Masonry Magazine September 2008 Page. 47
QUIKRETE Restores Historic Mortar
Consultants from the Martin House Restoration Corp. worked with QUIKRETE to match the formula of the masonry mortar on the historic home, using the resulting local source of aggregate.
"The matching of mortar on a building that is more than 100 years old presents many challenges," Darner says. "At the time of initial construction of the multi-structure complex, there were no ASTM specifications or testing agencies to oversee the quality of the materials utilized."
Inquiries were made to multiple contractors to determine the masonry practices used during the time of construction. Luckily, masonry contractors tend to pass the business along to their families, affording QUIKRETE some insight into past practices, he says.
"We also contacted aggregate and cement suppliers in an effort to identify the source of the materials utilized," Darner adds. "The entire process was an investigation without any documented evidence."
Samples of various cement, lime, pigment and aggregate also were obtained and blended to achieve an exact match, and multiple samples were produced in an effort to duplicate the existing mortar on the Darwin Martin House complex.
Once QUIKRETE was able to achieve an exact match, a sample panel was constructed for review and acceptance by all parties involved with the project. More than 60 different test panels were required throughout this evaluation process.
Due to their support of the restoration and material matching effort on the Darwin D. Martin House complex, The QUIKRETE Companies have received an increase in requests to match existing and historical mortars. In addition, the Bulk Products division of The QUIKRETE Companies continues to expand the product lines they can offer their customer base in the construction industry. IMAS
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