Increasing the crack resistance of high-strength self-compacting concrete

نویسندگان

چکیده

The object of research is high-strength self-compacting concrete, which does not require additional vibration during laying. One the most problematic issues concretes increased cracking, associated with large shrinkage deformations such and their fragile destruction.
 A decrease in concrete was established when part cement replaced to mineral additives. This effect explained by a content and, accordingly, chemical component autogenous an increase adsorptive binding capillary moisture additives, reduces physical drying concrete. In this case, type dispersion used additive can affect significant using metakaolin amount ettringite as result reaction active Al2O3 two-water gypsum cement. It found that replacement 10 % additives leads value critical stress intensity factor (SIF), compensated fragility fracture (an area microplastic deformations). At same time, factor, but significantly affects samples. introduction (to replace cement) had positive on retention flow mixes; best results according criterion were observed silica fume, fly ash limestone. All modifiers, except for led compressive strength all terms hardening. case tensile at bending splitting, ash, compared base composition without additives.
 Comprehensive accounting obtained will allow reasonable approach design crack resistance.

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ژورنال

عنوان ژورنال: Technology audit and production reserves

سال: 2021

ISSN: ['2664-9969', '2706-5448']

DOI: https://doi.org/10.15587/2706-5448.2021.225500