Primitive Technology: Lime

  • Published on Mar 6, 2018
  • At the old hut site (the new one being temporarily cut off by flooding) I made lime mortar from the shells of rainforest snails by firing them in a kiln, slaking them in water, mixing them into lime putty. Limestone is basically calcium carbonate (CaCO3). The general source of lime is limestone and various other calcareous minerals, though shells, egg shells and coral are other sources of lime (for more information see video on Corporals Corner channel: or Skillcults channel: When heated above 840 degrees Celsius, the lime decomposes into calcium oxide (CaO) or Quicklime and releases carbon dioxide (CO2). When water is added to the quicklime it becomes calcium hydroxide Ca (OH)2 or lime putty. From here the calcium hydroxide can then be shaped into a form and allowed to set. Carbon dioxide enters the lime putty as it dries causing it to turn back into calcium carbonate. The new calcium carbonate has then set, remaining solid and water resistant.
    In my local geography, calcareous rocks such as limestone are absent leading to a difficulty in acquiring the feed stock for lime making. However, I was still able to make lime by collecting the shells of large terrestrial snails that are native to the rainforest here. The unoccupied shells of these snails were gathered up and stored at the hut. Fire wood was gathered and packed neatly into the kiln. Importantly, the firewood was stacked on top of the grate rather than underneath it in the firebox as is the normal procedure for firing pottery. Using an ordinary updraft pottery kiln in this configuration allows it to reach much higher temperatures than would be possible during normal use. The wood was lit from above and the fire burned down towards the grate. Alternate layers of shells and wood were added on to this burning fuel bed. After adding the last layer of wood to act as a “lid” to prevent heat loss from above I left the kiln to finish on its own, unsupervised. The whole process took about an hour and a half.
    When the kiln had cooled down a few hours later, I took out the calcined shells. Not shown in the video was the fact that some shells got so hot, the dirt stuck to them turned into slag and fused to them, possibly with the lime acting a flux lowering its melting point. This extreme heat (+1200 c) should be avoided as the over burnt lime becomes “dead lime”, unable to slake in water. Most shells were still useable though. They were taken out of the kiln and had water added to them. An exothermic reaction then ensued. Heat was produced as the lime quicklime turned into slaked lime. The water heated up creating steam and the shells decomposed into a white paste. The paste was stirred and crushed pottery was added to it as an aggregate (sand is normally used for this, I just had a lot of old pot sherds lying about to dispose of). This lime mortar mixture was then formed into a block shape and left to dry. It took about a week and a half to set as we have had extremely humid, wet weather. The block was observed to have set demonstrating its properties.
    What I created is actually lime mortar, typically used for mortaring bricks and tiles together. It’s basically the ‘Glue’ that holds together the building blocks of masonry structures. From my research 20 kg of lime mortar is used on a 1 m square section of brick wall. 5 kg of lime to 15 kg of aggregate (sand, grog etc.) per a 1 m square section of bricks. The shells, though large, are not terribly abundant. A method for finding shells efficiently needs to be made before considering making lime mortar in this fashion. From my experience sand bars in a creek sometimes accumulate snail shells from higher up in the mountains. In these spots, water velocity decreases and shells in the water tend to drop out of the water column. Additionally lime may be partially replaced with ordinary wood ash in mortar without a corresponding decrease in strength. To conclude, making lime in a land without limestone is possible but can be problematic when trying to do so on a large scale.
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Comments • 13 251

  • Corporals Corner
    Corporals Corner 6 months ago +3783

    Great Video. Check out Mine on Roman Concrete

  • Cary Howe
    Cary Howe Day ago

    Now that's out of the box thinking. I know lots of people making quicklime from oyster shells but using land snail shells is sheer brilliance! You are once again my hero and a god among survivalist teachers. Most make lean tos, this guy would can build a brick house with running water in the middle of the jungle with no more than the clothes on his back. Most are yuppie survivalist, this guy is the real thing.

