Jinan water stabilized material is the abbreviation of cement stabilized macadam. Cement stabilized macadam uses graded macadam as aggregate, uses a certain amount of cementitious material and sufficient mortar volume to fill the gap of aggregate, and paves and compacts according to the principle of inlaying. Its compactness is close to compactness, and its strength mainly depends on the principle of inlaying and locking between crushed stones, and there is enough mortar volume to fill the gap of aggregate.
Its initial strength is high, and its strength increases with age and quickly forms a plate, so it has high strength, good permeability and frost resistance. The cement content of cement stabilized macadam is generally 3%~6% of the mixture, and the unconfined compressive strength in 7 days can reach 5.0Mpa, which is higher than other subgrade materials. The cement stabilized macadam is not muddy in the rain and has a solid surface after survival. It is an ideal base material for high-grade pavement.
The construction process of water stabilized pavement base can be summarized as "one key point, two links, three sections and eight processes". That is, to grasp the key point of "mix ratio", to comprehensively and effectively control the two links of "mixing plant and construction site", the three sections of "paving area, compaction area and shaping area" of the construction site, and the eight processes of "construction preparation → construction setting out → mixing → transportation → paving and leveling → rolling → shaping cover → watering curing and traffic control".
According to the regulations, cement-stabilized macadam belongs to medium-grained soil. Since cement and other cementitious materials are included in the water stability, the whole construction process is required to be completed before the final setting of cement and meet the quality standard at one time, otherwise it is not easy to repair. Therefore, during the construction, it is required to strengthen the construction organization design and plan management, increase the sense of urgency and responsibility of the on-site construction personnel, speed up the construction progress, increase the degree of mechanized construction, and improve the mechanical efficiency. The construction method of water stabilization is also in line with the development direction of modern large-scale mechanization. Therefore, the application of water stabilization in municipal engineering will be rapidly promoted.
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