The Origin process of, and its ecological impact ( Phase I )What building in this time which do not use cement? In this time most of all building use cement as its glue. Don't know that building University, bridge, tower, mall, and the house which we inhabit in this time, altogether surely use cement. Cement very required in all the world, especially for take careing the contractor and construction which the medium earn the project make building. If us as chemical enginer can make factory cement of course will own prospect making a promise
But how of is way of making the cement? caw Tau? Caw need to worry cause in this article will be studied to hit origin cement, process of its, as well as its impact to environment, so correct reading non-stoped by yach.
THE ORIGIN OF CEMENT
In human being civilization growth, specially in the case of building, frequent to of course hear story of about ancestors ability gum giant stones till can become building which fenomenal, Foe example The Temple of Borobudur and The Temple of Prambanan. It is said according to their legend only use soft rice as glue. Even, there is also which spell out members their if only use protein.
Real correct or do not, mentioned legend story show recognizing of function cement since former epoch. Before like now, this building lasing and glue initially representing result of limestone mixing and dusty of vulkanis. This glue, is first time found in Monarchic epoch of Romawi, precisely in Pozzuoli, near by bay Napoli, Italian. That Powder is then named by pozzuolana. While word cement by xself come from caementum ( Latin Ianguage), what its meaning about " cutting to become the parts of minimizing do not reguler". But, about middle ages ( year 1100 - 1500 M) ingredient pozzuolana recipe have time to disappear at the same time collapsedly is Monarchic of Romawi.
Newly at century of ke-18 John Smeaton ( engineer of English origin) finding to return this capable excrutiatingly ancient ingredient. He make dough exploitedly is mixture of limestone and clay of moment develop; build mercusuar Eddystone in offshore of Cornwall, English
Ironically, non Smeaton which finally patent the process of cikal will cement this. multiply to make patent of about ingredient of glue of building is Joseph Aspdin in the year 1824. That ingredient is he name “ Cement Portland”. Named so because colour of end result of olahannya loo like clay of Island Portland, English. this Result Rekayasa Aspdin now a lot of sold in building shop.
In fact, dough Aspdin do not be different far by Smeaton. He is remain to rely on two especial substance, limestone ( rich of calcium of the carbonate) and the clay land; ground which is a lot of containing silica ( of a kind mineral of is in form of sand), aluminium oxide ( alumina) and also the iron oxide. That substance is later;then attenuated and heated at high temperature formed by a new mixture
During the warm-up process, formed by a solid mixture containing ferrum. So, in order to do not ossify like stone, ingredient given by the gypsum powder and attenuated till the in form of small particle loo like powder
Generally its his, to reach certain strength, cement portland mixed with by a other;dissimilar substance. If meeting water ( and lessened by the other;dissimilar substance), for example, peeping out chemistry reaction which ready to alter ingredient become as hard as stone. If added by a sand, created by a glue brick up sturdy nan. But to make building foundation, mentioned mixture generally still be added with block petrify or gravel, so-called referred as by concrete concrete or. These days, almost nothing;there is no skyscraper building standing unassisted of concrete.
PROCESS OF CEMENT
So, next is we will study how to make cement in factory. Cement which most commonly is Cement Portland. Cement this need four component of especial chemicals that is calcify (limestone), silica ( sand), alumina ( clay) and the iron oxide ( iron seed). A few/little gypsum is generally enhanced at the time of attenuation to slow down ossification
Earliest phase from from making cement is digging/quarrying. Factory cement to do/conduct mining to [be] ready to two type of material which is the necessary for production cement that is substance containing chalk ( calcareous materials), and the material containing silica (argillaceous materials) loamy.
Then at next phase, broken to mentioned material become smaller size measure by using destroyer appliance. mentioned is broken material of melewati of on-line analyzer to determine composition of substance heap. Mentioned composition adapted for by the specification of production. heap of mentioned Substance is then transported by belt conveyor to penampung to be milled mount the desired softness
Mixture of is mingled to by raw material flatten the baited to pre-heater. Pre-Heater represent appliance of penukar of heat consisted of to by with refer to cyclone of where happened by the hot transfer among/between bait of mixture of raw material with hot gas. Its target only as warm-up of early in order to process in next unit (kiln) more efficient ( can reach efficiency 20-40%).
