Autor(a/res): Thiago Grabois, Guilherme Cordeiro, Romildo Dias Toledo Filho

Resumo: This paper presents the results of an experimental study on the mechanical behavior of self-compacting lightweight concrete (SCLC). Two classes of SCLC were produced, one containing coarse lightweight aggregates and the second one with coarse and fine lightweight aggregates. The lightweight aggregate used in the concrete mix-design was expanded clay commercially available in Brazil. It were assessed the properties of fresh concrete through traditional tests such as slump flow, inverted slump flow and " V " funnel. In the hardened state the mechanical behavior was evaluated by compressive, flexural and tensile strength tests. It was also determined Young's modulus and the efficiency factor of SCLC, through the relationship between compressive strength (fc) and specific gravity (γ). The results showed slump flow diameter within 600–700 mm without segregation and " V " funnel time lower than 25 seconds. Both classes have showed 28 days compressive strength about 35 MPa, density within 1700–1800 kg/m³ and consequently high efficiency factors when compared to a normal weight concrete. The concretes also presented direct tensile and flexural strength values within 1.5–2 and 4–5 MPa, respectively.

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