ACI SPEC-305.1-14(20) Specification for Hot Weather Concreting

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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.


Document Details

Pages: 7

Categories: Hot Weather

Formats: Protected PDF/Web View, PDF, ePub, or Kindle

Table of Contents

Section 1- General



1.3—Reference Standards


1.5––Quality assurance, quality control, and acceptance of work

Section 2- Products


Section 3- Execution


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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