Spec Revision Section 04100.pdf
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Spec Revision Section 04100
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12/97 04100-1
MORTAR
SECTION 04100
PART 1 GENERAL
1 .1 DESCRIPTION
A. The work of this section consists of furnishing mortar for brick veneer work specified in Section 04211.
1 .2 SUBMITTALS
A. As specified in Section 01300.
B. Certificate: Manufacturer's certification that materials and products meet specified requirements.
1 .3 PRODUCT HANDLING
A. Delivery: Deliver materials in manufacturers' original, unopened, protective packaging.
B. Storage: Store cementious materials in a dry area, under cover, and off the ground.
1 .4 PROJECT CONDITIONS
A. Do not place mortar when temperature is below 40 degrees F unless approved means are provided to heat sand or water and ensure that mortar will harden without freezing.
PART 2 PRODUCTS
2 .1 MORTAR MATERIALS
A. Match color of Bathhouse brick mortar in the adjacent campground.
B. Portland Cement: ASTM C150, Type I.
C. Masonry Cement: ASTM C91.
D. Lime: ASTM C207, Type N.
E. Lime Putty: Stiff mixture of lime and water.
F. Quicklime: ASTM C5, slaked in accordance with manufacturer's recommendations.
G. Aggregates: ASTM C144.
H. Water: Clean and potable.
I. Color: For exposed work, provide limeproof and alkaliproof mineral oxide pigments produced by an approved manufacturer.
2 .2 MORTAR PROPORTIONS (MEASURED BY VOLUME)
12/97 04100-2
A. ASTM C270-97a, Type N. 1 part cement, 1 part lime or lime putty, 6 parts sand.
PART 3 EXECUTION
3 .1 MIXING POINTING MORTAR
A. Mix all materials as dry as can be handled in a mechanical mixer until thoroughly combined. Just before pointing, add only enough water to make mortar workable. Use mortar within 20 minutes after adding water.
3 .2 MIXING SETTING MORTAR
A. While mixer is in operation, add three-fourths of the required water, one half of the sand, and all of the lime and cement; then the remainder of the sand. Allow batch to mix briefly; add water in small quantities until mortar is of a workable consistency. To ensure complete hydration, mix all cementitious materials and sand in mechanical batch mixer for a minimum of 10 minutes after adding all materials. If mortar begins to stiffen, retemper immediately by adding water and remix.
When air temperature is 80 degrees F or higher, use mortar within 1-1/2 hours; under 80 degrees F, use within 2 hours. Discard remaining mortar. Retempering within these time limits will be permitted only as necessary to maintain workability. Use no calcium admixtures or antifreeze chemicals.
PART 4 MEASUREMENT AND PAYMENT
4 .1 MORTAR
A. Payment will be included in the bid item to which this work relates.
END OF SECTION
| 1 .1 DESCRIPTION |
| A. The work of this section consists of furnishing mortar for brick veneer work specified in Section 04211. |
| 1 .2 SUBMITTALS |
| A. As specified in Section 01300. |
| B. Certificate: Manufacturer's certification that materials and products meet specified requirements. |
| 1 .3 PRODUCT HANDLING |
| A. Delivery: Deliver materials in manufacturers' original, unopened, protective packaging. |
| B. Storage: Store cementious materials in a dry area, under cover, and off the ground. |
| 1 .4 PROJECT CONDITIONS |
| A. Do not place mortar when temperature is below 40 degrees F unless approved means are provided to heat sand or water and ensure that mortar will harden without freezing. |
| 2 .1 MORTAR MATERIALS |
| A. Match color of Bathhouse brick mortar in the adjacent campground. |
| B. Portland Cement: ASTM C150, Type I. |
| C. Masonry Cement: ASTM C91. |
| D. Lime: ASTM C207, Type N. |
| E. Lime Putty: Stiff mixture of lime and water. |
| F. Quicklime: ASTM C5, slaked in accordance with manufacturer's recommendations. |
| G. Aggregates: ASTM C144. |
| H. Water: Clean and potable. |
| I. Color: For exposed work, provide limeproof and alkaliproof mineral oxide pigments produced by an approved manufacturer. |
| 2 .2 MORTAR PROPORTIONS (MEASURED BY VOLUME) |
| A. ASTM C270-97a, Type N. 1 part cement, 1 part lime or lime putty, 6 parts sand. |
| 3 .1 MIXING POINTING MORTAR |
| A. Mix all materials as dry as can be handled in a mechanical mixer until thoroughly combined. Just before pointing, add only enough water to make mortar workable. Use mortar within 20 minutes after adding water. |
| 3 .2 MIXING SETTING MORTAR |
| A. While mixer is in operation, add three-fourths of the required water, one half of the sand, and all of the lime and cement; then the remainder of the sand. Allow batch to mix briefly; add water in small quantities until mortar is of a workable consistency. To ensure complete hydration, mix all cementitious materials and sand in mechanical batch mixer for a minimum of 10 minutes after adding all materials. If mortar begins to stiffen, retemper immediately by adding water and remix. When air temperature is 80 degrees F or higher, use mortar within 11/2 hours; under 80 degrees F, use within 2 hours. Discard remaining mortar. Retempering within these time limits will be permitted only as necessary to maintain workability. Use no calcium admixtures or antifreeze chemicals. |
| 4 .1 MORTAR |
| A. Payment will be included in the bid item to which this work relates. |
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