Pozzolan
A pozzolan is a siliceous or siliceous and aluminous material which, in itself, possesses little or no cementitious value but which will, in finely divided form and in the presence of water, react chemically with calcium hydroxide at ordinary temperature to form compounds possessing cementitious properties. The broad definition of a pozzolan imparts no bearing on the origin of the material, only on its capability of reacting with calcium hydroxide and water. A quantification of this capability is comprised in the term pozzolanic activity.Pozzolana are naturally-occurring pozzolans of volcanic origin.
History
Mixtures of calcined lime and finely ground reactive (alumino-)silicate materials were pioneered and developed as inorganic binders in the Antique world. Architectural remains of the Minoan civilization on Crete have shown evidence of the combined use of slaked lime and additions of finely ground potsherds for waterproof renderings in baths, cisterns and aqueducts. Evidence of the deliberate use of volcanic materials such as volcanic ashes or tuffs by the ancient Greeks dates back to at least 500–400 BC, as uncovered at the ancient city of Kameiros, Rhodes. In subsequent centuries the practice spread to the mainland and was eventually adopted and further developed by the Romans. The Romans used volcanic pumices and tuffs found in neighbouring territories, the most famous ones found in Pozzuoli (Naples), hence the name pozzolan, and in Segni (Latium). Preference was given to natural pozzolan sources such as German trass, but crushed ceramic waste was frequently used when natural deposits were not locally available. The exceptional lifetime and preservation conditions of some of the most famous Roman buildings such as the Pantheon or the Pont du Gard constructed using pozzolan-lime mortars and concrete testify to both the excellent workmanship reached by Roman engineers and to the durable properties of the utilized binders.
Podcasts:
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by Chris Brown
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by Herman's Hermits
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by Bleach
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by Danger Radio
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by Danny Brown
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by Quarashi
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by Reverend & The Makers
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by Tactical Sekt
Bassline
by: Chris Brown[Verse 1]
Wheels on the Bugatti go 'round-'round-'round
Tappahannock in V.A., yep, that's my town-town-town
If you wanna, we can do this, girl, right now-now-now
You're a model? I got bottles, pour it down (lights)
[Pre-Hook]
Ay girl, tell me what you're taught
Pretty motherfucker, I'mma put you on the wall
Ay, girl, you can get it all
Cause I know you like the way my beat go
Ay girl, tell me what you're taught
Pretty as a, pretty as a picture on the wall
Ay, girl, you can get it all
Cause I know you like the way my beat go
[Hook]
(Bassline)
Girls like my (Bassline)
Girls like my (Bassline)
(Baseline)
Shake it to my (Bassline)
Gonna make it to my (Bassline)
Get butt naked to my (Bassline)
Said them girls like (Bassline)
Girls like my (Bassline)
Girl, you know you like my (Bassline)
(Bassline)
Shake it to my (Bassline)
Gonna shake it to my (Bassline)
Get butt naked to my (Bassline)
[Verse 2]
I-I-I-I'm winning, you heard about my image
But I could give a flying motherfuck who's offended
? baby, if I go any harder
I'm get you out your?, but you're somebody's daughter
But I just wanna know you wanna get it the way that I do
And if you with it, just bring your friends, cause they're loving the crew
I like your piercings, your attitude, girl, and all your tattoos
So come get it with it, leave with me and take this key to my room
[Pre-Hook & Hook]
[Verse 3]
Yeah, I'm getting money, I'mma name my price
Thousand bottles, on these models; nigga, this ain't your night
? got a nigga chillin', how the bitch feel with ice
My bassline to her waistline, a nigga 'bout to bust them pipes
I'm wildin', money piling, two dime twins when their thighs bend
? Bruce Lee want to throw the towel in
Man, life is just so glorious, you could never worry us
You niggas just be playin'? gravy? notorious
I said them girls in the front, bet that Breezy make 'em jump
Over here got that loud, over there they got this bump
Boy, we do this every night, you got to save up for a month
And you just say I'm blowing smoke, but nigga, I'm just being blunt