  • Mindsoftomorrow
    Mindsoftomorrow 4 days ago

    Primitive Technology: rebuilding Timbuktu to scale with mud bricks and vine rope

  • Thất Tình huhu
    Thất Tình huhu 5 days ago

    Dùng cây j để tạo lửa z

  • india atkin
    india atkin 5 days ago

    Celts used a lime/water paste to style their hair/ hold it out of their faces in battle. Try it.

  • Keahi Bailey
    Keahi Bailey 5 days ago

    Anyone who says he hit stone age is plain retarded. This guy is way more advanced than that. He is in the post-apocalypse (if I spelt that right)

  • khủng long TV
    khủng long TV 6 days ago

    Team VietNam

  • R Y
    R Y 6 days ago

    カタツムリ…でかくね( ´;゚;∀;゚;)

  • Barry Mcdickface
    Barry Mcdickface 7 days ago

    Hey primitive technology. Your making me look like a lazy cunt as I can’t be fucked mowing my lawns on my ride on.. so can you tone it down a bit. Ta.

  • Kristofer Mercer
    Kristofer Mercer 8 days ago

    Wow should make that a part of your construction, well if it's hard

  • Deez Nuts
    Deez Nuts 11 days ago

    Is this what Prometheus does in his spare time?

  • Tonrock Allmighty
    Tonrock Allmighty 12 days ago

    Can you imagine a snail creeping up and seeing all those shells he'd be mortified

  • Çağdaş Eroğlu
    Çağdaş Eroğlu 13 days ago

    En sonda ortaya çıkan beyaz taş kütlesi ne işe yarıyor? Yapılış amacı nedir?

  • Hani G7
    Hani G7 14 days ago

    5:52 is that what good pussy sounds like

  • Singleplayer
    Singleplayer 14 days ago

    Looks like paint

  • Nik Lyons
    Nik Lyons 15 days ago

    So the shell are not hot? They are just fired, cooled and put in water? What about white rocks? Can I burn them and do the same to make lime? I saw one vid where rocks were dissolved using vinegar. I have literally so many questions

  • Samuel Kerby
    Samuel Kerby 15 days ago

    Could this be done with chalk?

  • Connor Gosselin
    Connor Gosselin 17 days ago

    What is lime used for tho

  • Олег Дьяченко

    Здесь есть русские субтитры, ничего себе.

  • Nagnullat
    Nagnullat 17 days ago

    Snail pile.

  • Whirligig
    Whirligig 17 days ago

    i prefer lemon

  • Joan Ngumeta
    Joan Ngumeta 18 days ago

    I thought the title said Primitive Technology: Ligma

  • Stagnation
    Stagnation 18 days ago

    I was starting to think he was gonna say he was HowToBasic at the end there.

  • Night Cat
    Night Cat 19 days ago

    1 like = 1 snail lives

  • volvox x
    volvox x 19 days ago

    its Khorasan mortar

  • Toan Huynh
    Toan Huynh 20 days ago

    Cái đó có tác dụng gì vậy you ?

  • Nathan
    Nathan 20 days ago

    00:00 sLiMy BOI

  • Krispy Krep
    Krispy Krep 20 days ago

    Watch as this man discovers electricity in the next 10 years.

  • Mark Doney-Mccloud
    Mark Doney-Mccloud 21 day ago

    Many cultures were known to trade even among "primitive cultures", The movement of the Sea People is such an example. These seafarers traded and exploited items and raw materials for thousands of years from the coasts of modern day Lebanon and Syria to the British Isles and Africa. They possibly crossed over Doggerland - (no not a large car park near Southend-on-sea) but an area of land now lost to the North Sea and English Channel.
    Relics recovered by archaeologists have included bones of creatures associated with more Southerly climates, such as African cats, large mastodons such as elephants and Rhino. Amazing what you can drag up onto a trawler.

