workability of concrete can be improved by zinc
workability of concrete can be improved by zinc
Zhengzhou, Henan China
24 hours At your service

workability of concrete can be improved by zinc

  • Home
  • / Product
  • / workability of concrete can be improved by zinc

Concrete Technology Aptitude Test - Sanfoundry

Dec 19, 2017  Workability of concrete can be improved by the addition of _____ a) Iron b) Sodium c) Zinc d) Sulphur View Answer. Answer: c Explanation: Inorganic retardants include oxides of lead, zinc, phosphate and magnesium salts. Most retarders also act as water reducers. 3. Workability of concrete can be improved

More

Workability of concrete can be improved by addition

Que. Workability of concrete can be improved by addition : A. Iron B. Sodium C. Zinc D. Sulphur Right Answer is : C. Zinc

More

1.Workability of concrete... - Civil Engineering Mcq ...

1.Workability of concrete can be improved by the addition of _____ a) Iron b) Sodium c) Zinc d) Sulphur. Answer: c Explanation: Inorganic retardants include oxides of lead, zinc, phosphate and magnesium salts.

More

250+ TOP MCQs on Workability of Fresh Concrete and Answers

2. Workability of concrete can be improved by the addition of _____ a) Iron b) Sodium c) Zinc d) Sulphur Answer: c Clarification: Inorganic retardants include oxides of lead, zinc, phosphate and magnesium salts. Most retarders also act as water reducers. 3. Workability of concrete can be improved by _____ a) More sand b) More cement

More

Effect of Zinc Oxide Nanoparticle on Properties of Concrete

particles added cement composite can increase the workability, strength and durability characteristics. 1.1 Concrete with nano particles Nano particles can also improve the bond between the aggregates and cement paste. Studies on cement paste with Nano materials are absolutely necessary to understand the influence of Nano materials.

More

Concrete - The workability of concrete can be improved by ...

Aug 31, 2018  The workability of concrete can be improved by - (a) More sand (b) More cement (c) More fine aggregate (d) Fineness of coarse aggregate. The correct Answer Is (b) More cement . Reactions: Alamqc1220, Kumar godlaveeti, Rahullnt and 3 others. ghhgc Newbie. G into. Mar 22, 2018 #2 B . ghhgc Newbie. G into.

More

The workability of cement concrete can be

The workability of cement concrete can be improved by. [A]. increasing the quantity of cement. [B]. increasing the proportion of coarse aggregate. [C]. increasing the quantity of sand. [D]. all of the above.

More

The workability of cement concrete can be

The workability of cement concrete can be improved by. [A]. increasing the quantity of cement. [B]. increasing the proportion of coarse aggregate. [C]. increasing the quantity of sand. [D]. all of the above.

More

Concrete - The workability of concrete can be improved by ...

Aug 31, 2018  The workability of concrete can be improved by - (a) More sand (b) More cement (c) More fine aggregate (d) Fineness of coarse aggregate. The correct Answer Is (b) More cement . Reactions: Alamqc1220, Kumar godlaveeti, Rahullnt and 3 others. ghhgc Newbie. G into. Mar 22, 2018 #2 B . ghhgc Newbie. G into.

More

Effect of Zinc Oxide Nanoparticle on Properties of Concrete

particles added cement composite can increase the workability, strength and durability characteristics. 1.1 Concrete with nano particles Nano particles can also improve the bond between the aggregates and cement paste. Studies on cement paste with Nano materials are absolutely necessary to understand the influence of Nano materials.

More

Utilization of ecofriendly self-cleaning concrete using ...

Jul 16, 2020  The compressive strength is slightly increasing up to 7% of zinc oxide and 0.5% of polypropylene fiber. The fiber helps to increases the strength of the concrete and reduce the workability. Zinc oxide act as photocatalyst and creates the self-cleaning ability of the concrete. Zinc oxide binds with cement paste thoroughly and produce absorbent ...

More

1.Workability of... - Civil Engineer-নির্মাণ প্রকৌশলী ...

1.Workability of concrete can be improved by the addition of _____ a) Iron b) Sodium c) Zinc d) Sulphur. Answer: c Explanation: Inorganic retardants include oxides of lead, zinc, phosphate and magnesium salts.

More

Workability of Concrete - Types and Effects on Concrete ...

The workability of concrete can be enhanced by use of rounded aggregates and by the use of workability enhancing admixtures. With the use of admixture such as air-entraining admixtures, the workability in increased without increase in water-cement ratio. This helps in attaining required strength and workability for concrete work.

More

How can the workability of concrete be increased? - Quora

Bigger size of aggregates have following advantages as compared to smaller - * It has less surface area * Require less amount of water for wetting surface * Require less amount of cement paste to lubricate the surface So ofcourse bigger size will ...

More

Concrete Retarders: It’s Uses, Mechanism Pros-Cons

Jul 29, 2019  With the use of concrete retarders, you can compensate the accelerating effect of high temperature towards the initial setting time and minimize risks of long-distance delivery in hot weather. Use of retarding admixtures improves pumpability of concrete by delayed setting period and improved workability of concrete.

More

Utilization of tailings in cement and concrete: A review

Generally, tailings used as partial aggregate or cement replacement has an adverse effect on the workability of fresh concrete and mortar due to the increase in the total specific area [26, 38, 62]. However, by eliminating the finer sizes of tailings as a cement replacement, the adverse effect on workability can be reduced .

More

WHAT ARE THE FACTORS AFFECTING WORKABILITY OF CONCRETE ...

