Problem 6: A concrete is mixed and used to cast abridge deck during a very cold weather withtemperatures below -10°C. Answer the followings:1) What would happen to concrete during early hoursafter casting?2) How would this impact the long term properties ofconcrete?3) How could you reduce the negative impact on concreteat such low temperatures? Explain?4) If the same concrete was cast under very hightemperatures, answer questions 1-3?5) If the same concrete was cast under normaltemperatures then exposed over many years to freezingand thawing cycles, describe why concrete may bedamaged and how to reduce this damage? Is there asimilarity between damage mechanisms as a result ofcasting under low temperatures and that from freezingand thawing?6) What are the threshold values for moisture content andpercentage of saturated pores to cause damage byfreezing and thawing? (Hint: Dry concrete will never bedamaged by freezing and thawing).

Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Answered: would happen to concrete during early…

Engineering

Civil Engineering

would happen to concrete during early hours casting?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: What do you mean by concrete's workability, why do we need it, and how do different aggregate…

Q: The quality control of concrete construction is an important part of concrete sub project.

A: CONCRETE IS THE IMPORTANT THING IN CONSTRUCTION WORK. CONCRETE IS PRODUCED IN BATCHES AT SITE…

Q: The strength of a fully matured concrete sample is 500 kg/cm2. When cured at an average temperature…

Q: Is it possible to mix concrete using fine aggregates?

A: The given Question is, whether it is possible to mix the concrete using fine aggregates.... Well,…

Q: Discuss the change in volume of concrete at early ages.

A: To discuss: The change in volume of concrete at early ages.

Q: Name and explain at least three different methods of curing.

A: Curing: curing is the process of applying external moisture to the newly laid concrete to reach its…

Q: The strength of a fully matured concrete sample is 500 kg/cm². When cured at an average temperature…

A: Given data Day temperature (Td) = 20°C Night temperature (TN) = 10°C Datum temperature (To) =…

Q: What is lightweight concrete, and how does it work? What are the uses of lightweight concrete that…

Q: What are the alternatives available to conventional concrete? Explain them in detail.

A: Concrete is most widely used material in world for construction purpose due to its properties.Due to…

Q: How long can ready-mix concrete remain in the mixer and still be used?

A: Time to be used of Ready Mixed Concrete (RMC) after mixing the water:

Q: What is the meaning of tablet lamination and capping? How are these related to compression force?

A: Tablet lamination and capping:

Q: Does fine aggregates suits concrete mixing

A: The goal of good concrete mix design is to blend aggregates to minimise the space between…

Q: Reflection on Green concrete technology

A: Green concrete technology What is Green Concrete Technology Green Concrete is a revolutionary topic…

Q: Explain how would you improve the bond of fresh concrete to hardened concrete

A: The fresh concrete is the concrete at its initial stage of hardening, which is at plastic state.…

Q: Concrete Technology/// Practicals.

A: Given: 2) Initial setting time.

Q: Why is gypsum important in the performance of concrete? What is the importance of gypsum in…

Q: What do you mean by the workability of concrete and why do we need workable concrete and how various…

A: Workability of concrete Workability of concrete is defined as the how easily a mixture of fresh…

Q: Why is the flexural strength usually neglected in designing concrete structural members?

A: Before Coming into why Flexural strength is neglected in designing Concrete structural members…

Q: How do the properties of aggregate affect the quality of the concrete mix?

Q: Explain what is meant by honeycomb in concrete?

A: The word "honeycombing" refers to parts of the ground that are gritty and stony. That could be…

Q: How to transport concrete from where it is mixed to the area where they are to be used

A: Context: Transportation of concrete

Q: Can a natural fiber become an additive in concrete to improve its performance? Why?

A: Yes, a natural fiber can be an additive in concrete to improve its performance why because Fibres…

Q: Why is extra water harmful to fresh concrete, but good for concrete after itreaches its final set?

A: Answer Introduction In the mixing of the concrete, water is the important and most useful…

Q: What is the importance of flexural strength in concrete?

A: Flexural strength is defined as the measure of the tensile strength of the concrete. Actually it is…

Q: If we wanted to determine the flexural strength of concrete, what shape should the specimens have?

A: Flexural strength of concrete is very essential for beam structures. The main purpose of the beam…

Q: Explain the effects of chemical and pozzolanic admixture on the fresh and hardened properties of…

A: Solution: Producers use admixtures to reduce the cost of concrete construction to modify the cost…

Q: Explain Fastening to Concrete and how many types.

A: Concrete Fasteners Whenever we affix nonstructural items to concrete, such as shelving, picture…

Q: Explain the techniques used to study the concrete behavior at microscopic level.

A: Microscopic level is under under microscope which is 100 times for magnificent is used to study…

Q: what could be the benefits of putting egg on a concrete mixture? Can you give some explanations and…

A: When combined with concrete, eggshells are proved to possess strength characteristics.

Q: When is the Concrete susceptible to cracking?

A: Concept: Complete/incomplete separation of concrete into two or more parts as a result of fracturing…

Q: 1. What are the main reasons of concrete segregation? 2. What are the main causes of plastic…

A: Answer NOTE- According to Bartleby guidelines only give the answer of the first question. If you…

Q: How do you calculate the unit weight of concrete?

A: concrete is a heterogenous mix of coarse aggregate,fine aggregate, admixture and water in specific…

Q: How does gypsum affects the performance of concrete?

