Skip to content Skip to footer
0 items - P0.00 0

BOS 602:2014


Particles of diameter not exceeding 20 μm and not exceeding 5 μm and smaller, respectively, in fine aggregate (pipette method) — Specification

SKU: BOS 602:2014 Category: Product ID: 27853

Additional information

ICS Code

ICS Name



Published Date

Replaced by



Standard Development Stage

Standard Status

Technical Committee

, , ,

Type of Standards


This Botswana Standard specifies a method for determining the proportions of particles of diameter not exceeding 20 μm and not exceeding 5 μm and smaller, in fine aggregate. Particles of different sizes in fine aggregate are divided indirect, by means of sedimentation. The relation between the diameter and settling velocity of spherical particles in water is given by Stokes’ Law. Samples are taken by means of pipette from an aqueous solution in which the material of known density is suspended at a given depth. After a specified standing time, and when the particles are dried and weighed, the proportions of particles of diameter not exceeding 20 μm and of diameter not exceeding 5 μm and smaller, respectively, are determined.

The Botswana Bureau of Standards (BOBS) understands the importance of impartiality and confidentiality in carrying out its management system certification activities. BOBS management is committed to gaining and maintaining the reputation, credibility and ultimately, confidence of its stakeholders in rendering its certification services. Additionally, BOBS strives to continuously manage foreseen potential conflicts of duty and interest and ensures objectivity of its activities under the management system certification. To achieve the above, BOBS shall identify, analyse, record and manage potential conflict of duty and interest to ensure that certification services are not provided within relationships that have been identified to pose an unacceptable threat to impartiality. An Impartiality Committee shall periodically review activities of the certification function to verify commitment to credibility and fairness. The Committee shall further assist in the development of policies relating to impartiality of providing certification activities. BOBS is committed to maintaining in strict confidence all information accessed while rendering the certification services and shall ensure that such information is not divulged to third parties without the Client’s written consent unless if required by law.
Demand Quality

When things don't work as they should, it often means that standards are absent.

BOBS Head Office
Physical Address —
Plot No, 55745, Block 8, Mail Airport Road
Postal Address —
Private Bag B048,
Gaborone, Botswana
Francistown office
Physical Address —
Plot No, 32367, Donga,
Adjacent Metsef Wholesalers
Postal Address —
Private Bag F465,
Francistown, Botswana
BOBS Weighbridge
Physical Address —
Plot No: 20683, Ramakukane
Road, Block 3 Industrial,
Gaborone, Botswana
BOBS © Copyright 1992 – 2024. All Rights Reserved. Developed by Weblogic.
Go to Top