612RUBBLE 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 BRICK AND CONCRETE BLOCK MASONRY 491

than 8 inches {200 mm} in thickness and from 5 to 10 feet {1.5 to 3 m} long. The sections may be cast in place or precast and set in place in full mortar beds.

Pointing shall not be done in freezing weather or when the stone contains frost. Joints not pointed at the time the stone is laid shall be wet with clean water and filled with mortar. The mortar shall be well driven into the joints and finished with an approved pointing tool. The wall shall be kept moist while pointing is being done and in hot dry weather the pointed masonry shall be protected from the sun and kept wet for a period of at least three (3) days after the mortar has set, or be cured as provided by Subarticle 450.03(m). After the pointing is completed and the mortar set, the wall shall be satisfactorily cleaned and left in a neat and workmanlike condition.

612.04Measurement

Accepted Rubble Masonry will be measured complete in place, and the volume actually constructed within the neat lines of the work shown on the plans or designated will be computed in cubic yards {cubic meters}.

612.05Basis of Payment

The accepted volume of rubble masonry measured as above described will be paid for at the respective unit prices bid per cubic yard {cubic meter} for Coursed Rubble Masonry, Uncoursed Rubble Masonry, and Rustic Rubble Masonry, complete in place, which shall be payment in full for all material, equipment, tools, labor and incidentals necessary for the satisfactory completion of the work.

Concrete used in conjunction with the Rubble Masonry will be paid for as provided under Minor Structure Concrete, Section 620.

612-A Type Rubble Masonry - per cubic yard {cubic meter} BRICK AND CONCRETE BLOCK MASONRY

613.01Description

This Section shall cover the work of constructing Brick or Concrete Block Masonry in accordance with these specifications at the locations and to the dimensions, lines, and grades as shown on the plans or established.

613.02Materials

All materials shall conform to the requirements of Division 800, Materials. Specific reference is made to the following:  Section 805 - Building Brick (Grade MW clay or shale brick unless otherwise specified on the plans or Concrete Brick and Concrete Block.)  Section 611 - Mortar for Masonry.

613.03Construction Requirements

The foundation shall be constructed firm and dry. All brick shall be damp at the time of laying. Bricks shall be laid in courses in full, close, uniform joints of mortar. Adjoining courses shall break joints by one-half length as nearly as practicable. The courses shall be level in all places, except where otherwise directed. All exposed surfaces shall be smooth and clean and the tie joint shall not exceed 1/2 inch {13 mm} in width. Broken or chipped bricks shall not be used in the faces of the masonry. The joints shall be cleaned and pointed before the mortar sets. The exposed surfaces of the bricks shall not be smeared with mortar forced out of the joints or that used in pointing, but shall be kept clean and free from mortar stains. For straight masonry walls, at least one course in seven shall be a header course. No masonry work shall be done in freezing weather.