Special Types of ConcreteDesign and Control of Concrete Mixtures – Chapter 20
Overview Lightweight
Concrete High Density
Concrete Mass Concrete No-Slump and
Roller-Compacted Concrete
Soil-Cement
Shotcrete Pervious Concrete White and
Colored Concrete Photocatalytic
Concrete
Structural Lightweight Aggregate Concrete
Structural Lightweight Aggregate Concrete
Structural Lightweight Aggregate Concrete
Mixing Similar to normal-weight concrete Aggregates may need prewetting
Workability Lightweight concrete exhibits better workability
for a given slump Finishing
Generally starts earlier Curing
Similar curing – added benefit of internal curing
Insulating and Moderate-Strength Lightweight Concretes
Insulating and Moderate-Strength Lightweight Concretes
Autoclaved Cellular Concrete
High-Density Concrete
Mass Concrete
Mass Concrete
Mass Concrete
Mass Concrete
No-Slump Concrete Defined by slump less than 6 mm ( ¼
in.) Slump cone is impractical
Vebe apparatus Compacting-factor test Thaulow drop table
Air entrainment is still used for freeze-thaw resistance
Roller-Compacted Concrete
Soil-Cement
Shotcrete
Pervious Concrete
White Concrete
Colored Concrete
Photocatalytic Concrete Titanium-based additions act as
catalysts in sunlight Breaks down pollution into oxygen,
water, CO2, nitrate, sulfate Well-suited for structures with high sun
exposure Can be used for streets
Study shows NOx reduction of 25-45% over control pavement
Overview Lightweight
Concrete High Density
Concrete Mass Concrete No-Slump and
Roller-Compacted Concrete
Soil-Cement
Shotcrete Pervious Concrete White and
Colored Concrete Photocatalytic
Concrete
Questions
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