  • Alex
    Alex 21 day ago

    Awesome vidéo as always :) it would be so nice to see what you can do with it.

  • Timur4ik/ любит Mcpe


  • Timur4ik/ любит Mcpe

    ~✓ ~

  • Lost Son
    Lost Son 22 days ago

    5:20 is what my cereal looks like when it gets soggy.

  • buła tk
    buła tk 22 days ago

    nice house

  • buła tk
    buła tk 22 days ago

    thanks for lirics poland

  • Terminal Velocity
    Terminal Velocity 23 days ago

    Thank you for you fascinating content.

  • SAY10 Pug
    SAY10 Pug 23 days ago

    Primitive Technology - How to make a generator, a semi auto gun.

  • King Gizzard
    King Gizzard 23 days ago

    5:28 mmmm vanilla bean ice cream

  • Tommy Hammernots
    Tommy Hammernots 24 days ago

    Text at 1:32. Should you reply? No wait, don’t say anything...

  • gamer 24h
    gamer 24h 24 days ago

    Jesteś polakiem

  • Kerry Godbout
    Kerry Godbout 24 days ago

    He starts out all sciencey but in the end
    He’s just a guy poking stuff with a stick hahaha

  • FireD4rk
    FireD4rk 24 days ago


  • Jimmy Rustles
    Jimmy Rustles 26 days ago

    Would this work with egg shells?

  • MrVecau
    MrVecau 26 days ago


  • myth_speed
    myth_speed 26 days ago


  • Xantherea09
    Xantherea09 27 days ago

    will bone make lime?

  • Places Freak
    Places Freak 27 days ago

    Sind auch deutsche hier ?

  • matee
    matee 28 days ago

    cocaine brick??

  • Тургут Магомедов

    Для чего она вообще

  • Acidic Garden
    Acidic Garden 28 days ago

    would this work using sea shells?

  • Whoa
    Whoa 28 days ago


  • Lost soul
    Lost soul 28 days ago

    Are the shells still hot or is this just a chemical reaction

  • Mr Ahmand The Music
    Mr Ahmand The Music 29 days ago


  • uoqɐɹ uoslǝu ǝʌǝʇs

    I wonder if you can use egg shells and do the same thing?

  • Doug Alexander
    Doug Alexander Month ago

    I dig it!

  • William Koleszar
    William Koleszar Month ago

    Not only a survivalist... a freaking chemist too.

  • Scott Smith
    Scott Smith Month ago

    *blowing on hot coal intensifies*

  • [WUT]-*ՏաճցցўÖfŠքւճեօօռ*

    Me and a friend really like this stuff, I’ve made my own spear, still unfinished, out of a stick, with a pointed tip. He has a stick&string bow with stick arrows, and we are making a small stick hut for carving tools and water gathering. You are very lucky to live where you are, as we don’t have access to some stuff you do. Just want to say you are flippin awesome and I absolutely love this.

    P.S. we both are still kids (11 years old) lol

  • kropf leuchtenfuß
    kropf leuchtenfuß Month ago

    U need a shitton of snails for a limestone house🤣 I guess it would take generations to stockpile the shells for bricks and mortar. At least even on a beach u collect for ur grandchilds.
    Aside that, lime is a good desinfectant and a sanitizer for walls. Thats probably the better use.

  • Kyle Souza
    Kyle Souza Month ago

    What are thou plans dark warlock?

  • 그린나래나래
    그린나래나래 Month ago

    Primitive technology+bear grylls=invincibility

  • umeshu-umeko
    umeshu-umeko Month ago


  • WATE
    WATE Month ago

    What's the substance which he mixed in the scale stuff I mean the brown dirt sorry I'm glue less

  • DJ S
    DJ S Month ago

    Awesome video.
    Thank's for sharing.

  • Gress Redbone
    Gress Redbone Month ago

    I had some idea that you where Australian but the kookaburra confirmed it

  • Jakob Grunstein
    Jakob Grunstein Month ago

    what is that dirt you mix with the lime

  • Brian
    Brian Month ago

    Next thing we know he's going to invent concrete and start building aqueducts.

