Using a 1 6 cement to concrete ratio, the base-line chloride content was 0.252 % by weight of cement, which is approximately 2.5 times greater than the acid-soluble limit recommended by ACI 222 (American Concrete Institute Committee 222 2001).
The test variables include the material strengths (fy= 495 MPa; fc′= 60 and 89 MPa), cross-sectional aspect ratio (1.0 2.0) and volumetric steel-to-concrete ratio (0.13 0.17).
The considered parameters included heating time, cross-sectional dimensions, strength of the materials, steel tube to concrete area ratio and ratio of reinforcement.
The considered parameters were the heating time, cross-sectional dimension, slenderness ratio, material strength, steel tube to concrete area ratio and reinforcement ratio.
As a result, the highest compressive strength and elastic modulus were obtained in case colemanite with sizes C-75 μ and the C-45 μ added into the concrete in ratios 3% and 5%; and colemanite with a size of C-25 μ added into the concrete in ratios 1% and 0.5%, respectively.
Steel and concrete contribution ratios and strength reduction factor are proposed for evaluating the performance of CFST slender beam-columns.
Laskar's beams had the same compressive strength of concrete, a/d ratios, test span and total prestressing force as the PSFC I-Beams.
Durability Durability of Recycled Aggregate (RA) can be influenced by coarse aggregate replacement ratio, concrete age, w/c ratio, and moisture content; generally, a lower w/c ratio generates a more durable concrete mix.
Key parameters included aspect ratio, steel tube to concrete area ratio, yield strength of steel and compressive strength of concrete.
The influences of the in-fill concrete, eccentricity ratio and the width-to-thickness ratio on the resistance of the test columns are discussed.
