Subject: concrete technology Question:1 a) Which cement would you not use with calcium chloride? b) Explain the mechanism of action of retarders? c) What are the advantages of using calcium chloride with Portland cement concrete?

Q: Q1) Assume we have 100 gram of cement within a closed tube, so that there is no water movement…

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Q: adhesion between cement and aggregate paste more important in highly resistant concrete 5- Why is it…

A: 1.) Temperature changes could cause cracks or sapling, distress, and aggregate expansion which leads…

Q: Q1- What is the purpose of using cement-sand mortar rather than cement paste for determining the…

A: Q-1 Using only cement to make mortar has many of problems. Like -  -large amount of shrinking of…

Q: Take the unit weight of concrete to be 2400 kg/m3 and the specified compressive strength to be 28…

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Q: The poisons ratio of concrete is between ____ to 0.21. a) 0.08 b) 0.11 c) 0.12 d) 0.15 2. Grade…

A: Poisson's ratio is the ratio of lateral strain to longitudinal strain. The range of poisson's ratio…

Q: Three 100*200 mm cylindrical concrete specimens were tested for 28 days compressive strength and…

A: Solution: Given: Three Compress strengths of same concrete sample: C1=25.5MPa C2=28.6Mpa C3=24.8MPa…

Q: Explain why increasing the water content produces a weaker concrete. What is heat of hydration.…

A: 1. The reason for which the concrete becomes weak when water content increases are that, when an…

Q: The cement paste requirement for concrete is related to the void content of the combined aggregates.…

A: The cement paste requirement for concrete is related to the void content of the combined aggregates…

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: Explain cement manufacturing process and mention major differences between dry process and wet…

A: Cement production is indeed a complicated procedure that starts with mining but instead of grinding…

Q: What's the importance of determining the soundness of cement to civil/structural engineers in the…

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Q: Differences between high alumina and quick setting cement as both of them have higher content of…

A: High Alumina Cement (HAC), sometimes known as calcium aluminate cement or aluminous cement, is…

Q: For 100g cement with w/c=0.5 and the volume of the capillary pores (Vcp ) equal to 40 ml, the degree…

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Q: Most of the main problems encountered with in-situ concrete generally related to design and/or…

A: In-situ concrete: The in-situ concrete refers to the concrete which is prepared and casted on the…

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: Subject: Concrete Technology please provide detailed solution. Q#2: a) What are the main differences…

A: Difference between the plasticisers and superplasticisers Plasticisers It is also called water…

Q: What would be the effect on the slump if there is more water in the concrete mix?

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Q: Be familiar with the properties of Portland cement and their effect on concrete.

A: Answer Properties of Portland cement Final setting time= 275 min Finneness= 330 kg/m2 Soundness=…

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: explain how to avoid voids during concrete pouring

A: we have to asked how to avoid voids during concrete pouring

Q: 1. For quality control of Portland cement, the test essentially done is A. setting time 2. Lower the…

A: All the tests namely setting time, soundness, tensile strength are essential for the quality check…

Q: State the proper procedure for filling the concrete cylinder? If the peak load of concrete cylinder…

A: Procedure for Filling the Concrete Cylinder: The concrete should be filled in the cylinder layer by…

Q: What's the importance of determining the soundness of cement to civil/structural engineers in the…

A: The soundness of Cement : 1. The soundness of cement can be defined as its ability to retain its…

Q: Having a Concrete Mix Ratio of 1: 1.5: 2.5 (by mass), what is the mass of Sand needed to create a…

A: step 1-

Q: For a concrete mix having a water-cement ratio of 0.48, water content of 190 kg/m3, and the ratio of…

A: Water cement ratio = .48 Water content  = Ww = 190 Kgm3 The ratio of coarse to fine aggregate = WCA…

Q: What are the main reasons of concrete segregation? What are the main causes of plastic shrinkage…

A: Solution: 1. Concrete segregation is defined as the process of separation of concrete into its raw…

Q: A blended cement concrete with 30% slag is used to place a 6 foot tall column in a single pour. The…

A: Since you have asked multiple questions, only first question will be solved for you. If you want any…

Q: Pick out the correct statements from the following (Note: there may be more than one correct…

A: Cement with greater specific surface area set faster than lower specific surface area cement.  So…

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: If a cement has a normal consistency of 27.1 % does the cement satisfy ASTM standard required for…

A: If a cement has a normal consistency of 27.1 % does the cement satisfy ASTM standard required for…

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: State and explain the qualities of good cement. Explain each qualities thoroughly

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Q: Explain and interpret the effects of the water/cement ratio in concrete, the fineness of the cement…

A: Concrete is composed of cement, water, coarse and fine aggregate. Each component of concrete is…

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: what are the effects of the Acid Attack Test, Chloride Attack Test, and Sulphate Attack Test on the…

A: The geopolymer concrete consists of materials such as fly ash, ground granulated blast furnace slag…

Q: Part A) When concreting is needed to be performed in extreme hot weather. What are the different…

A: Since the Question number to be solved is not specified, the solution for Question No 01 A is as…

Q: 7.43 Three batches of concrete were prepared using the same materials and ingre- dients, except that…

A: Given,

Q: WHAT IS THE SIGNIFICANCE OF THE SLUMP TEST AND HOW WOULD YOU EVALUATE THE RESULT? 2. WHY IS THE…

A: As per guidelines we need to answer only 1st question, so please repost rest question separately.

Q: Q2 c Discuss three (3) common concrete problems due to improper concreting works that can affect…

A: Given : Common concrete problems.

Q: Design a concrete mix which is already solved by using Eprical Formulas according to ACI and TS and…

A: Consider this example for designing the concrete mix Example : A concrete mix required for…

Q: Why is it necessary to measure the air content of concrete at the job site rather than at the batch…

A: The air content of concrete is measured in job site rather than batch plant because there will be…

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: Discussion 1- Compared between water / cement ratio required for standard consistency with range…

A: (Disclaimer: Since you have asked multiple questions, we will solve the first question for you. If…

Types of Cement

Cement is a fine mixture of limestone, chalk, or marl and clay which when mixed with water, becomes compacted due to the formation of strong molecular bonds. Due to hydration, cement turns into a hard mass when left for a sufficient amount of time upon mixing with water. The water turns the cement compounds into gel-like submicroscopic particles having higher surface areas. It is due to the hydration properties of cement, they are often known as hydraulic cement. For instance, Portland cement is a popular example in this category.