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EGR170-3a

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QuestionAnswer
Mortar, in addition to bonding units together, must also do what four things? 1)seal spaces between the units so they aren’t penetrated by air or moisture; 2)tie steel reinforcement and anchor bolts into walls; 3)provide a design of lines of color and shadows; 4)allow adjustment of the slight variations that occur in masonry units.
Describe type O mortar. A medium-strength mortar with a compressive strength of 350 psi. It’s used for general interior purposes with a compressive strength that does not exceed 100 psi. It must not be in contact with soil or exposed to freezing conditions.
Describe the term workability in terms of dealing with mortar characteristics. Workability is the condition of a mortar that will spread easily, cling to vertical surfaces, extrude easily from joints but not drop off, and permit easy positioning of masonry units.
What are the four major factors affecting the bond strength of mortar? The major factors affecting the bond strength are (1) the characteristics (strength) of the masonry units; (2) quality of the mortar; (3) workmanship of the mason; and (4) curing conditions.
Describe how colored mortar is made. Colored mortars are made using white masonry cement or white Portland cement and adding color pigments, colored sand, or colored masonry cements. The final color achieved is the result of blending these ingredients.
Created by: rbartholomy
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