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18 Questions

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Asphalt and Bitumen Properties Quiz

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Questions and Answers

What can cause blistering in asphalt and bitumen layers?

Biological agencies

Trapped moisture vapor pressure (correct)

Direct exposure to moisture

Contact with oil

Which of the following is true about mastics?

They harden with age

Remain pliable for a number of years (correct)

Can accommodate large structural movements

Are only used for small cracks

What should be correctly specified and detailed for long term durability of sealants?

Poor material preparation

Correct gap width, minimum depth, adhesive properties, and surface preparation (correct)

Maximum depth

High gap width

Which material is unacceptable for accommodating the movement associated with large structural elements?

Cement Signup and view all the answers

What metals are commonly used in buildings according to the text?

Steel, aluminium, copper, lead, and zinc Signup and view all the answers

Which of the following is NOT affected by biological agencies or pollution?

Metals Signup and view all the answers

What is a common cause of loss of adhesion in cementitious waterproofing systems?

Poor surface preparation Signup and view all the answers

What can lead to the embrittlement of membrane in factory-produced membranes?

Atmospheric oxidation of the bitumen Signup and view all the answers

What is a common cause of leakage in polymer roofing?

Inadequate bonded joints Signup and view all the answers

What can cause blistering in liquid membranes?

Expansion of entrapped air or moisture by solar heat Signup and view all the answers

What issue arises from cracks causing shrinkage deflection in structural substrate panels?

Loss of adhesion causing a weak undercoat Signup and view all the answers

What is a likely consequence of improper bonding material in cementitious waterproofing systems?

Excessive deformation and stresses in the substrate Signup and view all the answers

What property of bitumen makes it a suitable material for waterproofing?

Adhesive properties Signup and view all the answers

How does asphalt react when exposed to sunlight and heat?

It hardens slowly Signup and view all the answers

What should be incorporated between asphalt and supporting structure in horizontal situations to allow for differential movements?

Insulating layer Signup and view all the answers

To prevent cracking of asphalt due to continuous expansion and contraction, what should be included in vertical applications?

Screed protection Signup and view all the answers

What should be specified to lessen the effect of sunlight and solar heat on asphalt?

Reflective covering with light-colored stone aggregate Signup and view all the answers

How can mastic asphalt be protected from impact damage?

By adding a screed or similar coating Signup and view all the answers