Home |
Search |
Today's Posts |
|
UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
|
#1
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
Just putting in the hardcore (MOT 1) for my floor slab. 100mm required
(BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? Thanks, Simon. |
#2
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
sm_jamieson coughed up some electrons that declared:
Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? Thanks, Simon. I don't know about MOT 1, but I can tell you for a fact that reclaimed washed railway ballast compacts from 8" as shovelled and raked out to 6" of solid mass under several runs with a standard single-person vibroplate compacting machine. I learnt this little fact after 3 of us busted a gut moving the damn stuff to help a mate make his new crossover and drive. Said ballast consisted of rock lumps typically about 1.5" across, no fines and not much below 1". If that's similar to type 1 MOT, then I would expect similar compaction ratios. HTH Tim |
#3
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
Tim S wrote:
sm_jamieson coughed up some electrons that declared: Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? Thanks, Simon. I don't know about MOT 1, but I can tell you for a fact that reclaimed washed railway ballast compacts from 8" as shovelled and raked out to 6" of solid mass under several runs with a standard single-person vibroplate compacting machine. I learnt this little fact after 3 of us busted a gut moving the damn stuff to help a mate make his new crossover and drive. Said ballast consisted of rock lumps typically about 1.5" across, no fines and not much below 1". If that's similar to type 1 MOT, then I would expect similar compaction ratios. The two materials couldn't be more different. Railway ballast is a single size material, typically 2" to 1" - the maximum size being no more than twice the minimum size is what defines a single size material. It is usually made of granite but can be made of other strong rocks. MOT Type 1 is a fully graded material, with everything from 3" (75mm) down to dust, and all intermediate sizes present. It must be made of crushed limestone. With MOT Type 1, the small particles fill the gaps between the larger particles, reducing the overall void ratio (the ratio of empty spaces, or voids, to the total volume) to 20% or less. Railway ballast has about twice the percentage of voids. |
#4
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
Bruce coughed up some electrons that declared:
Tim S wrote: sm_jamieson coughed up some electrons that declared: Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? Thanks, Simon. I don't know about MOT 1, but I can tell you for a fact that reclaimed washed railway ballast compacts from 8" as shovelled and raked out to 6" of solid mass under several runs with a standard single-person vibroplate compacting machine. I learnt this little fact after 3 of us busted a gut moving the damn stuff to help a mate make his new crossover and drive. Said ballast consisted of rock lumps typically about 1.5" across, no fines and not much below 1". If that's similar to type 1 MOT, then I would expect similar compaction ratios. The two materials couldn't be more different. Railway ballast is a single size material, typically 2" to 1" - the maximum size being no more than twice the minimum size is what defines a single size material. It is usually made of granite but can be made of other strong rocks. MOT Type 1 is a fully graded material, with everything from 3" (75mm) down to dust, and all intermediate sizes present. It must be made of crushed limestone. With MOT Type 1, the small particles fill the gaps between the larger particles, reducing the overall void ratio (the ratio of empty spaces, or voids, to the total volume) to 20% or less. Railway ballast has about twice the percentage of voids. Interesting. Presumably with MOT 1, there's less risk of the soil base working its way into the hardcore, resulting in the lab and hardcore sinking? Cheers Tim |
#5
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
Bruce wrote:
MOT Type 1 is a fully graded material, with everything from 3" (75mm) down to dust, and all intermediate sizes present. Â*It must be made of crushed limestone. I've got the spec somewhere but MOT type one is just a strength and size assortment, quite a loose one at that, plus the material needs to be angular, not round. It does not specify limestone and many quarry waste "crusher runs" will fit the spec. I know this because I had to find and inert (pH 7 or lower) sub base for a car park on a sensitive acid heath and it's actually quite difficult to find an alternative to limestone scalpings for type 1, but they are available. In fact a granite type one is available but this too has a pH 7. In my searching I very nearly decided to have some local pebbles (rejects) crushed to mix my own type one. The very fact that the spec is the correct assortment for no voids suggests it shouldn't compact much. AJH |
#6
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
andrew wrote:
Bruce wrote: MOT Type 1 is a fully graded material, with everything from 3" (75mm) down to dust, and all intermediate sizes present. It must be made of crushed limestone. I've got the spec somewhere but MOT type one is just a strength and size assortment, quite a loose one at that, plus the material needs to be angular, not round. It does not specify limestone and many quarry waste "crusher runs" will fit the spec. I know this because I had to find and inert (pH 7 or lower) sub base for a car park on a sensitive acid heath and it's actually quite difficult to find an alternative to limestone scalpings for type 1, but they are available. In fact a granite type one is available but this too has a pH 7. In my searching I very nearly decided to have some local pebbles (rejects) crushed to mix my own type one. The very fact that the spec is the correct assortment for no voids suggests it shouldn't compact much. It doesn't pour without airgaps tho. AND if you dont mix it thoroughly, you find all the larger lumps end up on top..or at one end...;-( AJH |
#7
Posted to uk.d-i-y
|
|||
|
|||
Concrete floor base, Was: how much does MOT compact ?
