微型狄法尔测定仪

DFR-2微型狄法尔测定仪

一、 仪器简介

DFR-2型狄法尔磨耗试验机可以测量出石料的耐磨强度。对于一些石料，这种耐磨强度在干燥和含水的情况下是不同的。主要用于石料的磨耗率试验，也就是抗摩擦、抗冲击，为鉴定集料品质的指标。此标准适用于欧标、法标NF P18-572等相关标准。

二、 主要结构

本机主要有滚筒、密封盖、支架、变速箱、电机、控制器等部份所组成。

三、 仪器特点

它包括有四个一端封口的空心圆筒，对于粒度介于 4 至14 毫米之间的粒料，圆筒内直径为 200±1 毫米，有效长度为154±1 毫米。圆筒为不锈钢材质(Z 2 CN 18-10), 厚度不小于3 毫米。它们被安装在两条水平轴上。每个圆筒可以用于一个试验。圆筒内部不能存在任何由于焊接或固定方式引起的隆突不平。用8 毫米厚的平盖来封闭圆筒。通过平盖上的接缝来确保密封性。磨料由直径为 10±0.5 毫米的不锈钢圆形滚珠组成 Z 30 C 13。使钢珠通过两个间距为 9.5 毫米的平行棒，或者以10 个用过的滚珠为一组称量其质量，该质量不能够小于34 克，由此快速地检查滚珠的直径。一个电动机(大约1 千瓦)，它必须确保圆筒以100tr/min±5 tr/min 的速度匀速旋转。一个在试验结束时可以自动中断发动机运转。

四、 技术参数

1 、试桶直径：200±1mm

2 、试桶长度：154±1mm

3 、电压：220v

五、 使用方法

1 、量取试样：4-14mm粒料量取500±2g。

2 、将试验用圆柱体开口向上放置，加入磨料，倒入量取的试样，加入2.5L水。

3 、设定试验机为2小时，按启动键。

4 、待试验机停止工作后，将集料和磨料收集到容器中，小心避免集料的丢损。细心使用洗涤瓶清洗圆柱体内部，收集水和遗留的矿物质。

5 、用1.6mm的滤筛清洗容器的材料，磨料将会被8mm的滤筛留住。使遗留物沥干，并在105℃的烘箱烤干，直到总质量稳定。

6 、称量干燥后的遗留物。称量值为m’

7 、DFR-2型狄法尔磨耗试验机计算：

根据定义，微的瓦尔系数或为以下关系式：

这里：

M 为试验用试件干燥时总量（500克）；

m = M – m’为通过测试的通过1.6毫米滤筛的材料的总量。 

DFR-IIDeval Abrasion Testing Machine

1、 Brief introduction of instrument

DFR- type IIdeval machine can measure the abrasion strength of stone. For some stone materials, the wear resistance is different in the case of dry and water cut. It is mainly used for the wear rate test of stone material, that is, anti friction and impact resistance, which is the index of identifying the quality of aggregate. This standard is applicable to standards such as European standard, standard NF P18-572 and other related standards.

2、The main structure

This machine mainly consists of roller, seal cover, support, gearbox, motor, controller and so on.

3、The characteristics of the instrument

It comprises a hollow cylinder four side seal, the granularity between 4 to 14 mm pellets, cylinder diameter of 200 + 1 mm, the effective length is 154 + 1 mm. The cylinder is made of stainless steel (Z 2 CN 18-10) with a thickness of less than 3 mm. They are mounted on two horizontal axes. Each cylinder can be used for an experiment. There are no bulge irregularities caused by welding or fixing in the cylinder. Closed cylinder with 8 mm thick flat cover. The seal is secrecy by the joint on the flat cover. The abrasive consists of Z 30 C 13 stainless steel round balls with a diameter of 10 + 0.5 mm. The steel ball can be weighed through two parallel rods with 9.5 mm spacing, or the weight of the 10 balls that are used should be weighed. The quality can not be less than 34 grams, so that the diameter of the ball can be quickly checked. An electric motor (about 1 kW), which must ensure that the cylinder rotates at a speed of 100tr/min + 5 tr/min. One can automatically interrupt the engine operation at the end of the test.

4、 Technical parameters

1. The diameter of the test bucket: 200 + 1mm

2. The length of the test bucket: the length of the 4-14mm test barrel is 154 + 1mm, and the length of the 25-50mm test barrel is 400 + 2mm.

3, voltage: 220V

5、Methods of use

1. Sample sample: 4-14mm grain amount is 500 + 2G.

2, the test is placed on the cylinder, adding abrasive, into the sample and adding 2.5Lwater.

3, set the test machine for 2 hours, press the start key.

4. After the test machine stops working, collect the aggregate and abrasive in the container, and carefully avoid the loss of the aggregate. Carefully use a washing bottle to clean the inside of the cylinder and collect water and the minerals left over.

5, use 1.6mm filter screen to clean the material of the container, the abrasive will be retained by the 8mm filter screen. The remnants of the drain, and dried in the oven 105 degrees, until the total quality is stable.

6. A remnant after being weighed and dried. The weighing value is m '

7. Calculation:

According to the definition, the Wahl coefficient of the micro 

or the following relation is:

Here：

M was the total amount of drying (500g) for test specimens.

M = M - M 'is the total amount of material passed through 1.6 millimeter filter through test