regate is not preferred in concrete.
Q: Q.2 Total absolute volume of concrete mix is 2.37, and the % volume of water in the mix is 19%. Find…
A: Hi! Thank you for the question As per the honor code, We’ll answer the first question since the…
Q: Find the specific the surface in cm2/g of the fine aggregates knowing that its specific gravity is…
A: Given Data: The specific gravity of a fine aggregate is, G=2.65 g/cm3 The correction factor for all…
Q: Provide the ASTM for Specific Weight of ff: a. Fine Aggregate b. Coarse Aggregate:
A: I have solved your problem
Q: 7. As the fineness modulus of the sand used in a concrete mix increases the ratio of fine aggregate…
A: Fineness modulus of aggregates represents the average size of the particles in the aggregate by an…
Q: 27. is used to construct very thin, hard and strong surface. А. О R.C.C. В. О PSC С. ОРСС D. O…
A: Answer :- Option d Ferro- Cement Ferro- Cement is used to construct very thin, hard and strong…
Q: Rate of Tricalcium silicate (C3S) is higher in Type III cement.
A: Given statement: Rate of Tricalcium silicate (C3S) is higher in type III cement. Tricalcium…
Q: Separation of coarse aggregates from mortar during transportation is known O bleeding O creeping…
A: Bleeding generally means when water is start coming out of freshly prepared mix . Segregation means…
Q: -Cement paste is prepared by using cement +sand +water O cement +water cement +sand cement +sand…
A: Cement paste
Q: Reasons for the following: 1- Plastic molds are the most preferred in concrete casting
A: In basic terms we define concrete casting as a construction technique where the formwork are used as…
Q: Alkaline Silica gel can be avoided by decreasing alkaline concentration in cement around to 9%…
A: Alkali silica gel can be avoided by Reducing w/c content Using fly ash pozzolana as a substitute…
Q: Hydration of which compound is responsible for increase in strength of cement in later age? (a)…
A: Tricalcium aluminate is responsible for flash set. Di-calcium silicate is responsible for strength…
Q: B: Design a concrete mix to be used in a concrete substructure that subject to a moderate sulfate…
A: first calculate the mean target strength fmean=fck+1.65σ=30+1,65×50=38.25n/mm2 now assume water…
Q: Any potable water is suitable for making concrete. However, some nonpotable water may also be…
A: Portable water Portable water is defined as water that is suitable for human consumption i.e, water…
Q: + 8 O Shapes nik to Shape The constituent compound in Portland cement which reacts immediately with…
A: Here they ask for The compound of Portland cement which reacts immediately with water and also sets…
Q: The the aggregate, the is the magnitude of creep Stronger, less O Weaker, more O Weaker, less O…
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Q: choose the correct answer With more coarse aggregate, does the quality of materials change from…
A: Basic concept introduction- Coarse aggregate- These aggregates fall in the size range of greater…
Q: Interlocking in hardened concrete mix is better achieved by Select one: O a. None of them O b. Round…
A: Interlocking in hardened concrete mix is best acheived by using angular aggregates rather than…
Q: Choose one of the two potential aggregate problems below and discuss how it is a problem: a.…
A: The potential aggregate problem: Aggregates are added to concrete to reduce the heat of hydration…
Q: The rate of evaporation of water from concrete mix as time --, thus loss of water leads to less…
A: We have asked for this question evaporation of water in concrete mixture is loss of water leads to…
Q: Q2/ Fill up the blanks in the following: 1- Limestone in manufacture of Portland cement sources…
A: Cement is the binding material used in concrete or mortar, in which the Ordinary Portland cement is…
Q: Gypsum is used as an admixture in cement grouts for (a) accelerating the setting time (b) retarding…
A: Gypsum is used as an retarder . It slow down the chemical process in cement so that it remain…
Q: A concrete mix has a proportion of 1:0.4:1.8:2.5 (P:W:S:G). In the powder content, 90% percent is…
A: Solution:
Q: Design a concrete mix for construction of an elevated water tank. The specified design strength of…
A: Given, Mix design data
Q: 1- Limestone in manufacture of Portland cement sources of.. 2- Wet process containing 3- The…
A:
Q: The percentage of aggregates of fine-ness modulus 2.7 is to be mixed with coarse aggregate of…
A: Given data: The percentage of aggregates of fine-ness modulus (FM) = 2.7 be x It is to be mixed with…
Q: Hydration of cement is due to chemical action of water with * Gypsum Tricalcium aluminate and…
A: Option D is correct...
