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CT Revision > Building Pathology > Flashcards

Building Pathology Flashcards

1
Q

What is Carbonation?

A

A chemical reaction between carbon dioxide in the air and calcium hydroxide and hydrated calcium silicate in the concrete.

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2
Q

How is Carbonation assessed?

A

Typically through an alkalinity indicator to establish the extent of carbonation and it’s proximity to the reinforcing steel.

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3
Q

How is Carbonation treated?

A

With the use / application of anti-carbonation coating system.

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4
Q

What is Wet Rot?

A

Wet Rot is a wood destroying fungi species. Typically caused by high moisture content 30 - 50%.

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5
Q

What is Dry Rot?

A

Dry Rot is another type of fungal decay. Typically caused by high moisture content 20 - 30%.
* Mycelium
* Fruiting body

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6
Q

How to treat Timber Attack?

A
  • Fix the moisture issue
  • Open up
  • Cut back timber at least 500mm beyond the last sign of fungal growth
  • Wire brush walls and affected area and treat
  • Replace timbers with new treated timbers
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7
Q

What is a speedy carbide test?

A

A calcium carbide test determines moisture content within a damp wall. A whole is drilled into the affected wall to get a sample of the masonry to check moisture levels.
4%< is high.

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8
Q

What is Schmidt Hammer testing / Rebound testing?

A

A non-destructive technique used to determine the compressive strength, surface hardness and penetration resistance of concrete.

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9
Q

What is Warm Roof?

A

Pitched = Insulation between roof rafters keeps warmth in the roof space.

Flat = Insulation above roof joists.

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10
Q

What is Cold Roof?

A

Pitched = Insulation above ceiling joists.

Flat = Insulation between roof joists.

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11
Q

What does SIPS panel consist of?

A
  1. Brick
  2. Breather membrane
  3. SIP (OSB insulation OSB)
  4. Batten
  5. Vapour Check
  6. Plaster board
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12
Q

What are the types of building listings?

A

Grade 1 = Buildings of exceptional interest, of the highest significance.

Grade 2 = Particularly important buildings of more than special interests.

Grade 2* = Buildings of special interest, warranting owners efforts to preserve them.

Grade 2 being most common.

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13
Q

What was used for St Mary car park - No dig build up?

A

1 - Geotextile membrane
2 - Cell web tree root protection - 150mm
3 - Second Layer of Geotextile membrane
3 - 30mm sharp sand
4 - Binder Course - 70 mm open textured binder 20mmø
5 - Wearing Course - 30mm open texture wearing 10mmø

Edging

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14
Q

What was used for the New Fill build up?

A
  • Sub base 250mm ~ Type 1 20mmø aggregate.
  • Binder course 70mm ~ Bit-Mac 20mmø aggregate.
  • Wearing course 50mm ~ Dense Bit-Mac 10mmø aggregate.
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15
Q

What are the 3 types of MOT aggregates?

A

Type 1 = 0 - 40 mm ~ Limestone

Type 2 = 0 - 20mm

Type 3 = 5 - 40 mm

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16
Q

What are deleterious materials?

A

These materials are prohibited for use in construction due to reliability or health & safety reasons.

  • Asbestos / ACM’S
  • Hair Plaster / Lath & Plaster
  • RAAC Planks
17
Q

What are common issues with RAAC Planks?

A
  • Rusting of reinforcement steel, leading to cracking and spalling.
  • Cracking of varying severely due to moisture & temperature movement.
  • Act independently rather than a single structure.
  • Very porous & highly permeable.

*Insufficient bearing capacity.

18
Q

What types of cracking can you get?

A
  1. Expansive cracks
  2. Inadequate baring / Propping
  3. Tie failure
  4. Subsidence
  5. Heave
19
Q

What is sick building syndrome?

A

This is a condition caused by being in a building or type of enclosed space due to poor in door air quality etc.

20
Q

What is a flat roof build up?

A
  1. Joists
  2. Decking
  3. Vapor control layer
  4. Insulation
  5. Weather proofing layer
21
Q

What are three types of mechanical fixings?

A
  • Drilled & Tapped
  • Self Tapping
  • Riv Nuts
22
Q

Name 3 different types of aluminum profiling?

A
  • Extruded aluminum
  • Pressed aluminum
  • Cast aluminum
23
Q

What are the fixings used to fix a door frame into position?

A

Fischer Fixings

24
Q

Name 3 types of sustainable alternatives?

A

-FSC Sourced timber

  • LED lighting

-Photovoltaic Panels

CT Revision (3 decks)

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