Common use of Mechanical Vibration Clause in Contracts

Mechanical Vibration. Concrete during and immediately after depositing shall be thoroughly compacted; unless otherwise provided, the compaction shall be done by mechanical vibration to the following requirements:- The concrete shall be compacted by means of a mechanical vibrator operated within the mass of concrete. when required by the Superintending Engineer vibration shall be supplemented by hand spading. The concrete shall be spaded by hand in all covers and angles of the forms, and along from faces while it is being vibrated. The concrete shall be vibrated with a frequency of not less than 3,500 impulses per minute. The vibration shall be of sufficient intensity and duration to cause flow or settlement in to place and complete compaction. Over vibration shall be avoided. The mechanical vibrator shall be: of a type and design approved by the Superintending Engineer. It shall be adequately powered and capable of transmitting vibration of the required frequency to the concrete. A sufficient number of mechanical vibrators shall be provided on the job so that each batch may be thoroughly compacted immediately after placing and that there will be no delay in placing and compacting ensuring batches. The vibrator shall be applied to the concrete, immediately after depositing and so manipulated that the concrete is reduced to a uniform plastic mass thoroughly compacted. It shall be thoroughly compacted around the reinforcement and worked into the corners and angles of the forms. The forms of the reinforcement shall not be vibrated. Concrete shall be placed in layers of uniform thickness not exceeding 300mm (12") and the apparatus so operatea tna the vibrating element aoes not penetrate through the layer of the fresh concrete and disturb the partially hardened concrete in lower layers. Vibrators shall not be pushed into or withdrawn from the mass of concrete too rapidly. The water content of the concrete shall be the minimum necessary to produce uniformly dense concrete free from aggregate pockets or honeycombing 10-16-12 Surface Finish: Immediately following the removal of forms all cavities produced by the removal of form ties and all other hooks and depressions honey-comb spots, broken edges of corners and other defect, shall be thoroughly cleaned, saturated with water and carefully pointed and rendered smoothly with mortar of cement and fine aggregate mixed in the proportions used in the xxxxx of concrete that is being finished and of as dry a consistency as is possible to use, Considerable pressure shall be applied in filling and pointing to ensure thorough filling in of all holes. Surfaces which have been pointed shall be kept moist for a period of 24 hours. All construction and expansion joints in the completed work shall be left carefully tooled and free of all mortar and concrete. Expansion joint filler shall be left exposed for its full length with clean and free edges. After the pointing is completed and the concrete hardened, all fins and irregularities shall be removed neatly by chipping and finished by using carborundum brick to produce a smooth finish. Entire surface after finishing shall present a smooth surface free from water pockets, air bubbles and other honey-comb spots. All such work shall considered incidental to the placing of concrete.