  • Duncan Tyrell
    Duncan Tyrell Month ago

    Hot shell fragments shooting out of the kiln causing 'annoyance'. lol

  • PopBoxHorror
    PopBoxHorror Month ago

    Someone is going to stumble upon this dude's camp one day and think they found an abandoned ancient village from the stone age.

  • 이성우
    이성우 Month ago

    Plz use pump drill
    Don't get hurt your hands

  • 風忒巴
    風忒巴 Month ago

    What sounds is it about 1:31 to 1:32?

  • Eryan724
    Eryan724 Month ago

    and some people thought primitive people would call what we do "magic" ...... seems just the other way around xD

  • Eryan724
    Eryan724 Month ago

    that reminds me of the horrible snail killing grandma from spongebob xDDD

  • Manh Vy
    Manh Vy Month ago

    hep me

  • Nahuel Omar Maruca
    Nahuel Omar Maruca Month ago

    0:06 yo de soltero.

  • Katie Margita
    Katie Margita Month ago

    Plz make more vids

  • Mel Manglicmot
    Mel Manglicmot Month ago

    Get this dude on naked and afraid already

    • Eryan724
      Eryan724 Month ago

      he wont fit..... he wont be afraid .... and probably not naked for long xD

  • Тимур Двойников

    я один здесь русский ахахахаха

  • PsaltyDog
    PsaltyDog Month ago

    Could you do this with bone instead? Both sources of calcium, or are they of different types?

  • InginTau
    InginTau Month ago

    always sub you, good video

  • InginTau
    InginTau Month ago

    always sub you, good video

  • Pasquale Noce
    Pasquale Noce Month ago

    We have EVOLVED

  • Hoàng Luân
    Hoàng Luân Month ago

    Mình rất thích kênh này.. rất hay không giả tạo như mấy kênh khác .. thank

  • NatoOn
    NatoOn Month ago

    Ready for Koh Lanta!

  • No Life
    No Life Month ago

    Can be used as paint 😉😉

  • Isaac Evans
    Isaac Evans Month ago

    Been out in the woods and still manages to keep a clean hair cut, now that's what I call a modern caveman

  • Денис Пырков

    Интересный замес... В нашем регионе почти любойканень карбонат кальция

  • DizzyMAC 227
    DizzyMAC 227 Month ago

    This man has nees of steel

  • arthurwkm
    arthurwkm Month ago

    I like how chill this guy is with animals. Most people wouldn't bother looking for the unnocupied shells

  • Maria Eva Cimafranca

    When a stranded guy find a camera and wifi

  • nunyu buz
    nunyu buz Month ago

    Just damn fine work bro.

  • sebastian przybylski

    where you do this video

  • AGPMandavel
    AGPMandavel Month ago

    Next on Primitive Technology: gun made of ants

  • Master Tracker
    Master Tracker Month ago

    The ancient stone walls and architecture in England which the Romans built was the result of men , women and children combing the beaches and shorelines around England collecting sea shells .

  • LambarnTV
    LambarnTV Month ago

    Хммм... не гашенная известь... интересно.

  • DesertEagleV
    DesertEagleV Month ago

    Got the ember going under 1 minute. Extremely impressive.

  • -tje
    -tje Month ago

    What is the red powder he puts in the “mud”

    • Eryan724
      Eryan724 Month ago

      read it in subtitles...

  • TheProGram
    TheProGram Month ago

    Imagine how many snails it will take to make a house with that stuff!

  • 麦兜
    麦兜 Month ago

    Why always summer?

  • LeafyMist
    LeafyMist Month ago

    Primitive Technology is Australian confirmed. I have heard the noises of the bush, the kookaburra was sitting in the old gum tree, and it gave your identity away. I will find you, this is only the first step.