707CEMENT MORTAR

New Hampshire Department of Transportation Standard Specifications – 2016 Description

1.1Cement mortar shall consist of either Portland cement or masonry cement, mortar sand, and water.

Materials

2.1Portland cement shall conform to 520.2.1.

2.2Mortar sand shall meet the requirements of AASHTO M 45 except as shown in Table 707 -1.

Table 707-1 - Gradation of Mortar Sand Sieve Size Percent by Weight Passing No. 8 100 No. 16 60 - 100 No. 50 15 - 35 No. 100 2 - 15 No. 200 0 - 5 Note: In lieu of the above, fine aggregate graded in accordance with 520.2.2.2.2 may be used in mortar for mortar rubble masonry and with concrete blocks for catch basins and drop inlets.

2.3Testing for impurities shall comply with AASHTO T 21. Results that are darker than the standard shall be cause for rejection,

except as provided in 2.3.1.1. 2.3.1 Sand for mortar not conforming to 2.3.1 shall be tested in accordance with AASHTO T 71 and shall meet the requirements of 5.2.3 of AASHTO M 45.

2.4Water shall meet the requirements of 520.2.5.

Proportions and Procedures

3.1Mortar shall be composed of one part by volume of Portland cement, except as specified in 3.4, and two parts by volume of

damp loose mortar sand with water as necessary to obtain required consistency.

3.2Hand mixing of mortar shall require thorough mixing of the dry cement and damp sand, in a clean, tight mortar box until the

mixture is of a uniform color. Water shall be added in such quantity as to form a mortar having the desired consisten cy.

3.3Machine mixing of mortar shall require mixing of the dry cement and damp sand, then adding water, to an approved mixer,

for not less than three minutes to reach workability.

3.4Cement for mortar in ashlar or for mortar squared stone masonry shall consist of Portland cement only.

3.5Mortars shall be used and placed in final position within two and one-half hours after mixing.

3.6Mortar for bridge curbs shall meet the requirements of 609.2.5 and shall be used as specified under 609.3.1.7.

New Hampshire Department of Transportation Standard Specifications – 2016

708.01Description. These specifications are intended to specif y paints that will meet service requirements for highway

construction. Paint shall be homogeneous, free of contaminant, and of a consistency suitable for use in the capacity for which it is specified. Finished paint shall be well ground, and the pigments hall be properly dispersed in the vehicle according to the requirements of the paint. The dispersion shall be of such nature that the pigment does not settle, does not cake or thicken in the container, and does not become granular or curdled. The paints hall be easily broken up with a paddle to form a smooth uniform product of the proper consistency and shall possess satisfactory properties in all respects which affect its application and curing. The color shall match the established standard. The hiding power shall be sufficient to obtain complete hiding of the preceding coat with a single application when applied at normal spreading rates. The finish coat shall dry to a semi -gloss finish, unless specified otherwise. The final color of the paint specified for the work shall conform to FED -STD-595B and the specific color number specified below. The Department may approve a manufacturer’s standard color provided it is very similar to that specified and color ch ips are submitted for approval before the paint is shipped. Federal Standard Colors Color Federal Color Number Light Green 24272 Dark Green 24109 Dark Brown 20062 Aluminum 17178 White 17925 Black 27038 For paint material and application requirements for painting structural steel and steel portions of other structures, refer to 550, 556, a Special Provision for Section 550, Structural Steel, and a Special Provision for Section 556, Painting Existing Structural Steel in the project contract documents.

708.02Packaging. All paint furnished mus t be shipped in original, sealed, strong, new containers having a capacity of not

more than 5 gal each. The containers shall be equipped with a lever -type ring seal or a lug- type cover and wire bails. Each container shall be so filled that the net weigh t of the material in the can is the product of the weight per gallon deter mined at 75º F- 80º F and the specified gallon capacity of the can. All containers of paint shall be clearly labeled with the following information: New Hampshire Paint Number, Name, and Color Name of Product Lot and Batch Number Date of Manufacture Volume and Weight of Contents Volatile Organic Compounds (VOC) Contents Instructions for opening, mixing, thinning and applying the paint Name and Address of Manufacturer

708.03Approval , Sampling and Testing. The Contractor shall submit the complete paint system in writing to the

Department for approval prior to use on the project. The Engineer shall be furnished with a Certificate of Compliance and Material Data Sheet for all paint prior to or upon delivery of painted structural steel to the project. (See 106.04.) The paint may be sampled by lot either at the point of manufacture or application as required for testing by the Department to ensure compliance with material specifications prior to use. Samples of paint furnished for field use shall be submitted at least ten working days before application, in order to allow the Engineer time for testing and accepting the paint. The Engineer may permit application of the paint in a shorter time upon approval of the manufacturer's Certificate of Compliance by the Bureau of Materials & Research. Unless otherwise provided, the materials entering into the composition of the paint shall conform to the requirements of the applicable ASTM and AASHTO standards and FSS covering such materials. Testing shall be in accordance with the latest test methods of the ASTM and AASHTO. However, the Department reserves the right to make use of any information or methods of testing to determine the quality of paint and paint materials.