A: Context: Gypsum in concrete

Q: Why we need to know the Properties of Fine Aggregate and how it is important for concrete

Q: What is the relationship of rodded bulk density to percentage voids in aggregates? What is the…

A: Rodded bulk density And void percentage in aggregates Rodded bulk density is nothing but the…

Q: How do all stabilizing techniques increase the strength of aggregate??

A: Given: Aggregates…

Q: What do we mean by curing concrete? What will happen if concrete is not cured?

A: Curing : Curing is the gradual process of application of moisture content or water to…

Q: (a) Describe three (3) pozzolanic materials that are being used increasingly by the construction…

A: Pozzolonic material is essentially solicitous or aluminium compound which in itself do not possess…

Q: Why is strength the property most valued in concrete by designers and quality control engineers?

A: Among the properties of any materials which govern their feasibility to be used in intended place or…

Q: According to ASTM C33 Standard Specification for concrete Aggregates, what is the nominal maximum…

A: Nominal maximum size: The minimum size through which the entire aggregate passes

Q: minimum requirements of concrete must meet to in order to be useful as construction product?

A: Concrete is a composite material made up of cement, sand, coarse aggregates, water and chemical…

Q: If concrete has a compressive strength of 3200 psi at ambient temperature, what would be the…

A: Given: The compressive strength of concrete is 3200 psi. The temperature is 700oC.

Q: What is the fineness modulus of this aggregate?

Q: What are the common minerals found in various kinds of aggregates used in concrete?

A: Finding out common minerals found in various kinds of aggregates used in concrete.

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

A: It is necessary to measure the air content of concrete at the job site rather than at the batch…

Q: what is the value of gel porosity in concrete ?

A: Brief Concept Introduction: Concrete: It is the mixture of cement (binding material), aggregates,…

Question

Problem 6: A concrete is mixed and used to cast a
bridge deck during a very cold weather with
temperatures below -10°C. Answer the followings:
1) What would happen to concrete during early hours
after casting?
2) How would this impact the long term properties of
concrete?
3) How could you reduce the negative impact on concrete
at such low temperatures? Explain?
4) If the same concrete was cast under very high
temperatures, answer questions 1-3?
5) If the same concrete was cast under normal
temperatures then exposed over many years to freezing
and thawing cycles, describe why concrete may be
damaged and how to reduce this damage? Is there a
similarity between damage mechanisms as a result of
casting under low temperatures and that from freezing
and thawing?
6) What are the threshold values for moisture content and
percentage of saturated pores to cause damage by
freezing and thawing? (Hint: Dry concrete will never be
damaged by freezing and thawing).

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1 Solution:-

VIEW

Step 2 Solution:-

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

The strength of a fully matured concrete sample is 500 kg/cm². When cured at an average temperature of 20°C in day, 10°C in night, datum temperature To is -11°C. If Plowman constants A is 32 and B is 54, the strength of identical concrete at 7 days will be nearly (a) 333 kg/cm² (c) 272 kg/cm² (b) 312 kg/cm² (d) 243 kg/cm²
A) as follows 1- The reason for the decrease in concrete resistance when the temperature rises? 2- Reasons for preferring ready-mixed concrete over other types of concrete? 3- Why is it not preferred to mix concrete for a period of time more than required? 4- Why is bonding between cement and aggregate paste more important in highly resistant concrete? 5- Why is it important to get rid of the isolation phenomenon in soft concrete? B) between by drawing the following situations? 1. The relationship between checking the compaction factor and checking precipitation 2- The relationship between compressive strength and life of concrete containing fly ash in days
Same concrete mix is cast at two locations, A and B. 1 hour after mixing, the slump loss at A is 5 cm, and the slump loss at B is 10 cm. Could you briefly comment on the weather conditions at locations A and B?
As follows: 1- The reason for the decrease in concrete resistance when the temperature rises? 2- Reasons for preferring ready-mixed concrete over other types of concrete? 3- Why is it not preferred to mix concrete for a period of time more than required? 4- Why is adhesion between cement and aggregate paste more important in highly resistant concrete 5- Why is it important to get rid of the isolation phenomenon in soft concrete?
a) Calculate the temperature of aggregates to produce fresh concrete having the sametemperature with the ambient temperature. Following data in Table 1 could be used:
In compressive strength testing of concrete, which type of concrete will give a more accurate result. 100mm by 100mm cubed concrete or 100mm cylinder concrete. Why?
Calculate the maturity index of a concrete mixture of which datum temperature is -2.5 °C, when it is cured at laboratory for 28 days at 23 °C. O a. 714 °C-day O b. 575 °C-day O C. 644 °C-day O d. 700 °C-day O e. 1344 °C-day
The design engineer specifies a concrete strength of 3700 psi. A plant where s = 300 psi for 41 test results. Which is the required average compressive strength to be used in your mix design? a. 3900 psi; b) 4000 psi; c)4 100 psi; d) 4200 psi
A project specifies a concrete strength of at least 3000 psi. Materials engineers will design the mix for a strength higher than that. Calculate the required average compressive strength of the mix design if the standard deviation is s = 350 psi. Estimate the modulus of elasticity of the concrete at the required average compressive strength (the calculated strength, not the given strength).
1. What are the most common applications for structural steel?2. What is the purpose of reinforcing steel in concrete? Discuss the qualities of reinforcing steel in general.3. Discuss briefly four kinds of heat treatment used to improve the characteristics of steel. What are the benefits of each kind of treatment?
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?
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