Friday, March 29, 2019

Specification for a Concrete Footpath

Specification for a Concrete Footpathreality SAFETYThe area was taped and coned of so no traffic could intrude.The minelaying was fenced off with orange fencing so no pedestrians could have access. jibeExcavate total area to required depth 150mm and remove all told waste from site,Excavations are generally undertaken using the correct machines (8 tone digger)was utilise for this job. And the work undertaken is to excavate the required area to the correct depth hooklike on the specification being used, however there are umteen specifications for different applications, generally domestic footpaths excavate virgin ground to a depth of 160mm for new applications.But for this job there was crush already down so we excavated 160mm to 170mm to give some tolerance to put the shutters in. following we used a small whacker plate for 7 passes to compress a solid base for the concrete.To form go and cross supervenes to assist water escape. We took a level to the top of the step and t he shoemakers last level to work out the difference between them to get your fall which ours was 53mm. This is within tolerance for our specification.After the shutters are in place we move down DPM to stop moisture spreading into the concrete. Secondly we cut poise mesh so it fitted in but with an extra 50mm cut off each side to have sufficient cover to stop the concrete from rusting, also with a 50mm spacer for it to float in the middle. Once the concrete was poured in the vibrating poker is used all around the area to prevent any(prenominal) voids being left in the concrete. Next the concrete tampered down to succor compaction it allows the 20mm aggregate to sink. So when you come to float its easier to get a smoother cultivation. Lastly we finished the concrete with arris edges and a broom finish before leaving we covered the concrete with polyene to prevent prevail aim harming the concrete. Plans and surveysWe were responsible for set apartting out the footpaths accura tely to line and level in the dimensions that we were given that the instruction supplied, and arranged.All soil including old concrete paths shall be removed from the site and the area kept consecutive and tidy to arrest minimum obstruction to traffic ways during the course of the work. No carry of excavations shall be left on verges.DIMENSIONS 4.39m, 1.54m, 0.15m2.8m, 0.9m, 0.15mSUB-BASEWe use existing crush that was underneathFOOTPATHThis footpath with be 150mm thick with reinforce steel mesh.1.54m widely coming from the existing step, to existing kerb level 0.9m compiling with specification as its doesnt need wheel chair access. FORMWORK Formwork may be of all steel or planed timber and shall be fixed so as not to flex or displace during concreting operations. Formwork shall be of dimensions equal in depth to the thickness of the concrete to be poured.JOINTS Every 1.5m long cover 1.4m cubed Ready unifyed concrete with a slump of 125mm, Maximum aggregate size shall be 20mm , Sand shall be clean, sharp, washed from a river or quarry sand, free from silt and organic matter.BACKFILLExisting materialTools stain trowelArriss trowelPlastic floatShovelRake kookie broomClaw peckerLump hammerSledge hammerGeneratorVibrating pokerBolt cutterPlant8 liothyronine diggerConcrete lorryMaterials trade name shuttersWooden planksConcreteDPMSteel meshNailsSteel road pinsPolytheneConclusionsWe found out that weather condition is a factor we had quite a lot of fall during the time the concrete was curing. Therefore it took longer for it to set so we were hotfoot for time so when we came to put a brush finish on it was still too wet so the finish isnt as neat as it could be. So in future we should check the forecast antecedent to work.We could count for rain by putting a gazebo up prior to working.We also originally add more water to the mix which didnt help with the time consumption. So we shouldnt off added more water that would of set more rapidly.Before After

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