Mechanical Vibration. Concrete during and immediately after depositing shall be thoroughly compacted; unless otherwise provided, the compaction shall be done by mechanical vibration to the following requirements:- The concrete shall be compacted by means of a mechanical vibrator operated within the mass of concrete. when required by the Superintending Engineer vibration shall be supplemented by hand spading. The concrete shall be spaded by hand in all covers and angles of the forms, and along from faces while it is being vibrated. The concrete shall be vibrated with a frequency of not less than 3,500 impulses per minute. The vibration shall be of sufficient intensity and duration to cause flow or settlement in to place and complete compaction. Over vibration shall be avoided. The mechanical vibrator shall be: of a type and design approved by the Superintending Engineer. It shall be adequately powered and capable of transmitting vibration of the required frequency to the concrete. A sufficient number of mechanical vibrators shall be provided on the job so that each batch may be thoroughly compacted immediately after placing and that there will be no delay in placing and compacting ensuring batches. The vibrator shall be applied to the concrete, immediately after depositing and so manipulated that the concrete is reduced to a uniform plastic mass thoroughly compacted. It shall be thoroughly compacted around the reinforcement and worked into the corners and angles of the forms. The forms of the reinforcement shall not be vibrated. Concrete shall be placed in layers of uniform thickness not exceeding 300mm (12") and the apparatus so operatea tna the vibrating element aoes not penetrate through the layer of the fresh concrete and disturb the partially hardened concrete in lower layers. Vibrators shall not be pushed into or withdrawn from the mass of concrete too rapidly. The water content of the concrete shall be the minimum necessary to produce uniformly dense concrete free from aggregate pockets or honeycombing 10-16-12 Surface Finish: Immediately following the removal of forms all cavities produced by the removal of form ties and all other hooks and depressions honey-comb spots, broken edges of corners and other defect, shall be thoroughly cleaned, saturated with water and carefully pointed and rendered smoothly with mortar of cement and fine aggregate mixed in the proportions used in the xxxxx of concrete that is being finished and of as dry a consistency as is possible to use, Considerable pressure shall be applied in filling and pointing to ensure thorough filling in of all holes. Surfaces which have been pointed shall be kept moist for a period of 24 hours. All construction and expansion joints in the completed work shall be left carefully tooled and free of all mortar and concrete. Expansion joint filler shall be left exposed for its full length with clean and free edges. After the pointing is completed and the concrete hardened, all fins and irregularities shall be removed neatly by chipping and finished by using carborundum brick to produce a smooth finish. Entire surface after finishing shall present a smooth surface free from water pockets, air bubbles and other honey-comb spots. All such work shall considered incidental to the placing of concrete.honeycombing

Mechanical Vibration. Concrete during and immediately after depositing shall be thoroughly compacted; unless otherwise provided, the compaction shall be done by mechanical vibration to the following requirements:- The concrete shall be compacted by means of a mechanical vibrator operated within the mass of concrete. when VVhen required by the Superintending Engineer vibration shall be supplemented by hand spading. The concrete shall be spaded by hand in all covers and angles of the forms, and along from faces while it is being vibrated. The concrete shall sha" be vibrated with a frequency of not less than 3,500 impulses per minute. The vibration shall be of sufficient intensity and duration to cause flow or settlement in to place and complete compaction. Over vibration shall be avoided. The mechanical vibrator shall be: of a type and design approved by the Superintending Engineer. It shall be adequately powered and capable of transmitting transmit!ing vibration of the required frequency to the concrete. A sufficient number of mechanical vibrators shall be provided on the job so that each batch may be thoroughly compacted immediately after placing and that there will be no delay in placing and compacting ensuring batches. The vibrator shall be applied to the concrete, immediately after depositing and so manipulated that the concrete is reduced to a uniform plastic mass thoroughly compacted. It shall be thoroughly compacted around the reinforcement and worked into the corners and angles of the forms. The forms of the reinforcement shall not be vibrated. Concrete shall be placed in layers of uniform thickness not exceeding 300mm (12") and the apparatus so operatea tna the vibrating element aoes not penetrate through the layer of the fresh concrete and disturb the partially hardened concrete in lower layers. Vibrators shall not be pushed into or withdrawn from the mass of concrete too rapidly. The water content of the concrete shall be the minimum necessary to produce uniformly dense concrete free from aggregate pockets or honeycombing 10-16-12 Surface Finish: Immediately following the removal of forms all cavities produced by the removal of form ties and all other hooks and depressions honey-comb spots, broken edges of corners and other defect, shall be thoroughly cleaned, saturated with water and carefully pointed and rendered smoothly with mortar of cement and fine aggregate mixed in the proportions used in the xxxxx of concrete that is being finished and of as dry a consistency as is possible to use, Considerable pressure shall be applied in filling and pointing to ensure thorough filling in of all holes. Surfaces which have been pointed shall be kept moist for a period of 24 hours. All construction and expansion joints in the completed work shall be left carefully tooled and free of all mortar and concrete. Expansion joint filler shall be left exposed for its full length with clean and free edges. After the pointing is completed and the concrete hardened, all fins and irregularities shall be removed neatly by chipping and finished by using carborundum brick to produce a smooth finish. Entire surface after finishing shall present a smooth surface free from water pockets, air bubbles and other honey-comb spots. All such work shall considered incidental to the placing of concrete.honeycombing