Implementation plan for adding FST white to black overlay on cement concrete pavement for truck parking
At 10:30 am on January 21, 2024, at Longfu Service Area (northbound) of G55 Second Guangzhou Expressway
The FST white to black overlay on the cement road surface of the truck parking area was implemented on the same day at a temperature of 14-26 ℃. The truck parking area is located at a length of 21 meters and a width of 3.2 meters, with a total area of approximately 64 square meters.
2、 Treatment measures for cement concrete pavement defects in the original truck parking area
(1) For areas where the smoothness of the cement pavement is insufficient, precision shot blasting is used for leveling treatment.
(2) Perform joint filling treatment on the cut joints, seams, and other cracks of cement pavement.
(3) A layer of composite modified asphalt lotion shall be sprayed as the bonding layer 1 hour before paving.
(1) Pavement structure: First lay the first layer of 3-5mm single particle size diamond sand aggregate on the original cement concrete pavement.
(2) Paving process: the paving construction uses a special new type of synchronous fiber sealing vehicle to pave the emery aggregate, special cementitious lotion, water, cement, additives and other materials at a uniform speed according to the design proportion.
(3) 10 minutes after the completion of the first layer of 3-5mm paving, the rubber roller is used to roll and shape it in one go. 20 minutes later, the second layer of bonding material is sprayed, and 2-3mm diamond sand is spread. The surface layer of bonding material is sprayed and the rubber roller is used to roll and shape it.
4、 FST white to black coating construction technology and plan
(1) Construction preparation
1. Climate requirements
1> Construction is not allowed when the temperature reaches 15 ℃ and continues to decrease, but construction can be carried out when the temperature reaches 15 ℃ and continues to rise;
2> Construction cannot be carried out until the road surface is dry or cleared of water after rain;
3> If there may be rainfall during the construction and maintenance period, construction cannot be carried out;
4> The temperature during the curing and molding period is greater than 15 ℃.
2. Equipment and manpower
1> Organize specialized teams for construction
2> Before construction, a comprehensive inspection and debugging of all types of machinery used for construction must be carried out to ensure that they are in good condition before construction can begin. Important spare parts for mechanical equipment are also required.
3> The construction of FST white to black overlay super adhesive wear layer should fully consider climate factors.
4> Usually, calibration of the mechanical measurement and control system is required in the following three situations: first, before the first use of the machinery upon arrival; Secondly, the machine is calibrated every six months for continuous production; Thirdly, when there is a significant change in the mix proportion of raw materials, the calibration method should refer to the manufacturer's product manual.
(2) Treatment of the condition of the original old cement concrete pavement
The original road surface should be pre treated before construction. Common pavement damage repair: Develop effective treatment measures based on the characteristics and causes of different damages, timely eliminate quality hazards and prevent the expansion of damages, thereby ensuring the quality and durability of the pavement.
(3) Construction process of FST white to black coating layer
1. The following preparations should be made before construction
(1) The original road surface should be pre treated before construction. Common road surface damage repair; Develop effective treatment measures based on the characteristics and causes of different diseases and damages, timely eliminate quality hazards and prevent the expansion of diseases, thereby ensuring the quality and durability of road surface use.
(2) Before construction, a comprehensive inspection and debugging of all types of machinery used for construction must be carried out to ensure that they are in good condition before construction can begin. Important spare parts for mechanical equipment are also required. Usually, the calibration of the mechanical measurement and control system is required in the following three situations: first, before the first use of the machinery on site; Secondly, mechanical continuous production is calibrated every six months; Thirdly, when there is a significant change in the mix proportion of raw materials, the calibration method should refer to the manufacturer's product manual.
(3) Construction shall not be carried out when the temperature is below 15 ℃. Construction shall not be carried out when the temperature reaches 15 ℃ and continues to rise. Construction can be carried out when the temperature reaches 15 ℃ and continues to rise; Construction cannot be carried out before the road surface is drained or cleared of water after rain; During the construction and maintenance period, there may be rainfall and construction cannot be carried out; The temperature during the curing and molding period must be above 15 ℃.
2. The construction shall be carried out according to the following steps:
(1) Traffic closure shall be carried out on the construction section first: Prior to construction, contact the traffic management department of this section and jointly develop a traffic control coordination plan to ensure sufficient maintenance and shaping time after construction. Corresponding measures shall be taken to minimize the impact of construction on traffic, and sufficient construction safety signs shall be set up in accordance with the traffic evacuation plan and safety regulations.
(2) Road surface cleaning of construction sections: Firstly, organize cleaning personnel to clean the enclosed required construction sections, remove all debris and soil from the road surface, and blow them clean with a hair dryer. For the mud cake pasted on the original road surface, first use an iron shovel to remove it, and then repeatedly brush it clean with a steel brush. For the parts of the original road surface contaminated with grease, first clean them with a cleaning agent, and then rinse them with water. The cleaned road surface should be dry, clean, dust-free, free of accumulated water, and pollution-free. The cleaned road surface is strictly closed to traffic, prohibiting pedestrians and vehicles from walking together to ensure construction quality.