Apr 04, 2014  Factors Affecting Workability of Concrete A concrete is said to be workable if it is easily transported, placed, compacted and finished without any segregation. Workability is a property of freshly mixed concrete, and a concrete is a mixture of cement, aggregate, water admixture. Due to this all the properties of concrete, whether in fresh []

More

globalscientificjournal EFFECT OF CHEMICALLY ...

ment of cement with nanoparticles of titanium dioxide the workability of fresh concrete was decreased but this can be avoided by the use of superplasticizers (Nazari, et al., 2010). Recent researches suggest that by adding ZnO the durability and strength of concrete can be improved (Singh Tiwari, 2017). Zinc

More

Effect of Usage of Admixture in Concrete

The use of admixtures offers certain beneficial effects to concrete like improved workability, acceleration or retardation of setting time, reduce water cement ratio, and so on. There are two basic types of admixtures available: chemical mineral. Admixtures like flyash, silicate fume, slag comes in the category of mineral admixtures.

More

19 Types of Admixture used in cement concrete - Civil crews

(c) If the concrete is harsh because of poor aggregate characteristics or grading. (d) For making high strength concrete when w/c ratio is very low. In the above circumstances even the cost of achieving the workability may have to be overlooked. Some admixtures can be used to improve workability. The materials used as workabilíty agents are –

More

Types Of Concrete Used In Construction Work [25 types]

The performance of the concrete can be improved by making the three phases on the concrete – the paste phase, transition phase, and aggregate phase stronger. It can be done by increasing the cement content, restricting the water-cement ratio to not more than 0.3, using super plasticizers, mineral admixtures, and non-porous aggregates.

More

Synthesis of Zinc Oxide Nanoparticles and Their Effect on ...

volumes of concrete can be decreased and the most probable pore diameters of concretes shift to smaller pores and fall in the range of less-harmful pores or even harmless pores, which indicates that the addition of ZnO nanoparticles improve the structure of concrete. Table 1.

More

What is Workability of Concrete? - Gilson Co.

Workability of Concrete is a broad and subjective term describing how easily freshly mixed concrete can be mixed, placed, consolidated, and finished with minimal loss of homogeneity. Workability is a property that directly impacts strength, quality, appearance, and even the cost of labor for placement and finishing operations.

More

WORKABILITY AND STRENGTH CHARACTERISTICS OF

water cement ratio workability can be improved and increase in the strength can be seen. EXPERIMENTAL PROGRAM In the present investigation for M60 grade concrete mix proportion is obtained as per IS 10262: 2009 method. Several trial mixes are conducted without adding super plasticizers and it is noticed that mixes are stiff with poor workability.

More

Workability of Concrete Factors Affecting Workability of ...

Feb 10, 2017  Workability is one of the physical parameters of concrete which affects the strength and durability as well as the cost of labor and appearance of the finished product. Concrete is said to be workable when it is easily placed and compacted homogeneously i.e without bleeding or Segregation. Unworkable concrete needs more work or effort to be compacted in place, also

More

High workability concrete

High workability concrete. The workability of fresh concrete should be suitable for each specific application to ensure that the operations of handling, placing and compaction can be undertaken efficiently. BS EN 206 and BS 8500 (the European and UK standards for concrete) give guidance on workability for different uses.

More

The workability of concrete... - Civil Engineering ...

The workability of concrete can be improved by the addition of the following compounds a) Iron b) Sodium c) Zinc d) Sulphur

More

All about Workability of Concrete - Structural Guide

Admixtures. There are different types of concrete admixtures and the purpose of using them is also varied.. There are admixtures to improve the workability of concrete without adding water to concrete. It is a greater advantage as if we have good workability with less content of water, there is a possibility of increasing the strength of the concrete.

More

Workability of Concrete - Tests Factors Affecting ...

Workability of concrete is defined as the ease and homogeneity with which a freshly mixed concrete or mortar can be mixed, placed, compacted and finished. Strictly, it is the amount of useful internal work necessary to produce 100% compaction.

More

Which admixture is added to concrete to improve ...

Both are designed to give more time although in practice the superplasticisers make the concrete very gluey, elasticated which makes it very difficult to work with. In principle they will keep the concrete from going off for longer..but be aware ...

More

Utilization of tailings in cement and concrete: A review

Generally, tailings used as partial aggregate or cement replacement has an adverse effect on the workability of fresh concrete and mortar due to the increase in the total specific area [26, 38, 62]. However, by eliminating the finer sizes of tailings as a cement replacement, the adverse effect on workability can be reduced .

More

Properties of Concrete - Workability, Setting, Bleeding ...

Mar 19, 2017  2. Workability of Concrete. Workability is often referred to as the ease with which a concrete can be transported, placed and consolidated without excessive bleeding or segregation. OR. The internal work done required to overcome the frictional forces between concrete ingredients for

More

Embedded metals other than reinforcing steel

Corrosion inhibitors, such as calcium nitrite, have been shown to improve the corrosion resistance of aluminum in concrete. Lead: Lead in damp concrete will be attacked by the CaOH 2 in the concrete, and may be destroyed in a few years. Contact of lead with reinforcing steel can accelerate the attack.

More

Effect of Water Impurities on Concrete Strength ...

Before the use of water in concrete, the muddy water should undergo settlement in the basin. Effect of Miscellaneous Inorganic Salts in Water on Properties of Concrete The salt content in water adversely affect the strength of the concrete. The major salts that can be present in water are salts of manganese, tin, lead, copper and zinc.

More

Concrete Admixtures 7 Types Of Concrete Admixtures ...

15. To strengthen the bond between new and old concrete surfaces. Types of Concrete Admixtures There are 7 types of concrete admixtures that are commonly used: a. Air- entraining agents: The main objects of entraining air in concrete are: i. To increase the workability and. ii. To improve its resistance to weathering and especially to action of ...

More