7/24/2012

Determination of Fractured Particles 破碎面颗粒测定实验步骤

 

8. Procedure 实验步骤

8.1 Wash the sample over the sieve designated for determination of fractured particles to remove any remaining fine material, and dry to constant mass. Determine the mass of the test sample, and any subsequent determinations of mass, to the nearest 0.1 % of the original dry sample mass.

用指定的筛子清洗试样,去除残留的细小试样,烘干至恒定重量。称重,精确至原试样干重的0.1%

 

8.2 Spread the dried test sample on a clean flat surface large enough to permit careful inspection of each particle. To verify that a particle meets the fracture criteria, hold the aggregate particle so that the face is viewed directly. If the face constitutes at least one quarter of the maximum cross-sectional area of the rock particle, consider it a fractured face.

将干燥试样平摊在干净整平且足够大的表面上,这样可让实验员对试样逐个检查。

破碎面的确定:握住集料颗粒,这样可以直观的检查颗粒表面。

如果表面包涵至少四分之一颗粒最大横断面积,则可认定为一个破碎面。

 

8.3 Using the spatula or similar tool separate into two categories: (1) fractured particles based on whether the particle has the required number of fractured faces, and (2) particles not meeting the specified criteria. Use Figs. 2-7 to aid in this determination. Be aware that some of the particles in Figs. 2-4 do show more than one fractured face. If the required number of fractured faces is not given in the applicable specifications, the determination will be made on the basis of a minimum ofone fractured face.

用抹刀或类似工具将其分为两类:1含有要求数目破碎面的颗粒;2没有达到要求的颗粒,见表2-4

注意,表2-4中部分颗粒确实拥有大于一个的破碎面。

如果没有明确要求多少个破碎面为标准,则默认指标为一个破碎面。

 

 

8.4 Determine the mass or count of particles in the fractured particle category and the mass or count of the particles not meeting the specified fracture criteria. Use mass to calculate percent fractured particles unless percentage by particle count is specified.

计算以上两类的重量或数量

计算达到要求的破碎面颗粒的比重

 

8.5 If more than one number of fractured faces is specified (for example, 70 % with one or more fractured faces and 40 % with two or more fractured faces), repeat the procedure on the same sample for each requirement.

如有多级破碎面的要求(比如70%拥有大于一个破碎面,40%大于两个破碎面),则重复以上操作