Hardened properties of self-compacting concrete — A statistical approach

Abstract

This work presents a statistical stud y on the variability of the mechanical properties of hardened self-compacting concrete, including the compressive strength, splitting tensile strength and modulus of elasticity. The comparison of the experimental results with those derived from several codes and recommendatio ns allows evaluating if the hardened behavio ur of self-compacting concrete can be appropriately predicted by the existing formulations. The variables analyzed include the maximum size aggregate, paste and gravel content. Results from the analyzed self-compacting concretes presented variability measures in the same range than the expected for conventional vibrated concrete, with all the results within a confidence level of 95%. From several formulations for conventional concrete considered in this study, it was observed that a safe estimation of the modulus of elasticity can be obtained from the value of compressive strength; with lower strength self-compacting concretes presenting higher safety margins. However, most codes overestimate the material tensile strength.

Assessment of factors influencing mechanical properties of steel fiber reinforced self-compacting concrete

“…For instance, for V f = 1% and 10 mm aggregate size, the values of TS are found to be 4.19 MPa and 3.59 MPa concerning to cement contents of 400 and 500 kg/m 3 at the age of 42 days. According to Almeida Filho et al [44], larger maximum aggregate size and higher coarse aggregates volume (i.e. smaller paste volume) leads to higher splitting tensile strength.…”

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

“…Filho et al [18] investigated the hardened properties of SCC. They found that similar to the NVC, modulus of elasticity for SCC is also sensitive to paste and gravel content.…”

Simple and Rational Methodology for the Formulation of Self-Compacting Concrete Mixes

“…Later on, research advanced in diverse fields, such as durability (De Schutter and Audenaert, 2007), test methods (U-box, L-box, V-funnel, J-ring, etc.) (BIBM et al, 2005;JSCE 1999;ACI 2007), and it transitioned, most recently, to the modeling of different behaviors in the fresh and hardened states, with multiple statistical treatment methodologies (Pepe et al, 2013;Almeida Filho et al, 2010;Sebaibi et al, 2010).…”