Basically, there are four types of Portland cements. Which one of the followings is more suitable for cold weather? a. Type C: Low heat cement b. Type A: Normal Portland Cement Oc. Type B: High early strength Od. Type D: Sulphate resisting cement
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- The composition of a certain brand of cement is given (C3S = 16.0%, C2S = 38.0%, C3A=11.0% and C4AF = 8.0%) the type of cement is Ordinary Portland cement Sulphate resisting cement Low heat cement Rapid hardening cement Which cement is used for mainly building construction where strength required with age. Rapid Hardening Cement Low Heat Cement Quick Setting Cement Portland Pozzolana CementMain Compounds of Portland CementWhich compound of cement is responsible for strength of cement? a. Magnesium oxide b. Silica c. Alumina
- The relative amounts of the four chemicals in the final cement depends on the desired properties of the cement concrete. The table below gives the typical compound composition of different types of Portland cements Compound Composition No. C3S C,S C3A C4AF 1 60 13 9. 8 40 40 4 3 26 50 5 12 4 50 24 11 5 42 33 5 13 Depending on the properties of the different chemicals and their relative composition, identify the high early strength (HE) and low-heat (LH) cements from the table. Give detail explanation for your answerWhich cement is used for mainly building construction where strength .required with age Rapid Hardening Cement Quick Setting Cement Low Heat Cement Portland Pozzolana Cement The composition of a certain brand of cement is given (C3S = 53.0%, C2S = 18.0%, C3A-12.0% and C4AF = 8.0%) the type of cement is i need clear ans and solve very very fast in 20 min and thank you | DYBALA 4 Sulphate resisting cement Ordinary Portland cement Low heat cement Rapid hardening cementThe composition of a certain brand of cement is given (C3S = 53.0%, C2S = 18.0%, C3A=12.0% and C4AF = %3D 8.0%) the type of cement is * Sulphate resisting cement Rapid hardening cement Ordinary Portland cement Low heat cement For the If the chemical composition of cement is as follows (CaO=60%, SIO2 =25.6%, Al2O3= 3.8%, MgO=4%, SO3=2.1%, C4AF=13.7%) the type of cement is * White cement None of the above Expansive cement Pozzolanic cement
- In designing a concrete mix, if the amount of mixing water is estimated at W = 185 Kg/m, the SSD weight of the coarse aggregate is 1045 Kg/m, and the SSD weight of the fine aggregate is 617 Kg/m. The coarse aggregate has a moisture content of 1% and an absorption capacity of 2%. The fine aggregate has a moisture content of 2% and an absorption capacity of 5%. The adjusted weight of mixing water (in Kg/m³) is: O 177 O 214 156 193 O 172 O O O O OWhich of the following material is/are used as an accelerator’s additive for cement? a. Sodium Chloride b. Caustic Soda c. Calcium Chloride d. Nitrogen e. Barite f. Bentonite g. GypsumAlthough the constituents of concrete (aggregate and hydrated cement paste) behave in a linear elastic manner if stress is applied to them and the resulting strain is measured, concrete is not a linear elastic material throughout its entire stress-strain curve. What is the main reason for the deviation from this behavior? Interfacial transition zone (ITZ) Incomplete hydration of cementitious phases The loading rate applied according to ASTM C 39 presence of C-S-H very close to the aggregate/paste interface
- The composition of a certain brand of cement is given (C3S = 16.0%, C2S = 38.0%, C3A-11.0% and C4AF = 8.0%) the type of cement is Rapid hardening cement Low heat cement Sulphate resisting cement Ordinary Portland cementThe composition of a certain brand of cement is given (C3S = 53.0%, C2S = 18.0%, C3A-12.0% and C4AF = 8.0%) the type of cement is i need clear ans and solve very very fast in 20 min and thank you | DYBALA Sulphate resisting cement Ordinary Portland cement Low heat cement Rapid hardening cementWhich of the following materials is/are a good weight additive for cement (include both weight increase and weight reduction)? a. Bentonite b. Barite c. Hematite d. Sand e. Nitrogen