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Victoria University TEST REPORTS
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October 18, 1995 Reference: BPSU/134 Technical Data: Subject: Water absorption of mortar containing Tasco/Tech-Dryad Mortar Additive. Water absorption data for:: Standard mortar containing Tasco/Tech-Dryad Mortar Additive CONTENTS 1. Preparation of substrates 2. Test method 3. Results 1.PREPARATION OF SUBSTRATES Materials. Cement - standard Type A cement Sand - bricklayer's sand Gauging Liquids - Reference: Water Samples 1,2 &3: Tasco/Tech-Dry Mortar Additive dissolved in water in a ratio of 1:10. Preparation method : The sand and cement was dry blended until homogenous. The gauging liquid was added until the desired consistency for laying obtained. The wet mortar was cast in PVC rings of dimensions 75mm Dia x 300 deep. The discs were de-moulded after harding overnight and let cure at 20C/50% R.H for 28 Days. All samples were cast in triplicate. Sample Composition Table 1 shows the composition of mortar samples. |
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2. TEST METHOD After curing, the discs were oven dried at 70C overnight, cooled and weight. All discs were placed on water saturated polyurethane sponge in a water bath according to DIN52617. The mass of discs was measured at 2, 5and 24 hours. 3. RESULTS The capillary water absorption versus time is presented in Graph 1. |
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The results show that the inclusion of Tasco/Tech-Dry Mortar Additive reduces the capillary water absorption of the mortar from 9.9% to 2.1% by mass. This represents an overall reduction of water absorption of 79%. Signed : Dr.D A Kagi Date18/10/1995 |
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