Title:
Optimization of the Use of Lightweight Aggregates in Carbon Fiber Reinforced Cement
Author(s):
Parviz soroushian, Mohamad Nagi, and Jer-Wen Hsu, ACI Materials
Publication:
Materials Journal
Volume:
89
Issue:
3
Appears on pages(s):
267-276
Keywords:
carbon; cements; compressive strength; density (mass/volume); fibers; impact strength; lightweight aggregates; optimization; shrinkage; tests; Materials Research
DOI:
10.14359/2587
Date:
5/1/1992
Abstract:
The objective of this study was to optimize the use of lightweight aggregates in carbon fiber reinforced cement composites. For this purpose, composites with various fiber volume fractions, incorporating different amounts of lightweight aggregates with two different maximum particle sizes, were tested for flexural strength and toughness, compressive strength, impact resistance, specific gravity, and restrained drying shrinkage. The results indicated that aggregates have important effects on the overall performance of fibrous cement composites. Major improvements in the flexural and compressive strength, flexural toughness, impact resistance, and shrinkage cracking characteristics of carbon fiber reinforced cement could be obtained by incorporating at specific moments lightweight aggregates with certain maximum particle sizes into the composite. Use of aggregates with relatively large particle sizes and the introduction of relatively large amounts of aggregates, however, may damage the composite material performance.