Title:
Development of Very Low Density Structural Lightweight Concrete
Author(s):
M. A. Caldarone and R. G. Burg
Publication:
Symposium Paper
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
DOI:
10.14359/13062
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.