TESTING AND SPECIFICATION OF DRYMIX MORTAR IN SINGAPORE
ABSTRACT
Singapore is a small island country, but has won renown as uncorrupted government and high quality products. Independent testing and inspection played a very important role for this achievement. The Housing and Development Board (HDB) is the sole public authority in Singapore and was set up as a statutory on 1 February 1960. Within 45 years, it built more than 700,000 flats housing approximately 86% of the population. Every year, around 40,000 new flats (about 400 blocks) are built up to meet the demands. In March 1992, HDB launched the 15-year main upgrading programme (MUP) to vying the finishes and facilities of old estates up to the standard of those in the new…show more content… Six (6) spots |Individual strength > 0.70 N/mm2 |
| | |on the same sample panel shall be tested. | |
|3 |Water / Powder ratio |Not Applicable |< 0.25 |
| | | |(range to be specified by manufacturer) |
|4 |Compressive strength - 28 days |BS EN 1015-11: 1999 |12-20 N/ mm2 |
|5 |Polymer Content |Thermal Gravimetric Analysis & SDTA |0.8% min. by mass |
|6 |Consistence retentivity |BS 4551 : Part 1: 1998 |> 65% |
|7 |Water retentivity |BS 4551 : Part 1: 1998 |> 95 % |
|8 |Stiffening time |i) 1 N/mm2 |BS EN 1015-9 : 1999 |> 240 mins |
| | | |(Method A) | 0.60 N/mm2 |
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