Asphalt pavement in the traffic load and the impact of climate, with the passage of time, road conditions and service capacity will gradually deteriorate, in order to prevent the early destruction of pavement, extend the service life of the pavement, Kongtong segment using asphalt gravel synchronous sealing technology Preventive maintenance of highway pavement. The technology is synchronized in the same second sprinkling asphalt and spreading aggregate, so that between them with the largest surface covering strength. The molding seal has the characteristics of anti-slippery, anti-rutting, anti-abrasion, anti-seepage and so on. It can effectively cure the pavement turtles, crack, slight wave and so on. And the construction technology is simple, fast and reliable. Through the observation on the construction of the synchronous gravel seal on the section of the National Highway 312, the K1764 + 000-K1766 + 000 and the K1791 + 600-K1792 + 600 synchronous gravel seal, if the construction quality control process, the process control is not strict, Not close, a direct impact on its sealing effect, it is necessary to do a discussion of its quality control.[url=http://smallroadroller.com]Small Road Roller - Shanghai Doan Machinery Technology Co.,Ltd[/url]

Quality control of raw materials
Asphalt binder
Asphalt crushed stone synchronous seal is the most commonly used 90 # and 110 # ordinary road petroleum asphalt, asphalt binder should be consistent with "highway asphalt pavement construction technical specifications" (JTGF-2004) the relevant provisions and technical requirements.
gravel
The gravel is a single-graded aggregate with clean, dry, non-weathering, non-impurity, regular shape and sufficient strength and abrasion resistance to be crushed and processed by counterattack (hammer type). The needle-like stone in 15%, without impurities and stone powder, dust content of not more than 1%, crushing value of less than 20%. From last year to sum up the Kongtong section in the custody of the National Road 312 line Amaranth section, County Road 049 Pinghua Road, using a step-by-step asphalt gravel seal results obtained in the traffic load of heavy sections of gravel specifications , With 2-5mm, 6-10mm implementation of the paragraph, the original pavement serious cracks in the crack after the formation, with the passage of time, the cracks will continue to be reflected. But also in the paragraph with large amounts of asphalt, prone to oil packets and caused by the passage; in the amount of moderate asphalt individual paragraphs, asphalt binder and crude oil surface in the process, the high temperature of crude oil caused by soft surface,
The specifications of the gravel is not ideal. To this end, in the asphalt crushed stone seal layer, I took the lead in the use of 10-14mm, 10-20mm gravel, as this year's asphalt crushed stone synchronous seal used to provide a reference gravel specifications. Of course, for high-grade highway asphalt concrete pavement turtle crack, out of stars and other diseases using asphalt gravel synchronization seal construction, easy to do in the construction of pre-test section of optional gravel specifications, 5-10mm for reference.
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