A, to the request of the concrete
1, the strength attains the C25 above.( the C20 is above at least)
2, the ash of water compare to be no higher than 0.4.
3, the concrete of the spot agitation fall to fall the degree and should be no bigger than the 5 cms, the pump send to the concrete to fall to fall the degree and should be no bigger than the 12 cms.
4, for a ping of concrete that sprinkle to note two times, it face the layer thickness and should be no lower than the 5 cms.
5, in order to attain the better result, the suggestion adds the reinforcing bar net in the concrete.( the reinforcing bar diameter should the ≥φ 16)

Two, the regulation that concrete sprinkles to note
1, sprinkle to note to need to divide the camalig to carry on in sequence, avoid the concrete coagulation unbalance.
2, for insure the concrete to is enough mobility, slow ning , can the adequacy add the slow ning to reduce the of water.
3, suggest a sex to sprinkle to note to go to design the elevation, need to sprinkle water to make the foundation be placed in the moist appearance if be not enough to establish the waterproof thin film,,.
4, need to flap concrete actually, is a side Cape part particularly.
5, if the surface appears the water, needing to do away with the water.
6, the early and even work is as far as possible neat, for the convenience of in end complete to face to attain high and low bad small in 3 mms/2 Ms.

Three, the construction step
1, do away with to float the syrup:The concrete surface appears to float the syrup, should use the machine to whet the dish and will float the syrup breakage to drop.
2, put on the even homework:Whet the dish to do 2-3 times with the machine to put on in the concrete surface of the early even.
3, the surface accepts the light homework:After in the homework of empress, see the hardening circumstance of the concrete, carry on at least 3-4 times machine oar slice accepts the light homework.
4, protect the work:Accept the ground,12 hours that light like completely, internal help adopts to protect the measure.Protect the way can adopt to protect to protect, sprinkling water to protect or the plastics thin film protect.
5, incise the stretch and shrink to sew:For avoiding the concrete openning the lie because of cold suo of hot bulge, should saw to mow the stretch and shrink to sew in time.Separate an of 6-12 meters each time generally, combine a circumstance of the spot pillar to saw to mow may also.