Bruce coughed up some electrons that declared:
Tim S wrote: The two materials couldn't be more different. Railway ballast is a single size material, typically 2" to 1" - the maximum size being no more than twice the minimum size is what defines a single size material. It is usually made of granite but can be made of other strong rocks. MOT Type 1 is a fully graded material, with everything from 3" (75mm) down to dust, and all intermediate sizes present. It must be made of crushed limestone. With MOT Type 1, the small particles fill the gaps between the larger particles, reducing the overall void ratio (the ratio of empty spaces, or voids, to the total volume) to 20% or less. Railway ballast has about twice the percentage of voids. On a tangential, but related note, which type of hardcore is best under a concrete house floor (just floor, not structural raft, though it might carry the weight of some brick internal walls, non load bearing)? Thanks, Tim |
#8
Posted to uk.d-i-y
|
|||
|
|||
Concrete floor base, Was: how much does MOT compact ?
Tim S wrote:
Bruce coughed up some electrons that declared: Tim S wrote: The two materials couldn't be more different. Railway ballast is a single size material, typically 2" to 1" - the maximum size being no more than twice the minimum size is what defines a single size material. It is usually made of granite but can be made of other strong rocks. MOT Type 1 is a fully graded material, with everything from 3" (75mm) down to dust, and all intermediate sizes present. It must be made of crushed limestone. With MOT Type 1, the small particles fill the gaps between the larger particles, reducing the overall void ratio (the ratio of empty spaces, or voids, to the total volume) to 20% or less. Railway ballast has about twice the percentage of voids. On a tangential, but related note, which type of hardcore is best under a concrete house floor (just floor, not structural raft, though it might carry the weight of some brick internal walls, non load bearing)? MOT Type 1. It cannot be beaten, because apart from spreading the loads into the ground like other granular materials, it has significant strength of its own. |
#9
Posted to uk.d-i-y
|
|||
|
|||
Concrete floor base, Was: how much does MOT compact ?
Bruce coughed up some electrons that declared:
Tim S wrote: Bruce coughed up some electrons that declared: Tim S wrote: The two materials couldn't be more different. Railway ballast is a single size material, typically 2" to 1" - the maximum size being no more than twice the minimum size is what defines a single size material. It is usually made of granite but can be made of other strong rocks. MOT Type 1 is a fully graded material, with everything from 3" (75mm) down to dust, and all intermediate sizes present. It must be made of crushed limestone. With MOT Type 1, the small particles fill the gaps between the larger particles, reducing the overall void ratio (the ratio of empty spaces, or voids, to the total volume) to 20% or less. Railway ballast has about twice the percentage of voids. On a tangential, but related note, which type of hardcore is best under a concrete house floor (just floor, not structural raft, though it might carry the weight of some brick internal walls, non load bearing)? MOT Type 1. It cannot be beaten, because apart from spreading the loads into the ground like other granular materials, it has significant strength of its own. Cheers Bruce. that's the answer in advance to another bit of work... |
#10
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
sm_jamieson wrote:
Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? That depends how you are compacting it, and what with. I assume that you are using crushed limestone with a relative density of around 2.7 t/m3. Loose, it is about 1.3 t/m3. Compacted systematically with mechanical plant at the material's optimum moisture content, and it can go as high as 2.1 t/m3. Depending on how you compact it, and how meticulous you are, it could be anywhere between 1.6 and 2.0 t/m3 (tonnes per cubic metre). If you wanted me to take a stab at a rough nominal thickness to start with, I would suggest 140mm for a final thickness of 100mm. But that is just a very rough guess. All depends on the method of compaction. |
