3.5 Construction Tech and Env Flashcards
What are the benefits of off-site construction?
-Safety
-Efficiency
-Sustainability
-Speed
-Quality
What should you consider before excavation?
-Depth of excavation
-Nature of soil
-Proximity to buildings
-Underground services
-Water table
Techniques of waterproofing a basement?
Tanking - using materials such as asphalt, polythene sheeting, bitumen…
Drained cavity - create a cavity wall with drainage in-between to remove the water that seeps.
What are SUDS?
Sustainable Urban Drainage Systems - help reduce the reliance on existing drainage infrastructure:
-Filter drain
-Rain water harvesting
-Swale
-Green roof
-Permeable pavement
Typical road build-up?
Wearing/ surface - 20-40mm
Binder - 50-100mm
Base - 70-150mm
Subbase/type 1 - 100-250mm
Typical footpath build-up?
Similar to road build-up but sometimes you don’t need base course.
What should be considered when selecting foundations?
-The load of the building.
-Nature of the ground.
-Type of structure
-Cost.
-Construction constraints (proximity to adjacent buildings).
What are the different foundation types?
Strip foundations - typically used for masonry linear.
Pad foundations - support columns.
Raft foundations - continuous slab.
Piled foundations - columns into the ground.
What are the types of pile foundations and the construction methods?
Types of piles:
-Friction
-End bearing
-Construction methods:
-Driven
-Bored
What is the standard size of a brick?
215mm x 102.5mm x 65mm
How many standard bricks per m/2?
60
How many concrete standard blocks per m/2?
10
Can you name two different types of brick bond?
English - alternating between head and stretcher each course
Stretcher - stretcher facing half overlapped
What are the main components of concrete?
Cement
Aggregate
Water
What is a culvert?
Tunnel structure that allows water to move from one side to the other of an obstacle.