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Paris Santa Fe-Frisco Depot Rehabilitation © KEYSTONE ARCHITECTS <br /> July 10, 2001 <br /> <br /> brick joints, this will require removal of the mortar to a depth of approximately 1/2" <br /> to 1". Any loose or disintegrated mortar that lies beyond this minimum depth should <br /> also be removed. <br /> <br /> E. The use of power tools such as saws with carbide blades or impact hammers for the <br /> removal of mortar is expressly forbidden. Only hand-held, hand-powered tools will <br /> be provisionally allowed, and contractor must demonstrate considerable skill in <br /> execution so that surrounding bricks will not be damaged by mortar removal process. <br /> Remove mortar using great care. Do not gouge or cut bricks. <br /> <br /> F. Mortar should be removed cleanly from the bricks, leaving square corners at the <br /> back of the cut. Before filling, the joints should be rinsed with a jet of water to <br /> remove all loose particles and dust. At the time of filling, the joints and adjacent <br /> bricks should be damp but with no standing water present. <br /> <br /> H. Mortar Preparation: <br /> 1. Recheck all mortar mix materials prior to mixing. Thoroughly wash sand till <br /> free of salt and other impurities. Mortar should be mixed carefully to obtain <br /> uniformity of visual and physical characteristics. <br /> <br /> 2. Dry ingredients should be measured by volume and thoroughly mixed before <br /> the addition of any water. Half the water should be added, followed by mixing <br /> for approximately 5 minutes. The remaining water should then be added in <br /> small portions until a mortar of the desired consistency is reached. <br /> <br /> 3. The total volume of water necessary may vary from batch to batch, depending <br /> on weather conditions. <br /> <br /> 4. Mortar should be used within 30 minutes of final mixing. "Re-tempering," or <br /> adding more water after the initial mix is prepared, results in poor quality <br /> mortar and is not permitted. <br /> <br /> I. Do not use any admixtures or additives including, but not limited to, antifreeze <br /> compounds, air-entraining additives, or bonding agents. <br /> <br /> J. Joint Filling and Pointing: <br /> <br /> Section 04200 <br /> Page 4-6 <br /> <br /> <br />