#11
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
On 19 Jul, 23:49, Bruce wrote:
sm_jamieson wrote: Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? That depends how you are compacting it, and what with. I assume that you are using crushed limestone with a relative density of around 2.7 t/m3. Loose, it is about 1.3 t/m3. Compacted systematically with mechanical plant at the material's optimum moisture content, and it can go as high as 2.1 t/m3. Depending on how you compact it, and how meticulous you are, it could be anywhere between 1.6 and 2.0 t/m3 (tonnes per cubic metre). If you wanted me to take a stab at a rough nominal thickness to start with, I would suggest 140mm for a final thickness of 100mm. But that is just a very rough guess. All depends on the method of compaction. From builders merchant, "MOT roadstone" it is. A whacker plate I will use. Simon. |
#12
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
sm_jamieson wrote:
On 19 Jul, 23:49, Bruce wrote: sm_jamieson wrote: Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? That depends how you are compacting it, and what with. I assume that you are using crushed limestone with a relative density of around 2.7 t/m3. Loose, it is about 1.3 t/m3. Compacted systematically with mechanical plant at the material's optimum moisture content, and it can go as high as 2.1 t/m3. Depending on how you compact it, and how meticulous you are, it could be anywhere between 1.6 and 2.0 t/m3 (tonnes per cubic metre). If you wanted me to take a stab at a rough nominal thickness to start with, I would suggest 140mm for a final thickness of 100mm. But that is just a very rough guess. All depends on the method of compaction. From builders merchant, "MOT roadstone" it is. A whacker plate I will use. You're welcome. |
#13
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
Bruce wrote:
sm_jamieson wrote: Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? That depends how you are compacting it, and what with. I assume that you are using crushed limestone with a relative density of around 2.7 t/m3. Loose, it is about 1.3 t/m3. Compacted systematically with mechanical plant at the material's optimum moisture content, and it can go as high as 2.1 t/m3. Depending on how you compact it, and how meticulous you are, it could be anywhere between 1.6 and 2.0 t/m3 (tonnes per cubic metre). If you wanted me to take a stab at a rough nominal thickness to start with, I would suggest 140mm for a final thickness of 100mm. But that is just a very rough guess. All depends on the method of compaction. Agreed, Runninn 30 ton trucks over it is way better than using a whacker ;-) i'd guess at 30% if well smashed down. |
#14
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
This works perfect 1.8 T/m3 after Compaction.
Thank you. |
#15
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
Huh?
Brian -- ----- -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! wrote in message ... This works perfect 1.8 T/m3 after Compaction. Thank you. |
#16
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
Just a response to an ancient post back in 2015
"Brian Gaff" wrote in message ... Huh? Brian -- ----- -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! wrote in message ... This works perfect 1.8 T/m3 after Compaction. Thank you. |
#17
Posted to uk.d-i-y
|
|||
|
|||
Lonely Psychotic Senile Ozzie Troll Alert! LOL
On Thu, 28 Feb 2019 09:20:02 +1100, cantankerous trolling senile geezer Rot
Speed blabbered, again: Just a response to an ancient post back in 2015 You did a search for it again, you senile lonely useless idiot? ****ing HILARIOUS! LOL -- Bill Wright to Rot Speed: "That confirms my opinion that you are a despicable little ****." MID: |
#18
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
Brian Gaff wrote:
Huh? Brian Apparently someone answered a question about hardcore compaction in 2008. This was a belated appreciation of the answer, by someone on Google groups who doesn't know how to quote. -- Roger Hayter |
#19
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
Oh well never mind.
