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Roller knowledge of encyclopedia

Time: 2019-02-10 Category: Technical Data Tag: roller
Summary: Roller is a professional engineering machinery and equipment, most people only know one of the other. However, such a common mechanical equipment, how can we turn a deaf ear to it? Lucia Heavy Industries Xiaobian understand some of the knowledge about the roller into this article, I hope everyone on the roller have a better understanding.
Roller is a professional engineering machinery and equipment, most people only know one of the other. However, such a common mechanical equipment, how can we turn a deaf ear to it? Lucia Heavy Industries Xiaobian understand some of the knowledge about the roller into this article, I hope everyone on the roller have a better understanding.

1. What is the definition of roller?


A: The roller is a method of using mechanical self-weight, vibration, repeated loading of the compacted material to overcome the cohesion and friction between the material, excluding the internal gas and moisture, forcing the displacement of the material particles , Wedges each other to increase the density, so that it reached a certain degree of density and flatness of the operating machinery.

2. What are the factors that affect the compaction effect?


A: The factors that affect the compaction effect are: 1, the material being pressed and its grading; 2, water content; 3, compaction energy and construction methods.

3. Rollers road roller compaction, according to what order rolling?


A: The compaction operation of roller compaction should be based on the subgrade and pavement centerline, starting from the left and right sides of the line starting from the pressure to the center line (roller length in the longitudinal run once for each trip), until the main road roller pressure to the center line , The last in the road pressure those who did not press the main wheel pressed to the place where "first two sides, after the middle"
.
4. Static roller compaction principle is what?


A: The static roller is the principle of static compaction, the use of rollers to run their own roller was pressed material repeated rolling machine. The static pressure generated by the weight and load of the roller directly acts on the pavement so that the solid particles of the pressed material such as the soil are closely abutted with each other to form an integral structure with certain strength and stability. That is, the static pressure generated by the mechanical gravity to complete the compaction work.

5. What is the principle of vibration compaction?


A: The principle of vibration compaction is the use of mechanical self-weight and the excitement generated by the exciter to force the compacted material vertically forced vibration, sharply reduce the internal friction between soil particles, so that the particles close to increase the density , So as to achieve the purpose of compaction.

6. Vibratory roller compaction principle is what?


A: Roller wheel along the compacted surface to do reciprocating rolling, while using eccentric mass M rotation excitation force (with a certain frequency, amplitude vibration), so that the layer being pressed simultaneously by the roller wheel static pressure and vibration force The combined effect of short duration of the material to impose a pulsed impact.

7. In the construction of highways, subgrade soil and pavement should be carried out layer by layer compaction, compaction purpose is what?


A: Subgrade soil compaction aims to reduce the soil gap, increase soil compaction, improve subgrade compressive strength and stability, so that it reaches the specified carrying capacity; pavement compaction is to increase the pressure of the material The density of the compacts to achieve the required degree of compaction to resist the dynamic effects of objects such as vehicles traveling on it and the erosion of rain and snow.