Prevention and Treatment of Crack Disease in Road

[qizhen0809]

<p>Road cracks Because of the current structure of the grass-roots form (strong base thin surface) and the choice of materials and the impact of climate is inevitable,Cheap Power Road Grooving Machine but there should be timely and effective crack management, and prevent the development of road cracking, pit Troughs and fragmentation and other serious diseases.</p>
<p>The main purpose of governance is to prevent rain and snow water into the seam, the cracks sealed, usually called irrigation joints. The method of treatment has been used in the past 40-70 hot asphalt filling, in recent years, there are many units with emulsified asphalt grouting, filling material is a liquid material, can be poured into the depths of cracks, emulsified asphalt poured after breaking Milk, water evaporation,high tech asphalt crack sealing equipment the original filled with cracks appeared some gap, after 6-10 times repeated filling until filled. But the transverse cracks across the bridge through, whether the use of hot asphalt or emulsified asphalt are not desirable, the infiltration of the bitumen along the gap has been dripping to the bottom of the lower structure of the pollution. Therefore, it is recommended to use hot-melt sealant for filling joints (such as "road fighters"), so that not only can guarantee the waterproof performance of the road, and thus prevent unnecessary pollution, the cost of about 11 yuan / m.</p>
<p>The use of hot melt sealant for processing cracks can be divided into the following situations:</p>
<p>1, slit width of 5 mm below the length of less than 1 m and the bending is not straight cracks, the proposed polymer anti-crack paste paste directly paste;</p>
<p>2, for the slit width but to bend the cracks, it is recommended to use portable wheel cutting machine for expansion joints;</p>
<p>3, for the slit width of the larger straight but to the cracks, you can use a professional slot machine for expansion joints to improve work efficiency.</p>
<p>The following crack on the use of grooving process to make a brief introduction of repair, slot grouting method of construction work processes, technical points and precautions are as follows:></p>
<p>1, slotting: slotting machine saw blade should be adjusted to the appropriate height to ensure that the cutting depth of 1.5-2cm or less, the slot must be along the cracks to the direction of the slit, the slot should maintain a regular shape.</p>
<p>2, slotting: grooved slot should be carried out after the slot joint treatment, it is best to use the blower and wire brush with the slot of the dust and loose pieces of clean up to improve the cohesive force.</p>
<p>3, drying trough: If necessary,Aging asphalt pavement repair car prices flame guns to be used to bake the slot, the attention of the baking temperature control, generally not more than 70 ℃.</p>
<p>4, preparation: Sealant heating temperature should be controlled at between 200 ℃ -210 ℃, the material temperature should be higher than 180 ℃, the temperature is too high or too low to deal with adverse effects.</p>
<P>5, irrigation glue: colloid pouring should control the direction of a good filling machine, in the irrigation of the first time after 5 minutes to conduct a leveling grouting, and the formation of T-seal surface crack layer. Colloid should be slightly higher than the road surface (0.5-1 mm), low temperature season, the colloid should be slightly lower than the road (0.5-1 mm), the colloid should be slightly higher than the road (0.5-1 mm).</P>
<p>6, open traffic: After the opening of the construction time is generally 30min after the traffic, but if the colloid surface sprinkle with sand or stone powder, to prevent open traffic after the wheel to take the filling material, so about 10 minutes to open the traffic.></p>
<P>7, Prohibited in the wet road or the temperature below 4 ℃ environment construction, otherwise it will reduce the adhesion of the sealant, easy to fall off, affecting the construction quality.</P>
<p>The new process of slotting grouting for cracks in asphalt concrete pavement not only improves the sealing effect of asphalt concrete pavement, but also improves the effective sealing life and the service life of pavement. It is a better way of pavement maintenance.</p>

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