Contract for Dams and Appurtenances; Forms for Contracts 1 to 5 Inclusive

Contract for Dams and Appurtenances; Forms for Contracts 1 to 5 Inclusive

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...the Contractor shall not allow water to rise on any concrete until, in the opinion of the Engineer, it has set sufficiently. All laitance or other substance shall be removed from the surface of concrete at such times, depending upon weather conditions and rate of hardening, as the Engineer may direct. Where new concrete is joined to old, or to rock, the surface of the old concrete or rock shall be thoroughly cleaned, using wire brushes and a jet of water from a hose if necessary, and the surface shall be clean and wet at the moment the fresh concrete is placed. If required, surfaces of concrete previously placed shall be satisfactorily roughened. A wash of neat cement grout shall be scrubbed into the contact surface of the old concrete or the rock with steel brooms immediately before placing concrete and shall be thoroughly worked into all crevices and depressions. When required, a coat of mortar shall be spread over the contact surfaces thus prepared. Provisions for bonding new concrete to old shall be made by the use of forms of such styles and dimensions as to properly form the concrete joints into steps, dovetails, grooves, or other ordered shapes. Where required large stones, dowels, or steel reinforcing rods shall be embedded in concrete for bonding new work to old. 0.96 Concrete--Construction Joints.--Wherever required the work shall be so prosecuted that construction joints will occur only at designated places, and when so directed, the Contractor shall complete by continuous depositing of concrete, sections of the work comprised between such joints.. 0.97 Concrete--Contraction Joints.--Contraction joints, expansion joints, and slip-joints shall be formed where and as directed in concrete structures. In general, such joints shall be more

Product details

  • Paperback | 48 pages
  • 189 x 246 x 3mm | 104g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123649072X
  • 9781236490728