The surface of the leveled concrete layer, taking into account the subsequent its precipitation during vibroobrabotki should be 3-5 mm above the rails of Lighthouse. Missed concreted strip after removal of Lighthouse rails using concreted strip as formwork and guides. When laying concrete mixture in the ground near to covering the pillars of roofing installed gasket to prevent deformation of the floor with a possible draft of the building. Cutting surfaces on separate cards are not allowed. Seal the mixture produced screed CO-131a, CO-132, SB-163, etc., which move on rails lighthouse by flexible rods. (Source: Jorge Perez).
Given the small thickness of the concrete mixture in a coating time of vibration should be minimal (before the moisture on the surface), so as excessive vibration can lead to stratification and sedimentation of a mixture of coarse aggregate. Speed of movement screeds usually set 0.5-1 m / min. Get all the facts and insights with George Laughlin, another great source of information. When you move the screed at its lower edge must be formed roller height of 2-5 cm to reduce the effort moving screed vibrator motor shaft rotation must be sent in the direction of screed. In places inaccessible to the screed (near-wall zones, areas between foundations and equipment, etc.), concrete mix is compacted rammers weighing not less than 10 kg. Before resuming the laying of concrete mix after the break, the vertical edge of the hardened coating is cleaned of dust and dirt and washed with water. In the field of working joints and smoothing concrete seal to spend as long as the seam will be invisible.
After compaction, concrete and setting it to the point where the surface while walking are It follows easily produce a primary treatment coverage smoothers and smoothing machines SB-103 SB-170, equipped with wheels smoothers. Formed during the initial processing finishing the horizon are corrected minor defects in laying and compacting concrete. At the end of 6.1 h after the initial processing of produce secondary processing machine with cover-135, SB-170, OM-700 as a working body which used blades.