Subject: concrete technology Q1. (a) Describe the effects of C3S on the properties of concrete. (b) Which source of fine aggregate is preferred and why?
Q: A: Different types of plasticizers in concrete and determine their effect on fresh concrete B: Find…
A: Solution(a)- Different types of plasticizers in concrete- 1. Citrates- They're tetra esters, formed…
Q: a. Explain the term super plasticizers. How are they useful in concrete production? b. Explain the…
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Q: choose the correct answer
A: A- 4 B- 2 c- 2
Q: Q.4: a) In accordance with TS EN 12390-3, determine the concrete strength class (grading) if the…
A: Note: We'll answer the first question since the exact one wasn't specified. Please resubmit a new…
Q: For what purpose we use Ultrasonic Pulse velocity test? Also classify the quality of concrete if…
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Q: How does one obtain a concrete sample from a batch in accordance with ASTM C172
A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: For what purpose we use Ultrasonic Pulse velocity test? Also clasify the quality of concrete i…
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Q: is the required average compressive strength to be used in your mix design? a. 3900 psi; b) 4000…
A: Concrete and rcc:
Q: Design a concrete mix which is already solved by using Eprical Formulas according to ACI and TS and…
A: Consider the example for designing A concrete mix required for construction of an industrial…
Q: Design a non-air-entrained concrete mix for a small job with a nominal maximum gravel size of 25 mm.…
A: (a) Using the nominal maximum size of coarse aggregate value 25 mm (1 in.) take the…
Q: A batch of concrete is composed of 200 lbm fine aggregate, 350 lbm coarse aggregate, 94 lbm cement,…
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Q: In the computation of deflection, For all light weight concrete, the modification factor À is a.…
A: Light weight concrete is made by using less sand. Modification factor is a function of compressive…
Q: As an engineer would you recommend the use of Fly ash instead of Portland cement, explain what…
A: Fly ash is an alternative for cement to reduce its use in the concrete mix. Cement manufacturing…
Q: The following principle is taken from Abeles (Ref. 2.32) and applicable not only to prestressing…
A: Concept- Prestressed concrete- It is a method that uses strong steel ropes, ropes, or rods to create…
Q: 1-To prevent segregation, the height of free fall of concrete should exceed 1m in any case. *…
A: 1 This statement is FALSE Height of fall to prevent segregation should not exceed 1 m.
Q: Is it necessary to still perform curing test up to its 28 day even though it has reached the desired…
A: We know that curing is the process to apply water to concrete for the completion of chemicals…
Q: State the proper procedure for filling the concrete cylinder? B. If the peak load of concrete…
A: answer1- procedure for filling the concrete cylinder- 1.first take the cylindercal shape molds…
Q: Subject: concrete technology Question:1 a) Which cement would you not use with calcium chloride? b)…
A: Brief Concept- Concrete technology- The concrete technology describes the different properties and…
Q: 6% (Q.5) Discuss the influence of plastic shrinkage of concrete? How can control of plastic…
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Q: Subject: Concrete technology Q#1: a) What are the broad types of admixtures? b) How would you…
A: (a) There are 2 broad types of admixtures: Chemical admixtures Mineral admixtures Chemical…
Q: Q1: Part a) Explain and state visual stability index, if in slump flow test there occurs clear…
A: Question is based on the concrete technology .In the question we have to explain visual stability…
Q: A cement grinding mill "A" with a capacity of 50 tons/hr utilizes forged steel grinding balls…
A: In cement mills, the hard nodular clinker from the cement kiln is ground into a fine grey powder…
Q: The target mean strength of the M20 grade concrete is 27 N/mm?. What is the value of standard…
A: To Determine Value of Standard deviation, σ
Q: From the following figure, List down the concrete matenals by any method using class "A" concrete
A: To find - The concrete materials required. ( by any method ) Given - Class A concrete.
Q: Design a non-air-entrained concrete mix for a small job with a nominal maximum gravel size of 25 mm.…
A: Given:- gravel size=25mm To find:- a. masses of components to produce 2000 kg of concreteb. volumes…
Q: Discuss the rate of concrete drying shrinkage at different ages with diagram.
A: The phenomenon that occurs due to the loss of moisture present in pores of the hardened paste of…
Q: An air-entrained concrete mix is required for a structure that is severely exposed to sulfate.…
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Q: What are the main differences between plasticizers and super plasticizers?
A: As per our guidelines we are supposed to answer only one question. Kindly repost other question as…
Q: The maximum slump height for class seal concrete is _____. a. 2 inches b. 6 inches c. 8 inches d. 4…
A: Typical slump for ordinary decorative concrete applications would be in the 4- to 5-inch range The…
Q: Concrete designs, i need solutions in 10 minutes please. Q / determine the live load can be applied…
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Q: Question: a)What is the effect of the size of cement grain on hydration reaction? b)Describe how…
A: a)Higher fineness provides a greater surface area to be wetted, resulting in an acceleration of the…
Q: 1.2 State 4 factors that can be used to balance the workability of a concrete mix. For each of these…
A: Workability The amount of energy required to overcome friction while compacting is the feature of…
Q: a) why do we need workable concrete?
A: As per our guidelines we are supposed to answer only one question. Kindly repost other question as…
Q: Design concrete mixtures according to the specifications given on ACI 211
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Q: Considering the data in the table below; Select the cement type suitable for concrete production in…
A: Concrete is the most used building material in the construction industry. It is made by mixing…
Q: Q2 c Discuss three (3) common concrete problems due to improper concreting works that can affect…
A: Given : Common concrete problems.
