杠桿壓力儀是專業(yè)檢測儀器。適用于在室內(nèi)對細顆粒土或粒徑20㎜以下的級配集料試件進行回彈模量測定。試件在一定載荷的作用下產(chǎn)生變形，卸去載荷，變形恢復(fù)，但載荷大于試件的彈性變形時產(chǎn)生塑性變形，本儀器采用杠桿法對試件進行加荷，卸荷試驗，以得到試件的 回彈試模和塑限值。

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.

杠桿壓力儀技術(shù)參數(shù)：
★承載板面積：
Φ25.2mm-5cm2
Φ37.4mm-11cm2
Φ50.5mm-20cm2
★杠桿比： 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

杠桿壓力儀操作規(guī)程：
★試料的準(zhǔn)備：如試料為粗顆粒的級配集料，則篩取試料中直徑大于20mm的顆粒，如200mm以下的集料的顆粒組成不符合級配要求，則添加所缺粒料，使達到級配要求。 　　
★擊實試驗：按擊實試驗法測定材料的A佳含水率和A大干容量，并繪制含水量.干容重關(guān)系圖。 　　
★制試件,對于路基土做3---4組擊實功能不同的試件。 　

例如：擊實功能分別為5.62Kgcm/C㎡(相當(dāng)于輕型擊實儀實驗法)12.5Kgcm/Cm,19.5Ggcm/Cm左右的試件，每組6---7各點，利用試件作回彈試模試驗。 　　
★對于路面材料，參照承載比試驗法制作方法制取試件，同一試件作2—4個，其中一半進行泡水測膨脹量，然后一起進行逐級載荷試驗(即測{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}).

杠桿壓力儀使用說明：
★選定承載板上的單位壓力 　　
1、對于計算含水量大于塑性的 土基層用0.5—10kg/平方厘米 　　
2、對于計算含水量小于塑限的 土基層用1.0-2.0kg/平方厘米 　　
3、對于地基層材料用，5—7Kg/平方厘米 　　
★將帶試筒的式樣倒置在儀器的地板上，安放直徑約為試筒四分之一的承載板：調(diào)平杠桿，使砝碼的一端略翹上，并安置百分表 　　
★預(yù)壓：先計算的A大荷載對試件1-2次，卸荷預(yù)壓試驗，在試驗過程中，進一步調(diào)整承載板的位置，承載板與試樣表面的接觸，杠桿的高低，并調(diào)整百分表的指針指零，并使百分表預(yù)壓1mm。 　　
★測回彈變形：將計算好的預(yù)定的單位壓力分為4—6等份，作為每次加荷的數(shù)量(A后一次加荷可略大于預(yù)定的計算總壓力) 　　
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)