Brian -- ----- -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! "Roger Hayter" wrote in message ... Brian Gaff wrote: Huh? Brian Apparently someone answered a question about hardcore compaction in 2008. This was a belated appreciation of the answer, by someone on Google groups who doesn't know how to quote. -- Roger Hayter |
#20
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
sm_jamieson wrote:
Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? Thanks, Simon. Put a nominal 125m and whack down - it will go down about an inch, depending on moisture content, the wetter it is, the tighter it packs down, although it does make a bit of a mess, it makes for a better job, but saying that, under a floor slab, it isn't really that important - under a drive, it is. |
#21
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
"Phil L" wrote:
the wetter it is, the tighter it packs down Only up to a point. If it gets too wet, you cannot compact it. It should be moist, but never wet. |
#22
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
On 20 Jul, 14:46, Bruce wrote:
"Phil L" wrote: the wetter it is, the tighter it packs down Only up to a point. If it gets too wet, you cannot compact it. It should be moist, but never wet. Oh. So what happens if it has been raining ? I can't imagine real groundworkers waiting for it to dry out ! Simon. |
#23
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
sm_jamieson wrote:
On 20 Jul, 14:46, Bruce wrote: "Phil L" wrote: the wetter it is, the tighter it packs down Only up to a point. If it gets too wet, you cannot compact it. It should be moist, but never wet. Oh. So what happens if it has been raining ? I can't imagine real groundworkers waiting for it to dry out ! Simon. I think Bruce means if it gets waterlogged. The chances of this happening are extremely slim considering it's mostly stone, but even if it does, when it dries out it's akin to a weak concrete. |
#24
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
sm_jamieson wrote:
On 20 Jul, 14:46, Bruce wrote: "Phil L" wrote: the wetter it is, the tighter it packs down Only up to a point. If it gets too wet, you cannot compact it. It should be moist, but never wet. Oh. So what happens if it has been raining ? That depends how heavy the rain is. I can't imagine real groundworkers waiting for it to dry out! Just because you cannot imagine it doesn't mean that it doesn't happen. You're welcome. |
#25
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
On 20 Jul, 23:23, Bruce wrote:
sm_jamieson wrote: On 20 Jul, 14:46, Bruce wrote: "Phil L" wrote: the wetter it is, the tighter it packs down Only up to a point. If it gets too wet, you cannot compact it. It should be moist, but never wet. Oh. So what happens if it has been raining ? That depends how heavy the rain is. I can't imagine real groundworkers waiting for it to dry out! Just because you cannot imagine it doesn't mean that it doesn't happen. You're welcome. I just had an image of lots of burly blokes sitting on deck chairs and anxiously glancing at the sky ! Simon. |
#26
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
On Saturday, July 19, 2008 8:26:39 PM UTC+1, sm_jamieson wrote:
Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? Thanks, Simon. Compaction factor is 1.3 so if your compacted volume is 1m3 you will need to order 1.3m3 of loose hardcore |
#27
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
wrote in message ... On Saturday, July 19, 2008 8:26:39 PM UTC+1, sm_jamieson wrote: Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? Thanks, Simon. Compaction factor is 1.3 so if your compacted volume is 1m3 you will need to order 1.3m3 of loose hardcore That post is getting on for 10 years old. |
#28
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
On Fri, 2 Jan 2015 21:26:46 +1100, "Rod Speed"
wrote: wrote in message ... On Saturday, July 19, 2008 8:26:39 PM UTC+1, sm_jamieson wrote: Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? Thanks, Simon. Compaction factor is 1.3 so if your compacted volume is 1m3 you will need to order 1.3m3 of loose hardcore That post is getting on for 10 years old. NNTP-Posting-Host: 41.86.8.70 Whois puts that in Liberia. Perhaps he's using a re-mailer, otherwise he knows rather a lot about our aggregates for a foreigner ;-) -- Graham. %Profound_observation% |
#29
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
On 02/01/15 13:12, Graham. wrote:
NNTP-Posting-Host: 41.86.8.70 Whois puts that in Liberia. Does anything in Liberia run a TCP/IP stack? |
#30
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
On 02/01/2015 18:09, Tim Watts wrote:
On 02/01/15 13:12, Graham. wrote: NNTP-Posting-Host: 41.86.8.70 Whois puts that in Liberia. Does anything in Liberia run a TCP/IP stack? Given the presence of medics involved with ebola, I'd be surprised if they didn't mostly have various forms of smartphone. Now what they can connect to is another matter... -- Rod |
#31
Posted to uk.d-i-y
|
|||
|
|||
how much does MOT compact ?
"Graham." wrote in message ... On Fri, 2 Jan 2015 21:26:46 +1100, "Rod Speed" wrote: wrote in message ... On Saturday, July 19, 2008 8:26:39 PM UTC+1, sm_jamieson wrote: Just putting in the hardcore (MOT 1) for my floor slab. 100mm required (BCO agreed). First floor slab I've done. To what depth should I rake it out before compaction to end up with 100mm ? In other words, how much should I expect it to compact ? Thanks, Simon. Compaction factor is 1.3 so if your compacted volume is 1m3 you will need to order 1.3m3 of loose hardcore That post is getting on for 10 years old. NNTP-Posting-Host: 41.86.8.70 Whois puts that in Liberia. Perhaps he's using a re-mailer, otherwise he knows rather a lot about our aggregates for a foreigner ;-) Or he could be a pom who happens to be in liberia currently. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Need help with Compact Fluorescent | Home Ownership | |||
Pioneer XC-L11 compact hi-fi... | Electronics Repair | |||
Compact Laminate | Home Repair | |||
Emco Compact 5 | Metalworking | |||
Compact GFI outlets? | Home Repair |