CONSTRUCTION STANDARD SPECIFICATION

SECTION 04050

MASONRY MORTAR AND GROUT

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PART 1 - GENERAL

1.01 Summary [2](#summary)

1.02 References [2](#references)

1.03 Submittals [3](#submittals)

1.04 Environmental Requirements [3](#environmental-requirements)

PART 2 - PRODUCTS

2.01 Materials [3](#materials)

PART 3 -- EXECUTION

3.01 Preparation Of Mixes [5](#preparation-of-mixes)

3.02 Usage [5](#usage)

3.03 Application [5](#application)

3.04 Field Quality Control [5](#field-quality-control)

CONSTRUCTION STANDARD SPECIFICATION

SECTION 04050

MASONRY MORTAR AND GROUT

# PART 1 - GENERAL

## 1.01 SUMMARY

A. RELATED SECTIONS

1\. Section 03300, "Cast In Place Concrete"

2\. Section 04220, "Concrete Masonry Units"

3\. Section 05500, "Metal Fabrications"

4\. Section 07200, "Building Insulation"

5\. Section 07600, "Exterior Insulated Finish System"

6\. Section 09900, "Painting"

## 1.02 REFERENCES

A. American Society for Testing and Materials (ASTM)

C143 Test for Slump of Portland Cement Concrete

C144-93 Specification for Aggregate for Masonry Mortar

C270 Mortar for Unit Masonry

C404 Specification for Aggregates for Masonry Grout

C476 Mortar and Grout for Reinforced Masonry

C780-02 Standard Test Method for Preconstruction and Construction
Evaluation of Mortars for Plain and Reinforced Unit Masonry

C1019 Standard Test Method for Sampling and Testing Grout

B. Masonry Codes and Specifications

C. National Concrete Masonry Association (NCMA)

D. International Building Code (IBC): Chapter 21 Masonry

## SUBMITTALS

Submit the following in accordance with conditions of Contract and
Section 01330, \"Submittal Procedures\":

A. Test reports: Testing laboratory shall submit test reports indicating
compression, yield and slump of mortar and grout.

B. Asbestos-free and lead-free certification for all masonry mortar and
grout.

C. Samples: Colored masonry mortar samples showing full extent of colors
available.

D. Material certificates: Certificates signed by manufacturer and
Contractor certifying that each material complies with requirements, for
each different cement product required for mortar and grout, including
name of manufacturer, brand, type, and weight slips at time of delivery.

## ENVIRONMENTAL REQUIREMENTS

Heat mixing water when air temperature is below 40^o^ F and heat
aggregates when air temperature is below 32^o^ F, to assure mortar and
grout temperatures between 40^o^ F and 120^o^ F until installed. Do not
heat water or aggregates above 120^o^ F.

# PART 2 - PRODUCTS

## 2.01 MATERIALS

A. Mortar: Mortar mix shall comply with proportion specifications of
ASTM C270 for job-mixed mortar. Masonry cement shall not be used for
mortar.

1\. Aggregate ratio shall be not less than 2 1/4 and not more than 3
times the sum of the separate volumes of cementitious materials.

2\. Exterior Walls Above Grade: Type S, 1/4 to 1/2 part hydrated lime to
1 part Portland cement by volume.

3\. Exterior Walls At or Below Grade: Type M, 1/4 part hydrated lime to
1 part Portland cement by volume.

4\. Interior Walls: Type S, 1/4 to 1/2 part hydrated lime to 1 part
Portland cement by volume.

B. Grout: Grout shall comply with proportion requirements of ASTM C476.

1 part Portland cement

1/10 part hydrated lime

3 parts sand

2 parts coarse aggregate (for coarse grout only, omit for fine grout)

C. Slump: Unless otherwise indicated, mix grout to a consistency, which
has a slump between 8 and 10 inches (203 and 254 mm).

D. Portland Cement: ASTM C150, Type I or II, except Type III may be used
for cold-weather construction. Provide natural color or gray cement as
required to produce required mortar color.

E. Hydrated Lime: ASTM C207, Type S.

F. Fine aggregate: ASTM C144, except for joints less than 1/4 inch (6.35
mm) use aggregate graded with 100% passing the No. 16 sieve.

1\. Gray Mortar Aggregates: Gray sand or ground gray stone.

2\. Colored Mortar Aggregates: Ground marble, granite, or other sound
stone, as indicated.

G. Coarse aggregate: ASTM C404, maximum size 3/8" sieve.

H. Admixtures: The use of admixtures including color pigments,
accelerators, retarders, water repellent agents, or other admixtures
shall not be permitted except as specified or as directed by the SDR.

1\. No air-entraining admixtures or materials containing air-entraining
admixtures may be used for mortar.

2\. No antifreeze compounds shall be added to mortar or grout.

3\. No admixtures containing chlorides shall be added to mortar or
grout.

I. Water: Water shall be clean, potable and free of deleterious
quantities of acids, alkalis, and organic materials.

J. Colored Mortar Pigments: Mortar pigment shall conform to ASTM C979.

1\. Natural and synthetic iron oxides, chromium oxides and carbon black,
compounded for use in mortar mixes. Use only pigments with record of
satisfactory performance in masonry mortars.

2\. Mineral oxide pigment shall not exceed 10% of the weight of Portland
cement.

3\. Carbon black shall not exceed 2% of the weight of Portland cement.

4\. Subject to compliance with requirements, products that may be
incorporated in the work include, but are not limited to, the following:

\"Centurion Pigments,\" Centurion.

\"True Tone Mortar Colors,\" Davis Colors, A Subsidiary of Rockwood
Industries, Inc.

\"SGS Mortar Colors,\" Solomon Grind-Chem Services, Inc.

# PART 3 -- EXECUTION

## 3.01 PREPARATION OF MIXES

A. Mortar: Mix mortar materials in a mechanical mixer with approximately
one-half (½) of the water and fine aggregate placed into the mixer
first. Cementitious materials, and remaining water and sand should then
be added and mixed for not less than 5 minutes. Hand mixing shall not be
used unless specifically approved by Architect.

B. Grout: Proportion and mix grout in accordance with the requirements
of ASTM C476. The mixture shall be fluid as possible without segregation
of materials. Consistency of grout shall have a slump of 8 to 10 inches,
as determined by ASTM C-143, at time of placement.

## USAGE

Use mortar and grout within 1-hour of initial mixing. Discard mortar and
grout that have begun to set. If mortar stiffens from evaporation or
absorption of mixing water, temper by adding water and remixing. Mortar
or grout mixture shall not only be retempered once.

## APPLICATION

Use as specified in Section 04220, "Concrete Masonry Units".

## 3.04 FIELD QUALITY CONTROL

A. The Contractor shall employ the services of a qualified testing
laboratory to perform tests and submit test reports.

B. Provide daily field tests for mortar per IBC standards.

C. Grout slump per ASTM C143 for each set of compressive strength test
specimens.

D. Compression Test Specimens: Obtain and test grout samples per ASTM
C119 on a daily basis during grouting operation. When volume of grout
utilized exceeds 25 cubic yards in one day increase test frequency to
provide tests for every 25 cubic yards of fraction thereof.

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