Technical Specifications - UNDP

1. White Portland cement - 1 part
2. Sand - 1-1/2 parts
3. Add color additive to acquire the color of mortar approved by the supervising Engineer.
4. Add water proofer
Add integral waterproofing admixture to setting and pointing mortar in the quantity and manner
recommended by the manufacturer.
Generally, only approved mortar plasticiser shall be used in all mortars, unless otherwise instructed by the
Supervising Engineer.
4. Wall Grout
Fine grout shall be mixed in the following proportions by volume all in accordance with ASTM C476:
1. Portland Cement- 1 part
2. Hydrated Lime - 0 .1 part
3. Sand - 2.25-3 parts
Coarse grout, where required, shall be mixed in the following proportions by volume, all in accordance
with ASTM C479:
a- Portland Cement - 1 part
b- Hydrated Lime - 0.1 part
c- Fine Aggregate - 2.25 parts
d- Coarse Aggregate - 1-2 parts
Use sufficient water to produce a fluid, pourable consistency.
3. Mortar And Grout Mixing
1- Mortar and grout shall be machine mixed. Cement and hydrated lime may be batched by the bag. Sand
preferably shall be batched by weight, but subject to the approval of the Supervising Engineer may on
certain small operations be batched by volume in suitably calibrated containers, provided proper allowance
is made for weight per cubic foot, contained moisture, bulking and consolidation, shovel measurement shall
not be used.
2- Workability or consistency of mortar on the board shall be sufficiently wet to be worked under the
trowel. Water for tempering shall be available on the scaffold at all times. Mortar and grout which has
begun to "set" shall be discarded. Mortar and grout which has stiffened due to evaporation shall be
retempered to restore its workablility. Retempering of mortar and grout at the mixer shall not be permitted.
4. Setting of Extertior and Interior wall Stone
1- All setting shall be done in accordance with the approved shop drawings. All work shall set in a rigid
and substantial manner, straight and plumb, with all horizontal lines level and all vertical lines plumb,
unless otherwise shown on the Drawings. Similar abutting profiles shall accurately intersect and be in true
alignment. All joints shall be uniform and shall be of the size and detail shown on the approved Shop
Drawings.
2- Except as otherwise indicated and as herein specified. All anchoring devices shall be accurately set and
adjusted. Holes and slots for anchoring devices shall be filled completely with mortar. Each stone shall be
anchored securely in place.
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