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27 Cards in this Set
- Front
- Back
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Advantage of reinforce concrete |
Durability Low Maintenance Cost Less skilled labor High comprehensive strength |
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uses compressed air to shoot concrete onto a frame or structure. |
Shotcrete |
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Called rollercrete, is a low cement content stiff concrete placed using tech. borrowed from earthmoving and paving work. |
Roller-Compacted Concrete |
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Properties of concrete |
Setting of concrete Workability of concrete Concrete Bleeding Segregation in concrete Hydration in concete Air entrainment |
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Characteristics of concrete |
Naturally moisture and insect resistant cold, hard and noisy like stone, concrete is dense and massive. cheap and strong |
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a heavy rough building material made from a mixture of broken stone or gravel etc. |
Concrete |
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Types of concrete |
Modern High strength Ultra High Performance Micro reinforced ultra high performance Self consilidating concrete Vacuum Concrete Pervious concrete Roller compacted concrete polymer concrete |
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Is a concrete w/c uses polymer to binds the aggregate |
Polymer Concrete |
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used in permeable paving |
Previous concrete |
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Two application methods for shotcrete |
Dry mix Wet mix |
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Composition of concrete |
Aggregate Cement chemical admixtureres reinforcement mineral admixtures water |
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Disadvantage of reinforce concrete |
Uncertainty of final strength High form cost Large column section |
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Has comprehenssive strength greater than 40 Mpa. |
High strength concrete |
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Relatively new term for concrete that conforms to a set of standards above those of the most common applications, but not limited to strength. |
High performance concrete |
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Made by using steam to produce a vacuum inside a concrete mixing truck to release air bubbles inside the concrete. |
Vacuum Concrete |
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Next generation of UHPC |
Micro- reinforced ultra high performance concrete |
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Extreme fluidity |
Self consolidating concrete |
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New type of concrete that is being developed by agencies concerned with infrastructure protection. |
Ultra high performance concrete |
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common types of admixtures |
Accelerators Airtraining agents plasticizers |
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Hardening of concrete before its hydration |
setting of concrete |
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concrete can be transported placed and consolidated w/o excessive bleeding |
workability of concrete |
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large chunks of material in a concrete mix |
aggregate |
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often included in concrete |
reinforcement |
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referred as "water gain" |
concrete bleeding |
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three types of segregation |
coarse aggregate paste water |
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seperation of the constituent materials of concrete |
segregation |
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reduces the density of concrete and reduces strength |
air entrainment |
