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杠杆压力仪

杠杆压力仪,公路土工试验仪器

 

杠杆压力仪是专业检测仪器适用于在室内对细颗粒土或粒径20㎜以下的级配集料试件进行回弹模量测定。试件在一定载荷的作用下产生变形,卸去载荷,变形恢复,但载荷大于试件的弹性变形时产生塑性变形,本仪器采用杠杆法对试件进行加荷,卸荷试验,以得到试件的 回弹试模和塑限值。

The soil-based rebound modulus tester is a professional testing instrument. It is suitable for indoor elastic modulus determination of fine-grained soil or graded aggregate specimens with a particle size of 20 mm or less. The test piece is deformed under the action of a certain load, the load is removed, and the deformation is restored, but the load is greater than the plastic deformation of the test piece. The instrument uses the lever method to load the test piece and unload the test to obtain the test. Rebound test and plastic limit of the piece.

 

杠杆压力仪技术参数:
★承载板面积:
Φ25.2mm-5cm2
Φ37.4mm-11cm2
Φ50.5mm-20cm2 
★杠杆比: 10:1

外形尺寸:450X350450mm

重量:20kg

Technical parameters of soil-based rebound modulus tester:
★ Carrying board area:
Φ25.2mm-5cm2
Φ37.4mm-11cm2
Φ50.5mm-20cm2
★ leverage ratio: 10:1
★Dimensions: 450X350450mm
★ Weight: 20kg

 

杠杆压力仪操作规程:
★试料的准备:如试料为粗颗粒的级配集料,则筛取试料中直径大于20mm的颗粒,如200mm以下的集料的颗粒组成不符合级配要求,则添加所缺粒料,使达到级配要求。   
★击实试验:按击实试验法测定材料的A佳含水率和A大干容量,并绘制含水量.干容重关系图。   
★制试件,对于路基土做3---4组击实功能不同的试件。  

例如:击实功能分别为5.62Kgcm/C㎡(相当于轻型击实仪实验法)12.5Kgcm/Cm,19.5Ggcm/Cm左右的试件,每组6---7各点,利用试件作回弹试模试验。   
★对于路面材料,参照承载比试验法制作方法制取试件,同一试件作2—4个,其中一半进行泡水测膨胀量,然后一起进行逐级载荷试验(即测{a}1211{/a})。
Soil-based rebound modulus tester operating procedures:
★Preparation of sample: If the sample is a grading aggregate of coarse particles, the particles with a diameter greater than 20 mm in the sample are taken, and if the particle composition of the aggregate below 200 mm does not meet the grading requirements, the missing particles are added. Material, so that the grading requirements are met.
★ Compaction test: Determine the A good moisture content and A large dry capacity of the material according to the compaction test method, and draw the water content and dry weight relationship diagram.
★ Test pieces, for the subgrade soil to do 3---4 sets of different test pieces.
For example, the compaction function is 5.62Kgcm/cm2 (equivalent to the light compaction test method), the test piece of 12.5Kgcm/cm, 19.5Ggcm/cm, each group of 6--7 points, using the test piece Rebound test test.
★ For the pavement material, refer to the bearing ratio test method to prepare the test piece. The same test piece is made into 2-4 pieces, half of which are used for measuring the expansion amount of the bubble water, and then carry out the step-by-step load test together (ie, measuring {a}1211{ /a}).

 

杠杆压力仪使用说明:
★选定承载板上的单位压力   
1、对于计算含水量大于塑性的 土基层用0.5—10kg/平方厘米   
2、对于计算含水量小于塑限的 土基层用1.0-2.0kg/平方厘米   
3、对于地基层材料用,5—7Kg/平方厘米   
★将带试筒的式样倒置在仪器的地板上,安放直径约为试筒四分之一的承载板:调平杠杆,使砝码的一端略翘上,并安置百分表   
★预压:先计算的A大荷载对试件1-2次,卸荷预压试验,在试验过程中,进一步调整承载板的位置,承载板与试样表面的接触,杠杆的高低,并调整百分表的指针指零,并使百分表预压1mm。   
★测回弹变形:将计算好的预定的单位压力分为4—6等份,作为每次加荷的数量(A后一次加荷可略大于预定的计算总压力)   
Soil-based rebound modulus tester instructions:
★Select the unit pressure on the carrier board
1. For the calculation of water content greater than plastic, the base layer should be 0.5-10 kg/cm 2
2. For the calculation of water content less than plastic limit, the soil base layer is 1.0-2.0kg/cm 2 .
3. For foundation materials, 5-7 Kg/cm 2
★ Invert the model with the test tube on the floor of the instrument and place the bearing plate with a diameter of about one quarter of the test tube: level the lever so that the end of the weight is slightly tilted and the dial gauge is placed.
★Preload: First calculate the A load to the test piece 1-2 times, unloading preload test, during the test, further adjust the position of the load plate, the contact between the load plate and the sample surface, the height of the lever, and Adjust the pointer of the dial indicator to zero and pre-press the dial gauge by 1 mm.
★Measure the rebound deformation: divide the calculated unit pressure into 4-6 equal parts, as the amount of each load (A post-loading can be slightly larger than the predetermined calculated total pressure)

 

 

 

 

 


杠杆压力仪

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