Chloride Ion Diffusion Resistance of Bulk Hydrophobic Concrete: Comparison of w/c and Dosages
نویسندگان
چکیده
Abstract Post-cast application of hydrophobic agents onto hardened concrete is successful at reducing external ion diffusion into cement paste, this work examines pre-cast admixtures in fresh concrete. Concretes, with water to ratios (w/c) 0.45 and 0.50 (CEM I; low C3A), were mixed. Adding alkyltrialkoxysilane or triacylglycerol ranging from 1 3 wt%cem these concretes evaluated. Increasing the dosage decreased compressive strength. The usage did not hinder further development microstructure as all gained strength after one year, but same percentage increase reference Chloride diffusion, exposure wt% NaCl solution 20 °C for 91 days, admixture showed slight reductions rate (8-17%) compared reference. At wt%cem, better hindering effects inward chloride was especially evident w/c = 0.45. Equivalent addition alkyltrialkoxysilane-based increased ions transferred matrix.
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ژورنال
عنوان ژورنال: Nordic concrete research
سال: 2023
ISSN: ['2545-2819', '0800-6377']
DOI: https://doi.org/10.2478/ncr-2022-0020