Q: Discuss four alternatives that increase the use and application of conventional concrete.
A: Conventional concrete refers to normal concrete mix or it is also known as conventional vibrated…
Q: Given grade 60 steel rebar and 4000 psi normal-weight concrete, (a) What is the yield strength of…
A: Yield strength & modulus of elasticity of the steel; a) The yield strength of steel (fy) is the…
Q: Four 150*300 cylindrical specimens were made from a concrete mix. Specimens were tested for 7 days…
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Q: What do you mean by the workability of concrete; why do we need workable concrete? b) How…
A: Amount of water required to produce full compaction is called as workability of concrete. We need…
Q: A light-weight concrete was cast-in-place to form a rectangular beam. If its unit weight is 17.24…
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Q: a design engineer has specified a concrete strength of 4400 psi. the ready mixed concrete producer…
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Q: Estimate the approximate quantity of Cement, Fine aggregate, Coarse aggregate and Water, for five…
A: The water-cement ratio is 0.48. Assume the size of aggregate as 20 mm. Maximum water content for 20…
Q: How various properties of aggregates affect workability of concrete? b) If the peak load of…
A: Properties of aggregate affecting workability are : Size of Aggregate The bigger the size of the…
Q: Design a non-air-entrained concrete mix for a small job with a nominal maximum gravel size of 19 mm.…
A: Given data:- Design Non-air-entrained The given nominal maximum Gravel size = 19 mm The weight of…
Q: 1-What is the bond strength between steel and concrete and how it can be calculated? 2-What is the…
A: 1.Bond Strength:- Bond Strength is defined as the force which resist the separation of two…
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- Subject concrete technology Q: a)What particular precautions would you take when concreting (i) In winter, and (ii) in hot weather? b)What are the effects of hot weather on fresh concrete?a) How various properties of aggregates affect workability of concrete? b) If the peak load of concrete cylinder in compression is 70,000 pounds, find the crushing strength of concrete? (Hint: concrete cylinder dia is 6in). SIR, PLS GIVE ME PROPER AND CORRECT ANSWER WITH FULL DETAILS. SUBJECT: CONCRETE TECHNOLOGYUrgent Take the unit weight of concrete to be 2400 kg/m3 and the specified compressive strength to be 28 MPa.From this, estimate the modulus of elasticity of concrete in GPa. (answer with complete solution) Final answer must be Ec = 26.752 GPa
- Subject: Concrete technology Q#4: a) What do you mean by the workability of concrete; why do we need workable concrete? b) How various properties of aggregates affect workability of concrete?A batch of concrete is composed of 200 lbm fine aggregate, 350 lbm coarse aggregate, 94 lbm cement, and 5 gallons of water. The specific gravity of the fine and coarse aggregate is 2.65, and that of the cement as 3.10. What is the specific weight of concrete in lb/ft³?Q1 What moisture condition should the coarse and fine aggregate be in when mixing the concrete? A Unknown B Saturated C Oven Dry D Air Dried E SSD Q2 What restriction is placed on the size of a sample of a concrete batch? A 30 L B 15 L C 20 L D 10 L E 5 L
- What is the relationship of rodded bulk density to percentage voids in aggregates? What is the purpose of this two? How can this two affect the concretea) What is pozzolanic material; what benefits can be achieved by using Pozzolana with cement in concrete? b) For what purpose we use Ultrasonic Pulse velocity test? Also classify the quality of concrete if Ultrasonic Pulse velocity is 3.0km/sec? SIR, PLS GIVE ME PROPER AND CORRECT ANSWER WITH FULL DETAILS. THANKS SUBJECT: CONCRETE TECHNOLOGYa. When is it necessary to consolidate concrete by vibration in test method C231? Discuss the process of vibration when placing and consolidating the sample.b. When rodding a layer of concrete in method C138, is it okay to hit the bottom of the measure? If not, how is it supposed to be done?c. Calculate the yield of concrete if the mass of the batch is 4800 kg and its density is found to be 350 kg/m3.
- Q2 c Discuss three (3) common concrete problems due to improper concreting works that can affect the strength and durability of concrete. Suggest how to prevent the recurrence of the problems in the future.You are assigned to monitor the concrete strength gain at a construction site. The ultimate compressive strength of the concrete at its full maturity is 450 kg/m. The average concrete temperature at the construction site is 25 °C during the day and 15 °C during the night (assuming 12-hour day/night cycles). If you assume that the datum temperature (To) is - 10 °C, estimate the strength of concrete after 14 days. (4=35, B=51)Maturity Index, M = E(T - To).Design the concrete mix according to the following conditions:Design EnvironmentBuilding frameRequired design strength = 27.6 MPaMinimum dimension = 150 mmMinimum space between rebar = 40 mmMinimum cover over rebar = 40 mmStatistical data indicate a standard deviation of compressive strength of2.1 MPa is expected (more than 30 samples).Only air entrainer is allowed.Available MaterialsAir entrainer: Manufacture specification 6.3 mL/1% air/100 kg cement.Coarse aggregate: 19 mm nominal maximum size, river gravel (rounded)Bulk oven-dry specific gravity = 2.55, absorption = 3.6,Oven-dry rodded density = 1761 kg/m3Moisture content = 2.5,Fine aggregate: Natural sandBulk oven-dry specific gravity = 2.659, absorption = 0.5,Moisture content = 2,Fineness modulus = 2.47
