Curing for Normal Concrete Surfaces Sample Clauses

Curing for Normal Concrete Surfaces. In order to achieve durable, impermeable concrete, all exposed surfaces (including joint surfaces) of strength concrete shall be properly and carefully cured. Curing shall take place from the time that the concrete has taken its initial set. (the length of time when formwork is in place may be deducted from the curing period). The use of membrane curing compounds will be allowed on vertical faces or steeply inclined faces (i.e. steeper than 15° to the horizontal) of cast in situ members of the structures. Approval will be subject to the Contractor producing sufficient, satisfactory cube crushing strength test results where the crushing strength of cubes which have been cured with the proposed curing membrane and left exposed to the elements are compared with those of an equal number of water cured cubes. The crushing strength of cubes cured with the proposed membrane shall be at least 85% of the crushing strength of the water cured cubes. Before any membrane curing compound is used, each batch shall be tested on a trial surface to ensure that it forms a satisfactory membrane, and any compound which is unsatisfactory in the opinion of the Engineer, shall be rejected. Curing membranes will be disallowed if permanent discolouration of the concrete takes place. Surfaces where curing membranes are used shall be treated in such a manner that the final concrete texture and colour blends in with the rest of the concrete work. Furthermore, the Engineer shall, at his discretion, require the Contractor immediately to adopt an effective alternative means of curing any area of the structure to which a membrane has been applied which, in the opinion of the Engineer, is unsatisfactory. The curing compound used shall be to the approval of the Engineer. Wax based curing compounds will not be permitted. The curing compound shall be applied immediately as formwork is progressively stripped or, in the case of unformed surfaces, when the concrete has taken its initial set. It shall preferably be applied by spraying and the rate of application shall be strictly in accordance with the manufacturer's recommendations. A method of monitoring the area to which curing compound has been applied and the application rate shall be as approved by the Engineer and rigidly applied by the Contractor. Surfaces of joint rebates, where elastomeric sealant is to be applied, shall be protected from contamination by curing compound by the use of masking tape. Curing times shall be included in the ...
Sample 1Sample 2Sample 3
AutoNDA by SimpleDocs

Related to Curing for Normal Concrete Surfaces

  • Completion of Concrete Pours and Emergency Work (a) Except as provided in this sub-clause an Employee shall nor work or be required to work in the rain. (b) Employees shall not be required to start a concrete pour in Inclement Weather. (c) Where a concrete pour has been commenced prior to the commencement of a period of Inclement Weather Employees may be required to complete such concrete pour to a practical stage and for such work shall be paid at the rate of double time calculated to the next hour, and in the case of wet weather shall be provided with adequate wet weather gear. (d) If an Employee’s clothes become wet as a result of working in the rain during a concrete pour the Employee shall, unless the Employee has a change of dry working clothes available, be allowed to go home without loss of pay. (e) The provisions of clauses 32.7(c) and 32.7(d) hereof shall also apply in the case of emergency work where the Employees concerned and their delegates agree that the work is of an emergency nature and can start and/or proceed.

  • ADDITIONAL SPECIAL CONTRACT CONDITIONS Special Contract Conditions revisions: the corresponding subsections of the Special Contract Conditions referenced below are replaced in their entirety with the following:

  • Geographic Area and Sector Specific Allowances, Conditions and Exceptions The following allowances and conditions shall apply where relevant. Where the Employer does work which falls under the following headings, the Employer agrees to pay and observe the relevant respective conditions and/or exceptions set out below in each case.

  • Use of Basement and Service Areas The basement(s) and service areas, if any, as located within the

  • Installation, Maintenance, Testing and Repair Unless otherwise agreed in writing by the Parties, to the extent required by Applicable Law, Interconnection provided by a Party shall be equal in quality to that provided by such Party to itself, any subsidiary, affiliates or third party. If either Party is unable to fulfill its obligations under this Section 14.2, it shall notify the other Party of its inability to do so and will negotiate alternative intervals in good faith. The Parties agree that to the extent required by Applicable Law, the standards to be used by a Party for isolating and clearing any disconnections and/or other outages or troubles shall be at parity with standards used by such Party with respect to itself, any subsidiary, affiliate or third party.

Draft better contracts in just 5 minutes Get the weekly Law Insider newsletter packed with expert videos, webinars, ebooks, and more!