brick repair is a more detailed process than just
matching the color. This is because the composition of the mortar that
determines the mortar type directly affects the color. Additionally, the
composition and mortar type determine the compressive strength of the
mortar, the amount of water penetration, and the ability to bond together.
Without matching these factors about the mortar, any repair is not going
to last and will likely cause damage to the bricks.
How to Match Brick Mortar
Matching Mortar Accurately
The only way to match mortar accurately is through
analysis of the mortar composition if the composition, formula, and ratio
of sand is unknown, and through mixing the replacement mortar per this
formula and ratio from the base ingredients and not from small portions of
prepackaged mortar of the desired mortar type. The prepackaged mortars are
not consistent throughout the package, but rather require the full content
of these bags to make the specified mortar type. Therefore, to make
smaller portions or adjust color of base tones, you must follow the same
formula and ratio of ingredients used to make those packages applied to a
smaller scale and color adjustments using the grey/white Portland.
The primary ingredients of mortar is Portland + lime +
sand. The base tone between grey and white can be adjusted in the
Portland. There are both grey and white forms of this material, and as
long as your mortar formula contains the same amount of Portland in the
ratio, the color of Portland is not relevant to anything but the resulting
color tone. This is why mixing from the base ingredients of mortar allows
accuracy and color adjustment at any scale of volume needed.
How to Match Mortar Color
When adjusting base tones (grey to white) or color tones,
it is very important to know the color and gradation of the sand because
the sand composes nearly 70-80% of the mortar and directly affects the
color. This is why if you mix white type N mortar mix with a sand that is
reddish brown with about 10% of the particles being smaller and black,
your mortar will have a buff tone with a light grey appearance even when
no grey Portland is used in the mix.
Mortar Matching Process
Mortar Matching Analysis
mortar matching or color matching
analysis listed below provides basic testing of the mortar
to confirm the compressive strength and bonding ability based on a known
mortar type or where the mortar type is based on the compressive strength
of the mortar sample being matched. It also provides basic information
about the sand used and provides a sample of original sand used with the
results. If you need more detailed information about the mortar
composition or sand, you may need to add a
sand sieve analysis or add both a
sieve analysis and color match to a full
send you a sample of your sand rinsed during analysis to compare to when picking
your local sand.
check for known contaminates in your
Most repair projects only use one box
Mortar Matching procedures for ordering are as follow:
Collect and label each sample (if you are ordering
multiple tests) and package them in bags for shipping. Crumbled
samples are ok, but try to get some pieces for crushing. We need a few
pieces or about a cup of mortar. Some surface pieces are best for
Send samples to AMR Labs at 1525 Corona Dr. in
Granbury, TX 76048 using your preferred shipping method (U.S. postal
service offers flat rate boxes that work well).
Include samples, your contact information (phone,
shipping, and E-mail), and a check or receipt from online payment,
and any special instructions or needs.
The cost is per sample tested. Be sure to make
payment for how many tests are needed.
From the time we receive the samples of mortar, the
process takes 1-2 weeks to get your test results. In some cases it may
be quicker. Test results are sent back by mail and e-mail if we have
All credit card payments must be processed online.
Order mortar mixes pre-matched to your formula.
Each box contains 2 bags of mortar.
The Brick Repair Guide now and learn step-by-step how easy
Repair can be.
If you use the buy now button below to get the book, it will process
that order separately than anything using add to cart in order to put you
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