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The impact of calcium stearate on characteristics of concrete

The impact of calcium stearate on characteristics of concrete Abstract Moisture and aggressive ions transferring into concrete have detrimental effects on durability of reinforced concrete structure. To tackle this problem, damp-proofing admixtures, like calcium stearate, can be incorporated in the mixture design of concrete to restrict water and aggressive ions’ ingress into concrete. Calcium stearate is a damp-proofing admixture which can provide a water-repellent layer along the capillary pores. As a result, it can reduce permeability of concrete under non-hydrostatic condition. This study investigates the effects of calcium stearate on properties of fresh and hardened concretes. To this end, 12 mixtures with different water-to-cementitious materials (w/cm) ratios but constant ratio of cement paste-to-aggregate were prepared and moist-cured for 180 days. The major outcomes of fresh concrete analysis showed that high dosage of calcium stearate in low w/cm ratios increased the air content and reduced the density of fresh concrete. It also decreased the workability of fresh concrete, regardless of the w/cm ratio and the dosage of calcium stearate. The findings of compressive strength analysis indicated that calcium stearate reduced compressive strength, even when low dosage of calcium stearate was added to the concrete mixture. Based on permeability test results, calcium stearate could improve permeability under non-hydrostatic pressure. However, incorporation of calcium stearate was not found to be an effective approach to decrease permeability under hydrostatic pressure. Finally, microstructure analysis showed that CS has adverse effect on the interfacial transient zone. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Asian Journal of Civil Engineering" Springer Journals

The impact of calcium stearate on characteristics of concrete

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Publisher
Springer Journals
Copyright
2019 Springer Nature Switzerland AG
ISSN
1563-0854
eISSN
2522-011X
DOI
10.1007/s42107-019-00161-x
Publisher site
See Article on Publisher Site

Abstract

Abstract Moisture and aggressive ions transferring into concrete have detrimental effects on durability of reinforced concrete structure. To tackle this problem, damp-proofing admixtures, like calcium stearate, can be incorporated in the mixture design of concrete to restrict water and aggressive ions’ ingress into concrete. Calcium stearate is a damp-proofing admixture which can provide a water-repellent layer along the capillary pores. As a result, it can reduce permeability of concrete under non-hydrostatic condition. This study investigates the effects of calcium stearate on properties of fresh and hardened concretes. To this end, 12 mixtures with different water-to-cementitious materials (w/cm) ratios but constant ratio of cement paste-to-aggregate were prepared and moist-cured for 180 days. The major outcomes of fresh concrete analysis showed that high dosage of calcium stearate in low w/cm ratios increased the air content and reduced the density of fresh concrete. It also decreased the workability of fresh concrete, regardless of the w/cm ratio and the dosage of calcium stearate. The findings of compressive strength analysis indicated that calcium stearate reduced compressive strength, even when low dosage of calcium stearate was added to the concrete mixture. Based on permeability test results, calcium stearate could improve permeability under non-hydrostatic pressure. However, incorporation of calcium stearate was not found to be an effective approach to decrease permeability under hydrostatic pressure. Finally, microstructure analysis showed that CS has adverse effect on the interfacial transient zone.

