Description
This reference specification provides requirements for hot weather concreting that the architect/engineer can apply to any construction project involving hot weather concreting by citing it in the project specification. Checklists are provided to assist the architect/engineer in supplementing the provisions of this reference specification as needed by designating or specifying customized project requirements. This specification includes hot weather requirements for production preparations, delivery, placement, finishing, bleed-water evaporation, curing, and concrete protection. Provisions governing a preplacement conference, concrete mixture proportions, maximum allowable concrete temperature, rate of surface evaporation measurements, evaporation control measures, and acceptance of a concrete mixture from past field experience or preconstruction testing are also included.
Keywords: bleeding; curing; evaporation; finishing; mixture proportioning; plastic shrinkage cracking; protection period; trial batch.
Table of Contents
Section 1- General
1.1—Scope
1.2––Definitions
1.3—Reference Standards
1.4—Submittals
1.5––Quality assurance, quality control, and acceptance of work
Section 2- Products
2.1—General
Section 3- Execution
3.1—General
3.2—Maximum temperature of fresh concrete at time of discharge
3.3—Qualification of concrete mixture
3.4—Concrete production and delivery
3.5—Concrete placement and finishing
3.6—Concrete bleed-water evaporation
3.7—Concrete curing
3.8—Concrete protection
Notes to Specifier
General notes
Foreword to checklists
Appendix A
Example of Uno Equation used to determine surface evaporation rate of fresh concrete.
Appendix B
Example of NRMCA nomograph for estimating surface evaporation rate on the basis of menzel formula
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