WorksheetsConstruction Materials and Testing - Module 4 Part 1
Total questions: 20
Worksheet time: 20mins
Cement paste – mix of cement powder and water.
True
False
False set - the stiffening of a concrete mixture with little evidence of significant heat generation.
False
True
Hydration - the chemical reaction that takes place when Portland cement and water are mixed together. The hydration reaction is considered complete at 28 days.
True
False
Mortar – mix of cement powder, water and sand.
True
False
Water-Cement Ratio - the ratio by weight between water and cement used to make paste. The water-cement ratio should be the lowest value required to meet the design considerations.
False
True
Any material that can be made plastic and that gradually hardens to form an artificial stonelike substance is called a cementitious material.
True
False
Cement is a commonly used as binding material in the construction industry.
False
True
Pozzolan Cement: According to ACI, a pozzolan is a siliceous or siliceous and aluminous material.
True
False
Pozzolan Cement: It possesses little or no cementitious value but will, in finely divided form and in the presence of moisture, chemically react with calcium hydroxide at ordinary temperatures
False
True
Pozzolan Cement: There are both natural and artificial (fly ash, and silica fume) pozzolans.
False
True
Pozzolan Cement: The name is derived from “Pozzoulli”, a village near Naples, Rome.
True
False
Pozzolan Cement: Ancient Romans found that a cement could be made which set under water and this was used for the construction of harbours.
True
False
Pozzolan Cement: This cement was made by adding crushed volcanic ash to lime.
False
True
Pozzolan Cement: includes, but not limited to, structural concrete, precast and prestressed concrete elements, concrete pipes, grout and mortar.
True
False
Asphalt Cement: that is derived from tar or from petroleum.
True
False
Asphalt Cement: Commonly used to surface pavements, roads and highways.
False
True
Asphalt Cement: is made into plastic form by heating, and it solidify when cooled.
True
False
Portland Cement: obtained by burning a mixture of calcareous (calcium) and argillaceous (clay) material at a very high temperature
False
True
Portland Cement: Joseph Aspdin patented this process in England in 1824.
True
False
Portland Cement: Just like pozzolan cement, Portland cement is a hydraulic cement
True
False