Q: coarse aggregates, fine aggregates, fil 26 27 and 102 are mixed in the
A: G1=W1+W2+W3+W4 W1G1+W2G2+W3G3+W4G4W1,W2,W3,W4 can be in weight or percentages
Q: Design a concrete mix (using DOE method) for a reinforced concrete work. The percentage of…
A: DOE method: DOE method is the most common method used for mix design in the United Kingdom. This…
Q: Design a concrete mix for construction of an elevated tank. The specified characteristic strength of…
A: Given: The characteristic strength of concrete is 30 MPa. The standard deviation is 4 MPa. The…
Q: 10).. is a some of the water in the mix tends to rise to the surface of concrete. a) Segregation b)…
A:
Q: Which of the following statements is correct? A) Pozzolans react with Calcium Silicate Hydrate…
A: Pozzolans are silicate-based compounds that combine with the calcium hydroxide produced whenever…
Q: Pozzolans materials chemically react with. CaS, which is normally present in the largest amounts,…
A: 1. Pozzolans materials chemically react with the Calcium Hydroxide to form cementitious properties A…
Q: Which of the following directly causes sulfate attack in concrete? CH Delayed ettringite formation…
A: Sulfate attack in concrete is mainly caused by the reaction of sulfate ions with calcium hydroxide…
Q: rding to the following conditions. Design Environment Pavement slab, (cold climate) Required design…
A: Given : Required design strength = 3000 psi Slab thickness = 12 in. Statistical data indicate a…
Q: The following materials are added to cement mixtures and compositions. What is their role in this? -…
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Q: What is the comparison of two main process which is dry and wet process in manufacturing PorHland…
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Q: Which of the following is considered as the positive effects of portlandite (Ca (OH) 2) in cement.…
A: The portlandite crystal do not bring any strength to concrete but it has advantage that, it…
Q: Discusse Reinforced Cement Concrete (RCC) used in Costal marine construction
A: Coastal structures are the ones which are constructed in the water. These are also known as marine…
Q: Design a concrete mix for construction of an elevated water tank. Required Slump = 3". Maximum Size…
A: Let us design the mix using ACI 211.1 for a 1 m3 concrete as shown below : 1) Calculation of mixing…
Q: Which of the natural stones below cannot be used as a concrete aggregate O a. Gypsum b. O b. Basalt…
A: Answer is Gypsum Because When water is Added in Gypsum It loses Its shape and Becomes a paste So We…
Q: Design a concrete mix for construction of an elevated water tank. Required Slump = 3”. Maximum Size…
A: Given, Concrete mix design data
Q: The most effective and practical supply of moisture (curing) on a reinforced concrete column A)…
A: Disclaimer Since you have asked multiple questions, we will solve the first question for you. If you…
Q: 19 - Which of the following does not affect the aggregate gradation in concrete? A) Special concrete…
A: Impact of Aggregate gradation in concrete: Slump of concrete Air content Strength Void ratio…
Q: 20 - Which of the following does not occur if the material under 63 micron exceeds 4% in the…
A: Workability decreases as fine particles increases
Q: Design a concrete mix for construction of an elevated water tank. Required Slump = 3”. Maximum Size…
A: Required Slump = 3” = 76.2 mm . Maximum Size of Aggregate is 19mm. The specified design strength of…
Q: Los Angeles abrasion test evaluates the aggregates' soundness and durability. Select one: O True O…
A: Los Angeles abrasion test is used for the aggregates to be used for highway material.
