Development of Very Low Density Structural Lightweight Concrete

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Development of Very Low Density Structural Lightweight Concrete

Author(s): M. A. Caldarone and R. G. Burg

Publication: Special Publication

Volume: 218

Issue:

Appears on pages(s): 177-188

Keywords: coal cinder aggregate; compressive strength; equilibrium density; lightweight aggregate; lightweight concrete; oven-dry density; rehabilitation; structural evaluation

Date: 2/1/2004

Abstract:
Structural lightweight concrete is defined as concrete made with low-density aggregate having an air-dry density of not more than 115 lb/ft3 (1850 kg/m') and a 28-day compressive strength of more than 2500 psi (17.2 MPa). This paper presents the test results of very low-density structural lightweight concrete mixtures developed in the laboratory for the purpose of finding a suitable mixture for use on a historic building rehabilitation project. Mixture parameters included a specified compressive strength of 3000 psi at 28 days and an air-dry density approaching 70 lb/ft3. Various constituent materials, mixture proportions and curing methods were examined. The result of this research exemplifies the feasibility of achieving very low densities with structural concretes.