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Project Title: Mechanical Properties and Durability of High-Performance Concrete with New Additives

Sponsored by: Applied Concrete Technology, Arlington Ht., IL

Research Objectives:

• Study the mechanical properties and durability of High performance concrete (HPC) incorporating new additives such as mix water conditioner (MWC) and concrete densifier sealer (CDS).
• Structural behavior of HPC with new additives

Accomplishments:

• A total of 518- 6 x 12 in. cylinders, 216- 6 x 6 x 21 in. beams, 12- 24 x 24 x 8 in. reinforced slabs, and 8- 4½ x 9 x 96 in. reinforced concrete beams were cast and tested.
• The specimens were placed in three different environments: normal environment (moisture room with 100% relative humidity under constant temperature of 23^o C, severe environment (tank with 15% by weight of sodium chloride solution) subjected to wetting and drying cycles, and in laboratory or room temperature.
• Mechanical properties such as, compressive strength, splitting tensile strength, flexural strength, modulus of elasticity, creep and shrinkage were measured at various ages.
• Air-void parameters were measured using petrographic analysis.
• Chloride ion penetration and water permeability were measured.
• Flexural behavior of RC beams subjected to severe environmental conditions.

Fig.15 Specimens in Severe environment.	Fig.16 Coulomb permeability test.
Fig.17 Creep and shrinkage test.