“All concrete (state section) shall be waterproofed by the addition of Cementaid HYDROPHOBIC POREBLOCKING INGREDIENT(HPI) named AQUAPEL System, in such a way that the concrete shall have a corrected 30 minute water absorption of not greater than 2.00 % as measured by BS 1881:Part 122:1983 except that the age at test shall be 7 days and shall complying with the AQUAPEL System minimum requirement stipulated below. The dosage of AQUAPEL shall be at the rate of 8 liters per cubic meter of concrete and shall be combined with Hyperplasticiser(SPC203) at 0.45% to 0.55% by weight of cement, so that the resulting (water+8)/cement ratio shall not be more than 0.37 and that the AQUAPEL concrete slump prior to placing is at 14 cm to 18 cm. AQUAPEL concrete shall be cured using Cementaid CALCURE B*R at a rate of 1 liter per 5 to 8 m2.”

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