Category: Concrete

  • Floor Slab is Poured!

     What A Day!

    7 AM

    We started at 7am at the crack of dawn to clear away as much as possible the rain water still puddling on the DPM plastic by using our home made contraption, a blend of a vacuum cleaner extended upwards with a powerful water pump sitting inside it!!

    Pouring-the-floor-slab-1

    Pouring-the-floor-slab-1

    We got about two third of the area cleared before the first of the heavy vehicles arrived, the pump engine with its 30 metre boom arm (time was  8:21am) and soon after the technician chap also arrived in his van, closely followed by the first 6½ cubic metres of the special crushed granite with nylon fibre mixed in a high cement content and special emulsifiers to make a very liquid flowing mixture!

     9 AM

    We started on the Perimeter Wall, filling all the hollow columns using our (another) homemade deflector tool. It worked rather well, with only small amount of dribbling cement and small crunchy bits escaping outside rather than inside the wall. We managed to do almost all of it using the boom arm pumping the concrete, only missing out about 15 hollow cores because the boom arm couldn’t reach that far!

    Pouring-the-floor-slab-2

    Pouring-the-floor-slab-2

    That was also the end of the first load of concrete too! Most of it went inside and about half filled all the hollow columns.

     10 AM

    That was the slow bit done and now the pump could go much faster indeed, and when the 2nd lorry load of concrete parked itself next to the pump (this lorry and the 3rd lorry were already arrived and waiting up on Beccles Road!!), the whole content, another 6½m3 of it, came gushing out all in 10minutes flat!! The boom arm went around all over the place to try and load some concrete in each cellular region so the dividers won’t feel overstressed. The same happened to the third lorry load and by 10:30am they were emptied and gone!

    Pouring-the-floor-slab-3

    Pouring-the-floor-slab-3

    11am

    While we were waiting for the next two lorry loads of the concrete, we went around cleaning off the dribbles of cement and the crunchy bits off the bitumen coated exterior surface using the garden hose with the spray nozzle. Our technician chap helped by filling in the last 15 hollows columns in the far corner of the wall too!

    12pm

    Finally, the next two lorry loads of concrete arrived, the 3rd 6½m3 and a 3m3 and started filling regions right to the top. Then we were getting worried that we wouldn’t have enough as it was looking rather the strong possibility that we would need extra but we also were wondering why this was. Then, we discovered that we had overfilled the Great Room and in some places it was more than 10mm extra thicker. Oops! This encouraged us to slow down and be more careful with the 5th load of the 3m3 load.

    Pouring-the-floor-slab-4

    Pouring-the-floor-slab-4

    The technician chap was working hard in dabbling the concrete to make it smooth out and find a good level, and then spraying the surface with wax to slow down the evaporation.

    2pm

    After we had levelled and smoothed the regions that has been filled up, we than calculated to approximately what extra amount of concrete we needed to finish off the job. It came to 2½ m3 so we phoned the Norwich office to order that and of course having to wait again for it to come all the way from Norwich.

    3:45 pm

    Finally, the 6th and final load of concrete arrived and got the rest of the Floor Slab poured in, carefully making sure we didn’t overfill anything this time and it went well!

    Pouring-the-floor-slab-5

    Pouring-the-floor-slab-5

    4pm

    All Finished!! The pump Machine cleaned itself and dumped it hopper load of concrete that it sucked back up it pipes, on the plastic we laid there just for that purpose, and using wheelbarrows, we scooped up about 7 loads and took it over to the front door region to tip it in to finish off the very final bit of filling up. Then, we washed down everything and coiled up hoses and washed our boots and staggered back indoors!!

    Pouring-the-floor-slab-6

    Pouring-the-floor-slab-6

     

    The Movie

    Here is the time lapsed movie of our whole day compressed down to just a 20 minutes!!

  • Concrete Filling Begins on Back Wall

    This afternoon, we began the task of filling up 101 hollow columns in the
    back wall of the retaining wall of the swimming lane.

    We got things organised and place the newly created platforms and ramp in
    place to take up the wheelbarrow loads of concrete.

    We are using pea sized ballast to get the concrete to wiggle down the tight columns that has a reinforcing rod up the middle as well as layers of horizontal steel rods every two layers of blockwork.

    The vibrator machine is very good for knocking the pocket air out and make
    sure we got a solidly packed column of good quality concrete.

    We filled nearly 2 columns, learning how to get the mixture up and tilted
    into the tops of the blocks, how long to mix the concrete (3 large builders
    buckets of ballast, about 40litres, against a smaller bucket of cement,
    about 8.5 litres, to make a half load in the mixer plus about 6 litres of
    water)

    Tomorrow, we can really get a routine going with 4 wheelbarrows to take the
    load of a completely full mixer (a whole bag of cement and 6 buckets), run
    them up and emptied into four columns and repeat. We can hope to do about 15
    columns per hour, so about 6 or 7 hours to do the 101 columns in total.

    First-Two-Columns-Filled

    First-Two-Columns-Filled

  • Snow Stops Play!

    We woke up to a thin layer of snow on some of the raised objects (off the wet ground) where it didn’t melt. The temperature is hovering around the freezing point, which is not good for concrete. So we wait for the warmer spell that is supposed to be coming soon!

    Snowy-Ballast

    Snowy-Ballast

  • Garage slab concrete poured

    After the problems bailing out the actual pour went smoothly!

    There were 3 loads of concrete (Agilia Force) delivered between 11:00 and 12:15. Each load only took 3-4 minutes to pour into the formwork! The mix was quite fluid and only need gentle encouragement to spread out evenly, we only had to walk around pushing with our boots to get a good level.

    When we were satisfied we had a even distribution of concrete the Lafarge rep (Kevin) brought out his agitator bars. These are round poles held horizontally with two handles rising up to hold. These had to be used in two passes, 1st pass involved moving up and down about 50mm then advancing by the width of the pole and repeating (this releases any traped air). 2nd pass was a light dabble over the surface to give a smooth finish.

    The rain continued to fall in showers (even hail) while we were working and Daphne bailed out some of the excess water from the corners where it had been pushed by the concrete.

    Finally Kevin sprayed a wax based agent all over the finished concrete to help the slab cure properly.

    Here is an edited and speeded up (16 times) video of the pour.

  • Water, water everywhere!

    Well we had 10.9mm of rain since we finished the DPM Yesterday. That’s over 800 litres of water to get out of the garage slab DPM.

    The job was not as easy as we thought when we started at 9 o’clock. First we tried the submersible pump – no go, the water was not deep enough. Then we used the drill pump successfully for 1/2 an hour before it overheated! At this point probably half the water had been removed. Third try was using sponges and towels! – this worked but was very slow. Then Shaun remembered the wet and dry vacuum cleaner – this worked well, better than any of the other things.

    By this time it had started to rain again! and Kevin (Lafarge man on the spot) said we had got rid enough water! So it time for the concrete.

    Ready for Concrete

  • Its raining !

    According to the weather meter we have had 3.5mm of rain in the last hour…

    This is nearly 270 litres of water in our slabs DPM ‘tank’ . We will have some bailing to do in the morning.

  • Started and stopped concreting the tank.

    Started mixing concrete and pouring round the base of the tank but we were stoppped by the mixer breaking down. Took it apart and found the motor start capacitor has blown up.The capacitor with the electrolite boiled out the side.

    Ordered a replacement so hopefully will restart the concreting tomorrow.