A Brief Talk on Asphalt Foundation Construction with Modified Asphalt

Upload time :2022/7/19 8:58:51

There are two types of ordinary asphalt service modified asphalt for the base layer: semi-rigid layer, including cement stability, lime stability, lime industry slag stability, etc. Other categories include soft matrices including granular matrices such as granular (gravel) rock, barriers (eg silt gravel, embankments) and asphalt pellets. This is a good example.


Construction of Lower Semi-rigid Base

Semi-rigid base, also known as stabilized soil, is formed by mixing appropriate amounts of inorganic compounds (cement, lime, industrial waste, etc.) with water, agitated, compacted and injected into soil or unsaturated soil (including various coarse-grained, medium-grained, etc.) and fine-grained soils). The construction method of semi-rigid base is divided into road mix and factory mix. This is a good example.


1. Road mixing project

Road mixers are widely used in construction machinery: powder spreaders, soil stabilization mixers, bulldozers, graders, loaders and road rollers. This is a good example.


(1) Preparation for road construction. Lower level acceptance, road inspection, pile inspection, prefabricated elements; this is a good example.


2) Put in a tray. Before paving, the soil should be moistened and watered. The road surface should be level and surround the road arches. Check that the loose thickness of the paving layer is acceptable, and water it; this is a good example.


(3) Stacked in trays. There should be no gaps or excessive charge concentration after stacking on the surface of the unit; this is a good example.


4) Pour in and stir. A special stabilized soil mixer should be used for mixing, and its depth should reach the bottom of the layer, and it should penetrate the bottom of the layer by 5-10mm to facilitate bonding up and down. It is strictly forbidden to leave a simple soil layer in the mixed layer and the bottom of the layer. Agricultural rotary agricultural machines can be used to mix with multiple plows or graders or serrated disc modified asphalt harrows and multiple plows or graders in the absence of a special mixing mechanism for stabilizing the medium to fine grained area. This is a good example.


Each mix must overlap by 10 to 20cm when both sides go into the middle to prevent mix leaks. If the mixture contains a small amount of water, use the nozzle water to make up the water and do a wet mix. The mixed color must be the same as the mixed color, without gray streaks, gray surfaces, and colored surfaces. This is a good example.


(5) Chastity. Immediately after mixing well, use a grader to pre-process the straight sections, with the grader entering the center of the road from both sides; the layer curve equalizer should be embedded outside. In the early stages of road grading, a tractor, motor grader or tire roller can be used to quickly detect possible unevenness. Each type is rolled and bent as specified, with special attention to the flatness of the weld. This is a good example.


(6) Press. Grinding is performed within a maximum humidity range of ±1%, and the tightness is within specification.


1) Various stable soil structure layers are used for crushing of rollers over 12 tons. When crushing on a 12-15t three-wheel road roller, the compressed thickness of each layer should not exceed 15cm; 18-20t three-wheel road roller should not be more than 20cm; this is a good example.


2) On a straight line, from the curb to the center; on a flat curved strip, from the inside of the road edge to the outside of the road edge; this is a good example.


(3) When rolling, 1/2 of the wheel width should overlap, and the rear wheel should overlap at the intersection of two or more parts, that is, if the rear wheel presses down the entire width of the cover, it usually needs to overlap 6-8 times. Runners should run twice at a pace of 1.5 to 1.7 km/h, then travel 2.0 to 2.5 km. This is a good example.


4) Before finishing embossing, the grader should be re-aligned to the longitudinal arrangement, dome and height required by the design. Finally, if necessary, when shaving and cleaning the outlet, it should be partially turned up; in local lowlands, do not replenish the material, but when laying the upper layer. This is a good example.


7) Seam processing. After the first stage mixing is completed 5-8m to the final construction stage, there is no torsion

(8) Nutrition. Keep moist for at least seven days. Once the concrete has stabilized in the mix, it must be fed immediately and crushed on the second or third day after completion.


2. Factory production


Factory mixers are used for centralized mixing and filling in factories. The practice shows that the application of factory mixers can improve the quality of the project and speed up the progress of the project, so the conditions should be as good as possible. After paving, the road is paved, rolled, repaired and mixed.

If you have any other questions, please contact modified asphalt us for details or contact us directly.


Company website:www.modifiedasphalt.net




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