Curing and Protection. The Contractor shall take adequate measures to ensure that the concrete shall be kept damp continuously for a minimum of three (3) days after casting or for such other time as the Engineer may direct. After removal of this covering (layer of sacking, canvas, Hessian, straw mats or similar absorbent material or a layer of sand), the concrete shall then be sprayed with water for minimum period of a further fourteen (14) days. All concrete liable to be affected by running water or wave action shall be adequately protected from damage during the setting period and all temporary protection works shall be to the satisfaction of the Engineer.
Curing and Protection. Add the following to Clause 5.
Curing and Protection. The brick work shall be kept wet by misting (flooding not allowed) for 7 days commencing from 24 hours after the course is laid. At the end of the day's work the masonry construction shall be protected from harmful effects of rain, sun, and frost by suitable coverings such as tarpaulin or any other suitable coverings. Care shall be taken during construction that edges of jambs, xxxxx, heads etc. are not damaged. CW.6.14. Scaffolding Double scaffolding having two sets of vertical supports shall be provided as directed by the Engineer. The supports shall be sound and strong and of steel tubular construction unless otherwise by other approved means. The vertical posts shall be tied together with horizontal pieces over which the scaffolding planks be fixed. The three sides of the scaffolding should be covered with 1.0m wide plyboards to protect the materials from dropping off while working. Areas having work performed above ground floor shall be segregated for worker safety.
Curing and Protection. A. General: Start initial curing as soon as free water has disappeared from the concrete surface after placing and finishing. Keep concrete continuously moist for seven days minimum after placement.
B. Immediately after placement, protect concrete from premature drying, excessively hot or cold temperatures, and mechanical injury.
C. Maintain concrete with minimal moisture loss at relatively constant temperature for period necessary for hydration of cement and hardening of concrete.
Curing and Protection. Add Paragraph 3.7.B to read as follows: B Seal all joints in slab-on-grade and structural platform.
Curing and Protection. Care must be taken that no concrete is allowed to become prematurely dry and the fresh concrete must be carefully protected within two hours of placing from rain, sun and wind by means of hessian sacking, polythene sheeting, or other approved means. This protective layer and the concrete itself must be kept continuously wet for at least seven days after the concrete has been placed. The Contractor will be required to provide complete coverage of all fresh concrete for a period of 7 days. Hessian or polythene sheeting shall be in the maximum widths obtainable and shall be secured against wind. The Contractor will not be permitted to use old cement bags, hessian or other material in small pieces. Concrete in foundations and other underground work shall be protected from admixture with falling earth during and after placing. Traffic or loading must not be allowed on the concrete until the concrete is sufficiently matured, and in no case shall traffic or loading be of such magnitude as to cause deflection or other movement in the formwork or damage to the concrete members. Where directed by the Engineer props may be required to be left in position under slabs and other members for greater periods than those specified hereafter.
Curing and Protection. Comply with requirements of ACI 308. Immediately after placement, protect concrete from premature drying, excessively hot or cold temperatures, and mechanical injury.
Curing and Protection. Curing: All newly placed concrete shall be cured by one or more of the following methods:
Curing and Protection. Protect the finished subgrade against drying for 72 hours after compaction by spraying with water to maintain a continuous moist condition. The Contractor may apply an asphalt prime coat immediately after trimming instead of keeping the finished surface moist with water. If this option is chosen, apply SS-1H or CSS-1H at the rate of 0.22 gallons per square yard to achieve a minimum of 0.13 gallons per square yard residue. Multiple light applications may be necessary to obtain the specified rate of application without run-off. Avoid placing construction loads or operating equipment until the treated subgrade has cured and can withstand the loads without damaging the subgrade. If the subgrade deforms under the construction loads and cannot return back to its original condition, or if it deflects more than 1 inch, allow the subgrade additional curing time before operating equipment on the subgrade. Repair any damaged subgrade. Cover the finished treated subgrade with surfacing before it is subjected to freezing. If the finished treated subgrade is subjected to freezing, the Engineer will determine when the subgrade needs to be reworked. KDOT will not pay for the replacement and refinishing of the treated subgrade if the material loses the required stability, density or finish before the next course is placed.
