Low Water Absorption

The elements Potassium Oxide (K2O) , Magnesium Oxide (MgO) and Titanium Dioxide (TiO2), which are contained in Basfiber® are very important for improving the resistance corrosion and water-resistance. The fiber loss after 3 hours boil the comparison between Basfiber® and E glass fiber as following: the Basfiber® fiber loss weight is 0.2%, but the E glass fiber is 0.7%, in 2NaOH, the former is 2.75% and the last is 6.0%; in 2N HCl, the former is 2.2% but the last is 38.9%. The acid resistance is higher than ECR glass fiber of the acid resistance glass reinforced material.

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To explore the corrosion property of Basfiber® and its reinforcing composites, the Basfiber® was boiled 3 h in water, sodium hydroxide and hydrochloric acid. The residual tensile strength and mass loss of Basfiber® after boiled were investigated. It was showed that the alkali resistance of Basfiber® is better than acid resistance. To investigate the chemical durability of basalt composite in different mediums, samples were immersed in eight kinds of chemical mediums for 15, 30 and 90 days. After each period of immersion, the bending properties were tested and surface morphologies were observed. Study results reveal that the corrosion behaviour of composite is very different in acid and alkaline due to Basfiber® resistance difference. In acid mediums, the bending strength and bending module change in the same way. In alkaline mediums, bending module is very blunt compared with bending strength, bending module keeps close to the originality while bending strength declines gradually.

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