Mechanical Properties of Polymer-Modified High Performance Lightweight Aggregate Concrete

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Title: Mechanical Properties of Polymer-Modified High Performance Lightweight Aggregate Concrete

Author(s): J.A. Rossignolo and M.V.C. Agnesini

Publication: Special Publication

Volume: 207

Issue:

Appears on pages(s): 417-434

Keywords: lightweight aggregate; mechanical properties; polymer-modified concrete; styrene butadiene

Date: 10/7/2002

Abstract:
This paper deals with the properties of styrene butadiene latex (SBR)-modified lightweight aggregate concrete (LWAC) for thin precast components, made with two Brazilian lightweight aggregate (LWA). Water reduction capacity, air content, flow table after 2 h, compressive strength, splitting-tensile strength, flexural strength, modulus of elasticity, stress-strain behavior and water absorption were tested. The 7-day compressive strength and the dry concrete density varied from 39.7 to 51.9 MPa and from 1460 to 1605 kg/m3, respectively. The modulus of elasticity at 7 days, which varied from 17.9 to 22,6 GPa, was lower than that typically observed for normal-weight concrete at the same compressive strength level. The inclusion of SBR in the LWAC decreased W/(C+S) and water absorption level. The inclusion of SBR in the LWAC decreased W/(C+S) and water absorption and increased splitting-tensile and flexural strengths.