Asphalt Horseshoe Asphalt Pavement

• Posted by Mavis Chai October 15, 2022 Filed in Arts & Culture #Asphalt Mixing Plant  51 views
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  It refers to the road surface that is made of asphalt mastic mixture as a surface or anti-slip layer.

  Asphalt horseshoe fat crushed stone mixture (SMA) is a kind of anti-slip surface layer with large structure depth formed by mixing, spreading and compaction with asphalt horseshoe fat composed of modified asphalt, mineral powder and lignocellulose as binder based on discontinuous gradation.

  

  It has the advantages of anti-slip and wear resistance, small porosity, fatigue resistance, high temperature resistance to rutting and low temperature resistance to cracking. It is a new material that comprehensively improves the quality of dense graded asphalt concrete. It is suitable for the surface layer of highways, first class highways and other important highways. Clink this site for how to produce asphalt.

  Modified asphalt SMA pavement has been recognized as the most cost-effective asphalt pavement structure, and has been popularized and applied in more than 20 provinces, municipalities and autonomous regions in China. Nowadays, SMA has become one of the main pavement structure forms of highway in our country, and it is the preferred structure form of large traffic volume, heavy haul traffic road or important freeway.

  Local SMA pavement

  SMA is a kind of asphalt mixture composed of asphalt, fiber stabilizer, mineral powder and a small amount of fine aggregate. It is filled by asphalt, fiber stabilizer, mineral powder and a small amount of fine aggregate. The mixture has the following characteristics:

  The coarse aggregate is mostly in the composition of SMA, and the ore is discontinuous gradation. The coarse aggregate accounts for more than 70%, and the coarse aggregate has a good intercalation effect between the particles. Asphalt mixture produces very good resistance to load deformation ability, even under high temperature conditions, when the viscosity of asphalt horseshoe grease decreases, the influence of this resistance ability will not be reduced, so it has strong high temperature resistance to rutting ability.

  The amount of mineral powder and asphalt is high. The amount of mineral powder used by SMA is up to 8% ~ 12%, and the amount of asphalt is up to 5.7% ~ 6.5%, which is about 1% higher than that of general AC-13/AC-16. To use fiber for stabilizing agent at the same time, the composition of asphalt hoof fat wrapped in coarse aggregate surface, fully filling aggregate clearance, contraction deformation in temperature drop, mixture, hoof fat has good bonding effect, its tenacity and flexible deform the mixture has good low temperature performance, low temperature crack resistance are improved greatly. Visit this site (https://lutonmachinery.com/asphalt-plant-for-sale/) for asphalt plant list.

  The internal void of small SMA mixture is very small (3% ~ 4%), little or almost no water seepage of the mixture, the water inside the mixture is capillary water form, not easy to become a large dynamic water, coupled with Ma hoof fat and aggregate bonding force is good, the water stability of the mixture is also more improved.

  At the same time, because of the good water tightness, the asphalt layer and the base has a strong protective effect and water insulation effect, so that the road surface can maintain a higher overall strength and stability.

  The surface of the road is rough, the depth of the structure is large SMA on the one hand requires the use of hard, wear-resistant high quality stone; On the other hand, the ore adopts intermittent gradation, the coarse aggregate content is high, the surface of the road is formed after compaction, the structure depth is large 0.8~1.3mm, so that it is not easy to produce water drift under the high-speed driving in rainy days, the skid resistance is improved, and the contradiction between skid resistance and durability is better solved. At the same time, rain traffic will not produce large water mist and splash, road noise can be reduced by 3 ~ 5dB, so as to comprehensively improve the surface function of the road.

  The mixture of SMA with good durability is fully filled with asphalt horseshoe grease, small void ratio, less contact between asphalt and air, asphalt aging is reduced, so the durability of asphalt mixture is good.