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Fabrication of integrally hydrophobic self-compacting rubberized mortar with excellent waterproof ability, corrosion resistance and stable mechanical properties
Highlights The prepared HSCRM possesses excellent integral hydrophobicity. The fresh HSCRM shows excellent self-compacting capability. The HSCRM exhibits excellent anticorrosion property. The HSCRM possesses improved toughness and ductility.
Abstract Ordinary cement-based materials exhibit strong hydrophilicity and brittleness after hardening, which is very detrimental to their durability and service life. In this study, a low-cost and nontoxic silane-based hydrophobic agent and waste tire rubber particles are used to make integrally hydrophobic self-compacting rubberized mortar (HSCRM). The fluidity of the HSCRM is enhanced and its setting time is prolonged with increasing hydrophobic agent content. When the content of the hydrophobic agent is 2%, the HSCRM exhibits integral overhydrophobicity, with the static contact angle (CA) on the surface larger than 120°. In addition, compared with the self-compacting mortar (SCM), the immersion water absorption and capillary water absorption of HSCRM decrease by 72.1% and 89.3%, respectively, while the corrosion resistance of the HSCRM is significantly enhanced and its surface deicing process is much easier. Moreover, the 28 d flexural strength, compressive strength and splitting tensile strength of the HSCRM are 18.9%, 32.3%, and 17.2% lower than those of the SCM, respectively, but the toughness and ductility of the HSCRM are significantly improved.
Fabrication of integrally hydrophobic self-compacting rubberized mortar with excellent waterproof ability, corrosion resistance and stable mechanical properties
Highlights The prepared HSCRM possesses excellent integral hydrophobicity. The fresh HSCRM shows excellent self-compacting capability. The HSCRM exhibits excellent anticorrosion property. The HSCRM possesses improved toughness and ductility.
Abstract Ordinary cement-based materials exhibit strong hydrophilicity and brittleness after hardening, which is very detrimental to their durability and service life. In this study, a low-cost and nontoxic silane-based hydrophobic agent and waste tire rubber particles are used to make integrally hydrophobic self-compacting rubberized mortar (HSCRM). The fluidity of the HSCRM is enhanced and its setting time is prolonged with increasing hydrophobic agent content. When the content of the hydrophobic agent is 2%, the HSCRM exhibits integral overhydrophobicity, with the static contact angle (CA) on the surface larger than 120°. In addition, compared with the self-compacting mortar (SCM), the immersion water absorption and capillary water absorption of HSCRM decrease by 72.1% and 89.3%, respectively, while the corrosion resistance of the HSCRM is significantly enhanced and its surface deicing process is much easier. Moreover, the 28 d flexural strength, compressive strength and splitting tensile strength of the HSCRM are 18.9%, 32.3%, and 17.2% lower than those of the SCM, respectively, but the toughness and ductility of the HSCRM are significantly improved.
Fabrication of integrally hydrophobic self-compacting rubberized mortar with excellent waterproof ability, corrosion resistance and stable mechanical properties
Tian, Lei (author) / Qiu, Liu-chao (author) / Liu, Yi (author)
2021-08-23
Article (Journal)
Electronic Resource
English
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