This section is from the book "The Law Of Contracts", by William Herbert Page. Also available from Amazon: Commercial Contracts: A Practical Guide to Deals, Contracts, Agreements and Promises.
The existing blocks on the street to be improved shall be recut and redressed in such mauner as to form one or more blocks of smaller size. The dimensions of the new blocks, excepting as noted below, shall be as follows: In length not less than five (5) nor more than eight (8) inches; in width not less than three and one-half (3 1/2) nor more than five (5) inches; in depth not less than four and three-quarters (4 3/4) nor more than five and one-quarter (5 1/4) inches.
In cutting the blocks the usual procedure will be as follows: Blocks ten (10) inches or more in length shall be cut transversely to their present length, with the newly cut surfaces constituting the paving faces of the new blocks. Blocks less than ten (10) inches in length, and blocks which, although longer, are so worn that two new blocks as above specified can not be cut therefrom, shall, if possible be reheaded in such manner as to form one new block eight (8) inches in length.
For the purpose of providing blocks of proper length for beginning and ending the courses with a minimum lap of two (2) inches, as large a number as practicable of short blocks four (4) inches in length, and long blocks eight (8) inches in length, shall be cut from existing short blocks in the street, or shall be obtained by cutting existing blocks of excessive length in such manner as to obtain one long and one short block. The deficiency in closures will be made up by the use of new paving blocks eight (8) inches in length, which, however, shall be used only to the extent considered necessary by the Engineer.
The blocks shall be recut so that the paving face conforms to the requirements for new Granite Blocks as previously specified, and the sides and ends shall be dressed to the extent necessary to allow joints of the same size as specified for new Granite Pavement.
All existing blocks which, in the opinion of the Engineer, are so rough or otherwise defective that new blocks as specified can not be cut from them will become the property of the Contractor, and shall be removed from the work, but no blocks shall be removed until definite orders have been issued by the Engineer.
The redressed blocks shall be separated into three sizes by widths as follows: From three and one-half (3 1/2) to four (4) inches; from four (4) to four and one-half (4 1/2) inches; from four and one-half (4 1/2) to five (5) inches; and each size must be paved in separate portions of the street as specified for new granite pavement.
In all other respects, except as above noted, pavement shall conform to the requirements for Granite Pavement, Item 63.
The paving bed will be of sand or sand - cement, and the filler will be of pitch, of pitch with flush coat, of pitch - mastic, or of cement grout, exactly as specified for new granite paving.
limestone pavement - item 67
The subgrade shall be eleven (11) inches below and parallel to the finished roadway surface. On the subgrade will be spread a layer of clean gravel, free from stones exceeding one (1) inch in diameter, on which the limestone block will be paved. The layer of gravel shall be approximately four (4) inches in depth.
The limestone blocks for the paving will consist of best grade of Indiana flat rock free from seams. The blocks shall be substantially rectangular and shall have the following dimensions: From eight (8) to twelve (12) inches long, from four (4) to six (6) inches wide and from six and one-half (6 1/2) to seven and one-half (7 1/2) inches deep. Projection on face, sides and ends shall not exceed one (1) inch. The blocks will be firmly bedded in the gravel base and paved in courses at right angles to the curbs with end and side joints approximately one (1) inch wide. The joints will then be filled two-thirds full with clean pebbles ranging in size from one-half to one inch in diameter and the paving will be thoroughly rammed with a bowlder rammer. After ramming, the surface of the paving must be true to the prescribed roadway grade and crown.
Expansion joints three-fourths (3/4) inch thick and prepared as prescribed for granite paving will be used along each curb.
Grout filler composed of the same ingredients as specified for brick paving will be then swept into the joints in such quantity as to thoroughly fill the joints from the bottom to a depth of one (1) inch down from the top. If this result can not be obtained by one application of grout, one or more additional, such as may be required, shall be made. Before making the second application the Contractor will be allowed to pour into the joints additional pebbles to a depth of one and one-half (1 1/2) inches down from the top.
Before the grout has become too hard all the joints shall be raked out by means of a tool satisfactory to the Engineer so that the finished top of the grout is at the uniform distance of one (1) inch from the top of the paving.
After the grout has taken its initial set, the pavement will be immediately covered with one-half (1/2) inch of sand and must be kept continuously moist for a period of five (5) days and must be kept blocked from all travel for ten (10) days additional and longer if the Engineer so directs.