611MORTAR FOR MASONRY

489

610.05Basis of Payment

The contract unit price for Loose Riprap, Concrete Sacked Riprap, Filter Blanket, and Tied Concrete Block Mat shall be full compensation for furnishing and hauling all materials, preparation of the placement area, placing materials and for all equipment, tools, labor and incidentals necessary to complete these items of work. The preparation of the area for the placement of riprap and tied concrete block mat includes excavation, dressing the placement area and surrounding area, and the disposal of any excess excavated material. Payment for this preparation shall be included in the contract unit price for the riprap unless otherwise noted on the plans.

610-A Loose Riprap, Class ____ , ____ inches {mm} Thick - per square yard {square meter} 610-B Concrete Sacked Riprap - per square yard {square meter} 610-C Loose Riprap, Class ____ - per ton {metric ton} 610-D Filter Blanket, * - per square yard {square meter} 610-E Tied Concrete Block Mat – per square yard {square meter} * If a specific type of blanket is required, so designate (aggregate or geotextile). MORTAR FOR MASONRY

611.01Description

This Section shall cover the work of furnishing mortar made in accordance with these specifications, for the various classes and kinds of masonry when its use is required.

611.02Materials

Materials shall conform to the provisions of Division 800, Materials. Specific reference is made to the following:  Masonry Cement Article 815.06  Sand Article 802.03  Water Article 807.01  Hydrated Lime Section 805

611.03Construction Requirements

The mortar shall be composed of one part of cement and two parts of sand by volume, on basis of dry sand, and sufficient water to make a mortar of such consistency that it can be easily handled and spread with a trowel. If directed, hydrated lime, not to exceed 15 percent of cement by weight {mass}, shall be added, except that if masonry cement is used hydrated lime will not be required. Mortar shall be mixed only in quantities required for immediate use. Unless an approved mortar mixing machine is used, the sand and cement shall be mixed dry in a watertight box until the mixture assumes a uniform color, after which water shall be added as the mixing continues until the mortar attains the proper consistency. Mortar which is not used within 45 minutes after water has been added shall be wasted. Retempering of mortar will not be permitted.

611.04Method of Measurement

No measurement will be made for mortar for masonry.

611.05Basis of Payment

Payment for mortar for masonry shall be included in unit prices of pay items for various kinds of masonry, and no direct payment will be made for mortar. RUBBLE MASONRY 490

RUBBLE MASONRY

612.01Description

This Section shall cover the work of furnishing and constructing Rubble Masonry consisting of approved stones laid in mortar as a means of constructing structures or parts of structures in accordance with these specifications to the lines and dimensions shown on the plans or designated. Rubble Masonry as herein specified shall include the Types commonly known as Coursed Rubble, Uncoursed Rubble, and Rustic Rubble.

612.02Materials

Materials shall conform to the provisions of Division 800, Materials. Specific reference is made to Type I and Type III, Masonry Stone, Subarticles 812.01(a) and (c), respectively. Mortar shall meet the requirements of Section 611, Mortar for Masonry.

612.03Construction Requirements

The stones shall be roughly squared on joints, beds and faces. All shaping or dressing of stone shall be done before the stone is laid and no dressing or hammering which will loosen the stone will be permitted after it is placed.

Only shaping required will be that to eliminate sharp points and projections.

Stone masonry shall not be constructed in freezing weather or when fresh mortar may be subject to freezing.

courses shall be composed of large, selected stones, and all courses shall be laid with bearing beds roughly parallel to the natural bed of the material. The stone and the layers shall decrease in thickness from bottom to top of wall. Stones of each color shall be uniformly distributed in exposed surfaces so that walls do not present a patched appearance. Selected stone, roughly squared and pitched to line, shall be used at all angles and ends of walls. Headers shall be evenly distributed and preferably arranged to interlock. Each stone shall be cleaned and saturated with water and shall be damp while being set, and the bed which is to receive it shall be cleaned and well moistened. All stones shall be well bedded in freshly made mortar. The mortar joints shall be full and the stones carefully settled in place before the mortar has set. No spalls will be permitted in the beds. Joints and beds shall have an average thickness of not more than 1 inch {25 mm}. The minimum thickness of mortar between stones shall be at least 1/2 inch {13 mm}. Whenever possible the face joints shall be properly pointed before the mortar becomes set. Joints which cannot be so pointed shall be prepared for pointing by raking them out to a depth of 1.5 inches {38 mm} before the mortar has set. The face surfaces of stones shall not be smeared with the mortar forced out of the joints or that used in pointing. The vertical joints in each course of coursed masonry shall break joints with those in adjoining courses at least 6 inches {150 mm}. In case any stone is moved or the joint broken, the stone shall be removed, the mortar cleaned from bed and joints, and the stone reset in fresh mortar. Weepholes shall be constructed where indicated on the plans or designated. Immediately after laying and while the mortar is fresh, all face stones shall be cleaned of all mortar, and mortar stains and kept clean and free from mortar stains.

or larger size than shown in the face. They shall extend not less than 12 inches {305 mm} into the core or backing and in walls 12 inches {610 mm} or less in thickness shall extend entirely through the wall. They shall occupy not less than 1/5 of the face of the wall.

joints and reasonably smooth faces and, if not coped, reasonably true lines on top of structure.

Copings, bridge seats and backwalls shall be of the materials and size shown on the plans and when not otherwise specified shall be Minor Structure Concrete which shall conform to the requirements for