Bibliografía

https://www.google.com/search?q=imagenes+de+cemento+portland&hl=es&biw=1280&bih=656&source=lnms&tbm=isch&sa=X&ei=xuZfVIGrLIKhgwSgxIKQAw&ved=0CAYQ_AUoAQ#hl=es&tbm=isch&q=proceso+de+elaboracion+del+cemento+portland

http://www.elconstructorcivil.com/2011/01/composicion-quimica-del-cemento.html

http://exposicionestc18.wikispaces.com/file/view/13_CastellanosCastillo_PROPIEDADES+FISICAS.pptx

http://www.cmi.cemolins.es/cm/cmi_nd/swf/anim/esp/portland_01_cantera.htm

http://www.argos.co/colombia/productos/concreto/tipos

http://www.youtube.com/watch?v=kJCAGQ_ZWYs

http://www.youtube.com/watch?v=e38i2nz5f24

http://www.youtube.com/watch?v=vnwSuFgI5PY

http://www.youtube.com/watch?v=F5qKuGpKP7I

http://www.youtube.com/watch?v=kx9B52AOZQ0

http://www.youtube.com/watch?v=pYP-MMD8tt4

https://www.google.com/search?q=clinker&hl=es&biw=1280&bih=656&source=lnms&tbm=isch&sa=X&ei=YOpfVNmEIIqdgwTJ7YLQDQ&ved=0CAYQ_AUoAQ#facrc=_&imgdii=uD3Xn9ALvecDTM%3A%3BaVr-R85g_iGmXM%3BuD3Xn9ALvecDTM%3A&imgrc=uD3Xn9ALvecDTM%253A%3B0B38NHDOJCB5xM%3Bhttp%253A%252F%252Fwww.bombayharbor.com%252FproductImage%252FClinker%252FClinker.jpg%3Bhttp%253A%252F%252Fwww.bombayharbor.com%252FProduct%252F5845%252FClinker.html%3B383%3B331

https://www.google.com/search?

q=clinker&hl=es&biw=1280&bih=656&source=lnms&tbm=isch&sa=X&ei=YOpfVNmEIIqdgwTJ7YLQDQ&ved=0CAYQ_AUoAQ#hl=es&tbm=isch&q=CALIZA&imgdii=_

https://www.google.com/search?q=clinker&hl=es&biw=1280&bih=656&source=lnms&tbm=isch&sa=X&ei=YOpfVNmEIIqdgwTJ7YLQDQ&ved=0CAYQ_AUoAQ#hl=es&tbm=isch&q=arcilla&revid=431118013&imgdii=_

https://www.google.com/search?q=clinker&hl=es&biw=1280&bih=656&source=lnms&tbm=isch&sa=X&ei=YOpfVNmEIIqdgwTJ7YLQDQ&ved=0CAYQ_AUoAQ#hl=es&tbm=isch&q=CAL&facrc=_&imgdii=_&imgrc=9kvZu6B1OlW00M%253A%3BVfsbtKrB26w-IM%3Bhttp%253A%252F%252Fwww.sibelcosam.com%252Fwp-content%252Fuploads%252F2012%252F08%252Fcal-calcario04.jpg%3Bhttp%253A%252F%252Fwww.sibelcosam.com%252Fes%252Fproductos-y-aplicaciones%252Fcal-y-calcareo%252F%3B613%3B315

https://www.google.com/search?q=clinker&hl=es&biw=1280&bih=656&source=lnms&tbm=isch&sa=X&ei=YOpfVNmEIIqdgwTJ7YLQDQ&ved=0CAYQ_AUoAQ#hl=es&tbm=isch&q=cemento+portland&imgdii=_

https://prezi.com/iebujgs8slvf/impacto-medioambiental-en-la-fabricacion-de-cemento-portland/

http://apuntesingenierocivil.blogspot.com/2010/10/tipos-de-cemento-portland.html

http://sumaconcausa.org/index.php/component/k2/item/302-cemento-datos-de-impacto-ambiental-social-y-en-la-salud