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CIVE 2700 Quiz 1 (Lec 1 - 8)

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CIVE 2700 Quiz 1 (Lec 1 - 8) Approximately 15 to 30% of cement clinker is dicalcium silicate (C2S). True or False? - ✔✔True To avoid failure, the applied stresses (σ) should be less than the s... trength (σallowable) of the material. True or False? - ✔✔True In Saturated Surface-Dry (SSD) condition, the aggregates can absorb water to fill the voids. True or False? - ✔✔False In normal strength concrete, one expects the strength of the aggregate particles to be greater than that of the Portland cement paste. True or False? - ✔✔True High permeability is recommended for the concrete exposed to harsh and corrosive environment. True or False? - ✔✔False. You have been asked to design a concrete mix for piers of marine structure with a medium sulphate exposure. The piers are large (4x4m). Choose two types of cement that are the most suitable for this application. - ✔✔Type 20, Type 40 Most important disadvantage of the heat in concrete - ✔✔Can create no uniform thermal fields in the concrete and cause cracking. You have been asked to design a concrete mix for piers of a marine structure. The piers are large (4x4m). Choose two very major concerns in choosing the cement type. - ✔✔1. Exposure to seawater and corrosion 2. Amount of heat released in the large element and massive concrete pouring What type of sieve-analysis curve meets the grading limits defined in the ASTM-C33? - ✔✔The curves represent the upper and lower limits. If the curve drawn for the test sample falls within the limits of the curve (between the two lines), the sample satisfies the approved standard or specification (Lecture 3) The most important advantage of the heat in the concrete - ✔✔Can help the fresh concrete from freezing in cold weather [Show More]

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