8/17/2019 cap 4 11-20

http://slidepdf.com/reader/full/cap-4-11-20 1/2

11.- What is masonry cement? How is it used? What is mortar mix?

It is a general purpose cement, an inert limestone mixture especially designed

for making mortar. It´s used in mixtures the same way as ortland cement and

lime. !ortar mix is made "y mixing cement, lime, sand and water. It only water

needs to "e added to make up this type of mortar. It´s used for small #o"s.

1$.- What kind of lime is used in mortar? What is the lime putty? Hydrated lime

%it gi&es plasticity to the mixture'. (ime putty )uicklime. Hydrated lime

1*.-What are the two types of sand used in mortar? +atural and manufactured

sand %made of crushed tone or gra&el'

1.- What conditions should "e met "y the water used in mortar? It must "e

clean and free from organic materials, alkalis, acids, oil or salts. ny organic

material must "e a&oided.

1.- What are admixtures? /escri"e se&eral admixtures that are a&aila"le

 0hey are additi&es that change the properties of the mortar. ome of them

accelerate or retard the setting of the mortar. 2thers admixtures are used to

o3set the e3ect of the heat of the sun. 0hey also are used to extend theworka"ility of the mortars or to include more air in the mortar.

14.- What is used to gi&e color to mortar?

+aturally colored sands, ground stone or 5nely ground metallic oxides %also

car"on "lack is used'

16.- /escri"e the four "asic types of mortar used

 0ype ! %high strength mortar used in foundations and unreinforced masonry.

 0ype + %for general use a"o&e ground where high compressi&e or lateralstrengths are not re)uired. !iddle strength mortar

 0ype 2 %low strength mortar recommended for load "earing walls where the

compression does not exceed 177 psi and masonry isn8t su"#ect to free9ing and

thawing. It8s recommended for non "earing walls and for general interior use.

:efractory mortar %re)uired for laying 5re"rick.

8/17/2019 cap 4 11-20

http://slidepdf.com/reader/full/cap-4-11-20 2/2

1;.- How is refractory mortar made? <ypsum mortar?

It8s made from 5reclay. <ypsum mortar is composed of hydrous calcium sulfate

1=.- What is tuckpointing mortar? How is it used?

Is a mortar used for tuckpointing. 0his gi&es a harder, dough like mortar

$7.- What is grout? How is it used and how is it made?

<rout is a construction material used to em"ed re"ars in masonry walls,

connect sections of pre-cast concrete, 5ll &oids, and seal #oints %like those

"etween tiles'.<rout is used in reinforced walls, in "ond "eams or inside the

masonry cells. It8s made, "y &olume 1 part ortland cement, $ parts sand and $

parts of coarse aggregate, with a max. si9e of *>; inch.