Journal

"Asian Journal of Civil Engineering" – Springer Journals

Published: Nov 1, 2019

References

  • . Report on Chemical Admixtures for Concrete
    ACI
  • Cement & Concrete Composites Use of natural zeolite a supplementary cementitious material
    B Ahmadi, M Shekarchi
  • ASTM C1723-16. Standard Guide for Examination of Hardened Concrete Using Scanning Electron Microscopy.
    ASTM C
  • ASTM C231/C2131 M-17a. Standard Test Method for Air Content of Freshly Mixed Concrete by Pressure Method.
    ASTM C
  • Density.
    BS-EN
  • Compressive strength of test specimens.
    BS-EN
  • BS-EN 12390-8 (2009). Testing Hardened Concrete. Depth of Penetration of Water Under Pressure.
    BS-EN
  • Method for determination of water absorption.
    BS-EN
  • Combined effect of expansive, shrinkage reducing and hydrophobic admixtures for durable self compacting concrete
    V Corinaldesi
  • Influence and effectiveness of water-repellent admixtures on pozzolana-lime mortars for restoration application
    L Falchi, P Müller, F Fontana, C Izzo, E Zendri
  • The influence of water-repellent admixtures on the behaviour and the effectiveness of Portland limestone cement mortars
    L Falchi, E Zendri, U Müller, P Fontana
  • Effect of simulataneous utilization of natural zeolite and magnetic water on engineering properties of self-compacting concrete
    M Hajforoush, R Madandoust, M Kazemi
  • Effect of water-repellent admixtures on the behaviour of aerial lime-based mortars
    A Izaguirre, J Lanas, J Alvarez
  • Effect of fatty acid soap on microstructure of lime-cement mortar
    A Lagazzo, S Vicini, C Cattaneo, R Botter
  • Effectiveness and durability evaluation of rendering mortars made with metallic soaps and powdered silicone
    M Lanzón, PA García-Ruiz
  • Evaluation of capillary water absorption in rendering mortars made with powdered waterproofing additives
    M Lanzón, PA García-Ruiz
  • Use of zinc stearate to produce highly-hydrophobic adobe materials with extended durability to water and acid-rain
    M Lanzón, E Martínez, M Mestre, JA Madrid
  • Properties of foamed concrete containing water repellents
    C Ma, B Chen
  • Improving microstructures of concrete using Ca(C18H35O2)2
    A Maryoto
  • “Resistance of concrete with calcium stearate due to chloride attack tested by accelerated corrosion
    A Maryoto
  • A simple practical method for determination of moisture transfer coefficient of mature concrete using a combined experimental-numerical approach
    M Nemati Chari, M Shekarchi, P Ghods, M Moradian
  • The effect of temperature on the moisture transfer coefficient of cement-based mortars: An experimental investigation
    M Nemati Chari, M Shekarchi, J Sobhani, M Nemati Chari
  • Prediction of chloride ingress into blended cement concrete: Evaluation of a combined short-term laboratory-numerical procedure
    M Nemati Chari, M Shekarchi, H Tadayon, M Moradian
  • Mechanical and durability properties of self consolidating high performance concrete incorporating natural zeolite, silica fume and fly ash
    F Sabet, N Libre, M Shekarchi
  • Permeability properties of self-consolidating concrete containing various supplementary cementitious materials
    R Saleh Ahari, TK Erdem, K Ramyar
  • Oxygen diffusion through hydrophobic cement-based materials
    F Tittarelli
  • Effect of hydrophobic admixture and recycled aggregate on physical-mechanical properties and durability aspects of no-fines concrete
    F Tittarelli, M Carsana, ML Ruello
  • The effect of silane-based hydrophobic admixture on corrosion of galvanized reinforcing steel in concrete
    F Tittarelli, G Moriconi
  • Comparison between surface and bulk hydrophobic treatment against corrosion of galvanized reinforcing steel in concrete
    F Tittarelli, G Moriconi
  • Effect of hydrophobization on the properties of lime-metakaolin plasters
    E Vejmelková, E Koňáková, M Čáchová, M Keppert, R Černý
  • Effect of fly ash and rice husk ash on strenght and durability of binary and ternary blend cement mortar
    N Vishvanath, Shirish V Kanthe, Meena Murmu Deo
  • Hydrophobic concrete using waste paper sludge ash
    HS Wong, R Barakat, A Alhilali, M Saleh, CR Cheeseman
  • AASHTO T358-17. Standard Method of Test for Surface Resistivity indicating Concrete’s Ability to Resist Chloride Ion Penetration. Standard by American Association of State and Highway Transport Officials.
    AASHTO T
  • ASTM C143/C143 M-15a. Standard Test Method for Slump of Hydraulic-Cement Concrete.
    ASTM C
  • ASTM C33/C33 M-16. Standard Specification for Concrete Aggregates. American Society for Testing and Materials.
    ASTM C
  • Influence of silane-based water repellent on the durability properties of recycled aggregate concrete
    YG Zhu, SC Kou, CS Poon, JG Dai, QY Li