18 - Which of the following may be due to the effects of set retardants. A) All B) Pouring concrete in hot weather C) To be able to produce mass concrete D) To reduce the loss of workability E) To prevent the formation of cold joints

Q: What may happen if the temperature of a concrete mix exceeds 100°F (38°C)?

A: Effect of temperature on concrete mix:

Q: How we Innovative techniques in repair and strengthening of concrete structures. (FRP Wrapping)

A: The process of repairing concrete is very difficult. Deterioration is brought on by a wide range of…

Q: choose the correct option please Silica fume admixture increase concrete strength up to  60 MPa  120…

A: This question is related to Concrete technology from Civil Engineering. In this question ask about…

Q: Link the phrases listed in the raws with a suitable title from the columns below Corrosion of…

A:

Q: The state at which bound water in wood is at maximum known as O a. hysteresis O b. EMC O C. O d. MC…

A:

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: (a) One of the advantages of concrete is its high strength to weight ratio compared to other…

A: Note: Hi! Thank you for the question, As per the honour code, we are allowed to answer three…

Q: The entrance canopy of a building, 2.50m x 6m in dimension, is to be design as a slab. It will carry…

A:

Q: o Why the tensilę strengths of concrete are of the order of 10 and 15%of the compressive'strength.

A:

Q: Practical Part Q.1) Answer any THREE of the following question. 1- What is the objective of standard…

A: NOTE:- There are multiple questions asked, please send one question at a time.

Q: Q1A- the process of hardening the concrete mixes by keeping its surface moist for a certain period…

A:

Q: This is a type of admixture that is used to slow the rate of concrete hardening

A: The water reducer reduces the amount of water content of the concrete mix. The retarder increase the…

Q: Give FOUR factors affecting the durability of concrete (C2) (CO1:PO1).

A: The ability of concrete to resist chemical attack, abrasion, and weathering action is called as…

Q: Design a concrete mix for the following conditions and constraints using the absolute volume method…

A: ACI MIX DESIGN METHOD: Fck=25.1 Mpa S=2.8 MPa Fm=25.1+1.64(2.8) Fm=29.692 Mpa Selecting the  W/C…

Q: Contraction joints: ON All of the above O B) Allow the concrete to move both horizontally and…

A: The contraction joint: A contraction joint is a weakened vertical plane created by a sawed, formed,…

Q: What are the two main reasons that steel corrodes inside reinforced concrete? ingress of chlorides…

A: Two major factors which cause corrosion of rebars in concrete structures are carbonation and ingress…

Q: From the knowledge of the effects of GGBS, PFA and microsilica, indicate whether their inclusion to…

A: Required to find: How the presence of GGBS, PFA and microsilica effect the  a) Alkali silica…

Q: Which of the following cements is cement with at least 50% slag density and is suitable for use in…

A: The cement is a main substance in concreting which is used as a binding material and helps to…

Q: Reinforcing steel inside concrete is protected by the passive layer that forms due to the high pH…

A: Answer:- Mechanism: 1. Ingress of chlorides deicing chemicals: The corrosion of steel reinforcement…

Q: The degradation of wood due to cyclic loading is referred to as

A:

Q: Choose one common mineral that is used in cement and explain how this affects the performance of…

A: one common mineral that is used in cement is lime.

Q: Organic impurities into the aggregate increase the strength and durability of concrete. Select one:…

A:

Q: Q1) What is retrofitting of concrete structures? (CO2-PO2, C1)

A: Retrofitting is strengthening the building , either for dilapidated building or deteriorated…

Q: 13. CPVC fittings should be cement a. Reamed b. Primed c. Sanded d. Bevelled 14. What does PVC stand…

A: Answer :  Question no 13 Correct Option b= Primed CPVC fittings should be primed before putting on…

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: 24 - Which of the following is the common effect of pozzolan on concrete. A) Decrease in hydration…

A: Given data:  Which of the following is the common effect of pozzolana on concrete.A) Decrease in…

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: 61. The repair and rehabilitation of damaged or spalled concrete is done by removing the A. O Loose…

A: The repair and rehabilitation of damaged or spalled concrete is done by removing the ____ A. Loose…

Q: The black color in bricks results due to alumina O magnesia iron oxide O gravel O O O

A: Alumina does not impart any colour to brick yet, imparts moulding and plasticity.

Q: From the knowledge of the effects of GGBS, PFA and microsilica, indicate whether their inclusion to…

A: Brief concept introduction- GGBS, PFA and microsilica- GGBS (Ground Granulated Blast Slag) is a…

Q: Methods that prevent loss of moisture from concrete by sealing the surface all .a Water proof…

A: Concrete : Concrete is a structural material made up of a hard, chemically inert particle element…

Q: Methods that reduce the loss of mixing water from the surface of the concrete can be done by O…

A: Answer  To reduce the loss of mixing water from the surface of the concrete following methods are…

Q: If a water reducer is added to the concrete mix without changing other ingre-dients, what will…

A: The water reducer in concrete increases the workability of concrete. The workability of concrete is…

Q: If the overall temperature of the concrete exceeds the concrete may flash set. O 120F O 100F O 110F…

A: Ans - 100 F at 100 F setting time is 1-2/3 hours. The setting time of concrete decreases with a rise…

Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.