Mixture Layer

In remote areas cover before the main processing area will be overwritten by power trowel grout cement screeds SB-89A or manually. When laying concrete pavement on the concrete subsurface layer of appropriate run simultaneously with the coating underlay, applying his method of vacuum concrete device that lets you mark in the surface layer of concrete is 30% higher than the original concrete grade and high physical and mechanical characteristics of the surface layer of concrete, defining a set of required quality of concrete. Technology devices of this type of concrete floors, based on the method of evacuation concrete is that concrete mix slump with 11.9 cm, which is achieved through the introduction of additional water, compacted screed, and then the thickness of the concrete using a vacuum unit and suction mats remove excess mixing water. Concrete becomes rigid and strong enough for immediate processing of the surface layer smoothing machines. In general, the concrete composition is selected according to quality characteristic of the existing fill and cement. In order to achieve the greatest effect sealing of the concrete mixture, administered with a high content of the mortar. The mobility of the mixture to a vacuum 11.9 cm; stiffness after vacuuming - 30-40. Trucks delivered the concrete mixture is discharged directly to the place of laying between the guides of the hard metal or wood-forms - or fed to the formwork place of stacking buckets, tape, or concrete-concrete pumps.

Concrete mixture is spread evenly scrapers over the entire area of the site. Thicken the mixture with a layer thickness of 10 cm screed CO-131a, CO-132, SB-163, and a thickness layer of 10 cm and the presence of reinforcing mesh - vibrators and screeds. On compacted and leveled concrete layer is spread suction pads that connect to a vacuum unit through a flexible hose with connectors. If the layout of suction mats lower filtering cloth is laid directly on the fresh concrete, and the top roll, smoothing roller or brush, starting from the middle, which improves seal during evacuation.