February_1968 — Page 19

some concrete facts about WRDA

WRDA

a unique new water extender (or water reducing agent) developed by W. R. Grace eliminates the need for 15% to 20% of the water normally used in a portland cement concrete mix. WRDA requires no pre-mixing. It is delivered ready for use, factory-controlled to ensure optimum, consistent results. WRDA makes concrete plastic and workable; gives low slumps without loss of placeability, and enriches the cement paste.

WRDA encourages concrete to flow cleanly and responsively It reduces all types of segregation, cuts shrinkage and limits changes in volume.

WRDA increases the compressive strength of concrete (up to 25%) and flexural, tensile and bond strengths as well. It also improves the appearance of concrete surfaces and produces a denser, less permeable finish.

Maybe you think the dangers of excess water add up to a calculated risk. But why take the risk when WRDA is

calculated to eliminate it Completely!

GRACE

CONSTRUCTION MATERIALS

MALAYSIA - MALAYSIAN ROCK PRODUCTS SDN BERHAD. NO 20 ROAD 52/4, PETALING JAYA.

PAKISTAN - NAULAKHA TRADING COMPANY, TAYABJI ROAD, KARACHI.

PHILIPPINES PHILROCK MARKETING CORPORATION, 650 SHAW BOULEVARD, MANDALUYONG, RIZAL SINGAPORE - MALAYSIA ROCK (SINGAPORE) LIMITED, 153 McNAIR ROAD.

TAIWAN - CHINA PRODUCTS COMPANY, P.O. BOX 22011. TAIPEI.

THAILAND - J.J. ALLMANN (THAILAND) SALES LTD., 4 SOI UTHAIRAT PATIPAT ROAD, PO BOX 351, BANGKOK.

W.R. GRACE (HONG KONG) LIMITED

303- Kayamally Bld. Queen's Rd. C. Hong Kong. Tel. H-243196

Far East Architect & Builder February, 1968

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