Q: 5- Cement is manufactured by burning a mixture of.. .. and at high temperatures in a kiln.
A: The main constituents of cement is argillaceous and calcareous material. Argillaceous materials are…
Q: 1- Plastic molds are the most preferred in concrete casting
A: since these questions are different chapters so as per bartleby guidelines here i am solving first…
5 - Why dolomitic aggregate is not preferred in concrete.
A) Increases the vacancy rate.
B) It creates expansion.
C) All
D) Because it is inert
E) Increases permeability.
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- Reinforced concretes are usually attacked by water and rusted. This is due to, a. Low density cements or high porosity that allow water to reach the steel b. The expansion of the rust as it has higher volume than steel push the cement cover and break it c. All the options d. None of the options e. The cover thickness is too small (the steel is too close to the end of the concrete block)Which of the natural stones below cannot be used as a concrete aggregate? Gypsum a. Basalt Ob. Limestone d. Quartz(a) In general, which provides better fire performance, carbonate or silicate aggregates? Why? (b) Why does fire design incorporate a load reduction factor (Dfire) = 1.0? (c) Two identical beams (Beam 1 is simply supported, and Beam 2 is fully restrained) are heated under similar conditions. What does the mechanical strain equal to in each of these beams? (d) A design office located in Clemson, SC (with a branch in San Francisco, CA) envisions designing a new composite member made of steel and timber. This to-be designed member is expected to be used in wildfire-prone regions primarily for single family homes. Comment on how you would design such a member to achieve superior fire performance. (e) Plot and discuss the expected degradation faces in three bending elements (say, beams) to be made from concrete, steel and timber?
- Answer by true or false for the following Aggregate is said to be sound when volume changes results in the deterioration of concrete. a- True b- FalseAnswer by true or false for the following Using alkaline water in mixing concrete reduces the possibility of the alkali-aggregate reactivity. a- True b- FalseF 1. The "slump" test is used to determine the compressive strength of a concrete. (F) 2. For room temperature and axial loadingaluminum behaves as a brittle material. T. T 3. Proper curing is important for a concrete specimen to gain compressive strength. T. (F 4. Concrete usually has a good tensile strength. T F 5. The units of the modulus of elasticity are the same as for axial stress. T F 6. Plasticity is characterized by return of a ħaterial to original size & shape upon removal of stress. т F 7. Strain hardening increases the elastic strength of the material. T F 8. Some materials do not exhibit a well defined yield point. T F 9. The failure behavior of our aluminum specimen in our torsion test was expected. T F 10. Necking of a steel specimen loaded in tension is an example of Poisson's ratio.
- Compute the Fineness Modulus for fine aggregate.Compressive strength developed with the age of hardening and decrease with the increase of water addition to the mix. Whilst, the last one is adversely related with the flexural strength of the concrete. * True False Other:Although 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 concrete strength. Concrete becomes more brittle and v tends to decrease as the concrete strength increases.choose the correct answer With more coarse aggregate, does the quality of materials change from less to better quality? a-yes b-noF 1. The "slump" test is used to determine the compressive strength of a concrete. T 2. For room temperature and axial loading,aluminum behaves as a brittle material. T. F 3. Proper curing is important for a concrete specimen to gain compressive strength. (F) 4. Concrete usually has a good tensile strength. T F 5. The units of the modulus of elasticity are the same as for axial stress. F 6. Plasticity is characterized by return of a material to original size & shape upon removal of stress. T. F 7. Strain hardening increases the elastic strength of the material. F 8. Some materials do not exhibit a well defined yield point. F 9. The failure behavior of our aluminum specimen in our torsion test was expected. T. T F 10. Necking of a steel specimen loaded in tension is an example of Poisson's ratio.