Precast Concrete

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Precast Concrete

description

The earliest materials for construction was either stone or plaster, and most modern material in our opinion is precast concrete.

Transcript of Precast Concrete

Page 1: Precast Concrete

Precast Concrete

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The  earliest  materials  for  construc1on  was  either  stone  or  plaster,  and  most  modern  material  in  our  opinion  is  precast  concrete.

While  concrete  may  appear  unfinished,  it  can  be  finely  finished  and  make  most  beau1ful  buildings  in  the  world.    

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The  tallest  building  that  uses  precast  concrete  is  the  Transamerica  Pyramid  in  the  San  Francisco  skyline,  stands  at  850  C.  (260  m.).  

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Another  example  is  Park  Tower  in  Chicago  which  rises  844  C.  (257  m.),  it  is  the  second  tallest  building  in  the  U.S.,  to  be  clad  in  precast  concrete.

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Concrete  is  essen1ally  a  combina1on  of  stone  chips,  gravel,  sand,  water,  various  admixtures  and  cement.    When  water  is  added  to  cement,  it  causes  a  chemical  reac1on  that  binds  various  other  components  of  concrete  together,  and  makes  the  product  stronger  than  stone.  

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Concrete  is  weak  in  tension  hence  its  ability  to  crack.  You  can  reinforce  concrete  with  steel  and  let  the  steel  take  the  tension.  The  end  result  is  that  you  acquire  stronger  and  versa1le  building  material.  

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Precast  concrete  is  used  to  save  1me,  and  there  is  no  need  to  wait  for  lower  floors  of  a  structure,  to  cure  before  adding  on  higher  levels.  Panels  can  be  cast  ahead  of  1me  and  then  added  when  needed.  

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Precas1ng  concrete  are  produced  in  factory  under  controlled  condi1ons  such  as  temperature  and  humidity,  because  it  can  have  a  huge  impact  on  concrete  curing  and  strength  of  the  panels.

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Intricate  designs  can  be  cast  into  precast  panels,  and  various  finish  like  stone  or  others  can  be  added  to  the  precast  panels.  While  precast  concrete  oCen  serves  a  very  func1onal  infrastructure,  it  makes  modern  comforts  possible,  adds  beauty  to  func1on,  and  durability  to  our  environment.

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Credits:Images  in  Slides  2,5,6,7,8  taken  from  www.freedigitalphotos.net

Special  Credits  to  the  Photo  Ar2sts:  

Peter  Oresved

Exsodus

Xedos4

Vichaya  Kiatying-­‐Angsulee

Potowizard

Olovedog

Foto76

Njaj.

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