AS NZS 2009-2006:2016 pdf free

AS NZS 2009-2006:2016 pdf free.Glass beads for pavement-marking materials
Glass beads of the size specified in Table 3, which are intended for incorporation into materials used for pavement-marking purposes, or intended for surface application to a wet film of pavement-marking material.
Glass beads of the size specified in Table 3, which are intended for surface application to a wet film of pavement-marking material, and/or, intended for incorporation into materials used for pavement-marking purposes. An additional version of Type D beads is available (Type D-HR), which provides a higher level of retroreflectivity.
NOTE: A method for determination of retroreflectivity of Type D-HR beads is provided in Appendix M.
Beads shall be manufactured from clear and colourless commercial grade soda lime glass cullet that has been cleaned to remove any opaque particulate and other matter that may interfere with the retroreflective properties of the beads. Beads may also be manufactured from raw materials. The glass beads shall contain no less than 62% amorphous silica. Beads produced using either process shall comply with all requirements of Clause 5.
When a minimum of 200 beads is examined under the magnification specified in Table 2,the beads shall comply with the following:
(a) Beads shall be clear and shall not show opacity greater than 2% by count.
NOTE: Some adhesion coated beads may be semi-transparent and this should be taken into account when assessing opacity.
(b) Beads with greater than 25% of the visible area affected by gas inclusions (bubbles),shall be considered defective, and no more than 2% by count shall exhibit this defect.
(c) Bead surfaces shall be smooth and no more than 2% by count shall exhibit surface crazing.
NOTE: Appendix K provides pictorial examples of beads with defects and without defects.To facilitate counting of the beads, they may be spread in a single layer over the base of a clear, colourless watch glass, or recessed microscope slide, and placed over a sheet of 1 mm graph paper to allow segmenting of the beads into manageable groups. Petroleum jelly or similar may be used to prevent the beads from moving around during examination.AS NZS 2009-2006 pdf free download.