Design Considerations for Fire Resistance - Simplified Design of Reinforced Concrete Buildings - page 267

10.2 DEFINITIONS

Structural Concrete:

• Siliceous aggregate concrete: concrete made with normal weight aggregates consisting mainly of silica
or compounds other than calcium or magnesium carbonate.

• Carbonate aggregate concrete: concrete made with aggregates consisting mainly of calcium or magne-
sium carbonate, e.g., limestone or dolomite.

• Sand-lightweight concrete: concrete made with a combination of expanded clay, shale, slag, or slate or
sintered fly ash and natural sand. Its unit weight is generally between 105 and 120 pcf.

• Lightweight aggregate concrete: concrete made with aggregates of expanded clay, shale, slag, or slate
or sintered fly ash, and weighing 85 to 115 pcf.

Insulating Concrete:

• Cellular concrete: a lightweight insulating concrete made by mixing a preformed foam with Portland
cement slurry and having a dry unit weight of approximately 30 pcf.

• Perlite concrete: a lightweight insulating concrete having a dry unit weight of approximately 30 pcf
made with perlite concrete aggregate produced from volcanic rock that, when heated, expands to form a
glass-like material or cellular structure.

• Vermiculite concrete: a lightweight insulating concrete made with vermiculite concrete aggregate, a
laminated micaceous material produced by expanding the ore at high temperatures. When added to
Portland cement slurry the resulting concrete has a dry unit weight of approximately 30 pcf.

Miscellaneous Insulating Materials:

• Glass fiber board: fibrous glass roof insulation consisting of inorganic glass fibers formed into rigid
boards using a binder. The board has a top surface faced with asphalt and kraft reinforced with glass fibers.

• Mineral board: a rigid felted thermal insulation board consisting of either felted mineral fiber or cellular
beads of expanded aggregate formed into flat rectangular units.

10.3 FIRE RESISTANCE RATINGS

10.3.1 Fire Test Standards

The fire-resistive properties of building components and structural assemblies are determined by standard fire
test methods. The most widely used and nationally accepted test procedure is that developed by the American
Society of Testing and Materials (ASTM). It is designated as ASTM E 119 (Reference 10.2), Standard Methods
of Fire Tests of Building Construction and Materials. Other accepted standards, essentially alike, include the
National Fire Protection Association Standard Method No. 251; Underwriters Laboratories; U.L. 263;