๐Ÿ How to protect the building from chemical and environmental attack?๐Ÿ—

 Welcome back friends, 

          If one question is blinking in your mind that is "Even after great technologies and experts are available Special care is being taken during construction activity then "why the structures get deteriorate?"

        If this question is blinking in your mind then you are on the right way of thinking as an  engineer and quality construction seeker.

       Most of the structural elements in the  vorious type of Construction activity loose their Strength due to environmental & chemical and environmental factors. In Simple word "Chemical and environmental attacks". 

Now you will ask How'?

         We all know that due to Industrialization various industries produces  huge amount of waste in the Gas, liquid and Solid form. This waste directly and  indirectly present in our environment and here the actual Chemical & environmental attack Starts.

         So many process are involved in the process of chemical attack but I will explain here basic concept of chemical attack that is crystalization.

         Chemicals like sulfate present in environment enter into concrete from pores or voids present in the surface of concrete and this chemical entrapped into internal voids .

         As the time passes this entrapped chemical starts preparing Crystal and this Crystal then develop pressure internally on concrete. As a result we see the cracks on the concrete and this process not happen only in concrete but also in various construction materials by the means of various chemicals and by various ways.

        In advance construction practice construction professionals use various surface treatment like chemical coating on surface of building elements to avoid this future unseen Risk of cracking in the structure.

      As a effective solution of this Chemical and environmental attack. We will discuss here about  Solvent based Coal epoxy Coating system.

It is popularly known as AC-DUR-CT ('s) 

It is two Component Solvent based Coal tar epoxy system. 

For details about this company ๐Ÿ‘‡๐Ÿ‘‡

http://www.Applechemie.com

It is Specially designed Coating having judicious blend of high quality. resin and inert fillers. It is recomended for protection of interior & exterior wooden, Concrete and metal surfaces from environmental and chemical attactk.

A detailed discussion we will do in 2nd part of this blog in which you will get all the details of this epoxy coating system and AC-DUR-CT (S).

Keywords # civil engineering# environment# chemical # attack# science # building # Protection # quality construction #

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MCQ in๐ŸŒ๐ŸŒ‹ Earthquake engineering ๐ŸŒ‹Part 1

 Welcome back friends, Part 1

             As we all know that all the building structures are rest on Earth. For the safety and stability of the structure we need to have some knowledge about Earth and seismology. 

               Because of that I am here giving mcq questions and answers related to Earth science and seismograph. ๐Ÿ‘‡๐Ÿ‘‡๐Ÿ‘‡

1.Which of the following is not categorised under geologic hazard?

(A) Tropical cyclone

(B) Earthquakes

(C) Volcano

(D) Floods

2. Which one is the 2nd large magnitude earthquake occurred during past 100 yrs?

(A) 2001, Bhuj earthquake

(B) 2004, Sumatra earthquake

(C) 2015, Nepal earthquake

(D) 2005, Kashmir earthquake

3. New Zealand is an example of

(A) Convergent plate boundary 

(B) Divergent plate boundary

(C) Conservative plate boundary

(D) Both convergent and conservative plate boundaries 

4. Which one of the following is a secondary phenomenon during an earthquake?

(A) Fault scarp

(B) Terrace offset

(C) Liquefaction

(D) All of these

5. Which of the following is not categorised under the Himalayan earthquake?

(A) Uttarkashi Earthquake 

(B) Kangra Earthquake 

(C) Gorkha Earthquake 

(D) Bhuj Earthquake 



6. Along which active fault the Trans-Alaska pipeline was survived during an earthquake?

(A) Denali fault

(B) Himalayan frontal thrust

(C) Alpine fault

(D) None of these

7. In which tectonic environment, you can find the surface expression in the form of folding?

(A) Extensional

(B) Compressional

(C) Strike slip 

(D) All of these

8. In which type of the fault the hanging wall is moving up with respect to foot wall?

(A) Normal fault

(B) Strike slip fault

(C) Reverse fault 

(D) None of these

9. _______ is the angle of a fault plane w.r.t. vertical.

(A) Hade

(B) Throw

(C) Heave

(D) Dip

10. Surface along which the block of rock slip is called _____?

(A) Fault zone

(B) Fault Plane

(C) Fault scarp

(D) None of these


11. Now India is divided into ____________ seismic zones.

(A) 5

(B) 3

(C) 6

(D) 4

12. The San Andreas Fault is an example of:

(A) Normal fault

(B) Reverse fault

(C) Right lateral strike slip 

(D) Left lateral strike slip 

13. Point on fault plane where slip initiated is termed as:

(A) Epicenter

(B) Hypocenter

(C) Fault scarp

(D) Hanging wall

14. 1995 Kobe earthquake was occurred in ________.

(A) Japan

(B) United States of America

(C) Taiwan 

(D) India

15. 2005 Muzaffarabad earthquake was occurred on _______ active fault.

(A) Kangra Active fault 

(B) San Andreas fault 

(C) Main Boundary thrust 

(D) Tanda Active fault

16. Sag pond is an example of :

(A) Normal fault

(B) Reverse fault

(C) Strike slip fault

(D) None of these

17. Which type of movement has been seen in right lateral strike-slip fault?

(A) Sinistral movement

(B) Dextral movement 

(C) Upward movement

(D) None of these

18. The displaced aqueduct of Al Harif is in between ________ and _________ plates.

(A) African plate and Arabian plate

(B) Indian plate and Eurasian plate

(C) African plate and Pacific plate

(D) None of these

19. The beds which have a gentle upstream dip will be_______ to the resultant force (R), hence can provides the best resistance to withstand the stresses or loads acting in the area.

(A) Parallel

(B) Perpendicular 

(C) None of these 

20. Taksal fault is an example of:

(A) Normal fault

(B) Reverse fault

(C) Strike slip fault

(D) None of these

To read the Part 2 of this blog ๐Ÿ‘‡๐Ÿ‘‡๐Ÿ‘‡

Link is in comment section 

Source of information - NPTEL 

Keywords# civil engineering # seismology # earth # earthquake # fault # science




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