Arnold Shelton

397

Management consultant

Hi,

Initial Setting Time is regarded as the time elapsed between the moment that the water is added to the cement to the time that the paste starts losing its plasticity.

In actual construction dealing with cement paste, mortar, or... (More)

Sugar is mainly famous as retardant of concrete and thus is often used to help adjust the setting times, especially in emergencies. Retardants are used to slow down the setting of concrete, mainly in warm weather, to make it more... (More)

Standard dimensions of a ventilator in Residential Building:

Ventilator moves outdoor air into a building or a room and allows to exit indoor air outside the room.

Bathroom = 5 feet x 8 feet , a CFM rating of 40... (More)

Differential settlement in foundation:

Usually, due to poor compaction, lower bearing capacity of the soil, high depth of hard strata, various changes in water content in soil are the basic reason behind the differential settlement of soil.

Apart from that,... (More)

Hi, sunlight is the best source of light and energy. So to use effectively, the placing of windows and other openings and reflective surfaces matters a lot.

As a civil engineer, it’s our aim to maximize the comfort of the... (More)

The seasoning of bricks is exactly expressed as allowing the brick to absorb water. It is also known as weathering of bricks. The moisture obtained by the bricks should be able to react with the chemical in the brick. If... (More)

Fire clay bricks

Fire bricks or fire clay bricks are made from the fire clay. The process of manufacturing of these bricks is same as the ordinary bricks but are burnt at very high temperatures in a special type of... (More)

Significance of Fineness of Cement:

1. As we know that the Bleeding phenomena reduce by increasing the fineness of the cement because of an increase in the surface area & adsorb water content.
2. An increase in fineness, an increase in hydration... (More)

The pile has uniform diameter throughout its length and made from corrugated steel called Mac Arthur pile.

It is used in place of the Raymond pile.

Procedure:

1)Heavy steel casing with the dense core is driven into the ground.

2)After... (More)

You should use PSC cement as this type of cement has various speciality than ordinary cement. PSC is the portland slag cement and it is also a type of supplementary cementatious material but it works on hydraulic activy. The material... (More)

Crazing Cracks are cracks on the surface in a hexagonal pattern. It occurs due to shrinkage, not enough curing, acidic water used, and weathering actions.

Measures taken to avoid crazing Cracks:

1)Do sufficient curing during construction.

2)Use sand with 75... (More)

If slump results from test show shear or collapsible slump, then it should be rejected, and the test should be repeated. Now, if at site RMC is used and slump results are not satisfactory, then we can manage the water-cement... (More)

Beams in which the steel reinforcement is placed in the tension as well as compression zone are called as doubly reinforced beams. The moment of resistance of a balanced R.C.C. beam of dimension b×d is Rbd2. Sometimes due to head... (More)

After unloading, creep recovery takes place, but it is partial, because of aging. In practice, creep during drying is inseparable from shrinkage. The difference called the drying creep or Pickett effect (or stress-induced shrinkage) represents a hygro-mechanical coupling between strain... (More)

When the interviewer asks us about “Tell me about yourself,” I always recommend you to answer in past-present-future formula.

The past – describe your work background and tell about what work you are done in the past and what major... (More)

Calculation of the surface area of the rebar-

Considering the dia of rebar as 16mm and length as 1m.

Surface area= Length x Circumference of the bar (Considering bar having smooth surface)

= 1 x 2 π r

= 1... (More)

In simple words, base flow is the flow of water under the ground between the precipitation and percolation. If the precipitation and percolation act on base flow it is called a negative base flow. In this case, the base flow... (More)

Concrete will be subjected to following test a at site:

1. Slump test
2. Temperature test
3. Cube casting and strength checking at 7 and 28 days test
4. Durability tests ..namely..absorption test, chloride and sulphate contents tests, water permeability test.

For repairing Honeycomb in Concrete you have follow below procedure:-

1. Remove all loose aggregate and concrete particles with the help of wire brush.

2. Now clean the surface finer and remove all particles.

3. Let the surface dry and... (More)

Hi Justin R.

I am researcher in field of Nanotechnology, so I am a eligible person for answering your question.

The photocatalytic activity is tested in air purification after NOx removal. Also the self cleaning properties are tested during dye... (More)