MAINTENANCE OF CONCRETE DRAIN PIPES-Drain pipes after the centrifugal from 3-5 hours to be by water, nourishing balm worker households must face wet water pump in and out of the drain pipe.-Factory manager to prepare the sequence of procedures regarding maintenance, including methods and materials for daily maintenance. The entire production of new concrete drain pipes must be maintenance and maintenance work will start shortly after the end of poured concrete and be extended within as little as 7 days. Maintenance must be conducted to keep the moisture on the surface of the concrete drain pipes and is an integral part of the work of nursing households drain pipes in concrete.-Method "provides the backend" described below will be used to maintain the surface of the concrete drain tube gets out except with the required technical and/or approved by the other.When allowed by engineering, factory manager can use one of the following methods or a combination of methods are defined below to maintain the surface of the concrete drain pipes.I. PROVIDES THE BACKENDThis method includes the addition of moisture by soaking water, watering or spraying water. The mantle as the sacks will be used to keep the amount of water that has just been added according to the way out. Not allowed to use sawdust and alter colors, coatings for concrete drain pipes. Any one method would make wet concrete drain pipes and dried are considered improper maintenance methods. The coating must be set up on the surface of concrete sewer pipes as soon as possible as soon as completed the task of improving and no longer cause harm to the concrete surface. The coating must always be kept moist. The water used to be clean water to drink is not contain oil, acid, salt, sugar, or other harmful substances used for maintenance of concrete drain pipes.* PREVENTS THE LOSS OF MOISTUREThis method involves preventing the loss of humidity of concrete sewer pipes. This work could be conducted using paper or plastic plates, waterproofing mixtures of liquid membrane maintenance except those where the requirement prohibits the use of this mixture. Exposures of concrete drain pipes, must be covered with sacks or similar material has been approved as soon as the concrete has hardened enough to withstand these materials without damage to the surface finishing. This moisturizing materials should then be soaked with water-proof and covered with plastic sheeting or waterproof paper.* WATERPROOF PAPERThis paper must be the width of the widest possible use and the side panels must be placed a minimum of 15 cm overlap and be fastened with adhesive tape, pressure sensitive adhesive, matít or other approved methods to create a waterproof coating on the entire surface of the concrete drain pipes. This paper must be guaranteed so that not to be the wind do move. If any part of this coverings torn or damaged before the expiry of maintenance, the part that must be corrected immediately. Water will be sprayed under the edge of the shoulder joint and at on the day after pouring concrete and the time intervals to maintain moist condition. * PLASTIC PLATESThe plastic sheets are used in the correct manner is required above for the waterproof paper.* FORMWORKThe wooden formwork concrete sewer covers must be moistened with water regularly to avoid dryness during maintenance. Formwork metal exposure under the Sun to be a cool cover from the direct rays of sunshine, the white paint or by other protection during maintenance. When lifted the formwork before the end of the long maintenance periods 7 days, factory manager to deploy the required maintenance procedures and maintenance continues until kếtthúc maintenance 7 days time as has been defined. APPROVAL
đang được dịch, vui lòng đợi..
