The impact of calcium stearate on characteristics of concrete

Chari, Mehdi Nemati; Naseroleslami, Ramin; Shekarchi, Mohammad

doi:10.1007/s42107-019-00161-x

Cited by 21 publications

(24 citation statements)

References 25 publications

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“…The effect of calcium stearate in the concrete has been studied intensively by some researchers, e.g., to reduce the permeability [14], to act as an accelerator and reduce the corrosion rate [15], to improve absorption in the foamed concrete [16], and also to reduce the quantity of macroscopic sale pore sized 10-100 µm [17]. The reduction of water absorption can also be applied in the concrete by adding the superplasticiser as a water reducer [18].…”

Section: Introductionmentioning

confidence: 99%

Drying Shrinkage of Concrete Containing Calcium Stearate, (Ca(C18H35O2)2), with Ordinary Portland Cement (OPC) as a Binder: Experimental and Modelling Studies

et al. 2020

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This work investigates the effect of calcium stearate (Ca(C18H35O2)2) on concrete shrinkage behaviors by using experimental testing. The test specimens are cubes with each dimension given as 100 × 100 × 285 mm for shrinkage tests and cylinders with 150 mm diameter and 300 mm height for compressive strength tests. The calcium stearate with fractions of 0, 0.1, 0.2, and 0.3% from the weight of cement are used in the tests. The results showed that the shrinkage occurred in amounts of 0.079, 0.062, 0.065, and 0.060 mm for the specimens containing calcium stearate of 0, 0.1, 0.2, and 0.3%, respectively. Moreover, we also perform shrinkage modelling to explore a possibility to incorporate the calcium stearate fraction into the standard concrete shrinkage model. There are three well-known shrinkage models used here, i.e., the Sakata, the Japan Standard and the Bazant-Baweja models, where only the latter one is capable to capture our experimental results very well for different fractions of calcium stearate.

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Section: Introductionmentioning

confidence: 99%

Drying Shrinkage of Concrete Containing Calcium Stearate, (Ca(C18H35O2)2), with Ordinary Portland Cement (OPC) as a Binder: Experimental and Modelling Studies

et al. 2020

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“…It is obvious that 1% increase in AC does not have such a detrimental impact on compressive strength because 1% increase in AC is expected to reduce compressive strength only by 3%–5% 39,40 . The reduction in compressive strength can also be attributed to micro‐cracks formed in the interfacial transitional zone (ITZ) in CS incorporating concretes 24,32 …”

Section: Resultsmentioning

confidence: 99%

“…Accordingly, the prime deviation from the standard method was the difference in the period recommended by ASTM C1585‐20 (2020) and the periods chosen in this study to conduct capillary water absorption test. Previous research studies showed that the period recommended by ASTM C1585‐20 is too short to conduct capillary water absorption test on concretes containing CS since it significantly reduces rate of water absorption 24,32 . Therefore, conducting this test on the specimens containing CS requires more time 24,32 …”

Section: Experimental Programmentioning

confidence: 99%

“…Calcium stearate (CS) is a useful damp‐proofing admixture based on fatty acids, which is reported to be beneficial to improve impermeability of different building materials under nonhydrostatic pressure 27–31 . Since the action mechanism of CS is forming a water‐repellent layer along the capillary pores without forming any pore‐blocking deposit, 8 it cannot improve impermeability under hydrostatic pressure 24,32 . Hence, simultaneous use of CS and SCMs, like SF and NZ, appears to be a solution not only to improve impermeability of cement‐based materials under hydrostatic pressure but also to enhance impermeability of these materials under nonhydrostatic pressure.…”

Section: Introductionmentioning

confidence: 99%

“…They also did not provide data related to moisture loss, which has a significant impact on drying shrinkage. Previous research projects also showed that CS had negative effects on compressive strength 24,28,32 but NZ and SF had positive effects on compressive strength 19,24 . Since compressive strength has a direct relationship with modulus of elasticity and an inverse relationship does exist between these parameters and drying shrinkage, 35 the authors want to evaluate whether the negative effects of CS on compressive strength cause any detrimental impact on drying shrinkage or not and whether NZ and SF are effective to compensate for the potential negative effects of CS on drying shrinkage or not.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Properties of cement‐based materials containing calcium stearate and supplementary cementitious materials

Chari¹,

Naseroleslami

Ahmadi³

2023

Structural Concrete

Self Cite

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Calcium stearate (CS) is effective to reduce permeability of different building materials under nonhydrostatic pressure but more actions need to be taken to shed light on its main and side effects on properties of cement‐based materials. This research project investigates the effect of CS on properties of these materials. Compressive strength analysis shows that the addition of CS at the dosage of 1% of cement weight reduces this parameter by approximately 20% but reducing water‐to‐binder ratio, and replacing 7.5% of cement weight with silica fume (SF) compensate for the strength loss caused by CS. Results of drying shrinkage test show that the addition of CS slightly increases drying shrinkage but replacing 7.5% of cement weight with SF can compensate for the negative effects of CS on drying shrinkage. Permeability analysis shows that CS is not as effective as SF and natural zeolite (NZ) to improve impermeability under hydrostatic pressure but it is more effective than SF and NZ to improve impermeability under nonhydrostatic pressure because the addition of CS at the dosage of 1% of cement weight reduces capillary water absorption by roughly 60%. Therefore, the simultaneous use of CS and these supplementary cementitious materials improves not only impermeability under hydrostatic pressure but also impermeability under nonhydrostatic pressure.

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Chloride ion penetration resistance and microstructural modification of concrete with the addition of calcium stearate

Chen

Liu

2022

Construction and Building Materials

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The impact of calcium stearate on characteristics of concrete

Cited by 21 publications

References 25 publications

Drying Shrinkage of Concrete Containing Calcium Stearate, (Ca(C18H35O2)2), with Ordinary Portland Cement (OPC) as a Binder: Experimental and Modelling Studies

Drying Shrinkage of Concrete Containing Calcium Stearate, (Ca(C18H35O2)2), with Ordinary Portland Cement (OPC) as a Binder: Experimental and Modelling Studies

Properties of cement‐based materials containing calcium stearate and supplementary cementitious materials

Chloride ion penetration resistance and microstructural modification of concrete with the addition of calcium stearate

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