| Abstrakt: |
The mechanical and microstructural characteristics of the High-Strength Concrete (HSC) for M50 grade and 0.31 as the w/b ratio were evaluated experimentally. A total of 31 mixes were cast with various amounts of polycarboxylate ether (PCE) chemical admixture, 0.9% weight of cement, Bio-Admixture (BA) (10 ml, 20 ml, and 30 ml), and Nano Biomass-Silica (NBS) (6%, 12%, and 18%). At 25% blending, the metrics for strength were at their best. When NBS 12% + 0.9% PCE + 20 ml BA mixing was used, the compressive, split, and flexure strength was improved at all ages. Raman bonds at 709 cm−1 expand with ternary mixed bio-concrete, peaking at higher wavenumbers. These changes are caused by the cement paste's changing chemical environment, which includes broken Si–O (Silicon-oxygen) bonds, a rise in CaCO3 (Calcium carbonate), and a 1690 cm−1 peak for urethane, which is highly present in bio-concrete. The calcite precipitations of bio-admixture mixed ternary admixture blended concrete were confirmed by Scanning Electron Microscopy (SEM). Urethane presented on concrete is highly durable, and resistant to moisture, chemicals, and thermal shock. Several synergistic equations for the growth of compressive strength were derived from experimental findings. The blending of mineral, chemical, and biological admixtures resulted in differences in the strength over the short- or long-term, which the equations could explain. Regression analysis was also used to build two correlation models for compressive strength and split tensile & compressive strength and flexural strength. These models were confirmed by the anticipated errors, which showed an acceptable range. [ABSTRACT FROM AUTHOR] |
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