AMR Labs provides historic mortar
analysis to identify historic lime and the composition formula of
historic mortar through a detailed
Historic Lime Mortar Matching Analysis
We test old historic mortars to identify historic lime and the composition formula of historic mortar through mortar analysis. By analyzing samples of old mortar, we can determine the composition of the samples even if they are crumbled. While historic mortars contain historic lime, they often have other portions to their composition.
During our analysis of historic mortar compositions, we analyze the sand, plant and animal fibers/hair, lime, Portland, sealers, contaminants, and pigments. You will receive a detailed mortar analysis report and formula for replicating the historic mortar, and recommendations that may be relevant. If you need other information about the mortar being tested, be sure to include it in your notes to us.
If you have questions about mortar analysis, historic lime, our testing process, or special testing requirements, please call or email us.
We provide services across the U.S.
1525 Corona Dr.
Granbury, TX 76048
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AMR Labs is a mortar testing lab providing analysis of historic mortar samples to determine the composition of existing mortar and create a matching mortar formula, and offers mortar color matching services also. Our lab testing services are often used to analyze and match old historic lime mortar for historic restoration and preservation, to determine mortar types and composition formulas, to determine if a quality mortar was used, or if the mortar used matches the recommended mortar materials for a project.
Mortar testing is the process of
analyzing samples of mortar, but
not all testing methods are the same or for the same purpose. There
are many testing methods provided by the astm for
mortar samples. With each individual testing method, there are
limitations to the accuracy of their results. This is especially
true of the astm c1324 mortar testing method.
The reason for the variance and inaccuracy of these types of mortar analysis is they miss many useful details about the mortar that can be used in a scientific analysis of the mortar to limit variance and increase the accuracy of the mortar testing results.
How mortars are tested in our
analysis and what you get in your
mortar analysis testing report.
Mortar Analysis Testing
Our mortar analysis uses many of the common mortar analysis procedures including the compressive strength testing of mortar, acid digestion method of mortar analysis, and examining the samples through magnification, and collects these commonly unused facts about the samples of mortar. These additional details are used and calculated into our interpretations and results to logically eliminate the range of variance in testing results. Through this, we can more accurately identify the mortar composition formula and provide better results than any mortar testing lab using one standard testing method for mortar analysis.
Through use of our mortar analysis testing method, we are able to determine the mortar composition and match mortar colors more closely. As the color of mortar depends on its composition, matching mortar color also is dependant on the composition of mortar being matched.
Testing Mortar Samples/Mortar Composition Matching
This is why mortar analysis and testing are important in any masonry repair or historic mortar restoration.
Testing samples of hardened mortar is imperative to any masonry
mortar restoration, but especially in historic mortar repair.
Historic mortar tends to be much softer than the new mortars, and
ranges greatly in its compressive strength. This is due to the
bricks and stones used. Most of the bricks and tile were hand made
and sun baked and were much softer than the hard fired clay bricks
used today, and to prevent damage to the bricks, a softer mortar was
In preserving and restoring these historic mortars and
historic buildings, it is important to test and
match the existing mortar and
its compressive strength to prevent damage to these
historic antique bricks that cannot be replaced.
Analysis & Matching Existing Mortar
However, analyzing and testing mortar for matching is not limited to historic masonry. It is just as important to match the mortar of today. Mismatched mortar can cause many common masonry problems. Among these are chipping or spalling brick faces, loose bricks, loose mortar, mortar popping loose or popping out, mortar cracking after repairs, mortar separation cracks, crumbling mortar, and many more. These are all resulting from new mortar not matching the existing mortar in the mortar joints. Mortars that are harder than the old mortar tend to pop loose and damage brick faces because they are not bonding to the existing mortar, and mortars that are softer than the old mortar tend to crumble or deteriorate rapidly.
Matching Mortar Composition
Matching the composition of mortar is the first step in matching mortar color for masonry repair.
When restoring or repairing masonry, take the time to match the mortar type and composition. This will include the color and graded particles of the sand which compose the majority of most mortars and can change the color of mortar significantly. We also recommend matching the mortar color pigments or aging as this will effect the appearance of the repairs. Mismatched mortar color makes the masonry repair look bad and there is no reason for the repairs to stand out.
We offer many types of mortar analysis and masonry testing including mortar color/composition matching. Some are listed below.
This mortar analysis analyzes the compressive strength of mortar, the mortar composition, mortar type, the sand gradation, and produces a mortar formula for matching the mortar composition and type of the existing mortar sample being tested or to analyze and compare two samples of mortar to determine if they are the same. This mortar analysis includes compressive strength testing, hydrochloric testing or acid digestion of mortar, magnified examination, weight loss, and sand analysis. A cleaned sample of the original sand is returned to you with the mortar testing report. This test is also used to determine if the old mortar is a historic mortar or rather contains historic lime.
In this mortar analysis, we analyze the composition of mortar samples, compressive strength, and color and produce a mortar formula for matching the existing mortar color and composition. This includes an analysis of the original sand.
This analysis is designed to test the crushing pressure or compressive strength of mortar, brick, stone, block, or tile, and is used to analyze and determine if the mortar used is a good mortar for the masonry units or to determine what type of mortar should be used with the units. A good mortar is slightly softer than the brick or stone it is used to install to prevent damage to the masonry unit.
There is no reason for
masonry repair to look like this.
Get the mortar tested and properly matched. View our photos to see what this project looks like after our mortar testing and mortar matching services.