evolution and Early-Age Thermal Cracking Risk in Segmental High-Strength Concrete Box Girder Diaphragms

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