Sustainable Building

Question 1

Concrete

Answer 1

Paste + aggregate + air

Question 2

Paste

Answer 2

Cement + drinking water

Better paste : reduce cement/water ration but water gives workability

Question 3

Aggregate

Answer 3

Loose, particulate material, such as sand gravel or pebbles added to cementing agent to make concrete

Question 4

Concrete formation

Answer 4

Mix aggregates water and cement (hydration)
Formation of nodes on the cement particles
Growth of the nodes till they link up
Goes on during all the life of the concrete

Question 5

Asphalt concrete

Answer 5

Mieral aggregates and asphalt (= paste)

Question 6

Coal combustion products

Answer 6

By products generated from burning coal
• fly ash
• bottom ash
• boiler slag
• flue gas desulphuration gypsum
=> can all be reuse in concrete production

Question 7

Mortar

Answer 7

Bonding material used in masonry surfacing and plastering. Especially a mixture of cement or lime, sand and water that hardens in place and is used to bind together brucks or stones

Question 8

Lime

Answer 8

Any of various mineral and industrial forms of calcium oxide differing chiefly in water content and percentage of constitutents such as magnesia, silica, alumina and iron

Question 9

Fly ash

Answer 9

Fine particulate ash sent up by the combustion of a solid fuel and discharged as an airbone emission or recovered as a by-product for various commercial uses

Question 10

Grout

Answer 10

Thin coarse mortar poured into narrow cavities to fill them and consolidate the adjoining objects into a solid mass

Question 11

Slag

Answer 11

Grayish aggregate left as a residue of blast furnaces

Mixture of silicates with calcium, phosphorus, sulphur…

Question 12

Gypsum

Answer 12

Colourless or white mineral used in the manufacture of plaster, cement, paint, school chalks

Question 13

Silica fumes

Answer 13

Ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production
Spherical particles of average 150nm diameter

Question 14

Pour concreter

Answer 14

Couler du béton

Question 15

Mould concrete

Answer 15

Mouler du béton

Question 16

Cure concrete

Answer 16

Let the concrete dry

Question 17

Cladding

Answer 17

Protective layer fixed to the outside of a builing

Question 18

Pest

Answer 18

Unwanted living organisms on the crops