Rock crushing practice on reformation style road

Rock crushing practice on reformation style road

Gravel of the construction process called lithotripsy technology, cement concrete pavement is broken into concrete blocks, broken from top to bottom material from small to big, broken face, broken particle size range within the range of 30 ° to 60 ° for the 2.5cm ~ 40cm Most of 2.5cm to 7.6cm, particle size greater than 20cm content shall not exceed 2%.
The technology is old cement concrete pavement panels, one-time broken occlusal inlay crowded fragments flexible structure, can take full advantage of the residual strength of the old road, and protect the environment, conserve resources through special equipment. The primary structure not only has a certain carrying capacity, but also to prevent or limit the heat of the newly paved asphalt concrete pavement reflection crack occurred, the development of the role of the broken particle size range 2cm40cm mechanical mode tends to be graded gravel. The strength of the rubble of technology to the formation mechanism of cement concrete pavement gravel into the surface of fine-grained bulk layer, gravel layer upper and gravel of the lower part of the three levels.
Gravel upper layer thickness of about 10cm, the strength of: First, from the friction angle, particle size the greater the greater the internal friction angle; from prestressed cement concrete panels in broken concrete side volume expansion, the smaller the particle size of the concrete particles, the greater the expansion trend, the greater the resulting prestress.
The lower part of the crushed stone layer thickness of about 10cm, "cracked but not broken, a good fit, interlocking occlusal" block structure. The structure is statically determinate and homeostasis, the concrete manifestation of the various forms of occlusal beam, arch structure under external force, the role of occlusal inlay crowded than the regular role of interlocking, the higher the strength, with better structural stability characteristics.
The rubble of the main features of the old cement concrete pavement crushed stone has the following characteristics: crushed stone can make the original cement concrete blocks uniform intensity distribution in the plane; the rubble of a certain intensity to retain the original cement concrete pavement; Rubblization can eliminate the original cement concrete pavement; the rubble after the particle size is reasonable, does not produce stress concentration. Through the broken old cement concrete pavement structural strength reduced to a certain extent, to prevent the occurrence of reflective cracking overlay of asphalt concrete, at the same time to achieve a good balance of both the structural strength and reflective cracking.
 

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