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#1099 & #1399 <br />1 04110-2 <br />RESTORATION MORTAR <br />1. Remove several original construction samples of mortar to be <br />2.3 ADMIXTURES <br />A. Do not use anti -free compounds to lower freezing point of mortar or <br />grout. <br />B. Non -chloride accelerators are acceptable providing they are <br />submitted and approved in advance and will not, result in <br />unacceptable color variations. <br />2.4 MORTAR PROPORTIONING <br />A. Re -pointing mortars: Use slightly softer mix than existing adjacent <br />mortars as per section 2.01 A. & B. <br />B. JOB SITE PROPORTIONED MATERIALS; use one part of the sum of Portland <br />Cement and high Hydrated Lime content as per ASTM 0270, Table ly <br />adjusted for to match existing mortars as close as practical and <br />adjusted for hardness and workability with the lime and aggregate <br />ration of up to 3-1/4 parts sand. In general, start out with 6 to <br />8 parts sand,. 1 part white Portland cement and 1 part lime. <br />Achievingno larder than a type "N" -mortar. <br />C. Adjustments will have to made on the above to match the existing <br />mortar mix. <br />[a <br />matched from several locations on the building (set the <br />largest typical samples aside - these shall be used later for <br />testing and for comparison with the repointing mortar). <br />2. Break the remaining samples apart with a wooden mallet until <br />they are separated into there constituent parts, There should <br />be a good handful of the material. <br />3. Carefully blow away the powdery material (the lime or cement <br />matrix which bound the mortar together). Then wash and dry <br />the remaining materials and repeat the process until all that <br />is left is primarily the original aggregates. <br />4. Examine the remaining aggregate, and submit samples with the <br />closest match of range of color, sharpness, and the varying <br />sizes of the individual grains of aggregate. <br />B. <br />ted change in the existing <br />Repeat this process whenever there is a noted <br />mortar color, texture, compressive strength, or consistency. <br />2.2 MATERIALS <br />A. <br />Portland Cement; ASTM 0150. <br />B. <br />Hydrated Lime; ASTM 0207, Type S. <br />C. <br />Mortar Aggregates; Use aggregates as selected by section 2.01 A. <br />B. and meeting ASTM C144, submit samples for evaluation. <br />D. <br />Water;.Clean and free of chloride ions. <br />2.3 ADMIXTURES <br />A. Do not use anti -free compounds to lower freezing point of mortar or <br />grout. <br />B. Non -chloride accelerators are acceptable providing they are <br />submitted and approved in advance and will not, result in <br />unacceptable color variations. <br />2.4 MORTAR PROPORTIONING <br />A. Re -pointing mortars: Use slightly softer mix than existing adjacent <br />mortars as per section 2.01 A. & B. <br />B. JOB SITE PROPORTIONED MATERIALS; use one part of the sum of Portland <br />Cement and high Hydrated Lime content as per ASTM 0270, Table ly <br />adjusted for to match existing mortars as close as practical and <br />adjusted for hardness and workability with the lime and aggregate <br />ration of up to 3-1/4 parts sand. In general, start out with 6 to <br />8 parts sand,. 1 part white Portland cement and 1 part lime. <br />Achievingno larder than a type "N" -mortar. <br />C. Adjustments will have to made on the above to match the existing <br />mortar mix. <br />[a <br />