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Home > Publications > 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.
Title: Development of Lightweight Durable Fiberglass-Reinforced Concrete (FRC)
Author(s): Hiro Takada, Ikuo Uchida, and Takayuki Sakurada
Publication: Special Publication
Appears on pages(s): 179-188
Keywords: drying shrinkage; fiber reinforced concretes; fire resistance; flexural strength; foaming agents; freeze-thaw durability; glass fibers; lightweight concretes; low-alkali cements; walls; Materials Research
Abstract:By lightening the weight of the building material, the vertical load can be decreased. This minimizes the quantity of material required for earthquake resistance. Furthermore, it increases on-site productivity. The objective of this study is to develop lightweight, durable L-FRC, and to apply it to the exterior walls of buildings. Structural design demands many performance specifications for the exterior walls--specific gravity, panel weight, flexural strength for maximum wind pressure, fireproofing, drying shrinkage, and freeze-thaw durability. The physical properties of L-FRC are produced by calcium-silicate-slag-type low alkaline cement, anti-alkali glass fiber, and a special chemical admixture that includes a superplasticizer, foaming agent, and other additives. The physical characteristics of L-FRC are obtained from laboratory tests, actual-size experiments, and construction work using L-FRC. The main results are: 1) The specific gravity is nearly 1.28, and the unit weight of the panel is 115 kg/mý (1.13 kN/mý) (7 days); 2) The flexural strength of specimens is 12.8 MPa (14 days) and that of full-scale panels is 8.80 MPa (28 days); 3) The compressive strength is 21.6 MPa (14 days); 4) L-FRC is officially recognized as a fireproof material; 5) The rate of drying shrinkage is less than 5 x 10-4 (180 days); 6) The durability factor is more than 90 percent. The physical characteristics of L-FRC were sufficiently greater than the specified standards for these characteristics. Therefore, exterior wall work can be satisfactory and successfully completed in a shorter period.
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